/*-------------------------------------------------------------------------
SDCCgen51.c - source file for code generation for 8051
-
+
Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
and - Jean-Louis VERN.jlvern@writeme.com (1999)
Bug Fixes - Wojciech Stryjewski wstryj1@tiger.lsu.edu (1999 v2.1.9a)
-
+
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
+
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding!
-
+
Notes:
- 000123 mlh Moved aopLiteral to SDCCglue.c to help the split
- Made everything static
+ 000123 mlh Moved aopLiteral to SDCCglue.c to help the split
+ Made everything static
-------------------------------------------------------------------------*/
+//#define D(x)
+#define D(x) x
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "SDCCglobl.h"
-
-#ifdef HAVE_SYS_ISA_DEFS_H
-#include <sys/isa_defs.h>
-#else
-#ifdef HAVE_ENDIAN_H
-#include <endian.h>
-#else
-#warning "Cannot determine ENDIANESS of this machine assuming LITTLE_ENDIAN"
-#warning "If you running sdcc on an INTEL 80x86 Platform you are okay"
-#endif
-#endif
+#include "newalloc.h"
#include "common.h"
#include "SDCCpeeph.h"
#include "ralloc.h"
#include "gen.h"
-char *aopLiteral (value *val, int offset);
+char *aopLiteral (value * val, int offset);
+extern int allocInfo;
-/* this is the down and dirty file with all kinds of
+/* this is the down and dirty file with all kinds of
kludgy & hacky stuff. This is what it is all about
CODE GENERATION for a specific MCU . some of the
routines may be reusable, will have to see */
static char *zero = "#0x00";
-static char *one = "#0x01";
-static char *spname ;
+static char *one = "#0x01";
+static char *spname;
-static char *fReturn8051[] = {"dpl","dph","b","a" };
-static char *fReturn390[] = {"dpl","dph","dpx", "b","a" };
-unsigned fReturnSize = 4; /* shared with ralloc.c */
-static char **fReturn = fReturn8051;
-static char *accUse[] = {"a","b"};
+char *fReturn8051[] =
+{"dpl", "dph", "b", "a"};
+unsigned fReturnSizeMCS51 = 4; /* shared with ralloc.c */
+char **fReturn = fReturn8051;
+static char *accUse[] =
+{"a", "b"};
-static short rbank = -1;
+static unsigned short rbank = -1;
-static struct {
+static struct
+ {
short r0Pushed;
short r1Pushed;
short accInUse;
short debugLine;
short nRegsSaved;
set *sendSet;
-} _G;
+ iCode *current_iCode;
+ }
+_G;
-extern int mcs51_ptrRegReq ;
+static char *rb1regs[] = {
+ "b1_0","b1_1","b1_2","b1_3","b1_4","b1_5","b1_6","b1_7"
+};
+
+extern int mcs51_ptrRegReq;
extern int mcs51_nRegs;
extern FILE *codeOutFile;
-static void saverbank (int, iCode *,bool);
+static void saveRBank (int, iCode *, bool);
#define RESULTONSTACK(x) \
(IC_RESULT(x) && IC_RESULT(x)->aop && \
IC_RESULT(x)->aop->type == AOP_STK )
-#define MOVA(x) if (strcmp(x,"a") && strcmp(x,"acc")) emitcode("mov","a,%s",x);
-#define CLRC emitcode("clr","c");
+#define MOVA(x) mova(x) /* use function to avoid multiple eval */
+#define CLRC emitcode("clr","c")
+#define SETC emitcode("setb","c")
static lineNode *lineHead = NULL;
static lineNode *lineCurr = NULL;
-static unsigned char SLMask[] = {0xFF ,0xFE, 0xFC, 0xF8, 0xF0,
-0xE0, 0xC0, 0x80, 0x00};
-static unsigned char SRMask[] = {0xFF, 0x7F, 0x3F, 0x1F, 0x0F,
-0x07, 0x03, 0x01, 0x00};
+static unsigned char SLMask[] =
+{0xFF, 0xFE, 0xFC, 0xF8, 0xF0,
+ 0xE0, 0xC0, 0x80, 0x00};
+static unsigned char SRMask[] =
+{0xFF, 0x7F, 0x3F, 0x1F, 0x0F,
+ 0x07, 0x03, 0x01, 0x00};
#define LSB 0
#define MSB16 1
/*-----------------------------------------------------------------*/
/* emitcode - writes the code into a file : for now it is simple */
/*-----------------------------------------------------------------*/
-static void emitcode (char *inst,char *fmt, ...)
+static void
+emitcode (char *inst, const char *fmt,...)
{
- va_list ap;
- char lb[MAX_INLINEASM];
- char *lbp = lb;
+ va_list ap;
+ char lb[INITIAL_INLINEASM];
+ char *lbp = lb;
- va_start(ap,fmt);
+ va_start (ap, fmt);
- if (inst && *inst) {
- if (fmt && *fmt)
- sprintf(lb,"%s\t",inst);
- else
- sprintf(lb,"%s",inst);
- vsprintf(lb+(strlen(lb)),fmt,ap);
- } else
- vsprintf(lb,fmt,ap);
+ if (inst && *inst)
+ {
+ if (fmt && *fmt)
+ sprintf (lb, "%s\t", inst);
+ else
+ sprintf (lb, "%s", inst);
+ vsprintf (lb + (strlen (lb)), fmt, ap);
+ }
+ else
+ vsprintf (lb, fmt, ap);
- while (isspace(*lbp)) lbp++;
+ while (isspace (*lbp))
+ lbp++;
- if (lbp && *lbp)
- lineCurr = (lineCurr ?
- connectLine(lineCurr,newLineNode(lb)) :
- (lineHead = newLineNode(lb)));
- lineCurr->isInline = _G.inLine;
- lineCurr->isDebug = _G.debugLine;
- va_end(ap);
+ if (lbp && *lbp)
+ lineCurr = (lineCurr ?
+ connectLine (lineCurr, newLineNode (lb)) :
+ (lineHead = newLineNode (lb)));
+ lineCurr->isInline = _G.inLine;
+ lineCurr->isDebug = _G.debugLine;
+ lineCurr->ic = _G.current_iCode;
+ lineCurr->isComment = (*lbp==';');
+ va_end (ap);
}
/*-----------------------------------------------------------------*/
-/* getFreePtr - returns r0 or r1 whichever is free or can be pushed*/
+/* mova - moves specified value into accumulator */
/*-----------------------------------------------------------------*/
-static regs *getFreePtr (iCode *ic, asmop **aopp, bool result)
+static void
+mova (const char *x)
{
- bool r0iu = FALSE , r1iu = FALSE;
- bool r0ou = FALSE , r1ou = FALSE;
+ /* do some early peephole optimization */
+ if (!strcmp(x, "a") || !strcmp(x, "acc"))
+ return;
- /* the logic: if r0 & r1 used in the instruction
- then we are in trouble otherwise */
+ emitcode("mov","a,%s", x);
+}
- /* first check if r0 & r1 are used by this
- instruction, in which case we are in trouble */
- if ((r0iu = bitVectBitValue(ic->rUsed,R0_IDX)) &&
- (r1iu = bitVectBitValue(ic->rUsed,R1_IDX)))
- {
- goto endOfWorld;
- }
+/*-----------------------------------------------------------------*/
+/* getFreePtr - returns r0 or r1 whichever is free or can be pushed */
+/*-----------------------------------------------------------------*/
+static regs *
+getFreePtr (iCode * ic, asmop ** aopp, bool result)
+{
+ bool r0iu = FALSE, r1iu = FALSE;
+ bool r0ou = FALSE, r1ou = FALSE;
- r0ou = bitVectBitValue(ic->rMask,R0_IDX);
- r1ou = bitVectBitValue(ic->rMask,R1_IDX);
+ /* the logic: if r0 & r1 used in the instruction
+ then we are in trouble otherwise */
- /* if no usage of r0 then return it */
- if (!r0iu && !r0ou) {
- ic->rUsed = bitVectSetBit(ic->rUsed,R0_IDX);
- (*aopp)->type = AOP_R0;
-
- return (*aopp)->aopu.aop_ptr = mcs51_regWithIdx(R0_IDX);
+ /* first check if r0 & r1 are used by this
+ instruction, in which case we are in trouble */
+ r0iu = bitVectBitValue (ic->rUsed, R0_IDX);
+ r1iu = bitVectBitValue (ic->rUsed, R1_IDX);
+ if (r0iu && r1iu) {
+ goto endOfWorld;
}
- /* if no usage of r1 then return it */
- if (!r1iu && !r1ou) {
- ic->rUsed = bitVectSetBit(ic->rUsed,R1_IDX);
- (*aopp)->type = AOP_R1;
+ r0ou = bitVectBitValue (ic->rMask, R0_IDX);
+ r1ou = bitVectBitValue (ic->rMask, R1_IDX);
- return (*aopp)->aopu.aop_ptr = mcs51_regWithIdx(R1_IDX);
- }
+ /* if no usage of r0 then return it */
+ if (!r0iu && !r0ou)
+ {
+ ic->rUsed = bitVectSetBit (ic->rUsed, R0_IDX);
+ (*aopp)->type = AOP_R0;
- /* now we know they both have usage */
- /* if r0 not used in this instruction */
- if (!r0iu) {
- /* push it if not already pushed */
- if (!_G.r0Pushed) {
- emitcode ("push","%s",
- mcs51_regWithIdx(R0_IDX)->dname);
- _G.r0Pushed++ ;
- }
-
- ic->rUsed = bitVectSetBit(ic->rUsed,R0_IDX);
- (*aopp)->type = AOP_R0;
+ return (*aopp)->aopu.aop_ptr = mcs51_regWithIdx (R0_IDX);
+ }
- return (*aopp)->aopu.aop_ptr = mcs51_regWithIdx(R0_IDX);
+ /* if no usage of r1 then return it */
+ if (!r1iu && !r1ou)
+ {
+ ic->rUsed = bitVectSetBit (ic->rUsed, R1_IDX);
+ (*aopp)->type = AOP_R1;
+
+ return (*aopp)->aopu.aop_ptr = mcs51_regWithIdx (R1_IDX);
}
- /* if r1 not used then */
+ /* now we know they both have usage */
+ /* if r0 not used in this instruction */
+ if (!r0iu)
+ {
+ /* push it if not already pushed */
+ if (!_G.r0Pushed)
+ {
+ emitcode ("push", "%s",
+ mcs51_regWithIdx (R0_IDX)->dname);
+ _G.r0Pushed++;
+ }
+
+ ic->rUsed = bitVectSetBit (ic->rUsed, R0_IDX);
+ (*aopp)->type = AOP_R0;
- if (!r1iu) {
- /* push it if not already pushed */
- if (!_G.r1Pushed) {
- emitcode ("push","%s",
- mcs51_regWithIdx(R1_IDX)->dname);
- _G.r1Pushed++ ;
- }
-
- ic->rUsed = bitVectSetBit(ic->rUsed,R1_IDX);
- (*aopp)->type = AOP_R1;
- return mcs51_regWithIdx(R1_IDX);
+ return (*aopp)->aopu.aop_ptr = mcs51_regWithIdx (R0_IDX);
}
-endOfWorld :
- /* I said end of world but not quite end of world yet */
- /* if this is a result then we can push it on the stack*/
- if (result) {
- (*aopp)->type = AOP_STK;
- return NULL;
+ /* if r1 not used then */
+
+ if (!r1iu)
+ {
+ /* push it if not already pushed */
+ if (!_G.r1Pushed)
+ {
+ emitcode ("push", "%s",
+ mcs51_regWithIdx (R1_IDX)->dname);
+ _G.r1Pushed++;
+ }
+
+ ic->rUsed = bitVectSetBit (ic->rUsed, R1_IDX);
+ (*aopp)->type = AOP_R1;
+ return mcs51_regWithIdx (R1_IDX);
}
+endOfWorld:
+ /* I said end of world, but not quite end of world yet */
+ if (result) {
+ /* we can push it on the stack */
+ (*aopp)->type = AOP_STK;
+ return NULL;
+ } else {
+ /* in the case that result AND left AND right needs a pointer reg
+ we can safely use the result's */
+ if (bitVectBitValue (mcs51_rUmaskForOp(IC_RESULT(ic)), R0_IDX)) {
+ (*aopp)->type = AOP_R0;
+ return mcs51_regWithIdx (R0_IDX);
+ }
+ if (bitVectBitValue (mcs51_rUmaskForOp(IC_RESULT(ic)), R1_IDX)) {
+ (*aopp)->type = AOP_R1;
+ return mcs51_regWithIdx (R1_IDX);
+ }
+ }
- piCode(ic,stdout);
- /* other wise this is true end of the world */
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "getFreePtr should never reach here");
- exit(0);
+ /* now this is REALLY the end of the world */
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "getFreePtr should never reach here");
+ exit (1);
}
/*-----------------------------------------------------------------*/
/* newAsmop - creates a new asmOp */
/*-----------------------------------------------------------------*/
-static asmop *newAsmop (short type)
+static asmop *
+newAsmop (short type)
{
- asmop *aop;
+ asmop *aop;
- ALLOC(aop,sizeof(asmop));
- aop->type = type;
- return aop;
+ aop = Safe_calloc (1, sizeof (asmop));
+ aop->type = type;
+ return aop;
}
/*-----------------------------------------------------------------*/
/* pointerCode - returns the code for a pointer type */
/*-----------------------------------------------------------------*/
-static int pointerCode (link *etype)
+static int
+pointerCode (sym_link * etype)
{
- int p_type;
- return PTR_TYPE(SPEC_OCLS(etype));
+ return PTR_TYPE (SPEC_OCLS (etype));
-/* if (SPEC_OCLS(etype)->codesp ) { */
-/* p_type = CPOINTER ; */
-/* } */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && !SPEC_OCLS(etype)->paged) */
-/* p_type = FPOINTER ; */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && SPEC_OCLS(etype)->paged) */
-/* p_type = PPOINTER; */
-/* else */
-/* if (SPEC_OCLS(etype) == idata ) */
-/* p_type = IPOINTER; */
-/* else */
-/* p_type = POINTER ; */
-/* return p_type; */
}
+
/*-----------------------------------------------------------------*/
-/* aopForSym - for a true symbol */
+/* leftRightUseAcc - returns size of accumulator use by operands */
/*-----------------------------------------------------------------*/
-static asmop *aopForSym (iCode *ic,symbol *sym,bool result)
+static int
+leftRightUseAcc(iCode *ic)
{
- asmop *aop;
- memmap *space= SPEC_OCLS(sym->etype);
+ operand *op;
+ int size;
+ int accuseSize = 0;
+ int accuse = 0;
+
+ if (!ic)
+ {
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "null iCode pointer");
+ return 0;
+ }
+
+ if (ic->op == IFX)
+ {
+ op = IC_COND (ic);
+ if (IS_SYMOP (op) && OP_SYMBOL (op) && OP_SYMBOL (op)->accuse)
+ {
+ accuse = 1;
+ size = getSize (OP_SYMBOL (op)->type);
+ if (size>accuseSize)
+ accuseSize = size;
+ }
+ }
+ else if (ic->op == JUMPTABLE)
+ {
+ op = IC_JTCOND (ic);
+ if (IS_SYMOP (op) && OP_SYMBOL (op) && OP_SYMBOL (op)->accuse)
+ {
+ accuse = 1;
+ size = getSize (OP_SYMBOL (op)->type);
+ if (size>accuseSize)
+ accuseSize = size;
+ }
+ }
+ else
+ {
+ op = IC_LEFT (ic);
+ if (IS_SYMOP (op) && OP_SYMBOL (op) && OP_SYMBOL (op)->accuse)
+ {
+ accuse = 1;
+ size = getSize (OP_SYMBOL (op)->type);
+ if (size>accuseSize)
+ accuseSize = size;
+ }
+ op = IC_RIGHT (ic);
+ if (IS_SYMOP (op) && OP_SYMBOL (op) && OP_SYMBOL (op)->accuse)
+ {
+ accuse = 1;
+ size = getSize (OP_SYMBOL (op)->type);
+ if (size>accuseSize)
+ accuseSize = size;
+ }
+ }
+
+ if (accuseSize)
+ return accuseSize;
+ else
+ return accuse;
+}
- /* if already has one */
- if (sym->aop)
- return sym->aop;
- /* assign depending on the storage class */
- /* if it is on the stack or indirectly addressable */
- /* space we need to assign either r0 or r1 to it */
- if (sym->onStack || sym->iaccess) {
- sym->aop = aop = newAsmop(0);
- aop->aopu.aop_ptr = getFreePtr(ic,&aop,result);
- aop->size = getSize(sym->type);
+/*-----------------------------------------------------------------*/
+/* aopForSym - for a true symbol */
+/*-----------------------------------------------------------------*/
+static asmop *
+aopForSym (iCode * ic, symbol * sym, bool result)
+{
+ asmop *aop;
+ memmap *space;
- /* now assign the address of the variable to
- the pointer register */
- if (aop->type != AOP_STK) {
+ wassertl (ic != NULL, "Got a null iCode");
+ wassertl (sym != NULL, "Got a null symbol");
- if (sym->onStack) {
+ space = SPEC_OCLS (sym->etype);
- if ( _G.accInUse )
- emitcode("push","acc");
+ /* if already has one */
+ if (sym->aop)
+ return sym->aop;
- emitcode("mov","a,_bp");
- emitcode("add","a,#0x%02x",
- ((sym->stack < 0) ?
- ((char)(sym->stack - _G.nRegsSaved )) :
- ((char)sym->stack)) & 0xff);
- emitcode("mov","%s,a",
- aop->aopu.aop_ptr->name);
+ /* assign depending on the storage class */
+ /* if it is on the stack or indirectly addressable */
+ /* space we need to assign either r0 or r1 to it */
+ if (sym->onStack || sym->iaccess)
+ {
+ sym->aop = aop = newAsmop (0);
+ aop->aopu.aop_ptr = getFreePtr (ic, &aop, result);
+ aop->size = getSize (sym->type);
- if ( _G.accInUse )
- emitcode("pop","acc");
+ /* now assign the address of the variable to
+ the pointer register */
+ if (aop->type != AOP_STK)
+ {
- } else
- emitcode("mov","%s,#%s",
- aop->aopu.aop_ptr->name,
- sym->rname);
- aop->paged = space->paged;
- } else
- aop->aopu.aop_stk = sym->stack;
- return aop;
+ if (sym->onStack)
+ {
+ if (_G.accInUse || leftRightUseAcc (ic))
+ emitcode ("push", "acc");
+
+ emitcode ("mov", "a,_bp");
+ emitcode ("add", "a,#0x%02x",
+ ((sym->stack < 0) ?
+ ((char) (sym->stack - _G.nRegsSaved)) :
+ ((char) sym->stack)) & 0xff);
+ emitcode ("mov", "%s,a",
+ aop->aopu.aop_ptr->name);
+
+ if (_G.accInUse || leftRightUseAcc (ic))
+ emitcode ("pop", "acc");
+ }
+ else
+ emitcode ("mov", "%s,#%s",
+ aop->aopu.aop_ptr->name,
+ sym->rname);
+ aop->paged = space->paged;
+ }
+ else
+ aop->aopu.aop_stk = sym->stack;
+ return aop;
}
- /* if in bit space */
- if (IN_BITSPACE(space)) {
- sym->aop = aop = newAsmop (AOP_CRY);
- aop->aopu.aop_dir = sym->rname ;
- aop->size = getSize(sym->type);
- return aop;
+ /* if in bit space */
+ if (IN_BITSPACE (space))
+ {
+ sym->aop = aop = newAsmop (AOP_CRY);
+ aop->aopu.aop_dir = sym->rname;
+ aop->size = getSize (sym->type);
+ return aop;
}
- /* if it is in direct space */
- if (IN_DIRSPACE(space)) {
- sym->aop = aop = newAsmop (AOP_DIR);
- aop->aopu.aop_dir = sym->rname ;
- aop->size = getSize(sym->type);
- return aop;
+ /* if it is in direct space */
+ if (IN_DIRSPACE (space))
+ {
+ //printf("aopForSym, using AOP_DIR for %s (%x)\n", sym->name, sym);
+ //printTypeChainRaw(sym->type, NULL);
+ //printf("space = %s\n", space ? space->sname : "NULL");
+ sym->aop = aop = newAsmop (AOP_DIR);
+ aop->aopu.aop_dir = sym->rname;
+ aop->size = getSize (sym->type);
+ return aop;
}
- /* special case for a function */
- if (IS_FUNC(sym->type)) {
- sym->aop = aop = newAsmop(AOP_IMMD);
- ALLOC_ATOMIC(aop->aopu.aop_immd,strlen(sym->rname)+1);
- strcpy(aop->aopu.aop_immd,sym->rname);
- aop->size = FPTRSIZE;
- return aop;
+ /* special case for a function */
+ if (IS_FUNC (sym->type))
+ {
+ sym->aop = aop = newAsmop (AOP_IMMD);
+ aop->aopu.aop_immd.aop_immd1 = Safe_calloc (1, strlen (sym->rname) + 1);
+ strcpy (aop->aopu.aop_immd.aop_immd1, sym->rname);
+ aop->size = FPTRSIZE;
+ return aop;
}
- /* only remaining is far space */
- /* in which case DPTR gets the address */
- sym->aop = aop = newAsmop(AOP_DPTR);
- emitcode ("mov","dptr,#%s", sym->rname);
- aop->size = getSize(sym->type);
+ /* only remaining is far space */
+ /* in which case DPTR gets the address */
+ sym->aop = aop = newAsmop (AOP_DPTR);
+ emitcode ("mov", "dptr,#%s", sym->rname);
+ aop->size = getSize (sym->type);
- /* if it is in code space */
- if (IN_CODESPACE(space))
- aop->code = 1;
+ /* if it is in code space */
+ if (IN_CODESPACE (space))
+ aop->code = 1;
- return aop;
+ return aop;
}
/*-----------------------------------------------------------------*/
/* aopForRemat - rematerialzes an object */
/*-----------------------------------------------------------------*/
-static asmop *aopForRemat (symbol *sym)
+static asmop *
+aopForRemat (symbol * sym)
{
- char *s = buffer;
- iCode *ic = sym->rematiCode;
- asmop *aop = newAsmop(AOP_IMMD);
+ iCode *ic = sym->rematiCode;
+ asmop *aop = newAsmop (AOP_IMMD);
+ int ptr_type=0;
+ int val = 0;
- while (1) {
-
- /* if plus or minus print the right hand side */
- if (ic->op == '+' || ic->op == '-') {
- sprintf(s,"0x%04x %c ",(int) operandLitValue(IC_RIGHT(ic)),
- ic->op );
- s += strlen(s);
- ic = OP_SYMBOL(IC_LEFT(ic))->rematiCode;
- continue ;
- }
-
- /* we reached the end */
- sprintf(s,"%s",OP_SYMBOL(IC_LEFT(ic))->rname);
- break;
- }
-
- ALLOC_ATOMIC(aop->aopu.aop_immd,strlen(buffer)+1);
- strcpy(aop->aopu.aop_immd,buffer);
- return aop;
+ for (;;)
+ {
+ if (ic->op == '+')
+ val += (int) operandLitValue (IC_RIGHT (ic));
+ else if (ic->op == '-')
+ val -= (int) operandLitValue (IC_RIGHT (ic));
+ else if (IS_CAST_ICODE(ic)) {
+ sym_link *from_type = operandType(IC_RIGHT(ic));
+ aop->aopu.aop_immd.from_cast_remat = 1;
+ ic = OP_SYMBOL (IC_RIGHT (ic))->rematiCode;
+ ptr_type = DCL_TYPE(from_type);
+ if (ptr_type == IPOINTER) {
+ // bug #481053
+ ptr_type = POINTER;
+ }
+ continue ;
+ } else break;
+
+ ic = OP_SYMBOL (IC_LEFT (ic))->rematiCode;
+ }
+
+ if (val)
+ sprintf (buffer, "(%s %c 0x%04x)",
+ OP_SYMBOL (IC_LEFT (ic))->rname,
+ val >= 0 ? '+' : '-',
+ abs (val) & 0xffff);
+ else
+ strcpy (buffer, OP_SYMBOL (IC_LEFT (ic))->rname);
+
+ aop->aopu.aop_immd.aop_immd1 = Safe_calloc (1, strlen (buffer) + 1);
+ strcpy (aop->aopu.aop_immd.aop_immd1, buffer);
+ /* set immd2 field if required */
+ if (aop->aopu.aop_immd.from_cast_remat) {
+ sprintf(buffer,"#0x%02x",ptr_type);
+ aop->aopu.aop_immd.aop_immd2 = Safe_calloc (1, strlen (buffer) + 1);
+ strcpy (aop->aopu.aop_immd.aop_immd2, buffer);
+ }
+
+ return aop;
}
/*-----------------------------------------------------------------*/
/* regsInCommon - two operands have some registers in common */
/*-----------------------------------------------------------------*/
-static bool regsInCommon (operand *op1, operand *op2)
+static bool
+regsInCommon (operand * op1, operand * op2)
{
- symbol *sym1, *sym2;
- int i;
+ symbol *sym1, *sym2;
+ int i;
- /* if they have registers in common */
- if (!IS_SYMOP(op1) || !IS_SYMOP(op2))
- return FALSE ;
+ /* if they have registers in common */
+ if (!IS_SYMOP (op1) || !IS_SYMOP (op2))
+ return FALSE;
- sym1 = OP_SYMBOL(op1);
- sym2 = OP_SYMBOL(op2);
+ sym1 = OP_SYMBOL (op1);
+ sym2 = OP_SYMBOL (op2);
- if (sym1->nRegs == 0 || sym2->nRegs == 0)
- return FALSE ;
+ if (sym1->nRegs == 0 || sym2->nRegs == 0)
+ return FALSE;
- for (i = 0 ; i < sym1->nRegs ; i++) {
- int j;
- if (!sym1->regs[i])
- continue ;
+ for (i = 0; i < sym1->nRegs; i++)
+ {
+ int j;
+ if (!sym1->regs[i])
+ continue;
- for (j = 0 ; j < sym2->nRegs ;j++ ) {
- if (!sym2->regs[j])
- continue ;
+ for (j = 0; j < sym2->nRegs; j++)
+ {
+ if (!sym2->regs[j])
+ continue;
- if (sym2->regs[j] == sym1->regs[i])
- return TRUE ;
- }
+ if (sym2->regs[j] == sym1->regs[i])
+ return TRUE;
+ }
}
- return FALSE ;
+ return FALSE;
}
/*-----------------------------------------------------------------*/
/* operandsEqu - equivalent */
/*-----------------------------------------------------------------*/
-static bool operandsEqu ( operand *op1, operand *op2)
+static bool
+operandsEqu (operand * op1, operand * op2)
{
- symbol *sym1, *sym2;
+ symbol *sym1, *sym2;
- /* if they not symbols */
- if (!IS_SYMOP(op1) || !IS_SYMOP(op2))
- return FALSE;
+ /* if they not symbols */
+ if (!IS_SYMOP (op1) || !IS_SYMOP (op2))
+ return FALSE;
- sym1 = OP_SYMBOL(op1);
- sym2 = OP_SYMBOL(op2);
+ sym1 = OP_SYMBOL (op1);
+ sym2 = OP_SYMBOL (op2);
- /* if both are itemps & one is spilt
- and the other is not then false */
- if (IS_ITEMP(op1) && IS_ITEMP(op2) &&
- sym1->isspilt != sym2->isspilt )
- return FALSE ;
+ /* if both are itemps & one is spilt
+ and the other is not then false */
+ if (IS_ITEMP (op1) && IS_ITEMP (op2) &&
+ sym1->isspilt != sym2->isspilt)
+ return FALSE;
- /* if they are the same */
- if (sym1 == sym2)
- return TRUE ;
+ /* if they are the same */
+ if (sym1 == sym2)
+ return TRUE;
- if (strcmp(sym1->rname,sym2->rname) == 0)
- return TRUE;
+ if (strcmp (sym1->rname, sym2->rname) == 0)
+ return TRUE;
- /* if left is a tmp & right is not */
- if (IS_ITEMP(op1) &&
- !IS_ITEMP(op2) &&
- sym1->isspilt &&
- (sym1->usl.spillLoc == sym2))
- return TRUE;
+ /* if left is a tmp & right is not */
+ if (IS_ITEMP (op1) &&
+ !IS_ITEMP (op2) &&
+ sym1->isspilt &&
+ (sym1->usl.spillLoc == sym2))
+ return TRUE;
- if (IS_ITEMP(op2) &&
- !IS_ITEMP(op1) &&
- sym2->isspilt &&
- sym1->level > 0 &&
- (sym2->usl.spillLoc == sym1))
- return TRUE ;
+ if (IS_ITEMP (op2) &&
+ !IS_ITEMP (op1) &&
+ sym2->isspilt &&
+ sym1->level > 0 &&
+ (sym2->usl.spillLoc == sym1))
+ return TRUE;
- return FALSE ;
+ return FALSE;
}
/*-----------------------------------------------------------------*/
/* sameRegs - two asmops have the same registers */
/*-----------------------------------------------------------------*/
-static bool sameRegs (asmop *aop1, asmop *aop2 )
+static bool
+sameRegs (asmop * aop1, asmop * aop2)
{
- int i;
+ int i;
- if (aop1 == aop2)
- return TRUE ;
+ if (aop1 == aop2)
+ return TRUE;
- if (aop1->type != AOP_REG ||
- aop2->type != AOP_REG )
- return FALSE ;
+ if (aop1->type != AOP_REG ||
+ aop2->type != AOP_REG)
+ return FALSE;
- if (aop1->size != aop2->size )
- return FALSE ;
+ if (aop1->size != aop2->size)
+ return FALSE;
- for (i = 0 ; i < aop1->size ; i++ )
- if (aop1->aopu.aop_reg[i] !=
- aop2->aopu.aop_reg[i] )
- return FALSE ;
+ for (i = 0; i < aop1->size; i++)
+ if (aop1->aopu.aop_reg[i] !=
+ aop2->aopu.aop_reg[i])
+ return FALSE;
- return TRUE ;
+ return TRUE;
}
/*-----------------------------------------------------------------*/
/* aopOp - allocates an asmop for an operand : */
/*-----------------------------------------------------------------*/
-static void aopOp (operand *op, iCode *ic, bool result)
+static void
+aopOp (operand * op, iCode * ic, bool result)
{
- asmop *aop;
- symbol *sym;
- int i;
+ asmop *aop;
+ symbol *sym;
+ int i;
- if (!op)
- return ;
+ if (!op)
+ return;
- /* if this a literal */
- if (IS_OP_LITERAL(op)) {
- op->aop = aop = newAsmop(AOP_LIT);
- aop->aopu.aop_lit = op->operand.valOperand;
- aop->size = getSize(operandType(op));
- return;
+ /* if this a literal */
+ if (IS_OP_LITERAL (op))
+ {
+ op->aop = aop = newAsmop (AOP_LIT);
+ aop->aopu.aop_lit = op->operand.valOperand;
+ aop->size = getSize (operandType (op));
+ return;
}
- /* if already has a asmop then continue */
- if (op->aop)
- return ;
+ /* if already has a asmop then continue */
+ if (op->aop )
+ return;
- /* if the underlying symbol has a aop */
- if (IS_SYMOP(op) && OP_SYMBOL(op)->aop) {
- op->aop = OP_SYMBOL(op)->aop;
- return;
+ /* if the underlying symbol has a aop */
+ if (IS_SYMOP (op) && OP_SYMBOL (op)->aop)
+ {
+ op->aop = OP_SYMBOL (op)->aop;
+ return;
}
- /* if this is a true symbol */
- if (IS_TRUE_SYMOP(op)) {
- op->aop = aopForSym(ic,OP_SYMBOL(op),result);
- return ;
+ /* if this is a true symbol */
+ if (IS_TRUE_SYMOP (op))
+ {
+ op->aop = aopForSym (ic, OP_SYMBOL (op), result);
+ return;
}
- /* this is a temporary : this has
- only four choices :
- a) register
- b) spillocation
- c) rematerialize
- d) conditional
- e) can be a return use only */
+ /* this is a temporary : this has
+ only four choices :
+ a) register
+ b) spillocation
+ c) rematerialize
+ d) conditional
+ e) can be a return use only */
- sym = OP_SYMBOL(op);
+ sym = OP_SYMBOL (op);
-
- /* if the type is a conditional */
- if (sym->regType == REG_CND) {
- aop = op->aop = sym->aop = newAsmop(AOP_CRY);
- aop->size = 0;
- return;
+ /* if the type is a conditional */
+ if (sym->regType == REG_CND)
+ {
+ aop = op->aop = sym->aop = newAsmop (AOP_CRY);
+ aop->size = 0;
+ return;
}
- /* if it is spilt then two situations
- a) is rematerialize
- b) has a spill location */
- if (sym->isspilt || sym->nRegs == 0) {
+ /* if it is spilt then two situations
+ a) is rematerialize
+ b) has a spill location */
+ if (sym->isspilt || sym->nRegs == 0)
+ {
- /* rematerialize it NOW */
- if (sym->remat) {
- sym->aop = op->aop = aop =
- aopForRemat (sym);
- aop->size = getSize(sym->type);
- return;
- }
+ /* rematerialize it NOW */
+ if (sym->remat)
+ {
+ sym->aop = op->aop = aop =
+ aopForRemat (sym);
+ aop->size = getSize (sym->type);
+ return;
+ }
- if (sym->accuse) {
- int i;
- aop = op->aop = sym->aop = newAsmop(AOP_ACC);
- aop->size = getSize(sym->type);
- for ( i = 0 ; i < 2 ; i++ )
- aop->aopu.aop_str[i] = accUse[i];
- return;
- }
-
- if (sym->ruonly ) {
- int i;
- aop = op->aop = sym->aop = newAsmop(AOP_STR);
- aop->size = getSize(sym->type);
- for ( i = 0 ; i < fReturnSize ; i++ )
- aop->aopu.aop_str[i] = fReturn[i];
- return;
- }
+ if (sym->accuse)
+ {
+ int i;
+ aop = op->aop = sym->aop = newAsmop (AOP_ACC);
+ aop->size = getSize (sym->type);
+ for (i = 0; i < 2; i++)
+ aop->aopu.aop_str[i] = accUse[i];
+ return;
+ }
+
+ if (sym->ruonly)
+ {
+ unsigned i;
+
+ aop = op->aop = sym->aop = newAsmop (AOP_STR);
+ aop->size = getSize (sym->type);
+ for (i = 0; i < fReturnSizeMCS51; i++)
+ aop->aopu.aop_str[i] = fReturn[i];
+ return;
+ }
- /* else spill location */
- sym->aop = op->aop = aop =
- aopForSym(ic,sym->usl.spillLoc,result);
- aop->size = getSize(sym->type);
- return;
+ if (sym->usl.spillLoc)
+ {
+ if (getSize(sym->type) != getSize(sym->usl.spillLoc->type))
+ {
+ /* force a new aop if sizes differ */
+ sym->usl.spillLoc->aop = NULL;
+ }
+ sym->aop = op->aop = aop =
+ aopForSym (ic, sym->usl.spillLoc, result);
+ aop->size = getSize (sym->type);
+ return;
+ }
+
+ /* else must be a dummy iTemp */
+ sym->aop = op->aop = aop = newAsmop (AOP_DUMMY);
+ aop->size = getSize (sym->type);
+ return;
}
- /* must be in a register */
- sym->aop = op->aop = aop = newAsmop(AOP_REG);
- aop->size = sym->nRegs;
- for ( i = 0 ; i < sym->nRegs ;i++)
- aop->aopu.aop_reg[i] = sym->regs[i];
+ /* must be in a register */
+ sym->aop = op->aop = aop = newAsmop (AOP_REG);
+ aop->size = sym->nRegs;
+ for (i = 0; i < sym->nRegs; i++)
+ aop->aopu.aop_reg[i] = sym->regs[i];
}
/*-----------------------------------------------------------------*/
/* freeAsmop - free up the asmop given to an operand */
/*----------------------------------------------------------------*/
-static void freeAsmop (operand *op, asmop *aaop, iCode *ic, bool pop)
-{
- asmop *aop ;
-
- if (!op)
- aop = aaop;
- else
- aop = op->aop;
-
- if (!aop)
- return ;
-
- if (aop->freed)
- goto dealloc;
-
- aop->freed = 1;
-
- /* depending on the asmop type only three cases need work AOP_RO
- , AOP_R1 && AOP_STK */
- switch (aop->type) {
- case AOP_R0 :
- if (_G.r0Pushed ) {
- if (pop) {
- emitcode ("pop","ar0");
- _G.r0Pushed--;
- }
- }
- bitVectUnSetBit(ic->rUsed,R0_IDX);
- break;
-
- case AOP_R1 :
- if (_G.r1Pushed ) {
- if (pop) {
- emitcode ("pop","ar1");
- _G.r1Pushed--;
- }
- }
- bitVectUnSetBit(ic->rUsed,R1_IDX);
- break;
+static void
+freeAsmop (operand * op, asmop * aaop, iCode * ic, bool pop)
+{
+ asmop *aop;
- case AOP_STK :
- {
- int sz = aop->size;
- int stk = aop->aopu.aop_stk + aop->size;
- bitVectUnSetBit(ic->rUsed,R0_IDX);
- bitVectUnSetBit(ic->rUsed,R1_IDX);
-
- getFreePtr(ic,&aop,FALSE);
- if (stk) {
- emitcode ("mov","a,_bp");
- emitcode ("add","a,#0x%02x",((char)stk) & 0xff);
- emitcode ("mov","%s,a",aop->aopu.aop_ptr->name);
- } else
- emitcode ("mov","%s,_bp",aop->aopu.aop_ptr->name);
-
- while (sz--) {
- emitcode("pop","acc");
- emitcode("mov","@%s,a",aop->aopu.aop_ptr->name);
- if (!sz) break;
- emitcode("dec","%s",aop->aopu.aop_ptr->name);
- }
- op->aop = aop;
- freeAsmop(op,NULL,ic,TRUE);
- if (_G.r0Pushed) {
- emitcode("pop","ar0");
- _G.r0Pushed--;
- }
+ if (!op)
+ aop = aaop;
+ else
+ aop = op->aop;
- if (_G.r1Pushed) {
- emitcode("pop","ar1");
- _G.r1Pushed--;
- }
- }
+ if (!aop)
+ return;
+
+ if (aop->freed)
+ goto dealloc;
+
+ aop->freed = 1;
+
+ /* depending on the asmop type only three cases need work AOP_RO
+ , AOP_R1 && AOP_STK */
+ switch (aop->type)
+ {
+ case AOP_R0:
+ if (_G.r0Pushed)
+ {
+ if (pop)
+ {
+ emitcode ("pop", "ar0");
+ _G.r0Pushed--;
+ }
+ }
+ bitVectUnSetBit (ic->rUsed, R0_IDX);
+ break;
+
+ case AOP_R1:
+ if (_G.r1Pushed)
+ {
+ if (pop)
+ {
+ emitcode ("pop", "ar1");
+ _G.r1Pushed--;
+ }
+ }
+ bitVectUnSetBit (ic->rUsed, R1_IDX);
+ break;
+
+ case AOP_STK:
+ {
+ int sz = aop->size;
+ int stk = aop->aopu.aop_stk + aop->size - 1;
+ bitVectUnSetBit (ic->rUsed, R0_IDX);
+ bitVectUnSetBit (ic->rUsed, R1_IDX);
+
+ getFreePtr (ic, &aop, FALSE);
+
+ if (stk)
+ {
+ emitcode ("mov", "a,_bp");
+ emitcode ("add", "a,#0x%02x", ((char) stk) & 0xff);
+ emitcode ("mov", "%s,a", aop->aopu.aop_ptr->name);
+ }
+ else
+ {
+ emitcode ("mov", "%s,_bp", aop->aopu.aop_ptr->name);
+ }
+
+ while (sz--)
+ {
+ emitcode ("pop", "acc");
+ emitcode ("mov", "@%s,a", aop->aopu.aop_ptr->name);
+ if (!sz)
+ break;
+ emitcode ("dec", "%s", aop->aopu.aop_ptr->name);
+ }
+ op->aop = aop;
+ freeAsmop (op, NULL, ic, TRUE);
+ if (_G.r1Pushed)
+ {
+ emitcode ("pop", "ar1");
+ _G.r1Pushed--;
+ }
+
+ if (_G.r0Pushed)
+ {
+ emitcode ("pop", "ar0");
+ _G.r0Pushed--;
+ }
+ }
}
dealloc:
- /* all other cases just dealloc */
- if (op ) {
- op->aop = NULL;
- if (IS_SYMOP(op)) {
- OP_SYMBOL(op)->aop = NULL;
- /* if the symbol has a spill */
- if (SPIL_LOC(op))
- SPIL_LOC(op)->aop = NULL;
- }
+ /* all other cases just dealloc */
+ if (op)
+ {
+ op->aop = NULL;
+ if (IS_SYMOP (op))
+ {
+ OP_SYMBOL (op)->aop = NULL;
+ /* if the symbol has a spill */
+ if (SPIL_LOC (op))
+ SPIL_LOC (op)->aop = NULL;
+ }
}
}
/*-----------------------------------------------------------------*/
-/* aopGet - for fetching value of the aop */
+/* aopGetUsesAcc - indicates ahead of time whether aopGet() will */
+/* clobber the accumulator */
/*-----------------------------------------------------------------*/
-static char *aopGet (asmop *aop, int offset, bool bit16, bool dname)
+static bool
+aopGetUsesAcc (asmop *aop, int offset)
{
- char *s = buffer ;
- char *rs;
+ if (offset > (aop->size - 1))
+ return FALSE;
- /* offset is greater than
- size then zero */
- if (offset > (aop->size - 1) &&
- aop->type != AOP_LIT)
- return zero;
+ switch (aop->type)
+ {
- /* depending on type */
- switch (aop->type) {
-
case AOP_R0:
case AOP_R1:
- /* if we need to increment it */
- while (offset > aop->coff) {
- emitcode ("inc","%s",aop->aopu.aop_ptr->name);
- aop->coff++;
- }
-
- while (offset < aop->coff) {
- emitcode("dec","%s",aop->aopu.aop_ptr->name);
- aop->coff--;
- }
-
- aop->coff = offset ;
- if (aop->paged) {
- emitcode("movx","a,@%s",aop->aopu.aop_ptr->name);
- return (dname ? "acc" : "a");
- }
- sprintf(s,"@%s",aop->aopu.aop_ptr->name);
- ALLOC_ATOMIC(rs,strlen(s)+1);
- strcpy(rs,s);
- return rs;
-
+ if (aop->paged)
+ return TRUE;
+ return FALSE;
case AOP_DPTR:
- while (offset > aop->coff) {
- emitcode ("inc","dptr");
- aop->coff++;
- }
-
- while (offset < aop->coff) {
- emitcode("lcall","__decdptr");
- aop->coff--;
- }
-
- aop->coff = offset;
- if (aop->code) {
- emitcode("clr","a");
- emitcode("movc","a,@a+dptr");
- }
- else
- emitcode("movx","a,@dptr");
- return (dname ? "acc" : "a");
-
-
+ return TRUE;
case AOP_IMMD:
- if (bit16)
- sprintf (s,"#(%s)",aop->aopu.aop_immd);
- else
- if (offset)
- sprintf(s,"#(%s >> %d)",
- aop->aopu.aop_immd,
- offset*8);
- else
- sprintf(s,"#%s",
- aop->aopu.aop_immd);
- ALLOC_ATOMIC(rs,strlen(s)+1);
- strcpy(rs,s);
- return rs;
-
+ return FALSE;
case AOP_DIR:
- if (offset)
- sprintf(s,"(%s + %d)",
- aop->aopu.aop_dir,
- offset);
- else
- sprintf(s,"%s",aop->aopu.aop_dir);
- ALLOC_ATOMIC(rs,strlen(s)+1);
- strcpy(rs,s);
- return rs;
-
+ return FALSE;
case AOP_REG:
- if (dname)
- return aop->aopu.aop_reg[offset]->dname;
- else
- return aop->aopu.aop_reg[offset]->name;
-
+ wassert(strcmp(aop->aopu.aop_reg[offset]->name, "a"));
+ return FALSE;
case AOP_CRY:
- emitcode("clr","a");
- emitcode("mov","c,%s",aop->aopu.aop_dir);
- emitcode("rlc","a") ;
- return (dname ? "acc" : "a");
-
+ return TRUE;
case AOP_ACC:
- if (!offset && dname)
- return "acc";
- return aop->aopu.aop_str[offset];
-
+ return TRUE;
case AOP_LIT:
- return aopLiteral (aop->aopu.aop_lit,offset);
-
+ return FALSE;
case AOP_STR:
- aop->coff = offset ;
- if (strcmp(aop->aopu.aop_str[offset],"a") == 0 &&
- dname)
- return "acc";
-
- return aop->aopu.aop_str[offset];
-
+ if (strcmp (aop->aopu.aop_str[offset], "a") == 0)
+ return TRUE;
+ return FALSE;
+ case AOP_DUMMY:
+ return FALSE;
+ default:
+ /* Error case --- will have been caught already */
+ wassert(0);
+ return FALSE;
}
-
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopget got unsupported aop->type");
- exit(0);
}
+
/*-----------------------------------------------------------------*/
-/* aopPut - puts a string for a aop */
+/* aopGet - for fetching value of the aop */
/*-----------------------------------------------------------------*/
-static void aopPut (asmop *aop, char *s, int offset)
+static char *
+aopGet (asmop * aop, int offset, bool bit16, bool dname)
{
- char *d = buffer ;
- symbol *lbl ;
+ char *s = buffer;
+ char *rs;
- if (aop->size && offset > ( aop->size - 1)) {
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopPut got offset > aop->size");
- exit(0);
- }
+ /* offset is greater than
+ size then zero */
+ if (offset > (aop->size - 1) &&
+ aop->type != AOP_LIT)
+ return zero;
- /* will assign value to value */
- /* depending on where it is ofcourse */
- switch (aop->type) {
- case AOP_DIR:
- if (offset)
- sprintf(d,"(%s + %d)",
- aop->aopu.aop_dir,offset);
- else
- sprintf(d,"%s",aop->aopu.aop_dir);
-
- if (strcmp(d,s))
- emitcode("mov","%s,%s",d,s);
-
- break;
-
- case AOP_REG:
- if (strcmp(aop->aopu.aop_reg[offset]->name,s) != 0 &&
- strcmp(aop->aopu.aop_reg[offset]->dname,s)!= 0){
- if (*s == '@' ||
- strcmp(s,"r0") == 0 ||
- strcmp(s,"r1") == 0 ||
- strcmp(s,"r2") == 0 ||
- strcmp(s,"r3") == 0 ||
- strcmp(s,"r4") == 0 ||
- strcmp(s,"r5") == 0 ||
- strcmp(s,"r6") == 0 ||
- strcmp(s,"r7") == 0 )
- emitcode("mov","%s,%s",
- aop->aopu.aop_reg[offset]->dname,s);
- else
- emitcode("mov","%s,%s",
- aop->aopu.aop_reg[offset]->name,s);
- }
- break;
-
- case AOP_DPTR:
- if (aop->code) {
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopPut writting to code space");
- exit(0);
- }
-
- while (offset > aop->coff) {
- aop->coff++;
- emitcode ("inc","dptr");
- }
-
- while (offset < aop->coff) {
- aop->coff-- ;
- emitcode("lcall","__decdptr");
- }
-
- aop->coff = offset;
-
- /* if not in accumulater */
- MOVA(s);
-
- emitcode ("movx","@dptr,a");
- break;
-
+ /* depending on type */
+ switch (aop->type)
+ {
+ case AOP_DUMMY:
+ return zero;
+
case AOP_R0:
case AOP_R1:
- while (offset > aop->coff) {
- aop->coff++;
- emitcode("inc","%s",aop->aopu.aop_ptr->name);
- }
- while (offset < aop->coff) {
- aop->coff-- ;
- emitcode ("dec","%s",aop->aopu.aop_ptr->name);
- }
- aop->coff = offset;
-
- if (aop->paged) {
- MOVA(s);
- emitcode("movx","@%s,a",aop->aopu.aop_ptr->name);
-
- } else
- if (*s == '@') {
- MOVA(s);
- emitcode("mov","@%s,a",aop->aopu.aop_ptr->name);
- } else
- if (strcmp(s,"r0") == 0 ||
- strcmp(s,"r1") == 0 ||
- strcmp(s,"r2") == 0 ||
- strcmp(s,"r3") == 0 ||
- strcmp(s,"r4") == 0 ||
- strcmp(s,"r5") == 0 ||
- strcmp(s,"r6") == 0 ||
- strcmp(s,"r7") == 0 ) {
- char buffer[10];
- sprintf(buffer,"a%s",s);
- emitcode("mov","@%s,%s",
- aop->aopu.aop_ptr->name,buffer);
- } else
- emitcode("mov","@%s,%s",aop->aopu.aop_ptr->name,s);
-
- break;
-
- case AOP_STK:
- if (strcmp(s,"a") == 0)
- emitcode("push","acc");
- else
- emitcode("push","%s",s);
-
- break;
-
- case AOP_CRY:
- /* if bit variable */
- if (!aop->aopu.aop_dir) {
- emitcode("clr","a");
- emitcode("rlc","a");
- } else {
- if (s == zero)
- emitcode("clr","%s",aop->aopu.aop_dir);
- else
- if (s == one)
- emitcode("setb","%s",aop->aopu.aop_dir);
- else
- if (!strcmp(s,"c"))
- emitcode("mov","%s,c",aop->aopu.aop_dir);
- else {
- lbl = newiTempLabel(NULL);
-
- if (strcmp(s,"a")) {
- MOVA(s);
- }
- emitcode("cjne","a,#0x01,%05d$",lbl->key+100);
- emitcode("","%05d$:",lbl->key+100);
- emitcode("cpl","c");
- emitcode("mov","%s,c",aop->aopu.aop_dir);
- }
+ /* if we need to increment it */
+ while (offset > aop->coff)
+ {
+ emitcode ("inc", "%s", aop->aopu.aop_ptr->name);
+ aop->coff++;
}
- break;
-
- case AOP_STR:
- aop->coff = offset;
- if (strcmp(aop->aopu.aop_str[offset],s))
- emitcode ("mov","%s,%s",aop->aopu.aop_str[offset],s);
- break;
-
- case AOP_ACC:
- aop->coff = offset;
- if (!offset && (strcmp(s,"acc") == 0))
- break;
-
- if (strcmp(aop->aopu.aop_str[offset],s))
- emitcode ("mov","%s,%s",aop->aopu.aop_str[offset],s);
- break;
- default :
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopPut got unsupported aop->type");
- exit(0);
- }
-
-}
+ while (offset < aop->coff)
+ {
+ emitcode ("dec", "%s", aop->aopu.aop_ptr->name);
+ aop->coff--;
+ }
+ aop->coff = offset;
+ if (aop->paged)
+ {
+ emitcode ("movx", "a,@%s", aop->aopu.aop_ptr->name);
+ return (dname ? "acc" : "a");
+ }
+ sprintf (s, "@%s", aop->aopu.aop_ptr->name);
+ rs = Safe_calloc (1, strlen (s) + 1);
+ strcpy (rs, s);
+ return rs;
-#if 0
-/*-----------------------------------------------------------------*/
-/* pointToEnd :- points to the last byte of the operand */
-/*-----------------------------------------------------------------*/
-static void pointToEnd (asmop *aop)
-{
- int count ;
- if (!aop)
- return ;
+ case AOP_DPTR:
+ if (aop->code && aop->coff==0 && offset>=1) {
+ emitcode ("mov", "a,#0x%02x", offset);
+ emitcode ("movc", "a,@a+dptr");
+ return (dname ? "acc" : "a");
+ }
- aop->coff = count = (aop->size - 1);
- switch (aop->type) {
- case AOP_R0 :
- case AOP_R1 :
- while (count--)
- emitcode("inc","%s",aop->aopu.aop_ptr->name);
- break;
- case AOP_DPTR :
- while (count--)
- emitcode("inc","dptr");
- break;
- }
+ while (offset > aop->coff)
+ {
+ emitcode ("inc", "dptr");
+ aop->coff++;
+ }
-}
-#endif
+ while (offset < aop->coff)
+ {
+ emitcode ("lcall", "__decdptr");
+ aop->coff--;
+ }
-/*-----------------------------------------------------------------*/
-/* reAdjustPreg - points a register back to where it should */
-/*-----------------------------------------------------------------*/
-static void reAdjustPreg (asmop *aop)
-{
- int size ;
+ aop->coff = offset;
+ if (aop->code)
+ {
+ emitcode ("clr", "a");
+ emitcode ("movc", "a,@a+dptr");
+ }
+ else
+ {
+ emitcode ("movx", "a,@dptr");
+ }
+ return (dname ? "acc" : "a");
- aop->coff = 0;
- if ((size = aop->size) <= 1)
- return ;
- size-- ;
- switch (aop->type) {
- case AOP_R0 :
- case AOP_R1 :
- while (size--)
- emitcode("dec","%s",aop->aopu.aop_ptr->name);
- break;
- case AOP_DPTR :
- while (size--)
- emitcode("lcall","__decdptr");
- break;
- }
+ case AOP_IMMD:
+ if (aop->aopu.aop_immd.from_cast_remat && (offset == (aop->size-1))) {
+ sprintf(s,"%s",aop->aopu.aop_immd.aop_immd2);
+ } else if (bit16)
+ sprintf (s, "#%s", aop->aopu.aop_immd.aop_immd1);
+ else if (offset)
+ sprintf (s, "#(%s >> %d)",
+ aop->aopu.aop_immd.aop_immd1,
+ offset * 8);
+ else
+ sprintf (s, "#%s",
+ aop->aopu.aop_immd.aop_immd1);
+ rs = Safe_calloc (1, strlen (s) + 1);
+ strcpy (rs, s);
+ return rs;
-}
+ case AOP_DIR:
+ if (offset)
+ sprintf (s, "(%s + %d)",
+ aop->aopu.aop_dir,
+ offset);
+ else
+ sprintf (s, "%s", aop->aopu.aop_dir);
+ rs = Safe_calloc (1, strlen (s) + 1);
+ strcpy (rs, s);
+ return rs;
-#define AOP(op) op->aop
-#define AOP_TYPE(op) AOP(op)->type
-#define AOP_SIZE(op) AOP(op)->size
-#define IS_AOP_PREG(x) (AOP(x) && (AOP_TYPE(x) == AOP_R1 || \
- AOP_TYPE(x) == AOP_R0))
+ case AOP_REG:
+ if (dname)
+ return aop->aopu.aop_reg[offset]->dname;
+ else
+ return aop->aopu.aop_reg[offset]->name;
-#define AOP_NEEDSACC(x) (AOP(x) && (AOP_TYPE(x) == AOP_CRY || \
- AOP_TYPE(x) == AOP_DPTR || AOP(x)->paged))
+ case AOP_CRY:
+ emitcode ("clr", "a");
+ emitcode ("mov", "c,%s", aop->aopu.aop_dir);
+ emitcode ("rlc", "a");
+ return (dname ? "acc" : "a");
-#define AOP_INPREG(x) (x && (x->type == AOP_REG && \
- (x->aopu.aop_reg[0] == mcs51_regWithIdx(R0_IDX) || \
- x->aopu.aop_reg[0] == mcs51_regWithIdx(R1_IDX) )))
+ case AOP_ACC:
+ if (!offset && dname)
+ return "acc";
+ return aop->aopu.aop_str[offset];
-/*-----------------------------------------------------------------*/
-/* genNotFloat - generates not for float operations */
-/*-----------------------------------------------------------------*/
-static void genNotFloat (operand *op, operand *res)
-{
- int size, offset;
- char *l;
- symbol *tlbl ;
+ case AOP_LIT:
+ return aopLiteral (aop->aopu.aop_lit, offset);
- /* we will put 127 in the first byte of
- the result */
- aopPut(AOP(res),"#127",0);
- size = AOP_SIZE(op) - 1;
- offset = 1;
+ case AOP_STR:
+ aop->coff = offset;
+ if (strcmp (aop->aopu.aop_str[offset], "a") == 0 &&
+ dname)
+ return "acc";
- l = aopGet(op->aop,offset++,FALSE,FALSE);
- MOVA(l);
+ return aop->aopu.aop_str[offset];
- while(size--) {
- emitcode("orl","a,%s",
- aopGet(op->aop,
- offset++,FALSE,FALSE));
}
- tlbl = newiTempLabel(NULL);
- tlbl = newiTempLabel(NULL);
- aopPut(res->aop,one,1);
- emitcode("jz","%05d$",(tlbl->key+100));
- aopPut(res->aop,zero,1);
- emitcode("","%05d$:",(tlbl->key+100));
-
- size = res->aop->size - 2;
- offset = 2;
- /* put zeros in the rest */
- while (size--)
- aopPut(res->aop,zero,offset++);
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopget got unsupported aop->type");
+ exit (1);
}
-
/*-----------------------------------------------------------------*/
-/* opIsGptr: returns non-zero if the passed operand is */
-/* a generic pointer type. */
-/*-----------------------------------------------------------------*/
-static int opIsGptr(operand *op)
+/* aopPut - puts a string for a aop */
+/*-----------------------------------------------------------------*/
+static void
+aopPut (asmop * aop, const char *s, int offset, bool bvolatile)
{
- link *type = operandType(op);
-
- if ((AOP_SIZE(op) == GPTRSIZE) && IS_GENPTR(type))
+ char *d = buffer;
+
+ if (aop->size && offset > (aop->size - 1))
{
- return 1;
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopPut got offset > aop->size");
+ exit (1);
}
- return 0;
-}
-/*-----------------------------------------------------------------*/
-/* getDataSize - get the operand data size */
-/*-----------------------------------------------------------------*/
-static int getDataSize(operand *op)
-{
- int size;
- size = AOP_SIZE(op);
- if (size == GPTRSIZE)
+ /* will assign value to value */
+ /* depending on where it is ofcourse */
+ switch (aop->type)
{
- link *type = operandType(op);
- if (IS_GENPTR(type))
- {
- /* generic pointer; arithmetic operations
- * should ignore the high byte (pointer type).
- */
- size--;
- }
- }
- return size;
-}
+ case AOP_DUMMY:
+ MOVA (s); /* read s in case it was volatile */
+ break;
+
+ case AOP_DIR:
+ if (offset)
+ sprintf (d, "(%s + %d)",
+ aop->aopu.aop_dir, offset);
+ else
+ sprintf (d, "%s", aop->aopu.aop_dir);
-/*-----------------------------------------------------------------*/
-/* outAcc - output Acc */
-/*-----------------------------------------------------------------*/
-static void outAcc(operand *result)
-{
- int size, offset;
- size = getDataSize(result);
- if(size){
- aopPut(AOP(result),"a",0);
- size--;
- offset = 1;
- /* unsigned or positive */
- while(size--){
- aopPut(AOP(result),zero,offset++);
- }
- }
-}
+ if (strcmp (d, s) ||
+ bvolatile)
+ emitcode ("mov", "%s,%s", d, s);
-/*-----------------------------------------------------------------*/
-/* outBitC - output a bit C */
-/*-----------------------------------------------------------------*/
-static void outBitC(operand *result)
-{
- /* if the result is bit */
- if (AOP_TYPE(result) == AOP_CRY)
- aopPut(AOP(result),"c",0);
- else {
- emitcode("clr","a");
- emitcode("rlc","a");
- outAcc(result);
- }
-}
+ break;
-/*-----------------------------------------------------------------*/
-/* toBoolean - emit code for orl a,operator(sizeop) */
-/*-----------------------------------------------------------------*/
-static void toBoolean(operand *oper)
-{
- int size = AOP_SIZE(oper) - 1;
- int offset = 1;
- MOVA(aopGet(AOP(oper),0,FALSE,FALSE));
- while (size--)
- emitcode("orl","a,%s",aopGet(AOP(oper),offset++,FALSE,FALSE));
-}
+ case AOP_REG:
+ if (strcmp (aop->aopu.aop_reg[offset]->name, s) != 0 &&
+ strcmp (aop->aopu.aop_reg[offset]->dname, s) != 0)
+ {
+ if (*s == '@' ||
+ strcmp (s, "r0") == 0 ||
+ strcmp (s, "r1") == 0 ||
+ strcmp (s, "r2") == 0 ||
+ strcmp (s, "r3") == 0 ||
+ strcmp (s, "r4") == 0 ||
+ strcmp (s, "r5") == 0 ||
+ strcmp (s, "r6") == 0 ||
+ strcmp (s, "r7") == 0)
+ emitcode ("mov", "%s,%s",
+ aop->aopu.aop_reg[offset]->dname, s);
+ else
+ emitcode ("mov", "%s,%s",
+ aop->aopu.aop_reg[offset]->name, s);
+ }
+ break;
+ case AOP_DPTR:
+ if (aop->code)
+ {
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopPut writing to code space");
+ exit (1);
+ }
-/*-----------------------------------------------------------------*/
-/* genNot - generate code for ! operation */
-/*-----------------------------------------------------------------*/
-static void genNot (iCode *ic)
-{
- symbol *tlbl;
- link *optype = operandType(IC_LEFT(ic));
+ while (offset > aop->coff)
+ {
+ aop->coff++;
+ emitcode ("inc", "dptr");
+ }
- /* assign asmOps to operand & result */
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
+ while (offset < aop->coff)
+ {
+ aop->coff--;
+ emitcode ("lcall", "__decdptr");
+ }
- /* if in bit space then a special case */
- if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY) {
- emitcode("mov","c,%s",IC_LEFT(ic)->aop->aopu.aop_dir);
- emitcode("cpl","c");
- outBitC(IC_RESULT(ic));
- goto release;
- }
+ aop->coff = offset;
- /* if type float then do float */
- if (IS_FLOAT(optype)) {
- genNotFloat(IC_LEFT(ic),IC_RESULT(ic));
- goto release;
- }
+ /* if not in accumulater */
+ MOVA (s);
- toBoolean(IC_LEFT(ic));
+ emitcode ("movx", "@dptr,a");
+ break;
- tlbl = newiTempLabel(NULL);
- emitcode("cjne","a,#0x01,%05d$",tlbl->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- outBitC(IC_RESULT(ic));
+ case AOP_R0:
+ case AOP_R1:
+ while (offset > aop->coff)
+ {
+ aop->coff++;
+ emitcode ("inc", "%s", aop->aopu.aop_ptr->name);
+ }
+ while (offset < aop->coff)
+ {
+ aop->coff--;
+ emitcode ("dec", "%s", aop->aopu.aop_ptr->name);
+ }
+ aop->coff = offset;
-release:
- /* release the aops */
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? 0 : 1));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
-}
+ if (aop->paged)
+ {
+ MOVA (s);
+ emitcode ("movx", "@%s,a", aop->aopu.aop_ptr->name);
+ }
+ else if (*s == '@')
+ {
+ MOVA (s);
+ emitcode ("mov", "@%s,a", aop->aopu.aop_ptr->name);
+ }
+ else if (strcmp (s, "r0") == 0 ||
+ strcmp (s, "r1") == 0 ||
+ strcmp (s, "r2") == 0 ||
+ strcmp (s, "r3") == 0 ||
+ strcmp (s, "r4") == 0 ||
+ strcmp (s, "r5") == 0 ||
+ strcmp (s, "r6") == 0 ||
+ strcmp (s, "r7") == 0)
+ {
+ char buffer[10];
+ sprintf (buffer, "a%s", s);
+ emitcode ("mov", "@%s,%s",
+ aop->aopu.aop_ptr->name, buffer);
+ }
+ else
+ emitcode ("mov", "@%s,%s", aop->aopu.aop_ptr->name, s);
-/*-----------------------------------------------------------------*/
-/* genCpl - generate code for complement */
-/*-----------------------------------------------------------------*/
-static void genCpl (iCode *ic)
-{
- int offset = 0;
- int size ;
+ break;
+
+ case AOP_STK:
+ if (strcmp (s, "a") == 0)
+ emitcode ("push", "acc");
+ else
+ if (*s=='@') {
+ MOVA(s);
+ emitcode ("push", "acc");
+ } else {
+ emitcode ("push", s);
+ }
+
+ break;
+ case AOP_CRY:
+ /* if bit variable */
+ if (!aop->aopu.aop_dir)
+ {
+ emitcode ("clr", "a");
+ emitcode ("rlc", "a");
+ }
+ else
+ {
+ if (s == zero)
+ emitcode ("clr", "%s", aop->aopu.aop_dir);
+ else if (s == one)
+ emitcode ("setb", "%s", aop->aopu.aop_dir);
+ else if (!strcmp (s, "c"))
+ emitcode ("mov", "%s,c", aop->aopu.aop_dir);
+ else
+ {
+ if (strcmp (s, "a"))
+ {
+ MOVA (s);
+ }
+ {
+ /* set C, if a >= 1 */
+ emitcode ("add", "a,#0xff");
+ emitcode ("mov", "%s,c", aop->aopu.aop_dir);
+ }
+ }
+ }
+ break;
- /* assign asmOps to operand & result */
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
+ case AOP_STR:
+ aop->coff = offset;
+ if (strcmp (aop->aopu.aop_str[offset], s) ||
+ bvolatile)
+ emitcode ("mov", "%s,%s", aop->aopu.aop_str[offset], s);
+ break;
- /* if both are in bit space then
- a special case */
- if (AOP_TYPE(IC_RESULT(ic)) == AOP_CRY &&
- AOP_TYPE(IC_LEFT(ic)) == AOP_CRY ) {
+ case AOP_ACC:
+ aop->coff = offset;
+ if (!offset && (strcmp (s, "acc") == 0) &&
+ !bvolatile)
+ break;
- emitcode("mov","c,%s",IC_LEFT(ic)->aop->aopu.aop_dir);
- emitcode("cpl","c");
- emitcode("mov","%s,c",IC_RESULT(ic)->aop->aopu.aop_dir);
- goto release;
- }
+ if (strcmp (aop->aopu.aop_str[offset], s) &&
+ !bvolatile)
+ emitcode ("mov", "%s,%s", aop->aopu.aop_str[offset], s);
+ break;
- size = AOP_SIZE(IC_RESULT(ic));
- while (size--) {
- char *l = aopGet(AOP(IC_LEFT(ic)),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("cpl","a");
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
+ default:
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopPut got unsupported aop->type");
+ exit (1);
}
-
-release:
- /* release the aops */
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? 0 : 1));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
}
+
+#if 0
/*-----------------------------------------------------------------*/
-/* genUminusFloat - unary minus for floating points */
+/* pointToEnd :- points to the last byte of the operand */
/*-----------------------------------------------------------------*/
-static void genUminusFloat(operand *op,operand *result)
+static void
+pointToEnd (asmop * aop)
{
- int size ,offset =0 ;
- char *l;
- /* for this we just need to flip the
- first it then copy the rest in place */
- size = AOP_SIZE(op) - 1;
- l = aopGet(AOP(op),3,FALSE,FALSE);
-
- MOVA(l);
+ int count;
+ if (!aop)
+ return;
- emitcode("cpl","acc.7");
- aopPut(AOP(result),"a",3);
+ aop->coff = count = (aop->size - 1);
+ switch (aop->type)
+ {
+ case AOP_R0:
+ case AOP_R1:
+ while (count--)
+ emitcode ("inc", "%s", aop->aopu.aop_ptr->name);
+ break;
+ case AOP_DPTR:
+ while (count--)
+ emitcode ("inc", "dptr");
+ break;
+ }
- while(size--) {
- aopPut(AOP(result),
- aopGet(AOP(op),offset,FALSE,FALSE),
- offset);
- offset++;
- }
}
+#endif
/*-----------------------------------------------------------------*/
-/* genUminus - unary minus code generation */
+/* reAdjustPreg - points a register back to where it should */
/*-----------------------------------------------------------------*/
-static void genUminus (iCode *ic)
-{
- int offset ,size ;
- link *optype, *rtype;
-
-
- /* assign asmops */
- aopOp(IC_LEFT(ic),ic,FALSE);
- aopOp(IC_RESULT(ic),ic,TRUE);
-
- /* if both in bit space then special
- case */
- if (AOP_TYPE(IC_RESULT(ic)) == AOP_CRY &&
- AOP_TYPE(IC_LEFT(ic)) == AOP_CRY ) {
-
- emitcode("mov","c,%s",IC_LEFT(ic)->aop->aopu.aop_dir);
- emitcode("cpl","c");
- emitcode("mov","%s,c",IC_RESULT(ic)->aop->aopu.aop_dir);
- goto release;
- }
-
- optype = operandType(IC_LEFT(ic));
- rtype = operandType(IC_RESULT(ic));
-
- /* if float then do float stuff */
- if (IS_FLOAT(optype)) {
- genUminusFloat(IC_LEFT(ic),IC_RESULT(ic));
- goto release;
- }
-
- /* otherwise subtract from zero */
- size = AOP_SIZE(IC_LEFT(ic));
- offset = 0 ;
- CLRC ;
- while(size--) {
- char *l = aopGet(AOP(IC_LEFT(ic)),offset,FALSE,FALSE);
- if (!strcmp(l,"a")) {
- emitcode("cpl","a");
- emitcode("inc","a");
- } else {
- emitcode("clr","a");
- emitcode("subb","a,%s",l);
- }
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
- }
-
- /* if any remaining bytes in the result */
- /* we just need to propagate the sign */
- if ((size = (AOP_SIZE(IC_RESULT(ic)) - AOP_SIZE(IC_LEFT(ic))))) {
- emitcode("rlc","a");
- emitcode("subb","a,acc");
- while (size--)
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
- }
+static void
+reAdjustPreg (asmop * aop)
+{
+ if ((aop->coff==0) || aop->size <= 1)
+ return;
-release:
- /* release the aops */
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? 0 : 1));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
+ switch (aop->type)
+ {
+ case AOP_R0:
+ case AOP_R1:
+ while (aop->coff--)
+ emitcode ("dec", "%s", aop->aopu.aop_ptr->name);
+ break;
+ case AOP_DPTR:
+ while (aop->coff--)
+ {
+ emitcode ("lcall", "__decdptr");
+ }
+ break;
+ }
+ aop->coff = 0;
}
-/*-----------------------------------------------------------------*/
-/* saveRegisters - will look for a call and save the registers */
-/*-----------------------------------------------------------------*/
-static void saveRegisters(iCode *lic)
-{
- int i;
- iCode *ic;
- bitVect *rsave;
- link *detype;
-
- /* look for call */
- for (ic = lic ; ic ; ic = ic->next)
- if (ic->op == CALL || ic->op == PCALL)
- break;
-
- if (!ic) {
- fprintf(stderr,"found parameter push with no function call\n");
- return ;
- }
-
- /* if the registers have been saved already then
- do nothing */
- if (ic->regsSaved || (OP_SYMBOL(IC_LEFT(ic))->calleeSave))
- return ;
-
- /* find the registers in use at this time
- and push them away to safety */
- rsave = bitVectCplAnd(bitVectCopy(ic->rMask),
- ic->rUsed);
-
- ic->regsSaved = 1;
- if (options.useXstack) {
- if (bitVectBitValue(rsave,R0_IDX))
- emitcode("mov","b,r0");
- emitcode("mov","r0,%s",spname);
- for (i = 0 ; i < mcs51_nRegs ; i++) {
- if (bitVectBitValue(rsave,i)) {
- if (i == R0_IDX)
- emitcode("mov","a,b");
- else
- emitcode("mov","a,%s",mcs51_regWithIdx(i)->name);
- emitcode("movx","@r0,a");
- emitcode("inc","r0");
- }
- }
- emitcode("mov","%s,r0",spname);
- if (bitVectBitValue(rsave,R0_IDX))
- emitcode("mov","r0,b");
- } else
- for (i = 0 ; i < mcs51_nRegs ; i++) {
- if (bitVectBitValue(rsave,i))
- emitcode("push","%s",mcs51_regWithIdx(i)->dname);
- }
+#define AOP(op) op->aop
+#define AOP_TYPE(op) AOP(op)->type
+#define AOP_SIZE(op) AOP(op)->size
+#define IS_AOP_PREG(x) (AOP(x) && (AOP_TYPE(x) == AOP_R1 || \
+ AOP_TYPE(x) == AOP_R0))
- detype = getSpec(operandType(IC_LEFT(ic)));
- if (detype &&
- (SPEC_BANK(currFunc->etype) != SPEC_BANK(detype)) &&
- IS_ISR(currFunc->etype) &&
- !ic->bankSaved)
+#define AOP_NEEDSACC(x) (AOP(x) && (AOP_TYPE(x) == AOP_CRY || \
+ AOP_TYPE(x) == AOP_DPTR || AOP(x)->paged))
+
+#define AOP_INPREG(x) (x && (x->type == AOP_REG && \
+ (x->aopu.aop_reg[0] == mcs51_regWithIdx(R0_IDX) || \
+ x->aopu.aop_reg[0] == mcs51_regWithIdx(R1_IDX) )))
- saverbank(SPEC_BANK(detype),ic,TRUE);
-}
/*-----------------------------------------------------------------*/
-/* unsaveRegisters - pop the pushed registers */
+/* opIsGptr: returns non-zero if the passed operand is */
+/* a generic pointer type. */
/*-----------------------------------------------------------------*/
-static void unsaveRegisters (iCode *ic)
+static int
+opIsGptr (operand * op)
{
- int i;
- bitVect *rsave;
- /* find the registers in use at this time
- and push them away to safety */
- rsave = bitVectCplAnd(bitVectCopy(ic->rMask),
- ic->rUsed);
-
- if (options.useXstack) {
- emitcode("mov","r0,%s",spname);
- for (i = mcs51_nRegs ; i >= 0 ; i--) {
- if (bitVectBitValue(rsave,i)) {
- emitcode("dec","r0");
- emitcode("movx","a,@r0");
- if (i == R0_IDX)
- emitcode("mov","b,a");
- else
- emitcode("mov","%s,a",mcs51_regWithIdx(i)->name);
- }
-
- }
- emitcode("mov","%s,r0",spname);
- if (bitVectBitValue(rsave,R0_IDX))
- emitcode("mov","r0,b");
- } else
- for (i = mcs51_nRegs ; i >= 0 ; i--) {
- if (bitVectBitValue(rsave,i))
- emitcode("pop","%s",mcs51_regWithIdx(i)->dname);
- }
-
-}
+ sym_link *type = operandType (op);
+ if ((AOP_SIZE (op) == GPTRSIZE) && IS_GENPTR (type))
+ {
+ return 1;
+ }
+ return 0;
+}
/*-----------------------------------------------------------------*/
-/* pushSide - */
+/* getDataSize - get the operand data size */
/*-----------------------------------------------------------------*/
-static void pushSide(operand * oper, int size)
+static int
+getDataSize (operand * op)
{
- int offset = 0;
- while (size--) {
- char *l = aopGet(AOP(oper),offset++,FALSE,TRUE);
- if (AOP_TYPE(oper) != AOP_REG &&
- AOP_TYPE(oper) != AOP_DIR &&
- strcmp(l,"a") ) {
- emitcode("mov","a,%s",l);
- emitcode("push","acc");
- } else
- emitcode("push","%s",l);
+ int size;
+ size = AOP_SIZE (op);
+ if (size == GPTRSIZE)
+ {
+ sym_link *type = operandType (op);
+ if (IS_GENPTR (type))
+ {
+ /* generic pointer; arithmetic operations
+ * should ignore the high byte (pointer type).
+ */
+ size--;
}
+ }
+ return size;
}
/*-----------------------------------------------------------------*/
-/* assignResultValue - */
+/* outAcc - output Acc */
/*-----------------------------------------------------------------*/
-static void assignResultValue(operand * oper)
+static void
+outAcc (operand * result)
{
- int offset = 0;
- int size = AOP_SIZE(oper);
- while (size--) {
- aopPut(AOP(oper),fReturn[offset],offset);
- offset++;
+ int size, offset;
+ size = getDataSize (result);
+ if (size)
+ {
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ size--;
+ offset = 1;
+ /* unsigned or positive */
+ while (size--)
+ {
+ aopPut (AOP (result), zero, offset++, isOperandVolatile (result, FALSE));
}
+ }
}
+/*-----------------------------------------------------------------*/
+/* outBitC - output a bit C */
+/*-----------------------------------------------------------------*/
+static void
+outBitC (operand * result)
+{
+ /* if the result is bit */
+ if (AOP_TYPE (result) == AOP_CRY)
+ aopPut (AOP (result), "c", 0, isOperandVolatile (result, FALSE));
+ else
+ {
+ emitcode ("clr", "a");
+ emitcode ("rlc", "a");
+ outAcc (result);
+ }
+}
/*-----------------------------------------------------------------*/
-/* genXpush - pushes onto the external stack */
+/* toBoolean - emit code for orl a,operator(sizeop) */
/*-----------------------------------------------------------------*/
-static void genXpush (iCode *ic)
+static void
+toBoolean (operand * oper)
{
- asmop *aop = newAsmop(0);
- regs *r ;
- int size,offset = 0;
+ int size = AOP_SIZE (oper) - 1;
+ int offset = 1;
+ MOVA (aopGet (AOP (oper), 0, FALSE, FALSE));
+ while (size--)
+ emitcode ("orl", "a,%s", aopGet (AOP (oper), offset++, FALSE, FALSE));
+}
- aopOp(IC_LEFT(ic),ic,FALSE);
- r = getFreePtr(ic,&aop,FALSE);
-
- emitcode("mov","%s,_spx",r->name);
+/*-----------------------------------------------------------------*/
+/* genNot - generate code for ! operation */
+/*-----------------------------------------------------------------*/
+static void
+genNot (iCode * ic)
+{
+ symbol *tlbl;
- size = AOP_SIZE(IC_LEFT(ic));
- while(size--) {
+ D(emitcode ("; genNot",""));
- char *l = aopGet(AOP(IC_LEFT(ic)),
- offset++,FALSE,FALSE);
- MOVA(l);
- emitcode("movx","@%s,a",r->name);
- emitcode("inc","%s",r->name);
+ /* assign asmOps to operand & result */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
+ /* if in bit space then a special case */
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", IC_LEFT (ic)->aop->aopu.aop_dir);
+ emitcode ("cpl", "c");
+ outBitC (IC_RESULT (ic));
+ goto release;
}
-
- emitcode("mov","_spx,%s",r->name);
+ toBoolean (IC_LEFT (ic));
- freeAsmop(NULL,aop,ic,TRUE);
- freeAsmop(IC_LEFT(ic),NULL,ic,TRUE);
+ tlbl = newiTempLabel (NULL);
+ emitcode ("cjne", "a,#0x01,%05d$", tlbl->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitC (IC_RESULT (ic));
+
+release:
+ /* release the aops */
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? 0 : 1));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
+
/*-----------------------------------------------------------------*/
-/* genIpush - genrate code for pushing this gets a little complex */
+/* genCpl - generate code for complement */
/*-----------------------------------------------------------------*/
-static void genIpush (iCode *ic)
+static void
+genCpl (iCode * ic)
{
- int size, offset = 0 ;
- char *l;
+ int offset = 0;
+ int size;
+ symbol *tlbl;
+ D(emitcode ("; genCpl",""));
- /* if this is not a parm push : ie. it is spill push
- and spill push is always done on the local stack */
- if (!ic->parmPush) {
+ /* assign asmOps to operand & result */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
- /* and the item is spilt then do nothing */
- if (OP_SYMBOL(IC_LEFT(ic))->isspilt)
- return ;
+ /* special case if in bit space */
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY)
+ {
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", IC_LEFT (ic)->aop->aopu.aop_dir);
+ emitcode ("cpl", "c");
+ emitcode ("mov", "%s,c", IC_RESULT (ic)->aop->aopu.aop_dir);
+ goto release;
+ }
- aopOp(IC_LEFT(ic),ic,FALSE);
- size = AOP_SIZE(IC_LEFT(ic));
- /* push it on the stack */
- while(size--) {
- l = aopGet(AOP(IC_LEFT(ic)),offset++,FALSE,TRUE);
- if (*l == '#') {
- MOVA(l);
- l = "acc";
- }
- emitcode("push","%s",l);
- }
- return ;
+ tlbl=newiTempLabel(NULL);
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_ACC ||
+ AOP_TYPE (IC_LEFT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_LEFT (ic)))
+ {
+ emitcode ("cjne", "%s,#0x01,%05d$",
+ aopGet (AOP (IC_LEFT (ic)), 0, FALSE, FALSE),
+ tlbl->key + 100);
+ }
+ else
+ {
+ char *l = aopGet (AOP (IC_LEFT (ic)), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("cjne", "a,#0x01,%05d$", tlbl->key + 100);
+ }
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitC (IC_RESULT(ic));
+ goto release;
}
- /* this is a paramter push: in this case we call
- the routine to find the call and save those
- registers that need to be saved */
- saveRegisters(ic);
-
- /* if use external stack then call the external
- stack pushing routine */
- if (options.useXstack) {
- genXpush(ic);
- return ;
+ size = AOP_SIZE (IC_RESULT (ic));
+ while (size--)
+ {
+ char *l = aopGet (AOP (IC_LEFT (ic)), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("cpl", "a");
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
}
- /* then do the push */
- aopOp(IC_LEFT(ic),ic,FALSE);
-
- // pushSide(IC_LEFT(ic), AOP_SIZE(IC_LEFT(ic)));
- size = AOP_SIZE(IC_LEFT(ic));
-
- while (size--) {
- l = aopGet(AOP(IC_LEFT(ic)),offset++,FALSE,TRUE);
- if (AOP_TYPE(IC_LEFT(ic)) != AOP_REG &&
- AOP_TYPE(IC_LEFT(ic)) != AOP_DIR &&
- strcmp(l,"a") ) {
- emitcode("mov","a,%s",l);
- emitcode("push","acc");
- } else
- emitcode("push","%s",l);
- }
-
- freeAsmop(IC_LEFT(ic),NULL,ic,TRUE);
+release:
+ /* release the aops */
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? 0 : 1));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genIpop - recover the registers: can happen only for spilling */
+/* genUminusFloat - unary minus for floating points */
/*-----------------------------------------------------------------*/
-static void genIpop (iCode *ic)
+static void
+genUminusFloat (operand * op, operand * result)
{
- int size,offset ;
+ int size, offset = 0;
+ char *l;
+
+ D(emitcode ("; genUminusFloat",""));
+
+ /* for this we just copy and then flip the bit */
+ size = AOP_SIZE (op) - 1;
- /* if the temp was not pushed then */
- if (OP_SYMBOL(IC_LEFT(ic))->isspilt)
- return ;
+ while (size--)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (op), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ offset++;
+ }
- aopOp(IC_LEFT(ic),ic,FALSE);
- size = AOP_SIZE(IC_LEFT(ic));
- offset = (size-1);
- while (size--)
- emitcode("pop","%s",aopGet(AOP(IC_LEFT(ic)),offset--,
- FALSE,TRUE));
+ l = aopGet (AOP (op), offset, FALSE, FALSE);
- freeAsmop(IC_LEFT(ic),NULL,ic,TRUE);
+ MOVA (l);
+
+ emitcode ("cpl", "acc.7");
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
-/* unsaverbank - restores the resgister bank from stack */
+/* genUminus - unary minus code generation */
/*-----------------------------------------------------------------*/
-static void unsaverbank (int bank,iCode *ic,bool popPsw)
+static void
+genUminus (iCode * ic)
{
- int i;
- asmop *aop ;
- regs *r = NULL;
+ int offset, size;
+ sym_link *optype, *rtype;
- if (popPsw) {
- if (options.useXstack) {
- aop = newAsmop(0);
- r = getFreePtr(ic,&aop,FALSE);
-
-
- emitcode("mov","%s,_spx",r->name);
- emitcode("movx","a,@%s",r->name);
- emitcode("mov","psw,a");
- emitcode("dec","%s",r->name);
-
- }else
- emitcode ("pop","psw");
+
+ D(emitcode ("; genUminus",""));
+
+ /* assign asmops */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
+
+ /* if both in bit space then special
+ case */
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY &&
+ AOP_TYPE (IC_LEFT (ic)) == AOP_CRY)
+ {
+
+ emitcode ("mov", "c,%s", IC_LEFT (ic)->aop->aopu.aop_dir);
+ emitcode ("cpl", "c");
+ emitcode ("mov", "%s,c", IC_RESULT (ic)->aop->aopu.aop_dir);
+ goto release;
}
- for (i = (mcs51_nRegs - 1) ; i >= 0 ;i--) {
- if (options.useXstack) {
- emitcode("movx","a,@%s",r->name);
- emitcode("mov","(%s+%d),a",
- regs8051[i].base,8*bank+regs8051[i].offset);
- emitcode("dec","%s",r->name);
+ optype = operandType (IC_LEFT (ic));
+ rtype = operandType (IC_RESULT (ic));
- } else
- emitcode("pop","(%s+%d)",
- regs8051[i].base,8*bank+regs8051[i].offset);
+ /* if float then do float stuff */
+ if (IS_FLOAT (optype))
+ {
+ genUminusFloat (IC_LEFT (ic), IC_RESULT (ic));
+ goto release;
}
- if (options.useXstack) {
+ /* otherwise subtract from zero */
+ size = AOP_SIZE (IC_LEFT (ic));
+ offset = 0;
+ //CLRC ;
+ while (size--)
+ {
+ char *l = aopGet (AOP (IC_LEFT (ic)), offset, FALSE, FALSE);
+ if (!strcmp (l, "a"))
+ {
+ if (offset == 0)
+ SETC;
+ emitcode ("cpl", "a");
+ emitcode ("addc", "a,#0");
+ }
+ else
+ {
+ if (offset == 0)
+ CLRC;
+ emitcode ("clr", "a");
+ emitcode ("subb", "a,%s", l);
+ }
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
- emitcode("mov","_spx,%s",r->name);
- freeAsmop(NULL,aop,ic,TRUE);
+ /* if any remaining bytes in the result */
+ /* we just need to propagate the sign */
+ if ((size = (AOP_SIZE (IC_RESULT (ic)) - AOP_SIZE (IC_LEFT (ic)))))
+ {
+ emitcode ("rlc", "a");
+ emitcode ("subb", "a,acc");
+ while (size--)
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
- }
+release:
+ /* release the aops */
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? 0 : 1));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* saverbank - saves an entire register bank on the stack */
+/* saveRegisters - will look for a call and save the registers */
/*-----------------------------------------------------------------*/
-static void saverbank (int bank, iCode *ic, bool pushPsw)
+static void
+saveRegisters (iCode * lic)
{
- int i;
- asmop *aop ;
- regs *r = NULL;
-
- if (options.useXstack) {
+ int i;
+ iCode *ic;
+ bitVect *rsave;
- aop = newAsmop(0);
- r = getFreePtr(ic,&aop,FALSE);
- emitcode("mov","%s,_spx",r->name);
+ /* look for call */
+ for (ic = lic; ic; ic = ic->next)
+ if (ic->op == CALL || ic->op == PCALL)
+ break;
+ if (!ic)
+ {
+ fprintf (stderr, "found parameter push with no function call\n");
+ return;
}
- for (i = 0 ; i < mcs51_nRegs ;i++) {
- if (options.useXstack) {
- emitcode("inc","%s",r->name);
- emitcode("mov","a,(%s+%d)",
- regs8051[i].base,8*bank+regs8051[i].offset);
- emitcode("movx","@%s,a",r->name);
- } else
- emitcode("push","(%s+%d)",
- regs8051[i].base,8*bank+regs8051[i].offset);
- }
-
- if (pushPsw) {
- if (options.useXstack) {
- emitcode("mov","a,psw");
- emitcode("movx","@%s,a",r->name);
- emitcode("inc","%s",r->name);
- emitcode("mov","_spx,%s",r->name);
- freeAsmop (NULL,aop,ic,TRUE);
-
- } else
- emitcode("push","psw");
-
- emitcode("mov","psw,#0x%02x",(bank << 3)&0x00ff);
- }
- ic->bankSaved = 1;
+ /* if the registers have been saved already or don't need to be then
+ do nothing */
+ if (ic->regsSaved)
+ return;
+ if (IS_SYMOP(IC_LEFT(ic)) &&
+ (IFFUNC_CALLEESAVES(OP_SYMBOL(IC_LEFT(ic))->type) ||
+ IFFUNC_ISNAKED(OP_SYM_TYPE(IC_LEFT (ic)))))
+ return;
+
+ /* safe the registers in use at this time but skip the
+ ones for the result */
+ rsave = bitVectCplAnd (bitVectCopy (ic->rMask),
+ mcs51_rUmaskForOp (IC_RESULT(ic)));
+ ic->regsSaved = 1;
+ if (options.useXstack)
+ {
+ if (bitVectBitValue (rsave, R0_IDX))
+ emitcode ("mov", "b,r0");
+ emitcode ("mov", "r0,%s", spname);
+ for (i = 0; i < mcs51_nRegs; i++)
+ {
+ if (bitVectBitValue (rsave, i))
+ {
+ if (i == R0_IDX)
+ emitcode ("mov", "a,b");
+ else
+ emitcode ("mov", "a,%s", mcs51_regWithIdx (i)->name);
+ emitcode ("movx", "@r0,a");
+ emitcode ("inc", "r0");
+ }
+ }
+ emitcode ("mov", "%s,r0", spname);
+ if (bitVectBitValue (rsave, R0_IDX))
+ emitcode ("mov", "r0,b");
+ }
+ else
+ for (i = 0; i < mcs51_nRegs; i++)
+ {
+ if (bitVectBitValue (rsave, i))
+ emitcode ("push", "%s", mcs51_regWithIdx (i)->dname);
+ }
}
/*-----------------------------------------------------------------*/
-/* genCall - generates a call statement */
+/* unsaveRegisters - pop the pushed registers */
/*-----------------------------------------------------------------*/
-static void genCall (iCode *ic)
-{
- link *detype;
-
- /* if caller saves & we have not saved then */
- if (!ic->regsSaved)
- saveRegisters(ic);
-
- /* if we are calling a function that is not using
- the same register bank then we need to save the
- destination registers on the stack */
- detype = getSpec(operandType(IC_LEFT(ic)));
- if (detype &&
- (SPEC_BANK(currFunc->etype) != SPEC_BANK(detype)) &&
- IS_ISR(currFunc->etype) &&
- !ic->bankSaved)
-
- saverbank(SPEC_BANK(detype),ic,TRUE);
-
- /* if send set is not empty the assign */
- if (_G.sendSet) {
- iCode *sic ;
-
- for (sic = setFirstItem(_G.sendSet) ; sic ;
- sic = setNextItem(_G.sendSet)) {
- int size, offset = 0;
- aopOp(IC_LEFT(sic),sic,FALSE);
- size = AOP_SIZE(IC_LEFT(sic));
- while (size--) {
- char *l = aopGet(AOP(IC_LEFT(sic)),offset,
- FALSE,FALSE);
- if (strcmp(l,fReturn[offset]))
- emitcode("mov","%s,%s",
- fReturn[offset],
- l);
- offset++;
+static void
+unsaveRegisters (iCode * ic)
+{
+ int i;
+ bitVect *rsave;
+
+ /* restore the registers in use at this time but skip the
+ ones for the result */
+ rsave = bitVectCplAnd (bitVectCopy (ic->rMask),
+ mcs51_rUmaskForOp (IC_RESULT(ic)));
+
+ if (options.useXstack)
+ {
+ emitcode ("mov", "r0,%s", spname);
+ for (i = mcs51_nRegs; i >= 0; i--)
+ {
+ if (bitVectBitValue (rsave, i))
+ {
+ emitcode ("dec", "r0");
+ emitcode ("movx", "a,@r0");
+ if (i == R0_IDX)
+ emitcode ("mov", "b,a");
+ else
+ emitcode ("mov", "%s,a", mcs51_regWithIdx (i)->name);
}
- freeAsmop (IC_LEFT(sic),NULL,sic,TRUE);
+
}
- _G.sendSet = NULL;
+ emitcode ("mov", "%s,r0", spname);
+ if (bitVectBitValue (rsave, R0_IDX))
+ emitcode ("mov", "r0,b");
}
- /* make the call */
- emitcode("lcall","%s",(OP_SYMBOL(IC_LEFT(ic))->rname[0] ?
- OP_SYMBOL(IC_LEFT(ic))->rname :
- OP_SYMBOL(IC_LEFT(ic))->name));
+ else
+ for (i = mcs51_nRegs; i >= 0; i--)
+ {
+ if (bitVectBitValue (rsave, i))
+ emitcode ("pop", "%s", mcs51_regWithIdx (i)->dname);
+ }
- /* if we need assign a result value */
- if ((IS_ITEMP(IC_RESULT(ic)) &&
- (OP_SYMBOL(IC_RESULT(ic))->nRegs ||
- OP_SYMBOL(IC_RESULT(ic))->spildir )) ||
- IS_TRUE_SYMOP(IC_RESULT(ic)) ) {
+}
- _G.accInUse++;
- aopOp(IC_RESULT(ic),ic,FALSE);
- _G.accInUse--;
- assignResultValue(IC_RESULT(ic));
-
- freeAsmop(IC_RESULT(ic),NULL, ic,TRUE);
+/*-----------------------------------------------------------------*/
+/* pushSide - */
+/*-----------------------------------------------------------------*/
+static void
+pushSide (operand * oper, int size)
+{
+ int offset = 0;
+ while (size--)
+ {
+ char *l = aopGet (AOP (oper), offset++, FALSE, TRUE);
+ if (AOP_TYPE (oper) != AOP_REG &&
+ AOP_TYPE (oper) != AOP_DIR &&
+ strcmp (l, "a"))
+ {
+ emitcode ("mov", "a,%s", l);
+ emitcode ("push", "acc");
+ }
+ else
+ emitcode ("push", "%s", l);
}
+}
- /* adjust the stack for parameters if
- required */
- if (IC_LEFT(ic)->parmBytes) {
- int i;
- if (IC_LEFT(ic)->parmBytes > 3) {
- emitcode("mov","a,%s",spname);
- emitcode("add","a,#0x%02x", (- IC_LEFT(ic)->parmBytes) & 0xff);
- emitcode("mov","%s,a",spname);
- } else
- for ( i = 0 ; i < IC_LEFT(ic)->parmBytes ;i++)
- emitcode("dec","%s",spname);
-
+/*-----------------------------------------------------------------*/
+/* assignResultValue - */
+/*-----------------------------------------------------------------*/
+static void
+assignResultValue (operand * oper)
+{
+ int offset = 0;
+ int size = AOP_SIZE (oper);
+ while (size--)
+ {
+ aopPut (AOP (oper), fReturn[offset], offset, isOperandVolatile (oper, FALSE));
+ offset++;
}
-
- /* if register bank was saved then pop them */
- if (ic->bankSaved)
- unsaverbank(SPEC_BANK(detype),ic,TRUE);
-
- /* if we hade saved some registers then unsave them */
- if (ic->regsSaved && !(OP_SYMBOL(IC_LEFT(ic))->calleeSave))
- unsaveRegisters (ic);
-
-
}
+
/*-----------------------------------------------------------------*/
-/* genPcall - generates a call by pointer statement */
+/* genXpush - pushes onto the external stack */
/*-----------------------------------------------------------------*/
-static void genPcall (iCode *ic)
+static void
+genXpush (iCode * ic)
{
- link *detype;
- symbol *rlbl = newiTempLabel(NULL);
+ asmop *aop = newAsmop (0);
+ regs *r;
+ int size, offset = 0;
+ D(emitcode ("; genXpush",""));
- /* if caller saves & we have not saved then */
- if (!ic->regsSaved)
- saveRegisters(ic);
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ r = getFreePtr (ic, &aop, FALSE);
- /* if we are calling a function that is not using
- the same register bank then we need to save the
- destination registers on the stack */
- detype = getSpec(operandType(IC_LEFT(ic)));
- if (detype &&
- IS_ISR(currFunc->etype) &&
- (SPEC_BANK(currFunc->etype) != SPEC_BANK(detype)))
- saverbank(SPEC_BANK(detype),ic,TRUE);
+ emitcode ("mov", "%s,_spx", r->name);
- /* push the return address on to the stack */
- emitcode("mov","a,#%05d$",(rlbl->key+100));
- emitcode("push","acc");
- emitcode("mov","a,#(%05d$ >> 8)",(rlbl->key+100));
- emitcode("push","acc");
-
- if (options.model == MODEL_FLAT24)
+ size = AOP_SIZE (IC_LEFT (ic));
+ while (size--)
{
- emitcode("mov","a,#(%05d$ >> 16)",(rlbl->key+100));
- emitcode("push","acc");
- }
- /* now push the calling address */
- aopOp(IC_LEFT(ic),ic,FALSE);
+ char *l = aopGet (AOP (IC_LEFT (ic)),
+ offset++, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("movx", "@%s,a", r->name);
+ emitcode ("inc", "%s", r->name);
- pushSide(IC_LEFT(ic), FPTRSIZE);
+ }
- freeAsmop(IC_LEFT(ic),NULL,ic,TRUE);
- /* if send set is not empty the assign */
- if (_G.sendSet) {
- iCode *sic ;
+ emitcode ("mov", "_spx,%s", r->name);
- for (sic = setFirstItem(_G.sendSet) ; sic ;
- sic = setNextItem(_G.sendSet)) {
- int size, offset = 0;
- aopOp(IC_LEFT(sic),sic,FALSE);
- size = AOP_SIZE(IC_LEFT(sic));
- while (size--) {
- char *l = aopGet(AOP(IC_LEFT(sic)),offset,
- FALSE,FALSE);
- if (strcmp(l,fReturn[offset]))
- emitcode("mov","%s,%s",
- fReturn[offset],
- l);
- offset++;
- }
- freeAsmop (IC_LEFT(sic),NULL,sic,TRUE);
- }
- _G.sendSet = NULL;
- }
+ freeAsmop (NULL, aop, ic, TRUE);
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
+}
- emitcode("ret","");
- emitcode("","%05d$:",(rlbl->key+100));
+/*-----------------------------------------------------------------*/
+/* genIpush - genrate code for pushing this gets a little complex */
+/*-----------------------------------------------------------------*/
+static void
+genIpush (iCode * ic)
+{
+ int size, offset = 0;
+ char *l;
+ D(emitcode ("; genIpush",""));
- /* if we need assign a result value */
- if ((IS_ITEMP(IC_RESULT(ic)) &&
- (OP_SYMBOL(IC_RESULT(ic))->nRegs ||
- OP_SYMBOL(IC_RESULT(ic))->spildir)) ||
- IS_TRUE_SYMOP(IC_RESULT(ic)) ) {
+ /* if this is not a parm push : ie. it is spill push
+ and spill push is always done on the local stack */
+ if (!ic->parmPush)
+ {
- _G.accInUse++;
- aopOp(IC_RESULT(ic),ic,FALSE);
- _G.accInUse--;
-
- assignResultValue(IC_RESULT(ic));
+ /* and the item is spilt then do nothing */
+ if (OP_SYMBOL (IC_LEFT (ic))->isspilt)
+ return;
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ size = AOP_SIZE (IC_LEFT (ic));
+ /* push it on the stack */
+ while (size--)
+ {
+ l = aopGet (AOP (IC_LEFT (ic)), offset++, FALSE, TRUE);
+ if (*l == '#')
+ {
+ MOVA (l);
+ l = "acc";
+ }
+ emitcode ("push", "%s", l);
+ }
+ return;
}
- /* adjust the stack for parameters if
- required */
- if (IC_LEFT(ic)->parmBytes) {
- int i;
- if (IC_LEFT(ic)->parmBytes > 3) {
- emitcode("mov","a,%s",spname);
- emitcode("add","a,#0x%02x", (- IC_LEFT(ic)->parmBytes) & 0xff);
- emitcode("mov","%s,a",spname);
- } else
- for ( i = 0 ; i < IC_LEFT(ic)->parmBytes ;i++)
- emitcode("dec","%s",spname);
+ /* this is a paramter push: in this case we call
+ the routine to find the call and save those
+ registers that need to be saved */
+ saveRegisters (ic);
+ /* if use external stack then call the external
+ stack pushing routine */
+ if (options.useXstack)
+ {
+ genXpush (ic);
+ return;
}
- /* if register bank was saved then unsave them */
- if (detype &&
- (SPEC_BANK(currFunc->etype) !=
- SPEC_BANK(detype)))
- unsaverbank(SPEC_BANK(detype),ic,TRUE);
+ /* then do the push */
+ aopOp (IC_LEFT (ic), ic, FALSE);
- /* if we hade saved some registers then
- unsave them */
- if (ic->regsSaved)
- unsaveRegisters (ic);
-}
-
-/*-----------------------------------------------------------------*/
-/* resultRemat - result is rematerializable */
-/*-----------------------------------------------------------------*/
-static int resultRemat (iCode *ic)
-{
- if (SKIP_IC(ic) || ic->op == IFX)
- return 0;
+ // pushSide(IC_LEFT(ic), AOP_SIZE(IC_LEFT(ic)));
+ size = AOP_SIZE (IC_LEFT (ic));
- if (IC_RESULT(ic) && IS_ITEMP(IC_RESULT(ic))) {
- symbol *sym = OP_SYMBOL(IC_RESULT(ic));
- if (sym->remat && !POINTER_SET(ic))
- return 1;
+ while (size--)
+ {
+ l = aopGet (AOP (IC_LEFT (ic)), offset++, FALSE, TRUE);
+ if (AOP_TYPE (IC_LEFT (ic)) != AOP_REG &&
+ AOP_TYPE (IC_LEFT (ic)) != AOP_DIR &&
+ strcmp (l, "a"))
+ {
+ emitcode ("mov", "a,%s", l);
+ emitcode ("push", "acc");
+ }
+ else
+ emitcode ("push", "%s", l);
}
- return 0;
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* inExcludeList - return 1 if the string is in exclude Reg list */
+/* genIpop - recover the registers: can happen only for spilling */
/*-----------------------------------------------------------------*/
-static bool inExcludeList(char *s)
+static void
+genIpop (iCode * ic)
{
- int i =0;
-
- if (options.excludeRegs[i] &&
- strcasecmp(options.excludeRegs[i],"none") == 0)
- return FALSE ;
+ int size, offset;
- for ( i = 0 ; options.excludeRegs[i]; i++) {
- if (options.excludeRegs[i] &&
- strcasecmp(s,options.excludeRegs[i]) == 0)
- return TRUE;
- }
- return FALSE ;
+ D(emitcode ("; genIpop",""));
+
+ /* if the temp was not pushed then */
+ if (OP_SYMBOL (IC_LEFT (ic))->isspilt)
+ return;
+
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ size = AOP_SIZE (IC_LEFT (ic));
+ offset = (size - 1);
+ while (size--)
+ emitcode ("pop", "%s", aopGet (AOP (IC_LEFT (ic)), offset--,
+ FALSE, TRUE));
+
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genFunction - generated code for function entry */
+/* unsaveRBank - restores the resgister bank from stack */
/*-----------------------------------------------------------------*/
-static void genFunction (iCode *ic)
-{
- symbol *sym;
- link *fetype;
-
- _G.nRegsSaved = 0;
- /* create the function header */
- emitcode(";","-----------------------------------------");
- emitcode(";"," function %s",(sym = OP_SYMBOL(IC_LEFT(ic)))->name);
- emitcode(";","-----------------------------------------");
-
- emitcode("","%s:",sym->rname);
- fetype = getSpec(operandType(IC_LEFT(ic)));
-
- /* if critical function then turn interrupts off */
- if (SPEC_CRTCL(fetype))
- emitcode("clr","ea");
-
- /* here we need to generate the equates for the
- register bank if required */
- if (SPEC_BANK(fetype) != rbank) {
- int i ;
-
- rbank = SPEC_BANK(fetype);
- for ( i = 0 ; i < mcs51_nRegs ; i++ ) {
- if (strcmp(regs8051[i].base,"0") == 0)
- emitcode("","%s = 0x%02x",
- regs8051[i].dname,
- 8*rbank+regs8051[i].offset);
- else
- emitcode ("","%s = %s + 0x%02x",
- regs8051[i].dname,
- regs8051[i].base,
- 8*rbank+regs8051[i].offset);
- }
+static void
+unsaveRBank (int bank, iCode * ic, bool popPsw)
+{
+ int i;
+ asmop *aop = NULL;
+ regs *r = NULL;
+
+ if (options.useXstack)
+ {
+ if (!ic)
+ {
+ /* Assume r0 is available for use. */
+ r = mcs51_regWithIdx (R0_IDX);;
+ }
+ else
+ {
+ aop = newAsmop (0);
+ r = getFreePtr (ic, &aop, FALSE);
+ }
+ emitcode ("mov", "%s,_spx", r->name);
+ }
+
+ if (popPsw)
+ {
+ if (options.useXstack)
+ {
+ emitcode ("movx", "a,@%s", r->name);
+ emitcode ("mov", "psw,a");
+ emitcode ("dec", "%s", r->name);
+ }
+ else
+ {
+ emitcode ("pop", "psw");
+ }
}
- /* if this is an interrupt service routine then
- save acc, b, dpl, dph */
- if (IS_ISR(sym->etype)) {
-
- if (!inExcludeList("acc"))
- emitcode ("push","acc");
- if (!inExcludeList("b"))
- emitcode ("push","b");
- if (!inExcludeList("dpl"))
- emitcode ("push","dpl");
- if (!inExcludeList("dph"))
- emitcode ("push","dph");
- if (options.model == MODEL_FLAT24 && !inExcludeList("dpx"))
- emitcode ("push", "dpx");
- /* if this isr has no bank i.e. is going to
- run with bank 0 , then we need to save more
- registers :-) */
- if (!SPEC_BANK(sym->etype)) {
-
- /* if this function does not call any other
- function then we can be economical and
- save only those registers that are used */
- if (! sym->hasFcall) {
- int i;
-
- /* if any registers used */
- if (sym->regsUsed) {
- /* save the registers used */
- for ( i = 0 ; i < sym->regsUsed->size ; i++) {
- if (bitVectBitValue(sym->regsUsed,i) ||
- (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)) )
- emitcode("push","%s",mcs51_regWithIdx(i)->dname);
- }
- }
-
- } else {
- /* this function has a function call cannot
- determines register usage so we will have the
- entire bank */
- saverbank(0,ic,FALSE);
- }
- }
- } else {
- /* if callee-save to be used for this function
- then save the registers being used in this function */
- if (sym->calleeSave) {
- int i;
-
- /* if any registers used */
- if (sym->regsUsed) {
- /* save the registers used */
- for ( i = 0 ; i < sym->regsUsed->size ; i++) {
- if (bitVectBitValue(sym->regsUsed,i) ||
- (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)) ) {
- emitcode("push","%s",mcs51_regWithIdx(i)->dname);
- _G.nRegsSaved++;
- }
- }
- }
+ for (i = (mcs51_nRegs - 1); i >= 0; i--)
+ {
+ if (options.useXstack)
+ {
+ emitcode ("movx", "a,@%s", r->name);
+ emitcode ("mov", "(%s+%d),a",
+ regs8051[i].base, 8 * bank + regs8051[i].offset);
+ emitcode ("dec", "%s", r->name);
+
}
+ else
+ emitcode ("pop", "(%s+%d)",
+ regs8051[i].base, 8 * bank + regs8051[i].offset);
}
- /* set the register bank to the desired value */
- if (SPEC_BANK(sym->etype) || IS_ISR(sym->etype)) {
- emitcode("push","psw");
- emitcode("mov","psw,#0x%02x",(SPEC_BANK(sym->etype) << 3)&0x00ff);
+ if (options.useXstack)
+ {
+ emitcode ("mov", "_spx,%s", r->name);
}
+
+ if (aop)
+ {
+ freeAsmop (NULL, aop, ic, TRUE);
+ }
+}
- if (IS_RENT(sym->etype) || options.stackAuto) {
+/*-----------------------------------------------------------------*/
+/* saveRBank - saves an entire register bank on the stack */
+/*-----------------------------------------------------------------*/
+static void
+saveRBank (int bank, iCode * ic, bool pushPsw)
+{
+ int i;
+ asmop *aop = NULL;
+ regs *r = NULL;
- if (options.useXstack) {
- emitcode("mov","r0,%s",spname);
- emitcode("mov","a,_bp");
- emitcode("movx","@r0,a");
- emitcode("inc","%s",spname);
+ if (options.useXstack)
+ {
+ if (!ic)
+ {
+ /* Assume r0 is available for use. */
+ r = mcs51_regWithIdx (R0_IDX);;
+ }
+ else
+ {
+ aop = newAsmop (0);
+ r = getFreePtr (ic, &aop, FALSE);
+ }
+ emitcode ("mov", "%s,_spx", r->name);
+ }
+
+ for (i = 0; i < mcs51_nRegs; i++)
+ {
+ if (options.useXstack)
+ {
+ emitcode ("inc", "%s", r->name);
+ emitcode ("mov", "a,(%s+%d)",
+ regs8051[i].base, 8 * bank + regs8051[i].offset);
+ emitcode ("movx", "@%s,a", r->name);
}
- else
- /* set up the stack */
- emitcode ("push","_bp"); /* save the callers stack */
- emitcode ("mov","_bp,%s",spname);
+ else
+ emitcode ("push", "(%s+%d)",
+ regs8051[i].base, 8 * bank + regs8051[i].offset);
}
- /* adjust the stack for the function */
- if (sym->stack) {
-
- int i = sym->stack;
- if (i > 256 )
- werror(W_STACK_OVERFLOW,sym->name);
-
- if (i > 3 && sym->recvSize < 4) {
+ if (pushPsw)
+ {
+ if (options.useXstack)
+ {
+ emitcode ("mov", "a,psw");
+ emitcode ("movx", "@%s,a", r->name);
+ emitcode ("inc", "%s", r->name);
+ emitcode ("mov", "_spx,%s", r->name);
- emitcode ("mov","a,sp");
- emitcode ("add","a,#0x%02x",((char)sym->stack & 0xff));
- emitcode ("mov","sp,a");
-
}
- else
- while(i--)
- emitcode("inc","sp");
- }
+ else
+ {
+ emitcode ("push", "psw");
+ }
- if (sym->xstack) {
+ emitcode ("mov", "psw,#0x%02x", (bank << 3) & 0x00ff);
+ }
- emitcode ("mov","a,_spx");
- emitcode ("add","a,#0x%02x",((char)sym->xstack & 0xff));
- emitcode ("mov","_spx,a");
- }
+ if (aop)
+ {
+ freeAsmop (NULL, aop, ic, TRUE);
+ }
+ if (ic)
+ {
+ ic->bankSaved = 1;
+ }
}
/*-----------------------------------------------------------------*/
-/* genEndFunction - generates epilogue for functions */
+/* genSend - gen code for SEND */
/*-----------------------------------------------------------------*/
-static void genEndFunction (iCode *ic)
+static void genSend(set *sendSet)
{
- symbol *sym = OP_SYMBOL(IC_LEFT(ic));
-
- if (IS_RENT(sym->etype) || options.stackAuto)
- emitcode ("mov","%s,_bp",spname);
-
- /* if use external stack but some variables were
- added to the local stack then decrement the
- local stack */
- if (options.useXstack && sym->stack) {
- emitcode("mov","a,sp");
- emitcode("add","a,#0x%02x",((char)-sym->stack) & 0xff);
- emitcode("mov","sp,a");
+ iCode *sic;
+ int rb1_count = 0 ;
+
+ for (sic = setFirstItem (_G.sendSet); sic;
+ sic = setNextItem (_G.sendSet)) {
+ int size, offset = 0;
+ aopOp (IC_LEFT (sic), sic, FALSE);
+ size = AOP_SIZE (IC_LEFT (sic));
+
+ if (sic->argreg == 1) {
+ while (size--) {
+ char *l = aopGet (AOP (IC_LEFT (sic)), offset,
+ FALSE, FALSE);
+ if (strcmp (l, fReturn[offset]))
+ emitcode ("mov", "%s,%s", fReturn[offset], l);
+ offset++;
+ }
+ rb1_count = 0;
+ } else {
+ while (size--) {
+ emitcode ("mov","b1_%d,%s",rb1_count++,
+ aopGet (AOP (IC_LEFT (sic)), offset++,FALSE, FALSE));
+ }
+ }
+ freeAsmop (IC_LEFT (sic), NULL, sic, TRUE);
}
+}
+
+/*-----------------------------------------------------------------*/
+/* genCall - generates a call statement */
+/*-----------------------------------------------------------------*/
+static void
+genCall (iCode * ic)
+{
+ sym_link *dtype;
+// bool restoreBank = FALSE;
+ bool swapBanks = FALSE;
+ D(emitcode("; genCall",""));
- if ((IS_RENT(sym->etype) || options.stackAuto)) {
- if (options.useXstack) {
- emitcode("mov","r0,%s",spname);
- emitcode("movx","a,@r0");
- emitcode("mov","_bp,a");
- emitcode("dec","%s",spname);
+ dtype = operandType (IC_LEFT (ic));
+ /* if send set is not empty the assign */
+ if (_G.sendSet)
+ {
+ if (IFFUNC_ISREENT(dtype)) { /* need to reverse the send set */
+ genSend(reverseSet(_G.sendSet));
+ } else {
+ genSend(_G.sendSet);
}
- else
- emitcode ("pop","_bp");
- }
- /* restore the register bank */
- if (SPEC_BANK(sym->etype) || IS_ISR(sym->etype))
- emitcode ("pop","psw");
+ _G.sendSet = NULL;
+ }
+
+ /* if we are calling a not _naked function that is not using
+ the same register bank then we need to save the
+ destination registers on the stack */
+ dtype = operandType (IC_LEFT (ic));
+ if (currFunc && dtype && !IFFUNC_ISNAKED(dtype) &&
+ (FUNC_REGBANK (currFunc->type) != FUNC_REGBANK (dtype)) &&
+ !IFFUNC_ISISR (dtype))
+ {
+ swapBanks = TRUE;
+ }
+
+ /* if caller saves & we have not saved then */
+ if (!ic->regsSaved)
+ saveRegisters (ic);
+
+ if (swapBanks)
+ {
+ emitcode ("mov", "psw,#0x%02x",
+ ((FUNC_REGBANK(dtype)) << 3) & 0xff);
+ }
+
+ /* make the call */
+ emitcode ("lcall", "%s", (OP_SYMBOL (IC_LEFT (ic))->rname[0] ?
+ OP_SYMBOL (IC_LEFT (ic))->rname :
+ OP_SYMBOL (IC_LEFT (ic))->name));
+
+ if (swapBanks)
+ {
+ emitcode ("mov", "psw,#0x%02x",
+ ((FUNC_REGBANK(currFunc->type)) << 3) & 0xff);
+ }
+
+ /* if we need assign a result value */
+ if ((IS_ITEMP (IC_RESULT (ic)) &&
+ (OP_SYMBOL (IC_RESULT (ic))->nRegs ||
+ OP_SYMBOL (IC_RESULT (ic))->accuse ||
+ OP_SYMBOL (IC_RESULT (ic))->spildir)) ||
+ IS_TRUE_SYMOP (IC_RESULT (ic)))
+ {
- if (IS_ISR(sym->etype)) {
+ _G.accInUse++;
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ _G.accInUse--;
- /* now we need to restore the registers */
- /* if this isr has no bank i.e. is going to
- run with bank 0 , then we need to save more
- registers :-) */
- if (!SPEC_BANK(sym->etype)) {
-
- /* if this function does not call any other
- function then we can be economical and
- save only those registers that are used */
- if (! sym->hasFcall) {
- int i;
-
- /* if any registers used */
- if (sym->regsUsed) {
- /* save the registers used */
- for ( i = sym->regsUsed->size ; i >= 0 ; i--) {
- if (bitVectBitValue(sym->regsUsed,i) ||
- (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)) )
- emitcode("pop","%s",mcs51_regWithIdx(i)->dname);
- }
- }
-
- } else {
- /* this function has a function call cannot
- determines register usage so we will have the
- entire bank */
- unsaverbank(0,ic,FALSE);
- }
- }
+ assignResultValue (IC_RESULT (ic));
- if (options.model == MODEL_FLAT24 && !inExcludeList("dpx"))
- emitcode ("pop", "dpx");
- if (!inExcludeList("dph"))
- emitcode ("pop","dph");
- if (!inExcludeList("dpl"))
- emitcode ("pop","dpl");
- if (!inExcludeList("b"))
- emitcode ("pop","b");
- if (!inExcludeList("acc"))
- emitcode ("pop","acc");
-
- if (SPEC_CRTCL(sym->etype))
- emitcode("setb","ea");
-
- /* if debug then send end of function */
-/* if (options.debug && currFunc) { */
- if (currFunc) {
- _G.debugLine = 1;
- emitcode("","C$%s$%d$%d$%d ==.",
- ic->filename,currFunc->lastLine,
- ic->level,ic->block);
- if (IS_STATIC(currFunc->etype))
- emitcode("","XF%s$%s$0$0 ==.",moduleName,currFunc->name);
- else
- emitcode("","XG$%s$0$0 ==.",currFunc->name);
- _G.debugLine = 0;
- }
-
- emitcode ("reti","");
- }
- else {
- if (SPEC_CRTCL(sym->etype))
- emitcode("setb","ea");
-
- if (sym->calleeSave) {
- int i;
-
- /* if any registers used */
- if (sym->regsUsed) {
- /* save the registers used */
- for ( i = sym->regsUsed->size ; i >= 0 ; i--) {
- if (bitVectBitValue(sym->regsUsed,i) ||
- (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)) )
- emitcode("pop","%s",mcs51_regWithIdx(i)->dname);
- }
- }
-
- }
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+ }
- /* if debug then send end of function */
-/* if (options.debug && currFunc) { */
- if (currFunc) {
- _G.debugLine = 1;
- emitcode("","C$%s$%d$%d$%d ==.",
- ic->filename,currFunc->lastLine,
- ic->level,ic->block);
- if (IS_STATIC(currFunc->etype))
- emitcode("","XF%s$%s$0$0 ==.",moduleName,currFunc->name);
- else
- emitcode("","XG$%s$0$0 ==.",currFunc->name);
- _G.debugLine = 0;
+ /* adjust the stack for parameters if
+ required */
+ if (ic->parmBytes)
+ {
+ int i;
+ if (ic->parmBytes > 3)
+ {
+ emitcode ("mov", "a,%s", spname);
+ emitcode ("add", "a,#0x%02x", (-ic->parmBytes) & 0xff);
+ emitcode ("mov", "%s,a", spname);
}
-
- emitcode ("ret","");
+ else
+ for (i = 0; i < ic->parmBytes; i++)
+ emitcode ("dec", "%s", spname);
}
+ /* if we hade saved some registers then unsave them */
+ if (ic->regsSaved && !IFFUNC_CALLEESAVES(dtype))
+ unsaveRegisters (ic);
+
+// /* if register bank was saved then pop them */
+// if (restoreBank)
+// unsaveRBank (FUNC_REGBANK (dtype), ic, FALSE);
}
/*-----------------------------------------------------------------*/
-/* genRet - generate code for return statement */
+/* -10l - generates a call by pointer statement */
/*-----------------------------------------------------------------*/
-static void genRet (iCode *ic)
+static void
+genPcall (iCode * ic)
{
- int size,offset = 0 , pushed = 0;
-
- /* if we have no return value then
- just generate the "ret" */
- if (!IC_LEFT(ic))
- goto jumpret;
-
- /* we have something to return then
- move the return value into place */
- aopOp(IC_LEFT(ic),ic,FALSE);
- size = AOP_SIZE(IC_LEFT(ic));
-
- while (size--) {
- char *l ;
- if (AOP_TYPE(IC_LEFT(ic)) == AOP_DPTR) {
- l = aopGet(AOP(IC_LEFT(ic)),offset++,
- FALSE,TRUE);
- emitcode("push","%s",l);
- pushed++;
- } else {
- l = aopGet(AOP(IC_LEFT(ic)),offset,
- FALSE,FALSE);
- if (strcmp(fReturn[offset],l))
- emitcode("mov","%s,%s",fReturn[offset++],l);
- }
- }
-
- if (pushed) {
- while(pushed) {
- pushed--;
- if (strcmp(fReturn[pushed],"a"))
- emitcode("pop",fReturn[pushed]);
- else
- emitcode("pop","acc");
- }
+ sym_link *dtype;
+ symbol *rlbl = newiTempLabel (NULL);
+// bool restoreBank=FALSE;
+ bool swapBanks = FALSE;
+
+ D(emitcode("; genPCall",""));
+
+ /* if caller saves & we have not saved then */
+ if (!ic->regsSaved)
+ saveRegisters (ic);
+
+ /* if we are calling a not _naked function that is not using
+ the same register bank then we need to save the
+ destination registers on the stack */
+ dtype = operandType (IC_LEFT (ic))->next;
+ if (currFunc && dtype && !IFFUNC_ISNAKED(dtype) &&
+ (FUNC_REGBANK (currFunc->type) != FUNC_REGBANK (dtype)) &&
+ !IFFUNC_ISISR (dtype))
+ {
+// saveRBank (FUNC_REGBANK (dtype), ic, TRUE);
+// restoreBank=TRUE;
+ swapBanks = TRUE;
+ // need caution message to user here
+ }
+
+ /* push the return address on to the stack */
+ emitcode ("mov", "a,#%05d$", (rlbl->key + 100));
+ emitcode ("push", "acc");
+ emitcode ("mov", "a,#(%05d$ >> 8)", (rlbl->key + 100));
+ emitcode ("push", "acc");
+
+ /* now push the calling address */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+
+ pushSide (IC_LEFT (ic), FPTRSIZE);
+
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
+
+ /* if send set is not empty the assign */
+ if (_G.sendSet)
+ {
+ genSend(reverseSet(_G.sendSet));
+ _G.sendSet = NULL;
}
- freeAsmop (IC_LEFT(ic),NULL,ic,TRUE);
-
- jumpret:
- /* generate a jump to the return label
- if the next is not the return statement */
- if (!(ic->next && ic->next->op == LABEL &&
- IC_LABEL(ic->next) == returnLabel))
-
- emitcode("ljmp","%05d$",(returnLabel->key+100));
-
-}
-/*-----------------------------------------------------------------*/
-/* genLabel - generates a label */
-/*-----------------------------------------------------------------*/
-static void genLabel (iCode *ic)
-{
- /* special case never generate */
- if (IC_LABEL(ic) == entryLabel)
- return ;
+ if (swapBanks)
+ {
+ emitcode ("mov", "psw,#0x%02x",
+ ((FUNC_REGBANK(dtype)) << 3) & 0xff);
+ }
- emitcode("","%05d$:",(IC_LABEL(ic)->key+100));
-}
+ /* make the call */
+ emitcode ("ret", "");
+ emitcode ("", "%05d$:", (rlbl->key + 100));
-/*-----------------------------------------------------------------*/
-/* genGoto - generates a ljmp */
-/*-----------------------------------------------------------------*/
-static void genGoto (iCode *ic)
-{
- emitcode ("ljmp","%05d$",(IC_LABEL(ic)->key+100));
-}
-/*-----------------------------------------------------------------*/
-/* genPlusIncr :- does addition with increment if possible */
-/*-----------------------------------------------------------------*/
-static bool genPlusIncr (iCode *ic)
-{
- unsigned int icount ;
- unsigned int size = getDataSize(IC_RESULT(ic));
-
- /* will try to generate an increment */
- /* if the right side is not a literal
- we cannot */
- if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT)
- return FALSE ;
-
- /* if the literal value of the right hand side
- is greater than 4 then it is not worth it */
- if ((icount = floatFromVal (AOP(IC_RIGHT(ic))->aopu.aop_lit)) > 4)
- return FALSE ;
-
- /* if increment 16 bits in register */
- if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) &&
- (size > 1) &&
- (icount == 1)) {
- symbol *tlbl = newiTempLabel(NULL);
- emitcode("inc","%s",aopGet(AOP(IC_RESULT(ic)),LSB,FALSE,FALSE));
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_REG ||
- IS_AOP_PREG(IC_RESULT(ic)))
- emitcode("cjne","%s,#0x00,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),LSB,FALSE,FALSE)
- ,tlbl->key+100);
- else {
- emitcode("clr","a");
- emitcode("cjne","a,%s,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),LSB,FALSE,FALSE)
- ,tlbl->key+100);
- }
-
- emitcode("inc","%s",aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE,FALSE));
- if (size > 2)
- {
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_REG ||
- IS_AOP_PREG(IC_RESULT(ic)))
- emitcode("cjne","%s,#0x00,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE,FALSE)
- ,tlbl->key+100);
- else
- emitcode("cjne","a,%s,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE,FALSE)
- ,tlbl->key+100);
-
- emitcode("inc","%s",aopGet(AOP(IC_RESULT(ic)),MSB24,FALSE,FALSE));
- }
- if (size > 3)
- {
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_REG ||
- IS_AOP_PREG(IC_RESULT(ic)))
- emitcode("cjne","%s,#0x00,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB24,FALSE,FALSE)
- ,tlbl->key+100);
- else{
- emitcode("cjne","a,%s,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB24,FALSE,FALSE)
- ,tlbl->key+100);
- }
- emitcode("inc","%s",aopGet(AOP(IC_RESULT(ic)),MSB32,FALSE,FALSE));
- }
- emitcode("","%05d$:",tlbl->key+100);
- return TRUE;
+ if (swapBanks)
+ {
+ emitcode ("mov", "psw,#0x%02x",
+ ((FUNC_REGBANK(currFunc->type)) << 3) & 0xff);
+ }
+
+ /* if we need assign a result value */
+ if ((IS_ITEMP (IC_RESULT (ic)) &&
+ (OP_SYMBOL (IC_RESULT (ic))->nRegs ||
+ OP_SYMBOL (IC_RESULT (ic))->spildir)) ||
+ IS_TRUE_SYMOP (IC_RESULT (ic)))
+ {
+
+ _G.accInUse++;
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ _G.accInUse--;
+
+ assignResultValue (IC_RESULT (ic));
+
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
-
- /* if the sizes are greater than 1 then we cannot */
- if (AOP_SIZE(IC_RESULT(ic)) > 1 ||
- AOP_SIZE(IC_LEFT(ic)) > 1 )
- return FALSE ;
-
- /* we can if the aops of the left & result match or
- if they are in registers and the registers are the
- same */
- if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) ) {
-
- if (icount > 3) {
- MOVA(aopGet(AOP(IC_LEFT(ic)),0,FALSE,FALSE));
- emitcode("add","a,#0x%02x",((char) icount) & 0xff);
- aopPut(AOP(IC_RESULT(ic)),"a",0);
- } else {
-
- while (icount--)
- emitcode ("inc","%s",aopGet(AOP(IC_LEFT(ic)),0,FALSE,FALSE));
- }
-
- return TRUE ;
+
+ /* adjust the stack for parameters if
+ required */
+ if (ic->parmBytes)
+ {
+ int i;
+ if (ic->parmBytes > 3)
+ {
+ emitcode ("mov", "a,%s", spname);
+ emitcode ("add", "a,#0x%02x", (-ic->parmBytes) & 0xff);
+ emitcode ("mov", "%s,a", spname);
+ }
+ else
+ for (i = 0; i < ic->parmBytes; i++)
+ emitcode ("dec", "%s", spname);
+
}
-
- return FALSE ;
+
+// /* if register bank was saved then unsave them */
+// if (restoreBank)
+// unsaveRBank (FUNC_REGBANK (dtype), ic, TRUE);
+
+ /* if we hade saved some registers then
+ unsave them */
+ if (ic->regsSaved && !IFFUNC_CALLEESAVES(dtype))
+ unsaveRegisters (ic);
}
/*-----------------------------------------------------------------*/
-/* outBitAcc - output a bit in acc */
+/* resultRemat - result is rematerializable */
/*-----------------------------------------------------------------*/
-static void outBitAcc(operand *result)
+static int
+resultRemat (iCode * ic)
{
- symbol *tlbl = newiTempLabel(NULL);
- /* if the result is a bit */
- if (AOP_TYPE(result) == AOP_CRY){
- aopPut(AOP(result),"a",0);
- }
- else {
- emitcode("jz","%05d$",tlbl->key+100);
- emitcode("mov","a,%s",one);
- emitcode("","%05d$:",tlbl->key+100);
- outAcc(result);
+ if (SKIP_IC (ic) || ic->op == IFX)
+ return 0;
+
+ if (IC_RESULT (ic) && IS_ITEMP (IC_RESULT (ic)))
+ {
+ symbol *sym = OP_SYMBOL (IC_RESULT (ic));
+ if (sym->remat && !POINTER_SET (ic))
+ return 1;
}
+
+ return 0;
}
+#if defined(__BORLANDC__) || defined(_MSC_VER)
+#define STRCASECMP stricmp
+#else
+#define STRCASECMP strcasecmp
+#endif
+
/*-----------------------------------------------------------------*/
-/* genPlusBits - generates code for addition of two bits */
+/* inExcludeList - return 1 if the string is in exclude Reg list */
/*-----------------------------------------------------------------*/
-static void genPlusBits (iCode *ic)
+static int
+regsCmp(void *p1, void *p2)
{
- if (AOP_TYPE(IC_RESULT(ic)) == AOP_CRY){
- symbol *lbl = newiTempLabel(NULL);
- emitcode("mov","c,%s",AOP(IC_LEFT(ic))->aopu.aop_dir);
- emitcode("jnb","%s,%05d$",AOP(IC_RIGHT(ic))->aopu.aop_dir,(lbl->key+100));
- emitcode("cpl","c");
- emitcode("","%05d$:",(lbl->key+100));
- outBitC(IC_RESULT(ic));
- }
- else{
- emitcode("clr","a");
- emitcode("mov","c,%s",AOP(IC_LEFT(ic))->aopu.aop_dir);
- emitcode("rlc","a");
- emitcode("mov","c,%s",AOP(IC_RIGHT(ic))->aopu.aop_dir);
- emitcode("addc","a,#0x00");
- outAcc(IC_RESULT(ic));
- }
+ return (STRCASECMP((char *)p1, (char *)(p2)) == 0);
}
-#if 0
-/* This is the original version of this code.
- *
- * This is being kept around for reference,
- * because I am not entirely sure I got it right...
- */
-static void adjustArithmeticResult(iCode *ic)
-{
- if (AOP_SIZE(IC_RESULT(ic)) == 3 &&
- AOP_SIZE(IC_LEFT(ic)) == 3 &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_LEFT(ic))))
- aopPut(AOP(IC_RESULT(ic)),
- aopGet(AOP(IC_LEFT(ic)),2,FALSE,FALSE),
- 2);
-
- if (AOP_SIZE(IC_RESULT(ic)) == 3 &&
- AOP_SIZE(IC_RIGHT(ic)) == 3 &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_RIGHT(ic))))
- aopPut(AOP(IC_RESULT(ic)),
- aopGet(AOP(IC_RIGHT(ic)),2,FALSE,FALSE),
- 2);
-
- if (AOP_SIZE(IC_RESULT(ic)) == 3 &&
- AOP_SIZE(IC_LEFT(ic)) < 3 &&
- AOP_SIZE(IC_RIGHT(ic)) < 3 &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_LEFT(ic))) &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_RIGHT(ic)))) {
- char buffer[5];
- sprintf(buffer,"#%d",pointerCode(getSpec(operandType(IC_LEFT(ic)))));
- aopPut(AOP(IC_RESULT(ic)),buffer,2);
- }
-}
-#else
-/* This is the pure and virtuous version of this code.
- * I'm pretty certain it's right, but not enough to toss the old
- * code just yet...
- */
-static void adjustArithmeticResult(iCode *ic)
+static bool
+inExcludeList (char *s)
{
- if (opIsGptr(IC_RESULT(ic)) &&
- opIsGptr(IC_LEFT(ic)) &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_LEFT(ic))))
- {
- aopPut(AOP(IC_RESULT(ic)),
- aopGet(AOP(IC_LEFT(ic)), GPTRSIZE - 1,FALSE,FALSE),
- GPTRSIZE - 1);
- }
+ const char *p = setFirstItem(options.excludeRegsSet);
+
+ if (p == NULL || STRCASECMP(p, "none") == 0)
+ return FALSE;
- if (opIsGptr(IC_RESULT(ic)) &&
- opIsGptr(IC_RIGHT(ic)) &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_RIGHT(ic))))
- {
- aopPut(AOP(IC_RESULT(ic)),
- aopGet(AOP(IC_RIGHT(ic)),GPTRSIZE - 1,FALSE,FALSE),
- GPTRSIZE - 1);
- }
- if (opIsGptr(IC_RESULT(ic)) &&
- AOP_SIZE(IC_LEFT(ic)) < GPTRSIZE &&
- AOP_SIZE(IC_RIGHT(ic)) < GPTRSIZE &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_LEFT(ic))) &&
- !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_RIGHT(ic)))) {
- char buffer[5];
- sprintf(buffer,"#%d",pointerCode(getSpec(operandType(IC_LEFT(ic)))));
- aopPut(AOP(IC_RESULT(ic)),buffer,GPTRSIZE - 1);
- }
+ return isinSetWith(options.excludeRegsSet, s, regsCmp);
}
-#endif
/*-----------------------------------------------------------------*/
-/* genPlus - generates code for addition */
+/* genFunction - generated code for function entry */
/*-----------------------------------------------------------------*/
-static void genPlus (iCode *ic)
-{
- int size, offset = 0;
-
- /* special cases :- */
-
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RIGHT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
-
- /* if literal, literal on the right or
- if left requires ACC or right is already
- in ACC */
- if ((AOP_TYPE(IC_LEFT(ic)) == AOP_LIT) ||
- (AOP_NEEDSACC(IC_LEFT(ic))) ||
- AOP_TYPE(IC_RIGHT(ic)) == AOP_ACC ){
- operand *t = IC_RIGHT(ic);
- IC_RIGHT(ic) = IC_LEFT(ic);
- IC_LEFT(ic) = t;
- }
-
- /* if both left & right are in bit
- space */
- if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY &&
- AOP_TYPE(IC_RIGHT(ic)) == AOP_CRY) {
- genPlusBits (ic);
- goto release ;
- }
-
- /* if left in bit space & right literal */
- if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY &&
- AOP_TYPE(IC_RIGHT(ic)) == AOP_LIT) {
- emitcode("mov","c,%s",AOP(IC_LEFT(ic))->aopu.aop_dir);
- /* if result in bit space */
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_CRY){
- if((unsigned long)floatFromVal(AOP(IC_RIGHT(ic))->aopu.aop_lit) != 0L)
- emitcode("cpl","c");
- outBitC(IC_RESULT(ic));
- } else {
- size = getDataSize(IC_RESULT(ic));
- while (size--) {
- MOVA(aopGet(AOP(IC_RIGHT(ic)),offset,FALSE,FALSE));
- emitcode("addc","a,#00");
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
- }
- }
- goto release ;
- }
-
- /* if I can do an increment instead
- of add then GOOD for ME */
- if (genPlusIncr (ic) == TRUE)
- goto release;
-
- size = getDataSize(IC_RESULT(ic));
+static void
+genFunction (iCode * ic)
+{
+ symbol *sym;
+ sym_link *ftype;
+ bool switchedPSW = FALSE;
+ int calleesaves_saved_register = -1;
+
+ _G.nRegsSaved = 0;
+ /* create the function header */
+ emitcode (";", "-----------------------------------------");
+ emitcode (";", " function %s", (sym = OP_SYMBOL (IC_LEFT (ic)))->name);
+ emitcode (";", "-----------------------------------------");
+
+ emitcode ("", "%s:", sym->rname);
+ ftype = operandType (IC_LEFT (ic));
+
+ if (IFFUNC_ISNAKED(ftype))
+ {
+ emitcode(";", "naked function: no prologue.");
+ return;
+ }
+
+ /* here we need to generate the equates for the
+ register bank if required */
+ if (FUNC_REGBANK (ftype) != rbank)
+ {
+ int i;
- while(size--){
- if (AOP_TYPE(IC_LEFT(ic)) == AOP_ACC) {
- MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE,FALSE));
- if(offset == 0)
- emitcode("add","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE,FALSE));
- else
- emitcode("addc","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE,FALSE));
- } else {
- MOVA(aopGet(AOP(IC_RIGHT(ic)),offset,FALSE,FALSE));
- if(offset == 0)
- emitcode("add","a,%s",
- aopGet(AOP(IC_LEFT(ic)),offset,FALSE,FALSE));
- else
- emitcode("addc","a,%s",
- aopGet(AOP(IC_LEFT(ic)),offset,FALSE,FALSE));
+ rbank = FUNC_REGBANK (ftype);
+ for (i = 0; i < mcs51_nRegs; i++)
+ {
+ if (strcmp (regs8051[i].base, "0") == 0)
+ emitcode ("", "%s = 0x%02x",
+ regs8051[i].dname,
+ 8 * rbank + regs8051[i].offset);
+ else
+ emitcode ("", "%s = %s + 0x%02x",
+ regs8051[i].dname,
+ regs8051[i].base,
+ 8 * rbank + regs8051[i].offset);
}
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
}
- adjustArithmeticResult(ic);
+ /* if this is an interrupt service routine then
+ save acc, b, dpl, dph */
+ if (IFFUNC_ISISR (sym->type))
+ {
-release:
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(IC_RIGHT(ic),NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
-}
+ if (!inExcludeList ("acc"))
+ emitcode ("push", "acc");
+ if (!inExcludeList ("b"))
+ emitcode ("push", "b");
+ if (!inExcludeList ("dpl"))
+ emitcode ("push", "dpl");
+ if (!inExcludeList ("dph"))
+ emitcode ("push", "dph");
+ /* if this isr has no bank i.e. is going to
+ run with bank 0 , then we need to save more
+ registers :-) */
+ if (!FUNC_REGBANK (sym->type))
+ {
-/*-----------------------------------------------------------------*/
-/* genMinusDec :- does subtraction with deccrement if possible */
-/*-----------------------------------------------------------------*/
-static bool genMinusDec (iCode *ic)
-{
- unsigned int icount ;
- unsigned int size = getDataSize(IC_RESULT(ic));
-
- /* will try to generate an increment */
- /* if the right side is not a literal
- we cannot */
- if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT)
- return FALSE ;
-
- /* if the literal value of the right hand side
- is greater than 4 then it is not worth it */
- if ((icount = (unsigned int) floatFromVal (AOP(IC_RIGHT(ic))->aopu.aop_lit)) > 4)
- return FALSE ;
-
- size = getDataSize(IC_RESULT(ic));
- /* if decrement 16 bits in register */
- if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) &&
- (size > 1) &&
- (icount == 1)) {
- symbol *tlbl = newiTempLabel(NULL);
- emitcode("dec","%s",aopGet(AOP(IC_RESULT(ic)),LSB,FALSE,FALSE));
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_REG ||
- IS_AOP_PREG(IC_RESULT(ic)))
- emitcode("cjne","%s,#0xff,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),LSB,FALSE,FALSE)
- ,tlbl->key+100);
- else{
- emitcode("mov","a,#0xff");
- emitcode("cjne","a,%s,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),LSB,FALSE,FALSE)
- ,tlbl->key+100);
- }
- emitcode("dec","%s",aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE,FALSE));
- if (size > 2)
+ /* if this function does not call any other
+ function then we can be economical and
+ save only those registers that are used */
+ if (!IFFUNC_HASFCALL(sym->type))
+ {
+ int i;
+
+ /* if any registers used */
+ if (sym->regsUsed)
{
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_REG ||
- IS_AOP_PREG(IC_RESULT(ic)))
- emitcode("cjne","%s,#0xff,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE,FALSE)
- ,tlbl->key+100);
- else{
- emitcode("cjne","a,%s,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE,FALSE)
- ,tlbl->key+100);
- }
- emitcode("dec","%s",aopGet(AOP(IC_RESULT(ic)),MSB24,FALSE,FALSE));
+ /* save the registers used */
+ for (i = 0; i < sym->regsUsed->size; i++)
+ {
+ if (bitVectBitValue (sym->regsUsed, i) ||
+ (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)))
+ emitcode ("push", "%s", mcs51_regWithIdx (i)->dname);
+ }
+ }
+
+ }
+ else
+ {
+
+ /* this function has a function call cannot
+ determines register usage so we will have to push the
+ entire bank */
+ saveRBank (0, ic, FALSE);
+ if (options.parms_in_bank1) {
+ int i;
+ for (i=0; i < 8 ; i++ ) {
+ emitcode ("push","%s",rb1regs[i]);
+ }
}
- if (size > 3)
+ }
+ }
+ else
+ {
+ /* This ISR uses a non-zero bank.
+ *
+ * We assume that the bank is available for our
+ * exclusive use.
+ *
+ * However, if this ISR calls a function which uses some
+ * other bank, we must save that bank entirely.
+ */
+ unsigned long banksToSave = 0;
+
+ if (IFFUNC_HASFCALL(sym->type))
+ {
+
+#define MAX_REGISTER_BANKS 4
+
+ iCode *i;
+ int ix;
+
+ for (i = ic; i; i = i->next)
+ {
+ if (i->op == ENDFUNCTION)
+ {
+ /* we got to the end OK. */
+ break;
+ }
+
+ if (i->op == CALL)
+ {
+ sym_link *dtype;
+
+ dtype = operandType (IC_LEFT(i));
+ if (dtype
+ && FUNC_REGBANK(dtype) != FUNC_REGBANK(sym->type))
+ {
+ /* Mark this bank for saving. */
+ if (FUNC_REGBANK(dtype) >= MAX_REGISTER_BANKS)
+ {
+ werror(E_NO_SUCH_BANK, FUNC_REGBANK(dtype));
+ }
+ else
+ {
+ banksToSave |= (1 << FUNC_REGBANK(dtype));
+ }
+
+ /* And note that we don't need to do it in
+ * genCall.
+ */
+ i->bankSaved = 1;
+ }
+ }
+ if (i->op == PCALL)
+ {
+ /* This is a mess; we have no idea what
+ * register bank the called function might
+ * use.
+ *
+ * The only thing I can think of to do is
+ * throw a warning and hope.
+ */
+ werror(W_FUNCPTR_IN_USING_ISR);
+ }
+ }
+
+ if (banksToSave && options.useXstack)
{
- if(AOP_TYPE(IC_RESULT(ic)) == AOP_REG ||
- IS_AOP_PREG(IC_RESULT(ic)))
- emitcode("cjne","%s,#0xff,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB24,FALSE,FALSE)
- ,tlbl->key+100);
- else{
- emitcode("cjne","a,%s,%05d$"
- ,aopGet(AOP(IC_RESULT(ic)),MSB24,FALSE,FALSE)
- ,tlbl->key+100);
- }
- emitcode("dec","%s",aopGet(AOP(IC_RESULT(ic)),MSB32,FALSE,FALSE));
+ /* Since we aren't passing it an ic,
+ * saveRBank will assume r0 is available to abuse.
+ *
+ * So switch to our (trashable) bank now, so
+ * the caller's R0 isn't trashed.
+ */
+ emitcode ("push", "psw");
+ emitcode ("mov", "psw,#0x%02x",
+ (FUNC_REGBANK (sym->type) << 3) & 0x00ff);
+ switchedPSW = TRUE;
}
- emitcode("","%05d$:",tlbl->key+100);
- return TRUE;
+
+ for (ix = 0; ix < MAX_REGISTER_BANKS; ix++)
+ {
+ if (banksToSave & (1 << ix))
+ {
+ saveRBank(ix, NULL, FALSE);
+ }
+ }
+ }
+ // TODO: this needs a closer look
+ SPEC_ISR_SAVED_BANKS(currFunc->etype) = banksToSave;
+ }
}
+ else
+ {
+ /* if callee-save to be used for this function
+ then save the registers being used in this function */
+ if (IFFUNC_CALLEESAVES(sym->type))
+ {
+ int i;
- /* if the sizes are greater than 1 then we cannot */
- if (AOP_SIZE(IC_RESULT(ic)) > 1 ||
- AOP_SIZE(IC_LEFT(ic)) > 1 )
- return FALSE ;
+ /* if any registers used */
+ if (sym->regsUsed)
+ {
+ /* save the registers used */
+ for (i = 0; i < sym->regsUsed->size; i++)
+ {
+ if (bitVectBitValue (sym->regsUsed, i) ||
+ (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)))
+ {
+ /* remember one saved register for later usage */
+ if (calleesaves_saved_register < 0)
+ calleesaves_saved_register = i;
+ emitcode ("push", "%s", mcs51_regWithIdx (i)->dname);
+ _G.nRegsSaved++;
+ }
+ }
+ }
+ }
+ }
- /* we can if the aops of the left & result match or
- if they are in registers and the registers are the
- same */
- if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic)))) {
+ /* set the register bank to the desired value */
+ if (( /* FUNC_REGBANK (sym->type) || */ IFFUNC_ISISR (sym->type))
+ && !switchedPSW)
+ {
+ emitcode ("push", "psw");
+ emitcode ("mov", "psw,#0x%02x", (FUNC_REGBANK (sym->type) << 3) & 0x00ff);
+ }
- while (icount--)
- emitcode ("dec","%s",aopGet(AOP(IC_RESULT(ic)),0,FALSE,FALSE));
+ if (IFFUNC_ISREENT (sym->type) || options.stackAuto)
+ {
- return TRUE ;
+ if (options.useXstack)
+ {
+ emitcode ("mov", "r0,%s", spname);
+ emitcode ("mov", "a,_bp");
+ emitcode ("movx", "@r0,a");
+ emitcode ("inc", "%s", spname);
+ }
+ else
+ {
+ /* set up the stack */
+ emitcode ("push", "_bp"); /* save the callers stack */
+ }
+ emitcode ("mov", "_bp,%s", spname);
}
- return FALSE ;
-}
+ /* adjust the stack for the function */
+ if (sym->stack)
+ {
-/*-----------------------------------------------------------------*/
-/* addSign - complete with sign */
-/*-----------------------------------------------------------------*/
-static void addSign(operand *result, int offset, int sign)
-{
- int size = (getDataSize(result) - offset);
- if(size > 0){
- if(sign){
- emitcode("rlc","a");
- emitcode("subb","a,acc");
- while(size--)
- aopPut(AOP(result),"a",offset++);
- } else
- while(size--)
- aopPut(AOP(result),zero,offset++);
+ int i = sym->stack;
+ if (i > 256)
+ werror (W_STACK_OVERFLOW, sym->name);
+
+ if (i > 3 && sym->recvSize < 4)
+ {
+
+ emitcode ("mov", "a,sp");
+ emitcode ("add", "a,#0x%02x", ((char) sym->stack & 0xff));
+ emitcode ("mov", "sp,a");
+
+ }
+ else if (i > 5)
+ {
+ if (IFFUNC_CALLEESAVES(sym->type))
+ {
+ /* if it's a callee-saves function we need a saved register */
+ if (calleesaves_saved_register >= 0)
+ {
+ emitcode ("mov", "%s,a", mcs51_regWithIdx (calleesaves_saved_register)->dname);
+ emitcode ("mov", "a,sp");
+ emitcode ("add", "a,#0x%02x", ((char) sym->stack & 0xff));
+ emitcode ("mov", "sp,a");
+ emitcode ("mov", "a,%s", mcs51_regWithIdx (calleesaves_saved_register)->dname);
+ }
+ else
+ /* do it the hard way */
+ while (i--)
+ emitcode ("inc", "sp");
+ }
+ else
+ {
+ /* not callee-saves, we can clobber r0 */
+ emitcode ("mov", "r0,a");
+ emitcode ("mov", "a,sp");
+ emitcode ("add", "a,#0x%02x", ((char) sym->stack & 0xff));
+ emitcode ("mov", "sp,a");
+ emitcode ("mov", "a,r0");
+ }
+ }
+ else
+ while (i--)
+ emitcode ("inc", "sp");
}
-}
-/*-----------------------------------------------------------------*/
-/* genMinusBits - generates code for subtraction of two bits */
-/*-----------------------------------------------------------------*/
-static void genMinusBits (iCode *ic)
-{
- symbol *lbl = newiTempLabel(NULL);
- if (AOP_TYPE(IC_RESULT(ic)) == AOP_CRY){
- emitcode("mov","c,%s",AOP(IC_LEFT(ic))->aopu.aop_dir);
- emitcode("jnb","%s,%05d$",AOP(IC_RIGHT(ic))->aopu.aop_dir,(lbl->key+100));
- emitcode("cpl","c");
- emitcode("","%05d$:",(lbl->key+100));
- outBitC(IC_RESULT(ic));
+ if (sym->xstack)
+ {
+
+ emitcode ("mov", "a,_spx");
+ emitcode ("add", "a,#0x%02x", ((char) sym->xstack & 0xff));
+ emitcode ("mov", "_spx,a");
}
- else{
- emitcode("mov","c,%s",AOP(IC_RIGHT(ic))->aopu.aop_dir);
- emitcode("subb","a,acc");
- emitcode("jnb","%s,%05d$",AOP(IC_LEFT(ic))->aopu.aop_dir,(lbl->key+100));
- emitcode("inc","a");
- emitcode("","%05d$:",(lbl->key+100));
- aopPut(AOP(IC_RESULT(ic)),"a",0);
- addSign(IC_RESULT(ic), MSB16, SPEC_USIGN(getSpec(operandType(IC_RESULT(ic)))));
+
+ /* if critical function then turn interrupts off */
+ if (IFFUNC_ISCRITICAL (ftype))
+ {
+ symbol *tlbl = newiTempLabel (NULL);
+ emitcode ("setb", "c");
+ emitcode ("jbc", "ea,%05d$", (tlbl->key + 100)); /* atomic test & clear */
+ emitcode ("clr", "c");
+ emitcode ("", "%05d$:", (tlbl->key + 100));
+ emitcode ("push", "psw"); /* save old ea via c in psw */
}
}
/*-----------------------------------------------------------------*/
-/* genMinus - generates code for subtraction */
+/* genEndFunction - generates epilogue for functions */
/*-----------------------------------------------------------------*/
-static void genMinus (iCode *ic)
+static void
+genEndFunction (iCode * ic)
{
- int size, offset = 0;
- unsigned long lit = 0L;
-
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RIGHT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
-
- /* special cases :- */
- /* if both left & right are in bit space */
- if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY &&
- AOP_TYPE(IC_RIGHT(ic)) == AOP_CRY) {
- genMinusBits (ic);
- goto release ;
+ symbol *sym = OP_SYMBOL (IC_LEFT (ic));
+
+ if (IFFUNC_ISNAKED(sym->type))
+ {
+ emitcode(";", "naked function: no epilogue.");
+ return;
+ }
+
+ if (IFFUNC_ISCRITICAL (sym->type))
+ {
+ emitcode ("pop", "psw"); /* restore ea via c in psw */
+ emitcode ("mov", "ea,c");
}
- /* if I can do an decrement instead
- of subtract then GOOD for ME */
- if (genMinusDec (ic) == TRUE)
- goto release;
-
- size = getDataSize(IC_RESULT(ic));
-
- if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT){
- CLRC;
- }
- else{
- lit = (unsigned long)floatFromVal(AOP(IC_RIGHT(ic))->aopu.aop_lit);
- lit = - (long)lit;
+ if (IFFUNC_ISREENT (sym->type) || options.stackAuto)
+ {
+ emitcode ("mov", "%s,_bp", spname);
}
- /* if literal, add a,#-lit, else normal subb */
- while (size--) {
- MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE,FALSE));
- if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT)
- emitcode("subb","a,%s",
- aopGet(AOP(IC_RIGHT(ic)),offset,FALSE,FALSE));
- else{
- /* first add without previous c */
- if(!offset)
- emitcode("add","a,#0x%02x",
- (unsigned int)(lit & 0x0FFL));
- else
- emitcode("addc","a,#0x%02x",
- (unsigned int)((lit >> (offset*8)) & 0x0FFL));
- }
- aopPut(AOP(IC_RESULT(ic)),"a",offset++);
+ /* if use external stack but some variables were
+ added to the local stack then decrement the
+ local stack */
+ if (options.useXstack && sym->stack)
+ {
+ emitcode ("mov", "a,sp");
+ emitcode ("add", "a,#0x%02x", ((char) -sym->stack) & 0xff);
+ emitcode ("mov", "sp,a");
}
- adjustArithmeticResult(ic);
-
-release:
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(IC_RIGHT(ic),NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
-}
+ if ((IFFUNC_ISREENT (sym->type) || options.stackAuto))
+ {
+ if (options.useXstack)
+ {
+ emitcode ("mov", "r0,%s", spname);
+ emitcode ("movx", "a,@r0");
+ emitcode ("mov", "_bp,a");
+ emitcode ("dec", "%s", spname);
+ }
+ else
+ {
+ emitcode ("pop", "_bp");
+ }
+ }
-/*-----------------------------------------------------------------*/
-/* genMultbits :- multiplication of bits */
-/*-----------------------------------------------------------------*/
-static void genMultbits (operand *left,
- operand *right,
- operand *result)
-{
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("anl","c,%s",AOP(right)->aopu.aop_dir);
- outBitC(result);
-}
+ /* restore the register bank */
+ if ( /* FUNC_REGBANK (sym->type) || */ IFFUNC_ISISR (sym->type))
+ {
+ if (/* !FUNC_REGBANK (sym->type) || */ !IFFUNC_ISISR (sym->type)
+ || !options.useXstack)
+ {
+ /* Special case of ISR using non-zero bank with useXstack
+ * is handled below.
+ */
+ emitcode ("pop", "psw");
+ }
+ }
+ if (IFFUNC_ISISR (sym->type))
+ {
-/*-----------------------------------------------------------------*/
-/* genMultOneByte : 8 bit multiplication & division */
-/*-----------------------------------------------------------------*/
-static void genMultOneByte (operand *left,
- operand *right,
- operand *result)
-{
- link *opetype = operandType(result);
- char *l ;
- symbol *lbl ;
- int size,offset;
+ /* now we need to restore the registers */
+ /* if this isr has no bank i.e. is going to
+ run with bank 0 , then we need to save more
+ registers :-) */
+ if (!FUNC_REGBANK (sym->type))
+ {
+ /* if this function does not call any other
+ function then we can be economical and
+ save only those registers that are used */
+ if (!IFFUNC_HASFCALL(sym->type))
+ {
+ int i;
+
+ /* if any registers used */
+ if (sym->regsUsed)
+ {
+ /* save the registers used */
+ for (i = sym->regsUsed->size; i >= 0; i--)
+ {
+ if (bitVectBitValue (sym->regsUsed, i) ||
+ (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)))
+ emitcode ("pop", "%s", mcs51_regWithIdx (i)->dname);
+ }
+ }
+
+ }
+ else
+ {
+ if (options.parms_in_bank1) {
+ int i;
+ for (i = 7 ; i >= 0 ; i-- ) {
+ emitcode ("pop","%s",rb1regs[i]);
+ }
+ }
+ /* this function has a function call cannot
+ determines register usage so we will have to pop the
+ entire bank */
+ unsaveRBank (0, ic, FALSE);
+ }
+ }
+ else
+ {
+ /* This ISR uses a non-zero bank.
+ *
+ * Restore any register banks saved by genFunction
+ * in reverse order.
+ */
+ unsigned savedBanks = SPEC_ISR_SAVED_BANKS(currFunc->etype);
+ int ix;
+
+ for (ix = MAX_REGISTER_BANKS - 1; ix >= 0; ix--)
+ {
+ if (savedBanks & (1 << ix))
+ {
+ unsaveRBank(ix, NULL, FALSE);
+ }
+ }
+
+ if (options.useXstack)
+ {
+ /* Restore bank AFTER calling unsaveRBank,
+ * since it can trash r0.
+ */
+ emitcode ("pop", "psw");
+ }
+ }
- /* (if two literals, the value is computed before) */
- /* if one literal, literal on the right */
- if (AOP_TYPE(left) == AOP_LIT){
- operand *t = right;
- right = left;
- left = t;
+ if (!inExcludeList ("dph"))
+ emitcode ("pop", "dph");
+ if (!inExcludeList ("dpl"))
+ emitcode ("pop", "dpl");
+ if (!inExcludeList ("b"))
+ emitcode ("pop", "b");
+ if (!inExcludeList ("acc"))
+ emitcode ("pop", "acc");
+
+ /* if debug then send end of function */
+ if (options.debug && currFunc)
+ {
+ _G.debugLine = 1;
+ emitcode ("", "C$%s$%d$%d$%d ==.",
+ FileBaseName (ic->filename), currFunc->lastLine,
+ ic->level, ic->block);
+ if (IS_STATIC (currFunc->etype))
+ emitcode ("", "XF%s$%s$0$0 ==.", moduleName, currFunc->name);
+ else
+ emitcode ("", "XG$%s$0$0 ==.", currFunc->name);
+ _G.debugLine = 0;
+ }
+
+ emitcode ("reti", "");
}
+ else
+ {
+ if (IFFUNC_CALLEESAVES(sym->type))
+ {
+ int i;
- size = AOP_SIZE(result);
- /* signed or unsigned */
- emitcode("mov","b,%s", aopGet(AOP(right),0,FALSE,FALSE));
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("mul","ab");
- /* if result size = 1, mul signed = mul unsigned */
- aopPut(AOP(result),"a",0);
- if (size > 1){
- if (SPEC_USIGN(opetype)){
- aopPut(AOP(result),"b",1);
- if (size > 2)
- /* for filling the MSBs */
- emitcode("clr","a");
- }
- else{
- emitcode("mov","a,b");
+ /* if any registers used */
+ if (sym->regsUsed)
+ {
+ /* save the registers used */
+ for (i = sym->regsUsed->size; i >= 0; i--)
+ {
+ if (bitVectBitValue (sym->regsUsed, i) ||
+ (mcs51_ptrRegReq && (i == R0_IDX || i == R1_IDX)))
+ emitcode ("pop", "%s", mcs51_regWithIdx (i)->dname);
+ }
+ }
- /* adjust the MSB if left or right neg */
+ }
- /* if one literal */
- if (AOP_TYPE(right) == AOP_LIT){
- /* AND literal negative */
- if((int) floatFromVal (AOP(right)->aopu.aop_lit) < 0){
- /* adjust MSB (c==0 after mul) */
- emitcode("subb","a,%s", aopGet(AOP(left),0,FALSE,FALSE));
- }
- }
- else{
- lbl = newiTempLabel(NULL);
- emitcode("xch","a,%s",aopGet(AOP(right),0,FALSE,FALSE));
- emitcode("cjne","a,#0x80,%05d$", (lbl->key+100));
- emitcode("","%05d$:",(lbl->key+100));
- emitcode("xch","a,%s",aopGet(AOP(right),0,FALSE,FALSE));
- lbl = newiTempLabel(NULL);
- emitcode("jc","%05d$",(lbl->key+100));
- emitcode("subb","a,%s", aopGet(AOP(left),0,FALSE,FALSE));
- emitcode("","%05d$:",(lbl->key+100));
- }
+ /* if debug then send end of function */
+ if (options.debug && currFunc)
+ {
+ _G.debugLine = 1;
+ emitcode ("", "C$%s$%d$%d$%d ==.",
+ FileBaseName (ic->filename), currFunc->lastLine,
+ ic->level, ic->block);
+ if (IS_STATIC (currFunc->etype))
+ emitcode ("", "XF%s$%s$0$0 ==.", moduleName, currFunc->name);
+ else
+ emitcode ("", "XG$%s$0$0 ==.", currFunc->name);
+ _G.debugLine = 0;
+ }
- lbl = newiTempLabel(NULL);
- emitcode("xch","a,%s",aopGet(AOP(left),0,FALSE,FALSE));
- emitcode("cjne","a,#0x80,%05d$", (lbl->key+100));
- emitcode("","%05d$:",(lbl->key+100));
- emitcode("xch","a,%s",aopGet(AOP(left),0,FALSE,FALSE));
- lbl = newiTempLabel(NULL);
- emitcode("jc","%05d$",(lbl->key+100));
- emitcode("subb","a,%s", aopGet(AOP(right),0,FALSE,FALSE));
- emitcode("","%05d$:",(lbl->key+100));
-
- aopPut(AOP(result),"a",1);
- if(size > 2){
- /* get the sign */
- emitcode("rlc","a");
- emitcode("subb","a,acc");
- }
- }
- size -= 2;
- offset = 2;
- if (size > 0)
- while (size--)
- aopPut(AOP(result),"a",offset++);
+ emitcode ("ret", "");
}
+
}
/*-----------------------------------------------------------------*/
-/* genMult - generates code for multiplication */
+/* genRet - generate code for return statement */
/*-----------------------------------------------------------------*/
-static void genMult (iCode *ic)
+static void
+genRet (iCode * ic)
{
- operand *left = IC_LEFT(ic);
- operand *right = IC_RIGHT(ic);
- operand *result= IC_RESULT(ic);
+ int size, offset = 0, pushed = 0;
- /* assign the amsops */
- aopOp (left,ic,FALSE);
- aopOp (right,ic,FALSE);
- aopOp (result,ic,TRUE);
+ D(emitcode ("; genRet",""));
- /* special cases first */
- /* both are bits */
- if (AOP_TYPE(left) == AOP_CRY &&
- AOP_TYPE(right)== AOP_CRY) {
- genMultbits(left,right,result);
- goto release ;
+ /* if we have no return value then
+ just generate the "ret" */
+ if (!IC_LEFT (ic))
+ goto jumpret;
+
+ /* we have something to return then
+ move the return value into place */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ size = AOP_SIZE (IC_LEFT (ic));
+
+ while (size--)
+ {
+ char *l;
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_DPTR)
+ {
+ /* #NOCHANGE */
+ l = aopGet (AOP (IC_LEFT (ic)), offset++,
+ FALSE, TRUE);
+ emitcode ("push", "%s", l);
+ pushed++;
+ }
+ else
+ {
+ l = aopGet (AOP (IC_LEFT (ic)), offset,
+ FALSE, FALSE);
+ if (strcmp (fReturn[offset], l))
+ emitcode ("mov", "%s,%s", fReturn[offset++], l);
+ }
}
- /* if both are of size == 1 */
- if (AOP_SIZE(left) == 1 &&
- AOP_SIZE(right) == 1 ) {
- genMultOneByte(left,right,result);
- goto release ;
+ if (pushed)
+ {
+ while (pushed)
+ {
+ pushed--;
+ if (strcmp (fReturn[pushed], "a"))
+ emitcode ("pop", fReturn[pushed]);
+ else
+ emitcode ("pop", "acc");
+ }
}
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
- /* should have been converted to function call */
- assert(1) ;
+jumpret:
+ /* generate a jump to the return label
+ if the next is not the return statement */
+ if (!(ic->next && ic->next->op == LABEL &&
+ IC_LABEL (ic->next) == returnLabel))
+
+ emitcode ("ljmp", "%05d$", (returnLabel->key + 100));
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
}
/*-----------------------------------------------------------------*/
-/* genDivbits :- division of bits */
+/* genLabel - generates a label */
/*-----------------------------------------------------------------*/
-static void genDivbits (operand *left,
- operand *right,
- operand *result)
+static void
+genLabel (iCode * ic)
{
+ /* special case never generate */
+ if (IC_LABEL (ic) == entryLabel)
+ return;
- char *l;
-
- /* the result must be bit */
- emitcode("mov","b,%s",aopGet(AOP(right),0,FALSE,FALSE));
- l = aopGet(AOP(left),0,FALSE,FALSE);
-
- MOVA(l);
-
- emitcode("div","ab");
- emitcode("rrc","a");
- aopPut(AOP(result),"c",0);
+ emitcode ("", "%05d$:", (IC_LABEL (ic)->key + 100));
}
/*-----------------------------------------------------------------*/
-/* genDivOneByte : 8 bit division */
+/* genGoto - generates a ljmp */
/*-----------------------------------------------------------------*/
-static void genDivOneByte (operand *left,
- operand *right,
- operand *result)
-{
- link *opetype = operandType(result);
- char *l ;
- symbol *lbl ;
- int size,offset;
-
- size = AOP_SIZE(result) - 1;
- offset = 1;
- /* signed or unsigned */
- if (SPEC_USIGN(opetype)) {
- /* unsigned is easy */
- emitcode("mov","b,%s", aopGet(AOP(right),0,FALSE,FALSE));
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("div","ab");
- aopPut(AOP(result),"a",0);
- while (size--)
- aopPut(AOP(result),zero,offset++);
- return ;
- }
-
- /* signed is a little bit more difficult */
-
- /* save the signs of the operands */
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("xrl","a,%s",aopGet(AOP(right),0,FALSE,TRUE));
- emitcode("push","acc"); /* save it on the stack */
-
- /* now sign adjust for both left & right */
- l = aopGet(AOP(right),0,FALSE,FALSE);
- MOVA(l);
- lbl = newiTempLabel(NULL);
- emitcode("jnb","acc.7,%05d$",(lbl->key+100));
- emitcode("cpl","a");
- emitcode("inc","a");
- emitcode("","%05d$:",(lbl->key+100));
- emitcode("mov","b,a");
-
- /* sign adjust left side */
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
-
- lbl = newiTempLabel(NULL);
- emitcode("jnb","acc.7,%05d$",(lbl->key+100));
- emitcode("cpl","a");
- emitcode("inc","a");
- emitcode("","%05d$:",(lbl->key+100));
-
- /* now the division */
- emitcode("div","ab");
- /* we are interested in the lower order
- only */
- emitcode("mov","b,a");
- lbl = newiTempLabel(NULL);
- emitcode("pop","acc");
- /* if there was an over flow we don't
- adjust the sign of the result */
- emitcode("jb","ov,%05d$",(lbl->key+100));
- emitcode("jnb","acc.7,%05d$",(lbl->key+100));
- CLRC;
- emitcode("clr","a");
- emitcode("subb","a,b");
- emitcode("mov","b,a");
- emitcode("","%05d$:",(lbl->key+100));
-
- /* now we are done */
- aopPut(AOP(result),"b",0);
- if(size > 0){
- emitcode("mov","c,b.7");
- emitcode("subb","a,acc");
- }
- while (size--)
- aopPut(AOP(result),"a",offset++);
-
+static void
+genGoto (iCode * ic)
+{
+ emitcode ("ljmp", "%05d$", (IC_LABEL (ic)->key + 100));
}
/*-----------------------------------------------------------------*/
-/* genDiv - generates code for division */
+/* findLabelBackwards: walks back through the iCode chain looking */
+/* for the given label. Returns number of iCode instructions */
+/* between that label and given ic. */
+/* Returns zero if label not found. */
/*-----------------------------------------------------------------*/
-static void genDiv (iCode *ic)
+static int
+findLabelBackwards (iCode * ic, int key)
{
- operand *left = IC_LEFT(ic);
- operand *right = IC_RIGHT(ic);
- operand *result= IC_RESULT(ic);
+ int count = 0;
- /* assign the amsops */
- aopOp (left,ic,FALSE);
- aopOp (right,ic,FALSE);
- aopOp (result,ic,TRUE);
+ while (ic->prev)
+ {
+ ic = ic->prev;
+ count++;
- /* special cases first */
- /* both are bits */
- if (AOP_TYPE(left) == AOP_CRY &&
- AOP_TYPE(right)== AOP_CRY) {
- genDivbits(left,right,result);
- goto release ;
- }
+ /* If we have any pushes or pops, we cannot predict the distance.
+ I don't like this at all, this should be dealt with in the
+ back-end */
+ if (ic->op == IPUSH || ic->op == IPOP) {
+ return 0;
+ }
- /* if both are of size == 1 */
- if (AOP_SIZE(left) == 1 &&
- AOP_SIZE(right) == 1 ) {
- genDivOneByte(left,right,result);
- goto release ;
+ if (ic->op == LABEL && IC_LABEL (ic)->key == key)
+ {
+ return count;
+ }
}
- /* should have been converted to function call */
- assert(1);
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ return 0;
}
/*-----------------------------------------------------------------*/
-/* genModbits :- modulus of bits */
+/* genPlusIncr :- does addition with increment if possible */
/*-----------------------------------------------------------------*/
-static void genModbits (operand *left,
- operand *right,
- operand *result)
+static bool
+genPlusIncr (iCode * ic)
{
+ unsigned int icount;
+ unsigned int size = getDataSize (IC_RESULT (ic));
+
+ /* will try to generate an increment */
+ /* if the right side is not a literal
+ we cannot */
+ if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT)
+ return FALSE;
+
+ /* if the literal value of the right hand side
+ is greater than 4 then it is not worth it */
+ if ((icount = (unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit)) > 4)
+ return FALSE;
+
+ D(emitcode ("; genPlusIncr",""));
+
+ /* if increment >=16 bits in register or direct space */
+ if ((AOP_TYPE(IC_LEFT(ic)) == AOP_REG || AOP_TYPE(IC_LEFT(ic)) == AOP_DIR ) &&
+ sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))) &&
+ (size > 1) &&
+ (icount == 1))
+ {
+ symbol *tlbl;
+ int emitTlbl;
+ int labelRange;
+
+ /* If the next instruction is a goto and the goto target
+ * is < 10 instructions previous to this, we can generate
+ * jumps straight to that target.
+ */
+ if (ic->next && ic->next->op == GOTO
+ && (labelRange = findLabelBackwards (ic, IC_LABEL (ic->next)->key)) != 0
+ && labelRange <= 10)
+ {
+ emitcode (";", "tail increment optimized");
+ tlbl = IC_LABEL (ic->next);
+ emitTlbl = 0;
+ }
+ else
+ {
+ tlbl = newiTempLabel (NULL);
+ emitTlbl = 1;
+ }
+ emitcode ("inc", "%s", aopGet (AOP (IC_RESULT (ic)), LSB, FALSE, FALSE));
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_RESULT (ic)))
+ emitcode ("cjne", "%s,#0x00,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), LSB, FALSE, FALSE),
+ tlbl->key + 100);
+ else
+ {
+ emitcode ("clr", "a");
+ emitcode ("cjne", "a,%s,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), LSB, FALSE, FALSE),
+ tlbl->key + 100);
+ }
+
+ emitcode ("inc", "%s", aopGet (AOP (IC_RESULT (ic)), MSB16, FALSE, FALSE));
+ if (size > 2)
+ {
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_RESULT (ic)))
+ emitcode ("cjne", "%s,#0x00,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), MSB16, FALSE, FALSE),
+ tlbl->key + 100);
+ else
+ emitcode ("cjne", "a,%s,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), MSB16, FALSE, FALSE),
+ tlbl->key + 100);
+
+ emitcode ("inc", "%s", aopGet (AOP (IC_RESULT (ic)), MSB24, FALSE, FALSE));
+ }
+ if (size > 3)
+ {
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_RESULT (ic)))
+ emitcode ("cjne", "%s,#0x00,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), MSB24, FALSE, FALSE),
+ tlbl->key + 100);
+ else
+ {
+ emitcode ("cjne", "a,%s,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), MSB24, FALSE, FALSE),
+ tlbl->key + 100);
+ }
+ emitcode ("inc", "%s", aopGet (AOP (IC_RESULT (ic)), MSB32, FALSE, FALSE));
+ }
- char *l;
+ if (emitTlbl)
+ {
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ return TRUE;
+ }
- /* the result must be bit */
- emitcode("mov","b,%s",aopGet(AOP(right),0,FALSE,FALSE));
- l = aopGet(AOP(left),0,FALSE,FALSE);
+ /* if the sizes are greater than 1 then we cannot */
+ if (AOP_SIZE (IC_RESULT (ic)) > 1 ||
+ AOP_SIZE (IC_LEFT (ic)) > 1)
+ return FALSE;
- MOVA(l);
+ /* we can if the aops of the left & result match or
+ if they are in registers and the registers are the
+ same */
+ if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))))
+ {
- emitcode("div","ab");
- emitcode("mov","a,b");
- emitcode("rrc","a");
- aopPut(AOP(result),"c",0);
-}
+ if (icount > 3)
+ {
+ MOVA (aopGet (AOP (IC_LEFT (ic)), 0, FALSE, FALSE));
+ emitcode ("add", "a,#0x%02x", ((char) icount) & 0xff);
+ aopPut (AOP (IC_RESULT (ic)), "a", 0, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ else
+ {
-/*-----------------------------------------------------------------*/
-/* genModOneByte : 8 bit modulus */
-/*-----------------------------------------------------------------*/
-static void genModOneByte (operand *left,
- operand *right,
- operand *result)
-{
- link *opetype = operandType(result);
- char *l ;
- symbol *lbl ;
-
- /* signed or unsigned */
- if (SPEC_USIGN(opetype)) {
- /* unsigned is easy */
- emitcode("mov","b,%s", aopGet(AOP(right),0,FALSE,FALSE));
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("div","ab");
- aopPut(AOP(result),"b",0);
- return ;
- }
-
- /* signed is a little bit more difficult */
-
- /* save the signs of the operands */
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
-
- emitcode("xrl","a,%s",aopGet(AOP(right),0,FALSE,FALSE));
- emitcode("push","acc"); /* save it on the stack */
-
- /* now sign adjust for both left & right */
- l = aopGet(AOP(right),0,FALSE,FALSE);
- MOVA(l);
-
- lbl = newiTempLabel(NULL);
- emitcode("jnb","acc.7,%05d$",(lbl->key+100));
- emitcode("cpl","a");
- emitcode("inc","a");
- emitcode("","%05d$:",(lbl->key+100));
- emitcode("mov","b,a");
-
- /* sign adjust left side */
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
-
- lbl = newiTempLabel(NULL);
- emitcode("jnb","acc.7,%05d$",(lbl->key+100));
- emitcode("cpl","a");
- emitcode("inc","a");
- emitcode("","%05d$:",(lbl->key+100));
-
- /* now the multiplication */
- emitcode("div","ab");
- /* we are interested in the lower order
- only */
- lbl = newiTempLabel(NULL);
- emitcode("pop","acc");
- /* if there was an over flow we don't
- adjust the sign of the result */
- emitcode("jb","ov,%05d$",(lbl->key+100));
- emitcode("jnb","acc.7,%05d$",(lbl->key+100));
- CLRC ;
- emitcode("clr","a");
- emitcode("subb","a,b");
- emitcode("mov","b,a");
- emitcode("","%05d$:",(lbl->key+100));
-
- /* now we are done */
- aopPut(AOP(result),"b",0);
+ while (icount--)
+ emitcode ("inc", "%s", aopGet (AOP (IC_LEFT (ic)), 0, FALSE, FALSE));
+ }
+ return TRUE;
+ }
+
+ return FALSE;
}
/*-----------------------------------------------------------------*/
-/* genMod - generates code for division */
+/* outBitAcc - output a bit in acc */
/*-----------------------------------------------------------------*/
-static void genMod (iCode *ic)
+static void
+outBitAcc (operand * result)
{
- operand *left = IC_LEFT(ic);
- operand *right = IC_RIGHT(ic);
- operand *result= IC_RESULT(ic);
-
- /* assign the amsops */
- aopOp (left,ic,FALSE);
- aopOp (right,ic,FALSE);
- aopOp (result,ic,TRUE);
-
- /* special cases first */
- /* both are bits */
- if (AOP_TYPE(left) == AOP_CRY &&
- AOP_TYPE(right)== AOP_CRY) {
- genModbits(left,right,result);
- goto release ;
+ symbol *tlbl = newiTempLabel (NULL);
+ /* if the result is a bit */
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
}
-
- /* if both are of size == 1 */
- if (AOP_SIZE(left) == 1 &&
- AOP_SIZE(right) == 1 ) {
- genModOneByte(left,right,result);
- goto release ;
+ else
+ {
+ emitcode ("jz", "%05d$", tlbl->key + 100);
+ emitcode ("mov", "a,%s", one);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outAcc (result);
}
-
- /* should have been converted to function call */
- assert(1);
-
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
}
/*-----------------------------------------------------------------*/
-/* genIfxJump :- will create a jump depending on the ifx */
+/* genPlusBits - generates code for addition of two bits */
/*-----------------------------------------------------------------*/
-static void genIfxJump (iCode *ic, char *jval)
+static void
+genPlusBits (iCode * ic)
{
- symbol *jlbl ;
- symbol *tlbl = newiTempLabel(NULL);
- char *inst;
+ D(emitcode ("; genPlusBits",""));
- /* if true label then we jump if condition
- supplied is true */
- if ( IC_TRUE(ic) ) {
- jlbl = IC_TRUE(ic);
- inst = ((strcmp(jval,"a") == 0 ? "jz" :
- (strcmp(jval,"c") == 0 ? "jnc" : "jnb" )));
- }
- else {
- /* false label is present */
- jlbl = IC_FALSE(ic) ;
- inst = ((strcmp(jval,"a") == 0 ? "jnz" :
- (strcmp(jval,"c") == 0 ? "jc" : "jb" )));
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY)
+ {
+ symbol *lbl = newiTempLabel (NULL);
+ emitcode ("mov", "c,%s", AOP (IC_LEFT (ic))->aopu.aop_dir);
+ emitcode ("jnb", "%s,%05d$", AOP (IC_RIGHT (ic))->aopu.aop_dir, (lbl->key + 100));
+ emitcode ("cpl", "c");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ outBitC (IC_RESULT (ic));
+ }
+ else
+ {
+ emitcode ("clr", "a");
+ emitcode ("mov", "c,%s", AOP (IC_LEFT (ic))->aopu.aop_dir);
+ emitcode ("rlc", "a");
+ emitcode ("mov", "c,%s", AOP (IC_RIGHT (ic))->aopu.aop_dir);
+ emitcode ("addc", "a,#0x00");
+ outAcc (IC_RESULT (ic));
}
- if (strcmp(inst,"jb") == 0 || strcmp(inst,"jnb") == 0)
- emitcode(inst,"%s,%05d$",jval,(tlbl->key+100));
- else
- emitcode(inst,"%05d$",tlbl->key+100);
- emitcode("ljmp","%05d$",jlbl->key+100);
- emitcode("","%05d$:",tlbl->key+100);
-
- /* mark the icode as generated */
- ic->generated = 1;
}
-/*-----------------------------------------------------------------*/
-/* genCmp :- greater or less than comparison */
-/*-----------------------------------------------------------------*/
-static void genCmp (operand *left,operand *right,
- operand *result, iCode *ifx, int sign)
+#if 0
+/* This is the original version of this code.
+
+ * This is being kept around for reference,
+ * because I am not entirely sure I got it right...
+ */
+static void
+adjustArithmeticResult (iCode * ic)
+{
+ if (AOP_SIZE (IC_RESULT (ic)) == 3 &&
+ AOP_SIZE (IC_LEFT (ic)) == 3 &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic))))
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_LEFT (ic)), 2, FALSE, FALSE),
+ 2,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
+
+ if (AOP_SIZE (IC_RESULT (ic)) == 3 &&
+ AOP_SIZE (IC_RIGHT (ic)) == 3 &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_RIGHT (ic))))
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_RIGHT (ic)), 2, FALSE, FALSE),
+ 2,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
+
+ if (AOP_SIZE (IC_RESULT (ic)) == 3 &&
+ AOP_SIZE (IC_LEFT (ic)) < 3 &&
+ AOP_SIZE (IC_RIGHT (ic)) < 3 &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic))) &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_RIGHT (ic))))
+ {
+ char buffer[5];
+ sprintf (buffer, "#%d", pointerCode (getSpec (operandType (IC_LEFT (ic)))));
+ aopPut (AOP (IC_RESULT (ic)), buffer, 2, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+}
+#else
+/* This is the pure and virtuous version of this code.
+ * I'm pretty certain it's right, but not enough to toss the old
+ * code just yet...
+ */
+static void
+adjustArithmeticResult (iCode * ic)
{
- int size, offset = 0 ;
- unsigned long lit = 0L;
+ if (opIsGptr (IC_RESULT (ic)) &&
+ opIsGptr (IC_LEFT (ic)) &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic))))
+ {
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_LEFT (ic)), GPTRSIZE - 1, FALSE, FALSE),
+ GPTRSIZE - 1,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
- /* if left & right are bit variables */
- if (AOP_TYPE(left) == AOP_CRY &&
- AOP_TYPE(right) == AOP_CRY ) {
- emitcode("mov","c,%s",AOP(right)->aopu.aop_dir);
- emitcode("anl","c,/%s",AOP(left)->aopu.aop_dir);
- } else {
- /* subtract right from left if at the
- end the carry flag is set then we know that
- left is greater than right */
- size = max(AOP_SIZE(left),AOP_SIZE(right));
-
- /* if unsigned char cmp with lit, do cjne left,#right,zz */
- if((size == 1) && !sign &&
- (AOP_TYPE(right) == AOP_LIT && AOP_TYPE(left) != AOP_DIR )){
- symbol *lbl = newiTempLabel(NULL);
- emitcode("cjne","%s,%s,%05d$",
- aopGet(AOP(left),offset,FALSE,FALSE),
- aopGet(AOP(right),offset,FALSE,FALSE),
- lbl->key+100);
- emitcode("","%05d$:",lbl->key+100);
- } else {
- if(AOP_TYPE(right) == AOP_LIT){
- lit = (unsigned long)floatFromVal(AOP(right)->aopu.aop_lit);
- /* optimize if(x < 0) or if(x >= 0) */
- if(lit == 0L){
- if(!sign){
- CLRC;
- }
- else{
- MOVA(aopGet(AOP(left),AOP_SIZE(left)-1,FALSE,FALSE));
- if(!(AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)) && ifx){
- genIfxJump (ifx,"acc.7");
- return;
- }
- else
- emitcode("rlc","a");
- }
- goto release;
- }
- }
- CLRC;
- while (size--) {
- MOVA(aopGet(AOP(left),offset,FALSE,FALSE));
- if (sign && size == 0) {
- emitcode("xrl","a,#0x80");
- if (AOP_TYPE(right) == AOP_LIT){
- unsigned long lit = (unsigned long)
- floatFromVal(AOP(right)->aopu.aop_lit);
- emitcode("subb","a,#0x%02x",
- 0x80 ^ (unsigned int)((lit >> (offset*8)) & 0x0FFL));
- } else {
- emitcode("mov","b,%s",aopGet(AOP(right),offset++,FALSE,FALSE));
- emitcode("xrl","b,#0x80");
- emitcode("subb","a,b");
- }
- } else
- emitcode("subb","a,%s",aopGet(AOP(right),offset++,FALSE,FALSE));
- }
- }
+ if (opIsGptr (IC_RESULT (ic)) &&
+ opIsGptr (IC_RIGHT (ic)) &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_RIGHT (ic))))
+ {
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_RIGHT (ic)), GPTRSIZE - 1, FALSE, FALSE),
+ GPTRSIZE - 1,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
}
-release:
- if (AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)) {
- outBitC(result);
- } else {
- /* if the result is used in the next
- ifx conditional branch then generate
- code a little differently */
- if (ifx )
- genIfxJump (ifx,"c");
- else
- outBitC(result);
- /* leave the result in acc */
+ if (opIsGptr (IC_RESULT (ic)) &&
+ AOP_SIZE (IC_LEFT (ic)) < GPTRSIZE &&
+ AOP_SIZE (IC_RIGHT (ic)) < GPTRSIZE &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic))) &&
+ !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_RIGHT (ic))))
+ {
+ char buffer[5];
+ sprintf (buffer, "#%d", pointerCode (getSpec (operandType (IC_LEFT (ic)))));
+ aopPut (AOP (IC_RESULT (ic)), buffer, GPTRSIZE - 1, isOperandVolatile (IC_RESULT (ic), FALSE));
}
}
+#endif
/*-----------------------------------------------------------------*/
-/* genCmpGt :- greater than comparison */
+/* genPlus - generates code for addition */
/*-----------------------------------------------------------------*/
-static void genCmpGt (iCode *ic, iCode *ifx)
+static void
+genPlus (iCode * ic)
{
- operand *left, *right, *result;
- link *letype , *retype;
- int sign ;
+ int size, offset = 0;
+ int skip_bytes = 0;
+ char *add = "add";
+ asmop *leftOp, *rightOp;
+ operand * op;
+
+ /* special cases :- */
+
+ D(emitcode ("; genPlus",""));
+
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RIGHT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
+
+ /* if literal, literal on the right or
+ if left requires ACC or right is already
+ in ACC */
+ if ((AOP_TYPE (IC_LEFT (ic)) == AOP_LIT) ||
+ (AOP_NEEDSACC (IC_LEFT (ic))) ||
+ AOP_TYPE (IC_RIGHT (ic)) == AOP_ACC)
+ {
+ operand *t = IC_RIGHT (ic);
+ IC_RIGHT (ic) = IC_LEFT (ic);
+ IC_LEFT (ic) = t;
+ }
+
+ /* if both left & right are in bit
+ space */
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY &&
+ AOP_TYPE (IC_RIGHT (ic)) == AOP_CRY)
+ {
+ genPlusBits (ic);
+ goto release;
+ }
+
+ /* if left in bit space & right literal */
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY &&
+ AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT)
+ {
+ emitcode ("mov", "c,%s", AOP (IC_LEFT (ic))->aopu.aop_dir);
+ /* if result in bit space */
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY)
+ {
+ if ((unsigned long) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit) != 0L)
+ emitcode ("cpl", "c");
+ outBitC (IC_RESULT (ic));
+ }
+ else
+ {
+ size = getDataSize (IC_RESULT (ic));
+ while (size--)
+ {
+ MOVA (aopGet (AOP (IC_RIGHT (ic)), offset, FALSE, FALSE));
+ emitcode ("addc", "a,#00");
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ }
+ goto release;
+ }
+
+ /* if I can do an increment instead
+ of add then GOOD for ME */
+ if (genPlusIncr (ic) == TRUE)
+ goto release;
+
+ size = getDataSize (IC_RESULT (ic));
+ leftOp = AOP(IC_LEFT(ic));
+ rightOp = AOP(IC_RIGHT(ic));
+ op=IC_LEFT(ic);
+
+ /* if this is an add for an array access
+ at a 256 byte boundary */
+ if ( 2 == size
+ && AOP_TYPE (op) == AOP_IMMD
+ && IS_SYMOP (op)
+ && IS_SPEC (OP_SYM_ETYPE (op))
+ && SPEC_ABSA (OP_SYM_ETYPE (op))
+ && (SPEC_ADDR (OP_SYM_ETYPE (op)) & 0xff) == 0
+ )
+ {
+ D(emitcode ("; genPlus aligned array",""));
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (rightOp, 0, FALSE, FALSE),
+ 0,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
+
+ if( 1 == getDataSize (IC_RIGHT (ic)) )
+ {
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (leftOp, 1, FALSE, FALSE),
+ 1,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ else
+ {
+ MOVA (aopGet (AOP (IC_LEFT (ic)), 1, FALSE, FALSE));
+ emitcode ("add", "a,%s", aopGet (rightOp, 1, FALSE, FALSE));
+ aopPut (AOP (IC_RESULT (ic)), "a", 1, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ goto release;
+ }
- left = IC_LEFT(ic);
- right= IC_RIGHT(ic);
- result = IC_RESULT(ic);
+ /* if the lower bytes of a literal are zero skip the addition */
+ if (AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT )
+ {
+ while ((0 == ((unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit) & (0xff << skip_bytes*8))) &&
+ (skip_bytes+1 < size))
+ {
+ skip_bytes++;
+ }
+ if (skip_bytes)
+ D(emitcode ("; genPlus shortcut",""));
+ }
- letype = getSpec(operandType(left));
- retype =getSpec(operandType(right));
- sign = !(SPEC_USIGN(letype) | SPEC_USIGN(retype));
- /* assign the amsops */
- aopOp (left,ic,FALSE);
- aopOp (right,ic,FALSE);
- aopOp (result,ic,TRUE);
+ while (size--)
+ {
+ if( offset >= skip_bytes )
+ {
+ if (aopGetUsesAcc (leftOp, offset) && aopGetUsesAcc (rightOp, offset))
+ {
+ emitcode("mov", "b,a");
+ MOVA (aopGet (leftOp, offset, FALSE, TRUE));
+ emitcode("xch", "a,b");
+ MOVA (aopGet (rightOp, offset, FALSE, TRUE));
+ emitcode (add, "a,b");
+ }
+ else if (aopGetUsesAcc (leftOp, offset))
+ {
+ MOVA (aopGet (leftOp, offset, FALSE, TRUE));
+ emitcode (add, "a,%s", aopGet (rightOp, offset, FALSE, TRUE));
+ }
+ else
+ {
+ MOVA (aopGet (rightOp, offset, FALSE, TRUE));
+ emitcode (add, "a,%s", aopGet (leftOp, offset, FALSE, TRUE));
+ }
+ aopPut (AOP (IC_RESULT (ic)), "a", offset, isOperandVolatile (IC_RESULT (ic), FALSE));
+ add = "addc"; /* further adds must propagate carry */
+ }
+ else
+ {
+ if( !sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))) ||
+ isOperandVolatile (IC_RESULT (ic), FALSE))
+ {
+ /* just move */
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (leftOp, offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ }
+ offset++;
+ }
- genCmp(right, left, result, ifx, sign);
+ adjustArithmeticResult (ic);
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+release:
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (IC_RIGHT (ic), NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genCmpLt - less than comparisons */
+/* genMinusDec :- does subtraction with deccrement if possible */
/*-----------------------------------------------------------------*/
-static void genCmpLt (iCode *ic, iCode *ifx)
+static bool
+genMinusDec (iCode * ic)
{
- operand *left, *right, *result;
- link *letype , *retype;
- int sign ;
+ unsigned int icount;
+ unsigned int size = getDataSize (IC_RESULT (ic));
+
+ /* will try to generate an increment */
+ /* if the right side is not a literal
+ we cannot */
+ if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT)
+ return FALSE;
+
+ /* if the literal value of the right hand side
+ is greater than 4 then it is not worth it */
+ if ((icount = (unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit)) > 4)
+ return FALSE;
+
+ D(emitcode ("; genMinusDec",""));
+
+ /* if decrement >=16 bits in register or direct space */
+ if ((AOP_TYPE(IC_LEFT(ic)) == AOP_REG || AOP_TYPE(IC_LEFT(ic)) == AOP_DIR) &&
+ sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))) &&
+ (size > 1) &&
+ (icount == 1))
+ {
+ symbol *tlbl;
+ int emitTlbl;
+ int labelRange;
+
+ /* If the next instruction is a goto and the goto target
+ * is <= 10 instructions previous to this, we can generate
+ * jumps straight to that target.
+ */
+ if (ic->next && ic->next->op == GOTO
+ && (labelRange = findLabelBackwards (ic, IC_LABEL (ic->next)->key)) != 0
+ && labelRange <= 10)
+ {
+ emitcode (";", "tail decrement optimized");
+ tlbl = IC_LABEL (ic->next);
+ emitTlbl = 0;
+ }
+ else
+ {
+ tlbl = newiTempLabel (NULL);
+ emitTlbl = 1;
+ }
+
+ emitcode ("dec", "%s", aopGet (AOP (IC_RESULT (ic)), LSB, FALSE, FALSE));
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_RESULT (ic)))
+ emitcode ("cjne", "%s,#0xff,%05d$"
+ ,aopGet (AOP (IC_RESULT (ic)), LSB, FALSE, FALSE)
+ ,tlbl->key + 100);
+ else
+ {
+ emitcode ("mov", "a,#0xff");
+ emitcode ("cjne", "a,%s,%05d$"
+ ,aopGet (AOP (IC_RESULT (ic)), LSB, FALSE, FALSE)
+ ,tlbl->key + 100);
+ }
+ emitcode ("dec", "%s", aopGet (AOP (IC_RESULT (ic)), MSB16, FALSE, FALSE));
+ if (size > 2)
+ {
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_RESULT (ic)))
+ emitcode ("cjne", "%s,#0xff,%05d$"
+ ,aopGet (AOP (IC_RESULT (ic)), MSB16, FALSE, FALSE)
+ ,tlbl->key + 100);
+ else
+ {
+ emitcode ("cjne", "a,%s,%05d$"
+ ,aopGet (AOP (IC_RESULT (ic)), MSB16, FALSE, FALSE)
+ ,tlbl->key + 100);
+ }
+ emitcode ("dec", "%s", aopGet (AOP (IC_RESULT (ic)), MSB24, FALSE, FALSE));
+ }
+ if (size > 3)
+ {
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG ||
+ IS_AOP_PREG (IC_RESULT (ic)))
+ emitcode ("cjne", "%s,#0xff,%05d$"
+ ,aopGet (AOP (IC_RESULT (ic)), MSB24, FALSE, FALSE)
+ ,tlbl->key + 100);
+ else
+ {
+ emitcode ("cjne", "a,%s,%05d$"
+ ,aopGet (AOP (IC_RESULT (ic)), MSB24, FALSE, FALSE)
+ ,tlbl->key + 100);
+ }
+ emitcode ("dec", "%s", aopGet (AOP (IC_RESULT (ic)), MSB32, FALSE, FALSE));
+ }
+ if (emitTlbl)
+ {
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ return TRUE;
+ }
- left = IC_LEFT(ic);
- right= IC_RIGHT(ic);
- result = IC_RESULT(ic);
+ /* if the sizes are greater than 1 then we cannot */
+ if (AOP_SIZE (IC_RESULT (ic)) > 1 ||
+ AOP_SIZE (IC_LEFT (ic)) > 1)
+ return FALSE;
- letype = getSpec(operandType(left));
- retype =getSpec(operandType(right));
- sign = !(SPEC_USIGN(letype) | SPEC_USIGN(retype));
+ /* we can if the aops of the left & result match or
+ if they are in registers and the registers are the
+ same */
+ if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))))
+ {
- /* assign the amsops */
- aopOp (left,ic,FALSE);
- aopOp (right,ic,FALSE);
- aopOp (result,ic,TRUE);
+ while (icount--)
+ emitcode ("dec", "%s", aopGet (AOP (IC_RESULT (ic)), 0, FALSE, FALSE));
- genCmp(left, right, result, ifx, sign);
+ return TRUE;
+ }
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ return FALSE;
}
/*-----------------------------------------------------------------*/
-/* gencjneshort - compare and jump if not equal */
+/* addSign - complete with sign */
/*-----------------------------------------------------------------*/
-static void gencjneshort(operand *left, operand *right, symbol *lbl)
+static void
+addSign (operand * result, int offset, int sign)
{
- int size = max(AOP_SIZE(left),AOP_SIZE(right));
- int offset = 0;
- unsigned long lit = 0L;
-
- /* if the left side is a literal or
- if the right is in a pointer register and left
- is not */
- if ((AOP_TYPE(left) == AOP_LIT) ||
- (IS_AOP_PREG(right) && !IS_AOP_PREG(left))) {
- operand *t = right;
- right = left;
- left = t;
- }
- if(AOP_TYPE(right) == AOP_LIT)
- lit = (unsigned long)floatFromVal(AOP(right)->aopu.aop_lit);
-
- /* if the right side is a literal then anything goes */
- if (AOP_TYPE(right) == AOP_LIT &&
- AOP_TYPE(left) != AOP_DIR ) {
- while (size--) {
- emitcode("cjne","%s,%s,%05d$",
- aopGet(AOP(left),offset,FALSE,FALSE),
- aopGet(AOP(right),offset,FALSE,FALSE),
- lbl->key+100);
- offset++;
- }
- }
-
- /* if the right side is in a register or in direct space or
- if the left is a pointer register & right is not */
- else if (AOP_TYPE(right) == AOP_REG ||
- AOP_TYPE(right) == AOP_DIR ||
- (AOP_TYPE(left) == AOP_DIR && AOP_TYPE(right) == AOP_LIT) ||
- (IS_AOP_PREG(left) && !IS_AOP_PREG(right))) {
- while (size--) {
- MOVA(aopGet(AOP(left),offset,FALSE,FALSE));
- if((AOP_TYPE(left) == AOP_DIR && AOP_TYPE(right) == AOP_LIT) &&
- ((unsigned int)((lit >> (offset*8)) & 0x0FFL) == 0))
- emitcode("jnz","%05d$",lbl->key+100);
- else
- emitcode("cjne","a,%s,%05d$",
- aopGet(AOP(right),offset,FALSE,TRUE),
- lbl->key+100);
- offset++;
- }
- } else {
- /* right is a pointer reg need both a & b */
- while(size--) {
- char *l = aopGet(AOP(left),offset,FALSE,FALSE);
- if(strcmp(l,"b"))
- emitcode("mov","b,%s",l);
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("cjne","a,b,%05d$",lbl->key+100);
- offset++;
- }
+ int size = (getDataSize (result) - offset);
+ if (size > 0)
+ {
+ if (sign)
+ {
+ emitcode ("rlc", "a");
+ emitcode ("subb", "a,acc");
+ while (size--)
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ }
+ else
+ while (size--)
+ aopPut (AOP (result), zero, offset++, isOperandVolatile (result, FALSE));
}
}
/*-----------------------------------------------------------------*/
-/* gencjne - compare and jump if not equal */
+/* genMinusBits - generates code for subtraction of two bits */
/*-----------------------------------------------------------------*/
-static void gencjne(operand *left, operand *right, symbol *lbl)
+static void
+genMinusBits (iCode * ic)
{
- symbol *tlbl = newiTempLabel(NULL);
-
- gencjneshort(left, right, lbl);
+ symbol *lbl = newiTempLabel (NULL);
- emitcode("mov","a,%s",one);
- emitcode("sjmp","%05d$",tlbl->key+100);
- emitcode("","%05d$:",lbl->key+100);
- emitcode("clr","a");
- emitcode("","%05d$:",tlbl->key+100);
-}
+ D(emitcode ("; genMinusBits",""));
-/*-----------------------------------------------------------------*/
-/* genCmpEq - generates code for equal to */
-/*-----------------------------------------------------------------*/
-static void genCmpEq (iCode *ic, iCode *ifx)
-{
- operand *left, *right, *result;
-
- aopOp((left=IC_LEFT(ic)),ic,FALSE);
- aopOp((right=IC_RIGHT(ic)),ic,FALSE);
- aopOp((result=IC_RESULT(ic)),ic,TRUE);
-
- /* if literal, literal on the right or
- if the right is in a pointer register and left
- is not */
- if ((AOP_TYPE(IC_LEFT(ic)) == AOP_LIT) ||
- (IS_AOP_PREG(right) && !IS_AOP_PREG(left))) {
- operand *t = IC_RIGHT(ic);
- IC_RIGHT(ic) = IC_LEFT(ic);
- IC_LEFT(ic) = t;
- }
-
- if(ifx && !AOP_SIZE(result)){
- symbol *tlbl;
- /* if they are both bit variables */
- if (AOP_TYPE(left) == AOP_CRY &&
- ((AOP_TYPE(right) == AOP_CRY) || (AOP_TYPE(right) == AOP_LIT))) {
- if(AOP_TYPE(right) == AOP_LIT){
- unsigned long lit = (unsigned long)floatFromVal(AOP(IC_RIGHT(ic))->aopu.aop_lit);
- if(lit == 0L){
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("cpl","c");
- } else if(lit == 1L) {
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- } else {
- emitcode("clr","c");
- }
- /* AOP_TYPE(right) == AOP_CRY */
- } else {
- symbol *lbl = newiTempLabel(NULL);
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("jb","%s,%05d$",AOP(right)->aopu.aop_dir,(lbl->key+100));
- emitcode("cpl","c");
- emitcode("","%05d$:",(lbl->key+100));
- }
- /* if true label then we jump if condition
- supplied is true */
- tlbl = newiTempLabel(NULL);
- if ( IC_TRUE(ifx) ) {
- emitcode("jnc","%05d$",tlbl->key+100);
- emitcode("ljmp","%05d$",IC_TRUE(ifx)->key+100);
- } else {
- emitcode("jc","%05d$",tlbl->key+100);
- emitcode("ljmp","%05d$",IC_FALSE(ifx)->key+100);
- }
- emitcode("","%05d$:",tlbl->key+100);
- } else {
- tlbl = newiTempLabel(NULL);
- gencjneshort(left, right, tlbl);
- if ( IC_TRUE(ifx) ) {
- emitcode("ljmp","%05d$",IC_TRUE(ifx)->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- } else {
- symbol *lbl = newiTempLabel(NULL);
- emitcode("sjmp","%05d$",lbl->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- emitcode("ljmp","%05d$",IC_FALSE(ifx)->key+100);
- emitcode("","%05d$:",lbl->key+100);
- }
- }
- /* mark the icode as generated */
- ifx->generated = 1;
- goto release ;
- }
-
- /* if they are both bit variables */
- if (AOP_TYPE(left) == AOP_CRY &&
- ((AOP_TYPE(right) == AOP_CRY) || (AOP_TYPE(right) == AOP_LIT))) {
- if(AOP_TYPE(right) == AOP_LIT){
- unsigned long lit = (unsigned long)floatFromVal(AOP(IC_RIGHT(ic))->aopu.aop_lit);
- if(lit == 0L){
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("cpl","c");
- } else if(lit == 1L) {
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- } else {
- emitcode("clr","c");
- }
- /* AOP_TYPE(right) == AOP_CRY */
- } else {
- symbol *lbl = newiTempLabel(NULL);
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("jb","%s,%05d$",AOP(right)->aopu.aop_dir,(lbl->key+100));
- emitcode("cpl","c");
- emitcode("","%05d$:",(lbl->key+100));
- }
- /* c = 1 if egal */
- if (AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)){
- outBitC(result);
- goto release ;
- }
- if (ifx) {
- genIfxJump (ifx,"c");
- goto release ;
- }
- /* if the result is used in an arithmetic operation
- then put the result in place */
- outBitC(result);
- } else {
- gencjne(left,right,newiTempLabel(NULL));
- if (AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)) {
- aopPut(AOP(result),"a",0);
- goto release ;
- }
- if (ifx) {
- genIfxJump (ifx,"a");
- goto release ;
- }
- /* if the result is used in an arithmetic operation
- then put the result in place */
- if (AOP_TYPE(result) != AOP_CRY)
- outAcc(result);
- /* leave the result in acc */
+ if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", AOP (IC_LEFT (ic))->aopu.aop_dir);
+ emitcode ("jnb", "%s,%05d$", AOP (IC_RIGHT (ic))->aopu.aop_dir, (lbl->key + 100));
+ emitcode ("cpl", "c");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ outBitC (IC_RESULT (ic));
+ }
+ else
+ {
+ emitcode ("mov", "c,%s", AOP (IC_RIGHT (ic))->aopu.aop_dir);
+ emitcode ("subb", "a,acc");
+ emitcode ("jnb", "%s,%05d$", AOP (IC_LEFT (ic))->aopu.aop_dir, (lbl->key + 100));
+ emitcode ("inc", "a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ aopPut (AOP (IC_RESULT (ic)), "a", 0, isOperandVolatile (IC_RESULT (ic), FALSE));
+ addSign (IC_RESULT (ic), MSB16, SPEC_USIGN (getSpec (operandType (IC_RESULT (ic)))));
}
-
-release:
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
}
/*-----------------------------------------------------------------*/
-/* ifxForOp - returns the icode containing the ifx for operand */
+/* genMinus - generates code for subtraction */
/*-----------------------------------------------------------------*/
-static iCode *ifxForOp ( operand *op, iCode *ic )
+static void
+genMinus (iCode * ic)
{
- /* if true symbol then needs to be assigned */
- if (IS_TRUE_SYMOP(op))
- return NULL ;
-
- /* if this has register type condition and
- the next instruction is ifx with the same operand
- and live to of the operand is upto the ifx only then */
- if (ic->next &&
- ic->next->op == IFX &&
- IC_COND(ic->next)->key == op->key &&
- OP_SYMBOL(op)->liveTo <= ic->next->seq )
- return ic->next;
+ int size, offset = 0;
- return NULL;
-}
-/*-----------------------------------------------------------------*/
-/* genAndOp - for && operation */
-/*-----------------------------------------------------------------*/
-static void genAndOp (iCode *ic)
-{
- operand *left,*right, *result;
- symbol *tlbl;
+ D(emitcode ("; genMinus",""));
- /* note here that && operations that are in an
- if statement are taken away by backPatchLabels
- only those used in arthmetic operations remain */
- aopOp((left=IC_LEFT(ic)),ic,FALSE);
- aopOp((right=IC_RIGHT(ic)),ic,FALSE);
- aopOp((result=IC_RESULT(ic)),ic,FALSE);
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RIGHT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
- /* if both are bit variables */
- if (AOP_TYPE(left) == AOP_CRY &&
- AOP_TYPE(right) == AOP_CRY ) {
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("anl","c,%s",AOP(right)->aopu.aop_dir);
- outBitC(result);
- } else {
- tlbl = newiTempLabel(NULL);
- toBoolean(left);
- emitcode("jz","%05d$",tlbl->key+100);
- toBoolean(right);
- emitcode("","%05d$:",tlbl->key+100);
- outBitAcc(result);
+ /* special cases :- */
+ /* if both left & right are in bit space */
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY &&
+ AOP_TYPE (IC_RIGHT (ic)) == AOP_CRY)
+ {
+ genMinusBits (ic);
+ goto release;
}
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
-}
+ /* if I can do an decrement instead
+ of subtract then GOOD for ME */
+ if (genMinusDec (ic) == TRUE)
+ goto release;
+ size = getDataSize (IC_RESULT (ic));
-/*-----------------------------------------------------------------*/
-/* genOrOp - for || operation */
-/*-----------------------------------------------------------------*/
-static void genOrOp (iCode *ic)
-{
- operand *left,*right, *result;
- symbol *tlbl;
+ /* if literal, add a,#-lit, else normal subb */
+ if (AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT)
+ {
+ unsigned long lit = 0L;
- /* note here that || operations that are in an
- if statement are taken away by backPatchLabels
- only those used in arthmetic operations remain */
- aopOp((left=IC_LEFT(ic)),ic,FALSE);
- aopOp((right=IC_RIGHT(ic)),ic,FALSE);
- aopOp((result=IC_RESULT(ic)),ic,FALSE);
+ lit = (unsigned long) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit);
+ lit = -(long) lit;
- /* if both are bit variables */
- if (AOP_TYPE(left) == AOP_CRY &&
- AOP_TYPE(right) == AOP_CRY ) {
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("orl","c,%s",AOP(right)->aopu.aop_dir);
- outBitC(result);
- } else {
- tlbl = newiTempLabel(NULL);
- toBoolean(left);
- emitcode("jnz","%05d$",tlbl->key+100);
- toBoolean(right);
- emitcode("","%05d$:",tlbl->key+100);
- outBitAcc(result);
+ while (size--)
+ {
+ MOVA (aopGet (AOP (IC_LEFT (ic)), offset, FALSE, FALSE));
+ /* first add without previous c */
+ if (!offset) {
+ if (!size && lit== (unsigned long) -1) {
+ emitcode ("dec", "a");
+ } else {
+ emitcode ("add", "a,#0x%02x",
+ (unsigned int) (lit & 0x0FFL));
+ }
+ } else {
+ emitcode ("addc", "a,#0x%02x",
+ (unsigned int) ((lit >> (offset * 8)) & 0x0FFL));
+ }
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ }
+ else
+ {
+ asmop *leftOp, *rightOp;
+
+ leftOp = AOP(IC_LEFT(ic));
+ rightOp = AOP(IC_RIGHT(ic));
+
+ while (size--)
+ {
+ if (aopGetUsesAcc(rightOp, offset)) {
+ wassertl(!aopGetUsesAcc(leftOp, offset), "accumulator clash");
+ MOVA (aopGet(rightOp, offset, FALSE, TRUE));
+ if (offset == 0) {
+ emitcode( "setb", "c");
+ }
+ emitcode("subb", "a,%s", aopGet(leftOp, offset, FALSE, TRUE));
+ emitcode("cpl", "a");
+ } else {
+ MOVA (aopGet (leftOp, offset, FALSE, FALSE));
+ if (offset == 0)
+ CLRC;
+ emitcode ("subb", "a,%s",
+ aopGet(rightOp, offset, FALSE, TRUE));
+ }
+
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
}
+
+
+ adjustArithmeticResult (ic);
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+release:
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (IC_RIGHT (ic), NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
+
/*-----------------------------------------------------------------*/
-/* isLiteralBit - test if lit == 2^n */
+/* genMultbits :- multiplication of bits */
/*-----------------------------------------------------------------*/
-static int isLiteralBit(unsigned long lit)
+static void
+genMultbits (operand * left,
+ operand * right,
+ operand * result)
{
- unsigned long pw[32] = {1L,2L,4L,8L,16L,32L,64L,128L,
- 0x100L,0x200L,0x400L,0x800L,
- 0x1000L,0x2000L,0x4000L,0x8000L,
- 0x10000L,0x20000L,0x40000L,0x80000L,
- 0x100000L,0x200000L,0x400000L,0x800000L,
- 0x1000000L,0x2000000L,0x4000000L,0x8000000L,
- 0x10000000L,0x20000000L,0x40000000L,0x80000000L};
- int idx;
-
- for(idx = 0; idx < 32; idx++)
- if(lit == pw[idx])
- return idx+1;
- return 0;
+ D(emitcode ("; genMultbits",""));
+
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("anl", "c,%s", AOP (right)->aopu.aop_dir);
+ outBitC (result);
}
+
/*-----------------------------------------------------------------*/
-/* continueIfTrue - */
+/* genMultOneByte : 8*8=8/16 bit multiplication */
/*-----------------------------------------------------------------*/
-static void continueIfTrue (iCode *ic)
+static void
+genMultOneByte (operand * left,
+ operand * right,
+ operand * result)
{
- if(IC_TRUE(ic))
- emitcode("ljmp","%05d$",IC_TRUE(ic)->key+100);
- ic->generated = 1;
+ sym_link *opetype = operandType (result);
+ symbol *lbl;
+ int size=AOP_SIZE(result);
+
+ D(emitcode ("; genMultOneByte",""));
+
+ if (size<1 || size>2) {
+ // this should never happen
+ fprintf (stderr, "size!=1||2 (%d) in %s at line:%d \n",
+ AOP_SIZE(result), __FILE__, lineno);
+ exit (1);
+ }
+
+ /* (if two literals: the value is computed before) */
+ /* if one literal, literal on the right */
+ if (AOP_TYPE (left) == AOP_LIT)
+ {
+ operand *t = right;
+ right = left;
+ left = t;
+ //emitcode (";", "swapped left and right");
+ }
+
+ if (SPEC_USIGN(opetype)
+ // ignore the sign of left and right, what else can we do?
+ || (SPEC_USIGN(operandType(left)) &&
+ SPEC_USIGN(operandType(right)))) {
+ // just an unsigned 8*8=8/16 multiply
+ //emitcode (";","unsigned");
+ // TODO: check for accumulator clash between left & right aops?
+
+ if( AOP_TYPE(right)==AOP_LIT ){
+ // moving to accumulator first helps peepholes
+ MOVA (aopGet (AOP (left), 0, FALSE, FALSE));
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ } else {
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ MOVA (aopGet (AOP (left), 0, FALSE, FALSE));
+ }
+
+ emitcode ("mul", "ab");
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ if (size==2) {
+ aopPut (AOP (result), "b", 1, isOperandVolatile (result, FALSE));
+ }
+ return;
+ }
+
+ // we have to do a signed multiply
+
+ //emitcode (";", "signed");
+ emitcode ("clr", "F0"); // reset sign flag
+ MOVA (aopGet (AOP (left), 0, FALSE, FALSE));
+
+ lbl=newiTempLabel(NULL);
+ emitcode ("jnb", "acc.7,%05d$", lbl->key+100);
+ // left side is negative, 8-bit two's complement, this fails for -128
+ emitcode ("setb", "F0"); // set sign flag
+ emitcode ("cpl", "a");
+ emitcode ("inc", "a");
+
+ emitcode ("", "%05d$:", lbl->key+100);
+
+ /* if literal */
+ if (AOP_TYPE(right)==AOP_LIT) {
+ signed char val=(signed char)floatFromVal (AOP (right)->aopu.aop_lit);
+ /* AND literal negative */
+ if (val < 0) {
+ emitcode ("cpl", "F0"); // complement sign flag
+ emitcode ("mov", "b,#0x%02x", -val);
+ } else {
+ emitcode ("mov", "b,#0x%02x", val);
+ }
+ } else {
+ lbl=newiTempLabel(NULL);
+ emitcode ("mov", "b,a");
+ emitcode ("mov", "a,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ emitcode ("jnb", "acc.7,%05d$", lbl->key+100);
+ // right side is negative, 8-bit two's complement
+ emitcode ("cpl", "F0"); // complement sign flag
+ emitcode ("cpl", "a");
+ emitcode ("inc", "a");
+ emitcode ("", "%05d$:", lbl->key+100);
+ }
+ emitcode ("mul", "ab");
+
+ lbl=newiTempLabel(NULL);
+ emitcode ("jnb", "F0,%05d$", lbl->key+100);
+ // only ONE op was negative, we have to do a 8/16-bit two's complement
+ emitcode ("cpl", "a"); // lsb
+ if (size==1) {
+ emitcode ("inc", "a");
+ } else {
+ emitcode ("add", "a,#1");
+ emitcode ("xch", "a,b");
+ emitcode ("cpl", "a"); // msb
+ emitcode ("addc", "a,#0");
+ emitcode ("xch", "a,b");
+ }
+
+ emitcode ("", "%05d$:", lbl->key+100);
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ if (size==2) {
+ aopPut (AOP (result), "b", 1, isOperandVolatile (result, FALSE));
+ }
}
/*-----------------------------------------------------------------*/
-/* jmpIfTrue - */
+/* genMult - generates code for multiplication */
/*-----------------------------------------------------------------*/
-static void jumpIfTrue (iCode *ic)
+static void
+genMult (iCode * ic)
{
- if(!IC_TRUE(ic))
- emitcode("ljmp","%05d$",IC_FALSE(ic)->key+100);
- ic->generated = 1;
+ operand *left = IC_LEFT (ic);
+ operand *right = IC_RIGHT (ic);
+ operand *result = IC_RESULT (ic);
+
+ D(emitcode ("; genMult",""));
+
+ /* assign the amsops */
+ aopOp (left, ic, FALSE);
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, TRUE);
+
+ /* special cases first */
+ /* both are bits */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ AOP_TYPE (right) == AOP_CRY)
+ {
+ genMultbits (left, right, result);
+ goto release;
+ }
+
+ /* if both are of size == 1 */
+#if 0 // one of them can be a sloc shared with the result
+ if (AOP_SIZE (left) == 1 && AOP_SIZE (right) == 1)
+#else
+ if (getSize(operandType(left)) == 1 &&
+ getSize(operandType(right)) == 1)
+#endif
+ {
+ genMultOneByte (left, right, result);
+ goto release;
+ }
+
+ /* should have been converted to function call */
+ fprintf (stderr, "left: %d right: %d\n", getSize(OP_SYMBOL(left)->type),
+ getSize(OP_SYMBOL(right)->type));
+ assert (0);
+
+release:
+ freeAsmop (result, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
}
/*-----------------------------------------------------------------*/
-/* jmpTrueOrFalse - */
+/* genDivbits :- division of bits */
/*-----------------------------------------------------------------*/
-static void jmpTrueOrFalse (iCode *ic, symbol *tlbl)
+static void
+genDivbits (operand * left,
+ operand * right,
+ operand * result)
{
- // ugly but optimized by peephole
- if(IC_TRUE(ic)){
- symbol *nlbl = newiTempLabel(NULL);
- emitcode("sjmp","%05d$",nlbl->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- emitcode("ljmp","%05d$",IC_TRUE(ic)->key+100);
- emitcode("","%05d$:",nlbl->key+100);
- }
- else{
- emitcode("ljmp","%05d$",IC_FALSE(ic)->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- }
- ic->generated = 1;
+
+ char *l;
+
+ D(emitcode ("; genDivbits",""));
+
+ /* the result must be bit */
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+
+ MOVA (l);
+
+ emitcode ("div", "ab");
+ emitcode ("rrc", "a");
+ aopPut (AOP (result), "c", 0, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
-/* genAnd - code for and */
+/* genDivOneByte : 8 bit division */
/*-----------------------------------------------------------------*/
-static void genAnd (iCode *ic, iCode *ifx)
+static void
+genDivOneByte (operand * left,
+ operand * right,
+ operand * result)
{
- operand *left, *right, *result;
- int size, offset=0;
- unsigned long lit = 0L;
- int bytelit = 0;
- char buffer[10];
-
- aopOp((left = IC_LEFT(ic)),ic,FALSE);
- aopOp((right= IC_RIGHT(ic)),ic,FALSE);
- aopOp((result=IC_RESULT(ic)),ic,TRUE);
+ sym_link *opetype = operandType (result);
+ char *l;
+ symbol *lbl;
+ int size, offset;
-#ifdef DEBUG_TYPE
- emitcode("","; Type res[%d] = l[%d]&r[%d]",
- AOP_TYPE(result),
- AOP_TYPE(left), AOP_TYPE(right));
- emitcode("","; Size res[%d] = l[%d]&r[%d]",
- AOP_SIZE(result),
- AOP_SIZE(left), AOP_SIZE(right));
-#endif
+ D(emitcode ("; genDivOneByte",""));
- /* if left is a literal & right is not then exchange them */
- if ((AOP_TYPE(left) == AOP_LIT && AOP_TYPE(right) != AOP_LIT) ||
- AOP_NEEDSACC(left)) {
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
-
- /* if result = right then exchange them */
- if(sameRegs(AOP(result),AOP(right))){
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
-
- /* if right is bit then exchange them */
- if (AOP_TYPE(right) == AOP_CRY &&
- AOP_TYPE(left) != AOP_CRY){
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
- if(AOP_TYPE(right) == AOP_LIT)
- lit = (unsigned long)floatFromVal (AOP(right)->aopu.aop_lit);
-
- size = AOP_SIZE(result);
-
- // if(bit & yy)
- // result = bit & yy;
- if (AOP_TYPE(left) == AOP_CRY){
- // c = bit & literal;
- if(AOP_TYPE(right) == AOP_LIT){
- if(lit & 1) {
- if(size && sameRegs(AOP(result),AOP(left)))
- // no change
- goto release;
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- } else {
- // bit(result) = 0;
- if(size && (AOP_TYPE(result) == AOP_CRY)){
- emitcode("clr","%s",AOP(result)->aopu.aop_dir);
- goto release;
- }
- if((AOP_TYPE(result) == AOP_CRY) && ifx){
- jumpIfTrue(ifx);
- goto release;
- }
- emitcode("clr","c");
- }
- } else {
- if (AOP_TYPE(right) == AOP_CRY){
- // c = bit & bit;
- emitcode("mov","c,%s",AOP(right)->aopu.aop_dir);
- emitcode("anl","c,%s",AOP(left)->aopu.aop_dir);
- } else {
- // c = bit & val;
- MOVA(aopGet(AOP(right),0,FALSE,FALSE));
- // c = lsb
- emitcode("rrc","a");
- emitcode("anl","c,%s",AOP(left)->aopu.aop_dir);
- }
- }
- // bit = c
- // val = c
- if(size)
- outBitC(result);
- // if(bit & ...)
- else if((AOP_TYPE(result) == AOP_CRY) && ifx)
- genIfxJump(ifx, "c");
- goto release ;
- }
-
- // if(val & 0xZZ) - size = 0, ifx != FALSE -
- // bit = val & 0xZZ - size = 1, ifx = FALSE -
- if((AOP_TYPE(right) == AOP_LIT) &&
- (AOP_TYPE(result) == AOP_CRY) &&
- (AOP_TYPE(left) != AOP_CRY)){
- int posbit = isLiteralBit(lit);
- /* left & 2^n */
- if(posbit){
- posbit--;
- MOVA(aopGet(AOP(left),posbit>>3,FALSE,FALSE));
- // bit = left & 2^n
- if(size)
- emitcode("mov","c,acc.%d",posbit&0x07);
- // if(left & 2^n)
- else{
- if(ifx){
- sprintf(buffer,"acc.%d",posbit&0x07);
- genIfxJump(ifx, buffer);
- }
- goto release;
- }
- } else {
- symbol *tlbl = newiTempLabel(NULL);
- int sizel = AOP_SIZE(left);
- if(size)
- emitcode("setb","c");
- while(sizel--){
- if((bytelit = ((lit >> (offset*8)) & 0x0FFL)) != 0x0L){
- MOVA( aopGet(AOP(left),offset,FALSE,FALSE));
- // byte == 2^n ?
- if((posbit = isLiteralBit(bytelit)) != 0)
- emitcode("jb","acc.%d,%05d$",(posbit-1)&0x07,tlbl->key+100);
- else{
- if(bytelit != 0x0FFL)
- emitcode("anl","a,%s",
- aopGet(AOP(right),offset,FALSE,TRUE));
- emitcode("jnz","%05d$",tlbl->key+100);
- }
- }
- offset++;
- }
- // bit = left & literal
- if(size){
- emitcode("clr","c");
- emitcode("","%05d$:",tlbl->key+100);
- }
- // if(left & literal)
- else{
- if(ifx)
- jmpTrueOrFalse(ifx, tlbl);
- goto release ;
- }
- }
- outBitC(result);
- goto release ;
- }
-
- /* if left is same as result */
- if(sameRegs(AOP(result),AOP(left))){
- for(;size--; offset++) {
- if(AOP_TYPE(right) == AOP_LIT){
- if((bytelit = (int)((lit >> (offset*8)) & 0x0FFL)) == 0x0FF)
- continue;
- else
- if (bytelit == 0)
- aopPut(AOP(result),zero,offset);
- else
- if (IS_AOP_PREG(result)) {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("anl","a,%s",aopGet(AOP(left),offset,FALSE,TRUE));
- aopPut(AOP(result),"a",offset);
- } else
- emitcode("anl","%s,%s",
- aopGet(AOP(left),offset,FALSE,TRUE),
- aopGet(AOP(right),offset,FALSE,FALSE));
- } else {
- if (AOP_TYPE(left) == AOP_ACC)
- emitcode("anl","a,%s",aopGet(AOP(right),offset,FALSE,FALSE));
- else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- if (IS_AOP_PREG(result)) {
- emitcode("anl","a,%s",aopGet(AOP(left),offset,FALSE,TRUE));
- aopPut(AOP(result),"a",offset);
-
- } else
- emitcode("anl","%s,a",
- aopGet(AOP(left),offset,FALSE,TRUE));
- }
- }
- }
- } else {
- // left & result in different registers
- if(AOP_TYPE(result) == AOP_CRY){
- // result = bit
- // if(size), result in bit
- // if(!size && ifx), conditional oper: if(left & right)
- symbol *tlbl = newiTempLabel(NULL);
- int sizer = min(AOP_SIZE(left),AOP_SIZE(right));
- if(size)
- emitcode("setb","c");
- while(sizer--){
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("anl","a,%s",
- aopGet(AOP(left),offset,FALSE,FALSE));
- emitcode("jnz","%05d$",tlbl->key+100);
- offset++;
- }
- if(size){
- CLRC;
- emitcode("","%05d$:",tlbl->key+100);
- outBitC(result);
- } else if(ifx)
- jmpTrueOrFalse(ifx, tlbl);
- } else {
- for(;(size--);offset++) {
- // normal case
- // result = left & right
- if(AOP_TYPE(right) == AOP_LIT){
- if((bytelit = (int)((lit >> (offset*8)) & 0x0FFL)) == 0x0FF){
- aopPut(AOP(result),
- aopGet(AOP(left),offset,FALSE,FALSE),
- offset);
- continue;
- } else if(bytelit == 0){
- aopPut(AOP(result),zero,offset);
- continue;
- }
- }
- // faster than result <- left, anl result,right
- // and better if result is SFR
- if (AOP_TYPE(left) == AOP_ACC)
- emitcode("anl","a,%s",aopGet(AOP(right),offset,FALSE,FALSE));
- else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("anl","a,%s",
- aopGet(AOP(left),offset,FALSE,FALSE));
- }
- aopPut(AOP(result),"a",offset);
- }
- }
+ size = AOP_SIZE (result) - 1;
+ offset = 1;
+ /* signed or unsigned */
+ if (SPEC_USIGN (opetype))
+ {
+ /* unsigned is easy */
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("div", "ab");
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ while (size--)
+ aopPut (AOP (result), zero, offset++, isOperandVolatile (result, FALSE));
+ return;
+ }
+
+ /* signed is a little bit more difficult */
+
+ /* save the signs of the operands */
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("xrl", "a,%s", aopGet (AOP (right), 0, FALSE, TRUE));
+ emitcode ("push", "acc"); /* save it on the stack */
+
+ /* now sign adjust for both left & right */
+ l = aopGet (AOP (right), 0, FALSE, FALSE);
+ MOVA (l);
+ lbl = newiTempLabel (NULL);
+ emitcode ("jnb", "acc.7,%05d$", (lbl->key + 100));
+ emitcode ("cpl", "a");
+ emitcode ("inc", "a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ emitcode ("mov", "b,a");
+
+ /* sign adjust left side */
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+
+ lbl = newiTempLabel (NULL);
+ emitcode ("jnb", "acc.7,%05d$", (lbl->key + 100));
+ emitcode ("cpl", "a");
+ emitcode ("inc", "a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+
+ /* now the division */
+ emitcode ("div", "ab");
+ /* we are interested in the lower order
+ only */
+ emitcode ("mov", "b,a");
+ lbl = newiTempLabel (NULL);
+ emitcode ("pop", "acc");
+ /* if there was an over flow we don't
+ adjust the sign of the result */
+ emitcode ("jb", "ov,%05d$", (lbl->key + 100));
+ emitcode ("jnb", "acc.7,%05d$", (lbl->key + 100));
+ CLRC;
+ emitcode ("clr", "a");
+ emitcode ("subb", "a,b");
+ emitcode ("mov", "b,a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+
+ /* now we are done */
+ aopPut (AOP (result), "b", 0, isOperandVolatile (result, FALSE));
+ if (size > 0)
+ {
+ emitcode ("mov", "c,b.7");
+ emitcode ("subb", "a,acc");
}
+ while (size--)
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
}
/*-----------------------------------------------------------------*/
-/* genOr - code for or */
+/* genDiv - generates code for division */
/*-----------------------------------------------------------------*/
-static void genOr (iCode *ic, iCode *ifx)
+static void
+genDiv (iCode * ic)
{
- operand *left, *right, *result;
- int size, offset=0;
- unsigned long lit = 0L;
+ operand *left = IC_LEFT (ic);
+ operand *right = IC_RIGHT (ic);
+ operand *result = IC_RESULT (ic);
- aopOp((left = IC_LEFT(ic)),ic,FALSE);
- aopOp((right= IC_RIGHT(ic)),ic,FALSE);
- aopOp((result=IC_RESULT(ic)),ic,TRUE);
+ D(emitcode ("; genDiv",""));
-#ifdef DEBUG_TYPE
- emitcode("","; Type res[%d] = l[%d]&r[%d]",
- AOP_TYPE(result),
- AOP_TYPE(left), AOP_TYPE(right));
- emitcode("","; Size res[%d] = l[%d]&r[%d]",
- AOP_SIZE(result),
- AOP_SIZE(left), AOP_SIZE(right));
-#endif
+ /* assign the amsops */
+ aopOp (left, ic, FALSE);
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, TRUE);
- /* if left is a literal & right is not then exchange them */
- if ((AOP_TYPE(left) == AOP_LIT && AOP_TYPE(right) != AOP_LIT) ||
- AOP_NEEDSACC(left)) {
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
-
- /* if result = right then exchange them */
- if(sameRegs(AOP(result),AOP(right))){
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
-
- /* if right is bit then exchange them */
- if (AOP_TYPE(right) == AOP_CRY &&
- AOP_TYPE(left) != AOP_CRY){
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
- if(AOP_TYPE(right) == AOP_LIT)
- lit = (unsigned long)floatFromVal (AOP(right)->aopu.aop_lit);
-
- size = AOP_SIZE(result);
-
- // if(bit | yy)
- // xx = bit | yy;
- if (AOP_TYPE(left) == AOP_CRY){
- if(AOP_TYPE(right) == AOP_LIT){
- // c = bit & literal;
- if(lit){
- // lit != 0 => result = 1
- if(AOP_TYPE(result) == AOP_CRY){
- if(size)
- emitcode("setb","%s",AOP(result)->aopu.aop_dir);
- else if(ifx)
- continueIfTrue(ifx);
- goto release;
- }
- emitcode("setb","c");
- } else {
- // lit == 0 => result = left
- if(size && sameRegs(AOP(result),AOP(left)))
- goto release;
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- }
- } else {
- if (AOP_TYPE(right) == AOP_CRY){
- // c = bit | bit;
- emitcode("mov","c,%s",AOP(right)->aopu.aop_dir);
- emitcode("orl","c,%s",AOP(left)->aopu.aop_dir);
- }
- else{
- // c = bit | val;
- symbol *tlbl = newiTempLabel(NULL);
- if(!((AOP_TYPE(result) == AOP_CRY) && ifx))
- emitcode("setb","c");
- emitcode("jb","%s,%05d$",
- AOP(left)->aopu.aop_dir,tlbl->key+100);
- toBoolean(right);
- emitcode("jnz","%05d$",tlbl->key+100);
- if((AOP_TYPE(result) == AOP_CRY) && ifx){
- jmpTrueOrFalse(ifx, tlbl);
- goto release;
- } else {
- CLRC;
- emitcode("","%05d$:",tlbl->key+100);
- }
- }
- }
- // bit = c
- // val = c
- if(size)
- outBitC(result);
- // if(bit | ...)
- else if((AOP_TYPE(result) == AOP_CRY) && ifx)
- genIfxJump(ifx, "c");
- goto release ;
- }
-
- // if(val | 0xZZ) - size = 0, ifx != FALSE -
- // bit = val | 0xZZ - size = 1, ifx = FALSE -
- if((AOP_TYPE(right) == AOP_LIT) &&
- (AOP_TYPE(result) == AOP_CRY) &&
- (AOP_TYPE(left) != AOP_CRY)){
- if(lit){
- // result = 1
- if(size)
- emitcode("setb","%s",AOP(result)->aopu.aop_dir);
- else
- continueIfTrue(ifx);
- goto release;
- } else {
- // lit = 0, result = boolean(left)
- if(size)
- emitcode("setb","c");
- toBoolean(right);
- if(size){
- symbol *tlbl = newiTempLabel(NULL);
- emitcode("jnz","%05d$",tlbl->key+100);
- CLRC;
- emitcode("","%05d$:",tlbl->key+100);
- } else {
- genIfxJump (ifx,"a");
- goto release;
- }
- }
- outBitC(result);
- goto release ;
- }
-
- /* if left is same as result */
- if(sameRegs(AOP(result),AOP(left))){
- for(;size--; offset++) {
- if(AOP_TYPE(right) == AOP_LIT){
- if(((lit >> (offset*8)) & 0x0FFL) == 0x00L)
- continue;
- else
- if (IS_AOP_PREG(left)) {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("orl","a,%s",aopGet(AOP(left),offset,FALSE,TRUE));
- aopPut(AOP(result),"a",offset);
- } else
- emitcode("orl","%s,%s",
- aopGet(AOP(left),offset,FALSE,TRUE),
- aopGet(AOP(right),offset,FALSE,FALSE));
- } else {
- if (AOP_TYPE(left) == AOP_ACC)
- emitcode("orl","a,%s",aopGet(AOP(right),offset,FALSE,FALSE));
- else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- if (IS_AOP_PREG(left)) {
- emitcode("orl","a,%s",aopGet(AOP(left),offset,FALSE,TRUE));
- aopPut(AOP(result),"a",offset);
- } else
- emitcode("orl","%s,a",
- aopGet(AOP(left),offset,FALSE,TRUE));
- }
- }
- }
- } else {
- // left & result in different registers
- if(AOP_TYPE(result) == AOP_CRY){
- // result = bit
- // if(size), result in bit
- // if(!size && ifx), conditional oper: if(left | right)
- symbol *tlbl = newiTempLabel(NULL);
- int sizer = max(AOP_SIZE(left),AOP_SIZE(right));
- if(size)
- emitcode("setb","c");
- while(sizer--){
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("orl","a,%s",
- aopGet(AOP(left),offset,FALSE,FALSE));
- emitcode("jnz","%05d$",tlbl->key+100);
- offset++;
- }
- if(size){
- CLRC;
- emitcode("","%05d$:",tlbl->key+100);
- outBitC(result);
- } else if(ifx)
- jmpTrueOrFalse(ifx, tlbl);
- } else for(;(size--);offset++){
- // normal case
- // result = left & right
- if(AOP_TYPE(right) == AOP_LIT){
- if(((lit >> (offset*8)) & 0x0FFL) == 0x00L){
- aopPut(AOP(result),
- aopGet(AOP(left),offset,FALSE,FALSE),
- offset);
- continue;
- }
- }
- // faster than result <- left, anl result,right
- // and better if result is SFR
- if (AOP_TYPE(left) == AOP_ACC)
- emitcode("orl","a,%s",aopGet(AOP(right),offset,FALSE,FALSE));
- else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("orl","a,%s",
- aopGet(AOP(left),offset,FALSE,FALSE));
- }
- aopPut(AOP(result),"a",offset);
- }
+ /* special cases first */
+ /* both are bits */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ AOP_TYPE (right) == AOP_CRY)
+ {
+ genDivbits (left, right, result);
+ goto release;
}
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ /* if both are of size == 1 */
+ if (AOP_SIZE (left) == 1 &&
+ AOP_SIZE (right) == 1)
+ {
+ genDivOneByte (left, right, result);
+ goto release;
+ }
+
+ /* should have been converted to function call */
+ assert (0);
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genXor - code for xclusive or */
+/* genModbits :- modulus of bits */
/*-----------------------------------------------------------------*/
-static void genXor (iCode *ic, iCode *ifx)
+static void
+genModbits (operand * left,
+ operand * right,
+ operand * result)
{
- operand *left, *right, *result;
- int size, offset=0;
- unsigned long lit = 0L;
- aopOp((left = IC_LEFT(ic)),ic,FALSE);
- aopOp((right= IC_RIGHT(ic)),ic,FALSE);
- aopOp((result=IC_RESULT(ic)),ic,TRUE);
+ char *l;
-#ifdef DEBUG_TYPE
- emitcode("","; Type res[%d] = l[%d]&r[%d]",
- AOP_TYPE(result),
- AOP_TYPE(left), AOP_TYPE(right));
- emitcode("","; Size res[%d] = l[%d]&r[%d]",
- AOP_SIZE(result),
- AOP_SIZE(left), AOP_SIZE(right));
-#endif
+ D(emitcode ("; genModbits",""));
- /* if left is a literal & right is not ||
- if left needs acc & right does not */
- if ((AOP_TYPE(left) == AOP_LIT && AOP_TYPE(right) != AOP_LIT) ||
- (AOP_NEEDSACC(left) && !AOP_NEEDSACC(right))) {
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
-
- /* if result = right then exchange them */
- if(sameRegs(AOP(result),AOP(right))){
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
-
- /* if right is bit then exchange them */
- if (AOP_TYPE(right) == AOP_CRY &&
- AOP_TYPE(left) != AOP_CRY){
- operand *tmp = right ;
- right = left;
- left = tmp;
- }
- if(AOP_TYPE(right) == AOP_LIT)
- lit = (unsigned long)floatFromVal (AOP(right)->aopu.aop_lit);
-
- size = AOP_SIZE(result);
-
- // if(bit ^ yy)
- // xx = bit ^ yy;
- if (AOP_TYPE(left) == AOP_CRY){
- if(AOP_TYPE(right) == AOP_LIT){
- // c = bit & literal;
- if(lit>>1){
- // lit>>1 != 0 => result = 1
- if(AOP_TYPE(result) == AOP_CRY){
- if(size)
- emitcode("setb","%s",AOP(result)->aopu.aop_dir);
- else if(ifx)
- continueIfTrue(ifx);
- goto release;
- }
- emitcode("setb","c");
- } else{
- // lit == (0 or 1)
- if(lit == 0){
- // lit == 0, result = left
- if(size && sameRegs(AOP(result),AOP(left)))
- goto release;
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- } else{
- // lit == 1, result = not(left)
- if(size && sameRegs(AOP(result),AOP(left))){
- emitcode("cpl","%s",AOP(result)->aopu.aop_dir);
- goto release;
- } else {
- emitcode("mov","c,%s",AOP(left)->aopu.aop_dir);
- emitcode("cpl","c");
- }
- }
- }
+ /* the result must be bit */
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
- } else {
- // right != literal
- symbol *tlbl = newiTempLabel(NULL);
- if (AOP_TYPE(right) == AOP_CRY){
- // c = bit ^ bit;
- emitcode("mov","c,%s",AOP(right)->aopu.aop_dir);
- }
- else{
- int sizer = AOP_SIZE(right);
- // c = bit ^ val
- // if val>>1 != 0, result = 1
- emitcode("setb","c");
- while(sizer){
- MOVA(aopGet(AOP(right),sizer-1,FALSE,FALSE));
- if(sizer == 1)
- // test the msb of the lsb
- emitcode("anl","a,#0xfe");
- emitcode("jnz","%05d$",tlbl->key+100);
- sizer--;
- }
- // val = (0,1)
- emitcode("rrc","a");
- }
- emitcode("jnb","%s,%05d$",AOP(left)->aopu.aop_dir,(tlbl->key+100));
- emitcode("cpl","c");
- emitcode("","%05d$:",(tlbl->key+100));
- }
- // bit = c
- // val = c
- if(size)
- outBitC(result);
- // if(bit | ...)
- else if((AOP_TYPE(result) == AOP_CRY) && ifx)
- genIfxJump(ifx, "c");
- goto release ;
- }
-
- if(sameRegs(AOP(result),AOP(left))){
- /* if left is same as result */
- for(;size--; offset++) {
- if(AOP_TYPE(right) == AOP_LIT){
- if(((lit >> (offset*8)) & 0x0FFL) == 0x00L)
- continue;
- else
- if (IS_AOP_PREG(left)) {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("xrl","a,%s",aopGet(AOP(left),offset,FALSE,TRUE));
- aopPut(AOP(result),"a",offset);
- } else
- emitcode("xrl","%s,%s",
- aopGet(AOP(left),offset,FALSE,TRUE),
- aopGet(AOP(right),offset,FALSE,FALSE));
- } else {
- if (AOP_TYPE(left) == AOP_ACC)
- emitcode("xrl","a,%s",aopGet(AOP(right),offset,FALSE,FALSE));
- else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- if (IS_AOP_PREG(left)) {
- emitcode("xrl","a,%s",aopGet(AOP(left),offset,FALSE,TRUE));
- aopPut(AOP(result),"a",offset);
- } else
- emitcode("xrl","%s,a",
- aopGet(AOP(left),offset,FALSE,TRUE));
- }
- }
- }
- } else {
- // left & result in different registers
- if(AOP_TYPE(result) == AOP_CRY){
- // result = bit
- // if(size), result in bit
- // if(!size && ifx), conditional oper: if(left ^ right)
- symbol *tlbl = newiTempLabel(NULL);
- int sizer = max(AOP_SIZE(left),AOP_SIZE(right));
- if(size)
- emitcode("setb","c");
- while(sizer--){
- if((AOP_TYPE(right) == AOP_LIT) &&
- (((lit >> (offset*8)) & 0x0FFL) == 0x00L)){
- MOVA(aopGet(AOP(left),offset,FALSE,FALSE));
- } else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("xrl","a,%s",
- aopGet(AOP(left),offset,FALSE,FALSE));
- }
- emitcode("jnz","%05d$",tlbl->key+100);
- offset++;
- }
- if(size){
- CLRC;
- emitcode("","%05d$:",tlbl->key+100);
- outBitC(result);
- } else if(ifx)
- jmpTrueOrFalse(ifx, tlbl);
- } else for(;(size--);offset++){
- // normal case
- // result = left & right
- if(AOP_TYPE(right) == AOP_LIT){
- if(((lit >> (offset*8)) & 0x0FFL) == 0x00L){
- aopPut(AOP(result),
- aopGet(AOP(left),offset,FALSE,FALSE),
- offset);
- continue;
- }
- }
- // faster than result <- left, anl result,right
- // and better if result is SFR
- if (AOP_TYPE(left) == AOP_ACC)
- emitcode("xrl","a,%s",aopGet(AOP(right),offset,FALSE,FALSE));
- else {
- MOVA(aopGet(AOP(right),offset,FALSE,FALSE));
- emitcode("xrl","a,%s",
- aopGet(AOP(left),offset,FALSE,TRUE));
- }
- aopPut(AOP(result),"a",offset);
- }
- }
+ MOVA (l);
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ emitcode ("div", "ab");
+ emitcode ("mov", "a,b");
+ emitcode ("rrc", "a");
+ aopPut (AOP (result), "c", 0, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
-/* genInline - write the inline code out */
+/* genModOneByte : 8 bit modulus */
/*-----------------------------------------------------------------*/
-static void genInline (iCode *ic)
+static void
+genModOneByte (operand * left,
+ operand * right,
+ operand * result)
{
- char buffer[MAX_INLINEASM];
- char *bp = buffer;
- char *bp1= buffer;
-
- _G.inLine += (!options.asmpeep);
- strcpy(buffer,IC_INLINE(ic));
-
- /* emit each line as a code */
- while (*bp) {
- if (*bp == '\n') {
- *bp++ = '\0';
- emitcode(bp1,"");
- bp1 = bp;
- } else {
- if (*bp == ':') {
- bp++;
- *bp = '\0';
- bp++;
- emitcode(bp1,"");
- bp1 = bp;
- } else
- bp++;
- }
- }
- if (bp1 != bp)
- emitcode(bp1,"");
- /* emitcode("",buffer); */
- _G.inLine -= (!options.asmpeep);
+ sym_link *opetype = operandType (result);
+ char *l;
+ symbol *lbl;
+
+ D(emitcode ("; genModOneByte",""));
+
+ /* signed or unsigned */
+ if (SPEC_USIGN (opetype))
+ {
+ /* unsigned is easy */
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("div", "ab");
+ aopPut (AOP (result), "b", 0, isOperandVolatile (result, FALSE));
+ return;
+ }
+
+ /* signed is a little bit more difficult */
+
+ /* save the signs of the operands */
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+
+ emitcode ("xrl", "a,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ emitcode ("push", "acc"); /* save it on the stack */
+
+ /* now sign adjust for both left & right */
+ l = aopGet (AOP (right), 0, FALSE, FALSE);
+ MOVA (l);
+
+ lbl = newiTempLabel (NULL);
+ emitcode ("jnb", "acc.7,%05d$", (lbl->key + 100));
+ emitcode ("cpl", "a");
+ emitcode ("inc", "a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ emitcode ("mov", "b,a");
+
+ /* sign adjust left side */
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+
+ lbl = newiTempLabel (NULL);
+ emitcode ("jnb", "acc.7,%05d$", (lbl->key + 100));
+ emitcode ("cpl", "a");
+ emitcode ("inc", "a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+
+ /* now the multiplication */
+ emitcode ("div", "ab");
+ /* we are interested in the lower order
+ only */
+ lbl = newiTempLabel (NULL);
+ emitcode ("pop", "acc");
+ /* if there was an over flow we don't
+ adjust the sign of the result */
+ emitcode ("jb", "ov,%05d$", (lbl->key + 100));
+ emitcode ("jnb", "acc.7,%05d$", (lbl->key + 100));
+ CLRC;
+ emitcode ("clr", "a");
+ emitcode ("subb", "a,b");
+ emitcode ("mov", "b,a");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+
+ /* now we are done */
+ aopPut (AOP (result), "b", 0, isOperandVolatile (result, FALSE));
+
}
/*-----------------------------------------------------------------*/
-/* genRRC - rotate right with carry */
+/* genMod - generates code for division */
/*-----------------------------------------------------------------*/
-static void genRRC (iCode *ic)
+static void
+genMod (iCode * ic)
{
- operand *left , *result ;
- int size, offset = 0;
- char *l;
+ operand *left = IC_LEFT (ic);
+ operand *right = IC_RIGHT (ic);
+ operand *result = IC_RESULT (ic);
+
+ D(emitcode ("; genMod",""));
- /* rotate right with carry */
- left = IC_LEFT(ic);
- result=IC_RESULT(ic);
- aopOp (left,ic,FALSE);
- aopOp (result,ic,FALSE);
+ /* assign the amsops */
+ aopOp (left, ic, FALSE);
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, TRUE);
- /* move it to the result */
- size = AOP_SIZE(result);
- offset = size - 1 ;
- CLRC;
- while (size--) {
- l = aopGet(AOP(left),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("rrc","a");
- if (AOP_SIZE(result) > 1)
- aopPut(AOP(result),"a",offset--);
+ /* special cases first */
+ /* both are bits */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ AOP_TYPE (right) == AOP_CRY)
+ {
+ genModbits (left, right, result);
+ goto release;
}
- /* now we need to put the carry into the
- highest order byte of the result */
- if (AOP_SIZE(result) > 1) {
- l = aopGet(AOP(result),AOP_SIZE(result)-1,FALSE,FALSE);
- MOVA(l);
+
+ /* if both are of size == 1 */
+ if (AOP_SIZE (left) == 1 &&
+ AOP_SIZE (right) == 1)
+ {
+ genModOneByte (left, right, result);
+ goto release;
}
- emitcode("mov","acc.7,c");
- aopPut(AOP(result),"a",AOP_SIZE(result)-1);
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+
+ /* should have been converted to function call */
+ assert (0);
+
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genRLC - generate code for rotate left with carry */
+/* genIfxJump :- will create a jump depending on the ifx */
/*-----------------------------------------------------------------*/
-static void genRLC (iCode *ic)
-{
- operand *left , *result ;
- int size, offset = 0;
- char *l;
-
- /* rotate right with carry */
- left = IC_LEFT(ic);
- result=IC_RESULT(ic);
- aopOp (left,ic,FALSE);
- aopOp (result,ic,FALSE);
-
- /* move it to the result */
- size = AOP_SIZE(result);
- offset = 0 ;
- if (size--) {
- l = aopGet(AOP(left),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("add","a,acc");
- if (AOP_SIZE(result) > 1)
- aopPut(AOP(result),"a",offset++);
- while (size--) {
- l = aopGet(AOP(left),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("rlc","a");
- if (AOP_SIZE(result) > 1)
- aopPut(AOP(result),"a",offset++);
- }
+static void
+genIfxJump (iCode * ic, char *jval)
+{
+ symbol *jlbl;
+ symbol *tlbl = newiTempLabel (NULL);
+ char *inst;
+
+ D(emitcode ("; genIfxJump",""));
+
+ /* if true label then we jump if condition
+ supplied is true */
+ if (IC_TRUE (ic))
+ {
+ jlbl = IC_TRUE (ic);
+ inst = ((strcmp (jval, "a") == 0 ? "jz" :
+ (strcmp (jval, "c") == 0 ? "jnc" : "jnb")));
}
- /* now we need to put the carry into the
- highest order byte of the result */
- if (AOP_SIZE(result) > 1) {
- l = aopGet(AOP(result),0,FALSE,FALSE);
- MOVA(l);
+ else
+ {
+ /* false label is present */
+ jlbl = IC_FALSE (ic);
+ inst = ((strcmp (jval, "a") == 0 ? "jnz" :
+ (strcmp (jval, "c") == 0 ? "jc" : "jb")));
}
- emitcode("mov","acc.0,c");
- aopPut(AOP(result),"a",0);
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ if (strcmp (inst, "jb") == 0 || strcmp (inst, "jnb") == 0)
+ emitcode (inst, "%s,%05d$", jval, (tlbl->key + 100));
+ else
+ emitcode (inst, "%05d$", tlbl->key + 100);
+ emitcode ("ljmp", "%05d$", jlbl->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+
+ /* mark the icode as generated */
+ ic->generated = 1;
}
/*-----------------------------------------------------------------*/
-/* genGetHbit - generates code get highest order bit */
+/* genCmp :- greater or less than comparison */
/*-----------------------------------------------------------------*/
-static void genGetHbit (iCode *ic)
+static void
+genCmp (operand * left, operand * right,
+ operand * result, iCode * ifx, int sign, iCode *ic)
{
- operand *left, *result;
- left = IC_LEFT(ic);
- result=IC_RESULT(ic);
- aopOp (left,ic,FALSE);
- aopOp (result,ic,FALSE);
+ int size, offset = 0;
+ unsigned long lit = 0L;
+ bool rightInB;
+
+ D(emitcode ("; genCmp",""));
- /* get the highest order byte into a */
- MOVA(aopGet(AOP(left),AOP_SIZE(left) - 1,FALSE,FALSE));
- if(AOP_TYPE(result) == AOP_CRY){
- emitcode("rlc","a");
- outBitC(result);
+ /* if left & right are bit variables */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ AOP_TYPE (right) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", AOP (right)->aopu.aop_dir);
+ emitcode ("anl", "c,%s", AOP (left)->aopu.aop_dir);
}
- else{
- emitcode("rl","a");
- emitcode("anl","a,#0x01");
- outAcc(result);
+ else
+ {
+ /* subtract right from left if at the
+ end the carry flag is set then we know that
+ left is greater than right */
+ size = max (AOP_SIZE (left), AOP_SIZE (right));
+
+ /* if unsigned char cmp with lit, do cjne left,#right,zz */
+ if ((size == 1) && !sign &&
+ (AOP_TYPE (right) == AOP_LIT && AOP_TYPE (left) != AOP_DIR))
+ {
+ symbol *lbl = newiTempLabel (NULL);
+ emitcode ("cjne", "%s,%s,%05d$",
+ aopGet (AOP (left), offset, FALSE, FALSE),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ lbl->key + 100);
+ emitcode ("", "%05d$:", lbl->key + 100);
+ }
+ else
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit);
+ /* optimize if(x < 0) or if(x >= 0) */
+ if (lit == 0L)
+ {
+ if (!sign)
+ {
+ CLRC;
+ }
+ else
+ {
+ MOVA (aopGet (AOP (left), AOP_SIZE (left) - 1, FALSE, FALSE));
+ if (!(AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result)) && ifx)
+ {
+ genIfxJump (ifx, "acc.7");
+ return;
+ }
+ else
+ emitcode ("rlc", "a");
+ }
+ goto release;
+ }
+ }
+ CLRC;
+ while (size--)
+ {
+ rightInB = aopGetUsesAcc(AOP (right), offset);
+ if (rightInB)
+ emitcode ("mov", "b,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ MOVA (aopGet (AOP (left), offset, FALSE, FALSE));
+ if (sign && size == 0)
+ {
+ emitcode ("xrl", "a,#0x80");
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ unsigned long lit = (unsigned long)
+ floatFromVal (AOP (right)->aopu.aop_lit);
+ emitcode ("subb", "a,#0x%02x",
+ 0x80 ^ (unsigned int) ((lit >> (offset * 8)) & 0x0FFL));
+ }
+ else
+ {
+ if (!rightInB)
+ emitcode ("mov", "b,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("xrl", "b,#0x80");
+ emitcode ("subb", "a,b");
+ }
+ }
+ else
+ {
+ if (rightInB)
+ emitcode ("subb", "a,b");
+ else
+ emitcode ("subb", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ }
+ offset++;
+ }
+ }
}
-
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ if (AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result))
+ {
+ outBitC (result);
+ }
+ else
+ {
+ /* if the result is used in the next
+ ifx conditional branch then generate
+ code a little differently */
+ if (ifx)
+ genIfxJump (ifx, "c");
+ else
+ outBitC (result);
+ /* leave the result in acc */
+ }
}
/*-----------------------------------------------------------------*/
-/* AccRol - rotate left accumulator by known count */
+/* genCmpGt :- greater than comparison */
/*-----------------------------------------------------------------*/
-static void AccRol (int shCount)
-{
- shCount &= 0x0007; // shCount : 0..7
- switch(shCount){
- case 0 :
- break;
- case 1 :
- emitcode("rl","a");
- break;
- case 2 :
- emitcode("rl","a");
- emitcode("rl","a");
- break;
- case 3 :
- emitcode("swap","a");
- emitcode("rr","a");
- break;
- case 4 :
- emitcode("swap","a");
- break;
- case 5 :
- emitcode("swap","a");
- emitcode("rl","a");
- break;
- case 6 :
- emitcode("rr","a");
- emitcode("rr","a");
- break;
- case 7 :
- emitcode("rr","a");
- break;
- }
+static void
+genCmpGt (iCode * ic, iCode * ifx)
+{
+ operand *left, *right, *result;
+ sym_link *letype, *retype;
+ int sign;
+
+ D(emitcode ("; genCmpGt",""));
+
+ left = IC_LEFT (ic);
+ right = IC_RIGHT (ic);
+ result = IC_RESULT (ic);
+
+ letype = getSpec (operandType (left));
+ retype = getSpec (operandType (right));
+ sign = !(SPEC_USIGN (letype) | SPEC_USIGN (retype));
+ /* assign the amsops */
+ aopOp (left, ic, FALSE);
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, TRUE);
+
+ genCmp (right, left, result, ifx, sign,ic);
+
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* AccLsh - left shift accumulator by known count */
+/* genCmpLt - less than comparisons */
/*-----------------------------------------------------------------*/
-static void AccLsh (int shCount)
-{
- if(shCount != 0){
- if(shCount == 1)
- emitcode("add","a,acc");
- else
- if(shCount == 2) {
- emitcode("add","a,acc");
- emitcode("add","a,acc");
- } else {
- /* rotate left accumulator */
- AccRol(shCount);
- /* and kill the lower order bits */
- emitcode("anl","a,#0x%02x", SLMask[shCount]);
- }
- }
+static void
+genCmpLt (iCode * ic, iCode * ifx)
+{
+ operand *left, *right, *result;
+ sym_link *letype, *retype;
+ int sign;
+
+ D(emitcode ("; genCmpLt",""));
+
+ left = IC_LEFT (ic);
+ right = IC_RIGHT (ic);
+ result = IC_RESULT (ic);
+
+ letype = getSpec (operandType (left));
+ retype = getSpec (operandType (right));
+ sign = !(SPEC_USIGN (letype) | SPEC_USIGN (retype));
+
+ /* assign the amsops */
+ aopOp (left, ic, FALSE);
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, TRUE);
+
+ genCmp (left, right, result, ifx, sign,ic);
+
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* AccRsh - right shift accumulator by known count */
+/* gencjneshort - compare and jump if not equal */
/*-----------------------------------------------------------------*/
-static void AccRsh (int shCount)
-{
- if(shCount != 0){
- if(shCount == 1){
- CLRC;
- emitcode("rrc","a");
- } else {
- /* rotate right accumulator */
- AccRol(8 - shCount);
- /* and kill the higher order bits */
- emitcode("anl","a,#0x%02x", SRMask[shCount]);
- }
+static void
+gencjneshort (operand * left, operand * right, symbol * lbl)
+{
+ int size = max (AOP_SIZE (left), AOP_SIZE (right));
+ int offset = 0;
+ unsigned long lit = 0L;
+
+ /* if the left side is a literal or
+ if the right is in a pointer register and left
+ is not */
+ if ((AOP_TYPE (left) == AOP_LIT) ||
+ (AOP_TYPE (left) == AOP_IMMD) ||
+ (IS_AOP_PREG (right) && !IS_AOP_PREG (left)))
+ {
+ operand *t = right;
+ right = left;
+ left = t;
}
-}
+
+ if (AOP_TYPE (right) == AOP_LIT)
+ lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit);
-/*-----------------------------------------------------------------*/
-/* AccSRsh - signed right shift accumulator by known count */
-/*-----------------------------------------------------------------*/
-static void AccSRsh (int shCount)
-{
- symbol *tlbl ;
- if(shCount != 0){
- if(shCount == 1){
- emitcode("mov","c,acc.7");
- emitcode("rrc","a");
- } else if(shCount == 2){
- emitcode("mov","c,acc.7");
- emitcode("rrc","a");
- emitcode("mov","c,acc.7");
- emitcode("rrc","a");
- } else {
- tlbl = newiTempLabel(NULL);
- /* rotate right accumulator */
- AccRol(8 - shCount);
- /* and kill the higher order bits */
- emitcode("anl","a,#0x%02x", SRMask[shCount]);
- emitcode("jnb","acc.%d,%05d$",7-shCount,tlbl->key+100);
- emitcode("orl","a,#0x%02x",
- (unsigned char)~SRMask[shCount]);
- emitcode("","%05d$:",tlbl->key+100);
- }
+ /* if the right side is a literal then anything goes */
+ if (AOP_TYPE (right) == AOP_LIT &&
+ AOP_TYPE (left) != AOP_DIR &&
+ AOP_TYPE (left) != AOP_IMMD)
+ {
+ while (size--)
+ {
+ emitcode ("cjne", "%s,%s,%05d$",
+ aopGet (AOP (left), offset, FALSE, FALSE),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ lbl->key + 100);
+ offset++;
+ }
+ }
+
+ /* if the right side is in a register or in direct space or
+ if the left is a pointer register & right is not */
+ else if (AOP_TYPE (right) == AOP_REG ||
+ AOP_TYPE (right) == AOP_DIR ||
+ AOP_TYPE (right) == AOP_LIT ||
+ AOP_TYPE (right) == AOP_IMMD ||
+ (AOP_TYPE (left) == AOP_DIR && AOP_TYPE (right) == AOP_LIT) ||
+ (IS_AOP_PREG (left) && !IS_AOP_PREG (right)))
+ {
+ while (size--)
+ {
+ MOVA (aopGet (AOP (left), offset, FALSE, FALSE));
+ if ((AOP_TYPE (left) == AOP_DIR && AOP_TYPE (right) == AOP_LIT) &&
+ ((unsigned int) ((lit >> (offset * 8)) & 0x0FFL) == 0))
+ emitcode ("jnz", "%05d$", lbl->key + 100);
+ else
+ emitcode ("cjne", "a,%s,%05d$",
+ aopGet (AOP (right), offset, FALSE, TRUE),
+ lbl->key + 100);
+ offset++;
+ }
+ }
+ else
+ {
+ /* right is a pointer reg need both a & b */
+ while (size--)
+ {
+ char *l = aopGet (AOP (left), offset, FALSE, FALSE);
+ if (strcmp (l, "b"))
+ emitcode ("mov", "b,%s", l);
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("cjne", "a,b,%05d$", lbl->key + 100);
+ offset++;
+ }
}
}
/*-----------------------------------------------------------------*/
-/* shiftR1Left2Result - shift right one byte from left to result */
+/* gencjne - compare and jump if not equal */
/*-----------------------------------------------------------------*/
-static void shiftR1Left2Result (operand *left, int offl,
- operand *result, int offr,
- int shCount, int sign)
+static void
+gencjne (operand * left, operand * right, symbol * lbl)
{
- MOVA(aopGet(AOP(left),offl,FALSE,FALSE));
- /* shift right accumulator */
- if(sign)
- AccSRsh(shCount);
- else
- AccRsh(shCount);
- aopPut(AOP(result),"a",offr);
+ symbol *tlbl = newiTempLabel (NULL);
+
+ gencjneshort (left, right, lbl);
+
+ emitcode ("mov", "a,%s", one);
+ emitcode ("sjmp", "%05d$", tlbl->key + 100);
+ emitcode ("", "%05d$:", lbl->key + 100);
+ emitcode ("clr", "a");
+ emitcode ("", "%05d$:", tlbl->key + 100);
}
/*-----------------------------------------------------------------*/
-/* shiftL1Left2Result - shift left one byte from left to result */
+/* genCmpEq - generates code for equal to */
/*-----------------------------------------------------------------*/
-static void shiftL1Left2Result (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+genCmpEq (iCode * ic, iCode * ifx)
{
- char *l;
- l = aopGet(AOP(left),offl,FALSE,FALSE);
- MOVA(l);
- /* shift left accumulator */
- AccLsh(shCount);
- aopPut(AOP(result),"a",offr);
-}
+ operand *left, *right, *result;
-/*-----------------------------------------------------------------*/
-/* movLeft2Result - move byte from left to result */
-/*-----------------------------------------------------------------*/
-static void movLeft2Result (operand *left, int offl,
- operand *result, int offr, int sign)
-{
- char *l;
- if(!sameRegs(AOP(left),AOP(result)) || (offl != offr)){
- l = aopGet(AOP(left),offl,FALSE,FALSE);
-
- if (*l == '@' && (IS_AOP_PREG(result))) {
- emitcode("mov","a,%s",l);
- aopPut(AOP(result),"a",offr);
- } else {
- if(!sign)
- aopPut(AOP(result),l,offr);
- else{
- /* MSB sign in acc.7 ! */
- if(getDataSize(left) == offl+1){
- emitcode("mov","a,%s",l);
- aopPut(AOP(result),"a",offr);
- }
- }
- }
+ D(emitcode ("; genCmpEq",""));
+
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, TRUE);
+
+ /* if literal, literal on the right or
+ if the right is in a pointer register and left
+ is not */
+ if ((AOP_TYPE (IC_LEFT (ic)) == AOP_LIT) ||
+ (IS_AOP_PREG (right) && !IS_AOP_PREG (left)))
+ {
+ operand *t = IC_RIGHT (ic);
+ IC_RIGHT (ic) = IC_LEFT (ic);
+ IC_LEFT (ic) = t;
}
-}
-/*-----------------------------------------------------------------*/
-/* AccAXRrl1 - right rotate c->a:x->c by 1 */
-/*-----------------------------------------------------------------*/
-static void AccAXRrl1 (char *x)
-{
- emitcode("rrc","a");
- emitcode("xch","a,%s", x);
- emitcode("rrc","a");
- emitcode("xch","a,%s", x);
-}
+ if (ifx && !AOP_SIZE (result))
+ {
+ symbol *tlbl;
+ /* if they are both bit variables */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ ((AOP_TYPE (right) == AOP_CRY) || (AOP_TYPE (right) == AOP_LIT)))
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ unsigned long lit = (unsigned long) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit);
+ if (lit == 0L)
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("cpl", "c");
+ }
+ else if (lit == 1L)
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ else
+ {
+ emitcode ("clr", "c");
+ }
+ /* AOP_TYPE(right) == AOP_CRY */
+ }
+ else
+ {
+ symbol *lbl = newiTempLabel (NULL);
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("jb", "%s,%05d$", AOP (right)->aopu.aop_dir, (lbl->key + 100));
+ emitcode ("cpl", "c");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ }
+ /* if true label then we jump if condition
+ supplied is true */
+ tlbl = newiTempLabel (NULL);
+ if (IC_TRUE (ifx))
+ {
+ emitcode ("jnc", "%05d$", tlbl->key + 100);
+ emitcode ("ljmp", "%05d$", IC_TRUE (ifx)->key + 100);
+ }
+ else
+ {
+ emitcode ("jc", "%05d$", tlbl->key + 100);
+ emitcode ("ljmp", "%05d$", IC_FALSE (ifx)->key + 100);
+ }
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ else
+ {
+ tlbl = newiTempLabel (NULL);
+ gencjneshort (left, right, tlbl);
+ if (IC_TRUE (ifx))
+ {
+ emitcode ("ljmp", "%05d$", IC_TRUE (ifx)->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ else
+ {
+ symbol *lbl = newiTempLabel (NULL);
+ emitcode ("sjmp", "%05d$", lbl->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ emitcode ("ljmp", "%05d$", IC_FALSE (ifx)->key + 100);
+ emitcode ("", "%05d$:", lbl->key + 100);
+ }
+ }
+ /* mark the icode as generated */
+ ifx->generated = 1;
+ goto release;
+ }
+
+ /* if they are both bit variables */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ ((AOP_TYPE (right) == AOP_CRY) || (AOP_TYPE (right) == AOP_LIT)))
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ unsigned long lit = (unsigned long) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit);
+ if (lit == 0L)
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("cpl", "c");
+ }
+ else if (lit == 1L)
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ else
+ {
+ emitcode ("clr", "c");
+ }
+ /* AOP_TYPE(right) == AOP_CRY */
+ }
+ else
+ {
+ symbol *lbl = newiTempLabel (NULL);
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("jb", "%s,%05d$", AOP (right)->aopu.aop_dir, (lbl->key + 100));
+ emitcode ("cpl", "c");
+ emitcode ("", "%05d$:", (lbl->key + 100));
+ }
+ /* c = 1 if egal */
+ if (AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result))
+ {
+ outBitC (result);
+ goto release;
+ }
+ if (ifx)
+ {
+ genIfxJump (ifx, "c");
+ goto release;
+ }
+ /* if the result is used in an arithmetic operation
+ then put the result in place */
+ outBitC (result);
+ }
+ else
+ {
+ gencjne (left, right, newiTempLabel (NULL));
+ if (AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result))
+ {
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
+ if (ifx)
+ {
+ genIfxJump (ifx, "a");
+ goto release;
+ }
+ /* if the result is used in an arithmetic operation
+ then put the result in place */
+ if (AOP_TYPE (result) != AOP_CRY)
+ outAcc (result);
+ /* leave the result in acc */
+ }
+
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* ifxForOp - returns the icode containing the ifx for operand */
+/*-----------------------------------------------------------------*/
+static iCode *
+ifxForOp (operand * op, iCode * ic)
+{
+ /* if true symbol then needs to be assigned */
+ if (IS_TRUE_SYMOP (op))
+ return NULL;
+
+ /* if this has register type condition and
+ the next instruction is ifx with the same operand
+ and live to of the operand is upto the ifx only then */
+ if (ic->next &&
+ ic->next->op == IFX &&
+ IC_COND (ic->next)->key == op->key &&
+ OP_SYMBOL (op)->liveTo <= ic->next->seq)
+ return ic->next;
+
+ return NULL;
+}
+
+/*-----------------------------------------------------------------*/
+/* hasInc - operand is incremented before any other use */
+/*-----------------------------------------------------------------*/
+static iCode *
+hasInc (operand *op, iCode *ic,int osize)
+{
+ sym_link *type = operandType(op);
+ sym_link *retype = getSpec (type);
+ iCode *lic = ic->next;
+ int isize ;
+
+ /* this could from a cast, e.g.: "(char xdata *) 0x7654;" */
+ if (!IS_SYMOP(op)) return NULL;
+
+ if (IS_BITVAR(retype)||!IS_PTR(type)) return NULL;
+ if (IS_AGGREGATE(type->next)) return NULL;
+ if (osize != (isize = getSize(type->next))) return NULL;
+
+ while (lic) {
+ /* if operand of the form op = op + <sizeof *op> */
+ if (lic->op == '+' && isOperandEqual(IC_LEFT(lic),op) &&
+ isOperandEqual(IC_RESULT(lic),op) &&
+ isOperandLiteral(IC_RIGHT(lic)) &&
+ operandLitValue(IC_RIGHT(lic)) == isize) {
+ return lic;
+ }
+ /* if the operand used or deffed */
+ if (bitVectBitValue(OP_USES(op),lic->key) || (unsigned) lic->defKey == op->key) {
+ return NULL;
+ }
+ /* if GOTO or IFX */
+ if (lic->op == IFX || lic->op == GOTO || lic->op == LABEL) break;
+ lic = lic->next;
+ }
+ return NULL;
+}
+
+/*-----------------------------------------------------------------*/
+/* genAndOp - for && operation */
+/*-----------------------------------------------------------------*/
+static void
+genAndOp (iCode * ic)
+{
+ operand *left, *right, *result;
+ symbol *tlbl;
+
+ D(emitcode ("; genAndOp",""));
+
+ /* note here that && operations that are in an
+ if statement are taken away by backPatchLabels
+ only those used in arthmetic operations remain */
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, FALSE);
+
+ /* if both are bit variables */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ AOP_TYPE (right) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("anl", "c,%s", AOP (right)->aopu.aop_dir);
+ outBitC (result);
+ }
+ else
+ {
+ tlbl = newiTempLabel (NULL);
+ toBoolean (left);
+ emitcode ("jz", "%05d$", tlbl->key + 100);
+ toBoolean (right);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitAcc (result);
+ }
+
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+
+/*-----------------------------------------------------------------*/
+/* genOrOp - for || operation */
+/*-----------------------------------------------------------------*/
+static void
+genOrOp (iCode * ic)
+{
+ operand *left, *right, *result;
+ symbol *tlbl;
+
+ D(emitcode ("; genOrOp",""));
+
+ /* note here that || operations that are in an
+ if statement are taken away by backPatchLabels
+ only those used in arthmetic operations remain */
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, FALSE);
+
+ /* if both are bit variables */
+ if (AOP_TYPE (left) == AOP_CRY &&
+ AOP_TYPE (right) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("orl", "c,%s", AOP (right)->aopu.aop_dir);
+ outBitC (result);
+ }
+ else
+ {
+ tlbl = newiTempLabel (NULL);
+ toBoolean (left);
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ toBoolean (right);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitAcc (result);
+ }
+
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* isLiteralBit - test if lit == 2^n */
+/*-----------------------------------------------------------------*/
+static int
+isLiteralBit (unsigned long lit)
+{
+ unsigned long pw[32] =
+ {1L, 2L, 4L, 8L, 16L, 32L, 64L, 128L,
+ 0x100L, 0x200L, 0x400L, 0x800L,
+ 0x1000L, 0x2000L, 0x4000L, 0x8000L,
+ 0x10000L, 0x20000L, 0x40000L, 0x80000L,
+ 0x100000L, 0x200000L, 0x400000L, 0x800000L,
+ 0x1000000L, 0x2000000L, 0x4000000L, 0x8000000L,
+ 0x10000000L, 0x20000000L, 0x40000000L, 0x80000000L};
+ int idx;
+
+ for (idx = 0; idx < 32; idx++)
+ if (lit == pw[idx])
+ return idx + 1;
+ return 0;
+}
+
+/*-----------------------------------------------------------------*/
+/* continueIfTrue - */
+/*-----------------------------------------------------------------*/
+static void
+continueIfTrue (iCode * ic)
+{
+ if (IC_TRUE (ic))
+ emitcode ("ljmp", "%05d$", IC_TRUE (ic)->key + 100);
+ ic->generated = 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* jmpIfTrue - */
+/*-----------------------------------------------------------------*/
+static void
+jumpIfTrue (iCode * ic)
+{
+ if (!IC_TRUE (ic))
+ emitcode ("ljmp", "%05d$", IC_FALSE (ic)->key + 100);
+ ic->generated = 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* jmpTrueOrFalse - */
+/*-----------------------------------------------------------------*/
+static void
+jmpTrueOrFalse (iCode * ic, symbol * tlbl)
+{
+ // ugly but optimized by peephole
+ if (IC_TRUE (ic))
+ {
+ symbol *nlbl = newiTempLabel (NULL);
+ emitcode ("sjmp", "%05d$", nlbl->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ emitcode ("ljmp", "%05d$", IC_TRUE (ic)->key + 100);
+ emitcode ("", "%05d$:", nlbl->key + 100);
+ }
+ else
+ {
+ emitcode ("ljmp", "%05d$", IC_FALSE (ic)->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ ic->generated = 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* genAnd - code for and */
+/*-----------------------------------------------------------------*/
+static void
+genAnd (iCode * ic, iCode * ifx)
+{
+ operand *left, *right, *result;
+ int size, offset = 0;
+ unsigned long lit = 0L;
+ int bytelit = 0;
+ char buffer[10];
+
+ D(emitcode ("; genAnd",""));
+
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, TRUE);
+
+#ifdef DEBUG_TYPE
+ emitcode ("", "; Type res[%d] = l[%d]&r[%d]",
+ AOP_TYPE (result),
+ AOP_TYPE (left), AOP_TYPE (right));
+ emitcode ("", "; Size res[%d] = l[%d]&r[%d]",
+ AOP_SIZE (result),
+ AOP_SIZE (left), AOP_SIZE (right));
+#endif
+
+ /* if left is a literal & right is not then exchange them */
+ if ((AOP_TYPE (left) == AOP_LIT && AOP_TYPE (right) != AOP_LIT) ||
+ AOP_NEEDSACC (left))
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+
+ /* if result = right then exchange them */
+ if (sameRegs (AOP (result), AOP (right)))
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+
+ /* if right is bit then exchange them */
+ if (AOP_TYPE (right) == AOP_CRY &&
+ AOP_TYPE (left) != AOP_CRY)
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+ if (AOP_TYPE (right) == AOP_LIT)
+ lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit);
+
+ size = AOP_SIZE (result);
+
+ // if(bit & yy)
+ // result = bit & yy;
+ if (AOP_TYPE (left) == AOP_CRY)
+ {
+ // c = bit & literal;
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (lit & 1)
+ {
+ if (size && sameRegs (AOP (result), AOP (left)))
+ // no change
+ goto release;
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ else
+ {
+ // bit(result) = 0;
+ if (size && (AOP_TYPE (result) == AOP_CRY))
+ {
+ emitcode ("clr", "%s", AOP (result)->aopu.aop_dir);
+ goto release;
+ }
+ if ((AOP_TYPE (result) == AOP_CRY) && ifx)
+ {
+ jumpIfTrue (ifx);
+ goto release;
+ }
+ emitcode ("clr", "c");
+ }
+ }
+ else
+ {
+ if (AOP_TYPE (right) == AOP_CRY)
+ {
+ // c = bit & bit;
+ emitcode ("mov", "c,%s", AOP (right)->aopu.aop_dir);
+ emitcode ("anl", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ else
+ {
+ // c = bit & val;
+ MOVA (aopGet (AOP (right), 0, FALSE, FALSE));
+ // c = lsb
+ emitcode ("rrc", "a");
+ emitcode ("anl", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ }
+ // bit = c
+ // val = c
+ if (size)
+ outBitC (result);
+ // if(bit & ...)
+ else if ((AOP_TYPE (result) == AOP_CRY) && ifx)
+ genIfxJump (ifx, "c");
+ goto release;
+ }
+
+ // if(val & 0xZZ) - size = 0, ifx != FALSE -
+ // bit = val & 0xZZ - size = 1, ifx = FALSE -
+ if ((AOP_TYPE (right) == AOP_LIT) &&
+ (AOP_TYPE (result) == AOP_CRY) &&
+ (AOP_TYPE (left) != AOP_CRY))
+ {
+ int posbit = isLiteralBit (lit);
+ /* left & 2^n */
+ if (posbit)
+ {
+ posbit--;
+ MOVA (aopGet (AOP (left), posbit >> 3, FALSE, FALSE));
+ // bit = left & 2^n
+ if (size)
+ emitcode ("mov", "c,acc.%d", posbit & 0x07);
+ // if(left & 2^n)
+ else
+ {
+ if (ifx)
+ {
+ sprintf (buffer, "acc.%d", posbit & 0x07);
+ genIfxJump (ifx, buffer);
+ }
+ goto release;
+ }
+ }
+ else
+ {
+ symbol *tlbl = newiTempLabel (NULL);
+ int sizel = AOP_SIZE (left);
+ if (size)
+ emitcode ("setb", "c");
+ while (sizel--)
+ {
+ if ((bytelit = ((lit >> (offset * 8)) & 0x0FFL)) != 0x0L)
+ {
+ MOVA (aopGet (AOP (left), offset, FALSE, FALSE));
+ // byte == 2^n ?
+ if ((posbit = isLiteralBit (bytelit)) != 0)
+ emitcode ("jb", "acc.%d,%05d$", (posbit - 1) & 0x07, tlbl->key + 100);
+ else
+ {
+ if (bytelit != 0x0FFL)
+ emitcode ("anl", "a,%s",
+ aopGet (AOP (right), offset, FALSE, TRUE));
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ }
+ }
+ offset++;
+ }
+ // bit = left & literal
+ if (size)
+ {
+ emitcode ("clr", "c");
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ // if(left & literal)
+ else
+ {
+ if (ifx)
+ jmpTrueOrFalse (ifx, tlbl);
+ else
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ goto release;
+ }
+ }
+ outBitC (result);
+ goto release;
+ }
+
+ /* if left is same as result */
+ if (sameRegs (AOP (result), AOP (left)))
+ {
+ for (; size--; offset++)
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if ((bytelit = (int) ((lit >> (offset * 8)) & 0x0FFL)) == 0x0FF)
+ continue;
+ else if (bytelit == 0)
+ {
+ aopPut (AOP (result), zero, offset, isOperandVolatile (result, FALSE));
+ }
+ else if (IS_AOP_PREG (result))
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("anl", "a,%s", aopGet (AOP (left), offset, FALSE, TRUE));
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ emitcode ("anl", "%s,%s",
+ aopGet (AOP (left), offset, FALSE, TRUE),
+ aopGet (AOP (right), offset, FALSE, FALSE));
+ }
+ else
+ {
+ if (AOP_TYPE (left) == AOP_ACC)
+ emitcode ("anl", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ else
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ if (IS_AOP_PREG (result))
+ {
+ emitcode ("anl", "a,%s", aopGet (AOP (left), offset, FALSE, TRUE));
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+
+ }
+ else
+ emitcode ("anl", "%s,a",
+ aopGet (AOP (left), offset, FALSE, TRUE));
+ }
+ }
+ }
+ }
+ else
+ {
+ // left & result in different registers
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ // result = bit
+ // if(size), result in bit
+ // if(!size && ifx), conditional oper: if(left & right)
+ symbol *tlbl = newiTempLabel (NULL);
+ int sizer = min (AOP_SIZE (left), AOP_SIZE (right));
+ if (size)
+ emitcode ("setb", "c");
+ while (sizer--)
+ {
+ if (AOP_TYPE(right)==AOP_REG && AOP_TYPE(left)==AOP_ACC) {
+ emitcode ("anl", "a,%s",
+ aopGet (AOP (right), offset, FALSE, FALSE));
+ } else {
+ if (AOP_TYPE(left)==AOP_ACC) {
+ emitcode("mov", "b,a");
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode("anl", "a,b");
+ }else {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("anl", "a,%s",
+ aopGet (AOP (left), offset, FALSE, FALSE));
+ }
+ }
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ offset++;
+ }
+ if (size)
+ {
+ CLRC;
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitC (result);
+ }
+ else if (ifx)
+ jmpTrueOrFalse (ifx, tlbl);
+ else
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ else
+ {
+ for (; (size--); offset++)
+ {
+ // normal case
+ // result = left & right
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if ((bytelit = (int) ((lit >> (offset * 8)) & 0x0FFL)) == 0x0FF)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ continue;
+ }
+ else if (bytelit == 0)
+ {
+ /* dummy read of volatile operand */
+ if (isOperandVolatile (left, FALSE))
+ MOVA (aopGet (AOP (left), offset, FALSE, FALSE));
+ aopPut (AOP (result), zero, offset, isOperandVolatile (result, FALSE));
+ continue;
+ }
+ }
+ // faster than result <- left, anl result,right
+ // and better if result is SFR
+ if (AOP_TYPE (left) == AOP_ACC)
+ emitcode ("anl", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ else
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("anl", "a,%s",
+ aopGet (AOP (left), offset, FALSE, FALSE));
+ }
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ }
+ }
+
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genOr - code for or */
+/*-----------------------------------------------------------------*/
+static void
+genOr (iCode * ic, iCode * ifx)
+{
+ operand *left, *right, *result;
+ int size, offset = 0;
+ unsigned long lit = 0L;
+
+ D(emitcode ("; genOr",""));
+
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, TRUE);
+
+#ifdef DEBUG_TYPE
+ emitcode ("", "; Type res[%d] = l[%d]&r[%d]",
+ AOP_TYPE (result),
+ AOP_TYPE (left), AOP_TYPE (right));
+ emitcode ("", "; Size res[%d] = l[%d]&r[%d]",
+ AOP_SIZE (result),
+ AOP_SIZE (left), AOP_SIZE (right));
+#endif
+
+ /* if left is a literal & right is not then exchange them */
+ if ((AOP_TYPE (left) == AOP_LIT && AOP_TYPE (right) != AOP_LIT) ||
+ AOP_NEEDSACC (left))
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+
+ /* if result = right then exchange them */
+ if (sameRegs (AOP (result), AOP (right)))
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+
+ /* if right is bit then exchange them */
+ if (AOP_TYPE (right) == AOP_CRY &&
+ AOP_TYPE (left) != AOP_CRY)
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+ if (AOP_TYPE (right) == AOP_LIT)
+ lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit);
+
+ size = AOP_SIZE (result);
+
+ // if(bit | yy)
+ // xx = bit | yy;
+ if (AOP_TYPE (left) == AOP_CRY)
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ // c = bit | literal;
+ if (lit)
+ {
+ // lit != 0 => result = 1
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ if (size)
+ emitcode ("setb", "%s", AOP (result)->aopu.aop_dir);
+ else if (ifx)
+ continueIfTrue (ifx);
+ goto release;
+ }
+ emitcode ("setb", "c");
+ }
+ else
+ {
+ // lit == 0 => result = left
+ if (size && sameRegs (AOP (result), AOP (left)))
+ goto release;
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ }
+ else
+ {
+ if (AOP_TYPE (right) == AOP_CRY)
+ {
+ // c = bit | bit;
+ emitcode ("mov", "c,%s", AOP (right)->aopu.aop_dir);
+ emitcode ("orl", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ else
+ {
+ // c = bit | val;
+ symbol *tlbl = newiTempLabel (NULL);
+ if (!((AOP_TYPE (result) == AOP_CRY) && ifx))
+ emitcode ("setb", "c");
+ emitcode ("jb", "%s,%05d$",
+ AOP (left)->aopu.aop_dir, tlbl->key + 100);
+ toBoolean (right);
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ if ((AOP_TYPE (result) == AOP_CRY) && ifx)
+ {
+ jmpTrueOrFalse (ifx, tlbl);
+ goto release;
+ }
+ else
+ {
+ CLRC;
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ }
+ }
+ // bit = c
+ // val = c
+ if (size)
+ outBitC (result);
+ // if(bit | ...)
+ else if ((AOP_TYPE (result) == AOP_CRY) && ifx)
+ genIfxJump (ifx, "c");
+ goto release;
+ }
+
+ // if(val | 0xZZ) - size = 0, ifx != FALSE -
+ // bit = val | 0xZZ - size = 1, ifx = FALSE -
+ if ((AOP_TYPE (right) == AOP_LIT) &&
+ (AOP_TYPE (result) == AOP_CRY) &&
+ (AOP_TYPE (left) != AOP_CRY))
+ {
+ if (lit)
+ {
+ // result = 1
+ if (size)
+ emitcode ("setb", "%s", AOP (result)->aopu.aop_dir);
+ else
+ continueIfTrue (ifx);
+ goto release;
+ }
+ else
+ {
+ // lit = 0, result = boolean(left)
+ if (size)
+ emitcode ("setb", "c");
+ toBoolean (right);
+ if (size)
+ {
+ symbol *tlbl = newiTempLabel (NULL);
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ CLRC;
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ else
+ {
+ genIfxJump (ifx, "a");
+ goto release;
+ }
+ }
+ outBitC (result);
+ goto release;
+ }
+
+ /* if left is same as result */
+ if (sameRegs (AOP (result), AOP (left)))
+ {
+ for (; size--; offset++)
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (((lit >> (offset * 8)) & 0x0FFL) == 0x00L)
+ {
+ /* dummy read of volatile operand */
+ if (isOperandVolatile (left, FALSE))
+ MOVA (aopGet (AOP (left), offset, FALSE, FALSE));
+ else
+ continue;
+ }
+ else if (IS_AOP_PREG (left))
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("orl", "a,%s", aopGet (AOP (left), offset, FALSE, TRUE));
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ emitcode ("orl", "%s,%s",
+ aopGet (AOP (left), offset, FALSE, TRUE),
+ aopGet (AOP (right), offset, FALSE, FALSE));
+ }
+ else
+ {
+ if (AOP_TYPE (left) == AOP_ACC)
+ emitcode ("orl", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ else
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ if (IS_AOP_PREG (left))
+ {
+ emitcode ("orl", "a,%s", aopGet (AOP (left), offset, FALSE, TRUE));
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ emitcode ("orl", "%s,a",
+ aopGet (AOP (left), offset, FALSE, TRUE));
+ }
+ }
+ }
+ }
+ else
+ {
+ // left & result in different registers
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ // result = bit
+ // if(size), result in bit
+ // if(!size && ifx), conditional oper: if(left | right)
+ symbol *tlbl = newiTempLabel (NULL);
+ int sizer = max (AOP_SIZE (left), AOP_SIZE (right));
+ if (size)
+ emitcode ("setb", "c");
+ while (sizer--)
+ {
+ if (AOP_TYPE(right)==AOP_REG && AOP_TYPE(left)==AOP_ACC) {
+ emitcode ("orl", "a,%s",
+ aopGet (AOP (right), offset, FALSE, FALSE));
+ } else {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("orl", "a,%s",
+ aopGet (AOP (left), offset, FALSE, FALSE));
+ }
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ offset++;
+ }
+ if (size)
+ {
+ CLRC;
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitC (result);
+ }
+ else if (ifx)
+ jmpTrueOrFalse (ifx, tlbl);
+ else
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ else
+ for (; (size--); offset++)
+ {
+ // normal case
+ // result = left & right
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (((lit >> (offset * 8)) & 0x0FFL) == 0x00L)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ continue;
+ }
+ }
+ // faster than result <- left, anl result,right
+ // and better if result is SFR
+ if (AOP_TYPE (left) == AOP_ACC)
+ emitcode ("orl", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ else
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("orl", "a,%s",
+ aopGet (AOP (left), offset, FALSE, FALSE));
+ }
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ }
+
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genXor - code for xclusive or */
+/*-----------------------------------------------------------------*/
+static void
+genXor (iCode * ic, iCode * ifx)
+{
+ operand *left, *right, *result;
+ int size, offset = 0;
+ unsigned long lit = 0L;
+
+ D(emitcode ("; genXor",""));
+
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, TRUE);
+
+#ifdef DEBUG_TYPE
+ emitcode ("", "; Type res[%d] = l[%d]&r[%d]",
+ AOP_TYPE (result),
+ AOP_TYPE (left), AOP_TYPE (right));
+ emitcode ("", "; Size res[%d] = l[%d]&r[%d]",
+ AOP_SIZE (result),
+ AOP_SIZE (left), AOP_SIZE (right));
+#endif
+
+ /* if left is a literal & right is not ||
+ if left needs acc & right does not */
+ if ((AOP_TYPE (left) == AOP_LIT && AOP_TYPE (right) != AOP_LIT) ||
+ (AOP_NEEDSACC (left) && !AOP_NEEDSACC (right)))
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+
+ /* if result = right then exchange them */
+ if (sameRegs (AOP (result), AOP (right)))
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+
+ /* if right is bit then exchange them */
+ if (AOP_TYPE (right) == AOP_CRY &&
+ AOP_TYPE (left) != AOP_CRY)
+ {
+ operand *tmp = right;
+ right = left;
+ left = tmp;
+ }
+ if (AOP_TYPE (right) == AOP_LIT)
+ lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit);
+
+ size = AOP_SIZE (result);
+
+ // if(bit ^ yy)
+ // xx = bit ^ yy;
+ if (AOP_TYPE (left) == AOP_CRY)
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ // c = bit & literal;
+ if (lit >> 1)
+ {
+ // lit>>1 != 0 => result = 1
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ if (size)
+ emitcode ("setb", "%s", AOP (result)->aopu.aop_dir);
+ else if (ifx)
+ continueIfTrue (ifx);
+ goto release;
+ }
+ emitcode ("setb", "c");
+ }
+ else
+ {
+ // lit == (0 or 1)
+ if (lit == 0)
+ {
+ // lit == 0, result = left
+ if (size && sameRegs (AOP (result), AOP (left)))
+ goto release;
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ }
+ else
+ {
+ // lit == 1, result = not(left)
+ if (size && sameRegs (AOP (result), AOP (left)))
+ {
+ emitcode ("cpl", "%s", AOP (result)->aopu.aop_dir);
+ goto release;
+ }
+ else
+ {
+ emitcode ("mov", "c,%s", AOP (left)->aopu.aop_dir);
+ emitcode ("cpl", "c");
+ }
+ }
+ }
+
+ }
+ else
+ {
+ // right != literal
+ symbol *tlbl = newiTempLabel (NULL);
+ if (AOP_TYPE (right) == AOP_CRY)
+ {
+ // c = bit ^ bit;
+ emitcode ("mov", "c,%s", AOP (right)->aopu.aop_dir);
+ }
+ else
+ {
+ int sizer = AOP_SIZE (right);
+ // c = bit ^ val
+ // if val>>1 != 0, result = 1
+ emitcode ("setb", "c");
+ while (sizer)
+ {
+ MOVA (aopGet (AOP (right), sizer - 1, FALSE, FALSE));
+ if (sizer == 1)
+ // test the msb of the lsb
+ emitcode ("anl", "a,#0xfe");
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ sizer--;
+ }
+ // val = (0,1)
+ emitcode ("rrc", "a");
+ }
+ emitcode ("jnb", "%s,%05d$", AOP (left)->aopu.aop_dir, (tlbl->key + 100));
+ emitcode ("cpl", "c");
+ emitcode ("", "%05d$:", (tlbl->key + 100));
+ }
+ // bit = c
+ // val = c
+ if (size)
+ outBitC (result);
+ // if(bit | ...)
+ else if ((AOP_TYPE (result) == AOP_CRY) && ifx)
+ genIfxJump (ifx, "c");
+ goto release;
+ }
+
+ if (sameRegs (AOP (result), AOP (left)))
+ {
+ /* if left is same as result */
+ for (; size--; offset++)
+ {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (((lit >> (offset * 8)) & 0x0FFL) == 0x00L)
+ continue;
+ else if (IS_AOP_PREG (left))
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("xrl", "a,%s", aopGet (AOP (left), offset, FALSE, TRUE));
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ emitcode ("xrl", "%s,%s",
+ aopGet (AOP (left), offset, FALSE, TRUE),
+ aopGet (AOP (right), offset, FALSE, FALSE));
+ }
+ else
+ {
+ if (AOP_TYPE (left) == AOP_ACC)
+ emitcode ("xrl", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ else
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ if (IS_AOP_PREG (left))
+ {
+ emitcode ("xrl", "a,%s", aopGet (AOP (left), offset, FALSE, TRUE));
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ emitcode ("xrl", "%s,a",
+ aopGet (AOP (left), offset, FALSE, TRUE));
+ }
+ }
+ }
+ }
+ else
+ {
+ // left & result in different registers
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ // result = bit
+ // if(size), result in bit
+ // if(!size && ifx), conditional oper: if(left ^ right)
+ symbol *tlbl = newiTempLabel (NULL);
+ int sizer = max (AOP_SIZE (left), AOP_SIZE (right));
+ if (size)
+ emitcode ("setb", "c");
+ while (sizer--)
+ {
+ if ((AOP_TYPE (right) == AOP_LIT) &&
+ (((lit >> (offset * 8)) & 0x0FFL) == 0x00L))
+ {
+ MOVA (aopGet (AOP (left), offset, FALSE, FALSE));
+ }
+ else
+ {
+ if (AOP_TYPE(right)==AOP_REG && AOP_TYPE(left)==AOP_ACC) {
+ emitcode ("xrl", "a,%s",
+ aopGet (AOP (right), offset, FALSE, FALSE));
+ } else {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("xrl", "a,%s",
+ aopGet (AOP (left), offset, FALSE, FALSE));
+ }
+ }
+ emitcode ("jnz", "%05d$", tlbl->key + 100);
+ offset++;
+ }
+ if (size)
+ {
+ CLRC;
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ outBitC (result);
+ }
+ else if (ifx)
+ jmpTrueOrFalse (ifx, tlbl);
+ }
+ else
+ for (; (size--); offset++)
+ {
+ // normal case
+ // result = left & right
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (((lit >> (offset * 8)) & 0x0FFL) == 0x00L)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ continue;
+ }
+ }
+ // faster than result <- left, anl result,right
+ // and better if result is SFR
+ if (AOP_TYPE (left) == AOP_ACC)
+ emitcode ("xrl", "a,%s", aopGet (AOP (right), offset, FALSE, FALSE));
+ else
+ {
+ MOVA (aopGet (AOP (right), offset, FALSE, FALSE));
+ emitcode ("xrl", "a,%s",
+ aopGet (AOP (left), offset, FALSE, TRUE));
+ }
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ }
+
+release:
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genInline - write the inline code out */
+/*-----------------------------------------------------------------*/
+static void
+genInline (iCode * ic)
+{
+ char *buffer, *bp, *bp1;
+
+ D(emitcode ("; genInline",""));
+
+ _G.inLine += (!options.asmpeep);
+
+ buffer = bp = bp1 = Safe_calloc(1, strlen(IC_INLINE(ic))+1);
+ strcpy (buffer, IC_INLINE (ic));
+
+ /* emit each line as a code */
+ while (*bp)
+ {
+ if (*bp == '\n')
+ {
+ *bp++ = '\0';
+ emitcode (bp1, "");
+ bp1 = bp;
+ }
+ else
+ {
+ if (*bp == ':')
+ {
+ bp++;
+ *bp = '\0';
+ bp++;
+ emitcode (bp1, "");
+ bp1 = bp;
+ }
+ else
+ bp++;
+ }
+ }
+ if (bp1 != bp)
+ emitcode (bp1, "");
+ /* emitcode("",buffer); */
+ _G.inLine -= (!options.asmpeep);
+}
+
+/*-----------------------------------------------------------------*/
+/* genRRC - rotate right with carry */
+/*-----------------------------------------------------------------*/
+static void
+genRRC (iCode * ic)
+{
+ operand *left, *result;
+ int size, offset = 0;
+ char *l;
+
+ D(emitcode ("; genRRC",""));
+
+ /* rotate right with carry */
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* move it to the result */
+ size = AOP_SIZE (result);
+ offset = size - 1;
+ if (size == 1) { /* special case for 1 byte */
+ l = aopGet (AOP (left), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rr", "a");
+ goto release;
+ }
+ CLRC;
+ while (size--)
+ {
+ l = aopGet (AOP (left), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rrc", "a");
+ if (AOP_SIZE (result) > 1)
+ aopPut (AOP (result), "a", offset--, isOperandVolatile (result, FALSE));
+ }
+ /* now we need to put the carry into the
+ highest order byte of the result */
+ if (AOP_SIZE (result) > 1)
+ {
+ l = aopGet (AOP (result), AOP_SIZE (result) - 1, FALSE, FALSE);
+ MOVA (l);
+ }
+ emitcode ("mov", "acc.7,c");
+ release:
+ aopPut (AOP (result), "a", AOP_SIZE (result) - 1, isOperandVolatile (result, FALSE));
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genRLC - generate code for rotate left with carry */
+/*-----------------------------------------------------------------*/
+static void
+genRLC (iCode * ic)
+{
+ operand *left, *result;
+ int size, offset = 0;
+ char *l;
+
+ D(emitcode ("; genRLC",""));
+
+ /* rotate right with carry */
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* move it to the result */
+ size = AOP_SIZE (result);
+ offset = 0;
+ if (size--)
+ {
+ l = aopGet (AOP (left), offset, FALSE, FALSE);
+ MOVA (l);
+ if (size == 0) { /* special case for 1 byte */
+ emitcode("rl","a");
+ goto release;
+ }
+ emitcode ("add", "a,acc");
+ if (AOP_SIZE (result) > 1)
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ while (size--)
+ {
+ l = aopGet (AOP (left), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rlc", "a");
+ if (AOP_SIZE (result) > 1)
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ }
+ }
+ /* now we need to put the carry into the
+ highest order byte of the result */
+ if (AOP_SIZE (result) > 1)
+ {
+ l = aopGet (AOP (result), 0, FALSE, FALSE);
+ MOVA (l);
+ }
+ emitcode ("mov", "acc.0,c");
+ release:
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genGetHbit - generates code get highest order bit */
+/*-----------------------------------------------------------------*/
+static void
+genGetHbit (iCode * ic)
+{
+ operand *left, *result;
+
+ D(emitcode ("; genGetHbit",""));
+
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* get the highest order byte into a */
+ MOVA (aopGet (AOP (left), AOP_SIZE (left) - 1, FALSE, FALSE));
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
+ emitcode ("rlc", "a");
+ outBitC (result);
+ }
+ else
+ {
+ emitcode ("rl", "a");
+ emitcode ("anl", "a,#0x01");
+ outAcc (result);
+ }
+
+
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genSwap - generates code to swap nibbles or bytes */
+/*-----------------------------------------------------------------*/
+static void
+genSwap (iCode * ic)
+{
+ operand *left, *result;
+
+ D(emitcode ("; genSwap",""));
+
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ switch (AOP_SIZE (left))
+ {
+ case 1: /* swap nibbles in byte */
+ MOVA (aopGet (AOP (left), 0, FALSE, FALSE));
+ emitcode ("swap", "a");
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ break;
+ case 2: /* swap bytes in word */
+ if (AOP_TYPE(left) == AOP_REG && sameRegs(AOP(left), AOP(result)))
+ {
+ MOVA (aopGet (AOP (left), 0, FALSE, FALSE));
+ aopPut (AOP (result), aopGet (AOP (left), 1, FALSE, FALSE),
+ 0, isOperandVolatile (result, FALSE));
+ aopPut (AOP (result), "a", 1, isOperandVolatile (result, FALSE));
+ }
+ else if (operandsEqu (left, result))
+ {
+ char * reg = "a";
+ MOVA (aopGet (AOP (left), 0, FALSE, FALSE));
+ if (aopGetUsesAcc(AOP (left), 1) || aopGetUsesAcc(AOP (result), 0))
+ {
+ emitcode ("mov", "b,a");
+ reg = "b";
+ }
+ aopPut (AOP (result), aopGet (AOP (left), 1, FALSE, FALSE),
+ 0, isOperandVolatile (result, FALSE));
+ aopPut (AOP (result), reg, 1, isOperandVolatile (result, FALSE));
+ }
+ else
+ {
+ aopPut (AOP (result), aopGet (AOP (left), 1, FALSE, FALSE),
+ 0, isOperandVolatile (result, FALSE));
+ aopPut (AOP (result), aopGet (AOP (left), 0, FALSE, FALSE),
+ 1, isOperandVolatile (result, FALSE));
+ }
+ break;
+ default:
+ wassertl(FALSE, "unsupported SWAP operand size");
+ }
+
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+
+/*-----------------------------------------------------------------*/
+/* AccRol - rotate left accumulator by known count */
+/*-----------------------------------------------------------------*/
+static void
+AccRol (int shCount)
+{
+ shCount &= 0x0007; // shCount : 0..7
+
+ switch (shCount)
+ {
+ case 0:
+ break;
+ case 1:
+ emitcode ("rl", "a");
+ break;
+ case 2:
+ emitcode ("rl", "a");
+ emitcode ("rl", "a");
+ break;
+ case 3:
+ emitcode ("swap", "a");
+ emitcode ("rr", "a");
+ break;
+ case 4:
+ emitcode ("swap", "a");
+ break;
+ case 5:
+ emitcode ("swap", "a");
+ emitcode ("rl", "a");
+ break;
+ case 6:
+ emitcode ("rr", "a");
+ emitcode ("rr", "a");
+ break;
+ case 7:
+ emitcode ("rr", "a");
+ break;
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* AccLsh - left shift accumulator by known count */
+/*-----------------------------------------------------------------*/
+static void
+AccLsh (int shCount)
+{
+ if (shCount != 0)
+ {
+ if (shCount == 1)
+ emitcode ("add", "a,acc");
+ else if (shCount == 2)
+ {
+ emitcode ("add", "a,acc");
+ emitcode ("add", "a,acc");
+ }
+ else
+ {
+ /* rotate left accumulator */
+ AccRol (shCount);
+ /* and kill the lower order bits */
+ emitcode ("anl", "a,#0x%02x", SLMask[shCount]);
+ }
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* AccRsh - right shift accumulator by known count */
+/*-----------------------------------------------------------------*/
+static void
+AccRsh (int shCount)
+{
+ if (shCount != 0)
+ {
+ if (shCount == 1)
+ {
+ CLRC;
+ emitcode ("rrc", "a");
+ }
+ else
+ {
+ /* rotate right accumulator */
+ AccRol (8 - shCount);
+ /* and kill the higher order bits */
+ emitcode ("anl", "a,#0x%02x", SRMask[shCount]);
+ }
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* AccSRsh - signed right shift accumulator by known count */
+/*-----------------------------------------------------------------*/
+static void
+AccSRsh (int shCount)
+{
+ symbol *tlbl;
+ if (shCount != 0)
+ {
+ if (shCount == 1)
+ {
+ emitcode ("mov", "c,acc.7");
+ emitcode ("rrc", "a");
+ }
+ else if (shCount == 2)
+ {
+ emitcode ("mov", "c,acc.7");
+ emitcode ("rrc", "a");
+ emitcode ("mov", "c,acc.7");
+ emitcode ("rrc", "a");
+ }
+ else
+ {
+ tlbl = newiTempLabel (NULL);
+ /* rotate right accumulator */
+ AccRol (8 - shCount);
+ /* and kill the higher order bits */
+ emitcode ("anl", "a,#0x%02x", SRMask[shCount]);
+ emitcode ("jnb", "acc.%d,%05d$", 7 - shCount, tlbl->key + 100);
+ emitcode ("orl", "a,#0x%02x",
+ (unsigned char) ~SRMask[shCount]);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ }
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* shiftR1Left2Result - shift right one byte from left to result */
+/*-----------------------------------------------------------------*/
+static void
+shiftR1Left2Result (operand * left, int offl,
+ operand * result, int offr,
+ int shCount, int sign)
+{
+ MOVA (aopGet (AOP (left), offl, FALSE, FALSE));
+ /* shift right accumulator */
+ if (sign)
+ AccSRsh (shCount);
+ else
+ AccRsh (shCount);
+ aopPut (AOP (result), "a", offr, isOperandVolatile (result, FALSE));
+}
+
+/*-----------------------------------------------------------------*/
+/* shiftL1Left2Result - shift left one byte from left to result */
+/*-----------------------------------------------------------------*/
+static void
+shiftL1Left2Result (operand * left, int offl,
+ operand * result, int offr, int shCount)
+{
+ char *l;
+ l = aopGet (AOP (left), offl, FALSE, FALSE);
+ MOVA (l);
+ /* shift left accumulator */
+ AccLsh (shCount);
+ aopPut (AOP (result), "a", offr, isOperandVolatile (result, FALSE));
+}
+
+/*-----------------------------------------------------------------*/
+/* movLeft2Result - move byte from left to result */
+/*-----------------------------------------------------------------*/
+static void
+movLeft2Result (operand * left, int offl,
+ operand * result, int offr, int sign)
+{
+ char *l;
+ if (!sameRegs (AOP (left), AOP (result)) || (offl != offr))
+ {
+ l = aopGet (AOP (left), offl, FALSE, FALSE);
+
+ if (*l == '@' && (IS_AOP_PREG (result)))
+ {
+ emitcode ("mov", "a,%s", l);
+ aopPut (AOP (result), "a", offr, isOperandVolatile (result, FALSE));
+ }
+ else
+ {
+ if (!sign)
+ aopPut (AOP (result), l, offr, isOperandVolatile (result, FALSE));
+ else
+ {
+ /* MSB sign in acc.7 ! */
+ if (getDataSize (left) == offl + 1)
+ {
+ emitcode ("mov", "a,%s", l);
+ aopPut (AOP (result), "a", offr, isOperandVolatile (result, FALSE));
+ }
+ }
+ }
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* AccAXRrl1 - right rotate c->a:x->c by 1 */
+/*-----------------------------------------------------------------*/
+static void
+AccAXRrl1 (char *x)
+{
+ emitcode ("rrc", "a");
+ emitcode ("xch", "a,%s", x);
+ emitcode ("rrc", "a");
+ emitcode ("xch", "a,%s", x);
+}
+
+/*-----------------------------------------------------------------*/
+/* AccAXLrl1 - left rotate c<-a:x<-c by 1 */
+/*-----------------------------------------------------------------*/
+static void
+AccAXLrl1 (char *x)
+{
+ emitcode ("xch", "a,%s", x);
+ emitcode ("rlc", "a");
+ emitcode ("xch", "a,%s", x);
+ emitcode ("rlc", "a");
+}
+
+/*-----------------------------------------------------------------*/
+/* AccAXLsh1 - left shift a:x<-0 by 1 */
+/*-----------------------------------------------------------------*/
+static void
+AccAXLsh1 (char *x)
+{
+ emitcode ("xch", "a,%s", x);
+ emitcode ("add", "a,acc");
+ emitcode ("xch", "a,%s", x);
+ emitcode ("rlc", "a");
+}
+
+/*-----------------------------------------------------------------*/
+/* AccAXLsh - left shift a:x by known count (0..7) */
+/*-----------------------------------------------------------------*/
+static void
+AccAXLsh (char *x, int shCount)
+{
+ switch (shCount)
+ {
+ case 0:
+ break;
+ case 1:
+ AccAXLsh1 (x);
+ break;
+ case 2:
+ AccAXLsh1 (x);
+ AccAXLsh1 (x);
+ break;
+ case 3:
+ case 4:
+ case 5: // AAAAABBB:CCCCCDDD
+
+ AccRol (shCount); // BBBAAAAA:CCCCCDDD
+
+ emitcode ("anl", "a,#0x%02x",
+ SLMask[shCount]); // BBB00000:CCCCCDDD
+
+ emitcode ("xch", "a,%s", x); // CCCCCDDD:BBB00000
+
+ AccRol (shCount); // DDDCCCCC:BBB00000
+
+ emitcode ("xch", "a,%s", x); // BBB00000:DDDCCCCC
+
+ emitcode ("xrl", "a,%s", x); // (BBB^DDD)CCCCC:DDDCCCCC
+
+ emitcode ("xch", "a,%s", x); // DDDCCCCC:(BBB^DDD)CCCCC
+
+ emitcode ("anl", "a,#0x%02x",
+ SLMask[shCount]); // DDD00000:(BBB^DDD)CCCCC
+
+ emitcode ("xch", "a,%s", x); // (BBB^DDD)CCCCC:DDD00000
+
+ emitcode ("xrl", "a,%s", x); // BBBCCCCC:DDD00000
+
+ break;
+ case 6: // AAAAAABB:CCCCCCDD
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000000BB:CCCCCCDD
+ emitcode ("mov", "c,acc.0"); // c = B
+ emitcode ("xch", "a,%s", x); // CCCCCCDD:000000BB
+#if 0 // REMOVE ME
+ AccAXRrl1 (x); // BCCCCCCD:D000000B
+ AccAXRrl1 (x); // BBCCCCCC:DD000000
+#else
+ emitcode("rrc","a");
+ emitcode("xch","a,%s", x);
+ emitcode("rrc","a");
+ emitcode("mov","c,acc.0"); //<< get correct bit
+ emitcode("xch","a,%s", x);
+
+ emitcode("rrc","a");
+ emitcode("xch","a,%s", x);
+ emitcode("rrc","a");
+ emitcode("xch","a,%s", x);
+#endif
+ break;
+ case 7: // a:x <<= 7
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 0000000B:CCCCCCCD
+
+ emitcode ("mov", "c,acc.0"); // c = B
+
+ emitcode ("xch", "a,%s", x); // CCCCCCCD:0000000B
+
+ AccAXRrl1 (x); // BCCCCCCC:D0000000
+
+ break;
+ default:
+ break;
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* AccAXRsh - right shift a:x known count (0..7) */
+/*-----------------------------------------------------------------*/
+static void
+AccAXRsh (char *x, int shCount)
+{
+ switch (shCount)
+ {
+ case 0:
+ break;
+ case 1:
+ CLRC;
+ AccAXRrl1 (x); // 0->a:x
+
+ break;
+ case 2:
+ CLRC;
+ AccAXRrl1 (x); // 0->a:x
+
+ CLRC;
+ AccAXRrl1 (x); // 0->a:x
+
+ break;
+ case 3:
+ case 4:
+ case 5: // AAAAABBB:CCCCCDDD = a:x
+
+ AccRol (8 - shCount); // BBBAAAAA:DDDCCCCC
+
+ emitcode ("xch", "a,%s", x); // CCCCCDDD:BBBAAAAA
+
+ AccRol (8 - shCount); // DDDCCCCC:BBBAAAAA
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000CCCCC:BBBAAAAA
+
+ emitcode ("xrl", "a,%s", x); // BBB(CCCCC^AAAAA):BBBAAAAA
+
+ emitcode ("xch", "a,%s", x); // BBBAAAAA:BBB(CCCCC^AAAAA)
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000AAAAA:BBB(CCCCC^AAAAA)
+
+ emitcode ("xch", "a,%s", x); // BBB(CCCCC^AAAAA):000AAAAA
+
+ emitcode ("xrl", "a,%s", x); // BBBCCCCC:000AAAAA
+
+ emitcode ("xch", "a,%s", x); // 000AAAAA:BBBCCCCC
+
+ break;
+ case 6: // AABBBBBB:CCDDDDDD
+
+ emitcode ("mov", "c,acc.7");
+ AccAXLrl1 (x); // ABBBBBBC:CDDDDDDA
+
+ emitcode ("mov", "c,acc.7");
+ AccAXLrl1 (x); // BBBBBBCC:DDDDDDAA
+
+ emitcode ("xch", "a,%s", x); // DDDDDDAA:BBBBBBCC
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000000AA:BBBBBBCC
+
+ break;
+ case 7: // ABBBBBBB:CDDDDDDD
+
+ emitcode ("mov", "c,acc.7"); // c = A
+
+ AccAXLrl1 (x); // BBBBBBBC:DDDDDDDA
+
+ emitcode ("xch", "a,%s", x); // DDDDDDDA:BBBBBBCC
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 0000000A:BBBBBBBC
+
+ break;
+ default:
+ break;
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* AccAXRshS - right shift signed a:x known count (0..7) */
+/*-----------------------------------------------------------------*/
+static void
+AccAXRshS (char *x, int shCount)
+{
+ symbol *tlbl;
+ switch (shCount)
+ {
+ case 0:
+ break;
+ case 1:
+ emitcode ("mov", "c,acc.7");
+ AccAXRrl1 (x); // s->a:x
+
+ break;
+ case 2:
+ emitcode ("mov", "c,acc.7");
+ AccAXRrl1 (x); // s->a:x
+
+ emitcode ("mov", "c,acc.7");
+ AccAXRrl1 (x); // s->a:x
+
+ break;
+ case 3:
+ case 4:
+ case 5: // AAAAABBB:CCCCCDDD = a:x
+
+ tlbl = newiTempLabel (NULL);
+ AccRol (8 - shCount); // BBBAAAAA:CCCCCDDD
+
+ emitcode ("xch", "a,%s", x); // CCCCCDDD:BBBAAAAA
+
+ AccRol (8 - shCount); // DDDCCCCC:BBBAAAAA
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000CCCCC:BBBAAAAA
+
+ emitcode ("xrl", "a,%s", x); // BBB(CCCCC^AAAAA):BBBAAAAA
+
+ emitcode ("xch", "a,%s", x); // BBBAAAAA:BBB(CCCCC^AAAAA)
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000AAAAA:BBB(CCCCC^AAAAA)
+
+ emitcode ("xch", "a,%s", x); // BBB(CCCCC^AAAAA):000AAAAA
+
+ emitcode ("xrl", "a,%s", x); // BBBCCCCC:000AAAAA
+
+ emitcode ("xch", "a,%s", x); // 000SAAAA:BBBCCCCC
+
+ emitcode ("jnb", "acc.%d,%05d$", 7 - shCount, tlbl->key + 100);
+ emitcode ("orl", "a,#0x%02x",
+ (unsigned char) ~SRMask[shCount]); // 111AAAAA:BBBCCCCC
+
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ break; // SSSSAAAA:BBBCCCCC
+
+ case 6: // AABBBBBB:CCDDDDDD
+
+ tlbl = newiTempLabel (NULL);
+ emitcode ("mov", "c,acc.7");
+ AccAXLrl1 (x); // ABBBBBBC:CDDDDDDA
+
+ emitcode ("mov", "c,acc.7");
+ AccAXLrl1 (x); // BBBBBBCC:DDDDDDAA
+
+ emitcode ("xch", "a,%s", x); // DDDDDDAA:BBBBBBCC
+
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 000000AA:BBBBBBCC
+
+ emitcode ("jnb", "acc.%d,%05d$", 7 - shCount, tlbl->key + 100);
+ emitcode ("orl", "a,#0x%02x",
+ (unsigned char) ~SRMask[shCount]); // 111111AA:BBBBBBCC
+
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ break;
+ case 7: // ABBBBBBB:CDDDDDDD
-/*-----------------------------------------------------------------*/
-/* AccAXLrl1 - left rotate c<-a:x<-c by 1 */
-/*-----------------------------------------------------------------*/
-static void AccAXLrl1 (char *x)
-{
- emitcode("xch","a,%s",x);
- emitcode("rlc","a");
- emitcode("xch","a,%s",x);
- emitcode("rlc","a");
-}
+ tlbl = newiTempLabel (NULL);
+ emitcode ("mov", "c,acc.7"); // c = A
-/*-----------------------------------------------------------------*/
-/* AccAXLsh1 - left shift a:x<-0 by 1 */
-/*-----------------------------------------------------------------*/
-static void AccAXLsh1 (char *x)
-{
- emitcode("xch","a,%s",x);
- emitcode("add","a,acc");
- emitcode("xch","a,%s",x);
- emitcode("rlc","a");
-}
+ AccAXLrl1 (x); // BBBBBBBC:DDDDDDDA
-/*-----------------------------------------------------------------*/
-/* AccAXLsh - left shift a:x by known count (0..7) */
-/*-----------------------------------------------------------------*/
-static void AccAXLsh (char *x, int shCount)
-{
- switch(shCount){
- case 0 :
- break;
- case 1 :
- AccAXLsh1(x);
- break;
- case 2 :
- AccAXLsh1(x);
- AccAXLsh1(x);
- break;
- case 3 :
- case 4 :
- case 5 : // AAAAABBB:CCCCCDDD
- AccRol(shCount); // BBBAAAAA:CCCCCDDD
- emitcode("anl","a,#0x%02x",
- SLMask[shCount]); // BBB00000:CCCCCDDD
- emitcode("xch","a,%s",x); // CCCCCDDD:BBB00000
- AccRol(shCount); // DDDCCCCC:BBB00000
- emitcode("xch","a,%s",x); // BBB00000:DDDCCCCC
- emitcode("xrl","a,%s",x); // (BBB^DDD)CCCCC:DDDCCCCC
- emitcode("xch","a,%s",x); // DDDCCCCC:(BBB^DDD)CCCCC
- emitcode("anl","a,#0x%02x",
- SLMask[shCount]); // DDD00000:(BBB^DDD)CCCCC
- emitcode("xch","a,%s",x); // (BBB^DDD)CCCCC:DDD00000
- emitcode("xrl","a,%s",x); // BBBCCCCC:DDD00000
- break;
- case 6 : // AAAAAABB:CCCCCCDD
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000000BB:CCCCCCDD
- emitcode("mov","c,acc.0"); // c = B
- emitcode("xch","a,%s",x); // CCCCCCDD:000000BB
- AccAXRrl1(x); // BCCCCCCD:D000000B
- AccAXRrl1(x); // BBCCCCCC:DD000000
- break;
- case 7 : // a:x <<= 7
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 0000000B:CCCCCCCD
- emitcode("mov","c,acc.0"); // c = B
- emitcode("xch","a,%s",x); // CCCCCCCD:0000000B
- AccAXRrl1(x); // BCCCCCCC:D0000000
- break;
- default :
- break;
- }
-}
+ emitcode ("xch", "a,%s", x); // DDDDDDDA:BBBBBBCC
-/*-----------------------------------------------------------------*/
-/* AccAXRsh - right shift a:x known count (0..7) */
-/*-----------------------------------------------------------------*/
-static void AccAXRsh (char *x, int shCount)
-{
- switch(shCount){
- case 0 :
- break;
- case 1 :
- CLRC;
- AccAXRrl1(x); // 0->a:x
- break;
- case 2 :
- CLRC;
- AccAXRrl1(x); // 0->a:x
- CLRC;
- AccAXRrl1(x); // 0->a:x
- break;
- case 3 :
- case 4 :
- case 5 : // AAAAABBB:CCCCCDDD = a:x
- AccRol(8 - shCount); // BBBAAAAA:DDDCCCCC
- emitcode("xch","a,%s",x); // CCCCCDDD:BBBAAAAA
- AccRol(8 - shCount); // DDDCCCCC:BBBAAAAA
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000CCCCC:BBBAAAAA
- emitcode("xrl","a,%s",x); // BBB(CCCCC^AAAAA):BBBAAAAA
- emitcode("xch","a,%s",x); // BBBAAAAA:BBB(CCCCC^AAAAA)
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000AAAAA:BBB(CCCCC^AAAAA)
- emitcode("xch","a,%s",x); // BBB(CCCCC^AAAAA):000AAAAA
- emitcode("xrl","a,%s",x); // BBBCCCCC:000AAAAA
- emitcode("xch","a,%s",x); // 000AAAAA:BBBCCCCC
- break;
- case 6 : // AABBBBBB:CCDDDDDD
- emitcode("mov","c,acc.7");
- AccAXLrl1(x); // ABBBBBBC:CDDDDDDA
- AccAXLrl1(x); // BBBBBBCC:DDDDDDAA
- emitcode("xch","a,%s",x); // DDDDDDAA:BBBBBBCC
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000000AA:BBBBBBCC
- break;
- case 7 : // ABBBBBBB:CDDDDDDD
- emitcode("mov","c,acc.7"); // c = A
- AccAXLrl1(x); // BBBBBBBC:DDDDDDDA
- emitcode("xch","a,%s",x); // DDDDDDDA:BBBBBBCC
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 0000000A:BBBBBBBC
- break;
- default :
- break;
- }
-}
+ emitcode ("anl", "a,#0x%02x",
+ SRMask[shCount]); // 0000000A:BBBBBBBC
-/*-----------------------------------------------------------------*/
-/* AccAXRshS - right shift signed a:x known count (0..7) */
-/*-----------------------------------------------------------------*/
-static void AccAXRshS (char *x, int shCount)
-{
- symbol *tlbl ;
- switch(shCount){
- case 0 :
- break;
- case 1 :
- emitcode("mov","c,acc.7");
- AccAXRrl1(x); // s->a:x
- break;
- case 2 :
- emitcode("mov","c,acc.7");
- AccAXRrl1(x); // s->a:x
- emitcode("mov","c,acc.7");
- AccAXRrl1(x); // s->a:x
- break;
- case 3 :
- case 4 :
- case 5 : // AAAAABBB:CCCCCDDD = a:x
- tlbl = newiTempLabel(NULL);
- AccRol(8 - shCount); // BBBAAAAA:CCCCCDDD
- emitcode("xch","a,%s",x); // CCCCCDDD:BBBAAAAA
- AccRol(8 - shCount); // DDDCCCCC:BBBAAAAA
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000CCCCC:BBBAAAAA
- emitcode("xrl","a,%s",x); // BBB(CCCCC^AAAAA):BBBAAAAA
- emitcode("xch","a,%s",x); // BBBAAAAA:BBB(CCCCC^AAAAA)
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000AAAAA:BBB(CCCCC^AAAAA)
- emitcode("xch","a,%s",x); // BBB(CCCCC^AAAAA):000AAAAA
- emitcode("xrl","a,%s",x); // BBBCCCCC:000AAAAA
- emitcode("xch","a,%s",x); // 000SAAAA:BBBCCCCC
- emitcode("jnb","acc.%d,%05d$",7-shCount,tlbl->key+100);
- emitcode("orl","a,#0x%02x",
- (unsigned char)~SRMask[shCount]); // 111AAAAA:BBBCCCCC
- emitcode("","%05d$:",tlbl->key+100);
- break; // SSSSAAAA:BBBCCCCC
- case 6 : // AABBBBBB:CCDDDDDD
- tlbl = newiTempLabel(NULL);
- emitcode("mov","c,acc.7");
- AccAXLrl1(x); // ABBBBBBC:CDDDDDDA
- AccAXLrl1(x); // BBBBBBCC:DDDDDDAA
- emitcode("xch","a,%s",x); // DDDDDDAA:BBBBBBCC
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 000000AA:BBBBBBCC
- emitcode("jnb","acc.%d,%05d$",7-shCount,tlbl->key+100);
- emitcode("orl","a,#0x%02x",
- (unsigned char)~SRMask[shCount]); // 111111AA:BBBBBBCC
- emitcode("","%05d$:",tlbl->key+100);
- break;
- case 7 : // ABBBBBBB:CDDDDDDD
- tlbl = newiTempLabel(NULL);
- emitcode("mov","c,acc.7"); // c = A
- AccAXLrl1(x); // BBBBBBBC:DDDDDDDA
- emitcode("xch","a,%s",x); // DDDDDDDA:BBBBBBCC
- emitcode("anl","a,#0x%02x",
- SRMask[shCount]); // 0000000A:BBBBBBBC
- emitcode("jnb","acc.%d,%05d$",7-shCount,tlbl->key+100);
- emitcode("orl","a,#0x%02x",
- (unsigned char)~SRMask[shCount]); // 1111111A:BBBBBBBC
- emitcode("","%05d$:",tlbl->key+100);
- break;
- default :
- break;
+ emitcode ("jnb", "acc.%d,%05d$", 7 - shCount, tlbl->key + 100);
+ emitcode ("orl", "a,#0x%02x",
+ (unsigned char) ~SRMask[shCount]); // 1111111A:BBBBBBBC
+
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ break;
+ default:
+ break;
}
}
/*-----------------------------------------------------------------*/
/* shiftL2Left2Result - shift left two bytes from left to result */
/*-----------------------------------------------------------------*/
-static void shiftL2Left2Result (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+shiftL2Left2Result (operand * left, int offl,
+ operand * result, int offr, int shCount)
{
- if(sameRegs(AOP(result), AOP(left)) &&
- ((offl + MSB16) == offr)){
- /* don't crash result[offr] */
- MOVA(aopGet(AOP(left),offl,FALSE,FALSE));
- emitcode("xch","a,%s", aopGet(AOP(left),offl+MSB16,FALSE,FALSE));
- } else {
- movLeft2Result(left,offl, result, offr, 0);
- MOVA(aopGet(AOP(left),offl+MSB16,FALSE,FALSE));
+ if (sameRegs (AOP (result), AOP (left)) &&
+ ((offl + MSB16) == offr))
+ {
+ /* don't crash result[offr] */
+ MOVA (aopGet (AOP (left), offl, FALSE, FALSE));
+ emitcode ("xch", "a,%s", aopGet (AOP (left), offl + MSB16, FALSE, FALSE));
+ }
+ else
+ {
+ movLeft2Result (left, offl, result, offr, 0);
+ MOVA (aopGet (AOP (left), offl + MSB16, FALSE, FALSE));
}
- /* ax << shCount (x = lsb(result))*/
- AccAXLsh( aopGet(AOP(result),offr,FALSE,FALSE) , shCount);
- aopPut(AOP(result),"a",offr+MSB16);
+ /* ax << shCount (x = lsb(result)) */
+ AccAXLsh (aopGet (AOP (result), offr, FALSE, FALSE), shCount);
+ aopPut (AOP (result), "a", offr + MSB16, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
/* shiftR2Left2Result - shift right two bytes from left to result */
/*-----------------------------------------------------------------*/
-static void shiftR2Left2Result (operand *left, int offl,
- operand *result, int offr,
- int shCount, int sign)
+static void
+shiftR2Left2Result (operand * left, int offl,
+ operand * result, int offr,
+ int shCount, int sign)
{
- if(sameRegs(AOP(result), AOP(left)) &&
- ((offl + MSB16) == offr)){
- /* don't crash result[offr] */
- MOVA(aopGet(AOP(left),offl,FALSE,FALSE));
- emitcode("xch","a,%s", aopGet(AOP(left),offl+MSB16,FALSE,FALSE));
- } else {
- movLeft2Result(left,offl, result, offr, 0);
- MOVA(aopGet(AOP(left),offl+MSB16,FALSE,FALSE));
+ if (sameRegs (AOP (result), AOP (left)) &&
+ ((offl + MSB16) == offr))
+ {
+ /* don't crash result[offr] */
+ MOVA (aopGet (AOP (left), offl, FALSE, FALSE));
+ emitcode ("xch", "a,%s", aopGet (AOP (left), offl + MSB16, FALSE, FALSE));
}
- /* a:x >> shCount (x = lsb(result))*/
- if(sign)
- AccAXRshS( aopGet(AOP(result),offr,FALSE,FALSE) , shCount);
- else
- AccAXRsh( aopGet(AOP(result),offr,FALSE,FALSE) , shCount);
- if(getDataSize(result) > 1)
- aopPut(AOP(result),"a",offr+MSB16);
+ else
+ {
+ movLeft2Result (left, offl, result, offr, 0);
+ MOVA (aopGet (AOP (left), offl + MSB16, FALSE, FALSE));
+ }
+ /* a:x >> shCount (x = lsb(result)) */
+ if (sign)
+ AccAXRshS (aopGet (AOP (result), offr, FALSE, FALSE), shCount);
+ else
+ AccAXRsh (aopGet (AOP (result), offr, FALSE, FALSE), shCount);
+ if (getDataSize (result) > 1)
+ aopPut (AOP (result), "a", offr + MSB16, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
-/* shiftLLeftOrResult - shift left one byte from left, or to result*/
+/* shiftLLeftOrResult - shift left one byte from left, or to result */
/*-----------------------------------------------------------------*/
-static void shiftLLeftOrResult (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+shiftLLeftOrResult (operand * left, int offl,
+ operand * result, int offr, int shCount)
{
- MOVA(aopGet(AOP(left),offl,FALSE,FALSE));
- /* shift left accumulator */
- AccLsh(shCount);
- /* or with result */
- emitcode("orl","a,%s", aopGet(AOP(result),offr,FALSE,FALSE));
- /* back to result */
- aopPut(AOP(result),"a",offr);
+ MOVA (aopGet (AOP (left), offl, FALSE, FALSE));
+ /* shift left accumulator */
+ AccLsh (shCount);
+ /* or with result */
+ emitcode ("orl", "a,%s", aopGet (AOP (result), offr, FALSE, FALSE));
+ /* back to result */
+ aopPut (AOP (result), "a", offr, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
-/* shiftRLeftOrResult - shift right one byte from left,or to result*/
+/* shiftRLeftOrResult - shift right one byte from left,or to result */
/*-----------------------------------------------------------------*/
-static void shiftRLeftOrResult (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+shiftRLeftOrResult (operand * left, int offl,
+ operand * result, int offr, int shCount)
{
- MOVA(aopGet(AOP(left),offl,FALSE,FALSE));
- /* shift right accumulator */
- AccRsh(shCount);
- /* or with result */
- emitcode("orl","a,%s", aopGet(AOP(result),offr,FALSE,FALSE));
- /* back to result */
- aopPut(AOP(result),"a",offr);
+ MOVA (aopGet (AOP (left), offl, FALSE, FALSE));
+ /* shift right accumulator */
+ AccRsh (shCount);
+ /* or with result */
+ emitcode ("orl", "a,%s", aopGet (AOP (result), offr, FALSE, FALSE));
+ /* back to result */
+ aopPut (AOP (result), "a", offr, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
/* genlshOne - left shift a one byte quantity by known count */
/*-----------------------------------------------------------------*/
-static void genlshOne (operand *result, operand *left, int shCount)
-{
- shiftL1Left2Result(left, LSB, result, LSB, shCount);
+static void
+genlshOne (operand * result, operand * left, int shCount)
+{
+ D(emitcode ("; genlshOne",""));
+
+ shiftL1Left2Result (left, LSB, result, LSB, shCount);
}
/*-----------------------------------------------------------------*/
/* genlshTwo - left shift two bytes by known amount != 0 */
/*-----------------------------------------------------------------*/
-static void genlshTwo (operand *result,operand *left, int shCount)
+static void
+genlshTwo (operand * result, operand * left, int shCount)
{
- int size;
-
- size = getDataSize(result);
+ int size;
- /* if shCount >= 8 */
- if (shCount >= 8) {
- shCount -= 8 ;
+ D(emitcode ("; genlshTwo",""));
- if (size > 1){
- if (shCount)
- shiftL1Left2Result(left, LSB, result, MSB16, shCount);
- else
- movLeft2Result(left, LSB, result, MSB16, 0);
- }
- aopPut(AOP(result),zero,LSB);
+ size = getDataSize (result);
+
+ /* if shCount >= 8 */
+ if (shCount >= 8)
+ {
+ shCount -= 8;
+
+ if (size > 1)
+ {
+ if (shCount)
+ shiftL1Left2Result (left, LSB, result, MSB16, shCount);
+ else
+ movLeft2Result (left, LSB, result, MSB16, 0);
+ }
+ aopPut (AOP (result), zero, LSB, isOperandVolatile (result, FALSE));
}
- /* 1 <= shCount <= 7 */
- else {
- if(size == 1)
- shiftL1Left2Result(left, LSB, result, LSB, shCount);
- else
- shiftL2Left2Result(left, LSB, result, LSB, shCount);
+ /* 1 <= shCount <= 7 */
+ else
+ {
+ if (size == 1)
+ shiftL1Left2Result (left, LSB, result, LSB, shCount);
+ else
+ shiftL2Left2Result (left, LSB, result, LSB, shCount);
}
}
/* shiftLLong - shift left one long from left to result */
/* offl = LSB or MSB16 */
/*-----------------------------------------------------------------*/
-static void shiftLLong (operand *left, operand *result, int offr )
+static void
+shiftLLong (operand * left, operand * result, int offr)
{
- char *l;
- int size = AOP_SIZE(result);
+ char *l;
+ int size = AOP_SIZE (result);
- if(size >= LSB+offr){
- l = aopGet(AOP(left),LSB,FALSE,FALSE);
- MOVA(l);
- emitcode("add","a,acc");
- if (sameRegs(AOP(left),AOP(result)) &&
- size >= MSB16+offr && offr != LSB )
- emitcode("xch","a,%s",
- aopGet(AOP(left),LSB+offr,FALSE,FALSE));
- else
- aopPut(AOP(result),"a",LSB+offr);
- }
-
- if(size >= MSB16+offr){
- if (!(sameRegs(AOP(result),AOP(left)) && size >= MSB16+offr && offr != LSB) ) {
- l = aopGet(AOP(left),MSB16,FALSE,FALSE);
- MOVA(l);
+ if (size >= LSB + offr)
+ {
+ l = aopGet (AOP (left), LSB, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("add", "a,acc");
+ if (sameRegs (AOP (left), AOP (result)) &&
+ size >= MSB16 + offr && offr != LSB)
+ emitcode ("xch", "a,%s",
+ aopGet (AOP (left), LSB + offr, FALSE, FALSE));
+ else
+ aopPut (AOP (result), "a", LSB + offr, isOperandVolatile (result, FALSE));
+ }
+
+ if (size >= MSB16 + offr)
+ {
+ if (!(sameRegs (AOP (result), AOP (left)) && size >= MSB16 + offr && offr != LSB))
+ {
+ l = aopGet (AOP (left), MSB16, FALSE, FALSE);
+ MOVA (l);
}
- emitcode("rlc","a");
- if (sameRegs(AOP(left),AOP(result)) &&
- size >= MSB24+offr && offr != LSB)
- emitcode("xch","a,%s",
- aopGet(AOP(left),MSB16+offr,FALSE,FALSE));
- else
- aopPut(AOP(result),"a",MSB16+offr);
+ emitcode ("rlc", "a");
+ if (sameRegs (AOP (left), AOP (result)) &&
+ size >= MSB24 + offr && offr != LSB)
+ emitcode ("xch", "a,%s",
+ aopGet (AOP (left), MSB16 + offr, FALSE, FALSE));
+ else
+ aopPut (AOP (result), "a", MSB16 + offr, isOperandVolatile (result, FALSE));
}
- if(size >= MSB24+offr){
- if (!(sameRegs(AOP(left),AOP(left)) && size >= MSB24+offr && offr != LSB)) {
- l = aopGet(AOP(left),MSB24,FALSE,FALSE);
- MOVA(l);
+ if (size >= MSB24 + offr)
+ {
+ if (!(sameRegs (AOP (left), AOP (left)) && size >= MSB24 + offr && offr != LSB))
+ {
+ l = aopGet (AOP (left), MSB24, FALSE, FALSE);
+ MOVA (l);
}
- emitcode("rlc","a");
- if (sameRegs(AOP(left),AOP(result)) &&
- size >= MSB32+offr && offr != LSB )
- emitcode("xch","a,%s",
- aopGet(AOP(left),MSB24+offr,FALSE,FALSE));
- else
- aopPut(AOP(result),"a",MSB24+offr);
+ emitcode ("rlc", "a");
+ if (sameRegs (AOP (left), AOP (result)) &&
+ size >= MSB32 + offr && offr != LSB)
+ emitcode ("xch", "a,%s",
+ aopGet (AOP (left), MSB24 + offr, FALSE, FALSE));
+ else
+ aopPut (AOP (result), "a", MSB24 + offr, isOperandVolatile (result, FALSE));
}
- if(size > MSB32+offr){
- if (!(sameRegs(AOP(result),AOP(left)) && size >= MSB32+offr && offr != LSB)) {
- l = aopGet(AOP(left),MSB32,FALSE,FALSE);
- MOVA(l);
+ if (size > MSB32 + offr)
+ {
+ if (!(sameRegs (AOP (result), AOP (left)) && size >= MSB32 + offr && offr != LSB))
+ {
+ l = aopGet (AOP (left), MSB32, FALSE, FALSE);
+ MOVA (l);
}
- emitcode("rlc","a");
- aopPut(AOP(result),"a",MSB32+offr);
+ emitcode ("rlc", "a");
+ aopPut (AOP (result), "a", MSB32 + offr, isOperandVolatile (result, FALSE));
}
- if(offr != LSB)
- aopPut(AOP(result),zero,LSB);
+ if (offr != LSB)
+ aopPut (AOP (result), zero, LSB, isOperandVolatile (result, FALSE));
}
/*-----------------------------------------------------------------*/
/* genlshFour - shift four byte by a known amount != 0 */
/*-----------------------------------------------------------------*/
-static void genlshFour (operand *result, operand *left, int shCount)
-{
- int size;
-
- size = AOP_SIZE(result);
-
- /* if shifting more that 3 bytes */
- if (shCount >= 24 ) {
- shCount -= 24;
- if (shCount)
- /* lowest order of left goes to the highest
- order of the destination */
- shiftL1Left2Result(left, LSB, result, MSB32, shCount);
- else
- movLeft2Result(left, LSB, result, MSB32, 0);
- aopPut(AOP(result),zero,LSB);
- aopPut(AOP(result),zero,MSB16);
- aopPut(AOP(result),zero,MSB32);
- return;
- }
-
- /* more than two bytes */
- else if ( shCount >= 16 ) {
- /* lower order two bytes goes to higher order two bytes */
- shCount -= 16;
- /* if some more remaining */
- if (shCount)
- shiftL2Left2Result(left, LSB, result, MSB24, shCount);
- else {
- movLeft2Result(left, MSB16, result, MSB32, 0);
- movLeft2Result(left, LSB, result, MSB24, 0);
- }
- aopPut(AOP(result),zero,MSB16);
- aopPut(AOP(result),zero,LSB);
- return;
- }
-
- /* if more than 1 byte */
- else if ( shCount >= 8 ) {
- /* lower order three bytes goes to higher order three bytes */
- shCount -= 8;
- if(size == 2){
- if(shCount)
- shiftL1Left2Result(left, LSB, result, MSB16, shCount);
- else
- movLeft2Result(left, LSB, result, MSB16, 0);
- }
- else{ /* size = 4 */
- if(shCount == 0){
- movLeft2Result(left, MSB24, result, MSB32, 0);
- movLeft2Result(left, MSB16, result, MSB24, 0);
- movLeft2Result(left, LSB, result, MSB16, 0);
- aopPut(AOP(result),zero,LSB);
- }
- else if(shCount == 1)
- shiftLLong(left, result, MSB16);
- else{
- shiftL2Left2Result(left, MSB16, result, MSB24, shCount);
- shiftL1Left2Result(left, LSB, result, MSB16, shCount);
- shiftRLeftOrResult(left, LSB, result, MSB24, 8 - shCount);
- aopPut(AOP(result),zero,LSB);
- }
- }
+static void
+genlshFour (operand * result, operand * left, int shCount)
+{
+ int size;
+
+ D(emitcode ("; genlshFour",""));
+
+ size = AOP_SIZE (result);
+
+ /* if shifting more that 3 bytes */
+ if (shCount >= 24)
+ {
+ shCount -= 24;
+ if (shCount)
+ /* lowest order of left goes to the highest
+ order of the destination */
+ shiftL1Left2Result (left, LSB, result, MSB32, shCount);
+ else
+ movLeft2Result (left, LSB, result, MSB32, 0);
+ aopPut (AOP (result), zero, LSB, isOperandVolatile (result, FALSE));
+ aopPut (AOP (result), zero, MSB16, isOperandVolatile (result, FALSE));
+ aopPut (AOP (result), zero, MSB24, isOperandVolatile (result, FALSE));
+ return;
+ }
+
+ /* more than two bytes */
+ else if (shCount >= 16)
+ {
+ /* lower order two bytes goes to higher order two bytes */
+ shCount -= 16;
+ /* if some more remaining */
+ if (shCount)
+ shiftL2Left2Result (left, LSB, result, MSB24, shCount);
+ else
+ {
+ movLeft2Result (left, MSB16, result, MSB32, 0);
+ movLeft2Result (left, LSB, result, MSB24, 0);
+ }
+ aopPut (AOP (result), zero, MSB16, isOperandVolatile (result, FALSE));
+ aopPut (AOP (result), zero, LSB, isOperandVolatile (result, FALSE));
+ return;
+ }
+
+ /* if more than 1 byte */
+ else if (shCount >= 8)
+ {
+ /* lower order three bytes goes to higher order three bytes */
+ shCount -= 8;
+ if (size == 2)
+ {
+ if (shCount)
+ shiftL1Left2Result (left, LSB, result, MSB16, shCount);
+ else
+ movLeft2Result (left, LSB, result, MSB16, 0);
+ }
+ else
+ { /* size = 4 */
+ if (shCount == 0)
+ {
+ movLeft2Result (left, MSB24, result, MSB32, 0);
+ movLeft2Result (left, MSB16, result, MSB24, 0);
+ movLeft2Result (left, LSB, result, MSB16, 0);
+ aopPut (AOP (result), zero, LSB, isOperandVolatile (result, FALSE));
+ }
+ else if (shCount == 1)
+ shiftLLong (left, result, MSB16);
+ else
+ {
+ shiftL2Left2Result (left, MSB16, result, MSB24, shCount);
+ shiftL1Left2Result (left, LSB, result, MSB16, shCount);
+ shiftRLeftOrResult (left, LSB, result, MSB24, 8 - shCount);
+ aopPut (AOP (result), zero, LSB, isOperandVolatile (result, FALSE));
+ }
+ }
}
- /* 1 <= shCount <= 7 */
- else if(shCount <= 2){
- shiftLLong(left, result, LSB);
- if(shCount == 2)
- shiftLLong(result, result, LSB);
+ /* 1 <= shCount <= 7 */
+ else if (shCount <= 2)
+ {
+ shiftLLong (left, result, LSB);
+ if (shCount == 2)
+ shiftLLong (result, result, LSB);
}
- /* 3 <= shCount <= 7, optimize */
- else{
- shiftL2Left2Result(left, MSB24, result, MSB24, shCount);
- shiftRLeftOrResult(left, MSB16, result, MSB24, 8 - shCount);
- shiftL2Left2Result(left, LSB, result, LSB, shCount);
+ /* 3 <= shCount <= 7, optimize */
+ else
+ {
+ shiftL2Left2Result (left, MSB24, result, MSB24, shCount);
+ shiftRLeftOrResult (left, MSB16, result, MSB24, 8 - shCount);
+ shiftL2Left2Result (left, LSB, result, LSB, shCount);
}
}
/*-----------------------------------------------------------------*/
/* genLeftShiftLiteral - left shifting by known count */
/*-----------------------------------------------------------------*/
-static void genLeftShiftLiteral (operand *left,
- operand *right,
- operand *result,
- iCode *ic)
-{
- int shCount = (int) floatFromVal (AOP(right)->aopu.aop_lit);
- int size;
+static void
+genLeftShiftLiteral (operand * left,
+ operand * right,
+ operand * result,
+ iCode * ic)
+{
+ int shCount = (int) floatFromVal (AOP (right)->aopu.aop_lit);
+ int size;
+
+ D(emitcode ("; genLeftShiftLiteral",""));
- freeAsmop(right,NULL,ic,TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
- size = getSize(operandType(result));
+ size = getSize (operandType (result));
#if VIEW_SIZE
- emitcode("; shift left ","result %d, left %d",size,
- AOP_SIZE(left));
+ emitcode ("; shift left ", "result %d, left %d", size,
+ AOP_SIZE (left));
#endif
- /* I suppose that the left size >= result size */
- if(shCount == 0){
- while(size--){
- movLeft2Result(left, size, result, size, 0);
- }
+ /* I suppose that the left size >= result size */
+ if (shCount == 0)
+ {
+ while (size--)
+ {
+ movLeft2Result (left, size, result, size, 0);
+ }
}
- else if(shCount >= (size * 8))
- while(size--)
- aopPut(AOP(result),zero,size);
- else{
- switch (size) {
- case 1:
- genlshOne (result,left,shCount);
- break;
-
- case 2:
- case 3:
- genlshTwo (result,left,shCount);
- break;
-
- case 4:
- genlshFour (result,left,shCount);
- break;
- }
+ else if (shCount >= (size * 8))
+ while (size--)
+ aopPut (AOP (result), zero, size, isOperandVolatile (result, FALSE));
+ else
+ {
+ switch (size)
+ {
+ case 1:
+ genlshOne (result, left, shCount);
+ break;
+
+ case 2:
+ genlshTwo (result, left, shCount);
+ break;
+
+ case 4:
+ genlshFour (result, left, shCount);
+ break;
+ default:
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "*** ack! mystery literal shift!\n");
+ break;
+ }
}
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genLeftShift - generates code for left shifting */
/*-----------------------------------------------------------------*/
-static void genLeftShift (iCode *ic)
-{
- operand *left,*right, *result;
- int size, offset;
- char *l;
- symbol *tlbl , *tlbl1;
-
- right = IC_RIGHT(ic);
- left = IC_LEFT(ic);
- result = IC_RESULT(ic);
-
- aopOp(right,ic,FALSE);
-
- /* if the shift count is known then do it
- as efficiently as possible */
- if (AOP_TYPE(right) == AOP_LIT) {
- genLeftShiftLiteral (left,right,result,ic);
- return ;
- }
-
- /* shift count is unknown then we have to form
- a loop get the loop count in B : Note: we take
- only the lower order byte since shifting
- more that 32 bits make no sense anyway, ( the
- largest size of an object can be only 32 bits ) */
-
- emitcode("mov","b,%s",aopGet(AOP(right),0,FALSE,FALSE));
- emitcode("inc","b");
- freeAsmop (right,NULL,ic,TRUE);
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
-
- /* now move the left to the result if they are not the
- same */
- if (!sameRegs(AOP(left),AOP(result)) &&
- AOP_SIZE(result) > 1) {
-
- size = AOP_SIZE(result);
- offset=0;
- while (size--) {
- l = aopGet(AOP(left),offset,FALSE,TRUE);
- if (*l == '@' && (IS_AOP_PREG(result))) {
-
- emitcode("mov","a,%s",l);
- aopPut(AOP(result),"a",offset);
- } else
- aopPut(AOP(result),l,offset);
- offset++;
- }
- }
+static void
+genLeftShift (iCode * ic)
+{
+ operand *left, *right, *result;
+ int size, offset;
+ char *l;
+ symbol *tlbl, *tlbl1;
- tlbl = newiTempLabel(NULL);
- size = AOP_SIZE(result);
- offset = 0 ;
- tlbl1 = newiTempLabel(NULL);
+ D(emitcode ("; genLeftShift",""));
- /* if it is only one byte then */
- if (size == 1) {
- symbol *tlbl1 = newiTempLabel(NULL);
+ right = IC_RIGHT (ic);
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- emitcode("add","a,acc");
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
- aopPut(AOP(result),"a",0);
- goto release ;
+ aopOp (right, ic, FALSE);
+
+ /* if the shift count is known then do it
+ as efficiently as possible */
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ genLeftShiftLiteral (left, right, result, ic);
+ return;
+ }
+
+ /* shift count is unknown then we have to form
+ a loop get the loop count in B : Note: we take
+ only the lower order byte since shifting
+ more that 32 bits make no sense anyway, ( the
+ largest size of an object can be only 32 bits ) */
+
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ emitcode ("inc", "b");
+ freeAsmop (right, NULL, ic, TRUE);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* now move the left to the result if they are not the
+ same */
+ if (!sameRegs (AOP (left), AOP (result)) &&
+ AOP_SIZE (result) > 1)
+ {
+
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--)
+ {
+ l = aopGet (AOP (left), offset, FALSE, TRUE);
+ if (*l == '@' && (IS_AOP_PREG (result)))
+ {
+
+ emitcode ("mov", "a,%s", l);
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ aopPut (AOP (result), l, offset, isOperandVolatile (result, FALSE));
+ offset++;
+ }
}
-
- reAdjustPreg(AOP(result));
-
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- l = aopGet(AOP(result),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("add","a,acc");
- aopPut(AOP(result),"a",offset++);
- while (--size) {
- l = aopGet(AOP(result),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("rlc","a");
- aopPut(AOP(result),"a",offset++);
- }
- reAdjustPreg(AOP(result));
-
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
+
+ tlbl = newiTempLabel (NULL);
+ size = AOP_SIZE (result);
+ offset = 0;
+ tlbl1 = newiTempLabel (NULL);
+
+ /* if it is only one byte then */
+ if (size == 1)
+ {
+ symbol *tlbl1 = newiTempLabel (NULL);
+
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("sjmp", "%05d$", tlbl1->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ emitcode ("add", "a,acc");
+ emitcode ("", "%05d$:", tlbl1->key + 100);
+ emitcode ("djnz", "b,%05d$", tlbl->key + 100);
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
+
+ reAdjustPreg (AOP (result));
+
+ emitcode ("sjmp", "%05d$", tlbl1->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ l = aopGet (AOP (result), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("add", "a,acc");
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ while (--size)
+ {
+ l = aopGet (AOP (result), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rlc", "a");
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ }
+ reAdjustPreg (AOP (result));
+
+ emitcode ("", "%05d$:", tlbl1->key + 100);
+ emitcode ("djnz", "b,%05d$", tlbl->key + 100);
release:
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genrshOne - right shift a one byte quantity by known count */
/*-----------------------------------------------------------------*/
-static void genrshOne (operand *result, operand *left,
- int shCount, int sign)
+static void
+genrshOne (operand * result, operand * left,
+ int shCount, int sign)
{
- shiftR1Left2Result(left, LSB, result, LSB, shCount, sign);
+ D(emitcode ("; genrshOne",""));
+
+ shiftR1Left2Result (left, LSB, result, LSB, shCount, sign);
}
/*-----------------------------------------------------------------*/
/* genrshTwo - right shift two bytes by known amount != 0 */
/*-----------------------------------------------------------------*/
-static void genrshTwo (operand *result,operand *left,
- int shCount, int sign)
+static void
+genrshTwo (operand * result, operand * left,
+ int shCount, int sign)
{
- /* if shCount >= 8 */
- if (shCount >= 8) {
- shCount -= 8 ;
- if (shCount)
- shiftR1Left2Result(left, MSB16, result, LSB,
- shCount, sign);
- else
- movLeft2Result(left, MSB16, result, LSB, sign);
- addSign(result, MSB16, sign);
+ D(emitcode ("; genrshTwo",""));
+
+ /* if shCount >= 8 */
+ if (shCount >= 8)
+ {
+ shCount -= 8;
+ if (shCount)
+ shiftR1Left2Result (left, MSB16, result, LSB,
+ shCount, sign);
+ else
+ movLeft2Result (left, MSB16, result, LSB, sign);
+ addSign (result, MSB16, sign);
}
- /* 1 <= shCount <= 7 */
- else
- shiftR2Left2Result(left, LSB, result, LSB, shCount, sign);
+ /* 1 <= shCount <= 7 */
+ else
+ shiftR2Left2Result (left, LSB, result, LSB, shCount, sign);
}
/*-----------------------------------------------------------------*/
/* shiftRLong - shift right one long from left to result */
/* offl = LSB or MSB16 */
/*-----------------------------------------------------------------*/
-static void shiftRLong (operand *left, int offl,
- operand *result, int sign)
+static void
+shiftRLong (operand * left, int offl,
+ operand * result, int sign)
{
- if(!sign)
- emitcode("clr","c");
- MOVA(aopGet(AOP(left),MSB32,FALSE,FALSE));
- if(sign)
- emitcode("mov","c,acc.7");
- emitcode("rrc","a");
- aopPut(AOP(result),"a",MSB32-offl);
- if(offl == MSB16)
- /* add sign of "a" */
- addSign(result, MSB32, sign);
+ int isSameRegs=sameRegs(AOP(left),AOP(result));
- MOVA(aopGet(AOP(left),MSB24,FALSE,FALSE));
- emitcode("rrc","a");
- aopPut(AOP(result),"a",MSB24-offl);
+ if (isSameRegs && offl>1) {
+ // we are in big trouble, but this shouldn't happen
+ werror(E_INTERNAL_ERROR, __FILE__, __LINE__);
+ }
- MOVA(aopGet(AOP(left),MSB16,FALSE,FALSE));
- emitcode("rrc","a");
- aopPut(AOP(result),"a",MSB16-offl);
-
- if(offl == LSB){
- MOVA(aopGet(AOP(left),LSB,FALSE,FALSE));
- emitcode("rrc","a");
- aopPut(AOP(result),"a",LSB);
+ MOVA (aopGet (AOP (left), MSB32, FALSE, FALSE));
+
+ if (offl==MSB16) {
+ // shift is > 8
+ if (sign) {
+ emitcode ("rlc", "a");
+ emitcode ("subb", "a,acc");
+ if (isSameRegs)
+ emitcode ("xch", "a,%s", aopGet(AOP(left), MSB32, FALSE, FALSE));
+ else {
+ aopPut (AOP (result), "a", MSB32, isOperandVolatile (result, FALSE));
+ MOVA (aopGet (AOP (left), MSB32, FALSE, FALSE));
+ }
+ } else {
+ aopPut (AOP(result), zero, MSB32, isOperandVolatile (result, FALSE));
+ }
+ }
+
+ if (!sign) {
+ emitcode ("clr", "c");
+ } else {
+ emitcode ("mov", "c,acc.7");
+ }
+
+ emitcode ("rrc", "a");
+
+ if (isSameRegs && offl==MSB16) {
+ emitcode ("xch", "a,%s",aopGet (AOP (left), MSB24, FALSE, FALSE));
+ } else {
+ aopPut (AOP (result), "a", MSB32-offl, isOperandVolatile (result, FALSE));
+ MOVA (aopGet (AOP (left), MSB24, FALSE, FALSE));
+ }
+
+ emitcode ("rrc", "a");
+ if (isSameRegs && offl==1) {
+ emitcode ("xch", "a,%s",aopGet (AOP (left), MSB16, FALSE, FALSE));
+ } else {
+ aopPut (AOP (result), "a", MSB24-offl, isOperandVolatile (result, FALSE));
+ MOVA (aopGet (AOP (left), MSB16, FALSE, FALSE));
+ }
+ emitcode ("rrc", "a");
+ aopPut (AOP (result), "a", MSB16 - offl, isOperandVolatile (result, FALSE));
+
+ if (offl == LSB)
+ {
+ MOVA (aopGet (AOP (left), LSB, FALSE, FALSE));
+ emitcode ("rrc", "a");
+ aopPut (AOP (result), "a", LSB, isOperandVolatile (result, FALSE));
}
}
/*-----------------------------------------------------------------*/
/* genrshFour - shift four byte by a known amount != 0 */
/*-----------------------------------------------------------------*/
-static void genrshFour (operand *result, operand *left,
- int shCount, int sign)
-{
- /* if shifting more that 3 bytes */
- if(shCount >= 24 ) {
- shCount -= 24;
- if(shCount)
- shiftR1Left2Result(left, MSB32, result, LSB, shCount, sign);
- else
- movLeft2Result(left, MSB32, result, LSB, sign);
- addSign(result, MSB16, sign);
- }
- else if(shCount >= 16){
- shCount -= 16;
- if(shCount)
- shiftR2Left2Result(left, MSB24, result, LSB, shCount, sign);
- else{
- movLeft2Result(left, MSB24, result, LSB, 0);
- movLeft2Result(left, MSB32, result, MSB16, sign);
- }
- addSign(result, MSB24, sign);
- }
- else if(shCount >= 8){
- shCount -= 8;
- if(shCount == 1)
- shiftRLong(left, MSB16, result, sign);
- else if(shCount == 0){
- movLeft2Result(left, MSB16, result, LSB, 0);
- movLeft2Result(left, MSB24, result, MSB16, 0);
- movLeft2Result(left, MSB32, result, MSB24, sign);
- addSign(result, MSB32, sign);
- }
- else{
- shiftR2Left2Result(left, MSB16, result, LSB, shCount, 0);
- shiftLLeftOrResult(left, MSB32, result, MSB16, 8 - shCount);
- /* the last shift is signed */
- shiftR1Left2Result(left, MSB32, result, MSB24, shCount, sign);
- addSign(result, MSB32, sign);
- }
+static void
+genrshFour (operand * result, operand * left,
+ int shCount, int sign)
+{
+ D(emitcode ("; genrshFour",""));
+
+ /* if shifting more that 3 bytes */
+ if (shCount >= 24)
+ {
+ shCount -= 24;
+ if (shCount)
+ shiftR1Left2Result (left, MSB32, result, LSB, shCount, sign);
+ else
+ movLeft2Result (left, MSB32, result, LSB, sign);
+ addSign (result, MSB16, sign);
+ }
+ else if (shCount >= 16)
+ {
+ shCount -= 16;
+ if (shCount)
+ shiftR2Left2Result (left, MSB24, result, LSB, shCount, sign);
+ else
+ {
+ movLeft2Result (left, MSB24, result, LSB, 0);
+ movLeft2Result (left, MSB32, result, MSB16, sign);
+ }
+ addSign (result, MSB24, sign);
}
- else{ /* 1 <= shCount <= 7 */
- if(shCount <= 2){
- shiftRLong(left, LSB, result, sign);
- if(shCount == 2)
- shiftRLong(result, LSB, result, sign);
- }
- else{
- shiftR2Left2Result(left, LSB, result, LSB, shCount, 0);
- shiftLLeftOrResult(left, MSB24, result, MSB16, 8 - shCount);
- shiftR2Left2Result(left, MSB24, result, MSB24, shCount, sign);
- }
+ else if (shCount >= 8)
+ {
+ shCount -= 8;
+ if (shCount == 1)
+ shiftRLong (left, MSB16, result, sign);
+ else if (shCount == 0)
+ {
+ movLeft2Result (left, MSB16, result, LSB, 0);
+ movLeft2Result (left, MSB24, result, MSB16, 0);
+ movLeft2Result (left, MSB32, result, MSB24, sign);
+ addSign (result, MSB32, sign);
+ }
+ else
+ {
+ shiftR2Left2Result (left, MSB16, result, LSB, shCount, 0);
+ shiftLLeftOrResult (left, MSB32, result, MSB16, 8 - shCount);
+ /* the last shift is signed */
+ shiftR1Left2Result (left, MSB32, result, MSB24, shCount, sign);
+ addSign (result, MSB32, sign);
+ }
+ }
+ else
+ { /* 1 <= shCount <= 7 */
+ if (shCount <= 2)
+ {
+ shiftRLong (left, LSB, result, sign);
+ if (shCount == 2)
+ shiftRLong (result, LSB, result, sign);
+ }
+ else
+ {
+ shiftR2Left2Result (left, LSB, result, LSB, shCount, 0);
+ shiftLLeftOrResult (left, MSB24, result, MSB16, 8 - shCount);
+ shiftR2Left2Result (left, MSB24, result, MSB24, shCount, sign);
+ }
}
}
/*-----------------------------------------------------------------*/
/* genRightShiftLiteral - right shifting by known count */
/*-----------------------------------------------------------------*/
-static void genRightShiftLiteral (operand *left,
- operand *right,
- operand *result,
- iCode *ic,
- int sign)
-{
- int shCount = (int) floatFromVal (AOP(right)->aopu.aop_lit);
- int size;
+static void
+genRightShiftLiteral (operand * left,
+ operand * right,
+ operand * result,
+ iCode * ic,
+ int sign)
+{
+ int shCount = (int) floatFromVal (AOP (right)->aopu.aop_lit);
+ int size;
- freeAsmop(right,NULL,ic,TRUE);
+ D(emitcode ("; genRightShiftLiteral",""));
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
+ freeAsmop (right, NULL, ic, TRUE);
+
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
#if VIEW_SIZE
- emitcode("; shift right ","result %d, left %d",AOP_SIZE(result),
- AOP_SIZE(left));
+ emitcode ("; shift right ", "result %d, left %d", AOP_SIZE (result),
+ AOP_SIZE (left));
#endif
- size = getDataSize(left);
- /* test the LEFT size !!! */
-
- /* I suppose that the left size >= result size */
- if(shCount == 0){
- size = getDataSize(result);
- while(size--)
- movLeft2Result(left, size, result, size, 0);
- }
-
- else if(shCount >= (size * 8)){
- if(sign)
- /* get sign in acc.7 */
- MOVA(aopGet(AOP(left),size-1,FALSE,FALSE));
- addSign(result, LSB, sign);
- } else{
- switch (size) {
- case 1:
- genrshOne (result,left,shCount,sign);
- break;
-
- case 2:
- genrshTwo (result,left,shCount,sign);
- break;
-
- case 4:
- genrshFour (result,left,shCount,sign);
- break;
- default :
- break;
- }
+ size = getDataSize (left);
+ /* test the LEFT size !!! */
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ /* I suppose that the left size >= result size */
+ if (shCount == 0)
+ {
+ size = getDataSize (result);
+ while (size--)
+ movLeft2Result (left, size, result, size, 0);
+ }
+
+ else if (shCount >= (size * 8))
+ {
+ if (sign) {
+ /* get sign in acc.7 */
+ MOVA (aopGet (AOP (left), size - 1, FALSE, FALSE));
+ }
+ addSign (result, LSB, sign);
+ }
+ else
+ {
+ switch (size)
+ {
+ case 1:
+ genrshOne (result, left, shCount, sign);
+ break;
+
+ case 2:
+ genrshTwo (result, left, shCount, sign);
+ break;
+
+ case 4:
+ genrshFour (result, left, shCount, sign);
+ break;
+ default:
+ break;
+ }
}
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genSignedRightShift - right shift of signed number */
/*-----------------------------------------------------------------*/
-static void genSignedRightShift (iCode *ic)
+static void
+genSignedRightShift (iCode * ic)
{
- operand *right, *left, *result;
- int size, offset;
- char *l;
- symbol *tlbl, *tlbl1 ;
+ operand *right, *left, *result;
+ int size, offset;
+ char *l;
+ symbol *tlbl, *tlbl1;
- /* we do it the hard way put the shift count in b
- and loop thru preserving the sign */
+ D(emitcode ("; genSignedRightShift",""));
- right = IC_RIGHT(ic);
- left = IC_LEFT(ic);
- result = IC_RESULT(ic);
+ /* we do it the hard way put the shift count in b
+ and loop thru preserving the sign */
- aopOp(right,ic,FALSE);
+ right = IC_RIGHT (ic);
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+ aopOp (right, ic, FALSE);
- if ( AOP_TYPE(right) == AOP_LIT) {
- genRightShiftLiteral (left,right,result,ic,1);
- return ;
- }
- /* shift count is unknown then we have to form
- a loop get the loop count in B : Note: we take
- only the lower order byte since shifting
- more that 32 bits make no sense anyway, ( the
- largest size of an object can be only 32 bits ) */
-
- emitcode("mov","b,%s",aopGet(AOP(right),0,FALSE,FALSE));
- emitcode("inc","b");
- freeAsmop (right,NULL,ic,TRUE);
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
- /* now move the left to the result if they are not the
- same */
- if (!sameRegs(AOP(left),AOP(result)) &&
- AOP_SIZE(result) > 1) {
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ genRightShiftLiteral (left, right, result, ic, 1);
+ return;
+ }
+ /* shift count is unknown then we have to form
+ a loop get the loop count in B : Note: we take
+ only the lower order byte since shifting
+ more that 32 bits make no sense anyway, ( the
+ largest size of an object can be only 32 bits ) */
+
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ emitcode ("inc", "b");
+ freeAsmop (right, NULL, ic, TRUE);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* now move the left to the result if they are not the
+ same */
+ if (!sameRegs (AOP (left), AOP (result)) &&
+ AOP_SIZE (result) > 1)
+ {
- size = AOP_SIZE(result);
- offset=0;
- while (size--) {
- l = aopGet(AOP(left),offset,FALSE,TRUE);
- if (*l == '@' && IS_AOP_PREG(result)) {
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--)
+ {
+ l = aopGet (AOP (left), offset, FALSE, TRUE);
+ if (*l == '@' && IS_AOP_PREG (result))
+ {
- emitcode("mov","a,%s",l);
- aopPut(AOP(result),"a",offset);
- } else
- aopPut(AOP(result),l,offset);
- offset++;
- }
+ emitcode ("mov", "a,%s", l);
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ aopPut (AOP (result), l, offset, isOperandVolatile (result, FALSE));
+ offset++;
+ }
}
- /* mov the highest order bit to OVR */
- tlbl = newiTempLabel(NULL);
- tlbl1= newiTempLabel(NULL);
-
- size = AOP_SIZE(result);
- offset = size - 1;
- emitcode("mov","a,%s",aopGet(AOP(left),offset,FALSE,FALSE));
- emitcode("rlc","a");
- emitcode("mov","ov,c");
- /* if it is only one byte then */
- if (size == 1) {
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- emitcode("mov","c,ov");
- emitcode("rrc","a");
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
- aopPut(AOP(result),"a",0);
- goto release ;
- }
-
- reAdjustPreg(AOP(result));
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- emitcode("mov","c,ov");
- while (size--) {
- l = aopGet(AOP(result),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("rrc","a");
- aopPut(AOP(result),"a",offset--);
- }
- reAdjustPreg(AOP(result));
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
+ /* mov the highest order bit to OVR */
+ tlbl = newiTempLabel (NULL);
+ tlbl1 = newiTempLabel (NULL);
+
+ size = AOP_SIZE (result);
+ offset = size - 1;
+ emitcode ("mov", "a,%s", aopGet (AOP (left), offset, FALSE, FALSE));
+ emitcode ("rlc", "a");
+ emitcode ("mov", "ov,c");
+ /* if it is only one byte then */
+ if (size == 1)
+ {
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("sjmp", "%05d$", tlbl1->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ emitcode ("mov", "c,ov");
+ emitcode ("rrc", "a");
+ emitcode ("", "%05d$:", tlbl1->key + 100);
+ emitcode ("djnz", "b,%05d$", tlbl->key + 100);
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
+
+ reAdjustPreg (AOP (result));
+ emitcode ("sjmp", "%05d$", tlbl1->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ emitcode ("mov", "c,ov");
+ while (size--)
+ {
+ l = aopGet (AOP (result), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rrc", "a");
+ aopPut (AOP (result), "a", offset--, isOperandVolatile (result, FALSE));
+ }
+ reAdjustPreg (AOP (result));
+ emitcode ("", "%05d$:", tlbl1->key + 100);
+ emitcode ("djnz", "b,%05d$", tlbl->key + 100);
release:
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genRightShift - generate code for right shifting */
/*-----------------------------------------------------------------*/
-static void genRightShift (iCode *ic)
-{
- operand *right, *left, *result;
- link *retype ;
- int size, offset;
- char *l;
- symbol *tlbl, *tlbl1 ;
-
- /* if signed then we do it the hard way preserve the
- sign bit moving it inwards */
- retype = getSpec(operandType(IC_RESULT(ic)));
-
- if (!SPEC_USIGN(retype)) {
- genSignedRightShift (ic);
- return ;
- }
-
- /* signed & unsigned types are treated the same : i.e. the
- signed is NOT propagated inwards : quoting from the
- ANSI - standard : "for E1 >> E2, is equivalent to division
- by 2**E2 if unsigned or if it has a non-negative value,
- otherwise the result is implementation defined ", MY definition
- is that the sign does not get propagated */
-
- right = IC_RIGHT(ic);
- left = IC_LEFT(ic);
- result = IC_RESULT(ic);
-
- aopOp(right,ic,FALSE);
-
- /* if the shift count is known then do it
- as efficiently as possible */
- if (AOP_TYPE(right) == AOP_LIT) {
- genRightShiftLiteral (left,right,result,ic, 0);
- return ;
- }
-
- /* shift count is unknown then we have to form
- a loop get the loop count in B : Note: we take
- only the lower order byte since shifting
- more that 32 bits make no sense anyway, ( the
- largest size of an object can be only 32 bits ) */
-
- emitcode("mov","b,%s",aopGet(AOP(right),0,FALSE,FALSE));
- emitcode("inc","b");
- freeAsmop (right,NULL,ic,TRUE);
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
-
- /* now move the left to the result if they are not the
- same */
- if (!sameRegs(AOP(left),AOP(result)) &&
- AOP_SIZE(result) > 1) {
-
- size = AOP_SIZE(result);
- offset=0;
- while (size--) {
- l = aopGet(AOP(left),offset,FALSE,TRUE);
- if (*l == '@' && IS_AOP_PREG(result)) {
-
- emitcode("mov","a,%s",l);
- aopPut(AOP(result),"a",offset);
- } else
- aopPut(AOP(result),l,offset);
- offset++;
- }
+static void
+genRightShift (iCode * ic)
+{
+ operand *right, *left, *result;
+ sym_link *letype;
+ int size, offset;
+ char *l;
+ symbol *tlbl, *tlbl1;
+
+ D(emitcode ("; genRightShift",""));
+
+ /* if signed then we do it the hard way preserve the
+ sign bit moving it inwards */
+ letype = getSpec (operandType (IC_LEFT (ic)));
+
+ if (!SPEC_USIGN (letype))
+ {
+ genSignedRightShift (ic);
+ return;
+ }
+
+ /* signed & unsigned types are treated the same : i.e. the
+ signed is NOT propagated inwards : quoting from the
+ ANSI - standard : "for E1 >> E2, is equivalent to division
+ by 2**E2 if unsigned or if it has a non-negative value,
+ otherwise the result is implementation defined ", MY definition
+ is that the sign does not get propagated */
+
+ right = IC_RIGHT (ic);
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+
+ aopOp (right, ic, FALSE);
+
+ /* if the shift count is known then do it
+ as efficiently as possible */
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ genRightShiftLiteral (left, right, result, ic, 0);
+ return;
+ }
+
+ /* shift count is unknown then we have to form
+ a loop get the loop count in B : Note: we take
+ only the lower order byte since shifting
+ more that 32 bits make no sense anyway, ( the
+ largest size of an object can be only 32 bits ) */
+
+ emitcode ("mov", "b,%s", aopGet (AOP (right), 0, FALSE, FALSE));
+ emitcode ("inc", "b");
+ freeAsmop (right, NULL, ic, TRUE);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* now move the left to the result if they are not the
+ same */
+ if (!sameRegs (AOP (left), AOP (result)) &&
+ AOP_SIZE (result) > 1)
+ {
+
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--)
+ {
+ l = aopGet (AOP (left), offset, FALSE, TRUE);
+ if (*l == '@' && IS_AOP_PREG (result))
+ {
+
+ emitcode ("mov", "a,%s", l);
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+ }
+ else
+ aopPut (AOP (result), l, offset, isOperandVolatile (result, FALSE));
+ offset++;
+ }
+ }
+
+ tlbl = newiTempLabel (NULL);
+ tlbl1 = newiTempLabel (NULL);
+ size = AOP_SIZE (result);
+ offset = size - 1;
+
+ /* if it is only one byte then */
+ if (size == 1)
+ {
+ l = aopGet (AOP (left), 0, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("sjmp", "%05d$", tlbl1->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ CLRC;
+ emitcode ("rrc", "a");
+ emitcode ("", "%05d$:", tlbl1->key + 100);
+ emitcode ("djnz", "b,%05d$", tlbl->key + 100);
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
+
+ reAdjustPreg (AOP (result));
+ emitcode ("sjmp", "%05d$", tlbl1->key + 100);
+ emitcode ("", "%05d$:", tlbl->key + 100);
+ CLRC;
+ while (size--)
+ {
+ l = aopGet (AOP (result), offset, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rrc", "a");
+ aopPut (AOP (result), "a", offset--, isOperandVolatile (result, FALSE));
}
+ reAdjustPreg (AOP (result));
- tlbl = newiTempLabel(NULL);
- tlbl1= newiTempLabel(NULL);
- size = AOP_SIZE(result);
- offset = size - 1;
-
- /* if it is only one byte then */
- if (size == 1) {
- l = aopGet(AOP(left),0,FALSE,FALSE);
- MOVA(l);
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- CLRC;
- emitcode("rrc","a");
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
- aopPut(AOP(result),"a",0);
- goto release ;
- }
-
- reAdjustPreg(AOP(result));
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- CLRC;
- while (size--) {
- l = aopGet(AOP(result),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("rrc","a");
- aopPut(AOP(result),"a",offset--);
- }
- reAdjustPreg(AOP(result));
-
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
+ emitcode ("", "%05d$:", tlbl1->key + 100);
+ emitcode ("djnz", "b,%05d$", tlbl->key + 100);
release:
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genUnpackBits - generates code for unpacking bits */
+/* emitPtrByteGet - emits code to get a byte into A through a */
+/* pointer register (R0, R1, or DPTR). The */
+/* original value of A can be preserved in B. */
/*-----------------------------------------------------------------*/
-static void genUnpackBits (operand *result, char *rname, int ptype)
-{
- int shCnt ;
- int rlen = 0 ;
- link *etype;
- int offset = 0 ;
-
- etype = getSpec(operandType(result));
-
- /* read the first byte */
- switch (ptype) {
-
- case POINTER:
+static void
+emitPtrByteGet (char *rname, int p_type, bool preserveAinB)
+{
+ switch (p_type)
+ {
case IPOINTER:
- emitcode("mov","a,@%s",rname);
- break;
-
+ case POINTER:
+ if (preserveAinB)
+ emitcode ("mov", "b,a");
+ emitcode ("mov", "a,@%s", rname);
+ break;
+
case PPOINTER:
- emitcode("movx","a,@%s",rname);
- break;
-
+ if (preserveAinB)
+ emitcode ("mov", "b,a");
+ emitcode ("movx", "a,@%s", rname);
+ break;
+
case FPOINTER:
- emitcode("movx","a,@dptr");
- break;
+ if (preserveAinB)
+ emitcode ("mov", "b,a");
+ emitcode ("movx", "a,@dptr");
+ break;
case CPOINTER:
- emitcode("clr","a");
- emitcode("movc","a","@a+dptr");
- break;
+ if (preserveAinB)
+ emitcode ("mov", "b,a");
+ emitcode ("clr", "a");
+ emitcode ("movc", "a,@a+dptr");
+ break;
case GPOINTER:
- emitcode("lcall","__gptrget");
- break;
+ if (preserveAinB)
+ {
+ emitcode ("push", "b");
+ emitcode ("push", "acc");
+ }
+ emitcode ("lcall", "__gptrget");
+ if (preserveAinB)
+ emitcode ("pop", "b");
+ break;
}
+}
- /* if we have bitdisplacement then it fits */
- /* into this byte completely or if length is */
- /* less than a byte */
- if ((shCnt = SPEC_BSTR(etype)) ||
- (SPEC_BLEN(etype) <= 8)) {
+/*-----------------------------------------------------------------*/
+/* emitPtrByteSet - emits code to set a byte from src through a */
+/* pointer register (R0, R1, or DPTR). */
+/*-----------------------------------------------------------------*/
+static void
+emitPtrByteSet (char *rname, int p_type, char *src)
+{
+ switch (p_type)
+ {
+ case IPOINTER:
+ case POINTER:
+ if (*src=='@')
+ {
+ MOVA (src);
+ emitcode ("mov", "@%s,a", rname);
+ }
+ else
+ emitcode ("mov", "@%s,%s", rname, src);
+ break;
- /* shift right acc */
- AccRsh(shCnt);
+ case PPOINTER:
+ MOVA (src);
+ emitcode ("movx", "@%s,a", rname);
+ break;
+
+ case FPOINTER:
+ MOVA (src);
+ emitcode ("movx", "@dptr,a");
+ break;
- emitcode("anl","a,#0x%02x",
- ((unsigned char) -1)>>(8 - SPEC_BLEN(etype)));
- aopPut(AOP(result),"a",offset);
- return ;
+ case GPOINTER:
+ MOVA (src);
+ emitcode ("lcall", "__gptrput");
+ break;
}
+}
- /* bit field did not fit in a byte */
- rlen = SPEC_BLEN(etype) - 8;
- aopPut(AOP(result),"a",offset++);
+/*-----------------------------------------------------------------*/
+/* genUnpackBits - generates code for unpacking bits */
+/*-----------------------------------------------------------------*/
+static void
+genUnpackBits (operand * result, char *rname, int ptype)
+{
+ int offset = 0; /* result byte offset */
+ int rsize; /* result size */
+ int rlen = 0; /* remaining bitfield length */
+ sym_link *etype; /* bitfield type information */
+ int blen; /* bitfield length */
+ int bstr; /* bitfield starting bit within byte */
+
+ D(emitcode ("; genUnpackBits",""));
+
+ etype = getSpec (operandType (result));
+ rsize = getSize (operandType (result));
+ blen = SPEC_BLEN (etype);
+ bstr = SPEC_BSTR (etype);
+
+ /* If the bitfield length is less than a byte */
+ if (blen < 8)
+ {
+ emitPtrByteGet (rname, ptype, FALSE);
+ AccRsh (bstr);
+ emitcode ("anl", "a,#0x%02x", ((unsigned char) -1) >> (8 - blen));
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ goto finish;
+ }
- while (1) {
+ /* Bit field did not fit in a byte. Copy all
+ but the partial byte at the end. */
+ for (rlen=blen;rlen>=8;rlen-=8)
+ {
+ emitPtrByteGet (rname, ptype, FALSE);
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ if (rlen>8)
+ emitcode ("inc", "%s", rname);
+ }
- switch (ptype) {
- case POINTER:
- case IPOINTER:
- emitcode("inc","%s",rname);
- emitcode("mov","a,@%s",rname);
- break;
-
- case PPOINTER:
- emitcode("inc","%s",rname);
- emitcode("movx","a,@%s",rname);
- break;
-
- case FPOINTER:
- emitcode("inc","dptr");
- emitcode("movx","a,@dptr");
- break;
-
- case CPOINTER:
- emitcode("clr","a");
- emitcode("inc","dptr");
- emitcode("movc","a","@a+dptr");
- break;
-
- case GPOINTER:
- emitcode("inc","dptr");
- emitcode("lcall","__gptrget");
- break;
- }
-
- rlen -= 8;
- /* if we are done */
- if ( rlen <= 0 )
- break ;
-
- aopPut(AOP(result),"a",offset++);
-
+ /* Handle the partial byte at the end */
+ if (rlen)
+ {
+ emitPtrByteGet (rname, ptype, FALSE);
+ emitcode ("anl", "a,#0x%02x", ((unsigned char) -1) >> (8-rlen));
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
}
-
- if (rlen) {
- emitcode("anl","a,#0x%02x",((unsigned char)-1)>>(-rlen));
- aopPut(AOP(result),"a",offset);
+
+finish:
+ if (offset < rsize)
+ {
+ rsize -= offset;
+ while (rsize--)
+ aopPut (AOP (result), zero, offset++, isOperandVolatile (result, FALSE));
}
-
- return ;
}
/*-----------------------------------------------------------------*/
/* genDataPointerGet - generates code when ptr offset is known */
/*-----------------------------------------------------------------*/
-static void genDataPointerGet (operand *left,
- operand *result,
- iCode *ic)
-{
- char *l;
- char buffer[256];
- int size , offset = 0;
- aopOp(result,ic,TRUE);
-
- /* get the string representation of the name */
- l = aopGet(AOP(left),0,FALSE,TRUE);
- size = AOP_SIZE(result);
- while (size--) {
- if (offset)
- sprintf(buffer,"(%s + %d)",l+1,offset);
- else
- sprintf(buffer,"%s",l+1);
- aopPut(AOP(result),buffer,offset++);
+static void
+genDataPointerGet (operand * left,
+ operand * result,
+ iCode * ic)
+{
+ char *l;
+ char buffer[256];
+ int size, offset = 0;
+
+ D(emitcode ("; genDataPointerGet",""));
+
+ aopOp (result, ic, TRUE);
+
+ /* get the string representation of the name */
+ l = aopGet (AOP (left), 0, FALSE, TRUE);
+ size = AOP_SIZE (result);
+ while (size--)
+ {
+ if (offset)
+ sprintf (buffer, "(%s + %d)", l + 1, offset);
+ else
+ sprintf (buffer, "%s", l + 1);
+ aopPut (AOP (result), buffer, offset++, isOperandVolatile (result, FALSE));
}
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
-/*-----------------------------------------------------------------*/
-/* genNearPointerGet - emitcode for near pointer fetch */
-/*-----------------------------------------------------------------*/
-static void genNearPointerGet (operand *left,
- operand *result,
- iCode *ic)
-{
- asmop *aop = NULL;
- regs *preg = NULL ;
- char *rname ;
- link *rtype, *retype;
- link *ltype = operandType(left);
- char buffer[80];
+/*-----------------------------------------------------------------*/
+/* genNearPointerGet - emitcode for near pointer fetch */
+/*-----------------------------------------------------------------*/
+static void
+genNearPointerGet (operand * left,
+ operand * result,
+ iCode * ic,
+ iCode * pi)
+{
+ asmop *aop = NULL;
+ regs *preg = NULL;
+ char *rname;
+ sym_link *rtype, *retype;
+ sym_link *ltype = operandType (left);
+ char buffer[80];
+
+ D(emitcode ("; genNearPointerGet",""));
+
+ rtype = operandType (result);
+ retype = getSpec (rtype);
+
+ aopOp (left, ic, FALSE);
+
+ /* if left is rematerialisable and
+ result is not bit variable type and
+ the left is pointer to data space i.e
+ lower 128 bytes of space */
+ if (AOP_TYPE (left) == AOP_IMMD &&
+ !IS_BITVAR (retype) &&
+ DCL_TYPE (ltype) == POINTER)
+ {
+ genDataPointerGet (left, result, ic);
+ return;
+ }
+
+ /* if the value is already in a pointer register
+ then don't need anything more */
+ if (!AOP_INPREG (AOP (left)))
+ {
+ if (IS_AOP_PREG (left))
+ {
+ // Aha, it is a pointer, just in disguise.
+ rname = aopGet (AOP (left), 0, FALSE, FALSE);
+ if (*rname != '@')
+ {
+ fprintf(stderr, "probable internal error: unexpected rname @ %s:%d\n",
+ __FILE__, __LINE__);
+ }
+ else
+ {
+ // Expected case.
+ emitcode ("mov", "a%s,%s", rname + 1, rname);
+ rname++; // skip the '@'.
+ }
+ }
+ else
+ {
+ /* otherwise get a free pointer register */
+ aop = newAsmop (0);
+ preg = getFreePtr (ic, &aop, FALSE);
+ emitcode ("mov", "%s,%s",
+ preg->name,
+ aopGet (AOP (left), 0, FALSE, TRUE));
+ rname = preg->name;
+ }
+ }
+ else
+ rname = aopGet (AOP (left), 0, FALSE, FALSE);
+
+ //aopOp (result, ic, FALSE);
+ aopOp (result, ic, result?TRUE:FALSE);
+
+ /* if bitfield then unpack the bits */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, rname, POINTER);
+ else
+ {
+ /* we have can just get the values */
+ int size = AOP_SIZE (result);
+ int offset = 0;
+
+ while (size--)
+ {
+ if (IS_AOP_PREG (result) || AOP_TYPE (result) == AOP_STK)
+ {
- rtype = operandType(result);
- retype= getSpec(rtype);
-
- aopOp(left,ic,FALSE);
-
- /* if left is rematerialisable and
- result is not bit variable type and
- the left is pointer to data space i.e
- lower 128 bytes of space */
- if (AOP_TYPE(left) == AOP_IMMD &&
- !IS_BITVAR(retype) &&
- DCL_TYPE(ltype) == POINTER) {
- genDataPointerGet (left,result,ic);
- return ;
- }
-
- /* if the value is already in a pointer register
- then don't need anything more */
- if (!AOP_INPREG(AOP(left))) {
- /* otherwise get a free pointer register */
- aop = newAsmop(0);
- preg = getFreePtr(ic,&aop,FALSE);
- emitcode("mov","%s,%s",
- preg->name,
- aopGet(AOP(left),0,FALSE,TRUE));
- rname = preg->name ;
- } else
- rname = aopGet(AOP(left),0,FALSE,FALSE);
-
- freeAsmop(left,NULL,ic,TRUE);
- aopOp (result,ic,FALSE);
-
- /* if bitfield then unpack the bits */
- if (IS_BITVAR(retype))
- genUnpackBits (result,rname,POINTER);
- else {
- /* we have can just get the values */
- int size = AOP_SIZE(result);
- int offset = 0 ;
-
- while (size--) {
- if (IS_AOP_PREG(result) || AOP_TYPE(result) == AOP_STK ) {
-
- emitcode("mov","a,@%s",rname);
- aopPut(AOP(result),"a",offset);
- } else {
- sprintf(buffer,"@%s",rname);
- aopPut(AOP(result),buffer,offset);
+ emitcode ("mov", "a,@%s", rname);
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
}
- offset++ ;
- if (size)
- emitcode("inc","%s",rname);
+ else
+ {
+ sprintf (buffer, "@%s", rname);
+ aopPut (AOP (result), buffer, offset, isOperandVolatile (result, FALSE));
+ }
+ offset++;
+ if (size || pi)
+ emitcode ("inc", "%s", rname);
}
}
- /* now some housekeeping stuff */
- if (aop) {
- /* we had to allocate for this iCode */
- freeAsmop(NULL,aop,ic,TRUE);
- } else {
- /* we did not allocate which means left
- already in a pointer register, then
- if size > 0 && this could be used again
- we have to point it back to where it
- belongs */
- if (AOP_SIZE(result) > 1 &&
- !OP_SYMBOL(left)->remat &&
- ( OP_SYMBOL(left)->liveTo > ic->seq ||
- ic->depth )) {
- int size = AOP_SIZE(result) - 1;
- while (size--)
- emitcode("dec","%s",rname);
+ /* now some housekeeping stuff */
+ if (aop) /* we had to allocate for this iCode */
+ {
+ if (pi) { /* post increment present */
+ aopPut(AOP ( left ),rname,0, isOperandVolatile (left, FALSE));
+ }
+ freeAsmop (NULL, aop, ic, RESULTONSTACK (ic) ? FALSE : TRUE);
+ }
+ else
+ {
+ /* we did not allocate which means left
+ already in a pointer register, then
+ if size > 0 && this could be used again
+ we have to point it back to where it
+ belongs */
+ if ((AOP_SIZE (result) > 1 &&
+ !OP_SYMBOL (left)->remat &&
+ (OP_SYMBOL (left)->liveTo > ic->seq ||
+ ic->depth)) &&
+ !pi)
+ {
+ int size = AOP_SIZE (result) - 1;
+ while (size--)
+ emitcode ("dec", "%s", rname);
}
}
- /* done */
- freeAsmop(result,NULL,ic,TRUE);
-
+ /* done */
+ freeAsmop (result, NULL, ic, RESULTONSTACK (ic) ? FALSE : TRUE);
+ freeAsmop (left, NULL, ic, TRUE);
+ if (pi) pi->generated = 1;
}
/*-----------------------------------------------------------------*/
/* genPagedPointerGet - emitcode for paged pointer fetch */
/*-----------------------------------------------------------------*/
-static void genPagedPointerGet (operand *left,
- operand *result,
- iCode *ic)
+static void
+genPagedPointerGet (operand * left,
+ operand * result,
+ iCode * ic,
+ iCode *pi)
{
- asmop *aop = NULL;
- regs *preg = NULL ;
- char *rname ;
- link *rtype, *retype;
+ asmop *aop = NULL;
+ regs *preg = NULL;
+ char *rname;
+ sym_link *rtype, *retype;
- rtype = operandType(result);
- retype= getSpec(rtype);
-
- aopOp(left,ic,FALSE);
+ D(emitcode ("; genPagedPointerGet",""));
+
+ rtype = operandType (result);
+ retype = getSpec (rtype);
+
+ aopOp (left, ic, FALSE);
/* if the value is already in a pointer register
- then don't need anything more */
- if (!AOP_INPREG(AOP(left))) {
- /* otherwise get a free pointer register */
- aop = newAsmop(0);
- preg = getFreePtr(ic,&aop,FALSE);
- emitcode("mov","%s,%s",
+ then don't need anything more */
+ if (!AOP_INPREG (AOP (left)))
+ {
+ /* otherwise get a free pointer register */
+ aop = newAsmop (0);
+ preg = getFreePtr (ic, &aop, FALSE);
+ emitcode ("mov", "%s,%s",
preg->name,
- aopGet(AOP(left),0,FALSE,TRUE));
- rname = preg->name ;
- } else
- rname = aopGet(AOP(left),0,FALSE,FALSE);
-
- freeAsmop(left,NULL,ic,TRUE);
- aopOp (result,ic,FALSE);
-
- /* if bitfield then unpack the bits */
- if (IS_BITVAR(retype))
- genUnpackBits (result,rname,PPOINTER);
- else {
- /* we have can just get the values */
- int size = AOP_SIZE(result);
- int offset = 0 ;
-
- while (size--) {
-
- emitcode("movx","a,@%s",rname);
- aopPut(AOP(result),"a",offset);
-
- offset++ ;
-
- if (size)
- emitcode("inc","%s",rname);
+ aopGet (AOP (left), 0, FALSE, TRUE));
+ rname = preg->name;
+ }
+ else
+ rname = aopGet (AOP (left), 0, FALSE, FALSE);
+
+ aopOp (result, ic, FALSE);
+
+ /* if bitfield then unpack the bits */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, rname, PPOINTER);
+ else
+ {
+ /* we have can just get the values */
+ int size = AOP_SIZE (result);
+ int offset = 0;
+
+ while (size--)
+ {
+
+ emitcode ("movx", "a,@%s", rname);
+ aopPut (AOP (result), "a", offset, isOperandVolatile (result, FALSE));
+
+ offset++;
+
+ if (size || pi)
+ emitcode ("inc", "%s", rname);
}
}
- /* now some housekeeping stuff */
- if (aop) {
- /* we had to allocate for this iCode */
- freeAsmop(NULL,aop,ic,TRUE);
- } else {
- /* we did not allocate which means left
- already in a pointer register, then
- if size > 0 && this could be used again
- we have to point it back to where it
- belongs */
- if (AOP_SIZE(result) > 1 &&
- !OP_SYMBOL(left)->remat &&
- ( OP_SYMBOL(left)->liveTo > ic->seq ||
- ic->depth )) {
- int size = AOP_SIZE(result) - 1;
- while (size--)
- emitcode("dec","%s",rname);
+ /* now some housekeeping stuff */
+ if (aop) /* we had to allocate for this iCode */
+ {
+ if (pi) aopPut ( AOP (left), rname, 0, isOperandVolatile (left, FALSE));
+ freeAsmop (NULL, aop, ic, TRUE);
+ }
+ else
+ {
+ /* we did not allocate which means left
+ already in a pointer register, then
+ if size > 0 && this could be used again
+ we have to point it back to where it
+ belongs */
+ if ((AOP_SIZE (result) > 1 &&
+ !OP_SYMBOL (left)->remat &&
+ (OP_SYMBOL (left)->liveTo > ic->seq ||
+ ic->depth)) &&
+ !pi)
+ {
+ int size = AOP_SIZE (result) - 1;
+ while (size--)
+ emitcode ("dec", "%s", rname);
}
}
- /* done */
- freeAsmop(result,NULL,ic,TRUE);
-
-
+ /* done */
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+ if (pi) pi->generated = 1;
+
+}
+
+/*--------------------------------------------------------------------*/
+/* loadDptrFromOperand - load dptr (and optionally B) from operand op */
+/*--------------------------------------------------------------------*/
+static void
+loadDptrFromOperand (operand *op, bool loadBToo)
+{
+ if (AOP_TYPE (op) != AOP_STR)
+ {
+ /* if this is remateriazable */
+ if (AOP_TYPE (op) == AOP_IMMD)
+ {
+ emitcode ("mov", "dptr,%s", aopGet (AOP (op), 0, TRUE, FALSE));
+ if (loadBToo)
+ {
+ if (AOP(op)->aopu.aop_immd.from_cast_remat)
+ emitcode ("mov", "b,%s",aopGet(AOP (op), AOP_SIZE(op)-1, FALSE, FALSE));
+ else
+ {
+ wassertl(FALSE, "need pointerCode");
+ emitcode ("", "; mov b,???");
+ /* genPointerGet and genPointerSet originally did different
+ ** things for this case. Both seem wrong.
+ ** from genPointerGet:
+ ** emitcode ("mov", "b,#%d", pointerCode (retype));
+ ** from genPointerSet:
+ ** emitcode ("mov", "b,%s + 1", aopGet (AOP (result), 0, TRUE, FALSE));
+ */
+ }
+ }
+ }
+ else if (AOP_TYPE (op) == AOP_DPTR)
+ {
+ if (loadBToo)
+ {
+ MOVA (aopGet (AOP (op), 0, FALSE, FALSE));
+ emitcode ("push", "acc");
+ MOVA (aopGet (AOP (op), 1, FALSE, FALSE));
+ emitcode ("push", "acc");
+ emitcode ("mov", "b,%s", aopGet (AOP (op), 2, FALSE, FALSE));
+ emitcode ("pop", "dph");
+ emitcode ("pop", "dpl");
+ }
+ else
+ {
+ MOVA (aopGet (AOP (op), 0, FALSE, FALSE));
+ emitcode ("push", "acc");
+ emitcode ("mov", "dph,%s", aopGet (AOP (op), 1, FALSE, FALSE));
+ emitcode ("pop", "dpl");
+ }
+ }
+ else
+ { /* we need to get it byte by byte */
+ emitcode ("mov", "dpl,%s", aopGet (AOP (op), 0, FALSE, FALSE));
+ emitcode ("mov", "dph,%s", aopGet (AOP (op), 1, FALSE, FALSE));
+ if (loadBToo)
+ emitcode ("mov", "b,%s", aopGet (AOP (op), 2, FALSE, FALSE));
+ }
+ }
}
/*-----------------------------------------------------------------*/
/* genFarPointerGet - gget value from far space */
/*-----------------------------------------------------------------*/
-static void genFarPointerGet (operand *left,
- operand *result, iCode *ic)
+static void
+genFarPointerGet (operand * left,
+ operand * result, iCode * ic, iCode * pi)
{
- int size, offset ;
- link *retype = getSpec(operandType(result));
+ int size, offset;
+ sym_link *retype = getSpec (operandType (result));
- aopOp(left,ic,FALSE);
+ D(emitcode ("; genFarPointerGet",""));
- /* if the operand is already in dptr
- then we do nothing else we move the value to dptr */
- if (AOP_TYPE(left) != AOP_STR) {
- /* if this is remateriazable */
- if (AOP_TYPE(left) == AOP_IMMD)
- emitcode("mov","dptr,%s",aopGet(AOP(left),0,TRUE,FALSE));
- else { /* we need to get it byte by byte */
- emitcode("mov","dpl,%s",aopGet(AOP(left),0,FALSE,FALSE));
- emitcode("mov","dph,%s",aopGet(AOP(left),1,FALSE,FALSE));
- if (options.model == MODEL_FLAT24)
- {
- emitcode("mov", "dpx,%s",aopGet(AOP(left),2,FALSE,FALSE));
- }
- }
- }
- /* so dptr know contains the address */
- freeAsmop(left,NULL,ic,TRUE);
- aopOp(result,ic,FALSE);
-
- /* if bit then unpack */
- if (IS_BITVAR(retype))
- genUnpackBits(result,"dptr",FPOINTER);
- else {
- size = AOP_SIZE(result);
- offset = 0 ;
-
- while (size--) {
- emitcode("movx","a,@dptr");
- aopPut(AOP(result),"a",offset++);
- if (size)
- emitcode("inc","dptr");
- }
- }
+ aopOp (left, ic, FALSE);
+ loadDptrFromOperand (left, FALSE);
+
+ /* so dptr now contains the address */
+ aopOp (result, ic, FALSE);
- freeAsmop(result,NULL,ic,TRUE);
+ /* if bit then unpack */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, "dptr", FPOINTER);
+ else
+ {
+ size = AOP_SIZE (result);
+ offset = 0;
+
+ while (size--)
+ {
+ emitcode ("movx", "a,@dptr");
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ if (size || pi)
+ emitcode ("inc", "dptr");
+ }
+ }
+
+ if (pi && AOP_TYPE (left) != AOP_IMMD && AOP_TYPE (left) != AOP_STR) {
+ aopPut ( AOP (left), "dpl", 0, isOperandVolatile (left, FALSE));
+ aopPut ( AOP (left), "dph", 1, isOperandVolatile (left, FALSE));
+ pi->generated = 1;
+ }
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* emitcodePointerGet - gget value from code space */
+/* genCodePointerGet - gget value from code space */
/*-----------------------------------------------------------------*/
-static void emitcodePointerGet (operand *left,
- operand *result, iCode *ic)
+static void
+genCodePointerGet (operand * left,
+ operand * result, iCode * ic, iCode *pi)
{
- int size, offset ;
- link *retype = getSpec(operandType(result));
+ int size, offset;
+ sym_link *retype = getSpec (operandType (result));
- aopOp(left,ic,FALSE);
+ D(emitcode ("; genCodePointerGet",""));
- /* if the operand is already in dptr
- then we do nothing else we move the value to dptr */
- if (AOP_TYPE(left) != AOP_STR) {
- /* if this is remateriazable */
- if (AOP_TYPE(left) == AOP_IMMD)
- emitcode("mov","dptr,%s",aopGet(AOP(left),0,TRUE,FALSE));
- else { /* we need to get it byte by byte */
- emitcode("mov","dpl,%s",aopGet(AOP(left),0,FALSE,FALSE));
- emitcode("mov","dph,%s",aopGet(AOP(left),1,FALSE,FALSE));
- if (options.model == MODEL_FLAT24)
- {
- emitcode("mov", "dpx,%s",aopGet(AOP(left),2,FALSE,FALSE));
- }
- }
- }
- /* so dptr know contains the address */
- freeAsmop(left,NULL,ic,TRUE);
- aopOp(result,ic,FALSE);
-
- /* if bit then unpack */
- if (IS_BITVAR(retype))
- genUnpackBits(result,"dptr",CPOINTER);
- else {
- size = AOP_SIZE(result);
- offset = 0 ;
-
- while (size--) {
- emitcode("clr","a");
- emitcode("movc","a,@a+dptr");
- aopPut(AOP(result),"a",offset++);
- if (size)
- emitcode("inc","dptr");
- }
+ aopOp (left, ic, FALSE);
+ loadDptrFromOperand (left, FALSE);
+
+ /* so dptr now contains the address */
+ aopOp (result, ic, FALSE);
+
+ /* if bit then unpack */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, "dptr", CPOINTER);
+ else
+ {
+ size = AOP_SIZE (result);
+ offset = 0;
+
+ while (size--)
+ {
+ if (pi)
+ {
+ emitcode ("clr", "a");
+ emitcode ("movc", "a,@a+dptr");
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ emitcode ("inc", "dptr");
+ }
+ else
+ {
+ emitcode ("mov", "a,#0x%02x", offset);
+ emitcode ("movc", "a,@a+dptr");
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ }
+ }
}
- freeAsmop(result,NULL,ic,TRUE);
+ if (pi && AOP_TYPE (left) != AOP_IMMD && AOP_TYPE (left) != AOP_STR) {
+ aopPut ( AOP (left), "dpl", 0, isOperandVolatile (left, FALSE));
+ aopPut ( AOP (left), "dph", 1, isOperandVolatile (left, FALSE));
+ pi->generated = 1;
+ }
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genGenPointerGet - gget value from generic pointer space */
/*-----------------------------------------------------------------*/
-static void genGenPointerGet (operand *left,
- operand *result, iCode *ic)
+static void
+genGenPointerGet (operand * left,
+ operand * result, iCode * ic, iCode *pi)
{
- int size, offset ;
- link *retype = getSpec(operandType(result));
+ int size, offset;
+ sym_link *retype = getSpec (operandType (result));
+
+ D(emitcode ("; genGenPointerGet",""));
- aopOp(left,ic,FALSE);
+ aopOp (left, ic, FALSE);
+ loadDptrFromOperand (left, TRUE);
+
+ /* so dptr know contains the address */
+ aopOp (result, ic, FALSE);
+
+ /* if bit then unpack */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, "dptr", GPOINTER);
+ else
+ {
+ size = AOP_SIZE (result);
+ offset = 0;
- /* if the operand is already in dptr
- then we do nothing else we move the value to dptr */
- if (AOP_TYPE(left) != AOP_STR) {
- /* if this is remateriazable */
- if (AOP_TYPE(left) == AOP_IMMD) {
- emitcode("mov","dptr,%s",aopGet(AOP(left),0,TRUE,FALSE));
- emitcode("mov","b,#%d",pointerCode(retype));
+ while (size--)
+ {
+ emitcode ("lcall", "__gptrget");
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
+ if (size || pi)
+ emitcode ("inc", "dptr");
}
- else { /* we need to get it byte by byte */
- emitcode("mov","dpl,%s",aopGet(AOP(left),0,FALSE,FALSE));
- emitcode("mov","dph,%s",aopGet(AOP(left),1,FALSE,FALSE));
- if (options.model == MODEL_FLAT24)
- {
- emitcode("mov", "dpx,%s",aopGet(AOP(left),2,FALSE,FALSE));
- emitcode("mov","b,%s",aopGet(AOP(left),3,FALSE,FALSE));
- }
- else
- {
- emitcode("mov","b,%s",aopGet(AOP(left),2,FALSE,FALSE));
- }
- }
- }
- /* so dptr know contains the address */
- freeAsmop(left,NULL,ic,TRUE);
- aopOp(result,ic,FALSE);
-
- /* if bit then unpack */
- if (IS_BITVAR(retype))
- genUnpackBits(result,"dptr",GPOINTER);
- else {
- size = AOP_SIZE(result);
- offset = 0 ;
-
- while (size--) {
- emitcode("lcall","__gptrget");
- aopPut(AOP(result),"a",offset++);
- if (size)
- emitcode("inc","dptr");
- }
}
- freeAsmop(result,NULL,ic,TRUE);
+ if (pi && AOP_TYPE (left) != AOP_IMMD && AOP_TYPE (left) != AOP_STR) {
+ aopPut ( AOP (left), "dpl", 0, isOperandVolatile (left, FALSE));
+ aopPut ( AOP (left), "dph", 1, isOperandVolatile (left, FALSE));
+ pi->generated = 1;
+ }
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genPointerGet - generate code for pointer get */
/*-----------------------------------------------------------------*/
-static void genPointerGet (iCode *ic)
-{
- operand *left, *result ;
- link *type, *etype;
- int p_type;
-
- left = IC_LEFT(ic);
- result = IC_RESULT(ic) ;
-
- /* depending on the type of pointer we need to
- move it to the correct pointer register */
- type = operandType(left);
- etype = getSpec(type);
- /* if left is of type of pointer then it is simple */
- if (IS_PTR(type) && !IS_FUNC(type->next))
- p_type = DCL_TYPE(type);
- else {
- /* we have to go by the storage class */
- p_type = PTR_TYPE(SPEC_OCLS(etype));
-
-/* if (SPEC_OCLS(etype)->codesp ) { */
-/* p_type = CPOINTER ; */
-/* } */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && !SPEC_OCLS(etype)->paged) */
-/* p_type = FPOINTER ; */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && SPEC_OCLS(etype)->paged) */
-/* p_type = PPOINTER; */
-/* else */
-/* if (SPEC_OCLS(etype) == idata ) */
-/* p_type = IPOINTER; */
-/* else */
-/* p_type = POINTER ; */
- }
-
- /* now that we have the pointer type we assign
- the pointer values */
- switch (p_type) {
-
- case POINTER:
+static void
+genPointerGet (iCode * ic, iCode *pi)
+{
+ operand *left, *result;
+ sym_link *type, *etype;
+ int p_type;
+
+ D(emitcode ("; genPointerGet",""));
+
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+
+ /* depending on the type of pointer we need to
+ move it to the correct pointer register */
+ type = operandType (left);
+ etype = getSpec (type);
+ /* if left is of type of pointer then it is simple */
+ if (IS_PTR (type) && !IS_FUNC (type->next))
+ p_type = DCL_TYPE (type);
+ else
+ {
+ /* we have to go by the storage class */
+ p_type = PTR_TYPE (SPEC_OCLS (etype));
+ }
+
+ /* special case when cast remat */
+ if (p_type == GPOINTER && OP_SYMBOL(left)->remat &&
+ IS_CAST_ICODE(OP_SYMBOL(left)->rematiCode)) {
+ left = IC_RIGHT(OP_SYMBOL(left)->rematiCode);
+ type = operandType (left);
+ p_type = DCL_TYPE (type);
+ }
+ /* now that we have the pointer type we assign
+ the pointer values */
+ switch (p_type)
+ {
+
+ case POINTER:
case IPOINTER:
- genNearPointerGet (left,result,ic);
- break;
+ genNearPointerGet (left, result, ic, pi);
+ break;
case PPOINTER:
- genPagedPointerGet(left,result,ic);
- break;
+ genPagedPointerGet (left, result, ic, pi);
+ break;
case FPOINTER:
- genFarPointerGet (left,result,ic);
- break;
+ genFarPointerGet (left, result, ic, pi);
+ break;
case CPOINTER:
- emitcodePointerGet (left,result,ic);
- break;
+ genCodePointerGet (left, result, ic, pi);
+ break;
case GPOINTER:
- genGenPointerGet (left,result,ic);
- break;
+ genGenPointerGet (left, result, ic, pi);
+ break;
}
}
+
+
/*-----------------------------------------------------------------*/
/* genPackBits - generates code for packed bit storage */
/*-----------------------------------------------------------------*/
-static void genPackBits (link *etype ,
- operand *right ,
- char *rname, int p_type)
+static void
+genPackBits (sym_link * etype,
+ operand * right,
+ char *rname, int p_type)
{
- int shCount = 0 ;
- int offset = 0 ;
- int rLen = 0 ;
- int blen, bstr ;
- char *l ;
-
- blen = SPEC_BLEN(etype);
- bstr = SPEC_BSTR(etype);
-
- l = aopGet(AOP(right),offset++,FALSE,FALSE);
- MOVA(l);
-
- /* if the bit lenth is less than or */
- /* it exactly fits a byte then */
- if (SPEC_BLEN(etype) <= 8 ) {
- shCount = SPEC_BSTR(etype) ;
-
- /* shift left acc */
- AccLsh(shCount);
-
- if (SPEC_BLEN(etype) < 8 ) { /* if smaller than a byte */
+ int offset = 0; /* source byte offset */
+ int rlen = 0; /* remaining bitfield length */
+ int blen; /* bitfield length */
+ int bstr; /* bitfield starting bit within byte */
+ int litval; /* source literal value (if AOP_LIT) */
+ unsigned char mask; /* bitmask within current byte */
+ D(emitcode ("; genPackBits",""));
- switch (p_type) {
- case POINTER:
- emitcode ("mov","b,a");
- emitcode("mov","a,@%s",rname);
- break;
+ blen = SPEC_BLEN (etype);
+ bstr = SPEC_BSTR (etype);
- case FPOINTER:
- emitcode ("mov","b,a");
- emitcode("movx","a,@dptr");
- break;
+ /* If the bitfield length is less than a byte */
+ if (blen < 8)
+ {
+ mask = ((unsigned char) (0xFF << (blen + bstr)) |
+ (unsigned char) (0xFF >> (8 - bstr)));
- case GPOINTER:
- emitcode ("push","b");
- emitcode ("push","acc");
- emitcode ("lcall","__gptrget");
- emitcode ("pop","b");
- break;
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ /* Case with a bitfield length <8 and literal source
+ */
+ litval = (int) floatFromVal (AOP (right)->aopu.aop_lit);
+ litval <<= bstr;
+ litval &= (~mask) & 0xff;
+ emitPtrByteGet (rname, p_type, FALSE);
+ if ((mask|litval)!=0xff)
+ emitcode ("anl","a,#0x%02x", mask);
+ if (litval)
+ emitcode ("orl","a,#0x%02x", litval);
+ }
+ else
+ {
+ if ((blen==1) && (p_type!=GPOINTER))
+ {
+ /* Case with a bitfield length == 1 and no generic pointer
+ */
+ if (AOP_TYPE (right) == AOP_CRY)
+ emitcode ("mov", "c,%s", AOP(right)->aopu.aop_dir);
+ else
+ {
+ MOVA (aopGet (AOP (right), 0, FALSE, FALSE));
+ emitcode ("rrc","a");
+ }
+ emitPtrByteGet (rname, p_type, FALSE);
+ emitcode ("mov","acc.%d,c",bstr);
}
-
- emitcode ("anl","a,#0x%02x",(unsigned char)
- ((unsigned char)(0xFF << (blen+bstr)) |
- (unsigned char)(0xFF >> (8-bstr)) ) );
- emitcode ("orl","a,b");
- if (p_type == GPOINTER)
- emitcode("pop","b");
+ else
+ {
+ /* Case with a bitfield length < 8 and arbitrary source
+ */
+ MOVA (aopGet (AOP (right), 0, FALSE, FALSE));
+ /* shift and mask source value */
+ AccLsh (bstr);
+ emitcode ("anl", "a,#0x%02x", (~mask) & 0xff);
+
+ /* transfer A to B and get next byte */
+ emitPtrByteGet (rname, p_type, TRUE);
+
+ emitcode ("anl", "a,#0x%02x", mask);
+ emitcode ("orl", "a,b");
+ if (p_type == GPOINTER)
+ emitcode ("pop", "b");
+ }
}
+
+ emitPtrByteSet (rname, p_type, "a");
+ return;
}
- switch (p_type) {
- case POINTER:
- emitcode("mov","@%s,a",rname);
- break;
-
- case FPOINTER:
- emitcode("movx","@dptr,a");
- break;
-
- case GPOINTER:
- emitcode("lcall","__gptrput");
- break;
- }
-
- /* if we r done */
- if ( SPEC_BLEN(etype) <= 8 )
- return ;
-
- emitcode("inc","%s",rname);
- rLen = SPEC_BLEN(etype) ;
-
- /* now generate for lengths greater than one byte */
- while (1) {
-
- l = aopGet(AOP(right),offset++,FALSE,TRUE);
-
- rLen -= 8 ;
- if (rLen <= 0 )
- break ;
-
- switch (p_type) {
- case POINTER:
- if (*l == '@') {
- MOVA(l);
- emitcode("mov","@%s,a",rname);
- } else
- emitcode("mov","@%s,%s",rname,l);
- break;
-
- case FPOINTER:
- MOVA(l);
- emitcode("movx","@dptr,a");
- break;
-
- case GPOINTER:
- MOVA(l);
- emitcode("lcall","__gptrput");
- break;
- }
- emitcode ("inc","%s",rname);
- }
-
- MOVA(l);
-
- /* last last was not complete */
- if (rLen) {
- /* save the byte & read byte */
- switch (p_type) {
- case POINTER:
- emitcode ("mov","b,a");
- emitcode("mov","a,@%s",rname);
- break;
-
- case FPOINTER:
- emitcode ("mov","b,a");
- emitcode("movx","a,@dptr");
- break;
-
- case GPOINTER:
- emitcode ("push","b");
- emitcode ("push","acc");
- emitcode ("lcall","__gptrget");
- emitcode ("pop","b");
- break;
- }
+ /* Bit length is greater than 7 bits. In this case, copy */
+ /* all except the partial byte at the end */
+ for (rlen=blen;rlen>=8;rlen-=8)
+ {
+ emitPtrByteSet (rname, p_type,
+ aopGet (AOP (right), offset++, FALSE, TRUE) );
+ if (rlen>8)
+ emitcode ("inc", "%s", rname);
+ }
- emitcode ("anl","a,#0x%02x",((unsigned char)-1 << -rLen) );
- emitcode ("orl","a,b");
+ /* If there was a partial byte at the end */
+ if (rlen)
+ {
+ mask = (((unsigned char) -1 << rlen) & 0xff);
+
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ /* Case with partial byte and literal source
+ */
+ litval = (int) floatFromVal (AOP (right)->aopu.aop_lit);
+ litval >>= (blen-rlen);
+ litval &= (~mask) & 0xff;
+ emitPtrByteGet (rname, p_type, FALSE);
+ if ((mask|litval)!=0xff)
+ emitcode ("anl","a,#0x%02x", mask);
+ if (litval)
+ emitcode ("orl","a,#0x%02x", litval);
+ }
+ else
+ {
+ /* Case with partial byte and arbitrary source
+ */
+ MOVA (aopGet (AOP (right), offset++, FALSE, FALSE));
+ emitcode ("anl", "a,#0x%02x", (~mask) & 0xff);
+
+ /* transfer A to B and get next byte */
+ emitPtrByteGet (rname, p_type, TRUE);
+
+ emitcode ("anl", "a,#0x%02x", mask);
+ emitcode ("orl", "a,b");
+ if (p_type == GPOINTER)
+ emitcode ("pop", "b");
+ }
+ emitPtrByteSet (rname, p_type, "a");
}
- if (p_type == GPOINTER)
- emitcode("pop","b");
+}
- switch (p_type) {
- case POINTER:
- emitcode("mov","@%s,a",rname);
- break;
-
- case FPOINTER:
- emitcode("movx","@dptr,a");
- break;
-
- case GPOINTER:
- emitcode("lcall","__gptrput");
- break;
- }
-}
/*-----------------------------------------------------------------*/
/* genDataPointerSet - remat pointer to data space */
/*-----------------------------------------------------------------*/
-static void genDataPointerSet(operand *right,
- operand *result,
- iCode *ic)
+static void
+genDataPointerSet (operand * right,
+ operand * result,
+ iCode * ic)
{
- int size, offset = 0 ;
- char *l, buffer[256];
+ int size, offset = 0;
+ char *l, buffer[256];
- aopOp(right,ic,FALSE);
-
- l = aopGet(AOP(result),0,FALSE,TRUE);
- size = AOP_SIZE(right);
- while (size--) {
- if (offset)
- sprintf(buffer,"(%s + %d)",l+1,offset);
- else
- sprintf(buffer,"%s",l+1);
- emitcode("mov","%s,%s",buffer,
- aopGet(AOP(right),offset++,FALSE,FALSE));
+ D(emitcode ("; genDataPointerSet",""));
+
+ aopOp (right, ic, FALSE);
+
+ l = aopGet (AOP (result), 0, FALSE, TRUE);
+ size = AOP_SIZE (right);
+ while (size--)
+ {
+ if (offset)
+ sprintf (buffer, "(%s + %d)", l + 1, offset);
+ else
+ sprintf (buffer, "%s", l + 1);
+ emitcode ("mov", "%s,%s", buffer,
+ aopGet (AOP (right), offset++, FALSE, FALSE));
}
- freeAsmop(right,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genNearPointerSet - emitcode for near pointer put */
/*-----------------------------------------------------------------*/
-static void genNearPointerSet (operand *right,
- operand *result,
- iCode *ic)
+static void
+genNearPointerSet (operand * right,
+ operand * result,
+ iCode * ic,
+ iCode * pi)
{
- asmop *aop = NULL;
- regs *preg = NULL ;
- char *rname , *l;
- link *retype;
- link *ptype = operandType(result);
-
- retype= getSpec(operandType(right));
-
- aopOp(result,ic,FALSE);
-
- /* if the result is rematerializable &
- in data space & not a bit variable */
- if (AOP_TYPE(result) == AOP_IMMD &&
- DCL_TYPE(ptype) == POINTER &&
- !IS_BITVAR(retype)) {
- genDataPointerSet (right,result,ic);
- return;
+ asmop *aop = NULL;
+ regs *preg = NULL;
+ char *rname, *l;
+ sym_link *retype, *letype;
+ sym_link *ptype = operandType (result);
+
+ D(emitcode ("; genNearPointerSet",""));
+
+ retype = getSpec (operandType (right));
+ letype = getSpec (ptype);
+ aopOp (result, ic, FALSE);
+
+ /* if the result is rematerializable &
+ in data space & not a bit variable */
+ if (AOP_TYPE (result) == AOP_IMMD &&
+ DCL_TYPE (ptype) == POINTER &&
+ !IS_BITVAR (retype) &&
+ !IS_BITVAR (letype))
+ {
+ genDataPointerSet (right, result, ic);
+ return;
}
- /* if the value is already in a pointer register
- then don't need anything more */
- if (!AOP_INPREG(AOP(result))) {
- /* otherwise get a free pointer register */
- aop = newAsmop(0);
- preg = getFreePtr(ic,&aop,FALSE);
- emitcode("mov","%s,%s",
- preg->name,
- aopGet(AOP(result),0,FALSE,TRUE));
- rname = preg->name ;
- } else
- rname = aopGet(AOP(result),0,FALSE,FALSE);
-
- freeAsmop(result,NULL,ic,TRUE);
- aopOp (right,ic,FALSE);
-
- /* if bitfield then unpack the bits */
- if (IS_BITVAR(retype))
- genPackBits (retype,right,rname,POINTER);
- else {
- /* we have can just get the values */
- int size = AOP_SIZE(right);
- int offset = 0 ;
-
- while (size--) {
- l = aopGet(AOP(right),offset,FALSE,TRUE);
- if (*l == '@' ) {
- MOVA(l);
- emitcode("mov","@%s,a",rname);
- } else
- emitcode("mov","@%s,%s",rname,l);
- if (size)
- emitcode("inc","%s",rname);
- offset++;
- }
+ /* if the value is already in a pointer register
+ then don't need anything more */
+ if (!AOP_INPREG (AOP (result)))
+ {
+ if (
+ //AOP_TYPE (result) == AOP_STK
+ IS_AOP_PREG(result)
+ )
+ {
+ // Aha, it is a pointer, just in disguise.
+ rname = aopGet (AOP (result), 0, FALSE, FALSE);
+ if (*rname != '@')
+ {
+ fprintf(stderr, "probable internal error: unexpected rname @ %s:%d\n",
+ __FILE__, __LINE__);
+ }
+ else
+ {
+ // Expected case.
+ emitcode ("mov", "a%s,%s", rname + 1, rname);
+ rname++; // skip the '@'.
+ }
+ }
+ else
+ {
+ /* otherwise get a free pointer register */
+ aop = newAsmop (0);
+ preg = getFreePtr (ic, &aop, FALSE);
+ emitcode ("mov", "%s,%s",
+ preg->name,
+ aopGet (AOP (result), 0, FALSE, TRUE));
+ rname = preg->name;
+ }
}
-
- /* now some housekeeping stuff */
- if (aop) {
- /* we had to allocate for this iCode */
- freeAsmop(NULL,aop,ic,TRUE);
- } else {
- /* we did not allocate which means left
- already in a pointer register, then
- if size > 0 && this could be used again
- we have to point it back to where it
- belongs */
- if (AOP_SIZE(right) > 1 &&
- !OP_SYMBOL(result)->remat &&
- ( OP_SYMBOL(result)->liveTo > ic->seq ||
- ic->depth )) {
- int size = AOP_SIZE(right) - 1;
- while (size--)
- emitcode("dec","%s",rname);
- }
+ else
+ {
+ rname = aopGet (AOP (result), 0, FALSE, FALSE);
}
- /* done */
- freeAsmop(right,NULL,ic,TRUE);
+ aopOp (right, ic, FALSE);
+
+ /* if bitfield then unpack the bits */
+ if (IS_BITVAR (retype) || IS_BITVAR (letype))
+ genPackBits ((IS_BITVAR (retype) ? retype : letype), right, rname, POINTER);
+ else
+ {
+ /* we have can just get the values */
+ int size = AOP_SIZE (right);
+ int offset = 0;
+
+ while (size--)
+ {
+ l = aopGet (AOP (right), offset, FALSE, TRUE);
+ if (*l == '@')
+ {
+ MOVA (l);
+ emitcode ("mov", "@%s,a", rname);
+ }
+ else
+ emitcode ("mov", "@%s,%s", rname, l);
+ if (size || pi)
+ emitcode ("inc", "%s", rname);
+ offset++;
+ }
+ }
+ /* now some housekeeping stuff */
+ if (aop) /* we had to allocate for this iCode */
+ {
+ if (pi)
+ aopPut (AOP (result), rname, 0, isOperandVolatile (result, FALSE));
+ freeAsmop (NULL, aop, ic, TRUE);
+ }
+ else
+ {
+ /* we did not allocate which means left
+ already in a pointer register, then
+ if size > 0 && this could be used again
+ we have to point it back to where it
+ belongs */
+ if ((AOP_SIZE (right) > 1 &&
+ !OP_SYMBOL (result)->remat &&
+ (OP_SYMBOL (result)->liveTo > ic->seq ||
+ ic->depth)) &&
+ !pi)
+ {
+ int size = AOP_SIZE (right) - 1;
+ while (size--)
+ emitcode ("dec", "%s", rname);
+ }
+ }
+ /* done */
+ if (pi) pi->generated = 1;
+ freeAsmop (result, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genPagedPointerSet - emitcode for Paged pointer put */
/*-----------------------------------------------------------------*/
-static void genPagedPointerSet (operand *right,
- operand *result,
- iCode *ic)
+static void
+genPagedPointerSet (operand * right,
+ operand * result,
+ iCode * ic,
+ iCode * pi)
{
- asmop *aop = NULL;
- regs *preg = NULL ;
- char *rname , *l;
- link *retype;
-
- retype= getSpec(operandType(right));
-
- aopOp(result,ic,FALSE);
-
- /* if the value is already in a pointer register
- then don't need anything more */
- if (!AOP_INPREG(AOP(result))) {
- /* otherwise get a free pointer register */
- aop = newAsmop(0);
- preg = getFreePtr(ic,&aop,FALSE);
- emitcode("mov","%s,%s",
+ asmop *aop = NULL;
+ regs *preg = NULL;
+ char *rname, *l;
+ sym_link *retype, *letype;
+
+ D(emitcode ("; genPagedPointerSet",""));
+
+ retype = getSpec (operandType (right));
+ letype = getSpec (operandType (result));
+
+ aopOp (result, ic, FALSE);
+
+ /* if the value is already in a pointer register
+ then don't need anything more */
+ if (!AOP_INPREG (AOP (result)))
+ {
+ /* otherwise get a free pointer register */
+ aop = newAsmop (0);
+ preg = getFreePtr (ic, &aop, FALSE);
+ emitcode ("mov", "%s,%s",
preg->name,
- aopGet(AOP(result),0,FALSE,TRUE));
- rname = preg->name ;
- } else
- rname = aopGet(AOP(result),0,FALSE,FALSE);
-
- freeAsmop(result,NULL,ic,TRUE);
- aopOp (right,ic,FALSE);
-
- /* if bitfield then unpack the bits */
- if (IS_BITVAR(retype))
- genPackBits (retype,right,rname,PPOINTER);
- else {
- /* we have can just get the values */
- int size = AOP_SIZE(right);
- int offset = 0 ;
-
- while (size--) {
- l = aopGet(AOP(right),offset,FALSE,TRUE);
-
- MOVA(l);
- emitcode("movx","@%s,a",rname);
+ aopGet (AOP (result), 0, FALSE, TRUE));
+ rname = preg->name;
+ }
+ else
+ rname = aopGet (AOP (result), 0, FALSE, FALSE);
- if (size)
- emitcode("inc","%s",rname);
+ aopOp (right, ic, FALSE);
- offset++;
+ /* if bitfield then unpack the bits */
+ if (IS_BITVAR (retype) || IS_BITVAR (letype))
+ genPackBits ((IS_BITVAR (retype) ? retype : letype), right, rname, PPOINTER);
+ else
+ {
+ /* we have can just get the values */
+ int size = AOP_SIZE (right);
+ int offset = 0;
+
+ while (size--)
+ {
+ l = aopGet (AOP (right), offset, FALSE, TRUE);
+
+ MOVA (l);
+ emitcode ("movx", "@%s,a", rname);
+
+ if (size || pi)
+ emitcode ("inc", "%s", rname);
+
+ offset++;
}
}
-
- /* now some housekeeping stuff */
- if (aop) {
- /* we had to allocate for this iCode */
- freeAsmop(NULL,aop,ic,TRUE);
- } else {
- /* we did not allocate which means left
- already in a pointer register, then
- if size > 0 && this could be used again
- we have to point it back to where it
- belongs */
- if (AOP_SIZE(right) > 1 &&
- !OP_SYMBOL(result)->remat &&
- ( OP_SYMBOL(result)->liveTo > ic->seq ||
- ic->depth )) {
- int size = AOP_SIZE(right) - 1;
- while (size--)
- emitcode("dec","%s",rname);
- }
- }
-
- /* done */
- freeAsmop(right,NULL,ic,TRUE);
-
-
+
+ /* now some housekeeping stuff */
+ if (aop) /* we had to allocate for this iCode */
+ {
+ if (pi)
+ aopPut (AOP (result), rname, 0, isOperandVolatile (result, FALSE));
+ freeAsmop (NULL, aop, ic, TRUE);
+ }
+ else
+ {
+ /* we did not allocate which means left
+ already in a pointer register, then
+ if size > 0 && this could be used again
+ we have to point it back to where it
+ belongs */
+ if (AOP_SIZE (right) > 1 &&
+ !OP_SYMBOL (result)->remat &&
+ (OP_SYMBOL (result)->liveTo > ic->seq ||
+ ic->depth))
+ {
+ int size = AOP_SIZE (right) - 1;
+ while (size--)
+ emitcode ("dec", "%s", rname);
+ }
+ }
+
+ /* done */
+ if (pi) pi->generated = 1;
+ freeAsmop (result, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
+
+
}
/*-----------------------------------------------------------------*/
/* genFarPointerSet - set value from far space */
/*-----------------------------------------------------------------*/
-static void genFarPointerSet (operand *right,
- operand *result, iCode *ic)
+static void
+genFarPointerSet (operand * right,
+ operand * result, iCode * ic, iCode * pi)
{
- int size, offset ;
- link *retype = getSpec(operandType(right));
+ int size, offset;
+ sym_link *retype = getSpec (operandType (right));
+ sym_link *letype = getSpec (operandType (result));
- aopOp(result,ic,FALSE);
+ D(emitcode ("; genFarPointerSet",""));
- /* if the operand is already in dptr
- then we do nothing else we move the value to dptr */
- if (AOP_TYPE(result) != AOP_STR) {
- /* if this is remateriazable */
- if (AOP_TYPE(result) == AOP_IMMD)
- emitcode("mov","dptr,%s",aopGet(AOP(result),0,TRUE,FALSE));
- else { /* we need to get it byte by byte */
- emitcode("mov","dpl,%s",aopGet(AOP(result),0,FALSE,FALSE));
- emitcode("mov","dph,%s",aopGet(AOP(result),1,FALSE,FALSE));
- if (options.model == MODEL_FLAT24)
- {
- emitcode("mov", "dpx,%s",aopGet(AOP(result),2,FALSE,FALSE));
- }
- }
- }
- /* so dptr know contains the address */
- freeAsmop(result,NULL,ic,TRUE);
- aopOp(right,ic,FALSE);
-
- /* if bit then unpack */
- if (IS_BITVAR(retype))
- genPackBits(retype,right,"dptr",FPOINTER);
- else {
- size = AOP_SIZE(right);
- offset = 0 ;
-
- while (size--) {
- char *l = aopGet(AOP(right),offset++,FALSE,FALSE);
- MOVA(l);
- emitcode("movx","@dptr,a");
- if (size)
- emitcode("inc","dptr");
- }
- }
+ aopOp (result, ic, FALSE);
+ loadDptrFromOperand (result, FALSE);
+
+ /* so dptr know contains the address */
+ aopOp (right, ic, FALSE);
- freeAsmop(right,NULL,ic,TRUE);
+ /* if bit then unpack */
+ if (IS_BITVAR (retype) || IS_BITVAR (letype))
+ genPackBits ((IS_BITVAR (retype) ? retype : letype), right, "dptr", FPOINTER);
+ else
+ {
+ size = AOP_SIZE (right);
+ offset = 0;
+
+ while (size--)
+ {
+ char *l = aopGet (AOP (right), offset++, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("movx", "@dptr,a");
+ if (size || pi)
+ emitcode ("inc", "dptr");
+ }
+ }
+ if (pi && AOP_TYPE (result) != AOP_STR && AOP_TYPE (result) != AOP_IMMD) {
+ aopPut (AOP(result), "dpl", 0, isOperandVolatile (result, FALSE));
+ aopPut (AOP(result), "dph", 1, isOperandVolatile (result, FALSE));
+ pi->generated=1;
+ }
+ freeAsmop (result, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genGenPointerSet - set value from generic pointer space */
/*-----------------------------------------------------------------*/
-static void genGenPointerSet (operand *right,
- operand *result, iCode *ic)
+static void
+genGenPointerSet (operand * right,
+ operand * result, iCode * ic, iCode * pi)
{
- int size, offset ;
- link *retype = getSpec(operandType(right));
+ int size, offset;
+ sym_link *retype = getSpec (operandType (right));
+ sym_link *letype = getSpec (operandType (result));
- aopOp(result,ic,FALSE);
+ D(emitcode ("; genGenPointerSet",""));
- /* if the operand is already in dptr
- then we do nothing else we move the value to dptr */
- if (AOP_TYPE(result) != AOP_STR) {
- /* if this is remateriazable */
- if (AOP_TYPE(result) == AOP_IMMD) {
- emitcode("mov","dptr,%s",aopGet(AOP(result),0,TRUE,FALSE));
- emitcode("mov","b,%s + 1",aopGet(AOP(result),0,TRUE,FALSE));
- }
- else { /* we need to get it byte by byte */
- emitcode("mov","dpl,%s",aopGet(AOP(result),0,FALSE,FALSE));
- emitcode("mov","dph,%s",aopGet(AOP(result),1,FALSE,FALSE));
- if (options.model == MODEL_FLAT24)
- {
- emitcode("mov", "dpx,%s",aopGet(AOP(result),2,FALSE,FALSE));
- emitcode("mov","b,%s",aopGet(AOP(result),3,FALSE,FALSE));
- }
- else
- {
- emitcode("mov","b,%s",aopGet(AOP(result),2,FALSE,FALSE));
- }
- }
- }
- /* so dptr know contains the address */
- freeAsmop(result,NULL,ic,TRUE);
- aopOp(right,ic,FALSE);
-
- /* if bit then unpack */
- if (IS_BITVAR(retype))
- genPackBits(retype,right,"dptr",GPOINTER);
- else {
- size = AOP_SIZE(right);
- offset = 0 ;
-
- while (size--) {
- char *l = aopGet(AOP(right),offset++,FALSE,FALSE);
- MOVA(l);
- emitcode("lcall","__gptrput");
- if (size)
- emitcode("inc","dptr");
- }
+ aopOp (result, ic, FALSE);
+ loadDptrFromOperand (result, TRUE);
+
+ /* so dptr know contains the address */
+ aopOp (right, ic, FALSE);
+
+ /* if bit then unpack */
+ if (IS_BITVAR (retype) || IS_BITVAR (letype))
+ genPackBits ((IS_BITVAR (retype) ? retype : letype), right, "dptr", GPOINTER);
+ else
+ {
+ size = AOP_SIZE (right);
+ offset = 0;
+
+ while (size--)
+ {
+ char *l = aopGet (AOP (right), offset++, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("lcall", "__gptrput");
+ if (size || pi)
+ emitcode ("inc", "dptr");
+ }
}
- freeAsmop(right,NULL,ic,TRUE);
+ if (pi && AOP_TYPE (result) != AOP_STR && AOP_TYPE (result) != AOP_IMMD) {
+ aopPut (AOP(result), "dpl", 0, isOperandVolatile (result, FALSE));
+ aopPut (AOP(result), "dph", 1, isOperandVolatile (result, FALSE));
+ pi->generated=1;
+ }
+ freeAsmop (result, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genPointerSet - stores the value into a pointer location */
/*-----------------------------------------------------------------*/
-static void genPointerSet (iCode *ic)
-{
- operand *right, *result ;
- link *type, *etype;
- int p_type;
-
- right = IC_RIGHT(ic);
- result = IC_RESULT(ic) ;
-
- /* depending on the type of pointer we need to
- move it to the correct pointer register */
- type = operandType(result);
- etype = getSpec(type);
- /* if left is of type of pointer then it is simple */
- if (IS_PTR(type) && !IS_FUNC(type->next)) {
- p_type = DCL_TYPE(type);
- }
- else {
- /* we have to go by the storage class */
- p_type = PTR_TYPE(SPEC_OCLS(etype));
-
-/* if (SPEC_OCLS(etype)->codesp ) { */
-/* p_type = CPOINTER ; */
-/* } */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && !SPEC_OCLS(etype)->paged) */
-/* p_type = FPOINTER ; */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && SPEC_OCLS(etype)->paged) */
-/* p_type = PPOINTER ; */
-/* else */
-/* if (SPEC_OCLS(etype) == idata ) */
-/* p_type = IPOINTER ; */
-/* else */
-/* p_type = POINTER ; */
- }
-
- /* now that we have the pointer type we assign
- the pointer values */
- switch (p_type) {
+static void
+genPointerSet (iCode * ic, iCode *pi)
+{
+ operand *right, *result;
+ sym_link *type, *etype;
+ int p_type;
+
+ D(emitcode ("; genPointerSet",""));
+
+ right = IC_RIGHT (ic);
+ result = IC_RESULT (ic);
+
+ /* depending on the type of pointer we need to
+ move it to the correct pointer register */
+ type = operandType (result);
+ etype = getSpec (type);
+ /* if left is of type of pointer then it is simple */
+ if (IS_PTR (type) && !IS_FUNC (type->next))
+ {
+ p_type = DCL_TYPE (type);
+ }
+ else
+ {
+ /* we have to go by the storage class */
+ p_type = PTR_TYPE (SPEC_OCLS (etype));
+ }
+
+ /* special case when cast remat */
+ if (p_type == GPOINTER && OP_SYMBOL(result)->remat &&
+ IS_CAST_ICODE(OP_SYMBOL(result)->rematiCode)) {
+ result = IC_RIGHT(OP_SYMBOL(result)->rematiCode);
+ type = operandType (result);
+ p_type = DCL_TYPE (type);
+ }
+ /* now that we have the pointer type we assign
+ the pointer values */
+ switch (p_type)
+ {
case POINTER:
case IPOINTER:
- genNearPointerSet (right,result,ic);
- break;
+ genNearPointerSet (right, result, ic, pi);
+ break;
case PPOINTER:
- genPagedPointerSet (right,result,ic);
- break;
+ genPagedPointerSet (right, result, ic, pi);
+ break;
case FPOINTER:
- genFarPointerSet (right,result,ic);
- break;
+ genFarPointerSet (right, result, ic, pi);
+ break;
case GPOINTER:
- genGenPointerSet (right,result,ic);
- break;
+ genGenPointerSet (right, result, ic, pi);
+ break;
+
+ default:
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "genPointerSet: illegal pointer type");
}
}
/*-----------------------------------------------------------------*/
-/* genIfx - generate code for Ifx statement */
+/* genIfx - generate code for Ifx statement */
+/*-----------------------------------------------------------------*/
+static void
+genIfx (iCode * ic, iCode * popIc)
+{
+ operand *cond = IC_COND (ic);
+ int isbit = 0;
+
+ D(emitcode ("; genIfx",""));
+
+ aopOp (cond, ic, FALSE);
+
+ /* get the value into acc */
+ if (AOP_TYPE (cond) != AOP_CRY)
+ toBoolean (cond);
+ else
+ isbit = 1;
+ /* the result is now in the accumulator */
+ freeAsmop (cond, NULL, ic, TRUE);
+
+ /* if there was something to be popped then do it */
+ if (popIc)
+ genIpop (popIc);
+
+ /* if the condition is a bit variable */
+ if (isbit && IS_ITEMP (cond) &&
+ SPIL_LOC (cond))
+ genIfxJump (ic, SPIL_LOC (cond)->rname);
+ else if (isbit && !IS_ITEMP (cond))
+ genIfxJump (ic, OP_SYMBOL (cond)->rname);
+ else
+ genIfxJump (ic, "a");
+
+ ic->generated = 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* genAddrOf - generates code for address of */
/*-----------------------------------------------------------------*/
-static void genIfx (iCode *ic, iCode *popIc)
+static void
+genAddrOf (iCode * ic)
{
- operand *cond = IC_COND(ic);
- int isbit =0;
+ symbol *sym = OP_SYMBOL (IC_LEFT (ic));
+ int size, offset;
- aopOp(cond,ic,FALSE);
+ D(emitcode ("; genAddrOf",""));
- /* get the value into acc */
- if (AOP_TYPE(cond) != AOP_CRY)
- toBoolean(cond);
- else
- isbit = 1;
- /* the result is now in the accumulator */
- freeAsmop(cond,NULL,ic,TRUE);
-
- /* if there was something to be popped then do it */
- if (popIc)
- genIpop(popIc);
-
- /* if the condition is a bit variable */
- if (isbit && IS_ITEMP(cond) &&
- SPIL_LOC(cond))
- genIfxJump(ic,SPIL_LOC(cond)->rname);
- else
- if (isbit && !IS_ITEMP(cond))
- genIfxJump(ic,OP_SYMBOL(cond)->rname);
- else
- genIfxJump(ic,"a");
+ aopOp (IC_RESULT (ic), ic, FALSE);
- ic->generated = 1;
-}
+ /* if the operand is on the stack then we
+ need to get the stack offset of this
+ variable */
+ if (sym->onStack)
+ {
+ /* if it has an offset then we need to compute
+ it */
+ if (sym->stack)
+ {
+ emitcode ("mov", "a,_bp");
+ emitcode ("add", "a,#0x%02x", ((sym->stack < 0) ?
+ ((char) (sym->stack - _G.nRegsSaved)) :
+ ((char) sym->stack)) & 0xff);
+ aopPut (AOP (IC_RESULT (ic)), "a", 0, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ else
+ {
+ /* we can just move _bp */
+ aopPut (AOP (IC_RESULT (ic)), "_bp", 0, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ /* fill the result with zero */
+ size = AOP_SIZE (IC_RESULT (ic)) - 1;
-/*-----------------------------------------------------------------*/
-/* genAddrOf - generates code for address of */
-/*-----------------------------------------------------------------*/
-static void genAddrOf (iCode *ic)
-{
- symbol *sym = OP_SYMBOL(IC_LEFT(ic));
- int size, offset ;
-
- aopOp(IC_RESULT(ic),ic,FALSE);
-
- /* if the operand is on the stack then we
- need to get the stack offset of this
- variable */
- if (sym->onStack) {
- /* if it has an offset then we need to compute
- it */
- if (sym->stack) {
- emitcode("mov","a,_bp");
- emitcode("add","a,#0x%02x",((char) sym->stack & 0xff));
- aopPut(AOP(IC_RESULT(ic)),"a",0);
- } else
- /* we can just move _bp */
- aopPut(AOP(IC_RESULT(ic)),"_bp",0);
- /* fill the result with zero */
- size = AOP_SIZE(IC_RESULT(ic)) - 1;
- offset = 1;
- while (size--)
- aopPut(AOP(IC_RESULT(ic)),zero,offset++);
-
- goto release;
- }
-
- /* object not on stack then we need the name */
- size = AOP_SIZE(IC_RESULT(ic));
- offset = 0;
-
- while (size--) {
- char s[SDCC_NAME_MAX];
- if (offset)
- sprintf(s,"#(%s >> %d)",
- sym->rname,
- offset*8);
- else
- sprintf(s,"#%s",sym->rname);
- aopPut(AOP(IC_RESULT(ic)),s,offset++);
+ offset = 1;
+ while (size--)
+ {
+ aopPut (AOP (IC_RESULT (ic)), zero, offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+
+ goto release;
+ }
+
+ /* object not on stack then we need the name */
+ size = AOP_SIZE (IC_RESULT (ic));
+ offset = 0;
+
+ while (size--)
+ {
+ char s[SDCC_NAME_MAX];
+ if (offset)
+ sprintf (s, "#(%s >> %d)",
+ sym->rname,
+ offset * 8);
+ else
+ sprintf (s, "#%s", sym->rname);
+ aopPut (AOP (IC_RESULT (ic)), s, offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
}
release:
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genFarFarAssign - assignment when both are in far space */
/*-----------------------------------------------------------------*/
-static void genFarFarAssign (operand *result, operand *right, iCode *ic)
+static void
+genFarFarAssign (operand * result, operand * right, iCode * ic)
{
- int size = AOP_SIZE(right);
- int offset = 0;
- char *l ;
- /* first push the right side on to the stack */
- while (size--) {
- l = aopGet(AOP(right),offset++,FALSE,FALSE);
- MOVA(l);
- emitcode ("push","acc");
+ int size = AOP_SIZE (right);
+ int offset = 0;
+ char *l;
+
+ D(emitcode ("; genFarFarAssign",""));
+
+ /* first push the right side on to the stack */
+ while (size--)
+ {
+ l = aopGet (AOP (right), offset++, FALSE, FALSE);
+ MOVA (l);
+ emitcode ("push", "acc");
}
-
- freeAsmop(right,NULL,ic,FALSE);
- /* now assign DPTR to result */
- aopOp(result,ic,FALSE);
- size = AOP_SIZE(result);
- while (size--) {
- emitcode ("pop","acc");
- aopPut(AOP(result),"a",--offset);
+
+ freeAsmop (right, NULL, ic, FALSE);
+ /* now assign DPTR to result */
+ aopOp (result, ic, FALSE);
+ size = AOP_SIZE (result);
+ while (size--)
+ {
+ emitcode ("pop", "acc");
+ aopPut (AOP (result), "a", --offset, isOperandVolatile (result, FALSE));
}
- freeAsmop(result,NULL,ic,FALSE);
-
+ freeAsmop (result, NULL, ic, FALSE);
+
}
/*-----------------------------------------------------------------*/
/* genAssign - generate code for assignment */
/*-----------------------------------------------------------------*/
-static void genAssign (iCode *ic)
+static void
+genAssign (iCode * ic)
{
- operand *result, *right;
- int size, offset ;
- unsigned long lit = 0L;
+ operand *result, *right;
+ int size, offset;
+ unsigned long lit = 0L;
- result = IC_RESULT(ic);
- right = IC_RIGHT(ic) ;
+ D(emitcode("; genAssign",""));
- /* if they are the same */
- if (operandsEqu (IC_RESULT(ic),IC_RIGHT(ic)))
- return ;
+ result = IC_RESULT (ic);
+ right = IC_RIGHT (ic);
- aopOp(right,ic,FALSE);
-
- /* special case both in far space */
- if (AOP_TYPE(right) == AOP_DPTR &&
- IS_TRUE_SYMOP(result) &&
- isOperandInFarSpace(result)) {
+ /* if they are the same */
+ if (operandsEqu (result, right) &&
+ !isOperandVolatile (result, FALSE) &&
+ !isOperandVolatile (right, FALSE))
+ return;
+
+ aopOp (right, ic, FALSE);
- genFarFarAssign (result,right,ic);
- return ;
+ /* special case both in far space */
+ if (AOP_TYPE (right) == AOP_DPTR &&
+ IS_TRUE_SYMOP (result) &&
+ isOperandInFarSpace (result))
+ {
+
+ genFarFarAssign (result, right, ic);
+ return;
}
- aopOp(result,ic,TRUE);
+ aopOp (result, ic, TRUE);
- /* if they are the same registers */
- if (sameRegs(AOP(right),AOP(result)))
- goto release;
+ /* if they are the same registers */
+ if (sameRegs (AOP (right), AOP (result)) &&
+ !isOperandVolatile (result, FALSE) &&
+ !isOperandVolatile (right, FALSE))
+ goto release;
- /* if the result is a bit */
- if (AOP_TYPE(result) == AOP_CRY) {
+ /* if the result is a bit */
+ if (AOP_TYPE (result) == AOP_CRY)
+ {
- /* if the right size is a literal then
- we know what the value is */
- if (AOP_TYPE(right) == AOP_LIT) {
- if (((int) operandLitValue(right)))
- aopPut(AOP(result),one,0);
- else
- aopPut(AOP(result),zero,0);
- goto release;
- }
+ /* if the right size is a literal then
+ we know what the value is */
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (((int) operandLitValue (right)))
+ aopPut (AOP (result), one, 0, isOperandVolatile (result, FALSE));
+ else
+ aopPut (AOP (result), zero, 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
- /* the right is also a bit variable */
- if (AOP_TYPE(right) == AOP_CRY) {
- emitcode("mov","c,%s",AOP(right)->aopu.aop_dir);
- aopPut(AOP(result),"c",0);
- goto release ;
- }
+ /* the right is also a bit variable */
+ if (AOP_TYPE (right) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", AOP (right)->aopu.aop_dir);
+ aopPut (AOP (result), "c", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
- /* we need to or */
- toBoolean(right);
- aopPut(AOP(result),"a",0);
- goto release ;
- }
-
- /* bit variables done */
- /* general case */
- size = AOP_SIZE(result);
- offset = 0 ;
- if(AOP_TYPE(right) == AOP_LIT)
- lit = (unsigned long)floatFromVal(AOP(right)->aopu.aop_lit);
- if((size > 1) &&
- (AOP_TYPE(result) != AOP_REG) &&
- (AOP_TYPE(right) == AOP_LIT) &&
- !IS_FLOAT(operandType(right)) &&
- (lit < 256L)){
- emitcode("clr","a");
- while (size--) {
- if((unsigned int)((lit >> (size*8)) & 0x0FFL)== 0)
- aopPut(AOP(result),"a",size);
- else
- aopPut(AOP(result),
- aopGet(AOP(right),size,FALSE,FALSE),
- size);
+ /* we need to or */
+ toBoolean (right);
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
+
+ /* bit variables done */
+ /* general case */
+ size = AOP_SIZE (result);
+ offset = 0;
+ if (AOP_TYPE (right) == AOP_LIT)
+ lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit);
+ if ((size > 1) &&
+ (AOP_TYPE (result) != AOP_REG) &&
+ (AOP_TYPE (right) == AOP_LIT) &&
+ !IS_FLOAT (operandType (right)) &&
+ (lit < 256L))
+ {
+ emitcode ("clr", "a");
+ while (size--)
+ {
+ if ((unsigned int) ((lit >> (size * 8)) & 0x0FFL) == 0)
+ aopPut (AOP (result), "a", size, isOperandVolatile (result, FALSE));
+ else
+ aopPut (AOP (result),
+ aopGet (AOP (right), size, FALSE, FALSE),
+ size,
+ isOperandVolatile (result, FALSE));
}
- } else {
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
+ }
+ else
+ {
+ while (size--)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ offset++;
}
}
-
+
release:
- freeAsmop (right,NULL,ic,FALSE);
- freeAsmop (result,NULL,ic,TRUE);
-}
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
/*-----------------------------------------------------------------*/
/* genJumpTab - genrates code for jump table */
/*-----------------------------------------------------------------*/
-static void genJumpTab (iCode *ic)
+static void
+genJumpTab (iCode * ic)
{
- symbol *jtab;
- char *l;
+ symbol *jtab;
+ char *l;
- aopOp(IC_JTCOND(ic),ic,FALSE);
- /* get the condition into accumulator */
- l = aopGet(AOP(IC_JTCOND(ic)),0,FALSE,FALSE);
- MOVA(l);
- /* multiply by three */
- emitcode("add","a,acc");
- emitcode("add","a,%s",aopGet(AOP(IC_JTCOND(ic)),0,FALSE,FALSE));
- freeAsmop(IC_JTCOND(ic),NULL,ic,TRUE);
+ D(emitcode ("; genJumpTab",""));
- jtab = newiTempLabel(NULL);
- emitcode("mov","dptr,#%05d$",jtab->key+100);
- emitcode("jmp","@a+dptr");
- emitcode("","%05d$:",jtab->key+100);
- /* now generate the jump labels */
- for (jtab = setFirstItem(IC_JTLABELS(ic)) ; jtab;
- jtab = setNextItem(IC_JTLABELS(ic)))
- emitcode("ljmp","%05d$",jtab->key+100);
+ aopOp (IC_JTCOND (ic), ic, FALSE);
+ /* get the condition into accumulator */
+ l = aopGet (AOP (IC_JTCOND (ic)), 0, FALSE, FALSE);
+ MOVA (l);
+ /* multiply by three */
+ emitcode ("add", "a,acc");
+ emitcode ("add", "a,%s", aopGet (AOP (IC_JTCOND (ic)), 0, FALSE, FALSE));
+ freeAsmop (IC_JTCOND (ic), NULL, ic, TRUE);
+
+ jtab = newiTempLabel (NULL);
+ emitcode ("mov", "dptr,#%05d$", jtab->key + 100);
+ emitcode ("jmp", "@a+dptr");
+ emitcode ("", "%05d$:", jtab->key + 100);
+ /* now generate the jump labels */
+ for (jtab = setFirstItem (IC_JTLABELS (ic)); jtab;
+ jtab = setNextItem (IC_JTLABELS (ic)))
+ emitcode ("ljmp", "%05d$", jtab->key + 100);
}
/*-----------------------------------------------------------------*/
/* genCast - gen code for casting */
/*-----------------------------------------------------------------*/
-static void genCast (iCode *ic)
+static void
+genCast (iCode * ic)
{
- operand *result = IC_RESULT(ic);
- link *ctype = operandType(IC_LEFT(ic));
- operand *right = IC_RIGHT(ic);
- int size, offset ;
+ operand *result = IC_RESULT (ic);
+ sym_link *ctype = operandType (IC_LEFT (ic));
+ sym_link *rtype = operandType (IC_RIGHT (ic));
+ operand *right = IC_RIGHT (ic);
+ int size, offset;
- /* if they are equivalent then do nothing */
- if (operandsEqu(IC_RESULT(ic),IC_RIGHT(ic)))
- return ;
+ D(emitcode("; genCast",""));
- aopOp(right,ic,FALSE) ;
- aopOp(result,ic,FALSE);
+ /* if they are equivalent then do nothing */
+ if (operandsEqu (IC_RESULT (ic), IC_RIGHT (ic)))
+ return;
- /* if the result is a bit */
- if (AOP_TYPE(result) == AOP_CRY) {
- /* if the right size is a literal then
- we know what the value is */
- if (AOP_TYPE(right) == AOP_LIT) {
- if (((int) operandLitValue(right)))
- aopPut(AOP(result),one,0);
- else
- aopPut(AOP(result),zero,0);
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, FALSE);
- goto release;
- }
+ /* if the result is a bit (and not a bitfield) */
+ // if (AOP_TYPE (result) == AOP_CRY)
+ if (IS_BITVAR (OP_SYMBOL (result)->type)
+ && !IS_BITFIELD (OP_SYMBOL (result)->type) )
+ {
+ /* if the right size is a literal then
+ we know what the value is */
+ if (AOP_TYPE (right) == AOP_LIT)
+ {
+ if (((int) operandLitValue (right)))
+ aopPut (AOP (result), one, 0, isOperandVolatile (result, FALSE));
+ else
+ aopPut (AOP (result), zero, 0, isOperandVolatile (result, FALSE));
- /* the right is also a bit variable */
- if (AOP_TYPE(right) == AOP_CRY) {
- emitcode("mov","c,%s",AOP(right)->aopu.aop_dir);
- aopPut(AOP(result),"c",0);
- goto release ;
- }
+ goto release;
+ }
+
+ /* the right is also a bit variable */
+ if (AOP_TYPE (right) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", AOP (right)->aopu.aop_dir);
+ aopPut (AOP (result), "c", 0, isOperandVolatile (result, FALSE));
+ goto release;
+ }
- /* we need to or */
- toBoolean(right);
- aopPut(AOP(result),"a",0);
- goto release ;
+ /* we need to or */
+ toBoolean (right);
+ aopPut (AOP (result), "a", 0, isOperandVolatile (result, FALSE));
+ goto release;
}
- /* if they are the same size : or less */
- if (AOP_SIZE(result) <= AOP_SIZE(right)) {
- /* if they are in the same place */
- if (sameRegs(AOP(right),AOP(result)))
- goto release;
+ /* if they are the same size : or less */
+ if (AOP_SIZE (result) <= AOP_SIZE (right))
+ {
- /* if they in different places then copy */
- size = AOP_SIZE(result);
- offset = 0 ;
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
- }
- goto release;
+ /* if they are in the same place */
+ if (sameRegs (AOP (right), AOP (result)))
+ goto release;
+
+ /* if they in different places then copy */
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ offset++;
+ }
+ goto release;
}
- /* if the result is of type pointer */
- if (IS_PTR(ctype)) {
+ /* if the result is of type pointer */
+ if (IS_PTR (ctype))
+ {
- int p_type;
- link *type = operandType(right);
- link *etype = getSpec(type);
+ int p_type;
+ sym_link *type = operandType (right);
+ sym_link *etype = getSpec (type);
- /* pointer to generic pointer */
- if (IS_GENPTR(ctype)) {
- char *l = zero;
-
- if (IS_PTR(type))
- p_type = DCL_TYPE(type);
- else {
+ /* pointer to generic pointer */
+ if (IS_GENPTR (ctype))
+ {
+ if (IS_PTR (type))
+ p_type = DCL_TYPE (type);
+ else
+ {
+ if (SPEC_SCLS(etype)==S_REGISTER) {
+ // let's assume it is a generic pointer
+ p_type=GPOINTER;
+ } else {
/* we have to go by the storage class */
- p_type = PTR_TYPE(SPEC_OCLS(etype));
-
-/* if (SPEC_OCLS(etype)->codesp ) */
-/* p_type = CPOINTER ; */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && !SPEC_OCLS(etype)->paged) */
-/* p_type = FPOINTER ; */
-/* else */
-/* if (SPEC_OCLS(etype)->fmap && SPEC_OCLS(etype)->paged) */
-/* p_type = PPOINTER; */
-/* else */
-/* if (SPEC_OCLS(etype) == idata ) */
-/* p_type = IPOINTER ; */
-/* else */
-/* p_type = POINTER ; */
- }
-
- /* the first two bytes are known */
- size = GPTRSIZE - 1;
- offset = 0 ;
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
+ p_type = PTR_TYPE (SPEC_OCLS (etype));
+ }
}
- /* the last byte depending on type */
- switch (p_type) {
- case IPOINTER:
- case POINTER:
- l = zero;
- break;
- case FPOINTER:
- l = one;
- break;
- case CPOINTER:
- l = "#0x02";
- break;
- case PPOINTER:
- l = "#0x03";
- break;
-
- default:
- /* this should never happen */
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "got unknown pointer type");
- exit(1);
+
+ /* the first two bytes are known */
+ size = GPTRSIZE - 1;
+ offset = 0;
+ while (size--)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ offset++;
}
- aopPut(AOP(result),l, GPTRSIZE - 1);
- goto release ;
- }
-
- /* just copy the pointers */
- size = AOP_SIZE(result);
- offset = 0 ;
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
+ /* the last byte depending on type */
+ {
+ int gpVal = pointerTypeToGPByte(p_type, NULL, NULL);
+ char gpValStr[10];
+
+ if (gpVal == -1)
+ {
+ // pointerTypeToGPByte will have bitched.
+ exit(1);
+ }
+
+ sprintf(gpValStr, "#0x%d", gpVal);
+ aopPut (AOP (result), gpValStr, GPTRSIZE - 1, isOperandVolatile (result, FALSE));
+ }
+ goto release;
}
- goto release ;
+
+ /* just copy the pointers */
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ offset++;
+ }
+ goto release;
}
-
- /* so we now know that the size of destination is greater
- than the size of the source */
- /* we move to result for the size of source */
- size = AOP_SIZE(right);
- offset = 0 ;
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
- }
-
- /* now depending on the sign of the destination */
- size = AOP_SIZE(result) - AOP_SIZE(right);
- /* if unsigned or not an integral type */
- if (SPEC_USIGN(ctype) || !IS_SPEC(ctype)) {
- while (size--)
- aopPut(AOP(result),zero,offset++);
- } else {
- /* we need to extend the sign :{ */
- char *l = aopGet(AOP(right),AOP_SIZE(right) - 1,
- FALSE,FALSE);
- MOVA(l);
- emitcode("rlc","a");
- emitcode("subb","a,acc");
- while (size--)
- aopPut(AOP(result),"a",offset++);
+
+ /* so we now know that the size of destination is greater
+ than the size of the source */
+ /* we move to result for the size of source */
+ size = AOP_SIZE (right);
+ offset = 0;
+ while (size--)
+ {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset, FALSE, FALSE),
+ offset,
+ isOperandVolatile (result, FALSE));
+ offset++;
+ }
+
+ /* now depending on the sign of the source && destination */
+ size = AOP_SIZE (result) - AOP_SIZE (right);
+ /* if unsigned or not an integral type */
+ if (!IS_SPEC (rtype) || SPEC_USIGN (rtype) || AOP_TYPE(right)==AOP_CRY)
+ {
+ while (size--)
+ aopPut (AOP (result), zero, offset++, isOperandVolatile (result, FALSE));
+ }
+ else
+ {
+ /* we need to extend the sign :{ */
+ char *l = aopGet (AOP (right), AOP_SIZE (right) - 1,
+ FALSE, FALSE);
+ MOVA (l);
+ emitcode ("rlc", "a");
+ emitcode ("subb", "a,acc");
+ while (size--)
+ aopPut (AOP (result), "a", offset++, isOperandVolatile (result, FALSE));
}
- /* we are done hurray !!!! */
+ /* we are done hurray !!!! */
release:
- freeAsmop(right,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genDjnz - generate decrement & jump if not zero instrucion */
/*-----------------------------------------------------------------*/
-static int genDjnz (iCode *ic, iCode *ifx)
+static int
+genDjnz (iCode * ic, iCode * ifx)
{
- symbol *lbl, *lbl1;
- if (!ifx)
- return 0;
-
- /* if the if condition has a false label
- then we cannot save */
- if (IC_FALSE(ifx))
- return 0;
+ symbol *lbl, *lbl1;
+ if (!ifx)
+ return 0;
- /* if the minus is not of the form
- a = a - 1 */
- if (!isOperandEqual(IC_RESULT(ic),IC_LEFT(ic)) ||
- !IS_OP_LITERAL(IC_RIGHT(ic)))
- return 0;
+ D(emitcode ("; genDjnz",""));
- if (operandLitValue(IC_RIGHT(ic)) != 1)
- return 0;
+ /* if the if condition has a false label
+ then we cannot save */
+ if (IC_FALSE (ifx))
+ return 0;
- /* if the size of this greater than one then no
- saving */
- if (getSize(operandType(IC_RESULT(ic))) > 1)
- return 0;
+ /* if the minus is not of the form
+ a = a - 1 */
+ if (!isOperandEqual (IC_RESULT (ic), IC_LEFT (ic)) ||
+ !IS_OP_LITERAL (IC_RIGHT (ic)))
+ return 0;
- /* otherwise we can save BIG */
- lbl = newiTempLabel(NULL);
- lbl1= newiTempLabel(NULL);
+ if (operandLitValue (IC_RIGHT (ic)) != 1)
+ return 0;
- aopOp(IC_RESULT(ic),ic,FALSE);
-
- if (IS_AOP_PREG(IC_RESULT(ic))) {
- emitcode("dec","%s",
- aopGet(AOP(IC_RESULT(ic)),0,FALSE,FALSE));
- emitcode("mov","a,%s",aopGet(AOP(IC_RESULT(ic)),0,FALSE,FALSE));
- emitcode("jnz","%05d$",lbl->key+100);
- } else {
- emitcode ("djnz","%s,%05d$",aopGet(AOP(IC_RESULT(ic)),0,FALSE,FALSE),
- lbl->key+100);
- }
- emitcode ("sjmp","%05d$",lbl1->key+100);
- emitcode ("","%05d$:",lbl->key+100);
- emitcode ("ljmp","%05d$",IC_TRUE(ifx)->key+100);
- emitcode ("","%05d$:",lbl1->key+100);
-
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
- ifx->generated = 1;
- return 1;
+ /* if the size of this greater than one then no
+ saving */
+ if (getSize (operandType (IC_RESULT (ic))) > 1)
+ return 0;
+
+ /* otherwise we can save BIG */
+ lbl = newiTempLabel (NULL);
+ lbl1 = newiTempLabel (NULL);
+
+ aopOp (IC_RESULT (ic), ic, FALSE);
+
+ if (AOP_NEEDSACC(IC_RESULT(ic)))
+ {
+ /* If the result is accessed indirectly via
+ * the accumulator, we must explicitly write
+ * it back after the decrement.
+ */
+ char *rByte = aopGet(AOP(IC_RESULT(ic)), 0, FALSE, FALSE);
+
+ if (strcmp(rByte, "a"))
+ {
+ /* Something is hopelessly wrong */
+ fprintf(stderr, "*** warning: internal error at %s:%d\n",
+ __FILE__, __LINE__);
+ /* We can just give up; the generated code will be inefficient,
+ * but what the hey.
+ */
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+ return 0;
+ }
+ emitcode ("dec", "%s", rByte);
+ aopPut(AOP(IC_RESULT(ic)), rByte, 0, isOperandVolatile (IC_RESULT (ic), FALSE));
+ emitcode ("jnz", "%05d$", lbl->key + 100);
+ }
+ else if (IS_AOP_PREG (IC_RESULT (ic)))
+ {
+ emitcode ("dec", "%s",
+ aopGet (AOP (IC_RESULT (ic)), 0, FALSE, FALSE));
+ emitcode ("mov", "a,%s", aopGet (AOP (IC_RESULT (ic)), 0, FALSE, FALSE));
+ emitcode ("jnz", "%05d$", lbl->key + 100);
+ }
+ else
+ {
+ emitcode ("djnz", "%s,%05d$", aopGet (AOP (IC_RESULT (ic)), 0, FALSE, FALSE),
+ lbl->key + 100);
+ }
+ emitcode ("sjmp", "%05d$", lbl1->key + 100);
+ emitcode ("", "%05d$:", lbl->key + 100);
+ emitcode ("ljmp", "%05d$", IC_TRUE (ifx)->key + 100);
+ emitcode ("", "%05d$:", lbl1->key + 100);
+
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+ ifx->generated = 1;
+ return 1;
}
/*-----------------------------------------------------------------*/
/* genReceive - generate code for a receive iCode */
/*-----------------------------------------------------------------*/
-static void genReceive (iCode *ic)
-{
- if (isOperandInFarSpace(IC_RESULT(ic)) &&
- ( OP_SYMBOL(IC_RESULT(ic))->isspilt ||
- IS_TRUE_SYMOP(IC_RESULT(ic))) ) {
-
- int size = getSize(operandType(IC_RESULT(ic)));
- int offset = fReturnSize - size;
- while (size--) {
- emitcode ("push","%s", (strcmp(fReturn[fReturnSize - offset - 1],"a") ?
- fReturn[fReturnSize - offset - 1] : "acc"));
+static void
+genReceive (iCode * ic)
+{
+ int size = getSize (operandType (IC_RESULT (ic)));
+ int offset = 0;
+ D(emitcode ("; genReceive",""));
+
+ if (ic->argreg == 1) { /* first parameter */
+ if (isOperandInFarSpace (IC_RESULT (ic)) &&
+ (OP_SYMBOL (IC_RESULT (ic))->isspilt ||
+ IS_TRUE_SYMOP (IC_RESULT (ic)))) {
+
+ offset = fReturnSizeMCS51 - size;
+ while (size--) {
+ emitcode ("push", "%s", (strcmp (fReturn[fReturnSizeMCS51 - offset - 1], "a") ?
+ fReturn[fReturnSizeMCS51 - offset - 1] : "acc"));
+ offset++;
+ }
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ size = AOP_SIZE (IC_RESULT (ic));
+ offset = 0;
+ while (size--) {
+ emitcode ("pop", "acc");
+ aopPut (AOP (IC_RESULT (ic)), "a", offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+
+ } else {
+ _G.accInUse++;
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ _G.accInUse--;
+ assignResultValue (IC_RESULT (ic));
+ }
+ } else { /* second receive onwards */
+ int rb1off ;
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ rb1off = ic->argreg;
+ while (size--) {
+ aopPut (AOP (IC_RESULT (ic)), rb1regs[rb1off++ -5], offset++, isOperandVolatile (IC_RESULT (ic), FALSE));
+ }
+ }
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genDummyRead - generate code for dummy read of volatiles */
+/*-----------------------------------------------------------------*/
+static void
+genDummyRead (iCode * ic)
+{
+ operand *op;
+ int size, offset;
+
+ D(emitcode("; genDummyRead",""));
+
+ op = IC_RIGHT (ic);
+ if (op && IS_SYMOP (op))
+ {
+ aopOp (op, ic, FALSE);
+
+ /* if the result is a bit */
+ if (AOP_TYPE (op) == AOP_CRY)
+ emitcode ("mov", "c,%s", AOP (op)->aopu.aop_dir);
+ else
+ {
+ /* bit variables done */
+ /* general case */
+ size = AOP_SIZE (op);
+ offset = 0;
+ while (size--)
+ {
+ MOVA (aopGet (AOP (op), offset, FALSE, FALSE));
offset++;
+ }
}
- aopOp(IC_RESULT(ic),ic,FALSE);
- size = AOP_SIZE(IC_RESULT(ic));
- offset = 0;
- while (size--) {
- emitcode ("pop","acc");
- aopPut (AOP(IC_RESULT(ic)),"a",offset++);
- }
-
- } else {
- _G.accInUse++;
- aopOp(IC_RESULT(ic),ic,FALSE);
- _G.accInUse--;
- assignResultValue(IC_RESULT(ic));
+
+ freeAsmop (op, NULL, ic, TRUE);
}
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
+ op = IC_LEFT (ic);
+ if (op && IS_SYMOP (op))
+ {
+ aopOp (op, ic, FALSE);
+
+ /* if the result is a bit */
+ if (AOP_TYPE (op) == AOP_CRY)
+ emitcode ("mov", "c,%s", AOP (op)->aopu.aop_dir);
+ else
+ {
+ /* bit variables done */
+ /* general case */
+ size = AOP_SIZE (op);
+ offset = 0;
+ while (size--)
+ {
+ MOVA (aopGet (AOP (op), offset, FALSE, FALSE));
+ offset++;
+ }
+ }
+
+ freeAsmop (op, NULL, ic, TRUE);
+ }
}
/*-----------------------------------------------------------------*/
-/* gen51Code - generate code for 8051 based controllers */
+/* genCritical - generate code for start of a critical sequence */
/*-----------------------------------------------------------------*/
-void gen51Code (iCode *lic)
+static void
+genCritical (iCode *ic)
{
- iCode *ic;
- int cln = 0;
+ symbol *tlbl = newiTempLabel (NULL);
+
+ D(emitcode("; genCritical",""));
+
+ if (IC_RESULT (ic))
+ aopOp (IC_RESULT (ic), ic, TRUE);
+
+ emitcode ("setb", "c");
+ emitcode ("jbc", "ea,%05d$", (tlbl->key + 100)); /* atomic test & clear */
+ emitcode ("clr", "c");
+ emitcode ("", "%05d$:", (tlbl->key + 100));
+
+ if (IC_RESULT (ic))
+ outBitC (IC_RESULT (ic)); /* save old ea in an operand */
+ else
+ emitcode ("push", "psw"); /* save old ea via c in psw on top of stack*/
+
+ if (IC_RESULT (ic))
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+}
- /* Hack-o-matic: change fReturn based on model. */
- if (options.model == MODEL_FLAT24)
+/*-----------------------------------------------------------------*/
+/* genEndCritical - generate code for end of a critical sequence */
+/*-----------------------------------------------------------------*/
+static void
+genEndCritical (iCode *ic)
+{
+ D(emitcode("; genEndCritical",""));
+
+ if (IC_RIGHT (ic))
+ {
+ aopOp (IC_RIGHT (ic), ic, FALSE);
+ if (AOP_TYPE (IC_RIGHT (ic)) == AOP_CRY)
+ {
+ emitcode ("mov", "c,%s", IC_RIGHT (ic)->aop->aopu.aop_dir);
+ emitcode ("mov", "ea,c");
+ }
+ else
+ {
+ MOVA (aopGet (AOP (IC_RIGHT (ic)), 0, FALSE, FALSE));
+ emitcode ("rrc", "a");
+ emitcode ("mov", "ea,c");
+ }
+ freeAsmop (IC_RIGHT (ic), NULL, ic, TRUE);
+ }
+ else
{
- fReturn = fReturn390;
- fReturnSize = 5;
+ emitcode ("pop", "psw"); /* restore ea via c in psw on top of stack */
+ emitcode ("mov", "ea,c");
}
+}
- lineHead = lineCurr = NULL;
- /* if debug information required */
-/* if (options.debug && currFunc) { */
- if (currFunc) {
- cdbSymbol(currFunc,cdbFile,FALSE,TRUE);
- _G.debugLine = 1;
- if (IS_STATIC(currFunc->etype))
- emitcode("","F%s$%s$0$0 ==.",moduleName,currFunc->name);
- else
- emitcode("","G$%s$0$0 ==.",currFunc->name);
- _G.debugLine = 0;
- }
- /* stack pointer name */
- if (options.useXstack)
- spname = "_spx";
- else
- spname = "sp";
-
-
- for (ic = lic ; ic ; ic = ic->next ) {
-
- if ( cln != ic->lineno ) {
- if ( options.debug ) {
- _G.debugLine = 1;
- emitcode("","C$%s$%d$%d$%d ==.",
- ic->filename,ic->lineno,
- ic->level,ic->block);
- _G.debugLine = 0;
+/*-----------------------------------------------------------------*/
+/* gen51Code - generate code for 8051 based controllers */
+/*-----------------------------------------------------------------*/
+void
+gen51Code (iCode * lic)
+{
+ iCode *ic;
+ int cln = 0;
+
+ lineHead = lineCurr = NULL;
+
+ /* print the allocation information */
+ if (allocInfo && currFunc)
+ printAllocInfo (currFunc, codeOutFile);
+ /* if debug information required */
+ if (options.debug && currFunc)
+ {
+ debugFile->writeFunction(currFunc);
+ _G.debugLine = 1;
+ if (IS_STATIC (currFunc->etype))
+ emitcode ("", "F%s$%s$0$0 ==.", moduleName, currFunc->name);
+ else
+ emitcode ("", "G$%s$0$0 ==.", currFunc->name);
+ _G.debugLine = 0;
+ }
+ /* stack pointer name */
+ if (options.useXstack)
+ spname = "_spx";
+ else
+ spname = "sp";
+
+
+ for (ic = lic; ic; ic = ic->next)
+ {
+ _G.current_iCode = ic;
+
+ if (ic->lineno && cln != ic->lineno)
+ {
+ if (options.debug)
+ {
+ _G.debugLine = 1;
+ emitcode ("", "C$%s$%d$%d$%d ==.",
+ FileBaseName (ic->filename), ic->lineno,
+ ic->level, ic->block);
+ _G.debugLine = 0;
}
- emitcode(";","%s %d",ic->filename,ic->lineno);
- cln = ic->lineno ;
- }
- /* if the result is marked as
- spilt and rematerializable or code for
- this has already been generated then
- do nothing */
- if (resultRemat(ic) || ic->generated )
- continue ;
-
- /* depending on the operation */
- switch (ic->op) {
- case '!' :
- genNot(ic);
- break;
-
- case '~' :
- genCpl(ic);
- break;
-
+ if (!options.noCcodeInAsm) {
+ emitcode ("", ";%s:%d: %s", ic->filename, ic->lineno,
+ printCLine(ic->filename, ic->lineno));
+ }
+ cln = ic->lineno;
+ }
+ if (options.iCodeInAsm) {
+ char regsInUse[80];
+ int i;
+
+ for (i=0; i<8; i++) {
+ sprintf (®sInUse[i],
+ "%c", ic->riu & (1<<i) ? i+'0' : '-');
+ }
+ regsInUse[i]=0;
+ emitcode("", "; [%s] ic:%d: %s", regsInUse, ic->seq, printILine(ic));
+ }
+ /* if the result is marked as
+ spilt and rematerializable or code for
+ this has already been generated then
+ do nothing */
+ if (resultRemat (ic) || ic->generated)
+ continue;
+
+ /* depending on the operation */
+ switch (ic->op)
+ {
+ case '!':
+ genNot (ic);
+ break;
+
+ case '~':
+ genCpl (ic);
+ break;
+
case UNARYMINUS:
- genUminus (ic);
- break;
-
+ genUminus (ic);
+ break;
+
case IPUSH:
- genIpush (ic);
- break;
-
+ genIpush (ic);
+ break;
+
case IPOP:
- /* IPOP happens only when trying to restore a
- spilt live range, if there is an ifx statement
- following this pop then the if statement might
- be using some of the registers being popped which
- would destory the contents of the register so
- we need to check for this condition and handle it */
- if (ic->next &&
- ic->next->op == IFX &&
- regsInCommon(IC_LEFT(ic),IC_COND(ic->next)))
- genIfx (ic->next,ic);
- else
- genIpop (ic);
- break;
-
+ /* IPOP happens only when trying to restore a
+ spilt live range, if there is an ifx statement
+ following this pop then the if statement might
+ be using some of the registers being popped which
+ would destory the contents of the register so
+ we need to check for this condition and handle it */
+ if (ic->next &&
+ ic->next->op == IFX &&
+ regsInCommon (IC_LEFT (ic), IC_COND (ic->next)))
+ genIfx (ic->next, ic);
+ else
+ genIpop (ic);
+ break;
+
case CALL:
- genCall (ic);
- break;
-
+ genCall (ic);
+ break;
+
case PCALL:
- genPcall (ic);
- break;
-
+ genPcall (ic);
+ break;
+
case FUNCTION:
- genFunction (ic);
- break;
-
+ genFunction (ic);
+ break;
+
case ENDFUNCTION:
- genEndFunction (ic);
- break;
-
+ genEndFunction (ic);
+ break;
+
case RETURN:
- genRet (ic);
- break;
-
+ genRet (ic);
+ break;
+
case LABEL:
- genLabel (ic);
- break;
-
+ genLabel (ic);
+ break;
+
case GOTO:
- genGoto (ic);
- break;
-
- case '+' :
- genPlus (ic) ;
- break;
-
- case '-' :
- if ( ! genDjnz (ic,ifxForOp(IC_RESULT(ic),ic)))
- genMinus (ic);
- break;
-
- case '*' :
- genMult (ic);
- break;
-
- case '/' :
- genDiv (ic) ;
- break;
-
- case '%' :
- genMod (ic);
- break;
-
- case '>' :
- genCmpGt (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
- case '<' :
- genCmpLt (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
+ genGoto (ic);
+ break;
+
+ case '+':
+ genPlus (ic);
+ break;
+
+ case '-':
+ if (!genDjnz (ic, ifxForOp (IC_RESULT (ic), ic)))
+ genMinus (ic);
+ break;
+
+ case '*':
+ genMult (ic);
+ break;
+
+ case '/':
+ genDiv (ic);
+ break;
+
+ case '%':
+ genMod (ic);
+ break;
+
+ case '>':
+ genCmpGt (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case '<':
+ genCmpLt (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
case LE_OP:
case GE_OP:
case NE_OP:
-
- /* note these two are xlated by algebraic equivalence
- during parsing SDCC.y */
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "got '>=' or '<=' shouldn't have come here");
- break;
-
+
+ /* note these two are xlated by algebraic equivalence
+ during parsing SDCC.y */
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "got '>=' or '<=' shouldn't have come here");
+ break;
+
case EQ_OP:
- genCmpEq (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
+ genCmpEq (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
case AND_OP:
- genAndOp (ic);
- break;
-
+ genAndOp (ic);
+ break;
+
case OR_OP:
- genOrOp (ic);
- break;
-
- case '^' :
- genXor (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
- case '|' :
- genOr (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
+ genOrOp (ic);
+ break;
+
+ case '^':
+ genXor (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case '|':
+ genOr (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
case BITWISEAND:
- genAnd (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
+ genAnd (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
case INLINEASM:
- genInline (ic);
- break;
-
+ genInline (ic);
+ break;
+
case RRC:
- genRRC (ic);
- break;
-
+ genRRC (ic);
+ break;
+
case RLC:
- genRLC (ic);
- break;
-
+ genRLC (ic);
+ break;
+
case GETHBIT:
- genGetHbit (ic);
- break;
-
+ genGetHbit (ic);
+ break;
+
case LEFT_OP:
- genLeftShift (ic);
- break;
-
+ genLeftShift (ic);
+ break;
+
case RIGHT_OP:
- genRightShift (ic);
- break;
-
+ genRightShift (ic);
+ break;
+
case GET_VALUE_AT_ADDRESS:
- genPointerGet(ic);
- break;
-
- case '=' :
- if (POINTER_SET(ic))
- genPointerSet(ic);
- else
- genAssign(ic);
- break;
-
+ genPointerGet (ic, hasInc(IC_LEFT(ic),ic,getSize(operandType(IC_RESULT(ic)))));
+ break;
+
+ case '=':
+ if (POINTER_SET (ic))
+ genPointerSet (ic, hasInc (IC_RESULT(ic),ic,getSize(operandType(IC_RIGHT(ic)))));
+ else
+ genAssign (ic);
+ break;
+
case IFX:
- genIfx (ic,NULL);
- break;
-
+ genIfx (ic, NULL);
+ break;
+
case ADDRESS_OF:
- genAddrOf (ic);
- break;
-
+ genAddrOf (ic);
+ break;
+
case JUMPTABLE:
- genJumpTab (ic);
- break;
-
+ genJumpTab (ic);
+ break;
+
case CAST:
- genCast (ic);
- break;
-
+ genCast (ic);
+ break;
+
case RECEIVE:
- genReceive(ic);
- break;
-
+ genReceive (ic);
+ break;
+
case SEND:
- addSet(&_G.sendSet,ic);
- break;
+ addSet (&_G.sendSet, ic);
+ break;
- default :
- ic = ic;
- /* piCode(ic,stdout); */
-
- }
+ case DUMMY_READ_VOLATILE:
+ genDummyRead (ic);
+ break;
+
+ case CRITICAL:
+ genCritical (ic);
+ break;
+
+ case ENDCRITICAL:
+ genEndCritical (ic);
+ break;
+
+ case SWAP:
+ genSwap (ic);
+ break;
+
+ default:
+ ic = ic;
+ }
}
-
- /* now we are ready to call the
- peep hole optimizer */
- if (!options.nopeep)
- peepHole (&lineHead);
+ _G.current_iCode = NULL;
- /* now do the actual printing */
- printLine (lineHead,codeOutFile);
- return;
+ /* now we are ready to call the
+ peep hole optimizer */
+ if (!options.nopeep)
+ peepHole (&lineHead);
+
+ /* now do the actual printing */
+ printLine (lineHead, codeOutFile);
+ return;
}
projects / fw / sdcc / blobdiff