/*-------------------------------------------------------------------------
- avrgen.c - source file for code generation for ATMEL AVR
-
+ gen.c - source file for code generation for ATMEL AVR
+
Written By - Sandeep Dutta . sandeep.dutta@usa.net (2000)
-
+
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!
-
+
-------------------------------------------------------------------------*/
#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
-#ifndef __BORLANDC__
-#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
-#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;
-char *fReturnAVR[] = {"r16","r17","r18","r19" };
-unsigned fReturnSize = 4; /* shared with ralloc.c */
-char **fReturn = fReturnAVR;
-
-static short rbank = -1;
+char *fReturnAVR[] = { "r16", "r17", "r18", "r19" };
+unsigned fAVRReturnSize = 4; /* shared with ralloc.c */
+char **fAVRReturn = fReturnAVR;
+static char *larray[4] = { ">", "<", "hlo8", "hhi8" };
static struct {
- short xPushed;
- short zPushed;
- short accInUse;
- short inLine;
- short debugLine;
- short nRegsSaved;
- set *sendSet;
+ short xPushed;
+ short zPushed;
+ short accInUse;
+ short inLine;
+ short debugLine;
+ short nRegsSaved;
+ set *sendSet;
} _G;
-extern int avr_ptrRegReq ;
+extern int avr_ptrRegReq;
extern int avr_nRegs;
-extern FILE *codeOutFile;
-static void saverbank (int, iCode *,bool);
+extern struct dbuf_s *codeOutBuf;
#define RESULTONSTACK(x) \
(IC_RESULT(x) && IC_RESULT(x)->aop && \
IC_RESULT(x)->aop->type == AOP_STK )
#define MOVR0(x) if (strcmp(x,"r0")) emitcode("mov","r0,%s",x);
-#define CLRC emitcode("clc")
-#define SETC emitcode("stc")
-#define IS_REGIDX(a,r) (a->type == AOP_REG && aop->aopu.aop_reg[0]->rIdx == r)
+#define MOVR24(x) if (strcmp(x,"r24")) emitcode("mov","r24,%s",x);
+#define AOP_ISHIGHREG(a,n) (a->type == AOP_REG && a->aopu.aop_reg[n] && a->aopu.aop_reg[n]->rIdx >= R16_IDX)
+#define CLRC emitcode("clc","")
+#define SETC emitcode("stc","")
+#define MOVA(x)
+#define IS_REGIDX(a,r) (a->type == AOP_REG && a->aopu.aop_reg[0]->rIdx == r)
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};
-
#define LSB 0
#define MSB16 1
#define MSB24 2
#define MSB32 3
+#if 0
+// PENDING: Unused.
/*-----------------------------------------------------------------*/
-/* emitcode - writes the code into a file : for now it is simple */
+/* reAdjustPreg - points a register back to where it should */
/*-----------------------------------------------------------------*/
-static void emitcode (char *inst,char *fmt, ...)
+static void
+reAdjustPreg (asmop * aop)
{
- va_list ap;
- char lb[MAX_INLINEASM];
- char *lbp = lb;
-
- va_start(ap,fmt);
+ int size;
+
+ aop->coff = 0;
+ if ((size = aop->size) <= 1)
+ return;
+ size--;
+ switch (aop->type) {
+ case AOP_X:
+ case AOP_Z:
+ emitcode ("sbiw", "%s,%d", aop->aopu.aop_ptr->name, size);
+ break;
+ }
- 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++;
-
- if (lbp && *lbp)
- lineCurr = (lineCurr ?
- connectLine(lineCurr,newLineNode(lb)) :
- (lineHead = newLineNode(lb)));
- lineCurr->isInline = _G.inLine;
- lineCurr->isDebug = _G.debugLine;
- va_end(ap);
}
/*-----------------------------------------------------------------*/
-/* getFreePtr - returns X or Z whichever is free or can be pushed */
+/* outBitC - output a bit C */
/*-----------------------------------------------------------------*/
-static regs *getFreePtr (iCode *ic, asmop **aopp, bool result, bool zonly)
+static void
+outBitC (operand * result)
{
- bool xiu = FALSE , ziu = FALSE;
- bool xou = FALSE , zou = FALSE;
-
- /* the logic: if x & z used in the instruction
- then we are in trouble otherwise */
-
- /* first check if x & z are used by this
- instruction, in which case we are in trouble */
- if ((xiu = bitVectBitValue(ic->rUsed,X_IDX)) &&
- (ziu = bitVectBitValue(ic->rUsed,Z_IDX)))
- {
- goto endOfWorld;
- }
-
- xou = bitVectBitValue(ic->rMask,X_IDX);
- zou = bitVectBitValue(ic->rMask,Z_IDX);
-
- /* if no usage of Z then return it */
- if (!ziu && !zou) {
- ic->rUsed = bitVectSetBit(ic->rUsed,Z_IDX);
- (*aopp)->type = AOP_Z;
-
- (*aopp)->aop_ptr2 = avr_regWithIdx(R31_IDX);
- return (*aopp)->aopu.aop_ptr = avr_regWithIdx(R30_IDX);
- }
-
- /* if no usage of X then return it */
- if (!xiu && !xou && !zonly) {
- ic->rUsed = bitVectSetBit(ic->rUsed,X_IDX);
- (*aopp)->type = AOP_X;
-
- (*aopp)->aop_ptr2 = avr_regWithIdx(R27_IDX);
- return (*aopp)->aopu.aop_ptr = avr_regWithIdx(R26_IDX);
- }
-
- /* if z not used then */
-
- if (!ziu) {
- /* push it if not already pushed */
- if (!_G.zPushed) {
- emitcode ("push","%s",
- avr_regWithIdx(R30_IDX)->dname);
- emitcode ("push","%s",
- avr_regWithIdx(R31_IDX)->dname);
- _G.zPushed++ ;
- }
-
- ic->rUsed = bitVectSetBit(ic->rUsed,Z_IDX);
- (*aopp)->type = AOP_Z;
- (*aopp)->aop_ptr2 = avr_regWithIdx(R31_IDX);
- return (*aopp)->aopu.aop_ptr = avr_regWithIdx(R30_IDX);
- }
-
- /* now we know they both have usage */
- /* if x not used in this instruction */
- if (!xiu && !zonly) {
- /* push it if not already pushed */
- if (!_G.xPushed) {
- emitcode ("push","%s",
- avr_regWithIdx(R26_IDX)->dname);
- emitcode ("push","%s",
- avr_regWithIdx(R27_IDX)->dname);
- _G.xPushed++ ;
- }
-
- ic->rUsed = bitVectSetBit(ic->rUsed,X_IDX);
- (*aopp)->type = AOP_X;
-
- (*aopp)->aop_ptr2 = avr_regWithIdx(R27_IDX);
- return (*aopp)->aopu.aop_ptr = avr_regWithIdx(R26_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;
- }
-
- 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);
+ emitcode ("clr", "r0");
+ emitcode ("rol", "r0");
+ outAcc (result);
}
/*-----------------------------------------------------------------*/
-/* newAsmop - creates a new asmOp */
+/* inExcludeList - return 1 if the string is in exclude Reg list */
/*-----------------------------------------------------------------*/
-static asmop *newAsmop (short type)
+static bool
+inExcludeList (char *s)
{
- asmop *aop;
+ int i = 0;
+
+ if (options.excludeRegs[i] &&
+ STRCASECMP (options.excludeRegs[i], "none") == 0)
+ return FALSE;
- ALLOC(aop,sizeof(asmop));
- aop->type = type;
- return aop;
+ for (i = 0; options.excludeRegs[i]; i++) {
+ if (options.excludeRegs[i] &&
+ STRCASECMP (s, options.excludeRegs[i]) == 0)
+ return TRUE;
+ }
+ return FALSE;
}
/*-----------------------------------------------------------------*/
-/* pointerCode - returns the code for a pointer type */
+/* 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 int pointerCode (link *etype)
+static int
+findLabelBackwards (iCode * ic, int key)
{
+ int count = 0;
- return PTR_TYPE(SPEC_OCLS(etype));
+ while (ic->prev) {
+ ic = ic->prev;
+ count++;
+
+ if (ic->op == LABEL && IC_LABEL (ic)->key == key) {
+ /* printf("findLabelBackwards = %d\n", count); */
+ return count;
+ }
+ }
+ return 0;
}
/*-----------------------------------------------------------------*/
-/* aopForSym - for a true symbol */
+/* addSign - complete with sign */
/*-----------------------------------------------------------------*/
-static asmop *aopForSym (iCode *ic,symbol *sym,bool result)
+static void
+addSign (operand * result, int offset, int sign)
{
- asmop *aop;
- memmap *space= SPEC_OCLS(sym->etype);
-
- /* if already has one */
- if (sym->aop)
- return sym->aop;
-
- /* assign depending on the storage class */
- /* if it is on the stack */
- if (sym->onStack) {
- sym->aop = aop = newAsmop(0);
- aop->size = getSize(sym->type);
-
- /* we can use std / ldd instruction */
- if (sym->stack > 0 && (sym->stack + getSize(sym->type) - 1) <= 63) {
- aop->type = AOP_STK_D;
- aop->aopu.aop_stk = sym->stack;
- return aop;
- }
-
- /* otherwise get a free pointer register X/Z */
- aop->aopu.aop_ptr = getFreePtr(ic,&aop,result,FALSE);
-
- /* now assign the address of the variable to
- the pointer register */
- if (aop->type != AOP_STK) {
- emitcode("movw","%s,r28",aop->aopu.aop_ptr->name);
- if (sym->stack < 0) {
- if ((sym->stack - _G.nRegsSaved) > -63) {
- emitcode("sbiw","%s,0x%02x",
- aop->aopu.aop_ptr->name,
- (sym->stack - _G.nRegsSaved));
- } else {
- emitcode("subi","%s,lo8(%d)", aop->aopu.aop_ptr->name,
- sym->stack - _G.nRegsSaved);
- emitcode("sbci","%s,hi8(%d)",aop->aop_ptr2->name,
- sym->stack - _G.nRegsSaved);
+ 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 {
- if (sym->stack <= 63) {
- emitcode("adiw","%s,0x%02x",aop->aopu.aop_ptr->name,sym->stack);
- } else {
- emitcode("subi","%s,lo8(-%d)",aop->aopu.aop_ptr->name,sym->stack);
- emitcode("sbci","%s,hi8(-%d)",aop->aop_ptr2->name,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 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;
- }
-
- /* 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;
- }
-
- /* only remaining is code / eeprom which will need pointer reg */
- /* if it is in code space */
- if (IN_CODESPACE(space))
- aop->code = 1;
-
- sym->aop = aop = newAsmop(0);
- aop->aopu.aop_ptr = getFreePtr(ic,&aop,result,aop->code);
- aop->size = getSize(sym->type);
- emitcode ("ldi","%s,lo8(%s)",aop->aopu.aop_ptr->name,sym->rname);
- emircode ("ldi","%s,hi8(%s)",aop->aop_ptr2);
-
- return aop;
+ else
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+ }
}
/*-----------------------------------------------------------------*/
-/* aopForRemat - rematerialzes an object */
+/* isLiteralBit - test if lit == 2^n */
/*-----------------------------------------------------------------*/
-static asmop *aopForRemat (symbol *sym)
+static int
+isLiteralBit (unsigned long lit)
{
- iCode *ic = sym->rematiCode;
- asmop *aop = newAsmop(AOP_IMMD);
- int val = 0;
-
- for (;;) {
- if (ic->op == '+')
- val += operandLitValue(IC_RIGHT(ic));
- else if (ic->op == '-')
- val -= operandLitValue(IC_RIGHT(ic));
- 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);
-
- ALLOC_ATOMIC(aop->aopu.aop_immd,strlen(buffer)+1);
- strcpy(aop->aopu.aop_immd,buffer);
- return aop;
+ 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;
}
/*-----------------------------------------------------------------*/
-/* regsInCommon - two operands have some registers in common */
+/* outAcc - output Acc */
/*-----------------------------------------------------------------*/
-static bool regsInCommon (operand *op1, operand *op2)
+static void
+outAcc (operand * result)
{
- symbol *sym1, *sym2;
- int i;
-
- /* if they have registers in common */
- if (!IS_SYMOP(op1) || !IS_SYMOP(op2))
- return FALSE ;
+ int size, offset;
+ size = getDataSize (result);
+ if (size) {
+ aopPut (AOP (result), "r0", 0);
+ size--;
+ offset = 1;
+ /* unsigned or positive */
+ while (size--) {
+ aopPut (AOP (result), zero, offset++);
+ }
+ }
+}
- sym1 = OP_SYMBOL(op1);
- sym2 = OP_SYMBOL(op2);
+#endif // End Unused code section
- if (sym1->nRegs == 0 || sym2->nRegs == 0)
- return FALSE ;
+/*-----------------------------------------------------------------*/
+/* emitcode - writes the code into a file : for now it is simple */
+/*-----------------------------------------------------------------*/
+static void
+emitcode (char *inst, char *fmt, ...)
+{
+ va_list ap;
+ char lb[INITIAL_INLINEASM];
+ char *lbp = lb;
- for (i = 0 ; i < sym1->nRegs ; i++) {
- int j;
- if (!sym1->regs[i])
- continue ;
+ va_start (ap, fmt);
- for (j = 0 ; j < sym2->nRegs ;j++ ) {
- if (!sym2->regs[j])
- continue ;
+ 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 ((unsigned char)*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 (sym2->regs[j] == sym1->regs[i])
- return TRUE ;
- }
- }
+/*-----------------------------------------------------------------*/
+/* avr_emitDebuggerSymbol - associate the current code location */
+/* with a debugger symbol */
+/*-----------------------------------------------------------------*/
+void
+avr_emitDebuggerSymbol (char * debugSym)
+{
+ _G.debugLine = 1;
+ emitcode ("", "%s ==.", debugSym);
+ _G.debugLine = 0;
+}
- return FALSE ;
+/*-----------------------------------------------------------------*/
+/* hasInc - operand is incremented before any other use */
+/*-----------------------------------------------------------------*/
+static iCode *
+hasInc (operand *op, iCode *ic)
+{
+ sym_link *type = operandType(op);
+ sym_link *retype = getSpec (type);
+ iCode *lic = ic->next;
+ int isize ;
+
+ if (IS_BITVAR(retype)||!IS_PTR(type)) return NULL;
+ if (IS_AGGREGATE(type->next)) return NULL;
+ isize = getSize(type->next);
+ 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) || (lic->defKey == op->key)) {
+ return NULL;
+ }
+ lic = lic->next;
+ }
+ return NULL;
}
/*-----------------------------------------------------------------*/
-/* operandsEqu - equivalent */
+/* getFreePtr - returns X or Z whichever is free or can be pushed */
/*-----------------------------------------------------------------*/
-static bool operandsEqu ( operand *op1, operand *op2)
+static regs *
+getFreePtr (iCode * ic, asmop ** aopp, bool result, bool zonly)
{
- symbol *sym1, *sym2;
+ bool xiu = FALSE, ziu = FALSE;
+ bool xou = FALSE, zou = FALSE;
+
+ /* the logic: if x & z used in the instruction
+ then we are in trouble otherwise */
- /* if they not symbols */
- if (!IS_SYMOP(op1) || !IS_SYMOP(op2))
- return FALSE;
+ /* first check if x & z are used by this
+ instruction, in which case we are in trouble */
+ if ((xiu = bitVectBitValue (ic->rUsed, X_IDX)) &&
+ (ziu = bitVectBitValue (ic->rUsed, Z_IDX))) {
+ goto endOfWorld;
+ }
- sym1 = OP_SYMBOL(op1);
- sym2 = OP_SYMBOL(op2);
+ xou = bitVectBitValue (ic->rMask, X_IDX);
+ zou = bitVectBitValue (ic->rMask, Z_IDX);
- /* 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 no usage of Z then return it */
+ if (!ziu && !zou) {
+ ic->rUsed = bitVectSetBit (ic->rUsed, Z_IDX);
+ (*aopp)->type = AOP_Z;
- /* if they are the same */
- if (sym1 == sym2)
- return TRUE ;
+ (*aopp)->aop_ptr2 = avr_regWithIdx (R31_IDX);
+ return (*aopp)->aopu.aop_ptr = avr_regWithIdx (R30_IDX);
+ }
- if (strcmp(sym1->rname,sym2->rname) == 0)
- return TRUE;
+ /* if no usage of X then return it */
+ if (!xiu && !xou && !zonly) {
+ ic->rUsed = bitVectSetBit (ic->rUsed, X_IDX);
+ (*aopp)->type = AOP_X;
+ (*aopp)->aop_ptr2 = avr_regWithIdx (R27_IDX);
+ return (*aopp)->aopu.aop_ptr = avr_regWithIdx (R26_IDX);
+ }
- /* if left is a tmp & right is not */
- if (IS_ITEMP(op1) &&
- !IS_ITEMP(op2) &&
- sym1->isspilt &&
- (sym1->usl.spillLoc == sym2))
- return TRUE;
+ /* if z not used then */
- if (IS_ITEMP(op2) &&
- !IS_ITEMP(op1) &&
- sym2->isspilt &&
- sym1->level > 0 &&
- (sym2->usl.spillLoc == sym1))
- return TRUE ;
+ if (!ziu) {
+ /* push it if not already pushed */
+ if (!_G.zPushed) {
+ emitcode ("push", "%s",
+ avr_regWithIdx (R30_IDX)->dname);
+ emitcode ("push", "%s",
+ avr_regWithIdx (R31_IDX)->dname);
+ _G.zPushed++;
+ }
- return FALSE ;
-}
+ ic->rUsed = bitVectSetBit (ic->rUsed, Z_IDX);
+ (*aopp)->type = AOP_Z;
+ (*aopp)->aop_ptr2 = avr_regWithIdx (R31_IDX);
+ return (*aopp)->aopu.aop_ptr = avr_regWithIdx (R30_IDX);
+ }
-/*-----------------------------------------------------------------*/
-/* sameRegs - two asmops have the same registers */
-/*-----------------------------------------------------------------*/
-static bool sameRegs (asmop *aop1, asmop *aop2 )
-{
- int i;
+ /* now we know they both have usage */
+ /* if x not used in this instruction */
+ if (!xiu && !zonly) {
+ /* push it if not already pushed */
+ if (!_G.xPushed) {
+ emitcode ("push", "%s",
+ avr_regWithIdx (R26_IDX)->dname);
+ emitcode ("push", "%s",
+ avr_regWithIdx (R27_IDX)->dname);
+ _G.xPushed++;
+ }
- if (aop1 == aop2)
- return TRUE ;
+ ic->rUsed = bitVectSetBit (ic->rUsed, X_IDX);
+ (*aopp)->type = AOP_X;
- if (aop1->type != AOP_REG ||
- aop2->type != AOP_REG )
- return FALSE ;
+ (*aopp)->aop_ptr2 = avr_regWithIdx (R27_IDX);
+ return (*aopp)->aopu.aop_ptr = avr_regWithIdx (R26_IDX);
+ }
- 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 ;
+ 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;
+ }
- return TRUE ;
+ /* other wise this is true end of the world */
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "getFreePtr should never reach here");
+ exit (0);
}
/*-----------------------------------------------------------------*/
-/* isRegPair - for size 2 if this operand has a register pair */
+/* newAsmop - creates a new asmOp */
/*-----------------------------------------------------------------*/
-static int isRegPair (aop *aopp)
+static asmop *
+newAsmop (short type)
{
- if (!aop || aop->size != 2) return 0;
- if (aop->type == AOP_X || aop->type == AOP_Y) return 1;
- if (aop->type != AOP_REG) return 0;
- if ((aop->aopu.aop_reg[1]->rIdx -
- aop->aopu.aop_reg[0]->rIdx) == 1) return 1;
- return 0;
+ asmop *aop;
+
+ aop = Safe_calloc (1, sizeof (asmop));
+ aop->type = type;
+ return aop;
}
/*-----------------------------------------------------------------*/
-/* aopOp - allocates an asmop for an operand : */
+/* pointerCode - returns the code for a pointer type */
/*-----------------------------------------------------------------*/
-static void aopOp (operand *op, iCode *ic, bool result)
+static int
+pointerCode (sym_link * etype)
{
- asmop *aop;
- symbol *sym;
- int i;
-
- 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 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 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 */
-
- 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 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;
- }
-
- if (sym->accuse) {
- assert("ACC_USE cannot happen in AVR\n");
- }
-
- 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;
- }
-
- /* else spill location */
- sym->aop = op->aop = aop =
- aopForSym(ic,sym->usl.spillLoc,result);
- 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];
-}
-/*-----------------------------------------------------------------*/
-/* 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_X :
- if (_G.xPushed ) {
- if (pop) {
- emitcode ("pop","r26");
- emitcode ("pop","r27");
- _G.xPushed--;
- }
- }
- bitVectUnSetBit(ic->rUsed,X_IDX);
- break;
-
- case AOP_Z :
- if (_G.zPushed ) {
- if (pop) {
- emitcode ("pop","r30");
- emitcode ("pop","r31");
- _G.zPushed--;
- }
- }
- bitVectUnSetBit(ic->rUsed,Z_IDX);
- break;
-
- case AOP_STK :
- {
- int sz = aop->size;
- int stk = aop->aopu.aop_stk + aop->size;
- bitVectUnSetBit(ic->rUsed,X_IDX);
- bitVectUnSetBit(ic->rUsed,Z_IDX);
-
- getFreePtr(ic,&aop,FALSE,0);
-
- emitcode ("movw","%s,r28");
- if (stk) {
- if (stk <= 63 && stk > 0) {
- emitcode ("adiw","%s,0x%02x",aop->aopu.aop_ptr->name,stk+1);
- } else {
- emitcode ("subi","%s,lo8(%d)",aop->aopu.aop_ptr->name,-(stk+1));
- emitcode ("sbci","%s,hi8(%d)",aop->aop_ptr2->name,-(stk+1));
- }
- }
-
- while (sz--) {
- emitcode("pop","r24");
- emitcode("st","-%s,r24",aop->type == AOP_X ? "X" : "Z");
- if (!sz) break;
- }
- op->aop = aop;
- freeAsmop(op,NULL,ic,TRUE);
- if (_G.xPushed) {
- emitcode("pop","r26");
- emitcode("pop","r27");
- _G.xPushed--;
- }
-
- if (_G.zPushed) {
- emitcode("pop","r30");
- emitcode("pop","r31");
- _G.zPushed--;
- }
- }
- }
-
-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;
- }
- }
+ return PTR_TYPE (SPEC_OCLS (etype));
+
}
/*-----------------------------------------------------------------*/
-/* aopGet - for fetching value of the aop */
+/* aopForSym - for a true symbol */
/*-----------------------------------------------------------------*/
-static char *aopGet (asmop *aop, int offset)
+static asmop *
+aopForSym (iCode * ic, symbol * sym, bool result)
{
- char *s = buffer ;
- char *rs;
+ asmop *aop;
+ memmap *space = SPEC_OCLS (sym->etype);
+
+ /* if already has one */
+ if (sym->aop)
+ return sym->aop;
+
+ /* assign depending on the storage class */
+ /* if it is on the stack */
+ if (sym->onStack) {
+ sym->aop = aop = newAsmop (0);
+ aop->size = getSize (sym->type);
+
+ /* we can use std / ldd instruction */
+ if (sym->stack > 0
+ && (sym->stack + getSize (sym->type) - 1) <= 63) {
+ aop->type = AOP_STK_D;
+ aop->aopu.aop_stk = sym->stack;
+ return aop;
+ }
- /* offset is greater than
- size then zero */
- if (offset > (aop->size - 1) &&
- aop->type != AOP_LIT)
- return zero;
+ /* otherwise get a free pointer register X/Z */
+ aop->aopu.aop_ptr = getFreePtr (ic, &aop, result, FALSE);
+
+ /* now assign the address of the variable to
+ the pointer register */
+ if (aop->type != AOP_STK) {
+ emitcode ("movw", "%s,r28", aop->aopu.aop_ptr->name);
+ if (sym->stack < 0) {
+ if ((sym->stack - _G.nRegsSaved) > -63) {
+ emitcode ("sbiw", "%s,0x%02x",
+ aop->aopu.aop_ptr->name,
+ (sym->stack -
+ _G.nRegsSaved));
+ }
+ else {
+ emitcode ("subi", "%s,<(%d)",
+ aop->aopu.aop_ptr->name,
+ sym->stack - _G.nRegsSaved);
+ emitcode ("sbci", "%s,>(%d)",
+ aop->aop_ptr2->name,
+ sym->stack - _G.nRegsSaved);
+ }
+ }
+ else {
+ if (sym->stack <= 63) {
+ emitcode ("adiw", "%s,0x%02x",
+ aop->aopu.aop_ptr->name,
+ sym->stack);
+ }
+ else {
+ emitcode ("subi", "%s,<(-%d)",
+ aop->aopu.aop_ptr->name,
+ sym->stack);
+ emitcode ("sbci", "%s,>(-%d)",
+ aop->aop_ptr2->name,
+ sym->stack);
+ }
+ }
+ }
+ return aop;
+ }
- /* depending on type */
- switch (aop->type) {
-
- case AOP_X:
- if (offset > aop->coff) {
- emitcode ("adiw","%s,%d",aop->aopu.aop_ptr->name,offset - aop->coff);
+ /* 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 (offset < aop->coff) {
- emitcode("sbiw","%s,%d",aop->aopu.aop_ptr->name,aop->coff - offset);
+ /* 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;
}
-
- aop->coff = offset ;
- emitcode("ld","%s,x",
- (rs = ((offset & 1) ? "r25" : "r24")));
- return rs;
-
- case AOP_Z:
- if (aop->code) {
- if (offset > aop->coff) {
- emitcode("adiw","r30,%d",offset - aop->coff);
- } else {
- emitcode("sbiw","r30,%d",aop->coff - offset);
- }
- emitcode("lpm","%s,z",(rs = ((offset & 1) ? "r25" : "r24")));
- } else {
- /* we can use lds */
- if (offset > aop->coff) {
- emitcode ("ldd","%s,z+%d",(rs = ((offset & 1) ? "r25" : "r24")),
- offset - aop->coff);
- } else {
- emitcode("sbiw","%s,%d",aop->aopu.aop_ptr->name,aop->coff - offset);
- aop->coff = offset;
- emitcode ("ld","%s,z",(rs = ((offset & 1) ? "r25" : "r24")));
- }
+
+ /* special case for a function */
+ if (IS_FUNC (sym->type)) {
+ sym->aop = aop = newAsmop (AOP_IMMD);
+ aop->aopu.aop_immd = Safe_calloc (1, strlen (sym->rname) + 1);
+ strcpy (aop->aopu.aop_immd, sym->rname);
+ aop->size = FPTRSIZE;
+ return aop;
}
- return rs;
- case AOP_IMMD:
-
- emitcode ("lds","%s,(%s)+%d",
- (rs = ((offset & 1) ? "r25" : "r24")),
- aop->aopu.aop_immd, offset);
- return rs;
-
- case AOP_DIR:
- emitcode ("lds","%s,(%s)+%d",
- (rs = ((offset & 1) ? "r25" : "r24")),
- aop->aopu.aop_dir, offset);
- return rs;
-
- case AOP_REG:
- return aop->aopu.aop_reg[offset]->name;
-
- case AOP_CRY:
- assert("cannot be in bit space AOP_CRY\n");
- break;
-
- case AOP_LIT:
- s = aopLiteral(aop->aopu.aop_lit,offset);
- emitcode("ldi","%s,lo8(%s)",(rs = ((offset & 1)?"r24" : "r25")),s);
- return rs;
-
- case AOP_STR:
- aop->coff = offset ;
- return aop->aopu.aop_str[offset];
-
- case AOP_STK_D:
- emitcode ("ldd","%s,Y+%d",
- (rs = ((offset & 1) ? "r25" : "r24")),
- aop->aopu.aop_stk+offset);
- return rs;
- }
-
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopget got unsupported aop->type");
- exit(0);
+ /* only remaining is code / eeprom which will need pointer reg */
+ /* if it is in code space */
+
+ sym->aop = aop = newAsmop (0);
+
+ if (IN_CODESPACE (space))
+ aop->code = 1;
+
+ aop->aopu.aop_ptr = getFreePtr (ic, &aop, result, aop->code);
+ aop->size = getSize (sym->type);
+ emitcode ("ldi", "%s,<(%s)", aop->aopu.aop_ptr->name, sym->rname);
+ emitcode ("ldi", "%s,>(%s)", aop->aop_ptr2);
+
+ return aop;
}
+
/*-----------------------------------------------------------------*/
-/* aopPut - puts a string for a aop */
+/* aopForRemat - rematerialzes an object */
/*-----------------------------------------------------------------*/
-static void aopPut (asmop *aop, char *s, int offset)
+static asmop *
+aopForRemat (symbol * sym)
{
- char *d = buffer ;
- symbol *lbl ;
-
- if (aop->size && offset > ( aop->size - 1)) {
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopPut got offset > aop->size");
- exit(0);
- }
-
- /* 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);
- }
-
- emitcode("sts","%s,%s",d,s);
- break;
-
- case AOP_REG:
- if (toupper(*s) != 'R') {
- if (s == zero) {
- emitcode("clr","%s",aop->aopu.aop_reg[offset]->name);
- } else {
- emitcode("ldi","r25,%s",s);
- emitcode("mov","%s,r35",aop->aopu.aop_reg[offset]->name);
- }
- } else {
- if (strcmp( aop->aopu.aop_reg[offset]->name,s)) {
- emitcode("mov","%s,%s", aop->aopu.aop_reg[offset]->name,s);
- }
- }
- break;
-
- case AOP_X:
- if (offset > aop->coff) {
- emitcode ("adiw","%s,%d",aop->aopu.aop_ptr->name,offset - aop->coff);
- }
-
- if (offset < aop->coff) {
- emitcode("sbiw","%s,%d",aop->aopu.aop_ptr->name,aop->coff - offset);
- }
-
- aop->coff = offset ;
- emitcode("st","x,%s", s);
- break;
-
- case AOP_Z:
- if (aop->code) {
- if (offset > aop->coff) {
- emitcode("adiw","r30,%d",offset - aop->coff);
- } else {
- emitcode("sbiw","r30,%d",aop->coff - offset);
- }
- emitcode("lpm","%s,z",s);
- } else {
- /* we can use lds */
- if (offset > aop->coff) {
- emitcode ("sdd","z+%d,%s",offset - aop->coff,s);
- } else {
- emitcode("sbiw","%s,%d",aop->aopu.aop_ptr->name,aop->coff - offset);
- aop->coff = offset;
- emitcode ("ld","%s,z",s);
- }
+ iCode *ic = sym->rematiCode;
+ asmop *aop = newAsmop (AOP_IMMD);
+ int val = 0;
+
+ for (;;) {
+ if (ic->op == '+')
+ val += (int) operandLitValue (IC_RIGHT (ic));
+ else if (ic->op == '-')
+ val -= (int) operandLitValue (IC_RIGHT (ic));
+ else
+ break;
+
+ ic = OP_SYMBOL (IC_LEFT (ic))->rematiCode;
}
- break;
-
- case AOP_STK:
- emitcode("push","%s",s);
- break;
-
- case AOP_CRY:
- /* if bit variable */
- assert("bit variable cannot be AOP_CRY\n");
- 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_STK_D:
- emitcode ("std","y+%d,%s",offset,s);
- break;
-
- default :
- werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
- "aopPut got unsupported aop->type");
- exit(0);
- }
-}
+ 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 = Safe_calloc (1, strlen (buffer) + 1);
+ strcpy (aop->aopu.aop_immd, buffer);
+ return aop;
+}
-#if 0
/*-----------------------------------------------------------------*/
-/* pointToEnd :- points to the last byte of the operand */
+/* regsInCommon - two operands have some registers in common */
/*-----------------------------------------------------------------*/
-static void pointToEnd (asmop *aop)
+static bool
+regsInCommon (operand * op1, operand * op2)
{
- int count ;
- if (!aop)
- return ;
-
- aop->coff = count = (aop->size - 1);
- switch (aop->type) {
- case AOP_X :
- case AOP_Z :
- emitcode("adiw","%s,%d",aop->aopu.aop_ptr->name,count);
- break;
- }
+ symbol *sym1, *sym2;
+ int i;
-}
-#endif
+ /* if they have registers in common */
+ if (!IS_SYMOP (op1) || !IS_SYMOP (op2))
+ return FALSE;
-/*-----------------------------------------------------------------*/
-/* reAdjustPreg - points a register back to where it should */
-/*-----------------------------------------------------------------*/
-static void reAdjustPreg (asmop *aop)
-{
- int size ;
-
- aop->coff = 0;
- if ((size = aop->size) <= 1)
- return ;
- size-- ;
- switch (aop->type) {
- case AOP_X :
- case AOP_Z :
- emitcode("sbiw","%s,%d",aop->aopu.aop_ptr->name,size);
- break;
- }
+ sym1 = OP_SYMBOL (op1);
+ sym2 = OP_SYMBOL (op2);
-}
+ if (sym1->nRegs == 0 || sym2->nRegs == 0)
+ return FALSE;
-#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_X || \
- AOP_TYPE(x) == AOP_Z))
-#define AOP_INPREG(x) (x && (x->type == AOP_REG && \
- (x->aopu.aop_reg[0] == avr_regWithIdx(R26_IDX) || \
- x->aopu.aop_reg[0] == avr_regWithIdx(R30_IDX) )))
+ for (i = 0; i < sym1->nRegs; i++) {
+ int j;
+ if (!sym1->regs[i])
+ continue;
-/*-----------------------------------------------------------------*/
-/* genNotFloat - generates not for float operations */
-/*-----------------------------------------------------------------*/
-static void genNotFloat (operand *op, operand *res)
-{
- int size, offset;
- char *l;
- symbol *tlbl ;
-
- /* we will put 127 in the first byte of
- the result */
- aopPut(AOP(res),"127",0);
- size = AOP_SIZE(op) - 1;
- offset = 1;
-
- l = aopGet(op->aop,offset++);
- MOVR0(l);
-
- while(size--) {
- emitcode("or","R0,%s", aopGet(op->aop, offset++);
- }
- tlbl = newiTempLabel(NULL);
-
- tlbl = newiTempLabel(NULL);
- aopPut(res->aop,zero,1);
- emitcode("cpi","r0,0");
- emitcode("breq","L%05d",tlbl->key);
- aopPut(res->aop,one,1);
- emitcode("","L%05d:",tlbl->key);
-
- size = res->aop->size - 2;
- offset = 2;
- /* put zeros in the rest */
- while (size--)
- aopPut(res->aop,zero,offset++);
-}
+ for (j = 0; j < sym2->nRegs; j++) {
+ if (!sym2->regs[j])
+ continue;
-/*-----------------------------------------------------------------*/
-/* opIsGptr: returns non-zero if the passed operand is */
-/* a generic pointer type. */
-/*-----------------------------------------------------------------*/
-static int opIsGptr(operand *op)
-{
- link *type = operandType(op);
-
- if ((AOP_SIZE(op) == GPTRSIZE) && IS_GENPTR(type))
- {
- return 1;
- }
- return 0;
-}
+ if (sym2->regs[j] == sym1->regs[i])
+ return TRUE;
+ }
+ }
-/*-----------------------------------------------------------------*/
-/* getDataSize - get the operand data size */
-/*-----------------------------------------------------------------*/
-static int getDataSize(operand *op)
-{
- int size;
- size = AOP_SIZE(op);
- if (size == GPTRSIZE)
- {
- link *type = operandType(op);
- if (IS_GENPTR(type))
- {
- /* generic pointer; arithmetic operations
- * should ignore the high byte (pointer type).
- */
- size--;
- }
- }
- return size;
+ return FALSE;
}
/*-----------------------------------------------------------------*/
-/* outAcc - output Acc */
+/* operandsEqu - equivalent */
/*-----------------------------------------------------------------*/
-static void outAcc(operand *result)
+static bool
+operandsEqu (operand * op1, operand * op2)
{
- int size, offset;
- size = getDataSize(result);
- if(size){
- aopPut(AOP(result),"r0",0);
- size--;
- offset = 1;
- /* unsigned or positive */
- while(size--){
- aopPut(AOP(result),zero,offset++);
- }
- }
-}
+ symbol *sym1, *sym2;
-/*-----------------------------------------------------------------*/
-/* outBitC - output a bit C */
-/*-----------------------------------------------------------------*/
-static void outBitC(operand *result)
-{
- emitcode("clr","r0");
- emitcode("rol","r0");
- outAcc(result);
-}
+ /* if they not symbols */
+ if (!IS_SYMOP (op1) || !IS_SYMOP (op2))
+ return FALSE;
-/*-----------------------------------------------------------------*/
-/* toBoolean - emit code for orl a,operator(sizeop) */
-/*-----------------------------------------------------------------*/
-static void toBoolean(operand *oper)
-{
- int size = AOP_SIZE(oper) ;
- int offset = 0;
- emitcode ("clr","r0");
- while (size--)
- emitcode("or","r0,%s",aopGet(AOP(oper),offset++));
-}
+ 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;
-/*-----------------------------------------------------------------*/
-/* genNot - generate code for ! operation */
-/*-----------------------------------------------------------------*/
-static void genNot (iCode *ic)
-{
- symbol *tlbl;
- link *optype = operandType(IC_LEFT(ic));
- int size, offset = 1;
-
- /* assign asmOps to operand & result */
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
-
- /* if type float then do float */
- if (IS_FLOAT(optype)) {
- genNotFloat(IC_LEFT(ic),IC_RESULT(ic));
- goto release;
- }
- emitcode("clr","r24");
- tlbl = newiTempLabel(NULL);
- toBoolean(IC_LEFT(ic));
- emitcode("bne","L%05d",tlbl->key);
- emitcode("ldi","r24,1");
- emitcode("","L%05d:",tlbl->key);
- aopPut(AOP(IC_RESULT(ic)),"r24",0);
- size = AOP_SIZE(IC_RESULT(ic)) -1;
- while (size--) aopPut(AOP(IC_RESULT(ic)),zero,offset++);
-
-
-release:
- /* release the aops */
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? 0 : 1));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
-}
+ /* if they are the same */
+ if (sym1 == sym2)
+ return TRUE;
+ if (strcmp (sym1->rname, sym2->rname) == 0)
+ return TRUE;
-/*-----------------------------------------------------------------*/
-/* genCpl - generate code for complement */
-/*-----------------------------------------------------------------*/
-static void genCpl (iCode *ic)
-{
- int offset = 0;
- int size ;
- int samer;
-
- /* assign asmOps to operand & result */
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
- samer = sameRegs(AOP(IC_LEFT(ic),AOP(IC_RESULT(ic))));
- size = AOP_SIZE(IC_RESULT(ic));
- while (size--) {
- char *l = aopGet(AOP(IC_LEFT(ic)),offset);
- if (samer) {
- emitcode ("com","%s",l);
- } else {
- aopPut(AOP(IC_RESULT(ic)),l,offset);
- emitcode ("com","%s",aopGet(AOP(IC_RESULT(ic)),offset++));
- }
- }
+ /* if left is a tmp & right is not */
+ if (IS_ITEMP (op1) &&
+ !IS_ITEMP (op2) && sym1->isspilt && (sym1->usl.spillLoc == sym2))
+ return TRUE;
-release:
- /* release the aops */
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? 0 : 1));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
-}
+ if (IS_ITEMP (op2) &&
+ !IS_ITEMP (op1) &&
+ sym2->isspilt && sym1->level > 0 && (sym2->usl.spillLoc == sym1))
+ return TRUE;
-/*-----------------------------------------------------------------*/
-/* genUminusFloat - unary minus for floating points */
-/*-----------------------------------------------------------------*/
-static void genUminusFloat(operand *op,operand *result)
-{
- 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);
-
- emitcode("ldi","r24,0x80");
- if (sameRegs(AOP(op),AOP(result))) {
- emitcode("eor","%s,r24",l);
- } else {
- aopPut(AOP(result),l,3);
- emitcode("eor","%s,r24",aopGet(AOP(result),3));
- }
- while(size--) {
- aopPut(AOP(result), aopGet(AOP(op),offset), offset);
- offset++;
- }
+ return FALSE;
}
/*-----------------------------------------------------------------*/
-/* genUminus - unary minus code generation */
+/* sameRegs - two asmops have the same registers */
/*-----------------------------------------------------------------*/
-static void genUminus (iCode *ic)
+static bool
+sameRegs (asmop * aop1, asmop * aop2)
{
- int offset ,size ;
- link *optype, *rtype;
- int samer ;
-
- /* assign asmops */
- aopOp(IC_LEFT(ic),ic,FALSE);
- aopOp(IC_RESULT(ic),ic,TRUE);
-
- 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 ;
- samer = sameRegs(AOP(IC_LEFT(ic)),AOP(IC_RESULT(ic)));
- CLRC;
- while(size--) {
- char *l = aopGet(AOP(IC_LEFT(ic)),offset);
- if (samer) {
- emitcode("clr","r0");
- emitcode("sbc","r0,%s",l);
- aopPut(AOP(IC_RESULT(ic)),"r0",offset++);
- } else {
- char *s;
- emitcode("clr","%s",s=aopGet(IC_RESULT(ic),offset++));
- emitcode("sbc","%s,%s",s,l);
- }
- }
-
- /* 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))))) {
- symbol *tlbl = newiTempLabel(NULL);
- emitcode("clr","r0");
- emitcode("brcc","L%05d",tlbl->key);
- emitcode("com","r0");
- emitcode("","L%05d:",tlbl->key);
- while (size--)
- aopPut(AOP(IC_RESULT(ic)),"r0",offset++);
- }
-
-release:
- /* release the aops */
- freeAsmop(IC_LEFT(ic),NULL,ic,(RESULTONSTACK(ic) ? 0 : 1));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
-}
+ int i;
-/*-----------------------------------------------------------------*/
-/* assignResultValue - */
-/*-----------------------------------------------------------------*/
-static void assignResultValue(operand * oper)
-{
- int offset = 0;
- int size = AOP_SIZE(oper);
- while (size--) {
- aopPut(AOP(oper),fReturn[offset],offset);
- offset++;
- }
-}
+ if (aop1 == aop2)
+ return TRUE;
-/*-----------------------------------------------------------------*/
-/* saveZreg - if indirect call then save z-pointer register */
-/*-----------------------------------------------------------------*/
-static void saveZreg (iCode *ic)
-{
- /* only if live accross this call */
- if (ic->regSaved == 0 &&
- (bitVectBitValue(ic->rMask,R30_IDX) ||
- bitVectBitValue(ic->rMask,R31_IDX))) {
- ic->regsSaved = 1;
- emitcode("push","r30");
- emitcode("push","r31");
- }
+ if (aop1->type != AOP_REG || aop2->type != AOP_REG)
+ 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;
+
+ return TRUE;
}
/*-----------------------------------------------------------------*/
-/* popZreg - restore values of zreg */
+/* isRegPair - for size 2 if this operand has a register pair */
/*-----------------------------------------------------------------*/
-static void popZreg (iCode *ic)
+static int
+isRegPair (asmop * aop)
{
- if (ic->regsSaved) {
- emitcode ("pop","r31");
- emitcode ("pop","r30");
- }
+ if (!aop || aop->size < 2)
+ return 0;
+ if (aop->type == AOP_X || aop->type == AOP_Z)
+ return 1;
+ if (aop->type != AOP_REG)
+ return 0;
+ if ( ((aop->aopu.aop_reg[1]->rIdx - aop->aopu.aop_reg[0]->rIdx) == 1) &&
+ (aop->aopu.aop_reg[0]->rIdx & 1) == 0)
+
+ return 1;
+ return 0;
}
/*-----------------------------------------------------------------*/
-/* genIpush - genrate code for pushing this gets a little complex */
+/* allHigh - all registers are high registers */
/*-----------------------------------------------------------------*/
-static void genIpush (iCode *ic)
+static int allHigh (asmop * aop)
{
- int size, offset = 0 ;
- char *l;
-
-
- if (!ic->parmPush) {
- /* and the item is spilt then do nothing */
- if (OP_SYMBOL(IC_LEFT(ic))->isspilt)
- return ;
- } else {
- iCode *lic ;
- for (lic = ic->next ; lic ; lic = lic->next)
- if (lic->op == PCALL) break;
- if (lic) saveZreg(lic);
- }
-
- /* this is a paramter push */
- aopOp(IC_LEFT(ic),ic,FALSE);
- size = AOP_SIZE(IC_LEFT(ic));
- while (size--) {
- l = aopGet(AOP(IC_LEFT(ic)),offset++);
- emitcode("push","%s",l);
- }
-
- freeAsmop(IC_LEFT(ic),NULL,ic,TRUE);
+ int i;
+
+ if (aop->type == AOP_X || aop->type == AOP_Z)
+ return 1;
+ if (aop->type != AOP_REG)
+ return 0;
+ for (i=0; i < aop->size ; i++ )
+ if (aop->aopu.aop_reg[i]->rIdx < R16_IDX) return 0;
+ return 1;
}
/*-----------------------------------------------------------------*/
-/* genIpop - recover the registers: can happen only for spilling */
+/* aopOp - allocates an asmop for an operand : */
/*-----------------------------------------------------------------*/
-static void genIpop (iCode *ic)
+static void
+aopOp (operand * op, iCode * ic, bool result)
{
- int size,offset ;
+ asmop *aop;
+ symbol *sym;
+ int i;
+
+ 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 already has a asmop then continue */
+ if (op->aop)
+ return;
- /* if the temp was not pushed then */
- if (OP_SYMBOL(IC_LEFT(ic))->isspilt)
- return ;
+ /* if the underlying symbol has a aop */
+ if (IS_SYMOP (op) && OP_SYMBOL (op)->aop) {
+ op->aop = OP_SYMBOL (op)->aop;
+ 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--));
+ /* if this is a true symbol */
+ if (IS_TRUE_SYMOP (op)) {
+ op->aop = aopForSym (ic, OP_SYMBOL (op), result);
+ return;
+ }
- freeAsmop(IC_LEFT(ic),NULL,ic,TRUE);
-}
+ /* this is a temporary : this has
+ only four choices :
+ a) register
+ b) spillocation
+ c) rematerialize
+ d) conditional
+ e) can be a return use only */
-/*-----------------------------------------------------------------*/
-/* genCall - generates a call statement */
-/*-----------------------------------------------------------------*/
-static void genCall (iCode *ic)
-{
- link *detype;
-
- /* 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);
- if (strcmp(l,fReturn[offset]))
- emitcode("mov","%s,%s",
- fReturn[offset],
- l);
- offset++;
- }
- freeAsmop (IC_LEFT(sic),NULL,sic,TRUE);
- }
- _G.sendSet = NULL;
- }
- /* make the call */
- emitcode("call","%s",(OP_SYMBOL(IC_LEFT(ic))->rname[0] ?
- OP_SYMBOL(IC_LEFT(ic))->rname :
- OP_SYMBOL(IC_LEFT(ic))->name));
-
- /* 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)) ) {
-
- aopOp(IC_RESULT(ic),ic,FALSE);
- assignResultValue(IC_RESULT(ic));
- freeAsmop(IC_RESULT(ic),NULL, ic,TRUE);
- }
-
- /* adjust the stack for parameters if required */
- if (IC_LEFT(ic)->parmBytes) {
- if (IC_LEFT(ic)->parmBytes > 63) {
- emitcode("sbiw","r28,%d",IC_LEFT(ic)->parmBytes);
- } else {
- emitcode("subi","r28,lo8(%d)",IC_LEFT(ic)->parmBytes);
- emitcode("sbci","r29,hi8(%d)",IC_LEFT(ic)->parmBytes);
- }
- }
+ sym = OP_SYMBOL (op);
-}
-/*-----------------------------------------------------------------*/
-/* genPcall - generates a call by pointer statement */
-/*-----------------------------------------------------------------*/
-static void genPcall (iCode *ic)
-{
- link *detype;
-
- if (!ic->regsSaved) saveZreg(ic);
-
- aopOp(IC_LEFT(ic),ic,FALSE);
- emitcode("mov","r30",aopGet(AOP(IC_LEFT(ic)),0));
- emitcode("mov","r31",aopGet(AOP(IC_RIGHT(ic)),0));
- freeAsmop(IC_LEFT(ic),NULL,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);
- if (strcmp(l,fReturn[offset]))
- emitcode("mov","%s,%s",
- fReturn[offset],
- l);
- offset++;
- }
- freeAsmop (IC_LEFT(sic),NULL,sic,TRUE);
- }
- _G.sendSet = NULL;
- }
-
- emitcode("icall","");
-
- /* 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)) ) {
-
- aopOp(IC_RESULT(ic),ic,FALSE);
-
- assignResultValue(IC_RESULT(ic));
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
- }
-
- /* 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);
-
- }
-
- /* adjust the stack for parameters if required */
- if (IC_LEFT(ic)->parmBytes) {
- if (IC_LEFT(ic)->parmBytes > 63) {
- emitcode("sbiw","r28,%d",IC_LEFT(ic)->parmBytes);
- } else {
- emitcode("subi","r28,lo8(%d)",IC_LEFT(ic)->parmBytes);
- emitcode("sbci","r29,hi8(%d)",IC_LEFT(ic)->parmBytes);
+ /* if the type is a conditional */
+ if (sym->regType & REG_CND) {
+ aop = op->aop = sym->aop = newAsmop (AOP_CRY);
+ aop->size = 0;
+ return;
}
- }
- if (ic->regsSaved) popZregs(ic);
-}
-/*-----------------------------------------------------------------*/
-/* resultRemat - result is rematerializable */
-/*-----------------------------------------------------------------*/
-static int resultRemat (iCode *ic)
-{
- if (SKIP_IC(ic) || ic->op == IFX)
- return 0;
+ /* if it is spilt then two situations
+ a) is rematerialize
+ b) has a spill location */
+ if (sym->isspilt || sym->nRegs == 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;
- }
+ asmop *oldAsmOp = NULL;
- return 0;
-}
+ /* rematerialize it NOW */
+ if (sym->remat) {
+ sym->aop = op->aop = aop = aopForRemat (sym);
+ aop->size = getSize (sym->type);
+ return;
+ }
-#ifdef __BORLANDC__
-#define STRCASECMP stricmp
-#else
-#define STRCASECMP strcasecmp
-#endif
+ if (sym->accuse) {
+ assert ("ACC_USE cannot happen in AVR\n");
+ }
-/*-----------------------------------------------------------------*/
-/* inExcludeList - return 1 if the string is in exclude Reg list */
-/*-----------------------------------------------------------------*/
-static bool inExcludeList(char *s)
-{
- int i =0;
-
- if (options.excludeRegs[i] &&
- STRCASECMP(options.excludeRegs[i],"none") == 0)
- return FALSE ;
+ if (sym->ruonly) {
+ int i;
+ aop = op->aop = sym->aop = newAsmop (AOP_STR);
+ aop->size = getSize (sym->type);
+ for (i = 0; i < (int) fAVRReturnSize; i++)
+ aop->aopu.aop_str[i] = fAVRReturn[i];
+ return;
+ }
- for ( i = 0 ; options.excludeRegs[i]; i++) {
- if (options.excludeRegs[i] &&
- STRCASECMP(s,options.excludeRegs[i]) == 0)
- return TRUE;
- }
- return FALSE ;
+ /* else spill location */
+ if (sym->usl.spillLoc && getSize(sym->type) != getSize(sym->usl.spillLoc->type)) {
+ /* force a new aop if sizes differ */
+ oldAsmOp = sym->usl.spillLoc->aop;
+ sym->usl.spillLoc->aop = NULL;
+ }
+ sym->aop = op->aop = aop =
+ aopForSym (ic, sym->usl.spillLoc, result);
+ if (getSize(sym->type) != getSize(sym->usl.spillLoc->type)) {
+ /* Don't reuse the new aop, go with the last one */
+ sym->usl.spillLoc->aop = oldAsmOp;
+ }
+ 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];
}
/*-----------------------------------------------------------------*/
-/* genFunction - generated code for function entry */
-/*-----------------------------------------------------------------*/
-static void genFunction (iCode *ic)
+/* freeAsmop - free up the asmop given to an operand */
+/*----------------------------------------------------------------*/
+static void
+freeAsmop (operand * op, asmop * aaop, iCode * ic, bool pop)
{
- symbol *sym;
- link *fetype;
- int i = 0;
-
- _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("cli");
-
- if (IS_ISR(sym->etype)) {
- }
-
- /* save the preserved registers that are used in this function */
- for (i = R2_IDX ; i <= R15_IDX ; i++ ) {
- if (bitVectBitValue(sym->regsUsed,i)) {
- _G.nRegsSaved++;
- emitcode("push","%s",avr_regWithIdx(i)->name);
- }
- }
- /* now for the pointer registers */
- if (bitVectBitValue(sym->regsUsed,R26_IDX)) {
- _G.nRegsSaved++;
- emitcode("push","r26");
- }
- if (bitVectBitValue(sym->regsUsed,R27_IDX)) {
- _G.nRegsSaved++;
- emitcode("push","r27");
- }
- if (bitVectBitValue(sym->regsUsed,R30_IDX)) {
- _G.nRegsSaved++;
- emitcode("push","r30");
- }
- if (bitVectBitValue(sym->regsUsed,R31_IDX)) {
- _G.nRegsSaved++;
- emitcode("push","r31");
- }
- /* adjust the stack for the function */
- if (sym->stack) {
- emitcode ("push","r28");
- emitcode ("push","r29");
- emitcode ("in","r28,__SP_L__");
- emitcode ("in","r29,__SP_H__");
- if (sym->stack <= 63) {
- emitcode("sbiw","r28,%d",sym->stack);
- } else {
- emitcode ("subi","r28,lo8(%d)",sym->stack);
- emitcode ("sbci","r29,hi8(%d)",sym->stack);
+ 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_X:
+ if (_G.xPushed) {
+ if (pop) {
+ emitcode ("pop", "r26");
+ emitcode ("pop", "r27");
+ _G.xPushed--;
+ }
+ }
+ bitVectUnSetBit (ic->rUsed, X_IDX);
+ break;
+
+ case AOP_Z:
+ if (_G.zPushed) {
+ if (pop) {
+ emitcode ("pop", "r30");
+ emitcode ("pop", "r31");
+ _G.zPushed--;
+ }
+ }
+ bitVectUnSetBit (ic->rUsed, Z_IDX);
+ break;
+
+ case AOP_STK:
+ {
+ int sz = aop->size;
+ int stk = aop->aopu.aop_stk + aop->size;
+ bitVectUnSetBit (ic->rUsed, X_IDX);
+ bitVectUnSetBit (ic->rUsed, Z_IDX);
+
+ getFreePtr (ic, &aop, FALSE, 0);
+
+ emitcode ("movw", "%s,r28");
+ if (stk) {
+ if (stk <= 63 && stk > 0) {
+ emitcode ("adiw", "%s,0x%02x",
+ aop->aopu.aop_ptr->name,
+ stk + 1);
+ }
+ else {
+ emitcode ("subi", "%s,<(%d)",
+ aop->aopu.aop_ptr->name,
+ -(stk + 1));
+ emitcode ("sbci", "%s,>(%d)",
+ aop->aop_ptr2->name,
+ -(stk + 1));
+ }
+ }
+
+ while (sz--) {
+ emitcode ("pop", "r24");
+ emitcode ("st", "-%s,r24",
+ aop->type == AOP_X ? "X" : "Z");
+ if (!sz)
+ break;
+ }
+ op->aop = aop;
+ freeAsmop (op, NULL, ic, TRUE);
+ if (_G.xPushed) {
+ emitcode ("pop", "r26");
+ emitcode ("pop", "r27");
+ _G.xPushed--;
+ }
+
+ if (_G.zPushed) {
+ emitcode ("pop", "r30");
+ emitcode ("pop", "r31");
+ _G.zPushed--;
+ }
+ }
}
- emitcode("out","__SP_L__,r28");
- emitcode("out","__SP_H__,r29");
- }
-}
-/*-----------------------------------------------------------------*/
-/* genEndFunction - generates epilogue for functions */
-/*-----------------------------------------------------------------*/
-static void genEndFunction (iCode *ic)
-{
- symbol *sym = OP_SYMBOL(IC_LEFT(ic));
-
- /* restore stack pointer */
- if (sym->stack <= 63) {
- emitcode("adiw","r28,%d",sym->stack);
- } else {
- emitcode ("subi","r28,lo8(-%d)",sym->stack);
- emitcode ("sbci","r29,hi8(-%d)",sym->stack);
- }
- emitcode("out","__SP_L__,r28");
- emitcode("out","__SP_H__,r29");
-
- /* pop frame pointer */
- emitcode ("pop","r29");
- emitcode ("pop","r28");
-
- /* restore preserved registers */
- if (bitVectBitValue(sym->regsUsed,R31_IDX)) {
- _G.nRegsSaved--;
- emitcode("pop","r31");
- }
- if (bitVectBitValue(sym->regsUsed,R30_IDX)) {
- _G.nRegsSaved--;
- emitcode("pop","r30");
- }
- if (bitVectBitValue(sym->regsUsed,R27_IDX)) {
- _G.nRegsSaved--;
- emitcode("push","r27");
- }
- if (bitVectBitValue(sym->regsUsed,R26_IDX)) {
- _G.nRegsSaved--;
- emitcode("push","r26");
- }
- for (i = R15_IDX ; i >= R2_IDX ; i-- ) {
- if (bitVectBitValue(sym->regsUsed,i)) {
- _G.nRegsSaved--;
- emitcode("pop","%s",avr_regWithIdx(i)->name);
- }
- }
-
- if (IS_ISR(sym->etype)) {
- }
-
- if (SPEC_CRTCL(fetype))
- emitcode("sti");
+ 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;
+ }
+ }
}
/*-----------------------------------------------------------------*/
-/* genRet - generate code for return statement */
+/* aopGet - for fetching value of the aop */
/*-----------------------------------------------------------------*/
-static void genRet (iCode *ic)
+static char *
+aopGet (asmop * aop, int offset)
{
- 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 ;
- l = aopGet(AOP(IC_LEFT(ic)),offset);
- if (strcmp(fReturn[offset],l))
- emitcode("mov","%s,%s",fReturn[offset++],l);
- }
-
- 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("rjmp","L%05d",returnLabel->key);
-
-}
+ char *s = buffer;
+ char *rs;
-/*-----------------------------------------------------------------*/
-/* genLabel - generates a label */
-/*-----------------------------------------------------------------*/
-static void genLabel (iCode *ic)
-{
- /* special case never generate */
- if (IC_LABEL(ic) == entryLabel)
- return ;
+ /* offset is greater than
+ size then zero */
+ if (offset > (aop->size - 1) && aop->type != AOP_LIT)
+ return zero;
- emitcode("","L%05d:",IC_LABEL(ic)->key);
-}
+ /* depending on type */
+ switch (aop->type) {
-/*-----------------------------------------------------------------*/
-/* genGoto - generates a ljmp */
-/*-----------------------------------------------------------------*/
-static void genGoto (iCode *ic)
-{
- emitcode ("rjmp","L%05d:",(IC_LABEL(ic)->key+100));
-}
+ case AOP_X:
+ if (offset > aop->coff) {
+ emitcode ("adiw", "%s,%d", aop->aopu.aop_ptr->name,
+ offset - aop->coff);
+ }
-/*-----------------------------------------------------------------*/
-/* 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 int findLabelBackwards(iCode *ic, int key)
-{
- int count = 0;
-
- while (ic->prev)
- {
- ic = ic->prev;
- count++;
-
- if (ic->op == LABEL && IC_LABEL(ic)->key == key)
- {
- /* printf("findLabelBackwards = %d\n", count); */
- return count;
- }
- }
-
- return 0;
-}
+ if (offset < aop->coff) {
+ emitcode ("sbiw", "%s,%d", aop->aopu.aop_ptr->name,
+ aop->coff - offset);
+ }
-/*-----------------------------------------------------------------*/
-/* genPlusIncr :- does addition with increment if possible */
-/*-----------------------------------------------------------------*/
-static bool genPlusIncr (iCode *ic)
-{
- unsigned int icount ;
-
- /* 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 ;
-
- icount = floatFromVal (AOP(IC_RIGHT(ic))->aopu.aop_lit);
-
- /* if the sizes are greater than 2 or they are not the same regs
- then we cannot */
- if (AOP_SIZE(IC_RESULT(ic)) > 2 ||
- AOP_SIZE(IC_LEFT(ic)) > 2 ||
- !sameRegs(AOP(IC_LEFT(ic)),AOP(IC_RIGHT(ic))))
- return FALSE ;
-
- /* so we know LEFT & RESULT in the same registers and add
- amount <= 63 */
- /* for short & char types */
- if (AOP_SIZE(IC_RESULT(ic)) < 2) {
- if (icount == 1) {
- emitcode("inc","%s",aopGet(AOP(IC_LEFT(ic)),0));
- return TRUE;
- }
- emicode("subi","%s,lo8(%d)",aopGet(AOP(IC_LEFT(ic)),0),-icount);
- return TRUE;
- }
+ aop->coff = offset;
+ emitcode ("ld", "%s,x",
+ (rs = ((offset & 1) ? "r25" : "r24")));
+ return rs;
+
+ case AOP_Z:
+ if (aop->code) {
+ if (offset > aop->coff) {
+ emitcode ("adiw", "r30,%d",
+ offset - aop->coff);
+ }
+ else {
+ emitcode ("sbiw", "r30,%d",
+ aop->coff - offset);
+ }
+ emitcode ("lpm", "%s,z",
+ (rs = ((offset & 1) ? "r25" : "r24")));
+ }
+ else {
+ /* we can use lds */
+ if (offset > aop->coff) {
+ emitcode ("ldd", "%s,z+%d",
+ (rs =
+ ((offset & 1) ? "r25" : "r24")),
+ offset - aop->coff);
+ }
+ else {
+ emitcode ("sbiw", "%s,%d",
+ aop->aopu.aop_ptr->name,
+ aop->coff - offset);
+ aop->coff = offset;
+ emitcode ("ld", "%s,z",
+ (rs =
+ ((offset & 1) ? "r25" : "r24")));
+ }
+ }
+ return rs;
- /* if register pair and starts with 26/30 then adiw */
- if (isRegPair(AOP(IC_RESULT(ic))) && icount > 0 && icount < 64 &&
- ( IS_REGIDX(AOP(IC_RESULT(ic)),R26_IDX) ||
- IS_REGIDX(AOP(IC_RESULT(ic)),R30_IDX) )) {
- emitcode("adiw","%s,%d",aopGet(AOP(IC_RESULT(ic)),0),icount);
- return TRUE;
- }
-
- /* use subi */
- emitcode("subi","%s,lo8(%d)",aopGet(AOP(IC_RESULT(ic)),0),-icount);
- emitcode("sbci","%s,hi8(%d)",aopGet(AOP(IC_RESULT(ic)),1),-icount);
- return TRUE;
-}
+ case AOP_IMMD:
-/* 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)
-{
- 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),
- GPTRSIZE - 1);
- }
-
- 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),
- 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);
- }
+ emitcode ("lds", "%s,(%s)+%d",
+ (rs = ((offset & 1) ? "r25" : "r24")),
+ aop->aopu.aop_immd, offset);
+ return rs;
+
+ case AOP_DIR:
+ emitcode ("lds", "%s,(%s)+%d",
+ (rs = ((offset & 1) ? "r25" : "r24")),
+ aop->aopu.aop_dir, offset);
+ return rs;
+
+ case AOP_REG:
+ return aop->aopu.aop_reg[offset]->name;
+
+ case AOP_CRY:
+ assert ("cannot be in bit space AOP_CRY\n");
+ break;
+
+ case AOP_LIT:
+ s = aopLiteral (aop->aopu.aop_lit, offset);
+ emitcode ("ldi", "%s,<(%s)",
+ (rs = ((offset & 1) ? "r24" : "r25")), s);
+ return rs;
+
+ case AOP_STR:
+ aop->coff = offset;
+ return aop->aopu.aop_str[offset];
+
+ case AOP_STK_D:
+ emitcode ("ldd", "%s,Y+%d",
+ (rs = ((offset & 1) ? "r25" : "r24")),
+ aop->aopu.aop_stk + offset);
+ return rs;
+ }
+
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopget got unsupported aop->type");
+ exit (0);
}
/*-----------------------------------------------------------------*/
-/* genPlus - generates code for addition */
+/* aopPut - puts a string for a aop */
/*-----------------------------------------------------------------*/
-static void genPlus (iCode *ic)
+static void
+aopPut (asmop * aop, char *s, int offset)
{
- int size, offset = 0;
+ char *d = buffer;
+
+ if (aop->size && offset > (aop->size - 1)) {
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopPut got offset > aop->size");
+ exit (0);
+ }
+
+ /* 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);
+ }
+
+ emitcode ("sts", "%s,%s", d, s);
+ break;
+
+ case AOP_REG:
+ if (toupper ((unsigned char)*s) != 'R') {
+ if (s == zero) {
+ emitcode ("clr", "%s",
+ aop->aopu.aop_reg[offset]->name);
+ }
+ else {
+ emitcode ("ldi", "r25,%s", s);
+ emitcode ("mov", "%s,r35",
+ aop->aopu.aop_reg[offset]->name);
+ }
+ }
+ else {
+ if (strcmp (aop->aopu.aop_reg[offset]->name, s)) {
+ emitcode ("mov", "%s,%s",
+ aop->aopu.aop_reg[offset]->name, s);
+ }
+ }
+ break;
- /* special cases :- */
+ case AOP_X:
+ if (offset > aop->coff) {
+ emitcode ("adiw", "%s,%d", aop->aopu.aop_ptr->name,
+ offset - aop->coff);
+ }
- aopOp (IC_LEFT(ic),ic,FALSE);
- aopOp (IC_RIGHT(ic),ic,FALSE);
- aopOp (IC_RESULT(ic),ic,TRUE);
+ if (offset < aop->coff) {
+ emitcode ("sbiw", "%s,%d", aop->aopu.aop_ptr->name,
+ aop->coff - offset);
+ }
- /* if I can do an increment instead
- of add then GOOD for ME */
- if (genPlusIncr (ic) == TRUE)
- goto release;
+ aop->coff = offset;
+ emitcode ("st", "x,%s", s);
+ break;
- size = getDataSize(IC_RESULT(ic));
+ case AOP_Z:
+ if (aop->code) {
+ if (offset > aop->coff) {
+ emitcode ("adiw", "r30,%d",
+ offset - aop->coff);
+ }
+ else {
+ emitcode ("sbiw", "r30,%d",
+ aop->coff - offset);
+ }
+ emitcode ("lpm", "%s,z", s);
+ }
+ else {
+ /* we can use lds */
+ if (offset > aop->coff) {
+ emitcode ("sdd", "z+%d,%s",
+ offset - aop->coff, s);
+ }
+ else {
+ emitcode ("sbiw", "%s,%d",
+ aop->aopu.aop_ptr->name,
+ aop->coff - offset);
+ aop->coff = offset;
+ emitcode ("ld", "%s,z", s);
+ }
+ }
+ break;
- while(size--){
- aopPut(AOP(IC_RESULT(ic)),aopGet(AOP(IC_RIGHT(ic)),offset),offset);
- if(offset == 0)
- emitcode("add","%s,%s",aopGet(AOP(IC_RESULT(ic)),offset),
- aopGet(AOP(IC_LEFT(ic)),offset));
- else
- emitcode("adc","%s,%s",aopGet(AOP(IC_RESULT(ic)),offset),
- aopGet(AOP(IC_LEFT(ic)),offset));
- }
- }
+ case AOP_STK:
+ emitcode ("push", "%s", s);
+ break;
+
+ case AOP_CRY:
+ /* if used only for a condition code check */
+ assert (toupper ((unsigned char)*s) == 'R');
+ if (offset == 0) {
+ emitcode ("xrl", "r0,r0");
+ emitcode ("cpi", "%s,0", s);
+ }
+ else {
+ emitcode ("cpc", "r0,%s", s);
+ }
+ 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_STK_D:
+ emitcode ("std", "y+%d,%s", offset, s);
+ break;
- adjustArithmeticResult(ic);
+ default:
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "aopPut got unsupported aop->type");
+ exit (0);
+ }
-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);
}
+#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_X || \
+ AOP_TYPE(x) == AOP_Z))
+#define AOP_INPREG(x) (x && (x->type == AOP_REG && \
+ ((x->aopu.aop_reg[0] == avr_regWithIdx(R26_IDX) && x->aopu.aop_reg[1] == avr_regWithIdx(R27_IDX)) || \
+ (x->aopu.aop_reg[0] == avr_regWithIdx(R30_IDX) && x->aopu.aop_reg[1] == avr_regWithIdx(R31_IDX)) )))
+#define AOP_ISX(x) (x && (x->type == AOP_REG && \
+ ((x->aopu.aop_reg[0] == avr_regWithIdx(R26_IDX) && x->aopu.aop_reg[1] == avr_regWithIdx(R27_IDX)))))
+#define AOP_ISZ(x) (x && (x->type == AOP_REG && \
+ ((x->aopu.aop_reg[0] == avr_regWithIdx(R30_IDX) && x->aopu.aop_reg[1] == avr_regWithIdx(R31_IDX)))))
+
/*-----------------------------------------------------------------*/
-/* genMinusDec :- does subtraction with deccrement if possible */
+/* genNotFloat - generates not for float operations */
/*-----------------------------------------------------------------*/
-static bool genMinusDec (iCode *ic)
+static void
+genNotFloat (operand * op, operand * res)
{
- unsigned int icount ;
-
- /* 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 ;
-
- icount = floatFromVal (AOP(IC_RIGHT(ic))->aopu.aop_lit);
-
- /* if the sizes are greater than 2 or they are not the same regs
- then we cannot */
- if (AOP_SIZE(IC_RESULT(ic)) > 2 ||
- AOP_SIZE(IC_LEFT(ic)) > 2 ||
- !sameRegs(AOP(IC_LEFT(ic)),AOP(IC_RIGHT(ic))))
- return FALSE ;
-
- /* so we know LEFT & RESULT in the same registers and add
- amount <= 63 */
- /* for short & char types */
- if (AOP_SIZE(IC_RESULT(ic)) < 2) {
- if (icount == 1) {
- emitcode("dec","%s",aopGet(AOP(IC_LEFT(ic)),0));
- return TRUE;
- }
- emicode("subi","%s,lo8(%d)",aopGet(AOP(IC_LEFT(ic)),0),icount);
- return TRUE;
- }
+ int size, offset;
+ char *l;
+ symbol *tlbl;
+
+ /* we will put 127 in the first byte of
+ the result */
+ aopPut (AOP (res), "127", 0);
+ size = AOP_SIZE (op) - 1;
+ offset = 1;
- /* if register pair and starts with 26/30 then adiw */
- if (isRegPair(AOP(IC_RESULT(ic))) && icount > 0 && icount < 64 &&
- ( IS_REGIDX(AOP(IC_RESULT(ic)),R26_IDX) ||
- IS_REGIDX(AOP(IC_RESULT(ic)),R30_IDX) )) {
- emitcode("sbiw","%s,%d",aopGet(AOP(IC_RESULT(ic)),0),icount);
- return TRUE;
- }
-
- /* use subi */
- emitcode("subi","%s,lo8(%d)",aopGet(AOP(IC_RESULT(ic)),0),icount);
- emitcode("sbci","%s,hi8(%d)",aopGet(AOP(IC_RESULT(ic)),1),icount);
- return TRUE;
+ l = aopGet (op->aop, offset++);
+ MOVR0 (l);
+
+ while (size--) {
+ emitcode ("or", "R0,%s", aopGet (op->aop, offset++));
+ }
+ tlbl = newiTempLabel (NULL);
+
+ tlbl = newiTempLabel (NULL);
+ aopPut (res->aop, zero, 1);
+ emitcode ("cpi", "r0,0");
+ emitcode ("breq", "L%05d", tlbl->key);
+ aopPut (res->aop, one, 1);
+ emitcode ("", "L%05d:", tlbl->key);
+
+ size = res->aop->size - 2;
+ offset = 2;
+ /* put zeros in the rest */
+ while (size--)
+ aopPut (res->aop, zero, offset++);
}
/*-----------------------------------------------------------------*/
-/* addSign - complete with sign */
+/* opIsGptr: returns non-zero if the passed operand is */
+/* a generic pointer type. */
/*-----------------------------------------------------------------*/
-static void addSign(operand *result, int offset, int sign)
+static int
+opIsGptr (operand * op)
{
- 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++);
- }
+ sym_link *type = operandType (op);
+
+ if ((AOP_SIZE (op) == GPTRSIZE) && IS_GENPTR (type)) {
+ return 1;
+ }
+ return 0;
}
/*-----------------------------------------------------------------*/
-/* genMinus - generates code for subtraction */
+/* getDataSize - get the operand data size */
/*-----------------------------------------------------------------*/
-static void genMinus (iCode *ic)
+static int
+getDataSize (operand * op)
{
- 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);
-
- /* if I can do an decrement instead
- of subtract then GOOD for ME */
- if (genMinusDec (ic) == TRUE)
- goto release;
-
- size = getDataSize(IC_RESULT(ic));
-
- while (size--) {
- aopPut(AOP(IC_RESULT(ic)),aopGet(AOP(IC_RIGHT(ic)),offset),offset);
- if(offset == 0)
- emitcode("sub","%s,%s",aopGet(AOP(IC_RESULT(ic)),offset),
- aopGet(AOP(IC_LEFT(ic)),offset));
- else
- emitcode("sbc","%s,%s",aopGet(AOP(IC_RESULT(ic)),offset),
- aopGet(AOP(IC_LEFT(ic)),offset));
- }
-
- 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);
+ 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;
}
/*-----------------------------------------------------------------*/
-/* genMultOneByte : 8 bit multiplication & division */
+/* toBoolean - emit code for orl a,operator(sizeop) */
/*-----------------------------------------------------------------*/
-static void genMultOneByte (operand *left,
- operand *right,
- operand *result)
+static void
+toBoolean (operand * oper, char *r, bool clr)
{
- link *opetype = operandType(result);
- char *l ;
- symbol *lbl ;
- int size,offset;
-
- /* (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;
- }
-
- size = AOP_SIZE(result);
-
- if (SPEC_USIGN(opetype)) {
- emitcode("mul","%s,%s",
- aopGet(IC_LEFT(ic),0),
- aopGet(IC_RIGHT(ic),0));
- } else {
- emitcode("muls","%s,%s",
- aopGet(IC_LEFT(ic),0),
- aopGet(IC_RIGHT(ic),0));
- }
- aopPut(AOP(IC_RESULT(ic)),"r0",0);
- if (size > 1){
- aopPut(AOP(IC_RESULT(ic)),"r1",1);
- offset = 2;
- size -= 2;
- if (SPEC_USIGN(opetype)) {
- while(size--) {
- aopPut(AOP(IC_RESULT(ic)),zero,offset++);
- }
+ int size = AOP_SIZE (oper);
+ int offset = 0;
+ if (clr) {
+ emitcode ("clr", "%s", r);
+ while (size--)
+ emitcode ("or", "%s,%s", r, aopGet (AOP (oper), offset++));
} else {
- lbl = newiTempLabel(NULL);
- emitcode("ldi","r24,0");
- emitcode("brcc","L%05d",lbl->key);
- emitcode("ldi","r24,lo8(-1)");
- emitcode("","L%05d:",lbl->key);
- while (size--) aopPut(AOP(IC_RESULT(ic)),"r24",offset++);
- }
- }
- return;
+ size--;
+ emitcode("mov","%s,%s",r,aopGet (AOP (oper), offset++));
+ if (size) while (size--) emitcode ("or", "%s,%s", r, aopGet (AOP (oper), offset++));
+ }
}
-/*-----------------------------------------------------------------*/
-/* genMult - generates code for multiplication */
-/*-----------------------------------------------------------------*/
-static void genMult (iCode *ic)
-{
- 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);
-
- /* if both are of size == 1 */
- if (AOP_SIZE(left) == 1 &&
- AOP_SIZE(right) == 1 ) {
- genMultOneByte(left,right,result);
- goto release ;
- }
-
- /* 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);
-}
/*-----------------------------------------------------------------*/
-/* genDiv - generates code for division */
+/* genNot - generate code for ! operation */
/*-----------------------------------------------------------------*/
-static void genDiv (iCode *ic)
+static void
+genNot (iCode * ic)
{
- /* should have been converted to function call */
- assert(1);
+ symbol *tlbl;
+ sym_link *optype = operandType (IC_LEFT (ic));
+ int size, offset = 1;
+
+ /* assign asmOps to operand & result */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
+
+ /* if type float then do float */
+ if (IS_FLOAT (optype)) {
+ genNotFloat (IC_LEFT (ic), IC_RESULT (ic));
+ goto release;
+ }
+ emitcode ("clr", "r24");
+ tlbl = newiTempLabel (NULL);
+ size = AOP_SIZE (IC_LEFT (ic));
+ offset = 0;
+ if (size == 1) {
+ emitcode ("cpse", "%s,r24", aopGet (AOP (IC_LEFT (ic)), 0));
+ }
+ else {
+ while (size--) {
+ if (offset)
+ emitcode ("cpc", "%s,r24",
+ aopGet (AOP (IC_LEFT (ic)),
+ offset));
+ else
+ emitcode ("cpi", "%s,0",
+ aopGet (AOP (IC_LEFT (ic)),
+ offset));
+ offset++;
+ }
+ emitcode ("bne", "L%05d", tlbl->key);
+ }
+ emitcode ("ldi", "r24,1");
+ emitcode ("", "L%05d:", tlbl->key);
+ aopPut (AOP (IC_RESULT (ic)), "r24", 0);
+ size = AOP_SIZE (IC_RESULT (ic)) - 1;
+ offset = 1;
+ while (size--)
+ aopPut (AOP (IC_RESULT (ic)), zero, offset++);
+
+
+ release:
+ /* release the aops */
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? 0 : 1));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
+
/*-----------------------------------------------------------------*/
-/* genMod - generates code for division */
+/* genCpl - generate code for complement */
/*-----------------------------------------------------------------*/
-static void genMod (iCode *ic)
+static void
+genCpl (iCode * ic)
{
- /* should have been converted to function call */
- assert(1);
+ int offset = 0;
+ int size;
+ int samer;
+
+ /* assign asmOps to operand & result */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
+ samer = sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic)));
+ size = AOP_SIZE (IC_RESULT (ic));
+ while (size--) {
+ char *l = aopGet (AOP (IC_LEFT (ic)), offset);
+ if (samer) {
+ emitcode ("com", "%s", l);
+ }
+ else {
+ aopPut (AOP (IC_RESULT (ic)), l, offset);
+ emitcode ("com", "%s",
+ aopGet (AOP (IC_RESULT (ic)), offset));
+ }
+ offset++;
+ }
+ /* release the aops */
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? 0 : 1));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genCmpGt :- greater than comparison */
+/* genUminusFloat - unary minus for floating points */
/*-----------------------------------------------------------------*/
-static void genCmpGt (iCode *ic, iCode *ifx)
+static void
+genUminusFloat (operand * op, operand * result)
{
- /* should have transformed by the parser */
- assert(1);
+ 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);
+
+ emitcode ("ldi", "r24,0x80");
+ if (sameRegs (AOP (op), AOP (result))) {
+ emitcode ("eor", "%s,r24", l);
+ }
+ else {
+ aopPut (AOP (result), l, 3);
+ emitcode ("eor", "%s,r24", aopGet (AOP (result), 3));
+ }
+ while (size--) {
+ aopPut (AOP (result), aopGet (AOP (op), offset), offset);
+ offset++;
+ }
}
-enum {
- AVR_EQ = 0,
- AVR_NE,
- AVR_LT,
- AVR_GE
-};
-
/*-----------------------------------------------------------------*/
-/* revavrcnd - reverse a conditional for avr */
+/* genUminus - unary minus code generation */
/*-----------------------------------------------------------------*/
-static int revavrcnd(int type)
+static void
+genUminus (iCode * ic)
{
- static struct {
- int type, rtype;
- } rar[] = { { AVR_EQ, AVR_NE}, {AVR_LT, AVR_GE}};
- int i;
-
- for (i = 0 ; i < (sizeof(rar)/sizeof(rar[0]));i++) {
- if (rar[i].type == type) return rar[i].rtype;
- if (rar[i].rtype== type) return rar[i].type;
- }
- assert(1); /* cannot happen */
-}
+ int offset, size;
+ sym_link *optype, *rtype;
+ int samer;
-static char *br_name[4] = {"breq","brne","brlt","brge"};
-static char *br_uname[4]= {"breq","brne","brlo","brcc"};
+ /* assign asmops */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
-/*-----------------------------------------------------------------*/
-/* genBranch - generate the branch instruction */
-/*-----------------------------------------------------------------*/
-static void genBranch (iCode *ifx, int br_type, int sign)
-{
- int tj = (IC_TRUE(ifx) ? 1 : 0) ;
-
- if (tj) { /* if true jump */
- char *nm = (sign ? br_name[br_type] : br_uname[br_type]);
- emitcode(nm,"L%05d",IC_TRUE(ifx)->key);
- } else { /* if false jump */
- int rtype = revavrcnd(br_type);
- char *nm = (sign ? br_name[rtype] : br_uname[rtype]);
- emitcode(nm,"L%05d",IC_FALSE(ifx)->key);
- }
- ifx->generated = 1;
-}
+ optype = operandType (IC_LEFT (ic));
+ rtype = operandType (IC_RESULT (ic));
-/*-----------------------------------------------------------------*/
-/* genCmpLt - less than comparisons */
-/*-----------------------------------------------------------------*/
-static void genCmpLt (iCode *ic, iCode *ifx)
-{
- operand *left, *right, *result;
- link *letype , *retype;
- symbol *lbl;
- int sign, size, offset =0;
-
- 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);
- size = AOP_SIZE(AOP(left));
-
- if (ifx) {
+ /* 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;
+ samer = sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic)));
if (size == 1) {
- if (AOP_TYPE(AOP(right)) == AOP_LIT) {
- emitcode("cpi","%s,lo8(%d)",aopGet(AOP(left),0),
- (int) floatFromVal (AOP(IC_RIGHT(ic))->aopu.aop_lit));
- genBranch(ifx,AVR_LT);
- } else { /* right != literal */
- emitcode("cp","%s,%s",aopGet(AOP(left),0),aopGet(AOP(right),0));
- genBranch(ifx,AVR_LT);
- } else { /* size != 1 */
- while (size--) {
- if (offset = 0)
- emitcode("cp","%s,%s",aopGet(AOP(left),0),aopGet(AOP(right),0));
- else
- emitcode("cpc","%s,%s",aopGet(AOP(left),offset),aopGet(AOP(right),offset));
- offset++;
- }
- genBranch(ifx,AVR_LT);
+ if (samer) {
+ emitcode ("neg", "%s",
+ aopGet (AOP (IC_LEFT (ic)), 0));
+ }
+ else {
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_LEFT (ic)), 0), 0);
+ emitcode ("neg", "%s",
+ aopGet (AOP (IC_RESULT (ic)), 0));
+ }
}
- } else { /* no ifx */
- emitCode("clr","r0");
- while (size--) {
- if (offset = 0)
- emitcode("cp","%s,%s",aopGet(AOP(left),0),aopGet(AOP(right),0));
- else
- emitcode("cpc","%s,%s",aopGet(AOP(left),offset),aopGet(AOP(right),offset));
- offset++;
+ else {
+ offset = size - 1;
+ while (size--) {
+ char *l = aopGet (AOP (IC_LEFT (ic)), offset);
+ if (!samer) {
+ aopPut (AOP (IC_RESULT (ic)), l, offset);
+ l = aopGet (AOP (IC_RESULT (ic)), offset);
+ }
+ if (offset)
+ emitcode ("com", "%s", l);
+ else
+ emitcode ("neg", "%s", l);
+ offset--;
+ }
+ size = AOP_SIZE (IC_LEFT (ic)) - 1;
+ offset = 1;
+ while (size--) {
+ emitcode ("sbci", "%s,0xff",
+ aopGet (AOP (IC_RESULT (ic)), 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))))) {
+ symbol *tlbl = newiTempLabel (NULL);
+ emitcode ("clr", "r0");
+ emitcode ("brcc", "L%05d", tlbl->key);
+ emitcode ("com", "r0");
+ emitcode ("", "L%05d:", tlbl->key);
+ while (size--)
+ aopPut (AOP (IC_RESULT (ic)), "r0", offset++);
}
- lbl = newiTempLabel(NULL);
- if (sign) emitcode(br_uname[AVR_GE],"L%05d",lbl->key);
- else emitcode(br_name[AVR_GE],"L%05d",lbl->key);
- emitcode("inc","r0");
- emitcode("","L%05d:",lbl->key);
- aopPut(AOP(result),"r0",0);
- size = AOP_SIZE(AOP(result)) - 1;
- offset = 1;
- while (size--) aopPut(AOP(result),zero,offset++);
- }
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ release:
+ /* release the aops */
+ freeAsmop (IC_LEFT (ic), NULL, ic, (RESULTONSTACK (ic) ? 0 : 1));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genCmpEq - generates code for equal to */
+/* assignResultValue - */
/*-----------------------------------------------------------------*/
-static void genCmpEq (iCode *ic, iCode *ifx)
+static void
+assignResultValue (operand * oper)
{
- 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;
- }
-
-
-release:
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ int offset = 0;
+ int size = AOP_SIZE (oper);
+ while (size--) {
+ aopPut (AOP (oper), fAVRReturn[offset], offset);
+ offset++;
+ }
}
/*-----------------------------------------------------------------*/
-/* ifxForOp - returns the icode containing the ifx for operand */
+/* saveZreg - if indirect call then save z-pointer register */
/*-----------------------------------------------------------------*/
-static iCode *ifxForOp ( operand *op, iCode *ic )
+static void
+saveZreg (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;
+ /* only if live accross this call */
+ if (ic->regsSaved == 0 &&
+ (bitVectBitValue (ic->rMask, R30_IDX) ||
+ bitVectBitValue (ic->rMask, R31_IDX))) {
+ ic->regsSaved = 1;
+ emitcode ("push", "r30");
+ emitcode ("push", "r31");
+ }
}
+
/*-----------------------------------------------------------------*/
-/* genAndOp - for && operation */
+/* popZreg - restore values of zreg */
/*-----------------------------------------------------------------*/
-static void genAndOp (iCode *ic)
+static void
+popZreg (iCode * ic)
{
- operand *left,*right, *result;
- symbol *tlbl;
-
- /* 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(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ if (ic->regsSaved) {
+ emitcode ("pop", "r31");
+ emitcode ("pop", "r30");
+ }
}
-
/*-----------------------------------------------------------------*/
-/* genOrOp - for || operation */
+/* genIpush - genrate code for pushing this gets a little complex */
/*-----------------------------------------------------------------*/
-static void genOrOp (iCode *ic)
+static void
+genIpush (iCode * ic)
{
- operand *left,*right, *result;
- symbol *tlbl;
-
- /* 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(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ int size, offset = 0;
+ char *l;
+
+
+ if (!ic->parmPush) {
+ /* and the item is spilt then do nothing */
+ if (OP_SYMBOL (IC_LEFT (ic))->isspilt)
+ return;
+ }
+ else {
+ iCode *lic;
+ for (lic = ic->next; lic; lic = lic->next)
+ if (lic->op == PCALL)
+ break;
+ if (lic)
+ saveZreg (lic);
+ }
+
+ /* this is a paramter push */
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ size = AOP_SIZE (IC_LEFT (ic));
+ while (size--) {
+ l = aopGet (AOP (IC_LEFT (ic)), offset++);
+ emitcode ("push", "%s", l);
+ }
+
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* isLiteralBit - test if lit == 2^n */
+/* genIpop - recover the registers: can happen only for spilling */
/*-----------------------------------------------------------------*/
-static int isLiteralBit(unsigned long lit)
+static void
+genIpop (iCode * ic)
{
- 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;
+ int size, offset;
+
+
+ /* 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--));
+
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* continueIfTrue - */
+/* genCall - generates a call statement */
/*-----------------------------------------------------------------*/
-static void continueIfTrue (iCode *ic)
+static void
+genCall (iCode * ic)
{
- if(IC_TRUE(ic))
- emitcode("ljmp","%05d$",IC_TRUE(ic)->key+100);
- ic->generated = 1;
-}
+
+ /* if send set is not empty then assign */
+ if (_G.sendSet) {
+ iCode *sic;
+ int rnum = 16;
+ for (sic = setFirstItem (_G.sendSet); sic;
+ sic = setNextItem (_G.sendSet)) {
+ int size, offset = 0;
+ aopOp (IC_LEFT (sic), sic, FALSE);
+ size = AOP_SIZE (IC_LEFT (sic));
+ while (size--) {
+ char *l =
+ aopGet (AOP (IC_LEFT (sic)), offset);
+ char *b = buffer;
+ sprintf (buffer, "r%d", rnum++);
+ if (strcmp (l, b))
+ emitcode ("mov", "%s,%s", b, l);
+ offset++;
+ }
+ freeAsmop (IC_LEFT (sic), NULL, sic, TRUE);
+ }
+ _G.sendSet = NULL;
+ }
+ /* make the call */
+ emitcode ("call", "%s", (OP_SYMBOL (IC_LEFT (ic))->rname[0] ?
+ OP_SYMBOL (IC_LEFT (ic))->rname :
+ OP_SYMBOL (IC_LEFT (ic))->name));
+
+ /* if we need assign a result value */
+ if ((IS_ITEMP (IC_RESULT (ic)) &&
+ (OP_SYMBOL (IC_RESULT (ic))->nRegs ||
+ OP_SYMBOL (IC_RESULT (ic))->spildir)) ||
+ IS_TRUE_SYMOP (IC_RESULT (ic))) {
+
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ assignResultValue (IC_RESULT (ic));
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+ }
+
+ /* adjust the stack for parameters if required */
+ if (ic->parmBytes) {
+ if (ic->parmBytes > 63) {
+ emitcode ("sbiw", "r28,%d", ic->parmBytes);
+ }
+ else {
+ emitcode ("subi", "r28,<(%d)",
+ ic->parmBytes);
+ emitcode ("sbci", "r29,>(%d)",
+ ic->parmBytes);
+ }
+ }
+
+}
/*-----------------------------------------------------------------*/
-/* jmpIfTrue - */
+/* genPcall - generates a call by pointer statement */
/*-----------------------------------------------------------------*/
-static void jumpIfTrue (iCode *ic)
+static void
+genPcall (iCode * ic)
{
- if(!IC_TRUE(ic))
- emitcode("ljmp","%05d$",IC_FALSE(ic)->key+100);
- ic->generated = 1;
+
+ if (!ic->regsSaved)
+ saveZreg (ic);
+
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ emitcode ("mov", "r30", aopGet (AOP (IC_LEFT (ic)), 0));
+ emitcode ("mov", "r31", aopGet (AOP (IC_RIGHT (ic)), 0));
+ freeAsmop (IC_LEFT (ic), NULL, ic, TRUE);
+
+ /* if send set is not empty the assign */
+ if (_G.sendSet) {
+ iCode *sic;
+ int rnum = 16;
+ 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);
+ char *b = buffer;
+ sprintf (b, "r%d", rnum++);
+ if (strcmp (l, b))
+ emitcode ("mov", "%s,%s", b, l);
+ offset++;
+ }
+ freeAsmop (IC_LEFT (sic), NULL, sic, TRUE);
+ }
+ _G.sendSet = NULL;
+ }
+
+ emitcode ("icall", "");
+
+ /* 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))) {
+
+ aopOp (IC_RESULT (ic), ic, FALSE);
+
+ assignResultValue (IC_RESULT (ic));
+ freeAsmop (IC_RESULT (ic), NULL, ic, 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);
+
+ }
+
+ /* adjust the stack for parameters if required */
+ if (ic->parmBytes) {
+ if (ic->parmBytes > 63) {
+ emitcode ("sbiw", "r28,%d", ic->parmBytes);
+ }
+ else {
+ emitcode ("subi", "r28,<(%d)",
+ ic->parmBytes);
+ emitcode ("sbci", "r29,>(%d)",
+ ic->parmBytes);
+ }
+ }
+ if (ic->regsSaved)
+ popZreg (ic);
}
/*-----------------------------------------------------------------*/
-/* jmpTrueOrFalse - */
+/* resultRemat - result is rematerializable */
/*-----------------------------------------------------------------*/
-static void jmpTrueOrFalse (iCode *ic, symbol *tlbl)
+static int
+resultRemat (iCode * ic)
{
- // 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;
+ 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;
}
/*-----------------------------------------------------------------*/
-/* genAnd - code for and */
+/* genFunction - generated code for function entry */
/*-----------------------------------------------------------------*/
-static void genAnd (iCode *ic, iCode *ifx)
+static void
+genFunction (iCode * ic)
{
- 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);
-
-#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
+ symbol *sym;
+ sym_link *ftype;
+ int i = 0;
- /* 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;
- }
+ _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 critical function then turn interrupts off */
+ if (IFFUNC_ISCRITICAL (ftype))
+ emitcode ("cli", "");
+
+ if (IFFUNC_ISISR (sym->type)) {
+ }
+
+ /* save the preserved registers that are used in this function */
+ for (i = R2_IDX; i <= R15_IDX; i++) {
+ if (bitVectBitValue (sym->regsUsed, i)) {
+ _G.nRegsSaved++;
+ emitcode ("push", "%s", avr_regWithIdx (i)->name);
+ }
+ }
+ /* now for the pointer registers */
+ if (bitVectBitValue (sym->regsUsed, R26_IDX)) {
+ _G.nRegsSaved++;
+ emitcode ("push", "r26");
+ }
+ if (bitVectBitValue (sym->regsUsed, R27_IDX)) {
+ _G.nRegsSaved++;
+ emitcode ("push", "r27");
+ }
+ if (bitVectBitValue (sym->regsUsed, R30_IDX)) {
+ _G.nRegsSaved++;
+ emitcode ("push", "r30");
+ }
+ if (bitVectBitValue (sym->regsUsed, R31_IDX)) {
+ _G.nRegsSaved++;
+ emitcode ("push", "r31");
+ }
+ /* adjust the stack for the function */
+ if (sym->stack) {
+ emitcode ("push", "r28");
+ emitcode ("push", "r29");
+ emitcode ("in", "r28,__SP_L__");
+ emitcode ("in", "r29,__SP_H__");
+ if (sym->stack <= 63) {
+ emitcode ("sbiw", "r28,%d", sym->stack);
}
- // 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));
+ emitcode ("subi", "r28,<(%d)", sym->stack);
+ emitcode ("sbci", "r29,>(%d)", sym->stack);
}
- aopPut(AOP(result),"a",offset);
- }
+ emitcode ("out", "__SP_L__,r28");
+ emitcode ("out", "__SP_H__,r29");
}
- }
-
-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 */
+/* genEndFunction - generates epilogue for functions */
/*-----------------------------------------------------------------*/
-static void genOr (iCode *ic, iCode *ifx)
+static void
+genEndFunction (iCode * ic)
{
- 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);
-
-#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
+ symbol *sym = OP_SYMBOL (IC_LEFT (ic));
+ int i;
+
+ /* restore stack pointer */
+ if (sym->stack) {
+ if (sym->stack <= 63) {
+ emitcode ("adiw", "r28,%d", sym->stack);
+ }
+ else {
+ emitcode ("subi", "r28,<(-%d)", sym->stack);
+ emitcode ("sbci", "r29,>(-%d)", sym->stack);
+ }
+ emitcode ("out", "__SP_L__,r28");
+ emitcode ("out", "__SP_H__,r29");
+
+ /* pop frame pointer */
+ emitcode ("pop", "r29");
+ emitcode ("pop", "r28");
+ }
+ /* restore preserved registers */
+ if (bitVectBitValue (sym->regsUsed, R31_IDX)) {
+ _G.nRegsSaved--;
+ emitcode ("pop", "r31");
+ }
+ if (bitVectBitValue (sym->regsUsed, R30_IDX)) {
+ _G.nRegsSaved--;
+ emitcode ("pop", "r30");
+ }
+ if (bitVectBitValue (sym->regsUsed, R27_IDX)) {
+ _G.nRegsSaved--;
+ emitcode ("pop", "r27");
+ }
+ if (bitVectBitValue (sym->regsUsed, R26_IDX)) {
+ _G.nRegsSaved--;
+ emitcode ("pop", "r26");
+ }
+ for (i = R15_IDX; i >= R2_IDX; i--) {
+ if (bitVectBitValue (sym->regsUsed, i)) {
+ _G.nRegsSaved--;
+ emitcode ("pop", "%s", avr_regWithIdx (i)->name);
+ }
+ }
+
+ if (IFFUNC_ISCRITICAL (sym->type))
+ emitcode ("sti", "");
+
+ if (options.debug && currFunc) {
+ debugFile->writeEndFunction (currFunc, ic, 1);
+ }
+
+ if (IFFUNC_ISISR (sym->type)) {
+ emitcode ("rti", "");
+ }
+ else {
+ emitcode ("ret", "");
+ }
- /* 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);
- }
- }
-
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
}
/*-----------------------------------------------------------------*/
-/* genXor - code for xclusive or */
+/* genRet - generate code for return statement */
/*-----------------------------------------------------------------*/
-static void genXor (iCode *ic, iCode *ifx)
+static void
+genRet (iCode * ic)
{
- 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);
-
-#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
+ int size, offset = 0;
- /* 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);
- } 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));
+ /* 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--) {
+ if (AOP_TYPE (IC_LEFT (ic)) == AOP_LIT) {
+ emitcode ("ldi", "%s,%s(%d)", fAVRReturn[offset],
+ larray[offset],
+ (int) floatFromVal (AOP (IC_LEFT (ic))->
+ aopu.aop_lit), offset);
+ }
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);
- }
- }
-
-release :
- freeAsmop(left,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(right,NULL,ic,(RESULTONSTACK(ic) ? FALSE : TRUE));
- freeAsmop(result,NULL,ic,TRUE);
+ char *l;
+ l = aopGet (AOP (IC_LEFT (ic)), offset);
+ if (strcmp (fAVRReturn[offset], l))
+ emitcode ("mov", "%s,%s", fAVRReturn[offset],
+ l);
+ }
+ offset++;
+ }
+
+ 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 ("rjmp", "L%05d", returnLabel->key);
+
}
/*-----------------------------------------------------------------*/
-/* genInline - write the inline code out */
+/* genLabel - generates a label */
/*-----------------------------------------------------------------*/
-static void genInline (iCode *ic)
+static void
+genLabel (iCode * ic)
{
- 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);
+ /* special case never generate */
+ if (IC_LABEL (ic) == entryLabel)
+ return;
+
+ emitcode ("", "L%05d:", IC_LABEL (ic)->key);
}
/*-----------------------------------------------------------------*/
-/* genRRC - rotate right with carry */
+/* genGoto - generates a ljmp */
/*-----------------------------------------------------------------*/
-static void genRRC (iCode *ic)
+static void
+genGoto (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 = 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--);
- }
- /* 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");
- aopPut(AOP(result),"a",AOP_SIZE(result)-1);
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ emitcode ("rjmp", "L%05d", (IC_LABEL (ic)->key));
}
/*-----------------------------------------------------------------*/
-/* genRLC - generate code for rotate left with carry */
+/* genPlusIncr :- does addition with increment if possible */
/*-----------------------------------------------------------------*/
-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++);
- }
- }
- /* 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");
- aopPut(AOP(result),"a",0);
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+static bool
+genPlusIncr (iCode * ic)
+{
+ unsigned int icount;
+ int offset = 0;
+
+ /* 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;
+
+ icount = (unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.
+ aop_lit);
+
+ /* if the sizes are greater than 2 or they are not the same regs
+ then we cannot */
+ if (!sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))))
+ return FALSE;
+
+ /* so we know LEFT & RESULT in the same registers and add
+ amount <= 63 */
+ /* for short & char types */
+ if (AOP_SIZE (IC_RESULT (ic)) < 2) {
+ if (icount == 1) {
+ emitcode ("inc", "%s",
+ aopGet (AOP (IC_LEFT (ic)), 0));
+ return TRUE;
+ }
+ if (AOP_ISHIGHREG( AOP (IC_LEFT (ic)),0)) {
+ emitcode ("subi", "%s,<(%d)",
+ aopGet (AOP (IC_LEFT (ic)), 0), 0-icount);
+ return TRUE;
+ }
+ }
+
+ for (offset = 0 ; offset < AOP_SIZE(IC_RESULT(ic)) ; offset++) {
+ if (!(AOP_ISHIGHREG(AOP(IC_RESULT(ic)),offset))) return FALSE;
+ }
+
+ if (AOP_SIZE (IC_RESULT (ic)) <= 3) {
+ /* if register pair and starts with 26/30 then adiw */
+ if (isRegPair (AOP (IC_RESULT (ic))) && icount > 0
+ && icount < 64
+ && (IS_REGIDX (AOP (IC_RESULT (ic)), R26_IDX) ||
+ IS_REGIDX (AOP (IC_RESULT (ic)), R24_IDX) ||
+ IS_REGIDX (AOP (IC_RESULT (ic)), R30_IDX))) {
+ emitcode ("adiw", "%s,%d",
+ aopGet (AOP (IC_RESULT (ic)), 0), icount);
+ return TRUE;
+ }
+
+ /* use subi */
+ emitcode ("subi", "%s,<(%d)",
+ aopGet (AOP (IC_RESULT (ic)), 0), 0-icount);
+ emitcode ("sbci", "%s,>(%d)",
+ aopGet (AOP (IC_RESULT (ic)), 1), 0-icount);
+ return TRUE;
+ }
+
+ /* for 32 bit longs */
+ emitcode ("subi", "%s,<(%d)", aopGet (AOP (IC_RESULT (ic)), 0),
+ 0-icount);
+ emitcode ("sbci", "%s,>(%d)", aopGet (AOP (IC_RESULT (ic)), 1),
+ 0-icount);
+ emitcode ("sbci", "%s,hlo8(%d)", aopGet (AOP (IC_RESULT (ic)), 2),
+ 0-icount);
+ emitcode ("sbci", "%s,hhi8(%d)", aopGet (AOP (IC_RESULT (ic)), 3),
+ 0-icount);
+ return TRUE;
+
}
-/*-----------------------------------------------------------------*/
-/* genGetHbit - generates code get highest order bit */
-/*-----------------------------------------------------------------*/
-static void genGetHbit (iCode *ic)
+/* 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)
{
- operand *left, *result;
- 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);
+ 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),
+ GPTRSIZE - 1);
+ }
+
+ 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),
+ 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);
+ }
}
/*-----------------------------------------------------------------*/
-/* AccRol - rotate left accumulator by known count */
+/* genPlus - generates code for addition */
/*-----------------------------------------------------------------*/
-static void AccRol (int shCount)
+static void
+genPlus (iCode * ic)
{
- 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;
- }
+ int size, offset = 0;
+ int samer;
+ char *l;
+
+ /* special cases :- */
+
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RIGHT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), ic, TRUE);
+
+ /* if I can do an increment instead
+ of add then GOOD for ME */
+ if (genPlusIncr (ic) == TRUE)
+ goto release;
+
+ size = getDataSize (IC_RESULT (ic));
+ samer = sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic)));
+
+ while (size--) {
+ if (!samer)
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_LEFT (ic)), offset), offset);
+
+ if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT) {
+
+ if (offset == 0)
+ l = "add";
+ else
+ l = "adc";
+
+ emitcode (l, "%s,%s",
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ else {
+ if (AOP_ISHIGHREG( AOP( IC_RESULT(ic)),offset)) {
+ if (offset == 0)
+ l = "subi";
+ else
+ l = "sbci";
+
+ emitcode (l, "%s,%s(-%d)",
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ larray[offset],
+ (int) floatFromVal (AOP (IC_RIGHT (ic))->
+ aopu.aop_lit));
+ } else {
+ if (offset == 0)
+ l = "add";
+ else
+ l = "adc";
+
+ emitcode (l, "%s,%s",
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ }
+ offset++;
+ }
+
+ 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);
}
/*-----------------------------------------------------------------*/
-/* AccLsh - left shift accumulator by known count */
+/* genMinusDec :- does subtraction with deccrement if possible */
/*-----------------------------------------------------------------*/
-static void AccLsh (int shCount)
+static bool
+genMinusDec (iCode * ic)
{
- 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]);
- }
- }
+ unsigned int icount;
+ int offset ;
+
+ /* 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;
+
+ icount =
+ (unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.
+ aop_lit);
+
+ /* if the sizes are greater than 2 or they are not the same regs
+ then we cannot */
+ if (!sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))))
+ return FALSE;
+
+ /* so we know LEFT & RESULT in the same registers and add
+ amount <= 63 */
+ /* for short & char types */
+ if (AOP_SIZE (IC_RESULT (ic)) < 2) {
+ if (icount == 1) {
+ emitcode ("dec", "%s",
+ aopGet (AOP (IC_LEFT (ic)), 0));
+ return TRUE;
+ }
+ if (AOP_ISHIGHREG( AOP ( IC_LEFT(ic)),0)) {
+ emitcode ("subi", "%s,<(%d)",
+ aopGet (AOP (IC_LEFT (ic)), 0), icount);
+ return TRUE;
+ }
+ }
+
+ for (offset = 0 ; offset < AOP_SIZE(IC_RESULT(ic)) ; offset++) {
+ if (!(AOP_ISHIGHREG(AOP(IC_RESULT(ic)),offset))) return FALSE;
+ }
+
+ if (AOP_SIZE (IC_RESULT (ic)) <= 3) {
+ /* if register pair and starts with 26/30 then adiw */
+ if (isRegPair (AOP (IC_RESULT (ic))) && icount > 0
+ && icount < 64
+ && (IS_REGIDX (AOP (IC_RESULT (ic)), R26_IDX) ||
+ IS_REGIDX (AOP (IC_RESULT (ic)), R24_IDX) ||
+ IS_REGIDX (AOP (IC_RESULT (ic)), R30_IDX))) {
+ emitcode ("sbiw", "%s,%d",
+ aopGet (AOP (IC_RESULT (ic)), 0), icount);
+ return TRUE;
+ }
+
+ /* use subi */
+ emitcode ("subi", "%s,<(%d)",
+ aopGet (AOP (IC_RESULT (ic)), 0), icount);
+ emitcode ("sbci", "%s,>(%d)",
+ aopGet (AOP (IC_RESULT (ic)), 1), icount);
+ return TRUE;
+ }
+ /* for 32 bit longs */
+ emitcode ("subi", "%s,<(%d)", aopGet (AOP (IC_RESULT (ic)), 0),
+ icount);
+ emitcode ("sbci", "%s,>(%d)", aopGet (AOP (IC_RESULT (ic)), 1),
+ icount);
+ emitcode ("sbci", "%s,hlo8(%d)", aopGet (AOP (IC_RESULT (ic)), 2),
+ icount);
+ emitcode ("sbci", "%s,hhi8(%d)", aopGet (AOP (IC_RESULT (ic)), 3),
+ icount);
+ return TRUE;
+
}
/*-----------------------------------------------------------------*/
-/* AccRsh - right shift accumulator by known count */
+/* genMinus - generates code for subtraction */
/*-----------------------------------------------------------------*/
-static void AccRsh (int shCount)
+static void
+genMinus (iCode * ic)
{
- 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]);
- }
- }
+ int size, offset = 0, samer;
+ char *l;
+
+ aopOp (IC_LEFT (ic), ic, FALSE);
+ aopOp (IC_RIGHT (ic), ic, FALSE);
+ aopOp (IC_RESULT (ic), 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));
+ samer = sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic)));
+ while (size--) {
+ if (!samer)
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_LEFT (ic)), offset), offset);
+
+ if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT) {
+
+ if (offset == 0)
+ l = "sub";
+ else
+ l = "sbc";
+
+ emitcode (l, "%s,%s",
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ else {
+ if (AOP_ISHIGHREG(AOP (IC_RESULT (ic)),offset)) {
+ if (offset == 0)
+ l = "subi";
+ else
+ l = "sbci";
+
+ emitcode (l, "%s,%s(%d)",
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ larray[offset],
+ (int) floatFromVal (AOP (IC_RIGHT (ic))->
+ aopu.aop_lit));
+ } else {
+ if (offset == 0)
+ l = "sub";
+ else
+ l = "sbc";
+
+ emitcode (l, "%s,%s",
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ }
+ offset++;
+ }
+
+ 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);
}
/*-----------------------------------------------------------------*/
-/* AccSRsh - signed right shift accumulator by known count */
+/* genMultOneByte : 8 bit multiplication & division */
/*-----------------------------------------------------------------*/
-static void AccSRsh (int shCount)
+static void
+genMultOneByte (operand * left, operand * right, operand * result)
{
- 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);
- }
- }
+ sym_link *opetype = operandType (result);
+ symbol *lbl;
+ int size, offset;
+
+ /* (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;
+ }
+
+ size = AOP_SIZE (result);
+
+ if (SPEC_USIGN (opetype)) {
+ emitcode ("mul", "%s,%s", aopGet (AOP (left), 0),
+ aopGet (AOP (right), 0));
+ }
+ else {
+ emitcode ("muls", "%s,%s", aopGet (AOP (left), 0),
+ aopGet (AOP (right), 0));
+ }
+ aopPut (AOP (result), "r0", 0);
+ if (size > 1) {
+ aopPut (AOP (result), "r1", 1);
+ offset = 2;
+ size -= 2;
+ if (SPEC_USIGN (opetype)) {
+ while (size--) {
+ aopPut (AOP (result), zero, offset++);
+ }
+ }
+ else {
+ if (size) {
+ lbl = newiTempLabel (NULL);
+ emitcode ("ldi", "r24,0");
+ emitcode ("brcc", "L%05d", lbl->key);
+ emitcode ("ldi", "r24,0xff)");
+ emitcode ("", "L%05d:", lbl->key);
+ while (size--)
+ aopPut (AOP (result), "r24",
+ offset++);
+ }
+ }
+ }
+ return;
}
/*-----------------------------------------------------------------*/
-/* shiftR1Left2Result - shift right one byte from left to result */
+/* genMult - generates code for multiplication */
/*-----------------------------------------------------------------*/
-static void shiftR1Left2Result (operand *left, int offl,
- operand *result, int offr,
- int shCount, int sign)
+static void
+genMult (iCode * ic)
{
- MOVA(aopGet(AOP(left),offl,FALSE,FALSE));
- /* shift right accumulator */
- if(sign)
- AccSRsh(shCount);
- else
- AccRsh(shCount);
- aopPut(AOP(result),"a",offr);
+ 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);
+
+ /* if both are of size == 1 */
+ if (AOP_SIZE (left) == 1 && AOP_SIZE (right) == 1) {
+ genMultOneByte (left, right, result);
+ goto release;
+ }
+
+ /* should have been converted to function call */
+ assert (0);
+
+ release:
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* shiftL1Left2Result - shift left one byte from left to result */
+/* genDiv - generates code for division */
/*-----------------------------------------------------------------*/
-static void shiftL1Left2Result (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+genDiv (iCode * ic)
{
- char *l;
- l = aopGet(AOP(left),offl,FALSE,FALSE);
- MOVA(l);
- /* shift left accumulator */
- AccLsh(shCount);
- aopPut(AOP(result),"a",offr);
+ /* should have been converted to function call */
+ assert (0);
}
/*-----------------------------------------------------------------*/
-/* movLeft2Result - move byte from left to result */
+/* genMod - generates code for division */
/*-----------------------------------------------------------------*/
-static void movLeft2Result (operand *left, int offl,
- operand *result, int offr, int sign)
+static void
+genMod (iCode * ic)
{
- 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);
- }
- }
- }
- }
+ /* should have been converted to function call */
+ assert (0);
+
}
+enum {
+ AVR_EQ = 0,
+ AVR_NE,
+ AVR_LT,
+ AVR_GE
+};
+
/*-----------------------------------------------------------------*/
-/* AccAXRrl1 - right rotate c->a:x->c by 1 */
+/* revavrcnd - reverse a conditional for avr */
/*-----------------------------------------------------------------*/
-static void AccAXRrl1 (char *x)
+static int
+revavrcnd (int type)
{
- emitcode("rrc","a");
- emitcode("xch","a,%s", x);
- emitcode("rrc","a");
- emitcode("xch","a,%s", x);
+ static struct {
+ int type, rtype;
+ } rar[] = {
+ {
+ AVR_EQ, AVR_NE}
+ , {
+ AVR_LT, AVR_GE}
+ };
+ int i;
+
+ for (i = 0; i < (sizeof (rar) / sizeof (rar[0])); i++) {
+ if (rar[i].type == type)
+ return rar[i].rtype;
+ if (rar[i].rtype == type)
+ return rar[i].type;
+ }
+ assert (0); /* cannot happen */
+ return 0; /* makes the compiler happy */
}
+static char *br_name[4] = { "breq", "brne", "brlt", "brge" };
+static char *br_uname[4] = { "breq", "brne", "brlo", "brcc" };
+
/*-----------------------------------------------------------------*/
-/* AccAXLrl1 - left rotate c<-a:x<-c by 1 */
+/* genBranch - generate the branch instruction */
/*-----------------------------------------------------------------*/
-static void AccAXLrl1 (char *x)
+static void
+genBranch (iCode * ifx, int br_type, int sign)
{
- emitcode("xch","a,%s",x);
- emitcode("rlc","a");
- emitcode("xch","a,%s",x);
- emitcode("rlc","a");
+ int tj = (IC_TRUE (ifx) ? 1 : 0);
+
+ if (tj) { /* if true jump */
+ char *nm = (sign ? br_name[br_type] : br_uname[br_type]);
+ emitcode (nm, "L%05d", IC_TRUE (ifx)->key);
+ }
+ else { /* if false jump */
+ int rtype = revavrcnd (br_type);
+ char *nm = (sign ? br_name[rtype] : br_uname[rtype]);
+ emitcode (nm, "L%05d", IC_FALSE (ifx)->key);
+ }
+ ifx->generated = 1;
}
/*-----------------------------------------------------------------*/
-/* AccAXLsh1 - left shift a:x<-0 by 1 */
+/* genCmp - compare & jump */
/*-----------------------------------------------------------------*/
-static void AccAXLsh1 (char *x)
+static void
+genCmp (iCode * ic, iCode * ifx, int br_type)
{
- emitcode("xch","a,%s",x);
- emitcode("add","a,acc");
- emitcode("xch","a,%s",x);
- emitcode("rlc","a");
+ operand *left, *right, *result;
+ sym_link *letype, *retype;
+ symbol *lbl;
+ int sign, size, offset = 0;
+
+ 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);
+ size = AOP_SIZE (left);
+
+ if (ifx) {
+ if (size == 1) {
+ if (AOP_TYPE (right) == AOP_LIT) {
+ emitcode ("cpi", "%s,<(%d)",
+ aopGet (AOP (left), 0),
+ (int)
+ floatFromVal (AOP (IC_RIGHT (ic))->
+ aopu.aop_lit));
+ genBranch (ifx, br_type, sign);
+ }
+ else { /* right != literal */
+ emitcode ("cp", "%s,%s",
+ aopGet (AOP (left), 0),
+ aopGet (AOP (right), 0));
+ genBranch (ifx, br_type, sign);
+ }
+ }
+ else { /* size != 1 */
+ while (size--) {
+ if (offset == 0)
+ emitcode ("cp", "%s,%s",
+ aopGet (AOP (left), 0),
+ aopGet (AOP (right), 0));
+ else
+ emitcode ("cpc", "%s,%s",
+ aopGet (AOP (left), offset),
+ aopGet (AOP (right),
+ offset));
+ offset++;
+ }
+ genBranch (ifx, br_type, sign);
+ }
+ }
+ else { /* no ifx */
+ emitcode ("clr", "r0");
+ while (size--) {
+ if (offset == 0)
+ emitcode ("cp", "%s,%s",
+ aopGet (AOP (left), 0),
+ aopGet (AOP (right), 0));
+ else
+ emitcode ("cpc", "%s,%s",
+ aopGet (AOP (left), offset),
+ aopGet (AOP (right), offset));
+ offset++;
+ }
+ lbl = newiTempLabel (NULL);
+ br_type = revavrcnd (br_type);
+ if (sign)
+ emitcode (br_uname[br_type], "L%05d", lbl->key);
+ else
+ emitcode (br_name[br_type], "L%05d", lbl->key);
+ emitcode ("inc", "r0");
+ emitcode ("", "L%05d:", lbl->key);
+ aopPut (AOP (result), "r0", 0);
+ size = AOP_SIZE (result) - 1;
+ offset = 1;
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+ }
+
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* AccAXLsh - left shift a:x by known count (0..7) */
+/* genCmpGt :- greater than comparison */
/*-----------------------------------------------------------------*/
-static void AccAXLsh (char *x, int shCount)
+static void
+genCmpGt (iCode * ic, iCode * ifx)
{
- 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;
- }
+ /* should have transformed by the parser */
+ assert (0);
}
/*-----------------------------------------------------------------*/
-/* 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;
- }
-}
-
+/* genCmpLt - less than comparisons */
/*-----------------------------------------------------------------*/
-/* 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;
- }
+static void
+genCmpLt (iCode * ic, iCode * ifx)
+{
+ genCmp (ic, ifx, AVR_LT);
}
/*-----------------------------------------------------------------*/
-/* shiftL2Left2Result - shift left two bytes from left to result */
+/* genCmpEq - generates code for equal to */
/*-----------------------------------------------------------------*/
-static void shiftL2Left2Result (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+genCmpEq (iCode * ic, iCode * ifx)
{
- 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);
+ genCmp (ic, ifx, AVR_EQ);
}
-
/*-----------------------------------------------------------------*/
-/* shiftR2Left2Result - shift right two bytes from left to result */
+/* genCmpNe - generates code for not equal to */
/*-----------------------------------------------------------------*/
-static void shiftR2Left2Result (operand *left, int offl,
- operand *result, int offr,
- int shCount, int sign)
+static void
+genCmpNe (iCode * ic, iCode * ifx)
{
- 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));
- }
- /* 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);
+ genCmp (ic, ifx, AVR_NE);
}
/*-----------------------------------------------------------------*/
-/* shiftLLeftOrResult - shift left one byte from left, or to result*/
+/* genCmpGe - generates code for greater than equal to */
/*-----------------------------------------------------------------*/
-static void shiftLLeftOrResult (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+genCmpGe (iCode * ic, iCode * ifx)
{
- 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);
+ genCmp (ic, ifx, AVR_GE);
}
/*-----------------------------------------------------------------*/
-/* shiftRLeftOrResult - shift right one byte from left,or to result*/
+/* genCmpLe - generates code for less than equal to */
/*-----------------------------------------------------------------*/
-static void shiftRLeftOrResult (operand *left, int offl,
- operand *result, int offr, int shCount)
+static void
+genCmpLe (iCode * ic, iCode * ifx)
{
- 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);
-}
+ operand *left = IC_LEFT (ic);
+ operand *right = IC_RIGHT (ic);
-/*-----------------------------------------------------------------*/
-/* 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);
+ IC_RIGHT (ic) = left;
+ IC_LEFT (ic) = right;
+ genCmp (ic, ifx, AVR_GE);
}
/*-----------------------------------------------------------------*/
-/* genlshTwo - left shift two bytes by known amount != 0 */
+/* ifxForOp - returns the icode containing the ifx for operand */
/*-----------------------------------------------------------------*/
-static void genlshTwo (operand *result,operand *left, int shCount)
+static iCode *
+ifxForOp (operand * op, iCode * ic)
{
- int size;
-
- 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);
- }
-
- /* 1 <= shCount <= 7 */
- else {
- if(size == 1)
- shiftL1Left2Result(left, LSB, result, LSB, shCount);
- else
- shiftL2Left2Result(left, LSB, result, LSB, shCount);
- }
+ /* 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;
}
/*-----------------------------------------------------------------*/
-/* shiftLLong - shift left one long from left to result */
-/* offl = LSB or MSB16 */
+/* genAndOp - for && operation */
/*-----------------------------------------------------------------*/
-static void shiftLLong (operand *left, operand *result, int offr )
+static void
+genAndOp (iCode * ic)
{
- 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);
- }
- 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);
- }
-
- 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);
- }
-
- 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);
- }
- if(offr != LSB)
- aopPut(AOP(result),zero,LSB);
+ operand *left, *right, *result;
+ symbol *tlbl;
+ int size, offset;
+
+ /* 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);
+
+ tlbl = newiTempLabel (NULL);
+ toBoolean (left, "r0", TRUE);
+ toBoolean (right, "r1", TRUE);
+ emitcode ("and", "r0,r1");
+ emitcode ("ldi", "r24,1");
+ emitcode ("breq", "L%05d", tlbl->key);
+ emitcode ("dec", "r24");
+ emitcode ("", "L%05d:", tlbl->key);
+ aopPut (AOP (result), "r24", 0);
+ size = AOP_SIZE (result) - 1;
+ offset = 1;
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
+
/*-----------------------------------------------------------------*/
-/* genlshFour - shift four byte by a known amount != 0 */
+/* genOrOp - for || operation */
/*-----------------------------------------------------------------*/
-static void genlshFour (operand *result, operand *left, int shCount)
+static void
+genOrOp (iCode * ic)
{
- 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);
- }
- }
- }
-
- /* 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);
- }
+ operand *left, *right, *result;
+ symbol *tlbl;
+ int size, offset;
+
+ /* 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);
+
+ tlbl = newiTempLabel (NULL);
+ toBoolean (left, "r0", TRUE);
+ toBoolean (right, "r0", FALSE);
+ emitcode ("ldi", "r24,1");
+ emitcode ("breq", "L%05d", tlbl->key);
+ emitcode ("dec", "r24");
+ emitcode ("", "L%05d:", tlbl->key);
+ aopPut (AOP (result), "r24", 0);
+ size = AOP_SIZE (result) - 1;
+ offset = 1;
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
+enum {
+ AVR_AND = 0, AVR_OR, AVR_XOR
+};
+static char *bopnames_lit[] = { "andi", "ori" };
+static char *bopnames[] = { "and", "or", "eor" };
/*-----------------------------------------------------------------*/
-/* genLeftShiftLiteral - left shifting by known count */
+/* genBitWise - generate bitwise operations */
/*-----------------------------------------------------------------*/
-static void genLeftShiftLiteral (operand *left,
- operand *right,
- operand *result,
- iCode *ic)
-{
- int shCount = (int) floatFromVal (AOP(right)->aopu.aop_lit);
- int size;
-
- freeAsmop(right,NULL,ic,TRUE);
-
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
+static void
+genBitWise (iCode * ic, iCode * ifx, int bitop)
+{
+ operand *left, *right, *result;
+ int size, offset = 0;
+ char *l;
+ symbol *lbl, *lbl1;
+ int samerl, samerr;
- size = getSize(operandType(result));
+ aopOp ((left = IC_LEFT (ic)), ic, FALSE);
+ aopOp ((right = IC_RIGHT (ic)), ic, FALSE);
+ aopOp ((result = IC_RESULT (ic)), ic, TRUE);
-#if VIEW_SIZE
- emitcode("; shift left ","result %d, left %d",size,
- AOP_SIZE(left));
-#endif
+ size = AOP_SIZE (left);
+ offset = 0;
+ if (ifx) { /* used only for jumps */
+ if (AOP_TYPE (right) == AOP_LIT &&
+ (bitop == AVR_AND || bitop == AVR_OR)) {
+ int lit =
+ (int) floatFromVal (AOP (right)->aopu.
+ aop_lit);
+ int p2 = powof2 (lit);
+ if (bitop == AVR_AND && (p2 >= 0)) { /* right side is a power of 2 */
+ l = aopGet (AOP (left), p2 / 8);
+ if (IC_TRUE (ifx)) {
+ emitcode ("sbrc", "%s,%d", l,
+ (p2 % 8));
+ emitcode ("rjmp", "L%05d",
+ IC_TRUE (ifx)->key);
+ }
+ else {
+ emitcode ("sbrs", "%s,%d", l,
+ (p2 % 8));
+ emitcode ("rjmp", "L%05d",
+ IC_FALSE (ifx)->key);
+ }
+ }
+ else { /* right not power of two */
+ int eh = OP_SYMBOL (left)->liveTo <= ic->seq;
+ if (size == 1) {
+ if (eh && AOP_ISHIGHREG(AOP(IC_LEFT(ic)),0)) {
+ emitcode (bopnames_lit[bitop],
+ "%s,<(%d)",
+ aopGet (AOP (IC_LEFT (ic)), 0), lit);
+ }
+ else {
+ MOVR24 (aopGet (AOP (IC_LEFT (ic)), 0));
+ emitcode (bopnames_lit[bitop], "r24,<(%d)", lit);
+ }
+ lbl = newiTempLabel (NULL);
+ if (IC_TRUE (ifx)) {
+ emitcode ("breq", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d", IC_TRUE (ifx)->key);
+ }
+ else {
+ emitcode ("brne", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d", IC_FALSE (ifx)-> key);
+ }
+ emitcode ("", "L%05d:", lbl->key);
+ }
+ else if (size == 2) {
+ emitcode ("mov", "r24,%s", aopGet (AOP (IC_LEFT (ic)), 0));
+ emitcode ("mov", "r25,%s", aopGet (AOP (IC_LEFT (ic)), 1));
+ emitcode (bopnames_lit[bitop], "r24,<(%d)", lit);
+ emitcode (bopnames_lit[bitop], "r25,>(%d)", lit);
+ emitcode ("sbiw", "r24,0");
+ lbl = newiTempLabel (NULL);
+ if (IC_TRUE (ifx)) {
+ emitcode ("breq", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d", IC_TRUE (ifx)->key);
+ }
+ else {
+ emitcode ("brne", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d", IC_FALSE (ifx)->key);
+ }
+ emitcode ("", "L%05d:", lbl->key);
+ }
+ else {
+ lbl = newiTempLabel (NULL);
+ lbl1 = newiTempLabel (NULL);
+ while (size--) {
+ if (eh && AOP_ISHIGHREG(AOP(IC_LEFT(ic)),offset)) {
+ emitcode (bopnames_lit [bitop], "%s,<(%d)",
+ aopGet (AOP (IC_LEFT (ic)), offset),
+ lit);
+ }
+ else {
+ char *l = aopGet (AOP (IC_LEFT (ic)), offset);
+ MOVR24 (l);
+ emitcode ("andi", "r24,<(%d)", lit);
+ }
+ emitcode ("brne", "L%05d", lbl->key);
+ offset++;
+ }
+ /* all are zero */
+ if (IC_FALSE (ifx))
+ emitcode ("rjmp", "L%05d", IC_FALSE (ifx)-> key);
+ else
+ emitcode ("rjmp", "L%05d", lbl1->key);
+ emitcode ("", "L%05d:", lbl->key);
+ /* not zero */
+ if (IC_TRUE (ifx))
+ emitcode ("rjmp", "L%05d", IC_TRUE (ifx)->key);
+ emitcode ("", "L%05d:", lbl1->key);
+
+ }
+ }
+ }
+ else { /* right is not a literal */
+ int eh = OP_SYMBOL (left)->liveTo <= ic->seq;
+ int reh = OP_SYMBOL (right)->liveTo <= ic->seq;
+ if (size == 1) {
+ if (eh) {
+ emitcode (bopnames[bitop], "%s,%s", aopGet (AOP (IC_LEFT (ic)), 0),
+ aopGet (AOP (IC_RIGHT (ic)), 0));
+ }
+ else if (reh) {
+ emitcode (bopnames[bitop], "%s,%s",
+ aopGet (AOP (IC_RIGHT (ic)), 0),
+ aopGet (AOP (IC_LEFT (ic)), 0));
+ }
+ else {
+ MOVR0 (aopGet (AOP (IC_LEFT (ic)), 0));
+ emitcode (bopnames[bitop], "r0,%s",
+ aopGet (AOP (IC_RIGHT (ic)), 0));
+ }
+ lbl = newiTempLabel (NULL);
+ if (IC_TRUE (ifx)) {
+ emitcode ("breq", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d",
+ IC_TRUE (ifx)->key);
+ }
+ else {
+ emitcode ("brne", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d",
+ IC_FALSE (ifx)->key);
+ }
+ emitcode ("", "L%05d:", lbl->key);
+ }
+ else if (size == 2) {
+ emitcode ("mov", "r24,%s",
+ aopGet (AOP (IC_LEFT (ic)), 0));
+ emitcode ("mov", "r25,%s",
+ aopGet (AOP (IC_LEFT (ic)), 1));
+ emitcode (bopnames[bitop], "r24,%s",
+ aopGet (AOP (IC_RIGHT (ic)), 0));
+ emitcode (bopnames[bitop], "r25,%s",
+ aopGet (AOP (IC_RIGHT (ic)), 1));
+ emitcode ("sbiw", "r24,0");
+ lbl = newiTempLabel (NULL);
+ if (IC_TRUE (ifx)) {
+ emitcode ("breq", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d", IC_TRUE (ifx)->key);
+ }
+ else {
+ emitcode ("brne", "L%05d", lbl->key);
+ emitcode ("rjmp", "L%05d", IC_FALSE (ifx)->key);
+ }
+ emitcode ("", "L%05d:", lbl->key);
+ }
+ else {
+ lbl = newiTempLabel (NULL);
+ lbl1 = newiTempLabel (NULL);
+ while (size--) {
+ if (eh) {
+ emitcode (bopnames[bitop], "%s,%s",
+ aopGet (AOP (IC_LEFT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ else if (reh) {
+ emitcode (bopnames[bitop], "%s,%s",
+ aopGet (AOP (IC_RIGHT (ic)), offset),
+ aopGet (AOP (IC_LEFT (ic)), offset));
+ }
+ else {
+ MOVR0 (aopGet (AOP (IC_LEFT (ic)), offset));
+ emitcode (bopnames[bitop], "r0,%s",
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ emitcode ("brne", "L%05d", lbl->key);
+ offset++;
+ }
+ /* all are zero */
+ if (IC_FALSE (ifx))
+ emitcode ("rjmp", "L%05d", IC_FALSE (ifx)->key);
+ else
+ emitcode ("rjmp", "L%05d", lbl1->key);
+ emitcode ("", "L%05d:", lbl->key);
+ /* not zero */
+ if (IC_TRUE (ifx))
+ emitcode ("rjmp", "L%05d", IC_TRUE (ifx)->key);
+ emitcode ("", "L%05d:", lbl1->key);
+
+ }
+ }
+ goto release;
+ }
- /* 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;
- }
- }
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ /* result needs to go a register */
+ samerl = sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic)));
+ samerr = sameRegs (AOP (IC_RESULT (ic)), AOP (IC_RIGHT (ic)));
+ while (size--) {
+ if (AOP_TYPE (right) == AOP_LIT) {
+ unsigned int lit =
+ (int) floatFromVal (AOP (right)->aopu.
+ aop_lit);
+ if (((lit >> (8 * offset)) & 0xff) == 0) {
+ if (bitop == AVR_AND) {
+ aopPut (AOP (result), zero, offset++);
+ continue;
+ }
+ else if (bitop == AVR_OR) {
+ if (!samerl)
+ aopPut (AOP (result),
+ aopGet (AOP (left),
+ offset),
+ offset);
+ offset++;
+ continue;
+ }
+ }
+ }
+ if (samerl) {
+ if (AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT &&
+ AOP_ISHIGHREG(AOP(IC_LEFT(ic)),offset) &&
+ (bitop == AVR_AND || bitop == AVR_OR)) {
+ emitcode (bopnames_lit[bitop], "%s,%s(%d)",
+ aopGet (AOP (IC_LEFT (ic)), offset),
+ larray[offset],
+ (int) floatFromVal (AOP (right)-> aopu.aop_lit));
+ }
+ else {
+ emitcode (bopnames[bitop], "%s,%s",
+ aopGet (AOP (IC_LEFT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ }
+ else if (samerr) {
+ emitcode (bopnames[bitop], "%s,%s",
+ aopGet (AOP (IC_RIGHT (ic)), offset),
+ aopGet (AOP (IC_LEFT (ic)), offset));
+ }
+ else {
+ aopPut (AOP (IC_RESULT (ic)),
+ aopGet (AOP (IC_LEFT (ic)), offset), offset);
+ emitcode (bopnames[bitop],
+ aopGet (AOP (IC_RESULT (ic)), offset),
+ aopGet (AOP (IC_RIGHT (ic)), offset));
+ }
+ offset++;
+ }
+ release:
+ freeAsmop (left, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (right, NULL, ic, (RESULTONSTACK (ic) ? FALSE : TRUE));
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genLeftShift - generates code for left shifting */
+/* genAnd - code for and */
/*-----------------------------------------------------------------*/
-static void genLeftShift (iCode *ic)
+static void
+genAnd (iCode * ic, iCode * ifx)
{
- 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++;
- }
- }
-
- 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$",tlbl->key+100);
- aopPut(AOP(result),"a",0);
- goto release ;
- }
-
- reAdjustPreg(AOP(result));
-
- emitcode("sjmp","%05d$",tlbl1->key+100);
- emitcode("","%05d$:",tlbl->key+100);
- l = aopGet(AOP(result),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("add","a,acc");
- aopPut(AOP(result),"a",offset++);
- while (--size) {
- l = aopGet(AOP(result),offset,FALSE,FALSE);
- MOVA(l);
- emitcode("rlc","a");
- aopPut(AOP(result),"a",offset++);
- }
- reAdjustPreg(AOP(result));
-
- emitcode("","%05d$:",tlbl1->key+100);
- emitcode("djnz","b,%05d$",tlbl->key+100);
-release:
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ genBitWise (ic, ifx, AVR_AND);
}
/*-----------------------------------------------------------------*/
-/* genrshOne - right shift a one byte quantity by known count */
+/* genOr - code for or */
/*-----------------------------------------------------------------*/
-static void genrshOne (operand *result, operand *left,
- int shCount, int sign)
+static void
+genOr (iCode * ic, iCode * ifx)
{
- shiftR1Left2Result(left, LSB, result, LSB, shCount, sign);
+ genBitWise (ic, ifx, AVR_OR);
}
/*-----------------------------------------------------------------*/
-/* genrshTwo - right shift two bytes by known amount != 0 */
+/* genXor - code for xclusive or */
/*-----------------------------------------------------------------*/
-static void genrshTwo (operand *result,operand *left,
- int shCount, int sign)
+static void
+genXor (iCode * ic, iCode * ifx)
{
- /* 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);
+ genBitWise (ic, ifx, AVR_XOR);
}
/*-----------------------------------------------------------------*/
-/* shiftRLong - shift right one long from left to result */
-/* offl = LSB or MSB16 */
+/* genInline - write the inline code out */
/*-----------------------------------------------------------------*/
-static void shiftRLong (operand *left, int offl,
- operand *result, int sign)
+static void
+genInline (iCode * ic)
{
- 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);
-
- MOVA(aopGet(AOP(left),MSB24,FALSE,FALSE));
- emitcode("rrc","a");
- aopPut(AOP(result),"a",MSB24-offl);
-
- 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);
- }
+ char *buffer, *bp, *bp1;
+
+ _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);
}
/*-----------------------------------------------------------------*/
-/* genrshFour - shift four byte by a known amount != 0 */
+/* genRotC - rotate right/left with carry , lr = 1 rotate right */
/*-----------------------------------------------------------------*/
-static void genrshFour (operand *result, operand *left,
- int shCount, int sign)
+static void
+genRotC (iCode * ic, int lr)
{
- /* 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);
- }
- }
- 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);
- }
- }
-}
-
+ operand *left, *result;
+ int size, offset = 0;
+
+ /* 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);
+ if (!sameRegs (AOP (left), AOP (result))) {
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ size = AOP_SIZE (result);
+ }
+ if (lr)
+ offset = size - 1;
+ else
+ offset = 0;
+
+ CLRC;
+ emitcode ("sbrc", "%s,%d", aopGet (AOP (result), offset),
+ (lr ? 0 : 7));
+ emitcode ("sec", "");
+
+ while (size--) {
+ emitcode ((lr ? "ror" : "rol"), "%s",
+ aopGet (AOP (result), offset));
+ if (lr)
+ offset--;
+ else
+ offset++;
+ }
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
/*-----------------------------------------------------------------*/
-/* genRightShiftLiteral - right shifting by known count */
+/* genRRC - rotate right with carry */
/*-----------------------------------------------------------------*/
-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
+genRRC (iCode * ic)
+{
+ genRotC (ic, 1);
+}
- freeAsmop(right,NULL,ic,TRUE);
+/*-----------------------------------------------------------------*/
+/* genRLC - generate code for rotate left with carry */
+/*-----------------------------------------------------------------*/
+static void
+genRLC (iCode * ic)
+{
+ genRotC (ic, 0);
+}
- aopOp(left,ic,FALSE);
- aopOp(result,ic,FALSE);
+/*-----------------------------------------------------------------*/
+/* genGetHbit - generates code get highest order bit */
+/*-----------------------------------------------------------------*/
+static void
+genGetHbit (iCode * ic)
+{
+ operand *left, *result;
+ int size, offset;
+
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ size = AOP_SIZE (result);
+ if (!sameRegs (AOP (left), AOP (result))) {
+ emitcode ("clr", "%s", aopGet (AOP (result), size - 1));
+ emitcode ("sbrc", "%s,7", aopGet (AOP (left), size - 1));
+ emitcode ("subi", "%s,<(-1)",
+ aopGet (AOP (result), size - 1));
+ }
+ else {
+ emitcode ("clr", "r0");
+ emitcode ("sbrc", "%s,7", aopGet (AOP (left), size - 1));
+ emitcode ("subi", "r0,<(-1)");
+ aopPut (AOP (result), "r0", 0);
+ }
+ offset = 1;
+ size--;
+ while (size--) {
+ emitcode ("clr", aopGet (AOP (result), offset++));
+ }
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
-#if VIEW_SIZE
- emitcode("; shift right ","result %d, left %d",AOP_SIZE(result),
- AOP_SIZE(left));
-#endif
+/*-----------------------------------------------------------------*/
+/* genShiftLeftLit - shift left by a known amount */
+/*-----------------------------------------------------------------*/
+static void
+genShiftLeftLit (iCode * ic)
+{
+ operand *left, *right, *result;
+ int size, shCount, offset = 0;
+ int lByteZ = 0;
+
+ right = IC_RIGHT (ic);
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+ size = AOP_SIZE (result);
+ shCount = (int) floatFromVal (AOP (right)->aopu.aop_lit);
+
+ if (shCount > (size * 8 - 1)) {
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+ goto release;
+ }
+ switch (size) {
+ case 1:
+ if (!sameRegs (AOP (left), AOP (result)))
+ aopPut (AOP (result), aopGet (AOP (left), 0), 0);
+ if (shCount >= 4) {
+ if (AOP_ISHIGHREG(AOP(result),0)) {
+ emitcode ("swap", "%s", aopGet (AOP (result), 0));
+ emitcode ("andi", "%s,0xf0");
+ } else {
+ emitcode ("ldi","r24,0xf0");
+ emitcode ("swap", "%s", aopGet (AOP (result), 0));
+ emitcode ("and", "%s,r24");
+ }
+ shCount -= 4;
+ }
+ if (shCount == 1) {
+ emitcode ("add", "%s,%s", aopGet (AOP (result), 0),
+ aopGet (AOP (result), 0));
+ shCount--;
+ }
+ while (shCount--)
+ emitcode ("lsl", "%s", aopGet (AOP (result), 0));
+ break;
+ case 2:
+ if (shCount >= 12) {
+ aopPut (AOP (result), aopGet (AOP (left), 0), 1);
+ aopPut (AOP (result), zero, 0);
+ emitcode ("swap", "%s", aopGet (AOP (result), 1));
+ if (AOP_ISHIGHREG(AOP(result),1)) {
+ emitcode ("andi", "%s,0xf0", aopGet (AOP (result), 1));
+ } else {
+ emitcode ("ldi","r24,0xf0");
+ emitcode ("and", "%s,r24", aopGet (AOP (result), 1));
+ }
+ shCount -= 12;
+ lByteZ = 1;
+ }
+ if (shCount >= 8) {
+ aopPut (AOP (result), aopGet (AOP (left), 0), 1);
+ aopPut (AOP (result), zero, 0);
+ shCount -= 8;
+ lByteZ = 1;
+ }
+ if (shCount >= 4) {
+ shCount -= 4;
+ if (!sameRegs (AOP (left), AOP (result))) {
+ aopPut (AOP (result), aopGet (AOP (left), 0),
+ 0);
+ aopPut (AOP (result), aopGet (AOP (left), 1),
+ 1);
+ }
+ emitcode ("mov", "r24,%s", aopGet (AOP (result), 0));
+ emitcode ("andi", "r24,0x0f");
+ if (!(AOP_ISHIGHREG(AOP(result),0) && AOP_ISHIGHREG(AOP(result),1))) {
+ emitcode("ldi","r25,0xf0");
+ }
+ emitcode ("swap", "%s", aopGet (AOP (result), 0));
+ if (AOP_ISHIGHREG(AOP(result),0)) {
+ emitcode ("andi", "%s,0xf0", aopGet (AOP (result), 0));
+ } else {
+ emitcode ("and", "%s,r25", aopGet (AOP (result), 0));
+ }
+ emitcode ("swap", "%s", aopGet (AOP (result), 1));
+ if (AOP_ISHIGHREG(AOP(result),1)) {
+ emitcode ("andi", "%s,0xf0", aopGet (AOP (result), 1));
+ } else {
+ emitcode ("and", "%s,r25", aopGet (AOP (result), 1));
+ }
+ emitcode ("or", "%s,r24", aopGet (AOP (result), 1));
+ while (shCount--) {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 0));
+ emitcode ("rol", "%s", aopGet (AOP (result), 1));
+ }
+ }
+ if (!lByteZ && !sameRegs (AOP (result), AOP (left))
+ && shCount) {
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ }
+ while (shCount--) {
+ if (lByteZ) {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 1));
+ }
+ else {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 0));
+ emitcode ("rol", "%s", aopGet (AOP (result), 1));
+ }
+ }
+ break;
+ case 3:
+ assert ("shifting generic pointer ?\n");
+ break;
+ case 4:
+ /* 32 bits we do only byte boundaries */
+ if (shCount >= 24) {
+ aopPut (AOP (result), aopGet (AOP (left), 0), 3);
+ aopPut (AOP (result), zero, 2);
+ aopPut (AOP (result), zero, 1);
+ aopPut (AOP (result), zero, 0);
+ lByteZ = 3;
+ shCount -= 24;
+ }
+ if (shCount >= 16) {
+ aopPut (AOP (result), aopGet (AOP (left), 0), 3);
+ aopPut (AOP (result), aopGet (AOP (left), 1), 2);
+ aopPut (AOP (result), zero, 1);
+ aopPut (AOP (result), zero, 0);
+ lByteZ = 2;
+ shCount -= 16;
+ }
+ if (shCount >= 8) {
+ aopPut (AOP (result), aopGet (AOP (left), 0), 3);
+ aopPut (AOP (result), aopGet (AOP (left), 1), 2);
+ aopPut (AOP (result), aopGet (AOP (left), 2), 1);
+ aopPut (AOP (result), zero, 0);
+ shCount -= 8;
+ lByteZ = 1;
+ }
+ if (!lByteZ && !sameRegs (AOP (left), AOP (right))) {
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ offset = 0;
+ size = AOP_SIZE (result);
+ }
+ if (shCount) {
+ switch (lByteZ) {
+ case 0:
+ while (shCount--) {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 0));
+ emitcode ("rol", "%s", aopGet (AOP (result), 1));
+ emitcode ("rol", "%s", aopGet (AOP (result), 2));
+ emitcode ("rol", "%s", aopGet (AOP (result), 3));
+ }
+ break;
+ case 1:
+ while (shCount--) {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 1));
+ emitcode ("rol", "%s", aopGet (AOP (result), 2));
+ emitcode ("rol", "%s", aopGet (AOP (result), 3));
+ }
+ break;
+ case 2:
+ while (shCount--) {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 2));
+ emitcode ("rol", "%s", aopGet (AOP (result), 3));
+ }
+ break;
+ case 3:
+ while (shCount--) {
+ emitcode ("lsl", "%s", aopGet (AOP (result), 3));
+ }
+ break;
+ }
+ }
+ }
- 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;
- }
-
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
- }
+ release:
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genSignedRightShift - right shift of signed number */
+/* genLeftShift - generates code for left shifting */
/*-----------------------------------------------------------------*/
-static void genSignedRightShift (iCode *ic)
+static void
+genLeftShift (iCode * ic)
{
- 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 */
-
- 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) {
-
- 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++;
- }
- }
-
- /* 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);
-
-release:
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ operand *left, *right, *result;
+ int size, offset;
+ symbol *tlbl;
+
+ right = IC_RIGHT (ic);
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+
+ aopOp (right, ic, FALSE);
+
+ if (AOP_TYPE (right) == AOP_LIT) {
+ genShiftLeftLit (ic);
+ return;
+ }
+
+ /* unknown count */
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+ size = AOP_SIZE (result);
+ offset = 0;
+ if (AOP_SIZE (right) > 1) {
+ if (isRegPair (AOP (right))) {
+ emitcode ("movw", "r24,%s", aopGet (AOP (right), 0));
+ }
+ else {
+ emitcode ("mov", "r24,%s", aopGet (AOP (right), 0));
+ emitcode ("mov", "r25,%s", aopGet (AOP (right), 1));
+ }
+ }
+ else {
+ emitcode ("mov", "r24,%s", aopGet (AOP (right), 0));
+ }
+ if (!sameRegs (AOP (left), AOP (result))) {
+ while (size--) {
+ aopPut (AOP (result), aopGet (AOP (left), offset),
+ offset);
+ offset++;
+ }
+ size = AOP_SIZE (result);
+ }
+ tlbl = newiTempLabel (NULL);
+ emitcode ("", "L%05d:", tlbl->key);
+ offset = 0;
+ while (size--) {
+ if (offset)
+ emitcode ("rol", "%s", aopGet (AOP (result), offset));
+ else
+ emitcode ("lsl", "%s", aopGet (AOP (result), 0));
+ offset++;
+ }
+ if (AOP_SIZE (right) > 1)
+ emitcode ("sbiw", "r24,1");
+ else
+ emitcode ("dec", "r24");
+ emitcode ("brne", "L%05d", tlbl->key);
+
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genShiftRightLit - generate for right shift with known count */
+/*-----------------------------------------------------------------*/
+static void
+genShiftRightLit (iCode * ic)
+{
+ operand *left = IC_LEFT (ic)
+ , *right = IC_RIGHT (ic)
+ , *result = IC_RESULT (ic);
+ int size, shCount, offset = 0;
+ int hByteZ = 0;
+ sym_link *letype = getSpec (operandType (left));
+ int sign = !SPEC_USIGN (letype);
+
+ right = IC_RIGHT (ic);
+ left = IC_LEFT (ic);
+ result = IC_RESULT (ic);
+
+ aopOp (left, ic, FALSE);
+ aopOp (result, ic, FALSE);
+ size = AOP_SIZE (result);
+ shCount = (int) floatFromVal (AOP (right)->aopu.aop_lit);
+
+ /* if signed then give up and use a loop to shift */
+ if (sign) {
+ symbol *tlbl;
+ if (!sameRegs (AOP (left), AOP (result))) {
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ size = AOP_SIZE (result);
+ offset = 0;
+ }
+ /* be as economical as possible */
+ if (shCount <= 4) {
+ while (shCount--) {
+ size = AOP_SIZE (result);
+ offset = size - 1;
+ while (size--) {
+ /* highest order byte */
+ if (offset == (AOP_SIZE(result)-1))
+ emitcode ("asr", "%s", aopGet (AOP (result), offset));
+ else
+ emitcode ("ror", "%s", aopGet (AOP (result), offset));
+ offset--;
+ }
+ }
+ }
+ else {
+ emitcode ("ldi", "r24,<(%d)", shCount);
+ tlbl = newiTempLabel (NULL);
+ emitcode ("", "L%05d:", tlbl->key);
+ offset = size - 1;
+ while (size--) {
+ if (offset == (AOP_SIZE(result) - 1))
+ emitcode ("asr", "%s", aopGet (AOP (result), offset));
+ else
+ emitcode ("ror", "%s", aopGet (AOP (result), offset));
+ offset--;
+ }
+ emitcode ("dec", "r24");
+ emitcode ("brne", "L%05d", tlbl->key);
+ }
+ goto release;
+ }
+ if (shCount > (size * 8 - 1)) {
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+ goto release;
+ }
+ /* for unsigned we can much more efficient */
+ switch (size) {
+ case 1:
+ if (!sameRegs (AOP (left), AOP (result)))
+ aopPut (AOP (result), aopGet (AOP (left), 0), 0);
+ if (shCount >= 4) {
+ emitcode ("swap", "%s", aopGet (AOP (result), 0));
+ if (AOP_ISHIGHREG(AOP(result),0)) {
+ emitcode ("andi", "%s,0x0f",aopGet(AOP(result),0));
+ } else {
+ emitcode ("ldi","r24,0x0f");
+ emitcode ("and", "%s,r24",aopGet(AOP(result),0));
+ }
+ shCount -= 4;
+ }
+ while (shCount--)
+ emitcode ("lsr", "%s", aopGet (AOP (result), 0));
+ break;
+ case 2:
+ if (shCount >= 12) {
+ aopPut (AOP (result), aopGet (AOP (left), 1), 0);
+ aopPut (AOP (result), zero, 1);
+ emitcode ("swap", "%s", aopGet (AOP (result), 0));
+ if (AOP_ISHIGHREG(AOP(result),0)) {
+ emitcode ("andi", "%s,0x0f", aopGet (AOP (result), 0));
+ } else {
+ emitcode ("ldi","r24,0x0f");
+ emitcode ("and", "%s,r24",aopGet(AOP(result),0));
+ }
+ shCount -= 12;
+ hByteZ = 1;
+ }
+ if (shCount >= 8) {
+ aopPut (AOP (result), aopGet (AOP (left), 1), 0);
+ aopPut (AOP (result), zero, 1);
+ shCount -= 8;
+ hByteZ = 1;
+ }
+ if (shCount >= 4) {
+ shCount -= 4;
+ if (!sameRegs (AOP (left), AOP (result))) {
+ aopPut (AOP (result), aopGet (AOP (left), 0), 0);
+ aopPut (AOP (result), aopGet (AOP (left), 1), 1);
+ }
+ if (!(AOP_ISHIGHREG(AOP(result),0) && AOP_ISHIGHREG(AOP(result),1))) {
+ emitcode("ldi","r25,0x0f");
+ }
+ emitcode ("mov", "r24,%s", aopGet (AOP (result), 1));
+ emitcode ("andi", "r24,0xf0");
+ emitcode ("swap", "%s", aopGet (AOP (result), 0));
+ if (AOP_ISHIGHREG(AOP(result),0)) {
+ emitcode ("andi", "%s,0x0f", aopGet (AOP (result), 0));
+ } else {
+ emitcode ("and", "%s,r25", aopGet (AOP (result), 0));
+ }
+ emitcode ("or", "%s,r24", aopGet (AOP (result), 0));
+ emitcode ("swap", "%s", aopGet (AOP (result), 1));
+ if (AOP_ISHIGHREG(AOP(result),1)) {
+ emitcode ("andi", "%s,0x0f", aopGet (AOP (result), 1));
+ } else {
+ emitcode ("and", "%s,r24", aopGet (AOP (result), 1));
+ }
+ while (shCount--) {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 1));
+ emitcode ("ror", "%s", aopGet (AOP (result), 0));
+ }
+
+ }
+ if (!hByteZ && !sameRegs (AOP (result), AOP (left))
+ && shCount) {
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result), aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ }
+ while (shCount--) {
+ if (hByteZ) {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 0));
+ }
+ else {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 1));
+ emitcode ("ror", "%s", aopGet (AOP (result), 0));
+ }
+ }
+ break;
+
+ case 3:
+ assert ("shifting generic pointer ?\n");
+ break;
+ case 4:
+ /* 32 bits we do only byte boundaries */
+ if (shCount >= 24) {
+ aopPut (AOP (result), aopGet (AOP (left), 3), 0);
+ aopPut (AOP (result), zero, 1);
+ aopPut (AOP (result), zero, 2);
+ aopPut (AOP (result), zero, 3);
+ hByteZ = 3;
+ shCount -= 24;
+ }
+ if (shCount >= 16) {
+ aopPut (AOP (result), aopGet (AOP (left), 3), 1);
+ aopPut (AOP (result), aopGet (AOP (left), 2), 0);
+ aopPut (AOP (result), zero, 2);
+ aopPut (AOP (result), zero, 3);
+ hByteZ = 2;
+ shCount -= 16;
+ }
+ if (shCount >= 8) {
+ aopPut (AOP (result), aopGet (AOP (left), 1), 0);
+ aopPut (AOP (result), aopGet (AOP (left), 2), 1);
+ aopPut (AOP (result), aopGet (AOP (left), 3), 2);
+ aopPut (AOP (result), zero, 3);
+ shCount -= 8;
+ hByteZ = 1;
+ }
+ if (!hByteZ && !sameRegs (AOP (left), AOP (right))) {
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ offset = 0;
+ size = AOP_SIZE (result);
+ }
+ if (shCount) {
+ switch (hByteZ) {
+ case 0:
+ while (shCount--) {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 3));
+ emitcode ("ror", "%s", aopGet (AOP (result), 2));
+ emitcode ("ror", "%s", aopGet (AOP (result), 1));
+ emitcode ("ror", "%s", aopGet (AOP (result), 0));
+ }
+ break;
+ case 1:
+ while (shCount--) {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 2));
+ emitcode ("ror", "%s", aopGet (AOP (result), 1));
+ emitcode ("ror", "%s", aopGet (AOP (result), 0));
+ }
+ break;
+ case 2:
+ while (shCount--) {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 1));
+ emitcode ("ror", "%s", aopGet (AOP (result), 0));
+ }
+ break;
+ case 3:
+ while (shCount--) {
+ emitcode ("lsr", "%s", aopGet (AOP (result), 0));
+ }
+ break;
+ }
+ }
+ }
+ release:
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
/* genRightShift - generate code for right shifting */
/*-----------------------------------------------------------------*/
-static void genRightShift (iCode *ic)
+static void
+genRightShift (iCode * ic)
+{
+ operand *right, *left, *result;
+ sym_link *letype;
+ int size, offset;
+ int sign = 0, first = 1;
+ symbol *tlbl;
+
+ aopOp (right = IC_RIGHT (ic), ic, FALSE);
+
+ if (AOP_TYPE (right) == AOP_LIT) {
+ genShiftRightLit (ic);
+ return;
+ }
+ /* unknown count */
+ if (AOP_SIZE (right) > 1) {
+ if (isRegPair (AOP (right))) {
+ emitcode ("movw", "r24,%s", aopGet (AOP (right), 0));
+ }
+ else {
+ emitcode ("mov", "r24,%s", aopGet (AOP (right), 0));
+ emitcode ("mov", "r25,%s", aopGet (AOP (right), 1));
+ }
+ }
+ else {
+ emitcode ("mov", "r24,%s", aopGet (AOP (right), 0));
+ }
+ aopOp (left = IC_LEFT (ic), ic, FALSE);
+ aopOp (result = IC_RESULT (ic), ic, FALSE);
+ size = AOP_SIZE (result);
+ tlbl = newiTempLabel (NULL);
+ emitcode ("", "L%05d:", tlbl->key);
+ offset = size - 1;
+ letype = getSpec (operandType (left));
+ sign = !SPEC_USIGN (letype);
+ if (!sameRegs (AOP (left), AOP (result))) {
+ while (size--) {
+ aopPut (AOP (result), aopGet (AOP (left), offset), offset);
+ offset++;
+ }
+ size = AOP_SIZE (result);
+ }
+ size = AOP_SIZE (result);
+ while (size--) {
+ if (first) {
+ if (sign)
+ emitcode ("asr", "%s", aopGet (AOP (result), offset));
+ else
+ emitcode ("lsr", "%s", aopGet (AOP (result), offset));
+ first = 0;
+ }
+ else
+ emitcode ("ror", "%s", aopGet (AOP (result), offset));
+ offset--;
+ }
+ if (AOP_SIZE (right) > 1)
+ emitcode ("sbiw", "r24,1");
+ else
+ emitcode ("dec", "r24");
+ emitcode ("brne", "L%05d", tlbl->key);
+
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* RRsh - shift right rn by known count */
+/*-----------------------------------------------------------------*/
+static void
+RRsh (int shCount,int reg)
+{
+ shCount &= 0x0007; // shCount : 0..7
+
+ switch (shCount) {
+ case 0:
+ break;
+ case 1:
+ emitcode ("lsr", "r%d",reg);
+ break;
+ case 2:
+ emitcode ("lsr", "r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ break;
+ case 3:
+ emitcode ("swap", "r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ break;
+ case 4:
+ emitcode ("swap", "r%d",reg);
+ break;
+ case 5:
+ emitcode ("swap", "r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ break;
+ case 6:
+ emitcode ("swap","r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ break;
+ case 7:
+ emitcode ("swap","r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ break;
+ }
+}
+
+/*-----------------------------------------------------------------*/
+/* RLsh - shift left rn by known count */
+/*-----------------------------------------------------------------*/
+static void
+RLsh (int shCount, int reg)
{
- 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++;
- }
- }
-
- 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);
-
-release:
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ shCount &= 0x0007; // shCount : 0..7
+
+ switch (shCount) {
+ case 0:
+ break;
+ case 1:
+ emitcode ("lsl", "r%d",reg);
+ break;
+ case 2:
+ emitcode ("lsl", "r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ break;
+ case 3:
+ emitcode ("swap","r%d",reg);
+ emitcode ("lsr", "r%d",reg);
+ break;
+ case 4:
+ emitcode ("swap", "r%d",reg);
+ break;
+ case 5:
+ emitcode ("swap","r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ break;
+ case 6:
+ emitcode ("swap","r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ break;
+ case 7:
+ emitcode ("swap","r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ emitcode ("lsl", "r%d",reg);
+ break;
+ }
}
/*-----------------------------------------------------------------*/
/* genUnpackBits - generates code for unpacking bits */
/*-----------------------------------------------------------------*/
-static void genUnpackBits (operand *result, char *rname, int ptype)
-{
- int shCnt ;
- int rlen = 0 ;
- link *etype;
- int offset = 0 ;
+static void
+genUnpackBits (operand * result, char *rname, int ptype)
+{
+ int shCnt;
+ int rlen = 0;
+ sym_link *etype;
+ int offset = 0;
+ int rsize;
- etype = getSpec(operandType(result));
+ etype = getSpec (operandType (result));
+ rsize = getSize (operandType (result));
+ /* read the first byte */
+ switch (ptype) {
- /* read the first byte */
- switch (ptype) {
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ emitcode ("ld", "r24,%s+", rname);
+ break;
- case POINTER:
- case IPOINTER:
- emitcode("mov","a,@%s",rname);
- break;
-
- case PPOINTER:
- emitcode("movx","a,@%s",rname);
- break;
-
- case FPOINTER:
- emitcode("movx","a,@dptr");
- break;
+ case CPOINTER:
+ emitcode ("lpm", "r24,%s+", rname);
+ break;
- case CPOINTER:
- emitcode("clr","a");
- emitcode("movc","a","@a+dptr");
- break;
+ case GPOINTER:
+ emitcode ("call","__gptrget_pi");
+ emitcode ("mov","r24,r0");
+ break;
+ }
- case GPOINTER:
- emitcode("lcall","__gptrget");
- break;
- }
+ rlen = SPEC_BLEN (etype);
- /* 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)) {
+ /* 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)) {
- /* shift right acc */
- AccRsh(shCnt);
+ /* shift right acc */
+ RRsh (shCnt,24);
- emitcode("anl","a,#0x%02x",
- ((unsigned char) -1)>>(8 - SPEC_BLEN(etype)));
- aopPut(AOP(result),"a",offset);
- return ;
- }
+ emitcode ("andi", "r24,lo(0x%x)",
+ ((unsigned char) -1) >> (8 - SPEC_BLEN (etype)));
+ aopPut (AOP (result), "r24", offset++);
+ goto finish;
+ }
- /* bit field did not fit in a byte */
- rlen = SPEC_BLEN(etype) - 8;
- aopPut(AOP(result),"a",offset++);
+ /* bit field did not fit in a byte */
+ aopPut (AOP (result), "r24", offset++);
- while (1) {
+ while (1) {
+
+ switch (ptype) {
+
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ emitcode ("ld", "r24,%s+");
+ break;
+
+ case CPOINTER:
+ emitcode ("lpm", "r24,%s+");
+ break;
+
+ case GPOINTER:
+ emitcode ("call", "__gptrget_pi");
+ break;
+ }
+
+ rlen -= 8;
+ /* if we are done */
+ if (rlen < 8)
+ break;
+
+ aopPut (AOP (result), "r24", offset++);
+
+ }
+
+ if (rlen) {
+ aopPut (AOP (result), "r24", offset++);
+ }
+
+ finish:
+ if (offset < rsize) {
+ rsize -= offset;
+ while (rsize--)
+ aopPut (AOP (result), zero, offset++);
+ }
+ 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);
+ size = AOP_SIZE (result);
+ while (size--) {
+ if (offset)
+ sprintf (buffer, "(%s + %d)", l, offset);
+ else
+ sprintf (buffer, "%s", l);
+ emitcode ("lds", "%s,%s", aopGet (AOP (result), offset++),
+ buffer);
+ }
+
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genNearPointerGet - emitcode for near pointer fetch */
+/*-----------------------------------------------------------------*/
+static void
+genMemPointerGet (operand * left, operand * result, iCode * ic, iCode *pi)
+{
+ asmop *aop = NULL;
+ regs *preg = NULL;
+ int gotFreePtr = 0;
+ char *rname, *frname = NULL;
+ sym_link *rtype, *retype;
+ sym_link *ltype = operandType (left);
+
+ 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, 0);
+ if (isRegPair (AOP (left) )) {
+ emitcode ("movw", "%s,%s",
+ aop->aopu.aop_ptr->name,
+ aopGet(AOP(left),0));
+ } else {
+ emitcode ("mov", "%s,%s", aop->aopu.aop_ptr->name,
+ aopGet (AOP (left), 0));
+ emitcode ("mov", "%s,%s", aop->aop_ptr2->name,
+ aopGet (AOP (left), 1));
+ }
+ gotFreePtr = 1;
+ }
+ else {
+ aop = AOP(left);
+ frname = aopGet(aop,0);
+ }
+ if (AOP_ISX(aop)) {
+ rname = "X";
+ } else if (AOP_ISZ(aop)) {
+ rname = "Z";
+ } else {
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "pointer not in correct register");
+ exit (0);
+ }
+
+ 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 (size || pi) {
+ emitcode ("ld","%s,%s+",aopGet(AOP(result),offset), rname);
+ } else {
+ emitcode ("ld","%s,%s",aopGet(AOP(result),offset), rname);
+ }
+ }
+ }
+
+ /* now some housekeeping stuff */
+ if (gotFreePtr) {
+ /* we had to allocate for this iCode */
+ if (pi) {
+ if (isRegPair (AOP (left) )) {
+ emitcode ("movw", "%s,%s",
+ aopGet (AOP(left),0),
+ aop->aopu.aop_ptr->name);
+ } else {
+ emitcode ("mov", "%s,%s",
+ aopGet (AOP (left), 0),
+ aop->aopu.aop_ptr->name);
+ emitcode ("mov", "%s,%s",
+ aopGet (AOP (left), 1),
+ aop->aop_ptr2->name);
+ }
+ }
+ 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;
+ emitcode ("sbiw", "%s,%d",frname,size);
+ }
+ }
+
+ /* done */
+ if (pi) pi->generated = 1;
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+
+}
+
+/*-----------------------------------------------------------------*/
+/* genCodePointerGet - gget value from code space */
+/*-----------------------------------------------------------------*/
+static void
+genCodePointerGet (operand * left, operand * result, iCode * ic, iCode *pi)
+{
+ int size, offset;
+ sym_link *retype = getSpec (operandType (result));
+ asmop *aop = NULL;
+ int gotFreePtr = 0;
+
+ aopOp (left, ic, FALSE);
+
+ /* if the operand is already in Z register
+ then we do nothing else we move the value to Z register */
+ if (AOP_ISZ(AOP(left))) {
+ aop = AOP (left);
+ } else {
+ aop = newAsmop(0);
+ getFreePtr(ic,&aop,FALSE,TRUE);
+ if (isRegPair(AOP (left))) {
+ emitcode ("movw","r30,%s",aopGet (AOP (left), 0));
+ } else {
+ emitcode ("mov", "r30,%s", aopGet (AOP (left), 0));
+ emitcode ("mov", "r31,%s", aopGet (AOP (left), 1));
+ }
+ gotFreePtr = 1;
+ }
+
+ aopOp (result, ic, FALSE);
+
+ /* if bit then unpack */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, "Z", CPOINTER);
+ else {
+ size = AOP_SIZE (result);
+ offset = 0;
+
+ while (size--) {
+ if (size || pi) {
+ emitcode ("lpm","%s,Z+",aopGet(AOP(result),offset++));
+ } else {
+ emitcode ("lpm","%s,Z",aopGet(AOP(result),offset++));
+ }
+ }
+ }
+
+ /* now some housekeeping stuff */
+ if (gotFreePtr) {
+ /* we had to allocate for this iCode */
+ if (pi) {
+ if (isRegPair(AOP (left))) {
+ emitcode ("movw","%s,r30",aopGet (AOP (left), 0));
+ } else {
+ emitcode ("mov", "%s,r30", aopGet (AOP (left), 0));
+ emitcode ("mov", "%s,r31", aopGet (AOP (left), 1));
+ }
+ }
+ 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;
+ emitcode ("sbiw", "r30,%d",size);
+ }
+ }
+
+ /* done */
+ if (pi) 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, iCode *pi)
+{
+ int size, offset;
+ int gotFreePtr = 0;
+ sym_link *retype = getSpec (operandType (result));
+ asmop *aop = NULL;
+
+ aopOp (left, ic, FALSE);
+
+ /* if the operand is already in dptr
+ then we do nothing else we move the value to dptr */
+ if (AOP_ISZ(AOP(left))) {
+ aop = AOP(left);
+ } else {
+ aop = newAsmop(0);
+ getFreePtr(ic,&aop,FALSE,TRUE);
+ if (isRegPair(AOP(left))) {
+ emitcode ("movw", "r30,%s", aopGet (AOP (left), 0));
+ } else {
+ emitcode ("mov", "r30,%s", aopGet (AOP (left), 0));
+ emitcode ("mov", "r31,%s", aopGet (AOP (left), 1));
+ }
+ emitcode ("mov", "r24,%s", aopGet (AOP (left), 2));
+ gotFreePtr=1;
+ }
+
+ /* so Z register now contains the address */
+
+ aopOp (result, ic, FALSE);
+
+ /* if bit then unpack */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, "Z", GPOINTER);
+ else {
+ size = AOP_SIZE (result);
+ offset = 0;
+
+ while (size--) {
+ if (size || pi)
+ emitcode ("call", "__gptrget_pi");
+ else
+ emitcode ("call", "__gptrget");
+ aopPut (AOP (result), "r0", offset++);
+ }
+ }
+
+
+ /* now some housekeeping stuff */
+ if (gotFreePtr) {
+ /* we had to allocate for this iCode */
+ if (pi) {
+ if (isRegPair(AOP (left))) {
+ emitcode ("movw","%s,r30",aopGet (AOP (left), 0));
+ } else {
+ emitcode ("mov", "%s,r30", aopGet (AOP (left), 0));
+ emitcode ("mov", "%s,r31", aopGet (AOP (left), 1));
+ }
+ }
+ 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;
+ emitcode ("sbiw", "r30,%d",size);
+ }
+ }
+ if (pi) pi->generated=1;
+ freeAsmop (left, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genPointerGet - generate code for pointer get */
+/*-----------------------------------------------------------------*/
+static void
+genPointerGet (iCode * ic, iCode *pi)
+{
+ operand *left, *result;
+ sym_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));
+
+
+ }
+
+ /* now that we have the pointer type we assign
+ the pointer values */
+ switch (p_type) {
+
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ genMemPointerGet (left, result, ic, pi);
+ break;
+
+ case CPOINTER:
+ genCodePointerGet (left, result, ic, pi);
+ break;
+
+ case GPOINTER:
+ genGenPointerGet (left, result, ic, pi);
+ break;
+ }
+
+}
+
+/*-----------------------------------------------------------------*/
+/* genPackBits - generates code for packed bit storage */
+/*-----------------------------------------------------------------*/
+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++);
+ MOVR24 (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 */
+ RLsh (shCount,24);
+
+ if (SPEC_BLEN (etype) < 8) { /* if smaller than a byte */
+
+ switch (p_type) {
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ emitcode ("ld", "r1,%s",rname);
+ break;
+
+ case GPOINTER:
+ emitcode ("push", "r1");
+ emitcode ("push", "r24");
+ emitcode ("call", "__gptrget");
+ emitcode ("pop", "r1");
+ emitcode ("mov","r24,r0");
+ break;
+ }
+
+ emitcode ("andi", "r24,#0x%02x", (unsigned char)
+ ((unsigned char) (0xFF << (blen + bstr)) |
+ (unsigned char) (0xFF >> (8 - bstr))));
+ emitcode ("or", "r24,r1");
+ if (p_type == GPOINTER)
+ emitcode ("pop", "r1");
+ }
+ }
+
+ switch (p_type) {
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ emitcode("st","%s+,r24");
+ break;
+
+ case GPOINTER:
+ emitcode("mov","r0,r24");
+ emitcode ("call", "__gptrput_pi");
+ break;
+ }
+
+ /* if we r done */
+ if (SPEC_BLEN (etype) <= 8)
+ return;
+
+ rLen = SPEC_BLEN (etype);
+
+ /* now generate for lengths greater than one byte */
+ while (1) {
+
+ l = aopGet (AOP (right), offset++);
+
+ rLen -= 8;
+ if (rLen < 8)
+ break;
+
+ switch (p_type) {
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ emitcode ("st", "%s+,%s",rname,l);
+ break;
+
+ case GPOINTER:
+ MOVR0 (l);
+ emitcode ("lcall", "__gptrput_pi");
+ break;
+ }
+ }
+
+ MOVR24 (l);
+
+ /* last last was not complete */
+ if (rLen) {
+ /* save the byte & read byte */
+ switch (p_type) {
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ emitcode ("st","%s+,r24",rname);
+ break;
+ case GPOINTER:
+ emitcode ("push", "r1");
+ emitcode ("push", "r24");
+ emitcode ("lcall", "__gptrget");
+ emitcode ("mov","r24,r0");
+ emitcode ("pop", "r1");
+ break;
+ }
+
+ emitcode ("andi", "r24,0x%02x", (((unsigned char) -1 << rLen) & 0xff));
+ emitcode ("or", "r24,r1");
+ }
+
+ if (p_type == GPOINTER)
+ emitcode ("pop", "r1");
+
+ switch (p_type) {
- 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;
-
+ emitcode ("st", "%s,r24", rname);
+ 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++);
-
- }
-
- if (rlen) {
- emitcode("anl","a,#0x%02x",((unsigned char)-1)>>(-rlen));
- aopPut(AOP(result),"a",offset);
- }
-
- return ;
+ emitcode ("mov","r0,r24");
+ emitcode ("call", "__gptrput");
+ break;
+ }
}
-
/*-----------------------------------------------------------------*/
-/* genDataPointerGet - generates code when ptr offset is known */
+/* genDataPointerSet - remat pointer to data space */
/*-----------------------------------------------------------------*/
-static void genDataPointerGet (operand *left,
- operand *result,
- iCode *ic)
+static void
+genDataPointerSet (operand * right, 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++);
- }
+ int size, offset = 0;
+ char *l, buffer[256];
- freeAsmop(left,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
-}
+ aopOp (right, ic, FALSE);
-/*-----------------------------------------------------------------*/
-/* 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];
-
- 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 ;
-
+ l = aopGet (AOP (result), 0);
+ size = AOP_SIZE (right);
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);
- }
- offset++ ;
- if (size)
- 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);
- }
- }
-
- /* done */
- freeAsmop(result,NULL,ic,TRUE);
-
+ if (offset)
+ sprintf (buffer, "(%s + %d)", l, offset);
+ else
+ sprintf (buffer, "%s", l);
+ emitcode ("sts", "%s,%s", buffer,
+ aopGet (AOP (right), offset++));
+ }
+
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genPagedPointerGet - emitcode for paged pointer fetch */
+/* genNearPointerSet - emitcode for near pointer put */
/*-----------------------------------------------------------------*/
-static void genPagedPointerGet (operand *left,
- operand *result,
- iCode *ic)
+static void
+genMemPointerSet (operand * right, operand * result, iCode * ic, iCode *pi)
{
- asmop *aop = NULL;
- regs *preg = NULL ;
- char *rname ;
- link *rtype, *retype;
-
- 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",
- 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 ;
+ asmop *aop = NULL;
+ char *frname = NULL, *rname, *l;
+ int gotFreePtr = 0;
+ sym_link *retype;
+ sym_link *ptype = operandType (result);
- while (size--) {
-
- emitcode("movx","a,@%s",rname);
- aopPut(AOP(result),"a",offset);
-
- offset++ ;
-
- if (size)
- 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);
- }
- }
-
- /* done */
- freeAsmop(result,NULL,ic,TRUE);
-
+ retype = getSpec (operandType (right));
-}
-
-/*-----------------------------------------------------------------*/
-/* genFarPointerGet - gget value from far space */
-/*-----------------------------------------------------------------*/
-static void genFarPointerGet (operand *left,
- operand *result, iCode *ic)
-{
- int size, offset ;
- link *retype = getSpec(operandType(result));
-
- aopOp(left,ic,FALSE);
-
- /* 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");
- }
- }
-
- freeAsmop(result,NULL,ic,TRUE);
-}
-
-/*-----------------------------------------------------------------*/
-/* emitcodePointerGet - gget value from code space */
-/*-----------------------------------------------------------------*/
-static void emitcodePointerGet (operand *left,
- operand *result, iCode *ic)
-{
- int size, offset ;
- link *retype = getSpec(operandType(result));
-
- aopOp(left,ic,FALSE);
-
- /* 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");
- }
- }
-
- freeAsmop(result,NULL,ic,TRUE);
-}
-
-/*-----------------------------------------------------------------*/
-/* genGenPointerGet - gget value from generic pointer space */
-/*-----------------------------------------------------------------*/
-static void genGenPointerGet (operand *left,
- operand *result, iCode *ic)
-{
- int size, offset ;
- link *retype = getSpec(operandType(result));
-
- aopOp(left,ic,FALSE);
-
- /* 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));
- }
- 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);
-}
+ 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;
+ }
+ if (!AOP_INPREG(AOP(result))) {
+ /* otherwise get a free pointer register */
+ aop = newAsmop (0);
+ getFreePtr (ic, &aop, FALSE, 0);
+ if (isRegPair (AOP (result) )) {
+ emitcode ("movw", "%s,%s",aop->aopu.aop_ptr->name,
+ aopGet(AOP (result), 0));
+ } else {
+ emitcode ("mov", "%s,%s", aop->aopu.aop_ptr->name,
+ aopGet (AOP (result), 0));
+ emitcode ("mov", "%s,%s", aop->aop_ptr2->name,
+ aopGet (AOP (result), 1));
+ }
+ gotFreePtr = 1;
+ } else {
+ aop = AOP(result);
+ frname = aopGet(aop,0);
+ }
+
+ aopOp (right, ic, FALSE);
+ if (AOP_ISX(aop)) {
+ rname = "X";
+ } else if (AOP_ISZ(aop)) {
+ rname = "Z";
+ } else {
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "pointer not in correct register");
+ exit (0);
+ }
+ /* 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);
+ if (size || pi)
+ emitcode ("st", "%s+,%s", rname,l);
+ else
+ emitcode ("st", "%s,%s", rname,l);
+ offset++;
+ }
+ }
+
+ /* now some housekeeping stuff */
+ if (gotFreePtr) {
+ /* we had to allocate for this iCode */
+ if (pi) {
+ if (isRegPair (AOP (result) )) {
+ emitcode ("movw", "%s,%s",
+ aopGet(AOP(result),0),
+ aop->aopu.aop_ptr->name);
+ } else {
+ emitcode ("mov", "%s,%s", aop->aopu.aop_ptr->name,
+ aopGet (AOP (result), 0));
+ emitcode ("mov", "%s,%s", aop->aop_ptr2->name,
+ aopGet (AOP (result), 1));
+ }
+ }
+ freeAsmop (NULL, aop, ic, TRUE);
+ } else {
-/*-----------------------------------------------------------------*/
-/* 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:
- case IPOINTER:
- genNearPointerGet (left,result,ic);
- break;
-
- case PPOINTER:
- genPagedPointerGet(left,result,ic);
- break;
-
- case FPOINTER:
- genFarPointerGet (left,result,ic);
- break;
-
- case CPOINTER:
- emitcodePointerGet (left,result,ic);
- break;
-
- case GPOINTER:
- genGenPointerGet (left,result,ic);
- break;
- }
+ /* 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 (right)->liveTo > ic->seq || ic->depth)) && !pi) {
+ int size = AOP_SIZE (right) - 1;
+ emitcode ("sbiw", "%s,%d",frname,size);
+ }
+ }
+ /* done */
+ if (pi) pi->generated = 1;
+ freeAsmop (result, NULL, ic, TRUE);
+ freeAsmop (right, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genPackBits - generates code for packed bit storage */
+/* genGenPointerSet - set value from generic pointer space */
/*-----------------------------------------------------------------*/
-static void genPackBits (link *etype ,
- operand *right ,
- char *rname, int p_type)
+static void
+genGenPointerSet (operand * right, operand * result, iCode * ic, iCode *pi)
{
- 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 */
-
-
- 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;
- }
-
- 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");
- }
- }
-
- 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;
- }
-
- emitcode ("anl","a,#0x%02x",((unsigned char)-1 << -rLen) );
- emitcode ("orl","a,b");
- }
-
- if (p_type == GPOINTER)
- emitcode("pop","b");
-
- switch (p_type) {
-
- case POINTER:
- emitcode("mov","@%s,a",rname);
- break;
+ int size, offset;
+ int gotFreePtr = 0;
+ sym_link *retype = getSpec (operandType (right));
+ asmop *aop = NULL;
- case FPOINTER:
- emitcode("movx","@dptr,a");
- break;
+ aopOp (result, ic, FALSE);
- case GPOINTER:
- emitcode("lcall","__gptrput");
- break;
- }
-}
-/*-----------------------------------------------------------------*/
-/* genDataPointerSet - remat pointer to data space */
-/*-----------------------------------------------------------------*/
-static void genDataPointerSet(operand *right,
- operand *result,
- iCode *ic)
-{
- 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));
- }
+ /* if the operand is already in dptr
+ then we do nothing else we move the value to dptr */
+ if (AOP_ISZ(AOP(result))) {
+ aop = AOP(right);
+ } else {
+ aop = newAsmop(0);
+ getFreePtr(ic,&aop,FALSE,TRUE);
+ if (isRegPair(AOP(result))) {
+ emitcode ("movw", "r30,%s", aopGet (AOP (result), 0));
+ } else {
+ emitcode ("mov", "r30,%s", aopGet (AOP (result), 0));
+ emitcode ("mov", "r31,%s", aopGet (AOP (result), 1));
+ }
+ emitcode ("mov", "r24,%s", aopGet (AOP (result), 2));
+ gotFreePtr=1;
+ }
+
+ /* so Z register now contains the address */
+ aopOp (right, ic, FALSE);
+
+ /* if bit then unpack */
+ if (IS_BITVAR (retype))
+ genUnpackBits (result, "Z", GPOINTER);
+ else {
+ size = AOP_SIZE (right);
+ offset = 0;
+
+ while (size--) {
+ char *l = aopGet(AOP (right), offset++);
+ MOVR0(l);
+
+ if (size || pi)
+ emitcode ("call", "__gptrput_pi");
+ else
+ emitcode ("call", "__gptrput");
+ }
+ }
+
+ /* now some housekeeping stuff */
+ if (gotFreePtr) {
+ /* we had to allocate for this iCode */
+ if (pi) {
+ if (isRegPair(AOP(result))) {
+ emitcode ("movw", "%s,r30", aopGet (AOP (result), 0));
+ } else {
+ emitcode ("mov", "%s,r30", aopGet (AOP (result), 0));
+ emitcode ("mov", "%s,r31", aopGet (AOP (result), 1));
+ }
+ }
+ freeAsmop (NULL, aop, ic, TRUE);
+ } else {
- freeAsmop(right,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ /* 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;
+ emitcode ("sbiw", "r30,%d",size);
+ }
+ }
+ if (pi) pi->generated = 1;
+ freeAsmop (right, NULL, ic, TRUE);
+ freeAsmop (result, NULL, ic, TRUE);
}
/*-----------------------------------------------------------------*/
-/* genNearPointerSet - emitcode for near pointer put */
+/* genPointerSet - stores the value into a pointer location */
/*-----------------------------------------------------------------*/
-static void genNearPointerSet (operand *right,
- operand *result,
- iCode *ic)
+static void
+genPointerSet (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;
- }
-
- /* 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++;
- }
- }
-
- /* 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);
+ operand *right, *result;
+ sym_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));
-/*-----------------------------------------------------------------*/
-/* genPagedPointerSet - emitcode for Paged pointer put */
-/*-----------------------------------------------------------------*/
-static void genPagedPointerSet (operand *right,
- operand *result,
- iCode *ic)
-{
- 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",
- 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);
-
- if (size)
- 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);
-
-
-}
+ }
-/*-----------------------------------------------------------------*/
-/* genFarPointerSet - set value from far space */
-/*-----------------------------------------------------------------*/
-static void genFarPointerSet (operand *right,
- operand *result, iCode *ic)
-{
- int size, offset ;
- link *retype = getSpec(operandType(right));
-
- aopOp(result,ic,FALSE);
-
- /* 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");
- }
- }
-
- freeAsmop(right,NULL,ic,TRUE);
-}
+ /* now that we have the pointer type we assign
+ the pointer values */
+ switch (p_type) {
-/*-----------------------------------------------------------------*/
-/* genGenPointerSet - set value from generic pointer space */
-/*-----------------------------------------------------------------*/
-static void genGenPointerSet (operand *right,
- operand *result, iCode *ic)
-{
- int size, offset ;
- link *retype = getSpec(operandType(right));
-
- aopOp(result,ic,FALSE);
-
- /* 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");
- }
- }
-
- freeAsmop(right,NULL,ic,TRUE);
-}
+ case POINTER:
+ case IPOINTER:
+ case PPOINTER:
+ case FPOINTER:
+ genMemPointerSet (right, result, ic, pi);
+ break;
-/*-----------------------------------------------------------------*/
-/* 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) {
-
- case POINTER:
- case IPOINTER:
- genNearPointerSet (right,result,ic);
- break;
-
- case PPOINTER:
- genPagedPointerSet (right,result,ic);
- break;
-
- case FPOINTER:
- genFarPointerSet (right,result,ic);
- break;
-
- case GPOINTER:
- genGenPointerSet (right,result,ic);
- break;
- }
+ case GPOINTER:
+ genGenPointerSet (right, result, ic, pi);
+ break;
+
+ default:
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "genPointerSet: illegal pointer type");
+ }
}
/*-----------------------------------------------------------------*/
/* genIfx - generate code for Ifx statement */
/*-----------------------------------------------------------------*/
-static void genIfx (iCode *ic, iCode *popIc)
+static void
+genIfx (iCode * ic, iCode * popIc)
{
- operand *cond = IC_COND(ic);
- int isbit =0;
-
- 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");
+ operand *cond = IC_COND (ic);
+ char *cname ;
+ symbol *lbl;
+ int tob = 0;
- ic->generated = 1;
+ aopOp (cond, ic, FALSE);
+
+ /* get the value into acc */
+ if (AOP_SIZE(cond) == 1 && AOP_ISHIGHREG(AOP(cond),0)) {
+ cname = aopGet(AOP(cond),0);
+ } else {
+ toBoolean (cond, "r24", 0);
+ tob = 1;
+ cname = "r24";
+ }
+ /* 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);
+ emitcode("cpi","%s,0",cname);
+ } else if (!tob) emitcode("cpi","%s,0",cname);
+
+ lbl = newiTempLabel(NULL);
+ if (IC_TRUE(ic)) {
+ emitcode ("breq","L%05d",lbl->key);
+ emitcode ("jmp","L%05d",IC_TRUE(ic)->key);
+ emitcode ("","L%05d:",lbl->key);
+ } else {
+ emitcode ("brne","L%05d",lbl->key);
+ emitcode ("jmp","L%05d",IC_FALSE(ic)->key);
+ emitcode ("","L%05d:",lbl->key);
+ }
+ ic->generated = 1;
}
/*-----------------------------------------------------------------*/
/* genAddrOf - generates code for address of */
/*-----------------------------------------------------------------*/
-static void genAddrOf (iCode *ic)
+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;
-
-
- if (options.stack10bit && size < (FPTRSIZE - 1))
- {
- fprintf(stderr,
- "*** warning: pointer to stack var truncated.\n");
- }
-
- offset = 1;
- while (size--)
- {
- /* Yuck! */
- if (options.stack10bit && offset == 2)
- {
- aopPut(AOP(IC_RESULT(ic)),"#0x40", offset++);
- }
- else
- {
- 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++);
- }
-
-release:
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
+ symbol *sym = OP_SYMBOL (IC_LEFT (ic));
+ int size, offset;
+
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ assert(AOP_SIZE(IC_RESULT(ic)) >= 2);
+ /* 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) {
+ if (allHigh(AOP(IC_RESULT(ic)))) {
+ if (isRegPair (AOP(IC_RESULT(ic)))) {
+ emitcode ("movw","%s,r28",aopGet(AOP(IC_RESULT(ic)),0));
+ } else {
+ emitcode ("mov","%s,r28",aopGet(AOP(IC_RESULT(ic)),0));
+ emitcode ("mov","%s,r29",aopGet(AOP(IC_RESULT(ic)),1));
+ }
+ if (sym->stack < 0) {
+ emitcode("subi","%s,<(%d)",aopGet(AOP(IC_RESULT(ic)),0),-sym->stack);
+ emitcode("sbci","%s,>(%d)",aopGet(AOP(IC_RESULT(ic)),1),-sym->stack);
+ } else {
+ emitcode("subi","%s,<(-%d)",aopGet(AOP(IC_RESULT(ic)),0),sym->stack);
+ emitcode("sbci","%s,>(-%d)",aopGet(AOP(IC_RESULT(ic)),1),sym->stack);
+ }
+ } else {
+ emitcode("movw","r24,r28");
+ if (sym->stack > -63 && sym->stack < 63) {
+ if (sym->stack < 0)
+ emitcode("sbiw","r24,%d",-sym->stack);
+ else
+ emitcode("sbiw","r24,%d",sym->stack);
+ } else {
+ if (sym->stack < 0) {
+ emitcode("subi","r24,<(%d)",-sym->stack);
+ emitcode("sbci","r25,>(%d)",-sym->stack);
+ } else {
+ emitcode("subi","r24,<(-%d)",sym->stack);
+ emitcode("sbci","r25,>(-%d)",sym->stack);
+ }
+ }
+
+ aopPut(AOP(IC_RESULT(ic)),"r24",0);
+ aopPut(AOP(IC_RESULT(ic)),"r25",1);
+ }
+ }
+ else {
+ aopPut(AOP(IC_RESULT(ic)),"r28",0);
+ aopPut(AOP(IC_RESULT(ic)),"r29",1);
+ }
+ /* fill the result with zero */
+ size = AOP_SIZE (IC_RESULT (ic)) - 2;
+ offset = 2;
+ 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;
+ assert(size<=2);
+ while (size--) {
+ char s[SDCC_NAME_MAX];
+ if (offset)
+ sprintf (s, ">(%s)", sym->rname);
+ else
+ sprintf (s, "<(%s)", sym->rname);
+ aopPut (AOP (IC_RESULT (ic)), s, offset++);
+ }
+
+ release:
+ 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");
- }
-
- 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(result,NULL,ic,FALSE);
-
+ 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++);
+ 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 (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 ;
+ operand *result, *right;
+ int size, offset;
unsigned long lit = 0L;
- result = IC_RESULT(ic);
- right = IC_RIGHT(ic) ;
+ result = IC_RESULT (ic);
+ right = IC_RIGHT (ic);
- /* if they are the same */
- if (operandsEqu (IC_RESULT(ic),IC_RIGHT(ic)))
- return ;
+ /* if they are the same */
+ if (operandsEqu (IC_RESULT (ic), IC_RIGHT (ic)))
+ return;
- aopOp(right,ic,FALSE);
-
- /* special case both in far space */
- if ((AOP_TYPE(right) == AOP_DPTR ||
- AOP_TYPE(right) == AOP_DPTR2) &&
- IS_TRUE_SYMOP(result) &&
- isOperandInFarSpace(result)) {
-
- genFarFarAssign (result,right,ic);
- return ;
- }
-
- aopOp(result,ic,TRUE);
-
- /* if they are the same registers */
- if (sameRegs(AOP(right),AOP(result)))
- goto release;
-
- /* 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;
- }
-
- /* 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 ;
- }
-
- /* 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);
- }
- } else {
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
+ aopOp (right, ic, FALSE);
+
+ /* 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);
+
+ /* if they are the same registers */
+ if (sameRegs (AOP (right), AOP (result)))
+ goto release;
+
+ /* 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;
+ }
+
+ /* 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;
+ }
+
+ /* we need to or */
+ toBoolean (right, "", 0);
+ 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), size);
+ }
+ }
+ else {
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset), offset);
+ offset++;
+ }
}
- }
-
-release:
- freeAsmop (right,NULL,ic,FALSE);
- freeAsmop (result,NULL,ic,TRUE);
-}
+
+ release:
+ freeAsmop (right, NULL, ic, FALSE);
+ 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;
-
- 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);
+ symbol *jtab;
+ char *l;
+
+ aopOp (IC_JTCOND (ic), ic, FALSE);
+ /* get the condition into accumulator */
+ l = aopGet (AOP (IC_JTCOND (ic)), 0);
+ MOVA (l);
+ /* multiply by three */
+ emitcode ("add", "a,acc");
+ emitcode ("add", "a,%s", aopGet (AOP (IC_JTCOND (ic)), 0));
+ 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));
- 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 ;
-
- aopOp(right,ic,FALSE) ;
- aopOp(result,ic,FALSE);
-
- /* 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;
- }
-
- /* 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 ;
- }
-
- /* we need to or */
- toBoolean(right);
- aopPut(AOP(result),"a",0);
- 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 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 the result is of type pointer */
- if (IS_PTR(ctype)) {
+ 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;
+
+ aopOp (right, ic, FALSE);
+ aopOp (result, ic, FALSE);
+
+ /* 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;
+ }
- int p_type;
- link *type = operandType(right);
- 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 {
- /* we have to go by the storage class */
- p_type = PTR_TYPE(SPEC_OCLS(etype));
- }
-
- /* the first two bytes are known */
- size = GPTRSIZE - 1;
- offset = 0 ;
- while (size--) {
- aopPut(AOP(result),
- aopGet(AOP(right),offset,FALSE,FALSE),
- offset);
- offset++;
- }
- /* 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);
- }
- aopPut(AOP(result),l, GPTRSIZE - 1);
- 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;
+ }
+
+ /* we need to or */
+ toBoolean (right, "", 0);
+ aopPut (AOP (result), "a", 0);
+ goto release;
}
-
- /* just copy the pointers */
- size = AOP_SIZE(result);
- offset = 0 ;
+
+ /* 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 in different places then copy */
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset), offset);
+ offset++;
+ }
+ goto release;
+ }
+
+
+ /* if the result is of type pointer */
+ if (IS_PTR (ctype)) {
+
+ int p_type;
+ sym_link *type = operandType (right);
+ sym_link *etype = getSpec (type);
+
+ /* pointer to generic pointer */
+ if (IS_GENPTR (ctype)) {
+ if (IS_PTR (type))
+ p_type = DCL_TYPE (type);
+ else {
+ /* we have to go by the storage class */
+ p_type = PTR_TYPE (SPEC_OCLS (etype));
+ }
+
+ /* the first two bytes are known */
+ size = GPTRSIZE - 1;
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset), 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%x", gpVal);
+ aopPut (AOP (result), gpValStr, GPTRSIZE - 1);
+ }
+ goto release;
+ }
+
+ /* just copy the pointers */
+ size = AOP_SIZE (result);
+ offset = 0;
+ while (size--) {
+ aopPut (AOP (result),
+ aopGet (AOP (right), offset), offset);
+ 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++;
- }
- 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 source && destination */
- size = AOP_SIZE(result) - AOP_SIZE(right);
- /* if unsigned or not an integral type */
- if (SPEC_USIGN(rtype) || !IS_SPEC(rtype)) {
- 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++);
- }
-
- /* we are done hurray !!!! */
-
-release:
- freeAsmop(right,NULL,ic,TRUE);
- freeAsmop(result,NULL,ic,TRUE);
+ aopPut (AOP (result), aopGet (AOP (right), offset), offset);
+ 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 (SPEC_USIGN (rtype) || !IS_SPEC (rtype)) {
+ while (size--)
+ aopPut (AOP (result), zero, offset++);
+ }
+ else {
+ /* we need to extend the sign :{ */
+ // PENDING: Does nothing on avr
+#if 0
+ char *l = aopGet (AOP (right), AOP_SIZE (right) - 1);
+ MOVA (l);
+#endif
+ emitcode ("rlc", "a");
+ emitcode ("subb", "a,acc");
+ while (size--)
+ aopPut (AOP (result), "a", offset++);
+ }
+
+ /* we are done hurray !!!! */
+
+ release:
+ 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;
-
- /* 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;
-
- if (operandLitValue(IC_RIGHT(ic)) != 1)
- return 0;
+ 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;
+
+ /* 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;
+
+ if (operandLitValue (IC_RIGHT (ic)) != 1)
+ return 0;
+
+ /* 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 (IS_AOP_PREG (IC_RESULT (ic))) {
+ emitcode ("dec", "%s", aopGet (AOP (IC_RESULT (ic)), 0));
+ emitcode ("mov", "a,%s", aopGet (AOP (IC_RESULT (ic)), 0));
+ emitcode ("jnz", "%05d$", lbl->key + 100);
+ }
+ else {
+ emitcode ("djnz", "%s,%05d$",
+ aopGet (AOP (IC_RESULT (ic)), 0), lbl->key + 100);
+ }
+ emitcode ("sjmp", "%05d$", lbl1->key + 100);
+ emitcode ("", "%05d$:", lbl->key + 100);
+ emitcode ("ljmp", "%05d$", IC_TRUE (ifx)->key + 100);
+ emitcode ("", "%05d$:", lbl1->key + 100);
+
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+ ifx->generated = 1;
+ return 1;
+}
- /* if the size of this greater than one then no
- saving */
- if (getSize(operandType(IC_RESULT(ic))) > 1)
- return 0;
+static char *recvregs[8] = {
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23"
+};
- /* otherwise we can save BIG */
- lbl = newiTempLabel(NULL);
- lbl1= newiTempLabel(NULL);
-
- aopOp(IC_RESULT(ic),ic,FALSE);
-
- if (IS_AOP_PREG(IC_RESULT(ic))) {
- emitcode("dec","%s",
- aopGet(AOP(IC_RESULT(ic)),0,FALSE,FALSE));
- emitcode("mov","a,%s",aopGet(AOP(IC_RESULT(ic)),0,FALSE,FALSE));
- emitcode("jnz","%05d$",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;
-}
+static int recvCnt = 0;
/*-----------------------------------------------------------------*/
/* 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"));
- offset++;
- }
- aopOp(IC_RESULT(ic),ic,FALSE);
- size = AOP_SIZE(IC_RESULT(ic));
- offset = 0;
+static void
+genReceive (iCode * ic)
+{
+ int size, offset = 0;
+ aopOp (IC_RESULT (ic), ic, FALSE);
+ size = AOP_SIZE (IC_RESULT (ic));
while (size--) {
- emitcode ("pop","acc");
- aopPut (AOP(IC_RESULT(ic)),"a",offset++);
+ aopPut (AOP (IC_RESULT (ic)), recvregs[recvCnt++], offset);
+ offset++;
}
-
- } else {
- _G.accInUse++;
- aopOp(IC_RESULT(ic),ic,FALSE);
- _G.accInUse--;
- assignResultValue(IC_RESULT(ic));
- }
-
- freeAsmop(IC_RESULT(ic),NULL,ic,TRUE);
+ freeAsmop (IC_RESULT (ic), NULL, ic, TRUE);
+}
+
+/*-----------------------------------------------------------------*/
+/* genDummyRead - generate code for dummy read of volatiles */
+/*-----------------------------------------------------------------*/
+static void
+genDummyRead (iCode * ic)
+{
+ emitcode ("; genDummyRead","");
+ emitcode ("; not implemented","");
+
+ ic = ic;
}
/*-----------------------------------------------------------------*/
/* gen51Code - generate code for 8051 based controllers */
/*-----------------------------------------------------------------*/
-void gen51Code (iCode *lic)
+void
+genAVRCode (iCode * lic)
{
- iCode *ic;
- int cln = 0;
-
- lineHead = lineCurr = NULL;
-
- /* print the allocation information */
- if (allocInfo)
- printAllocInfo( currFunc, codeOutFile);
- /* 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$0 ==.",currFunc->name);
- _G.debugLine = 0;
- }
- /* stack pointer name */
- if (options.useXstack)
- spname = "_spx";
- else
+ iCode *ic;
+ int cln = 0;
+
+ lineHead = lineCurr = NULL;
+ recvCnt = 0;
+ /* print the allocation information */
+ if (allocInfo)
+ printAllocInfo (currFunc, codeOutBuf);
+ /* if debug information required */
+ if (options.debug && currFunc) {
+ debugFile->writeFunction (currFunc, lic);
+ }
+ /* stack pointer name */
spname = "sp";
-
-
- for (ic = lic ; ic ; ic = ic->next ) {
-
- if ( cln != ic->lineno ) {
- if ( options.debug ) {
- _G.debugLine = 1;
- emitcode("","C$%s$%d$%d$%d ==.",
- ic->filename,ic->lineno,
- ic->level,ic->block);
- _G.debugLine = 0;
- }
- 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;
-
- case UNARYMINUS:
- genUminus (ic);
- break;
-
- case IPUSH:
- 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;
-
- case CALL:
- genCall (ic);
- break;
-
- case PCALL:
- genPcall (ic);
- break;
-
- case FUNCTION:
- genFunction (ic);
- break;
-
- case ENDFUNCTION:
- genEndFunction (ic);
- break;
-
- case RETURN:
- genRet (ic);
- break;
-
- case LABEL:
- 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;
-
- case LE_OP:
- genCmpLe (ic,ifxForOp(IC_RESULT(ic),ic));
- break
-
- case GE_OP:
- genCmpGe (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
- case NE_OP:
- genCmpNe (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
- case EQ_OP:
- genCmpEq (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
- case AND_OP:
- 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;
-
- case BITWISEAND:
- genAnd (ic,ifxForOp(IC_RESULT(ic),ic));
- break;
-
- case INLINEASM:
- genInline (ic);
- break;
-
- case RRC:
- genRRC (ic);
- break;
-
- case RLC:
- genRLC (ic);
- break;
-
- case GETHBIT:
- genGetHbit (ic);
- break;
-
- case LEFT_OP:
- genLeftShift (ic);
- break;
-
- case RIGHT_OP:
- genRightShift (ic);
- break;
-
- case GET_VALUE_AT_ADDRESS:
- genPointerGet(ic);
- break;
-
- case '=' :
- if (POINTER_SET(ic))
- genPointerSet(ic);
- else
- genAssign(ic);
- break;
-
- case IFX:
- genIfx (ic,NULL);
- break;
-
- case ADDRESS_OF:
- genAddrOf (ic);
- break;
-
- case JUMPTABLE:
- genJumpTab (ic);
- break;
-
- case CAST:
- genCast (ic);
- break;
-
- case RECEIVE:
- genReceive(ic);
- break;
-
- case SEND:
- addSet(&_G.sendSet,ic);
- break;
-
- default :
- ic = ic;
- /* piCode(ic,stdout); */
-
- }
- }
-
-
- /* now we are ready to call the
- peep hole optimizer */
- if (!options.nopeep)
- peepHole (&lineHead);
-
- /* now do the actual printing */
- printLine (lineHead,codeOutFile);
- return;
+
+
+ for (ic = lic; ic; ic = ic->next) {
+
+ if (cln != ic->lineno) {
+ if (options.debug) {
+ debugFile->writeCLine (ic);
+ }
+ 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;
+
+ case UNARYMINUS:
+ genUminus (ic);
+ break;
+
+ case IPUSH:
+ 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;
+
+ case CALL:
+ genCall (ic);
+ break;
+
+ case PCALL:
+ genPcall (ic);
+ break;
+
+ case FUNCTION:
+ genFunction (ic);
+ break;
+
+ case ENDFUNCTION:
+ genEndFunction (ic);
+ break;
+
+ case RETURN:
+ genRet (ic);
+ break;
+
+ case LABEL:
+ 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;
+
+ case LE_OP:
+ genCmpLe (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case GE_OP:
+ genCmpGe (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case NE_OP:
+ genCmpNe (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case EQ_OP:
+ genCmpEq (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case AND_OP:
+ 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;
+
+ case BITWISEAND:
+ genAnd (ic, ifxForOp (IC_RESULT (ic), ic));
+ break;
+
+ case INLINEASM:
+ genInline (ic);
+ break;
+
+ case RRC:
+ genRRC (ic);
+ break;
+
+ case RLC:
+ genRLC (ic);
+ break;
+
+ case GETHBIT:
+ genGetHbit (ic);
+ break;
+
+ case LEFT_OP:
+ genLeftShift (ic);
+ break;
+
+ case RIGHT_OP:
+ genRightShift (ic);
+ break;
+
+ case GET_VALUE_AT_ADDRESS:
+ genPointerGet (ic, hasInc(IC_LEFT(ic),ic));
+ break;
+
+ case '=':
+ if (POINTER_SET (ic))
+ genPointerSet (ic, hasInc(IC_RESULT(ic),ic));
+ else
+ genAssign (ic);
+ break;
+
+ case IFX:
+ genIfx (ic, NULL);
+ break;
+
+ case ADDRESS_OF:
+ genAddrOf (ic);
+ break;
+
+ case JUMPTABLE:
+ genJumpTab (ic);
+ break;
+
+ case CAST:
+ genCast (ic);
+ break;
+
+ case RECEIVE:
+ genReceive (ic);
+ break;
+
+ case SEND:
+ addSet (&_G.sendSet, ic);
+ break;
+
+ case DUMMY_READ_VOLATILE:
+ genDummyRead (ic);
+ break;
+
+ default:
+ ic = ic;
+ }
+ }
+
+
+ /* now we are ready to call the
+ peep hole optimizer */
+ if (!options.nopeep)
+ peepHole (&lineHead);
+
+ /* now do the actual printing */
+ printLine (lineHead, codeOutBuf);
+ return;
}
projects / fw / sdcc / blobdiff