X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fz80%2Fgen.c;h=d2d02ba740cd46451b841ea5f523ddf1a7fa1812;hb=d7b30120ae115e8929d57e25038ca76dde13974e;hp=89fd2f2e18827b3d1772429dffeeae262587a3ec;hpb=b487511f2155fa77fa0bd178663db31315f867c7;p=fw%2Fsdcc diff --git a/src/z80/gen.c b/src/z80/gen.c index 89fd2f2e..d2d02ba7 100644 --- a/src/z80/gen.c +++ b/src/z80/gen.c @@ -1,25 +1,7 @@ /*------------------------------------------------------------------------- gen.c - Z80 specific code generator. - Benchmarks on dhry.c 2.1 with 32766 loops and a 10ms clock: - ticks dhry size - Base with asm strcpy / strcmp / memcpy: 23198 141 1A14 - Improved WORD push 22784 144 19AE - With label1 on 22694 144 197E - With label2 on 22743 144 198A - With label3 on 22776 144 1999 - With label4 on 22776 144 1999 - With all 'label' on 22661 144 196F - With loopInvariant on 20919 156 19AB - With loopInduction on Breaks 198B - With all working on 20796 158 196C - Slightly better genCmp(signed) 20597 159 195B - Better reg packing, first peephole 20038 163 1873 - With assign packing 19281 165 1849 - 5/3/00 17741 185 17B6 - With reg params for mul and div 16234 202 162D - - Michael Hope 2000 + Michael Hope 2000 Based on the mcs51 generator - Sandeep Dutta . sandeep.dutta@usa.net (1998) and - Jean-Louis VERN.jlvern@writeme.com (1999) @@ -45,13 +27,70 @@ -------------------------------------------------------------------------*/ +/* + Benchmarks on dhry.c 2.1 with 32766 loops and a 10ms clock: + ticks dhry size + Base with asm strcpy / strcmp / memcpy: 23198 141 1A14 + Improved WORD push 22784 144 19AE + With label1 on 22694 144 197E + With label2 on 22743 144 198A + With label3 on 22776 144 1999 + With label4 on 22776 144 1999 + With all 'label' on 22661 144 196F + With loopInvariant on 20919 156 19AB + With loopInduction on Breaks 198B + With all working on 20796 158 196C + Slightly better genCmp(signed) 20597 159 195B + Better reg packing, first peephole 20038 163 1873 + With assign packing 19281 165 1849 + 5/3/00 17741 185 17B6 + With reg params for mul and div 16234 202 162D + + 1. Starting again at 3 Aug 01 34965 93 219C + No asm strings + Includes long mul/div in code + 2. Optimised memcpy for acc use 32102 102 226B + 3. Optimised strcpy for acc use 27819 117 2237 + 3a Optimised memcpy fun + 4. Optimised strcmp fun 21999 149 2294 + 5. Optimised strcmp further 21660 151 228C + 6. Optimised memcpy by unroling 20885 157 2201 + 7. After turning loop induction on 19862 165 236D + 8. Same as 7 but with more info + 9. With asm optimised strings 17030 192 2223 + + 10 and below are with asm strings off. + + 10 Mucho optimisations 13562 201 1FCC + + Apparent advantage of turning on regparams: + 1. Cost of push + Decent case is push of a constant + - ld hl,#n; push hl: (10+11)*nargs + 2. Cost of pull from stack + Using asm with ld hl, etc + - ld hl,#2; add hl,sp; (ld bc,(hl); hl+=2)*nargs + 10+11+(7+6+7+6)*nargs + 3. Cost of fixing stack + - pop hl*nargs + 10*nargs + + So cost is (10+11+7+6+7+10)*nargs+10+11 + = 51*nargs+21 + = 123 for mul, div, strcmp, strcpy + Saving of (98298+32766+32766+32766)*123 = 24181308 + At 192 d/s for 682411768t, speed up to 199. Hmm. +*/ + #include #include #include #include -#ifdef HAVE_SYS_ISA_DEFS_H -#include +#if defined(__BORLANDC__) || defined(_MSC_VER) +#define STRCASECMP stricmp +#else +#define STRCASECMP strcasecmp #endif #include "z80.h" @@ -61,1846 +100,2984 @@ #include "SDCCglue.h" #include "newalloc.h" -/* this is the down and dirty file with all kinds of kludgy & hacky +/* 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 *spname ; -static char *_z80_return[] = {"l", "h", "e", "d" }; -static char *_gbz80_return[] = { "e", "d", "l", "h" }; +/* Z80 calling convention description. + Parameters are passed right to left. As the stack grows downwards, + the parameters are arranged in left to right in memory. + Parameters may be passed in the HL and DE registers with one + parameter per pair. + PENDING: What if the parameter is a long? + Everything is caller saves. i.e. the caller must save any registers + that it wants to preserve over the call. + GB: The return value is returned in DEHL. DE is normally used as a + working register pair. Caller saves allows it to be used for a + return value. + va args functions do not use register parameters. All arguments + are passed on the stack. + IX is used as an index register to the top of the local variable + area. ix-0 is the top most local variable. +*/ + +enum +{ + /* Set to enable debugging trace statements in the output assembly code. */ + DISABLE_DEBUG = 0 +}; + +static char *_z80_return[] = +{"l", "h", "e", "d"}; +static char *_gbz80_return[] = +{"e", "d", "l", "h"}; +static char *_fReceive[] = + { "c", "b", "e", "d" }; + static char **_fReturn; static char **_fTmp; -/* PENDING: messy */ -static char zero[20]; - -static char *accUse[] = {"a" }; -static char *hlUse[] = { "l", "h" }; -short rbank = -1; -short accInUse = 0 ; -short inLine = 0; -short debugLine = 0; -short nregssaved = 0; -extern int ptrRegReq ; -extern int nRegs; extern FILE *codeOutFile; -set *sendSet = NULL; -typedef enum { +enum + { + INT8MIN = -128, + INT8MAX = 127 + }; + +/** Enum covering all the possible register pairs. + */ +typedef enum + { PAIR_INVALID, + PAIR_AF, PAIR_BC, PAIR_DE, PAIR_HL, PAIR_IY, PAIR_IX, NUM_PAIRS -} PAIR_ID; + } PAIR_ID; -static struct { - const char *name; - const char *l; - const char *h; +static struct +{ + const char *name; + const char *l; + const char *h; } _pairs[NUM_PAIRS] = { - { "??", "?", "?" }, - { "bc", "c", "b" }, - { "de", "e", "d" }, - { "hl", "l", "h" }, - { "iy", "iy.l?", "iy.h?" }, - { "ix", "ix.l?", "ix.h?" } + { "??1", "?2", "?3" }, + { "af", "f", "a" }, + { "bc", "c", "b" }, + { "de", "e", "d" }, + { "hl", "l", "h" }, + { "iy", "iyl", "iyh" }, + { "ix", "ixl", "ixh" } }; -#define RESULTONSTACK(x) \ - (IC_RESULT(x) && IC_RESULT(x)->aop && \ - IC_RESULT(x)->aop->type == AOP_STK ) +// PENDING +#define ACC_NAME _pairs[PAIR_AF].h -#define MOVA(x) if (strcmp(x,"a")) emitcode("ld","a,%s",x); -#define CLRC emitcode("xor","a,a"); +enum + { + LSB, + MSB16, + MSB24, + MSB32 + }; -lineNode *lineHead = NULL; -lineNode *lineCurr = NULL; +/** Code generator persistent data. + */ +static struct +{ + /** Used to optimised setting up of a pair by remebering what it + contains and adjusting instead of reloading where possible. + */ + struct + { + AOP_TYPE last_type; + const char *base; + int offset; + } pairs[NUM_PAIRS]; + struct + { + int last; + int pushed; + int param_offset; + int offset; + int pushedBC; + int pushedDE; + } stack; + + struct + { + int pushedBC; + int pushedDE; + } calleeSaves; + + bool omitFramePtr; + int frameId; + int receiveOffset; + bool flushStatics; + bool in_home; + const char *lastFunctionName; + iCode *current_iCode; + bool preserveCarry; + + set *sendSet; + + struct + { + /** TRUE if the registers have already been saved. */ + bool saved; + } saves; + + struct + { + lineNode *head; + lineNode *current; + int isInline; + int isDebug; + allocTrace trace; + } lines; + + struct + { + allocTrace aops; + } trace; +} _G; -static const unsigned char SLMask[] = -{0xFF ,0xFE, 0xFC, 0xF8, 0xF0, 0xE0, 0xC0, 0x80, 0x00}; -static const unsigned char SRMask[] = -{0xFF, 0x7F, 0x3F, 0x1F, 0x0F, 0x07, 0x03, 0x01, 0x00}; +static const char *aopGet (asmop * aop, int offset, bool bit16); + +static const char *aopNames[] = { + "AOP_INVALID", + "AOP_LIT", + "AOP_REG", + "AOP_DIR", + "AOP_SFR", + "AOP_STK", + "AOP_IMMD", + "AOP_STR", + "AOP_CRY", + "AOP_IY", + "AOP_HL", + "AOP_ACC", + "AOP_HLREG", + "AOP_SIMPLELIT", + "AOP_EXSTK", + "AOP_PAIRPT", + "AOP_DUMMY" +}; -#define LSB 0 -#define MSB16 1 -#define MSB24 2 -#define MSB32 3 +static bool +isLastUse (iCode *ic, operand *op) +{ + bitVect *uses = bitVectCopy (OP_USES (op)); -/* Stack frame: - IX+4 param0 LH - IX+2 ret LH - IX+0 ix LH - IX-2 temp0 LH -*/ + while (!bitVectIsZero (uses)) + { + if (bitVectFirstBit (uses) == ic->key) + { + if (bitVectnBitsOn (uses) == 1) + { + return TRUE; + } + else + { + return FALSE; + } + } + bitVectUnSetBit (uses, bitVectFirstBit (uses)); + } -static struct { - struct { - AOP_TYPE last_type; - const char *lit; - int offset; - } pairs[NUM_PAIRS]; - struct { - int last; - int pushed; - int param_offset; - int offset; - int pushed_bc; - int pushed_de; - } stack; - int frameId; - bool flush_statics; - bool in_home; -} _G; + return FALSE; +} + +static PAIR_ID +_getTempPairId(void) +{ + if (IS_GB) + { + return PAIR_DE; + } + else + { + return PAIR_HL; + } +} -static char *aopGet(asmop *aop, int offset, bool bit16); +static const char * +_getTempPairName(void) +{ + return _pairs[_getTempPairId()].name; +} -static void _tidyUp(char *buf) +static bool +isPairInUse (PAIR_ID id, iCode *ic) { - /* Clean up the line so that it is 'prettier' */ - if (strchr(buf, ':')) { - /* Is a label - cant do anything */ - return; + if (id == PAIR_DE) + { + return bitVectBitValue (ic->rMask, D_IDX) || bitVectBitValue(ic->rMask, E_IDX); } - /* Change the first (and probably only) ' ' to a tab so - everything lines up. - */ - while (*buf) { - if (*buf == ' ') { - *buf = '\t'; + else if (id == PAIR_BC) + { + return bitVectBitValue (ic->rMask, B_IDX) || bitVectBitValue(ic->rMask, C_IDX); + } + else + { + wassertl (0, "Only implemented for DE and BC"); + return TRUE; + } +} + +static bool +isPairInUseNotInRet(PAIR_ID id, iCode *ic) +{ + bitVect *rInUse; + + rInUse = bitVectCplAnd (bitVectCopy (ic->rMask), ic->rUsed); + + if (id == PAIR_DE) + { + return bitVectBitValue (rInUse, D_IDX) || bitVectBitValue(rInUse, E_IDX); + } + else + { + wassertl (0, "Only implemented for DE"); + return TRUE; + } +} + +static PAIR_ID +getFreePairId (iCode *ic) +{ + if (!isPairInUse (PAIR_BC, ic)) + { + return PAIR_BC; + } + else if (IS_Z80 && !isPairInUse (PAIR_DE, ic)) + { + return PAIR_DE; + } + else + { + return PAIR_INVALID; + } +} + +static void +_tidyUp (char *buf) +{ + /* Clean up the line so that it is 'prettier' */ + if (strchr (buf, ':')) + { + /* Is a label - cant do anything */ return; - } - buf++; } + /* Change the first (and probably only) ' ' to a tab so + everything lines up. + */ + while (*buf) + { + if (*buf == ' ') + { + *buf = '\t'; + break; + } + buf++; + } +} + +static lineNode * +_newLineNode (char *line) +{ + lineNode *pl; + + pl = traceAlloc(&_G.lines.trace, Safe_alloc ( sizeof (lineNode))); + pl->line = traceAlloc(&_G.lines.trace, Safe_strdup (line)); + + return pl; +} + +static void +_vemit2 (const char *szFormat, va_list ap) +{ + char buffer[INITIAL_INLINEASM]; + + tvsprintf (buffer, sizeof(buffer), szFormat, ap); + + _tidyUp (buffer); + _G.lines.current = (_G.lines.current ? + connectLine (_G.lines.current, _newLineNode (buffer)) : + (_G.lines.head = _newLineNode (buffer))); + + _G.lines.current->isInline = _G.lines.isInline; + _G.lines.current->isDebug = _G.lines.isDebug; + _G.lines.current->ic = _G.current_iCode; +} + +static void +emit2 (const char *szFormat,...) +{ + va_list ap; + + va_start (ap, szFormat); + + _vemit2 (szFormat, ap); + + va_end (ap); } -static void emit2(const char *szFormat, ...) +static void +emitDebug (const char *szFormat,...) { - char buffer[256]; - va_list ap; + if (!DISABLE_DEBUG) + { + va_list ap; - va_start(ap, szFormat); + va_start (ap, szFormat); - tvsprintf(buffer, szFormat, ap); + _vemit2 (szFormat, ap); - _tidyUp(buffer); - lineCurr = (lineCurr ? - connectLine(lineCurr,newLineNode(buffer)) : - (lineHead = newLineNode(buffer))); + va_end (ap); + } +} - lineCurr->isInline = inLine; - lineCurr->isDebug = debugLine; +/*-----------------------------------------------------------------*/ +/* z80_emitDebuggerSymbol - associate the current code location */ +/* with a debugger symbol */ +/*-----------------------------------------------------------------*/ +void +z80_emitDebuggerSymbol (char * debugSym) +{ + _G.lines.isDebug = 1; + emit2 ("%s !equ .", debugSym); + emit2 ("!global", debugSym); + _G.lines.isDebug = 0; } /*-----------------------------------------------------------------*/ -/* emitcode - writes the code into a file : for now it is simple */ +/* emit2 - writes the code into a file : for now it is simple */ /*-----------------------------------------------------------------*/ -void emitcode (const char *inst, const char *fmt, ...) +void +_emit2 (const char *inst, const char *fmt,...) { - va_list ap; - char lb[MAX_INLINEASM]; - char *lbp = lb; + va_list ap; + char lb[INITIAL_INLINEASM]; + char *lbp = lb; - va_start(ap,fmt); + va_start (ap, fmt); - if (*inst != '\0') { - sprintf(lb,"%s\t",inst); - vsprintf(lb+(strlen(lb)),fmt,ap); - } else - vsprintf(lb,fmt,ap); + if (*inst != '\0') + { + sprintf (lb, "%s\t", inst); + vsprintf (lb + (strlen (lb)), fmt, ap); + } + else + vsprintf (lb, fmt, ap); - while (isspace(*lbp)) lbp++; + while (isspace (*lbp)) + lbp++; - if (lbp && *lbp) - lineCurr = (lineCurr ? - connectLine(lineCurr,newLineNode(lb)) : - (lineHead = newLineNode(lb))); - lineCurr->isInline = inLine; - lineCurr->isDebug = debugLine; - va_end(ap); + if (lbp && *lbp) + { + _G.lines.current = (_G.lines.current ? + connectLine (_G.lines.current, _newLineNode (lb)) : + (_G.lines.head = _newLineNode (lb))); + } + _G.lines.current->isInline = _G.lines.isInline; + _G.lines.current->ic = _G.current_iCode; + va_end (ap); } -/* Z80: - { "adjustsp", - "\tld hl,#-%d\n" - "\tadd hl,sp\n" - "\tld sp,hl" +static void +_emitMove(const char *to, const char *from) +{ + if (STRCASECMP(to, from) != 0) + { + emit2("ld %s,%s", to, from); } - { "prelude", - "push bc" - "push de" - "push ix" - "ld ix,#0" - "add ix,sp" - { "leave" - emitcode("ld", "sp,ix"); - emitcode("pop", "ix"); - emitcode("pop", "de"); + else + { + // Optimise it out. + // Could leave this to the peephole, but sometimes the peephole is inhibited. } } -*/ -const char *getPairName(asmop *aop) +void +aopDump(const char *plabel, asmop *aop) { - if (aop->type == AOP_REG) { - switch (aop->aopu.aop_reg[0]->rIdx) { - case C_IDX: - return "bc"; + int i; + char regbuf[9]; + char *rbp = regbuf; + + emitDebug("; Dump of %s: type %s size %u", plabel, aopNames[aop->type], aop->size); + switch (aop->type) + { + case AOP_EXSTK: + case AOP_STK: + emitDebug("; aop_stk %d", aop->aopu.aop_stk); break; - case E_IDX: - return "de"; + case AOP_REG: + for (i=aop->size-1;i>=0;i--) + *rbp++ = *(aop->aopu.aop_reg[i]->name); + *rbp = '\0'; + emitDebug("; reg = %s", regbuf); break; - case L_IDX: - return "hl"; + case AOP_PAIRPTR: + emitDebug("; pairptr = (%s)", _pairs[aop->aopu.aop_pairId].name); + + default: + /* No information. */ break; - } } - else if (aop->type == AOP_STR) { - switch (*aop->aopu.aop_str[0]) { - case 'c': - return "bc"; - break; - case 'e': - return "de"; - break; - case 'l': - return "hl"; - break; - } +} + +static void +_moveA(const char *moveFrom) +{ + // Let the peephole optimiser take care of redundent loads + _emitMove(ACC_NAME, moveFrom); +} + +static void +_clearCarry(void) +{ + emit2("xor a,a"); +} + +const char * +getPairName (asmop * aop) +{ + if (aop->type == AOP_REG) + { + switch (aop->aopu.aop_reg[0]->rIdx) + { + case C_IDX: + return "bc"; + break; + case E_IDX: + return "de"; + break; + case L_IDX: + return "hl"; + break; + } } - wassert(0); - return NULL; + else if (aop->type == AOP_STR || aop->type == AOP_HLREG) + { + int i; + for (i = 0; i < NUM_PAIRS; i++) + { + if (strcmp(aop->aopu.aop_str[0], _pairs[i].l) == 0) + { + return _pairs[i].name; + } + } + } + wassertl (0, "Tried to get the pair name of something that isn't a pair"); + return NULL; } -static PAIR_ID getPairId(asmop *aop) +static PAIR_ID +getPairId (asmop * aop) { - if (aop->size == 2) { - if (aop->type == AOP_REG) { - if ((aop->aopu.aop_reg[0]->rIdx == C_IDX)&&(aop->aopu.aop_reg[1]->rIdx == B_IDX)) { - return PAIR_BC; - } - if ((aop->aopu.aop_reg[0]->rIdx == E_IDX)&&(aop->aopu.aop_reg[1]->rIdx == D_IDX)) { - return PAIR_DE; - } - if ((aop->aopu.aop_reg[0]->rIdx == L_IDX)&&(aop->aopu.aop_reg[1]->rIdx == H_IDX)) { - return PAIR_HL; - } - } - if (aop->type == AOP_STR) { - if (!strcmp(aop->aopu.aop_str[0], "c")&&!strcmp(aop->aopu.aop_str[1], "b")) { - return PAIR_BC; - } - if (!strcmp(aop->aopu.aop_str[0], "e")&&!strcmp(aop->aopu.aop_str[1], "d")) { - return PAIR_DE; - } - if (!strcmp(aop->aopu.aop_str[0], "l")&&!strcmp(aop->aopu.aop_str[1], "h")) { - return PAIR_HL; - } - } + if (aop->size == 2) + { + if (aop->type == AOP_REG) + { + if ((aop->aopu.aop_reg[0]->rIdx == C_IDX) && (aop->aopu.aop_reg[1]->rIdx == B_IDX)) + { + return PAIR_BC; + } + if ((aop->aopu.aop_reg[0]->rIdx == E_IDX) && (aop->aopu.aop_reg[1]->rIdx == D_IDX)) + { + return PAIR_DE; + } + if ((aop->aopu.aop_reg[0]->rIdx == L_IDX) && (aop->aopu.aop_reg[1]->rIdx == H_IDX)) + { + return PAIR_HL; + } + } + else if (aop->type == AOP_STR || aop->type == AOP_HLREG) + { + int i; + for (i = 0; i < NUM_PAIRS; i++) + { + if (!strcmp (aop->aopu.aop_str[0], _pairs[i].l) && !strcmp (aop->aopu.aop_str[1], _pairs[i].h)) + { + return i; + } + } + } } - return PAIR_INVALID; + return PAIR_INVALID; } /** Returns TRUE if the registers used in aop form a pair (BC, DE, HL) */ -bool isPair(asmop *aop) +bool +isPair (asmop * aop) { - return (getPairId(aop) != PAIR_INVALID); + return (getPairId (aop) != PAIR_INVALID); } -bool isPtrPair(asmop *aop) +/** Returns TRUE if the registers used in aop cannot be split into high + and low halves */ +bool +isUnsplitable (asmop * aop) { - PAIR_ID pairId = getPairId(aop); - switch (pairId) { + switch (getPairId (aop)) + { + case PAIR_IX: + case PAIR_IY: + return TRUE; + default: + return FALSE; + } + return FALSE; +} + +bool +isPtrPair (asmop * aop) +{ + PAIR_ID pairId = getPairId (aop); + switch (pairId) + { case PAIR_HL: case PAIR_IY: case PAIR_IX: - return TRUE; + return TRUE; default: - return FALSE; + return FALSE; } } + +static void +spillPair (PAIR_ID pairId) +{ + _G.pairs[pairId].last_type = AOP_INVALID; + _G.pairs[pairId].base = NULL; +} + +/* Given a register name, spill the pair (if any) the register is part of */ +static void +spillPairReg (const char *regname) +{ + if (strlen(regname)==1) + { + switch (*regname) + { + case 'h': + case 'l': + spillPair(PAIR_HL); + break; + case 'd': + case 'e': + spillPair(PAIR_DE); + break; + case 'b': + case 'c': + spillPair(PAIR_BC); + break; + } + } +} + /** Push a register pair onto the stack */ -void genPairPush(asmop *aop) +void +genPairPush (asmop * aop) +{ + emit2 ("push %s", getPairName (aop)); +} + +static void +_push (PAIR_ID pairId) +{ + emit2 ("push %s", _pairs[pairId].name); + _G.stack.pushed += 2; +} + +static void +_pop (PAIR_ID pairId) { - emitcode("push", "%s", getPairName(aop)); + emit2 ("pop %s", _pairs[pairId].name); + _G.stack.pushed -= 2; + spillPair (pairId); +} + +void +genMovePairPair (PAIR_ID srcPair, PAIR_ID dstPair) +{ + switch (dstPair) + { + case PAIR_IX: + case PAIR_IY: + case PAIR_AF: + _push(srcPair); + _pop(dstPair); + break; + case PAIR_BC: + case PAIR_DE: + case PAIR_HL: + if (srcPair == PAIR_IX || srcPair == PAIR_IY) + { + _push(srcPair); + _pop(dstPair); + } + else + { + emit2("ld %s,%s",_pairs[dstPair].l,_pairs[srcPair].l); + emit2("ld %s,%s",_pairs[dstPair].h,_pairs[srcPair].h); + } + default: + wassertl (0, "Tried to move a nonphysical pair"); + } + _G.pairs[dstPair].last_type = _G.pairs[srcPair].last_type; + _G.pairs[dstPair].base = _G.pairs[srcPair].base; + _G.pairs[dstPair].offset = _G.pairs[srcPair].offset; } /*-----------------------------------------------------------------*/ /* newAsmop - creates a new asmOp */ /*-----------------------------------------------------------------*/ -static asmop *newAsmop (short type) +static asmop * +newAsmop (short type) { - asmop *aop; + asmop *aop; - aop = Safe_calloc(1,sizeof(asmop)); - aop->type = type; - return aop; + aop = traceAlloc(&_G.trace.aops, Safe_alloc (sizeof (asmop))); + aop->type = type; + return aop; } /*-----------------------------------------------------------------*/ /* aopForSym - for a true symbol */ /*-----------------------------------------------------------------*/ -static asmop *aopForSym (iCode *ic,symbol *sym,bool result, bool requires_a) +static asmop * +aopForSym (iCode * ic, symbol * sym, bool result, bool requires_a) { - asmop *aop; - memmap *space; + asmop *aop; + memmap *space; - wassert(ic); - wassert(sym); - wassert(sym->etype); + wassert (ic); + wassert (sym); + wassert (sym->etype); - space = SPEC_OCLS(sym->etype); + space = SPEC_OCLS (sym->etype); - /* if already has one */ - if (sym->aop) - return sym->aop; - - /* Assign depending on the storage class */ - if (sym->onStack || sym->iaccess) { - emitcode("", "; AOP_STK for %s", sym->rname); - sym->aop = aop = newAsmop(AOP_STK); - aop->size = getSize(sym->type); - aop->aopu.aop_stk = sym->stack; - return aop; + /* if already has one */ + if (sym->aop) + { + return sym->aop; } - /* 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 = 2; - return aop; + /* Assign depending on the storage class */ + if (sym->onStack || sym->iaccess) + { + /* The pointer that is used depends on how big the offset is. + Normally everything is AOP_STK, but for offsets of < -128 or + > 127 on the Z80 an extended stack pointer is used. + */ + if (IS_Z80 && (_G.omitFramePtr || sym->stack < INT8MIN || sym->stack > (int)(INT8MAX-getSize (sym->type)))) + { + emitDebug ("; AOP_EXSTK for %s", sym->rname); + sym->aop = aop = newAsmop (AOP_EXSTK); + } + else + { + emitDebug ("; AOP_STK for %s", sym->rname); + sym->aop = aop = newAsmop (AOP_STK); + } + + aop->size = getSize (sym->type); + aop->aopu.aop_stk = sym->stack; + return aop; } - if (IS_GB) { - /* if it is in direct space */ - if (IN_REGSP(space) && !requires_a) { - sym->aop = aop = newAsmop (AOP_SFR); - aop->aopu.aop_dir = sym->rname ; - aop->size = getSize(sym->type); - emitcode("", "; AOP_SFR for %s", sym->rname); + /* special case for a function */ + if (IS_FUNC (sym->type)) + { + sym->aop = aop = newAsmop (AOP_IMMD); + aop->aopu.aop_immd = traceAlloc(&_G.trace.aops, Safe_strdup (sym->rname)); + aop->size = 2; return aop; - } } - /* only remaining is far space */ - /* in which case DPTR gets the address */ - if (IS_GB) { - emitcode("", "; AOP_HL for %s", sym->rname); - sym->aop = aop = newAsmop(AOP_HL); + if( IN_REGSP( space )) + { /*.p.t.20030716 minor restructure to add SFR support to the Z80 */ + if (IS_GB) + { + /* if it is in direct space */ + if( !requires_a ) + { + sym->aop = aop = newAsmop (AOP_SFR); + aop->aopu.aop_dir = sym->rname; + aop->size = getSize (sym->type); + emitDebug ("; AOP_SFR for %s", sym->rname); + return aop; + } + } + else + { /*.p.t.20030716 adding SFR support to the Z80 port */ + aop = newAsmop (AOP_SFR); + sym->aop = aop; + aop->aopu.aop_dir = sym->rname; + aop->size = getSize( sym->type ); + aop->paged = FUNC_REGBANK(sym->type); + aop->bcInUse = isPairInUse( PAIR_BC, ic ); + aop->deInUse = isPairInUse( PAIR_DE, ic ); + emitDebug( ";Z80 AOP_SFR for %s banked:%d bc:%d de:%d", sym->rname, FUNC_REGBANK(sym->type), aop->bcInUse, aop->deInUse ); + + return( aop ); + } + } + + /* only remaining is far space */ + /* in which case DPTR gets the address */ + if (IS_GB) + { + emitDebug ("; AOP_HL for %s", sym->rname); + sym->aop = aop = newAsmop (AOP_HL); } - else { - sym->aop = aop = newAsmop(AOP_IY); + else + { + sym->aop = aop = newAsmop (AOP_IY); } - aop->size = getSize(sym->type); - aop->aopu.aop_dir = sym->rname; + aop->size = getSize (sym->type); + aop->aopu.aop_dir = sym->rname; - /* if it is in code space */ - if (IN_CODESPACE(space)) - aop->code = 1; + /* if it is in code space */ + if (IN_CODESPACE (space)) + aop->code = 1; - return aop; + return aop; } /*-----------------------------------------------------------------*/ /* aopForRemat - rematerialzes an object */ /*-----------------------------------------------------------------*/ -static asmop *aopForRemat (symbol *sym) +static asmop * +aopForRemat (symbol * sym) { - char *s = buffer; - iCode *ic = sym->rematiCode; - asmop *aop = newAsmop(AOP_IMMD); + char *s = buffer; + iCode *ic = sym->rematiCode; + asmop *aop = newAsmop (AOP_IMMD); - while (1) { - /* if plus or minus print the right hand side */ - if (ic->op == '+' || ic->op == '-') { - /* PENDING: for re-target */ - sprintf(s,"0x%04x %c ",(int) operandLitValue(IC_RIGHT(ic)), - ic->op ); - s += strlen(s); - ic = OP_SYMBOL(IC_LEFT(ic))->rematiCode; - continue ; - } - /* we reached the end */ - sprintf(s,"%s",OP_SYMBOL(IC_LEFT(ic))->rname); - break; + while (1) + { + /* if plus or minus print the right hand side */ + if (ic->op == '+' || ic->op == '-') + { + /* PENDING: for re-target */ + sprintf (s, "0x%04x %c ", (int) operandLitValue (IC_RIGHT (ic)), + ic->op); + s += strlen (s); + ic = OP_SYMBOL (IC_LEFT (ic))->rematiCode; + continue; + } + /* we reached the end */ + sprintf (s, "%s", OP_SYMBOL (IC_LEFT (ic))->rname); + break; } - aop->aopu.aop_immd = Safe_calloc(1,strlen(buffer)+1); - strcpy(aop->aopu.aop_immd,buffer); - return aop; + aop->aopu.aop_immd = traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + return aop; } /*-----------------------------------------------------------------*/ /* regsInCommon - two operands have some registers in common */ /*-----------------------------------------------------------------*/ -bool regsInCommon (operand *op1, operand *op2) +bool +regsInCommon (operand * op1, operand * op2) { - symbol *sym1, *sym2; - int i; + symbol *sym1, *sym2; + int i; - /* if they have registers in common */ - if (!IS_SYMOP(op1) || !IS_SYMOP(op2)) - return FALSE ; + /* if they have registers in common */ + if (!IS_SYMOP (op1) || !IS_SYMOP (op2)) + return FALSE; - sym1 = OP_SYMBOL(op1); - sym2 = OP_SYMBOL(op2); + sym1 = OP_SYMBOL (op1); + sym2 = OP_SYMBOL (op2); - if (sym1->nRegs == 0 || sym2->nRegs == 0) - return FALSE ; + if (sym1->nRegs == 0 || sym2->nRegs == 0) + return FALSE; - for (i = 0 ; i < sym1->nRegs ; i++) { - int j; - if (!sym1->regs[i]) - continue ; + for (i = 0; i < sym1->nRegs; i++) + { + int j; + if (!sym1->regs[i]) + continue; - for (j = 0 ; j < sym2->nRegs ;j++ ) { - if (!sym2->regs[j]) - continue ; + for (j = 0; j < sym2->nRegs; j++) + { + if (!sym2->regs[j]) + continue; - if (sym2->regs[j] == sym1->regs[i]) - return TRUE ; + if (sym2->regs[j] == sym1->regs[i]) + return TRUE; } } - return FALSE ; + return FALSE; } /*-----------------------------------------------------------------*/ /* operandsEqu - equivalent */ /*-----------------------------------------------------------------*/ -bool operandsEqu ( operand *op1, operand *op2) +bool +operandsEqu (operand * op1, operand * op2) { - symbol *sym1, *sym2; - - /* if they not symbols */ - if (!IS_SYMOP(op1) || !IS_SYMOP(op2)) - return FALSE; + symbol *sym1, *sym2; - sym1 = OP_SYMBOL(op1); - sym2 = OP_SYMBOL(op2); + /* if they not symbols */ + if (!IS_SYMOP (op1) || !IS_SYMOP (op2)) + return FALSE; - /* if both are itemps & one is spilt - and the other is not then false */ - if (IS_ITEMP(op1) && IS_ITEMP(op2) && - sym1->isspilt != sym2->isspilt ) - return FALSE ; + sym1 = OP_SYMBOL (op1); + sym2 = OP_SYMBOL (op2); - /* if they are the same */ - if (sym1 == sym2) - return 1; + /* 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 (strcmp(sym1->rname,sym2->rname) == 0) - return 2; + /* if they are the same */ + if (sym1 == sym2) + return 1; + if (sym1->rname[0] && sym2->rname[0] + && strcmp (sym1->rname, sym2->rname) == 0) + return 2; - /* if left is a tmp & right is not */ - if (IS_ITEMP(op1) && - !IS_ITEMP(op2) && - sym1->isspilt && - (sym1->usl.spillLoc == sym2)) - return 3; + /* if left is a tmp & right is not */ + if (IS_ITEMP (op1) && + !IS_ITEMP (op2) && + sym1->isspilt && + (sym1->usl.spillLoc == sym2)) + return 3; - if (IS_ITEMP(op2) && - !IS_ITEMP(op1) && - sym2->isspilt && - sym1->level > 0 && - (sym2->usl.spillLoc == sym1)) - return 4; + if (IS_ITEMP (op2) && + !IS_ITEMP (op1) && + sym2->isspilt && + sym1->level > 0 && + (sym2->usl.spillLoc == sym1)) + return 4; - return FALSE; + return FALSE; } /*-----------------------------------------------------------------*/ /* sameRegs - two asmops have the same registers */ /*-----------------------------------------------------------------*/ -bool sameRegs (asmop *aop1, asmop *aop2 ) +bool +sameRegs (asmop * aop1, asmop * aop2) { - int i; + int i; - if (aop1->type == AOP_SFR || - aop2->type == AOP_SFR) - return FALSE; + if (aop1->type == AOP_SFR || + aop2->type == AOP_SFR) + return FALSE; - if (aop1 == aop2) - return TRUE; + if (aop1 == aop2) + return TRUE; - if (aop1->type != AOP_REG || - aop2->type != AOP_REG ) - return FALSE; + if (aop1->type != AOP_REG || + aop2->type != AOP_REG) + return FALSE; - if (aop1->size != aop2->size) - return FALSE ; + if (aop1->size != aop2->size) + return FALSE; - for (i = 0 ; i < aop1->size ; i++ ) - if (aop1->aopu.aop_reg[i] != - aop2->aopu.aop_reg[i] ) - return FALSE ; + for (i = 0; i < aop1->size; i++) + if (aop1->aopu.aop_reg[i] != + aop2->aopu.aop_reg[i]) + return FALSE; - return TRUE ; + return TRUE; } /*-----------------------------------------------------------------*/ /* aopOp - allocates an asmop for an operand : */ /*-----------------------------------------------------------------*/ -static void aopOp (operand *op, iCode *ic, bool result, bool requires_a) +static void +aopOp (operand * op, iCode * ic, bool result, bool requires_a) { - asmop *aop; - symbol *sym; - int i; + asmop *aop; + symbol *sym; + int i; - if (!op) - return ; + if (!op) + return; - /* if this a literal */ - if (IS_OP_LITERAL(op)) { - op->aop = aop = newAsmop(AOP_LIT); - aop->aopu.aop_lit = op->operand.valOperand; - aop->size = getSize(operandType(op)); - return; + /* if this a literal */ + if (IS_OP_LITERAL (op)) + { + op->aop = aop = newAsmop (AOP_LIT); + aop->aopu.aop_lit = op->operand.valOperand; + aop->size = getSize (operandType (op)); + return; } - /* if already has a asmop then continue */ - if (op->aop) - return ; + /* if already has a asmop then continue */ + if (op->aop) + { + if (op->aop->type == AOP_SFR) + { + op->aop->bcInUse = isPairInUse( PAIR_BC, ic ); + op->aop->deInUse = isPairInUse( PAIR_DE, ic ); + } + return; + } - /* if the underlying symbol has a aop */ - if (IS_SYMOP(op) && OP_SYMBOL(op)->aop) { - op->aop = OP_SYMBOL(op)->aop; - return; + /* if the underlying symbol has a aop */ + if (IS_SYMOP (op) && OP_SYMBOL (op)->aop) + { + op->aop = OP_SYMBOL (op)->aop; + if (op->aop->type == AOP_SFR) + { + op->aop->bcInUse = isPairInUse( PAIR_BC, ic ); + op->aop->deInUse = isPairInUse( PAIR_DE, ic ); + } + return; } - /* if this is a true symbol */ - if (IS_TRUE_SYMOP(op)) { - op->aop = aopForSym(ic, OP_SYMBOL(op), result, requires_a); - return ; + /* if this is a true symbol */ + if (IS_TRUE_SYMOP (op)) + { + op->aop = aopForSym (ic, OP_SYMBOL (op), result, requires_a); + return; } - /* this is a temporary : this has - only four choices : - a) register - b) spillocation - c) rematerialize - d) conditional - e) can be a return use only */ + /* this is a temporary : this has + only four choices : + a) register + b) spillocation + c) rematerialize + d) conditional + e) can be a return use only */ - sym = OP_SYMBOL(op); + sym = OP_SYMBOL (op); - /* if the type is a conditional */ - if (sym->regType == REG_CND) { - aop = op->aop = sym->aop = newAsmop(AOP_CRY); - aop->size = 0; - return; + /* if the type is a conditional */ + if (sym->regType == REG_CND) + { + aop = op->aop = sym->aop = newAsmop (AOP_CRY); + aop->size = 0; + return; } - /* if it is spilt then two situations - a) is rematerialize - b) has a spill location */ - if (sym->isspilt || sym->nRegs == 0) { - /* rematerialize it NOW */ - if (sym->remat) { - sym->aop = op->aop = aop = - aopForRemat (sym); - aop->size = getSize(sym->type); - 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) { - int i; - if (sym->accuse == ACCUSE_A) { - aop = op->aop = sym->aop = newAsmop(AOP_ACC); - aop->size = getSize(sym->type); - for ( i = 0 ; i < 2 ; i++ ) - aop->aopu.aop_str[i] = accUse[i]; - } - else if (sym->accuse == ACCUSE_HL) { - wassert(!IS_GB); - aop = op->aop = sym->aop = newAsmop(AOP_HLREG); - aop->size = getSize(sym->type); - for ( i = 0 ; i < 2 ; i++ ) - aop->aopu.aop_str[i] = hlUse[i]; - } - else - wassert(0); - return; - } + if (sym->ruonly) + { + int i; + aop = op->aop = sym->aop = newAsmop (AOP_STR); + aop->size = getSize (sym->type); + for (i = 0; i < 4; i++) + aop->aopu.aop_str[i] = _fReturn[i]; + return; + } - if (sym->ruonly ) { - int i; - aop = op->aop = sym->aop = newAsmop(AOP_STR); - aop->size = getSize(sym->type); - for ( i = 0 ; i < 4 ; i++ ) - aop->aopu.aop_str[i] = _fReturn[i]; - return; + if (sym->accuse) + { + if (sym->accuse == ACCUSE_A) + { + aop = op->aop = sym->aop = newAsmop (AOP_ACC); + aop->size = getSize (sym->type); + wassertl(aop->size == 1, "Internal error: Caching in A, but too big to fit in A"); + + aop->aopu.aop_str[0] = _pairs[PAIR_AF].h; + } + else if (sym->accuse == ACCUSE_SCRATCH) + { + aop = op->aop = sym->aop = newAsmop (AOP_HLREG); + aop->size = getSize (sym->type); + wassertl(aop->size <= 2, "Internal error: Caching in HL, but too big to fit in HL"); + aop->aopu.aop_str[0] = _pairs[PAIR_HL].l; + aop->aopu.aop_str[1] = _pairs[PAIR_HL].h; + } + else if (sym->accuse == ACCUSE_IY) + { + aop = op->aop = sym->aop = newAsmop (AOP_HLREG); + aop->size = getSize (sym->type); + wassertl(aop->size <= 2, "Internal error: Caching in IY, but too big to fit in IY"); + aop->aopu.aop_str[0] = _pairs[PAIR_IY].l; + aop->aopu.aop_str[1] = _pairs[PAIR_IY].h; + } + else + { + wassertl (0, "Marked as being allocated into A or HL but is actually in neither"); + } + return; + } + + if (sym->usl.spillLoc) + { + asmop *oldAsmOp = NULL; + + if (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, requires_a); + 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; } - /* else spill location */ - sym->aop = op->aop = aop = - aopForSym(ic,sym->usl.spillLoc,result, requires_a); - aop->size = getSize(sym->type); - return; + /* else must be a dummy iTemp */ + sym->aop = op->aop = aop = newAsmop (AOP_DUMMY); + aop->size = getSize (sym->type); + return; } - /* must be in a register */ - sym->aop = op->aop = aop = newAsmop(AOP_REG); - aop->size = sym->nRegs; - for ( i = 0 ; i < sym->nRegs ;i++) - aop->aopu.aop_reg[i] = sym->regs[i]; + /* must be in a register */ + sym->aop = op->aop = aop = newAsmop (AOP_REG); + aop->size = sym->nRegs; + for (i = 0; i < sym->nRegs; i++) + aop->aopu.aop_reg[i] = sym->regs[i]; } /*-----------------------------------------------------------------*/ /* freeAsmop - free up the asmop given to an operand */ /*----------------------------------------------------------------*/ -static void freeAsmop (operand *op, asmop *aaop, iCode *ic) +static void +freeAsmop (operand * op, asmop * aaop, iCode * ic) { - asmop *aop ; + asmop *aop; - if (!op) - aop = aaop; - else - aop = op->aop; + if (!op) + aop = aaop; + else + aop = op->aop; - if (!aop) - return ; + if (!aop) + return; + + if (aop->freed) + goto dealloc; - if (aop->freed) - goto dealloc; + aop->freed = 1; + + if (aop->type == AOP_PAIRPTR && IS_Z80 && aop->aopu.aop_pairId == PAIR_DE) + { + _pop (aop->aopu.aop_pairId); + } - aop->freed = 1; + if (getPairId (aop) == PAIR_HL) + { + spillPair (PAIR_HL); + } dealloc: - /* all other cases just dealloc */ - if (op ) { - op->aop = NULL; - if (IS_SYMOP(op)) { - OP_SYMBOL(op)->aop = NULL; - /* if the symbol has a spill */ - if (SPIL_LOC(op)) - SPIL_LOC(op)->aop = NULL; + /* all other cases just dealloc */ + if (op) + { + op->aop = NULL; + if (IS_SYMOP (op)) + { + OP_SYMBOL (op)->aop = NULL; + /* if the symbol has a spill */ + if (SPIL_LOC (op)) + SPIL_LOC (op)->aop = NULL; } } + } -bool isLitWord(asmop *aop) +bool +isLitWord (asmop * aop) { - /* if (aop->size != 2) - return FALSE;*/ - switch (aop->type) { + /* if (aop->size != 2) + return FALSE; */ + switch (aop->type) + { case AOP_IMMD: case AOP_LIT: - return TRUE; + return TRUE; default: - return FALSE; + return FALSE; } } -char *aopGetLitWordLong(asmop *aop, int offset, bool with_hash) +char * +aopGetLitWordLong (asmop * aop, int offset, bool with_hash) { - char *s = buffer ; - char *rs; - -#if 0 - if (aop->size != 2 && aop->type != AOP_HL) - return NULL; -#endif - /* depending on type */ - switch (aop->type) { + /* depending on type */ + switch (aop->type) + { case AOP_HL: case AOP_IY: case AOP_IMMD: - /* PENDING: for re-target */ - if (with_hash) - tsprintf(s, "!hashedstr + %d", aop->aopu.aop_immd, offset); - else - tsprintf(s, "%s + %d", aop->aopu.aop_immd, offset); - rs = Safe_calloc(1,strlen(s)+1); - strcpy(rs,s); - return rs; - case AOP_LIT: { - value * val = aop->aopu.aop_lit; - /* if it is a float then it gets tricky */ - /* otherwise it is fairly simple */ - if (!IS_FLOAT(val->type)) { - unsigned long v = floatFromVal(val); - - if (offset == 2) - v >>= 16; - - if (with_hash) - tsprintf(buffer, "!immedword", v); - else - tsprintf(buffer, "!constword", v); - rs = Safe_calloc(1,strlen(buffer)+1); - return strcpy (rs,buffer); - } - else { - /* A float */ - Z80_FLOAT f; - convertFloat(&f, floatFromVal(val)); + /* PENDING: for re-target */ if (with_hash) - tsprintf(buffer, "!immedword", f.w[offset/2]); + { + tsprintf (buffer, sizeof(buffer), + "!hashedstr + %d", aop->aopu.aop_immd, offset); + } + else if (offset == 0) + { + tsprintf (buffer, sizeof(buffer), + "%s", aop->aopu.aop_immd); + } else - tsprintf(buffer, "!constword", f.w[offset/2]); - rs = Safe_calloc(1,strlen(buffer)+1); - return strcpy (rs,buffer); - } - } + { + tsprintf (buffer, sizeof(buffer), + "%s + %d", aop->aopu.aop_immd, offset); + } + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + + case AOP_LIT: + { + value *val = aop->aopu.aop_lit; + /* if it is a float then it gets tricky */ + /* otherwise it is fairly simple */ + if (!IS_FLOAT (val->type)) + { + unsigned long v = (unsigned long) floatFromVal (val); + + if (offset == 2) + { + v >>= 16; + } + else if (offset == 0) + { + // OK + } + else + { + wassertl(0, "Encountered an invalid offset while fetching a literal"); + } + + if (with_hash) + tsprintf (buffer, sizeof(buffer), "!immedword", v); + else + tsprintf (buffer, sizeof(buffer), "!constword", v); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } + else + { + union { + float f; + unsigned char c[4]; + } + fl; + unsigned int i; + + /* it is type float */ + fl.f = (float) floatFromVal (val); + +#ifdef WORDS_BIGENDIAN + i = fl.c[3-offset] | (fl.c[3-offset-1]<<8); +#else + i = fl.c[offset] | (fl.c[offset+1]<<8); +#endif + if (with_hash) + tsprintf (buffer, sizeof(buffer), "!immedword", i); + else + tsprintf (buffer, sizeof(buffer), "!constword", i); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } + } default: - return NULL; + return NULL; } } -char *aopGetWord(asmop *aop, int offset) +char * +aopGetWord (asmop * aop, int offset) { - return aopGetLitWordLong(aop, offset, TRUE); + return aopGetLitWordLong (aop, offset, TRUE); } -bool isPtr(const char *s) +bool +isPtr (const char *s) { - if (!strcmp(s, "hl")) - return TRUE; - if (!strcmp(s, "ix")) - return TRUE; - if (!strcmp(s, "iy")) - return TRUE; - return FALSE; + if (!strcmp (s, "hl")) + return TRUE; + if (!strcmp (s, "ix")) + return TRUE; + if (!strcmp (s, "iy")) + return TRUE; + return FALSE; } -static void adjustPair(const char *pair, int *pold, int new) +static void +adjustPair (const char *pair, int *pold, int new) { - wassert(pair); + wassert (pair); - while (*pold < new) { - emitcode("inc", "%s", pair); - (*pold)++; + while (*pold < new) + { + emit2 ("inc %s", pair); + (*pold)++; } - while (*pold > new) { - emitcode("dec", "%s", pair); - (*pold)--; + while (*pold > new) + { + emit2 ("dec %s", pair); + (*pold)--; } } -static void spillPair(PAIR_ID pairId) -{ - _G.pairs[pairId].last_type = AOP_INVALID; - _G.pairs[pairId].lit = NULL; -} - -static void spillCached(void) +static void +spillCached (void) { - spillPair(PAIR_HL); - spillPair(PAIR_IY); + spillPair (PAIR_HL); + spillPair (PAIR_IY); } -static bool requiresHL(asmop *aop) +static bool +requiresHL (asmop * aop) { - switch (aop->type) { + switch (aop->type) + { + case AOP_IY: case AOP_HL: case AOP_STK: - return TRUE; + case AOP_EXSTK: + case AOP_HLREG: + return TRUE; default: - return FALSE; + return FALSE; } } -static char *fetchLitSpecial(asmop *aop, bool negate, bool xor) +static void +fetchLitPair (PAIR_ID pairId, asmop * left, int offset) { - unsigned long v; - value * val = aop->aopu.aop_lit; + const char *l, *base; + const char *pair = _pairs[pairId].name; + l = aopGetLitWordLong (left, offset, FALSE); + base = aopGetLitWordLong (left, 0, FALSE); + wassert (l && pair && base); - wassert(aop->type == AOP_LIT); - wassert(!IS_FLOAT(val->type)); - - v = floatFromVal(val); - - if (xor) - v ^= 0x8000; - if (negate) - v = -v; - v &= 0xFFFF; - - tsprintf(buffer, "!immedword", v); - return gc_strdup(buffer); + if (isPtr (pair)) + { + if (pairId == PAIR_HL || pairId == PAIR_IY) + { + if (_G.pairs[pairId].last_type == left->type) + { + if (_G.pairs[pairId].base && !strcmp (_G.pairs[pairId].base, base)) + { + if (pairId == PAIR_HL && abs (_G.pairs[pairId].offset - offset) < 3) + { + adjustPair (pair, &_G.pairs[pairId].offset, offset); + return; + } + if (pairId == PAIR_IY && (offset >= INT8MIN && offset <= INT8MAX)) + { + return; + } + } + } + } + _G.pairs[pairId].last_type = left->type; + _G.pairs[pairId].base = traceAlloc(&_G.trace.aops, Safe_strdup (base)); + _G.pairs[pairId].offset = offset; + } + /* Both a lit on the right and a true symbol on the left */ + emit2 ("ld %s,!hashedstr", pair, l); } -static void fetchLitPair(PAIR_ID pairId, asmop *left, int offset) +static PAIR_ID +makeFreePairId (iCode *ic, bool *pisUsed) { - const char *l; - const char *pair = _pairs[pairId].name; - l = aopGetLitWordLong(left, 0, FALSE); - wassert(l && pair); - - if (isPtr(pair)) { - if (pairId == PAIR_HL || pairId == PAIR_IY) { - if (_G.pairs[pairId].last_type == left->type) { - if (_G.pairs[pairId].lit && !strcmp(_G.pairs[pairId].lit, l)) { - if (pairId == PAIR_HL && abs(_G.pairs[pairId].offset - offset) < 3) { - adjustPair(pair, &_G.pairs[pairId].offset, offset); - return; + *pisUsed = FALSE; + + if (ic != NULL) + { + if (!bitVectBitValue (ic->rMask, B_IDX) && !bitVectBitValue(ic->rMask, C_IDX)) + { + return PAIR_BC; } - if (pairId == PAIR_IY && abs(offset)<127) { - return; + else if (IS_Z80 && !bitVectBitValue (ic->rMask, D_IDX) && !bitVectBitValue(ic->rMask, E_IDX)) + { + return PAIR_DE; + } + else + { + *pisUsed = TRUE; + return PAIR_HL; } } - } - } - _G.pairs[pairId].last_type = left->type; - _G.pairs[pairId].lit = gc_strdup(l); - _G.pairs[pairId].offset = offset; - } - if (IS_GB && pairId == PAIR_DE && 0) { - if (_G.pairs[pairId].lit && !strcmp(_G.pairs[pairId].lit, l)) { - if (abs(_G.pairs[pairId].offset - offset) < 3) { - adjustPair(pair, &_G.pairs[pairId].offset, offset); - return; - } - } - _G.pairs[pairId].last_type = left->type; - _G.pairs[pairId].lit = gc_strdup(l); - _G.pairs[pairId].offset = offset; + else + { + *pisUsed = TRUE; + return PAIR_HL; } - /* Both a lit on the right and a true symbol on the left */ - if (offset) - emit2("ld %s,!hashedstr + %u", pair, l, offset); - else - emit2("ld %s,!hashedstr", pair, l); } -static void fetchPairLong(PAIR_ID pairId, asmop *aop, int offset) +static void +fetchPairLong (PAIR_ID pairId, asmop * aop, iCode *ic, int offset) { /* if this is remateriazable */ - if (isLitWord(aop)) { - fetchLitPair(pairId, aop, offset); - } - else { /* we need to get it byte by byte */ - if (pairId == PAIR_HL && IS_GB && requiresHL(aop)) { - aopGet(aop, offset, FALSE); - switch (aop->size) { - case 1: - emit2("ld l,!*hl"); - emit2("ld h,!immedbyte", 0); - break; - case 2: - emit2("!ldahli"); - emit2("ld h,!*hl"); - emit2("ld l,a"); - break; - default: - emit2("; WARNING: mlh woosed out. This code is invalid."); - } - } - else if (IS_Z80 && aop->type == AOP_IY) { - /* Instead of fetching relative to IY, just grab directly - from the address IY refers to */ - char *l = aopGetLitWordLong(aop, offset, FALSE); - wassert(l); - emit2("ld %s,(%s)", _pairs[pairId].name, l); - } - else { - emitcode("ld", "%s,%s", _pairs[pairId].l, aopGet(aop, offset, FALSE)); - emitcode("ld", "%s,%s", _pairs[pairId].h, aopGet(aop, offset+1, FALSE)); - } - /* PENDING: check? */ - if (pairId == PAIR_HL) - spillPair(PAIR_HL); + if (isLitWord (aop)) { + fetchLitPair (pairId, aop, offset); + } + else + { + if (getPairId (aop) == pairId) + { + /* Do nothing */ + } + /* we need to get it byte by byte */ + else if (pairId == PAIR_HL && IS_GB && requiresHL (aop)) { + aopGet (aop, offset, FALSE); + switch (aop->size - offset) { + case 1: + emit2 ("ld l,!*hl"); + emit2 ("ld h,!immedbyte", 0); + break; + case 2: + // PENDING: Requires that you are only fetching two bytes. + case 4: + emit2 ("!ldahli"); + emit2 ("ld h,!*hl"); + emit2 ("ld l,a"); + break; + default: + wassertl (0, "Attempted to fetch too much data into HL"); + break; + } + } + else if (IS_Z80 && aop->type == AOP_IY) { + /* Instead of fetching relative to IY, just grab directly + from the address IY refers to */ + char *l = aopGetLitWordLong (aop, offset, FALSE); + wassert (l); + emit2 ("ld %s,(%s)", _pairs[pairId].name, l); + + if (aop->size < 2) { + emit2("ld %s,!zero", _pairs[pairId].h); + } + } + else if (pairId == PAIR_IY) + { + if (isPair (aop)) + { + emit2 ("push %s", _pairs[getPairId(aop)].name); + emit2 ("pop iy"); + } + else + { + bool isUsed; + PAIR_ID id = makeFreePairId (ic, &isUsed); + if (isUsed) + _push (id); + /* Can't load into parts, so load into HL then exchange. */ + emit2 ("ld %s,%s", _pairs[id].l, aopGet (aop, offset, FALSE)); + emit2 ("ld %s,%s", _pairs[id].h, aopGet (aop, offset + 1, FALSE)); + emit2 ("push %s", _pairs[id].name); + emit2 ("pop iy"); + if (isUsed) + _pop (id); + } + } + else if (isUnsplitable(aop)) + { + emit2("push %s", _pairs[getPairId(aop)].name); + emit2("pop %s", _pairs[pairId].name); + } + else + { + emit2 ("ld %s,%s", _pairs[pairId].l, aopGet (aop, offset, FALSE)); + emit2 ("ld %s,%s", _pairs[pairId].h, aopGet (aop, offset + 1, FALSE)); + } + /* PENDING: check? */ + if (pairId == PAIR_HL) + spillPair (PAIR_HL); } } -static void fetchPair(PAIR_ID pairId, asmop *aop) +static void +fetchPair (PAIR_ID pairId, asmop * aop) { - fetchPairLong(pairId, aop, 0); + fetchPairLong (pairId, aop, NULL, 0); } -static void fetchHL(asmop *aop) +static void +fetchHL (asmop * aop) { - fetchPair(PAIR_HL, aop); + fetchPair (PAIR_HL, aop); } -static void setupPair(PAIR_ID pairId, asmop *aop, int offset) +static void +setupPairFromSP (PAIR_ID id, int offset) { - assert(pairId == PAIR_HL || pairId == PAIR_IY); + wassertl (id == PAIR_HL, "Setup relative to SP only implemented for HL"); + + if (_G.preserveCarry) + { + _push (PAIR_AF); + offset += 2; + } + + if (offset < INT8MIN || offset > INT8MAX) + { + emit2 ("ld hl,!immedword", offset); + emit2 ("add hl,sp"); + } + else + { + emit2 ("!ldahlsp", offset); + } + + if (_G.preserveCarry) + { + _pop (PAIR_AF); + offset -= 2; + } +} - switch (aop->type) { +static void +setupPair (PAIR_ID pairId, asmop * aop, int offset) +{ + switch (aop->type) + { case AOP_IY: - fetchLitPair(pairId, aop, 0); - break; + wassertl (pairId == PAIR_IY || pairId == PAIR_HL, "AOP_IY must be in IY or HL"); + fetchLitPair (pairId, aop, 0); + break; + case AOP_HL: - fetchLitPair(pairId, aop, offset); - _G.pairs[pairId].offset = offset; - break; - case AOP_STK: { - /* Doesnt include _G.stack.pushed */ - int abso = aop->aopu.aop_stk + offset + _G.stack.offset; - if (aop->aopu.aop_stk > 0) { - abso += _G.stack.param_offset; - } - assert(pairId == PAIR_HL); - /* In some cases we can still inc or dec hl */ - if (_G.pairs[pairId].last_type == AOP_STK && abs(_G.pairs[pairId].offset - abso) < 3) { - adjustPair(_pairs[pairId].name, &_G.pairs[pairId].offset, abso); - } - else { - emit2("!ldahlsp", abso +_G.stack.pushed); - } - _G.pairs[pairId].offset = abso; - break; - } + wassertl (pairId == PAIR_HL, "AOP_HL must be in HL"); + + fetchLitPair (pairId, aop, offset); + _G.pairs[pairId].offset = offset; + break; + + case AOP_EXSTK: + wassertl (IS_Z80, "Only the Z80 has an extended stack"); + wassertl (pairId == PAIR_IY || pairId == PAIR_HL, "The Z80 extended stack must be in IY or HL"); + + { + int offset = aop->aopu.aop_stk + _G.stack.offset; + + if (_G.pairs[pairId].last_type == aop->type && + _G.pairs[pairId].offset == offset) + { + /* Already setup */ + } + else + { + /* PENDING: Do this better. */ + if (_G.preserveCarry) + _push (PAIR_AF); + sprintf (buffer, "%d", offset + _G.stack.pushed); + emit2 ("ld %s,!hashedstr", _pairs[pairId].name, buffer); + emit2 ("add %s,sp", _pairs[pairId].name); + _G.pairs[pairId].last_type = aop->type; + _G.pairs[pairId].offset = offset; + if (_G.preserveCarry) + _pop (PAIR_AF); + } + } + break; + + case AOP_STK: + { + /* Doesnt include _G.stack.pushed */ + int abso = aop->aopu.aop_stk + offset + _G.stack.offset; + + if (aop->aopu.aop_stk > 0) + { + abso += _G.stack.param_offset; + } + assert (pairId == PAIR_HL); + /* In some cases we can still inc or dec hl */ + if (_G.pairs[pairId].last_type == AOP_STK && abs (_G.pairs[pairId].offset - abso) < 3) + { + adjustPair (_pairs[pairId].name, &_G.pairs[pairId].offset, abso); + } + else + { + setupPairFromSP (PAIR_HL, abso + _G.stack.pushed); + } + _G.pairs[pairId].offset = abso; + break; + } + + case AOP_PAIRPTR: + if (pairId != aop->aopu.aop_pairId) + genMovePairPair(aop->aopu.aop_pairId, pairId); + adjustPair (_pairs[pairId].name, &_G.pairs[pairId].offset, offset); + break; + default: - wassert(0); + wassert (0); } - _G.pairs[pairId].last_type = aop->type; + _G.pairs[pairId].last_type = aop->type; } -static void emitLabel(int key) +static void +emitLabel (int key) { - emit2("!tlabeldef", key); - spillCached(); + emit2 ("!tlabeldef", key); + spillCached (); } /*-----------------------------------------------------------------*/ /* aopGet - for fetching value of the aop */ /*-----------------------------------------------------------------*/ -static char *aopGet(asmop *aop, int offset, bool bit16) +static const char * +aopGet (asmop * aop, int offset, bool bit16) { - char *s = buffer ; - char *rs; + // char *s = buffer; + + /* offset is greater than size then zero */ + /* PENDING: this seems a bit screwed in some pointer cases. */ + if (offset > (aop->size - 1) && + aop->type != AOP_LIT) + { + tsprintf (buffer, sizeof(buffer), "!zero"); + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } - /* offset is greater than size then zero */ - /* PENDING: this seems a bit screwed in some pointer cases. */ - if (offset > (aop->size - 1) && - aop->type != AOP_LIT) - return zero; + /* depending on type */ + switch (aop->type) + { + case AOP_DUMMY: + tsprintf (buffer, sizeof(buffer), "!zero"); + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); - /* depending on type */ - switch (aop->type) { case AOP_IMMD: - /* PENDING: re-target */ - if (bit16) - tsprintf (s,"!immedwords", aop->aopu.aop_immd); - else - switch (offset) { - case 2: - tsprintf(s, "!bankimmeds", aop->aopu.aop_immd); - break; - case 1: - tsprintf(s, "!msbimmeds", aop->aopu.aop_immd); - break; - case 0: - tsprintf(s, "!lsbimmeds", aop->aopu.aop_immd); - break; - default: - wassert(0); - } - rs = Safe_calloc(1,strlen(s)+1); - strcpy(rs,s); - return rs; + /* PENDING: re-target */ + if (bit16) + tsprintf (buffer, sizeof(buffer), "!immedwords", aop->aopu.aop_immd); + else + switch (offset) + { + case 2: + tsprintf (buffer, sizeof(buffer), "!bankimmeds", aop->aopu.aop_immd); + break; + case 1: + tsprintf (buffer, sizeof(buffer), "!msbimmeds", aop->aopu.aop_immd); + break; + case 0: + tsprintf (buffer, sizeof(buffer), "!lsbimmeds", aop->aopu.aop_immd); + break; + default: + wassertl (0, "Fetching from beyond the limits of an immediate value."); + } + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); case AOP_DIR: - wassert(IS_GB); - emitcode("ld", "a,(%s+%d) ; x", aop->aopu.aop_dir, offset); - sprintf(s, "a"); - rs = Safe_calloc(1,strlen(s)+1); - strcpy(rs,s); - return rs; + wassert (IS_GB); + emit2 ("ld a,(%s+%d)", aop->aopu.aop_dir, offset); + SNPRINTF (buffer, sizeof(buffer), "a"); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); case AOP_SFR: - wassert(IS_GB); - emitcode("ldh", "a,(%s+%d) ; x", aop->aopu.aop_dir, offset); - sprintf(s, "a"); - rs = Safe_calloc(1,strlen(s)+1); - strcpy(rs,s); - return rs; + if( IS_GB ) + { + // wassert (IS_GB); + emit2 ("ldh a,(%s+%d)", aop->aopu.aop_dir, offset); + SNPRINTF (buffer, sizeof(buffer), "a"); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } + else + { /*.p.t.20030716 handling for i/o port read access for Z80 */ + if( aop->paged ) + { /* banked mode */ + /* reg A goes to address bits 15-8 during "in a,(x)" instruction */ + emit2( "ld a,!msbimmeds", aop->aopu.aop_dir); + emit2( "in a,(!lsbimmeds)", aop->aopu.aop_dir); + } + else if( z80_opts.port_mode == 180 ) + { /* z180 in0/out0 mode */ + emit2( "in0 a,(%s)", aop->aopu.aop_dir ); + } + else + { /* 8 bit mode */ + emit2( "in a,(%s)", aop->aopu.aop_dir ); + } + + SNPRINTF (buffer, sizeof(buffer), "a"); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } case AOP_REG: - return aop->aopu.aop_reg[offset]->name; + return aop->aopu.aop_reg[offset]->name; case AOP_HL: - wassert(IS_GB); - setupPair(PAIR_HL, aop, offset); - tsprintf(s, "!*hl"); - return gc_strdup(s); + wassert (IS_GB); + setupPair (PAIR_HL, aop, offset); + tsprintf (buffer, sizeof(buffer), "!*hl"); + + return traceAlloc(&_G.trace.aops, Safe_strdup (buffer)); case AOP_IY: - wassert(IS_Z80); - setupPair(PAIR_IY, aop, offset); - tsprintf(s,"!*iyx", offset); - rs = Safe_calloc(1,strlen(s)+1); - strcpy(rs,s); - return rs; + wassert (IS_Z80); + setupPair (PAIR_IY, aop, offset); + tsprintf (buffer, sizeof(buffer), "!*iyx", offset); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + + case AOP_EXSTK: + wassert (IS_Z80); + setupPair (PAIR_IY, aop, offset); + tsprintf (buffer, sizeof(buffer), "!*iyx", offset, offset); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); case AOP_STK: - if (IS_GB) { - setupPair(PAIR_HL, aop, offset); - tsprintf(s, "!*hl"); - } - else { - if (aop->aopu.aop_stk >= 0) - offset += _G.stack.param_offset; - tsprintf(s,"!*ixx ; x", aop->aopu.aop_stk+offset); - } - rs = Safe_calloc(1,strlen(s)+1); - strcpy(rs,s); - return rs; + if (IS_GB) + { + setupPair (PAIR_HL, aop, offset); + tsprintf (buffer, sizeof(buffer), "!*hl"); + } + else + { + if (aop->aopu.aop_stk >= 0) + offset += _G.stack.param_offset; + tsprintf (buffer, sizeof(buffer), + "!*ixx", aop->aopu.aop_stk + offset); + } + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); case AOP_CRY: - wassert(0); + wassertl (0, "Tried to fetch from a bit variable"); case AOP_ACC: - if (!offset) { - return "a"; - } - return "!zero"; + if (!offset) + { + return "a"; + } + else + { + tsprintf(buffer, sizeof(buffer), "!zero"); + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } case AOP_HLREG: - wassert(offset < 2); - return aop->aopu.aop_str[offset]; + wassert (offset < 2); + return aop->aopu.aop_str[offset]; case AOP_LIT: - return aopLiteral (aop->aopu.aop_lit,offset); + return aopLiteral (aop->aopu.aop_lit, offset); + + case AOP_SIMPLELIT: + { + unsigned long v = aop->aopu.aop_simplelit; + v >>= (offset * 8); + tsprintf (buffer, sizeof(buffer), + "!immedbyte", (unsigned int) v & 0xff); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + } case AOP_STR: - aop->coff = offset; - return aop->aopu.aop_str[offset]; + aop->coff = offset; + return aop->aopu.aop_str[offset]; + + case AOP_PAIRPTR: + setupPair (aop->aopu.aop_pairId, aop, offset); + if (aop->aopu.aop_pairId==PAIR_IX) + SNPRINTF (buffer, sizeof(buffer), + "!*ixx", 0); + else if (aop->aopu.aop_pairId==PAIR_IY) + SNPRINTF (buffer, sizeof(buffer), + "!*iyx", 0); + else + SNPRINTF (buffer, sizeof(buffer), + "(%s)", _pairs[aop->aopu.aop_pairId].name); + + return traceAlloc(&_G.trace.aops, Safe_strdup(buffer)); + default: - break; + break; } - wassertl(0, "aopget got unsupported aop->type"); - exit(0); + wassertl (0, "aopget got unsupported aop->type"); + exit (0); } -bool isRegString(const char *s) +bool +isRegString (const char *s) { - if (!strcmp(s, "b") || - !strcmp(s, "c") || - !strcmp(s, "d") || - !strcmp(s, "e") || - !strcmp(s, "a") || - !strcmp(s, "h") || - !strcmp(s, "l")) - return TRUE; - return FALSE; + if (!strcmp (s, "b") || + !strcmp (s, "c") || + !strcmp (s, "d") || + !strcmp (s, "e") || + !strcmp (s, "a") || + !strcmp (s, "h") || + !strcmp (s, "l")) + return TRUE; + return FALSE; } -bool isConstant(const char *s) +bool +isConstant (const char *s) { - /* This is a bit of a hack... */ - return (*s == '#' || *s == '$'); + /* This is a bit of a hack... */ + return (*s == '#' || *s == '$'); } -bool canAssignToPtr(const char *s) +bool +canAssignToPtr (const char *s) { - if (isRegString(s)) - return TRUE; - if (isConstant(s)) - return TRUE; - return FALSE; + if (isRegString (s)) + return TRUE; + if (isConstant (s)) + return TRUE; + return FALSE; } /*-----------------------------------------------------------------*/ /* aopPut - puts a string for a aop */ /*-----------------------------------------------------------------*/ -static void aopPut (asmop *aop, const char *s, int offset) +static void +aopPut (asmop * aop, const char *s, int offset) { - if (aop->size && offset > ( aop->size - 1)) { - werror(E_INTERNAL_ERROR,__FILE__,__LINE__, - "aopPut got offset > aop->size"); - exit(0); + char buffer2[256]; + + 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) { + // PENDING + tsprintf(buffer2, sizeof(buffer2), s); + s = buffer2; + + /* will assign value to value */ + /* depending on where it is ofcourse */ + switch (aop->type) + { + case AOP_DUMMY: + _moveA (s); /* in case s is volatile */ + break; + case AOP_DIR: - /* Direct. Hmmm. */ - wassert(IS_GB); - if (strcmp(s, "a")) - emitcode("ld", "a,%s", s); - emitcode("ld", "(%s+%d),a", aop->aopu.aop_dir, offset); - break; + /* Direct. Hmmm. */ + wassert (IS_GB); + if (strcmp (s, "a")) + emit2 ("ld a,%s", s); + emit2 ("ld (%s+%d),a", aop->aopu.aop_dir, offset); + break; case AOP_SFR: - wassert(IS_GB); - if (strcmp(s, "a")) - emitcode("ld", "a,%s", s); - emitcode("ldh", "(%s+%d),a", aop->aopu.aop_dir, offset); - break; + if( IS_GB ) + { + // wassert (IS_GB); + if (strcmp (s, "a")) + emit2 ("ld a,%s", s); + emit2 ("ldh (%s+%d),a", aop->aopu.aop_dir, offset); + } + else + { /*.p.t.20030716 handling for i/o port read access for Z80 */ + if (aop->paged) + { /* banked mode */ + if (aop->bcInUse) + emit2( "push bc" ); + + if (strlen(s) != 1 + || (s[0] != 'a' && s[0] != 'd' && s[0] != 'e' + && s[0] != 'h' && s[0] != 'l')) + { + emit2( "ld a,%s", s ); + s = "a"; + } + + emit2( "ld bc,#%s", aop->aopu.aop_dir ); + emit2( "out (c),%s", s ); + + if( aop->bcInUse ) + emit2( "pop bc" ); + else + spillPair (PAIR_BC); + } + else if( z80_opts.port_mode == 180 ) + { /* z180 in0/out0 mode */ + emit2( "ld a,%s", s ); + emit2( "out0 (%s),a", aop->aopu.aop_dir ); + } + else + { /* 8 bit mode */ + emit2( "ld a,%s", s ); + emit2( "out (%s),a", aop->aopu.aop_dir ); + } + } + break; case AOP_REG: - if (!strcmp(s, "!*hl")) - emit2("ld %s,!*hl", aop->aopu.aop_reg[offset]->name); - else - emit2("ld %s,%s", - aop->aopu.aop_reg[offset]->name, s); - break; + if (!strcmp (s, "!*hl")) + emit2 ("ld %s,!*hl", aop->aopu.aop_reg[offset]->name); + else + emit2 ("ld %s,%s", + aop->aopu.aop_reg[offset]->name, s); + spillPairReg(aop->aopu.aop_reg[offset]->name); + break; case AOP_IY: - wassert(!IS_GB); - setupPair(PAIR_IY, aop, offset); - if (!canAssignToPtr(s)) { - emit2("ld a,%s", s); - emit2("ld !*iyx,a", offset); - } - else - emit2("ld !*iyx,%s", offset, s); - break; + wassert (!IS_GB); + if (!canAssignToPtr (s)) + { + emit2 ("ld a,%s", s); + setupPair (PAIR_IY, aop, offset); + emit2 ("ld !*iyx,a", offset); + } + else + { + setupPair (PAIR_IY, aop, offset); + emit2 ("ld !*iyx,%s", offset, s); + } + break; case AOP_HL: - wassert(IS_GB); - /* PENDING: for re-target */ - if (!strcmp(s, "!*hl") || !strcmp(s, "(hl)") || !strcmp(s, "[hl]")) { - emit2("ld a,!*hl"); - s = "a"; - } - setupPair(PAIR_HL, aop, offset); + wassert (IS_GB); + /* PENDING: for re-target */ + if (!strcmp (s, "!*hl") || !strcmp (s, "(hl)") || !strcmp (s, "[hl]")) + { + emit2 ("ld a,!*hl"); + s = "a"; + } + setupPair (PAIR_HL, aop, offset); - emit2("ld !*hl,%s", s); - break; + emit2 ("ld !*hl,%s", s); + break; - case AOP_STK: - if (IS_GB) { - /* PENDING: re-target */ - if (!strcmp(s, "!*hl") || !strcmp(s, "(hl)") || !strcmp(s, "[hl]")) { - emit2("ld a,!*hl"); - s = "a"; - } - setupPair(PAIR_HL, aop, offset); - if (!canAssignToPtr(s)) { - emit2("ld a,%s", s); - emit2("ld !*hl,a"); - } + case AOP_EXSTK: + wassert (!IS_GB); + if (!canAssignToPtr (s)) + { + emit2 ("ld a,%s", s); + setupPair (PAIR_IY, aop, offset); + emit2 ("ld !*iyx,a", offset); + } else - emit2("ld !*hl,%s", s); - } - else { - if (aop->aopu.aop_stk >= 0) - offset += _G.stack.param_offset; - if (!canAssignToPtr(s)) { - emit2("ld a,%s", s); - emit2("ld !*ixx,a", aop->aopu.aop_stk+offset); - } + { + setupPair (PAIR_IY, aop, offset); + emit2 ("ld !*iyx,%s", offset, s); + } + break; + + case AOP_STK: + if (IS_GB) + { + /* PENDING: re-target */ + if (!strcmp (s, "!*hl") || !strcmp (s, "(hl)") || !strcmp (s, "[hl]")) + { + emit2 ("ld a,!*hl"); + s = "a"; + } + setupPair (PAIR_HL, aop, offset); + if (!canAssignToPtr (s)) + { + emit2 ("ld a,%s", s); + emit2 ("ld !*hl,a"); + } + else + emit2 ("ld !*hl,%s", s); + } else - emit2("ld !*ixx,%s", aop->aopu.aop_stk+offset, s); - } - break; + { + if (aop->aopu.aop_stk >= 0) + offset += _G.stack.param_offset; + if (!canAssignToPtr (s)) + { + emit2 ("ld a,%s", s); + emit2 ("ld !*ixx,a", aop->aopu.aop_stk + offset); + } + else + { + emit2 ("ld !*ixx,%s", aop->aopu.aop_stk + offset, s); + } + } + break; case AOP_CRY: - /* if bit variable */ - if (!aop->aopu.aop_dir) { - emit2("ld a,#0"); - emit2("rla"); - } else { - /* In bit space but not in C - cant happen */ - wassert(0); - } - break; + /* if bit variable */ + if (!aop->aopu.aop_dir) + { + emit2 ("ld a,!zero"); + emit2 ("rla"); + } + else + { + /* In bit space but not in C - cant happen */ + wassertl (0, "Tried to write into a bit variable"); + } + break; case AOP_STR: - aop->coff = offset; - if (strcmp(aop->aopu.aop_str[offset],s)) { - emitcode ("ld","%s,%s",aop->aopu.aop_str[offset],s); - } - break; + aop->coff = offset; + if (strcmp (aop->aopu.aop_str[offset], s)) + { + emit2 ("ld %s,%s", aop->aopu.aop_str[offset], s); + } + spillPairReg(aop->aopu.aop_str[offset]); + break; case AOP_ACC: - aop->coff = offset; - if (!offset && (strcmp(s,"acc") == 0)) + aop->coff = offset; + if (!offset && (strcmp (s, "acc") == 0)) + break; + if (offset > 0) + { + wassertl (0, "Tried to access past the end of A"); + } + else + { + if (strcmp (aop->aopu.aop_str[offset], s)) + { + emit2 ("ld %s,%s", aop->aopu.aop_str[offset], s); + spillPairReg(aop->aopu.aop_str[offset]); + } + } break; - if (offset>0) { - - emitcode("", "; Error aopPut AOP_ACC"); - } - else { - if (strcmp(aop->aopu.aop_str[offset],s)) - emitcode ("ld","%s,%s",aop->aopu.aop_str[offset],s); - } - break; case AOP_HLREG: - wassert(offset < 2); - emit2("ld %s,%s", aop->aopu.aop_str[offset], s); - break; + wassert (offset < 2); + emit2 ("ld %s,%s", aop->aopu.aop_str[offset], s); + spillPairReg(aop->aopu.aop_str[offset]); + break; + + case AOP_PAIRPTR: + setupPair (aop->aopu.aop_pairId, aop, offset); + if (aop->aopu.aop_pairId==PAIR_IX) + emit2 ("ld !*ixx,%s", 0, s); + else if (aop->aopu.aop_pairId==PAIR_IY) + emit2 ("ld !*iyx,%s", 0, s); + else + emit2 ("ld (%s),%s", _pairs[aop->aopu.aop_pairId].name, s); + break; - default : - werror(E_INTERNAL_ERROR,__FILE__,__LINE__, - "aopPut got unsupported aop->type"); - exit(0); + default: + werror (E_INTERNAL_ERROR, __FILE__, __LINE__, + "aopPut got unsupported aop->type"); + exit (0); } } #define AOP(op) op->aop #define AOP_TYPE(op) AOP(op)->type #define AOP_SIZE(op) AOP(op)->size -#define AOP_NEEDSACC(x) (AOP(x) && (AOP_TYPE(x) == AOP_CRY)) +#define AOP_NEEDSACC(x) (AOP(x) && ((AOP_TYPE(x) == AOP_CRY) || (AOP_TYPE(x) == AOP_SFR))) -static void commitPair(asmop *aop, PAIR_ID id) +static void +commitPair (asmop * aop, PAIR_ID id) { - if (id == PAIR_HL && requiresHL(aop)) { - emit2("ld a,l"); - emit2("ld d,h"); - aopPut(aop, "a", 0); - aopPut(aop, "d", 1); + /* PENDING: Verify this. */ + if (id == PAIR_HL && requiresHL (aop) && IS_GB) + { + emit2 ("ld a,l"); + emit2 ("ld d,h"); + aopPut (aop, "a", 0); + aopPut (aop, "d", 1); } - else { - aopPut(aop, _pairs[id].l, 0); - aopPut(aop, _pairs[id].h, 1); + else + { + /* Special cases */ + if (id == PAIR_HL && aop->type == AOP_IY && aop->size == 2) + { + char *l = aopGetLitWordLong (aop, 0, FALSE); + wassert (l); + + emit2 ("ld (%s),%s", l, _pairs[id].name); + } + else + { + aopPut (aop, _pairs[id].l, 0); + aopPut (aop, _pairs[id].h, 1); + } } } /*-----------------------------------------------------------------*/ /* getDataSize - get the operand data size */ /*-----------------------------------------------------------------*/ -int getDataSize(operand *op) +int +getDataSize (operand * op) { - int size; - size = AOP_SIZE(op); - if(size == 3) { - /* pointer */ - wassert(0); + int size; + size = AOP_SIZE (op); + if (size == 3) + { + /* pointer */ + wassertl (0, "Somehow got a three byte data pointer"); } - return size; + return size; } /*-----------------------------------------------------------------*/ /* movLeft2Result - move byte from left to result */ /*-----------------------------------------------------------------*/ -static void movLeft2Result (operand *left, int offl, - operand *result, int offr, int sign) +static void +movLeft2Result (operand * left, int offl, + operand * result, int offr, int sign) { - char *l; - if(!sameRegs(AOP(left),AOP(result)) || (offl != offr)){ - l = aopGet(AOP(left),offl,FALSE); + const char *l; - if (!sign) { - aopPut(AOP(result),l,offr); - } - else { - wassert(0); + if (!sameRegs (AOP (left), AOP (result)) || (offl != offr)) + { + l = aopGet (AOP (left), offl, FALSE); + + if (!sign) + { + aopPut (AOP (result), l, offr); + } + else + { + if (getDataSize (left) == offl + 1) + { + emit2 ("ld a,%s", l); + aopPut (AOP (result), "a", offr); + } } } } +static void +movLeft2ResultLong (operand * left, int offl, + operand * result, int offr, int sign, + int size) +{ + if (size == 1) + { + movLeft2Result (left, offl, result, offr, sign); + } + else + { + wassertl (offl == 0 && offr == 0, "Only implemented for zero offset"); + wassertl (size == 2, "Only implemented for two bytes or one"); + + if ( IS_GB && requiresHL ( AOP (left)) && getPairId ( AOP (result)) == PAIR_HL) + { + emit2 ("ld a,%s", aopGet (AOP (left), LSB, FALSE)); + emit2 ("ld h,%s", aopGet (AOP (left), MSB16, FALSE)); + emit2 ("ld l,a"); + spillPair (PAIR_HL); + } + else if ( getPairId ( AOP (result)) == PAIR_IY) + { + PAIR_ID id = getPairId (AOP (left)); + if (id != PAIR_INVALID) + { + emit2("push %s", _pairs[id].name); + emit2("pop iy"); + } + else + { + /* PENDING */ + emitDebug("Error"); + } + } + else + { + movLeft2Result (left, offl, result, offr, sign); + movLeft2Result (left, offl+1, result, offr+1, sign); + } + } +} /** Put Acc into a register set */ -void outAcc(operand *result) +void +outAcc (operand * result) { - int size, offset; - size = getDataSize(result); - if (size){ - aopPut(AOP(result),"a",0); - size--; - offset = 1; - /* unsigned or positive */ - while (size--){ - aopPut(AOP(result), zero, offset++); + int size, offset; + size = getDataSize (result); + if (size) + { + aopPut (AOP (result), "a", 0); + size--; + offset = 1; + /* unsigned or positive */ + while (size--) + { + aopPut (AOP (result), "!zero", offset++); } } } /** Take the value in carry and put it into a register */ -void outBitCLong(operand *result, bool swap_sense) +void +outBitCLong (operand * result, bool swap_sense) { - /* if the result is bit */ - if (AOP_TYPE(result) == AOP_CRY) { - emitcode("", "; Note: outBitC form 1"); - aopPut(AOP(result),"blah",0); + /* if the result is bit */ + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Tried to write carry to a bit"); } - else { - emit2("ld a,!zero"); - emit2("rla"); - if (swap_sense) - emit2("xor a,!immedbyte", 1); - outAcc(result); + else + { + emit2 ("ld a,!zero"); + emit2 ("rla"); + if (swap_sense) + emit2 ("xor a,!immedbyte", 1); + outAcc (result); } } -void outBitC(operand *result) +void +outBitC (operand * result) { - outBitCLong(result, FALSE); + outBitCLong (result, FALSE); } /*-----------------------------------------------------------------*/ /* toBoolean - emit code for orl a,operator(sizeop) */ /*-----------------------------------------------------------------*/ -void toBoolean(operand *oper) +void +_toBoolean (operand * oper) { - int size = AOP_SIZE(oper); - int offset = 0; - if (size>1) { - emitcode("ld", "a,%s", aopGet(AOP(oper), offset++, FALSE)); - size--; - while (size--) - emitcode("or","a,%s",aopGet(AOP(oper),offset++,FALSE)); + int size = AOP_SIZE (oper); + int offset = 0; + if (size > 1) + { + emit2 ("ld a,%s", aopGet (AOP (oper), offset++, FALSE)); + size--; + while (size--) + emit2 ("or a,%s", aopGet (AOP (oper), offset++, FALSE)); } - else { - if (AOP(oper)->type != AOP_ACC) { - CLRC; - emitcode("or","a,%s",aopGet(AOP(oper),0,FALSE)); - } + else + { + if (AOP (oper)->type != AOP_ACC) + { + _clearCarry(); + emit2 ("or a,%s", aopGet (AOP (oper), 0, FALSE)); + } } } + /*-----------------------------------------------------------------*/ /* genNot - generate code for ! operation */ /*-----------------------------------------------------------------*/ -static void genNot (iCode *ic) +static void +genNot (iCode * ic) { - sym_link *optype = operandType(IC_LEFT(ic)); - /* assign asmOps to operand & result */ - aopOp (IC_LEFT(ic),ic,FALSE, TRUE); - aopOp (IC_RESULT(ic),ic,TRUE, FALSE); - - /* if in bit space then a special case */ - if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY) { - wassert(0); - } + /* assign asmOps to operand & result */ + aopOp (IC_LEFT (ic), ic, FALSE, TRUE); + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); - /* if type float then do float */ - if (IS_FLOAT(optype)) { - wassert(0); + /* if in bit space then a special case */ + if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY) + { + wassertl (0, "Tried to negate a bit"); } - toBoolean(IC_LEFT(ic)); + _toBoolean (IC_LEFT (ic)); - /* Not of A: - If A == 0, !A = 1 - else A = 0 - So if A = 0, A-1 = 0xFF and C is set, rotate C into reg. */ - emit2("sub a,!one"); - outBitC(IC_RESULT(ic)); + /* Not of A: + If A == 0, !A = 1 + else A = 0 + So if A = 0, A-1 = 0xFF and C is set, rotate C into reg. */ + emit2 ("sub a,!one"); + outBitC (IC_RESULT (ic)); - /* release the aops */ - freeAsmop(IC_LEFT(ic),NULL,ic); - freeAsmop(IC_RESULT(ic),NULL,ic); + /* release the aops */ + freeAsmop (IC_LEFT (ic), NULL, ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ /* genCpl - generate code for complement */ /*-----------------------------------------------------------------*/ -static void genCpl (iCode *ic) +static void +genCpl (iCode * ic) { - int offset = 0; - int size ; + int offset = 0; + int size; - /* assign asmOps to operand & result */ - aopOp (IC_LEFT(ic),ic,FALSE, FALSE); - aopOp (IC_RESULT(ic),ic,TRUE, FALSE); + /* assign asmOps to operand & result */ + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); - /* if both are in bit space then - a special case */ - if (AOP_TYPE(IC_RESULT(ic)) == AOP_CRY && - AOP_TYPE(IC_LEFT(ic)) == AOP_CRY ) { - wassert(0); + /* if both are in bit space then + a special case */ + if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY && + AOP_TYPE (IC_LEFT (ic)) == AOP_CRY) + { + wassertl (0, "Left and the result are in bit space"); } - size = AOP_SIZE(IC_RESULT(ic)); - while (size--) { - char *l = aopGet(AOP(IC_LEFT(ic)),offset,FALSE); - MOVA(l); - emitcode("cpl",""); - aopPut(AOP(IC_RESULT(ic)),"a",offset++); + size = AOP_SIZE (IC_RESULT (ic)); + while (size--) + { + const char *l = aopGet (AOP (IC_LEFT (ic)), offset, FALSE); + _moveA (l); + emit2("cpl"); + aopPut (AOP (IC_RESULT (ic)), "a", offset++); } - /* release the aops */ - freeAsmop(IC_LEFT(ic),NULL,ic); - freeAsmop(IC_RESULT(ic),NULL,ic); + /* release the aops */ + freeAsmop (IC_LEFT (ic), NULL, ic); + freeAsmop (IC_RESULT (ic), NULL, ic); +} + +static void +_gbz80_emitAddSubLongLong (iCode *ic, asmop *left, asmop *right, bool isAdd) +{ + /* Logic: + ld de,right.lw + setup hl to left + de = hl - de + push flags + store de into result + pop flags + ld de,right.hw + setup hl + de = hl -de + store de into result + */ + const char *first = isAdd ? "add" : "sub"; + const char *later = isAdd ? "adc" : "sbc"; + + wassertl (IS_GB, "Code is only relevent to the gbz80"); + wassertl (AOP( IC_RESULT (ic))->size == 4, "Only works for four bytes"); + + fetchPair (PAIR_DE, left); + + emit2 ("ld a,e"); + emit2 ("%s a,%s", first, aopGet( right, LSB, FALSE)); + emit2 ("ld e,a"); + emit2 ("ld a,d"); + emit2 ("%s a,%s", later, aopGet( right, MSB16, FALSE)); + + _push (PAIR_AF); + aopPut ( AOP (IC_RESULT (ic)), "a", MSB16); + aopPut ( AOP (IC_RESULT (ic)), "e", LSB); + + fetchPairLong (PAIR_DE, left, NULL, MSB24); + aopGet (right, MSB24, FALSE); + + _pop (PAIR_AF); + emit2 ("ld a,e"); + emit2 ("%s a,%s", later, aopGet( right, MSB24, FALSE)); + emit2 ("ld e,a"); + emit2 ("ld a,d"); + emit2 ("%s a,%s", later, aopGet( right, MSB32, FALSE)); + + aopPut ( AOP (IC_RESULT (ic)), "a", MSB32); + aopPut ( AOP (IC_RESULT (ic)), "e", MSB24); +} + +static void +_gbz80_emitAddSubLong (iCode *ic, bool isAdd) +{ + _gbz80_emitAddSubLongLong (ic, AOP (IC_LEFT (ic)), AOP (IC_RIGHT (ic)), isAdd); } /*-----------------------------------------------------------------*/ -/* genUminus - unary minus code generation */ +/* genUminusFloat - unary minus for floating points */ /*-----------------------------------------------------------------*/ -static void genUminus (iCode *ic) +static void +genUminusFloat (operand * op, operand * result) { - int offset ,size ; - sym_link *optype, *rtype; + int size, offset = 0; - /* assign asmops */ - aopOp(IC_LEFT(ic),ic,FALSE, FALSE); - aopOp(IC_RESULT(ic),ic,TRUE, FALSE); + emitDebug("; genUminusFloat"); - /* if both in bit space then special - case */ - if (AOP_TYPE(IC_RESULT(ic)) == AOP_CRY && - AOP_TYPE(IC_LEFT(ic)) == AOP_CRY ) { - wassert(0); - goto release; + /* for this we just need to flip the + first bit then copy the rest in place */ + size = AOP_SIZE (op) - 1; + + _moveA(aopGet (AOP (op), MSB32, FALSE)); + + emit2("xor a,!immedbyte", 0x80); + aopPut (AOP (result), "a", MSB32); + + while (size--) + { + aopPut (AOP (result), aopGet (AOP (op), offset, FALSE), offset); + offset++; } +} + +/*-----------------------------------------------------------------*/ +/* genUminus - unary minus code generation */ +/*-----------------------------------------------------------------*/ +static void +genUminus (iCode * ic) +{ + int offset, size; + sym_link *optype, *rtype; - optype = operandType(IC_LEFT(ic)); - rtype = operandType(IC_RESULT(ic)); + /* assign asmops */ + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); - /* if float then do float stuff */ - if (IS_FLOAT(optype)) { - wassert(0); - goto release; + /* if both in bit space then special + case */ + if (AOP_TYPE (IC_RESULT (ic)) == AOP_CRY && + AOP_TYPE (IC_LEFT (ic)) == AOP_CRY) + { + wassertl (0, "Left and right are in bit space"); + goto release; } - /* otherwise subtract from zero */ - size = AOP_SIZE(IC_LEFT(ic)); - offset = 0 ; - CLRC ; - while(size--) { - char *l = aopGet(AOP(IC_LEFT(ic)),offset,FALSE); - emit2("ld a,!zero"); - emit2("sbc a,%s",l); - aopPut(AOP(IC_RESULT(ic)),"a",offset++); + 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; } - /* 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))))) { - emit2("rlc a"); - emit2("sbc a,a"); - while (size--) - aopPut(AOP(IC_RESULT(ic)),"a",offset++); + /* otherwise subtract from zero */ + size = AOP_SIZE (IC_LEFT (ic)); + + if (AOP_SIZE (IC_RESULT (ic)) == 4 && IS_GB) + { + /* Create a new asmop with value zero */ + asmop *azero = newAsmop (AOP_SIMPLELIT); + azero->aopu.aop_simplelit = 0; + azero->size = size; + _gbz80_emitAddSubLongLong (ic, azero, AOP (IC_LEFT (ic)), FALSE); + goto release; } -release: - /* release the aops */ - freeAsmop(IC_LEFT(ic),NULL,ic); - freeAsmop(IC_RESULT(ic),NULL,ic); -} + offset = 0; + _clearCarry(); + while (size--) + { + const char *l = aopGet (AOP (IC_LEFT (ic)), offset, FALSE); + emit2 ("ld a,!zero"); + emit2 ("sbc a,%s", l); + aopPut (AOP (IC_RESULT (ic)), "a", offset++); + } -static void _push(PAIR_ID pairId) -{ - emit2("push %s", _pairs[pairId].name); - _G.stack.pushed += 2; -} + /* 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))))) + { + emit2 ("rlc a"); + emit2 ("sbc a,a"); + while (size--) + aopPut (AOP (IC_RESULT (ic)), "a", offset++); + } -static void _pop(PAIR_ID pairId) -{ - emit2("pop %s", _pairs[pairId].name); - _G.stack.pushed -= 2; +release: + /* release the aops */ + freeAsmop (IC_LEFT (ic), NULL, ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } - /*-----------------------------------------------------------------*/ /* assignResultValue - */ /*-----------------------------------------------------------------*/ -void assignResultValue(operand * oper) +void +assignResultValue (operand * oper) { - int size = AOP_SIZE(oper); - bool topInA = 0; + int size = AOP_SIZE (oper); + bool topInA = 0; - wassert(size <= 4); - topInA = requiresHL(AOP(oper)); + wassertl (size <= 4, "Got a result that is bigger than four bytes"); + topInA = requiresHL (AOP (oper)); -#if 0 - if (!IS_GB) - wassert(size <= 2); -#endif - if (IS_GB && size == 4 && requiresHL(AOP(oper))) { - /* We do it the hard way here. */ - _push(PAIR_HL); - aopPut(AOP(oper), _fReturn[0], 0); - aopPut(AOP(oper), _fReturn[1], 1); - emitcode("pop", "de"); - _G.stack.pushed -= 2; - aopPut(AOP(oper), _fReturn[0], 2); - aopPut(AOP(oper), _fReturn[1], 3); + if (IS_GB && size == 4 && requiresHL (AOP (oper))) + { + /* We do it the hard way here. */ + _push (PAIR_HL); + aopPut (AOP (oper), _fReturn[0], 0); + aopPut (AOP (oper), _fReturn[1], 1); + _pop (PAIR_DE); + aopPut (AOP (oper), _fReturn[0], 2); + aopPut (AOP (oper), _fReturn[1], 3); } - else { - while (size--) { - aopPut(AOP(oper), _fReturn[size], size); - } + else + { + while (size--) + { + aopPut (AOP (oper), _fReturn[size], size); + } } } -/*-----------------------------------------------------------------*/ -/* genIpush - genrate code for pushing this gets a little complex */ -/*-----------------------------------------------------------------*/ -static void genIpush (iCode *ic) +/** Simple restore that doesn't take into account what is used in the + return. +*/ +static void +_restoreRegsAfterCall(void) { - int size, offset = 0 ; - char *l; - - /* if this is not a parm push : ie. it is spill push - and spill push is always done on the local stack */ - if (!ic->parmPush) { - /* and the item is spilt then do nothing */ - if (OP_SYMBOL(IC_LEFT(ic))->isspilt) - return ; + if (_G.stack.pushedDE) + { + _pop ( PAIR_DE); + _G.stack.pushedDE = FALSE; + } + if (_G.stack.pushedBC) + { + _pop ( PAIR_BC); + _G.stack.pushedBC = FALSE; + } + _G.saves.saved = FALSE; +} - aopOp(IC_LEFT(ic),ic,FALSE, FALSE); - size = AOP_SIZE(IC_LEFT(ic)); - /* push it on the stack */ - if (isPair(AOP(IC_LEFT(ic)))) { - emitcode("push", getPairName(AOP(IC_LEFT(ic)))); - _G.stack.pushed += 2; +static void +_saveRegsForCall(iCode *ic, int sendSetSize) +{ + /* Rules: + o Stack parameters are pushed before this function enters + o DE and BC may be used in this function. + o HL and DE may be used to return the result. + o HL and DE may be used to send variables. + o DE and BC may be used to store the result value. + o HL may be used in computing the sent value of DE + o The iPushes for other parameters occur before any addSets + + Logic: (to be run inside the first iPush or if none, before sending) + o Compute if DE and/or BC are in use over the call + o Compute if DE is used in the send set + o Compute if DE and/or BC are used to hold the result value + o If (DE is used, or in the send set) and is not used in the result, push. + o If BC is used and is not in the result, push + o + o If DE is used in the send set, fetch + o If HL is used in the send set, fetch + o Call + o ... + */ + if (_G.saves.saved == FALSE) { + bool deInUse, bcInUse; + bool deSending; + bool bcInRet = FALSE, deInRet = FALSE; + bitVect *rInUse; + + rInUse = bitVectCplAnd (bitVectCopy (ic->rMask), + z80_rUmaskForOp (IC_RESULT(ic))); + + deInUse = bitVectBitValue (rInUse, D_IDX) || bitVectBitValue(rInUse, E_IDX); + bcInUse = bitVectBitValue (rInUse, B_IDX) || bitVectBitValue(rInUse, C_IDX); + + deSending = (sendSetSize > 1); + + emitDebug ("; _saveRegsForCall: sendSetSize: %u deInUse: %u bcInUse: %u deSending: %u", sendSetSize, deInUse, bcInUse, deSending); + + if (bcInUse && bcInRet == FALSE) { + _push(PAIR_BC); + _G.stack.pushedBC = TRUE; + } + if (deInUse && deInRet == FALSE) { + _push(PAIR_DE); + _G.stack.pushedDE = TRUE; + } + + _G.saves.saved = TRUE; } else { - offset = size; - while (size--) { - /* Simple for now - load into A and PUSH AF */ - if (AOP(IC_LEFT(ic))->type == AOP_IY) { - char *l = aopGetLitWordLong(AOP(IC_LEFT(ic)), --offset, FALSE); - wassert(l); - emit2("ld a,(%s)", l); - } - else { - l = aopGet(AOP(IC_LEFT(ic)), --offset, FALSE); - emit2("ld a,%s", l); - } - emit2("push af"); - emit2("inc sp"); - _G.stack.pushed++; - } + /* Already saved. */ } - return ; - } +} - /* Hmmm... what about saving the currently used registers - at this point? */ +/*-----------------------------------------------------------------*/ +/* genIpush - genrate code for pushing this gets a little complex */ +/*-----------------------------------------------------------------*/ +static void +genIpush (iCode * ic) +{ + int size, offset = 0; + const char *l; - /* then do the push */ - aopOp(IC_LEFT(ic),ic,FALSE, FALSE); + /* if this is not a parm push : ie. it is spill push + and spill push is always done on the local stack */ + if (!ic->parmPush) + { + wassertl(0, "Encountered an unsupported spill push."); + return; + } - size = AOP_SIZE(IC_LEFT(ic)); + if (_G.saves.saved == FALSE) { + /* Caller saves, and this is the first iPush. */ + /* Scan ahead until we find the function that we are pushing parameters to. + Count the number of addSets on the way to figure out what registers + are used in the send set. + */ + int nAddSets = 0; + iCode *walk = ic->next; - if (isPair(AOP(IC_LEFT(ic)))) { - _G.stack.pushed+=2; - emitcode("push", "%s", getPairName(AOP(IC_LEFT(ic)))); - } - else { - if (size == 2) { - fetchHL(AOP(IC_LEFT(ic))); - emitcode("push", "hl"); - spillPair(PAIR_HL); - _G.stack.pushed += 2; - goto release; - } - if (size == 4) { - fetchPairLong(PAIR_HL, AOP(IC_LEFT(ic)), 2); - emitcode("push", "hl"); - spillPair(PAIR_HL); - _G.stack.pushed += 2; - fetchPairLong(PAIR_HL, AOP(IC_LEFT(ic)), 0); - emitcode("push", "hl"); - spillPair(PAIR_HL); - _G.stack.pushed += 2; - goto release; - } - offset = size; - while (size--) { - if (AOP(IC_LEFT(ic))->type == AOP_IY) { - char *l = aopGetLitWordLong(AOP(IC_LEFT(ic)), --offset, FALSE); - wassert(l); - emit2("ld a,(%s)", l); + while (walk) { + if (walk->op == SEND) { + nAddSets++; + } + else if (walk->op == CALL || walk->op == PCALL) { + /* Found it. */ + break; } else { - l = aopGet(AOP(IC_LEFT(ic)), --offset, FALSE); - emit2("ld a,%s", l); + /* Keep looking. */ } - emitcode("push", "af"); - emitcode("inc", "sp"); - _G.stack.pushed++; + walk = walk->next; + } + _saveRegsForCall(walk, nAddSets); } + else { + /* Already saved by another iPush. */ + } + + /* then do the push */ + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + + size = AOP_SIZE (IC_LEFT (ic)); + + if (isPair (AOP (IC_LEFT (ic))) && size == 2) + { + _G.stack.pushed += 2; + emit2 ("push %s", getPairName (AOP (IC_LEFT (ic)))); + } + else + { + if (size == 2) + { + fetchHL (AOP (IC_LEFT (ic))); + emit2 ("push hl"); + spillPair (PAIR_HL); + _G.stack.pushed += 2; + goto release; + } + if (size == 4) + { + fetchPairLong (PAIR_HL, AOP (IC_LEFT (ic)), ic, 2); + emit2 ("push hl"); + spillPair (PAIR_HL); + _G.stack.pushed += 2; + fetchPairLong (PAIR_HL, AOP (IC_LEFT (ic)), ic, 0); + emit2 ("push hl"); + spillPair (PAIR_HL); + _G.stack.pushed += 2; + goto release; + } + offset = size; + while (size--) + { + if (AOP (IC_LEFT (ic))->type == AOP_IY) + { + char *l = aopGetLitWordLong (AOP (IC_LEFT (ic)), --offset, FALSE); + wassert (l); + emit2 ("ld a,(%s)", l); + } + else + { + l = aopGet (AOP (IC_LEFT (ic)), --offset, FALSE); + emit2 ("ld a,%s", l); + } + emit2 ("push af"); + emit2 ("inc sp"); + _G.stack.pushed++; + } } - release: - freeAsmop(IC_LEFT(ic),NULL,ic); +release: + freeAsmop (IC_LEFT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ /* genIpop - recover the registers: can happen only for spilling */ /*-----------------------------------------------------------------*/ -static void genIpop (iCode *ic) +static void +genIpop (iCode * ic) { - int size,offset ; + int size, offset; - /* if the temp was not pushed then */ - if (OP_SYMBOL(IC_LEFT(ic))->isspilt) - return ; + /* if the temp was not pushed then */ + if (OP_SYMBOL (IC_LEFT (ic))->isspilt) + return; - aopOp(IC_LEFT(ic),ic,FALSE, FALSE); - size = AOP_SIZE(IC_LEFT(ic)); - offset = (size-1); - if (isPair(AOP(IC_LEFT(ic)))) { - emitcode("pop", getPairName(AOP(IC_LEFT(ic)))); + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + size = AOP_SIZE (IC_LEFT (ic)); + offset = (size - 1); + if (isPair (AOP (IC_LEFT (ic)))) + { + emit2 ("pop %s", getPairName (AOP (IC_LEFT (ic)))); } - else { - while (size--) { - emitcode("dec", "sp"); - emitcode("pop", "hl"); - spillPair(PAIR_HL); - aopPut(AOP(IC_LEFT(ic)), "l", offset--); - } + else + { + while (size--) + { + emit2 ("dec sp"); + emit2 ("pop hl"); + spillPair (PAIR_HL); + aopPut (AOP (IC_LEFT (ic)), "l", offset--); + } } - freeAsmop(IC_LEFT(ic),NULL,ic); + freeAsmop (IC_LEFT (ic), NULL, ic); } -static int _isPairUsed(iCode *ic, PAIR_ID pairId) +/* This is quite unfortunate */ +static void +setArea (int inHome) { - int ret = 0; - switch (pairId) { - case PAIR_DE: - if (bitVectBitValue(ic->rUsed, D_IDX)) - ret++; - if (bitVectBitValue(ic->rUsed, E_IDX)) - ret++; - break; - default: - wassert(0); - } - return ret; + /* + static int lastArea = 0; + + if (_G.in_home != inHome) { + if (inHome) { + const char *sz = port->mem.code_name; + port->mem.code_name = "HOME"; + emit2("!area", CODE_NAME); + port->mem.code_name = sz; + } + else + emit2("!area", CODE_NAME); */ + _G.in_home = inHome; + // } } -static int _opUsesPair(operand *op, iCode *ic, PAIR_ID pairId) +static bool +isInHome (void) { - int ret = 0; - asmop *aop; - symbol *sym = OP_SYMBOL(op); + return _G.in_home; +} - if (sym->isspilt || sym->nRegs == 0) - return 0; +static int +_opUsesPair (operand * op, iCode * ic, PAIR_ID pairId) +{ + int ret = 0; + asmop *aop; + symbol *sym = OP_SYMBOL (op); - aopOp(op, ic, FALSE, FALSE); + if (sym->isspilt || sym->nRegs == 0) + return 0; - aop = AOP(op); - if (aop->type == AOP_REG) { - int i; - for (i=0; i < aop->size; i++) { - if (pairId == PAIR_DE) { - emit2("; name %s", aop->aopu.aop_reg[i]->name); - if (!strcmp(aop->aopu.aop_reg[i]->name, "e")) - ret++; - if (!strcmp(aop->aopu.aop_reg[i]->name, "d")) - ret++; - } - else { - wassert(0); - } - } + aopOp (op, ic, FALSE, FALSE); + + aop = AOP (op); + if (aop->type == AOP_REG) + { + int i; + for (i = 0; i < aop->size; i++) + { + if (pairId == PAIR_DE) + { + emitDebug ("; name %s", aop->aopu.aop_reg[i]->name); + if (!strcmp (aop->aopu.aop_reg[i]->name, "e")) + ret++; + if (!strcmp (aop->aopu.aop_reg[i]->name, "d")) + ret++; + } + else if (pairId == PAIR_BC) + { + emitDebug ("; name %s", aop->aopu.aop_reg[i]->name); + if (!strcmp (aop->aopu.aop_reg[i]->name, "c")) + ret++; + if (!strcmp (aop->aopu.aop_reg[i]->name, "b")) + ret++; + } + else + { + wassert (0); + } + } } - freeAsmop(IC_LEFT(ic),NULL,ic); - return ret; + freeAsmop (IC_LEFT (ic), NULL, ic); + return ret; } -/* This is quite unfortunate */ -static void setArea(int inHome) +/** Emit the code for a call statement + */ +static void +emitCall (iCode * ic, bool ispcall) { - static int lastArea = 0; + bool bInRet, cInRet, dInRet, eInRet; + sym_link *dtype = operandType (IC_LEFT (ic)); - /* - if (_G.in_home != inHome) { - if (inHome) { - const char *sz = port->mem.code_name; - port->mem.code_name = "HOME"; - emit2("!area", CODE_NAME); - port->mem.code_name = sz; - } - else - emit2("!area", CODE_NAME);*/ - _G.in_home = inHome; - // } -} + /* if caller saves & we have not saved then */ + if (!ic->regsSaved) + { + /* PENDING */ + } -static bool isInHome(void) -{ - return _G.in_home; -} + _saveRegsForCall(ic, _G.sendSet ? elementsInSet(_G.sendSet) : 0); -/** Emit the code for a call statement - */ -static void emitCall(iCode *ic, bool ispcall) -{ - int pushed_de = 0; - sym_link *detype = getSpec(operandType(IC_LEFT(ic))); - - /* if caller saves & we have not saved then */ - if (!ic->regsSaved) { - /* PENDING */ - } - - /* if send set is not empty then assign */ - if (sendSet) { - iCode *sic; - int send = 0; - int n = elementsInSet(sendSet); - if (IS_Z80 && n == 2 && _isPairUsed(ic, PAIR_DE)) { - /* Only push de if it is used and if it's not used - in the return value */ - /* Panic if partly used */ - if (_opUsesPair(IC_RESULT(ic), ic, PAIR_DE) == 1) { - emit2("; Warning: de crossover"); - } - else if (!_opUsesPair(IC_RESULT(ic), ic, PAIR_DE)) { - /* Store away de */ - _push(PAIR_DE); - pushed_de = 1; + /* if send set is not empty then assign */ + if (_G.sendSet) + { + iCode *sic; + int send = 0; + int nSend = elementsInSet(_G.sendSet); + bool swapped = FALSE; + + int _z80_sendOrder[] = { + PAIR_BC, PAIR_DE + }; + + if (nSend > 1) { + /* Check if the parameters are swapped. If so route through hl instead. */ + wassertl (nSend == 2, "Pedantic check. Code only checks for the two send items case."); + + sic = setFirstItem(_G.sendSet); + sic = setNextItem(_G.sendSet); + + if (_opUsesPair (IC_LEFT(sic), sic, _z80_sendOrder[0])) { + /* The second send value is loaded from one the one that holds the first + send, i.e. it is overwritten. */ + /* Cache the first in HL, and load the second from HL instead. */ + emit2 ("ld h,%s", _pairs[_z80_sendOrder[0]].h); + emit2 ("ld l,%s", _pairs[_z80_sendOrder[0]].l); + + swapped = TRUE; + } } - } - /* PENDING: HACK */ - if (IS_Z80 && n == 2 ) { - /* Want to load HL first, then DE as HL may = DE */ - sic = setFirstItem(sendSet); - sic = setNextItem(sendSet); - aopOp(IC_LEFT(sic),sic,FALSE, FALSE); - fetchPair(PAIR_HL, AOP(IC_LEFT(sic))); - send++; - freeAsmop (IC_LEFT(sic),NULL,sic); - sic = setFirstItem(sendSet); - aopOp(IC_LEFT(sic),sic,FALSE, FALSE); - fetchPair(PAIR_DE, AOP(IC_LEFT(sic))); - send++; - freeAsmop (IC_LEFT(sic),NULL,sic); - } - else { - for (sic = setFirstItem(sendSet) ; sic ; - sic = setNextItem(sendSet)) { - int size; - aopOp(IC_LEFT(sic),sic,FALSE, FALSE); - size = AOP_SIZE(IC_LEFT(sic)); - wassert(size <= 2); - /* Always send in pairs */ - switch (send) { - case 0: - if (IS_Z80 && n == 1) - fetchPair(PAIR_HL, AOP(IC_LEFT(sic))); - else - fetchPair(PAIR_DE, AOP(IC_LEFT(sic))); - break; - case 1: - fetchPair(PAIR_HL, AOP(IC_LEFT(sic))); - break; - default: - /* Send set too big */ - wassert(0); + + for (sic = setFirstItem (_G.sendSet); sic; + sic = setNextItem (_G.sendSet)) + { + int size; + aopOp (IC_LEFT (sic), sic, FALSE, FALSE); + + size = AOP_SIZE (IC_LEFT (sic)); + wassertl (size <= 2, "Tried to send a parameter that is bigger than two bytes"); + wassertl (_z80_sendOrder[send] != PAIR_INVALID, "Tried to send more parameters than we have registers for"); + + // PENDING: Mild hack + if (swapped == TRUE && send == 1) { + if (size > 1) { + emit2 ("ld %s,h", _pairs[_z80_sendOrder[send]].h); + } + else { + emit2 ("ld %s,!zero", _pairs[_z80_sendOrder[send]].h); + } + emit2 ("ld %s,l", _pairs[_z80_sendOrder[send]].l); + } + else { + fetchPair(_z80_sendOrder[send], AOP (IC_LEFT (sic))); + } + + send++; + freeAsmop (IC_LEFT (sic), NULL, sic); + } + _G.sendSet = NULL; } - send++; - freeAsmop (IC_LEFT(sic),NULL,sic); - } - } - sendSet = NULL; - if (pushed_de) { - } + + if (ispcall) + { + if (IFFUNC_ISBANKEDCALL (dtype) && !SPEC_STAT(getSpec(dtype))) + { + werror (W_INDIR_BANKED); + } + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + + if (isLitWord (AOP (IC_LEFT (ic)))) + { + emit2 ("call %s", aopGetLitWordLong (AOP (IC_LEFT (ic)), 0, FALSE)); + } + else + { + symbol *rlbl = newiTempLabel (NULL); + spillPair (PAIR_HL); + emit2 ("ld hl,!immed!tlabel", (rlbl->key + 100)); + emit2 ("push hl"); + _G.stack.pushed += 2; + + fetchHL (AOP (IC_LEFT (ic))); + emit2 ("jp !*hl"); + emit2 ("!tlabeldef", (rlbl->key + 100)); + _G.stack.pushed -= 2; + } + freeAsmop (IC_LEFT (ic), NULL, ic); + } + else + { + char *name = OP_SYMBOL (IC_LEFT (ic))->rname[0] ? + OP_SYMBOL (IC_LEFT (ic))->rname : + OP_SYMBOL (IC_LEFT (ic))->name; + if (IFFUNC_ISBANKEDCALL (dtype) && !SPEC_STAT(getSpec(dtype))) + { + emit2 ("call banked_call"); + emit2 ("!dws", name); + emit2 ("!dw !bankimmeds", name); + } + else + { + /* make the call */ + emit2 ("call %s", name); + } } + spillCached (); - if (ispcall) { - if (IS_BANKEDCALL(detype)) { - werror(W_INDIR_BANKED); - } - aopOp(IC_LEFT(ic),ic,FALSE, FALSE); + /* Mark the registers as restored. */ + _G.saves.saved = FALSE; - if (isLitWord(AOP(IC_LEFT(ic)))) { - emitcode("", "; Special case where the pCall is to a constant"); - emitcode("call", aopGetLitWordLong(AOP(IC_LEFT(ic)), 0, FALSE)); - } - else { - symbol *rlbl = newiTempLabel(NULL); - spillPair(PAIR_HL); - emit2("ld hl,!immed!tlabel", (rlbl->key+100)); - emitcode("push", "hl"); - _G.stack.pushed += 2; + /* 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))) + { - fetchHL(AOP(IC_LEFT(ic))); - emit2("jp !*hl"); - emit2("!tlabeldef", (rlbl->key+100)); - _G.stack.pushed -= 2; - } - freeAsmop(IC_LEFT(ic),NULL,ic); - } - else { - char *name = OP_SYMBOL(IC_LEFT(ic))->rname[0] ? - OP_SYMBOL(IC_LEFT(ic))->rname : - OP_SYMBOL(IC_LEFT(ic))->name; - if (IS_BANKEDCALL(detype)) { - emit2("call banked_call"); - emit2("!dws", name); - emit2("!dw !bankimmeds", name); - } - else { - /* make the call */ - emit2("call %s", name); - } - } - spillCached(); + aopOp (IC_RESULT (ic), ic, FALSE, FALSE); - /* 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)) ) { + assignResultValue (IC_RESULT (ic)); - accInUse++; - aopOp(IC_RESULT(ic),ic,FALSE, FALSE); - accInUse--; + freeAsmop (IC_RESULT (ic), NULL, ic); + } - assignResultValue(IC_RESULT(ic)); + /* adjust the stack for parameters if required */ + if (ic->parmBytes) + { + int i = ic->parmBytes; - freeAsmop(IC_RESULT(ic),NULL, ic); + _G.stack.pushed -= i; + if (IS_GB) + { + emit2 ("!ldaspsp", i); + } + else + { + spillCached (); + if (i > 8) + { + emit2 ("ld iy,!immedword", i); + emit2 ("add iy,sp"); + emit2 ("ld sp,iy"); + } + else + { + while (i > 1) + { + emit2 ("pop af"); + i -= 2; + } + if (i) + { + emit2 ("inc sp"); + } + } + } } - /* adjust the stack for parameters if required */ - if (IC_LEFT(ic)->parmBytes) { - int i = IC_LEFT(ic)->parmBytes; - _G.stack.pushed -= i; - if (IS_GB) { - emit2("!ldaspsp", i); - } - else { - spillCached(); - if (i>6) { - emitcode("ld", "hl,#%d", i); - emitcode("add", "hl,sp"); - emitcode("ld", "sp,hl"); - } - else { - while (i>1) { - emitcode("pop", "hl"); - i-=2; + spillCached (); + if (IC_RESULT (ic)) + { + bitVect *result = z80_rUmaskForOp (IC_RESULT (ic)); + bInRet = bitVectBitValue(result, B_IDX); + cInRet = bitVectBitValue(result, C_IDX); + dInRet = bitVectBitValue(result, D_IDX); + eInRet = bitVectBitValue(result, E_IDX); } - if (i) - emitcode("inc", "sp"); - } - spillCached(); - } + else + { + bInRet = FALSE; + cInRet = FALSE; + dInRet = FALSE; + eInRet = FALSE; + } + + if (_G.stack.pushedDE) + { + if (dInRet && eInRet) + { + wassertl (0, "Shouldn't push DE if it's wiped out by the return"); + } + else if (dInRet) + { + /* Only restore E */ + emit2 ("ld a,d"); + _pop (PAIR_DE); + emit2 ("ld d,a"); + } + else if (eInRet) + { + /* Only restore D */ + _pop (PAIR_AF); + emit2 ("ld d,a"); + } + else + { + _pop (PAIR_DE); + } + _G.stack.pushedDE = FALSE; + } + + if (_G.stack.pushedBC) + { + if (bInRet && cInRet) + { + wassertl (0, "Shouldn't push BC if it's wiped out by the return"); + } + else if (bInRet) + { + /* Only restore C */ + emit2 ("ld a,b"); + _pop (PAIR_BC); + emit2 ("ld b,a"); + } + else if (cInRet) + { + /* Only restore B */ + _pop (PAIR_AF); + emit2 ("ld b,a"); + } + else + { + _pop (PAIR_BC); + } + _G.stack.pushedBC = FALSE; } - if (pushed_de) - _pop(PAIR_DE); } /*-----------------------------------------------------------------*/ /* genCall - generates a call statement */ /*-----------------------------------------------------------------*/ -static void genCall (iCode *ic) +static void +genCall (iCode * ic) { - sym_link *detype = getSpec(operandType(IC_LEFT(ic))); - emitCall(ic, FALSE); + emitCall (ic, FALSE); } /*-----------------------------------------------------------------*/ /* genPcall - generates a call by pointer statement */ /*-----------------------------------------------------------------*/ -static void genPcall (iCode *ic) +static void +genPcall (iCode * ic) { - emitCall(ic, TRUE); + emitCall (ic, TRUE); } /*-----------------------------------------------------------------*/ /* resultRemat - result is rematerializable */ /*-----------------------------------------------------------------*/ -static int resultRemat (iCode *ic) +static int +resultRemat (iCode * ic) { - if (SKIP_IC(ic) || ic->op == IFX) - return 0; + 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; + 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; + return 0; } extern set *publics; @@ -1908,1017 +3085,1746 @@ extern set *publics; /*-----------------------------------------------------------------*/ /* genFunction - generated code for function entry */ /*-----------------------------------------------------------------*/ -static void genFunction (iCode *ic) +static void +genFunction (iCode * ic) { - symbol *sym = OP_SYMBOL(IC_LEFT(ic)); - sym_link *fetype; + bool stackParm; + + symbol *sym = OP_SYMBOL (IC_LEFT (ic)); + sym_link *ftype; + + bool bcInUse = FALSE; + bool deInUse = FALSE; - nregssaved = 0; - setArea(IS_NONBANKED(sym->etype)); + setArea (IFFUNC_NONBANKED (sym->type)); - /* PENDING: hack */ - if (!IS_STATIC(sym->etype)) { - addSetIfnotP(&publics, sym); + /* PENDING: Reset the receive offset as it + doesn't seem to get reset anywhere else. + */ + _G.receiveOffset = 0; + + /* Record the last function name for debugging. */ + _G.lastFunctionName = sym->rname; + + /* Create the function header */ + emit2 ("!functionheader", sym->name); + if (!IS_STATIC(sym->etype)) + { + sprintf (buffer, "%s_start", sym->rname); + emit2 ("!labeldef", buffer); } + emit2 ("!functionlabeldef", sym->rname); - /* create the function header */ - emit2("!functionheader", sym->name); - /* PENDING: portability. */ - emit2("__%s_start:", sym->rname); - emit2("!functionlabeldef", sym->rname); + ftype = operandType (IC_LEFT (ic)); - fetype = getSpec(operandType(IC_LEFT(ic))); + if (IFFUNC_ISNAKED(ftype)) + { + emitDebug("; naked function: no prologue."); + return; + } - /* if critical function then turn interrupts off */ - if (SPEC_CRTCL(fetype)) - emit2("!di"); + /* if this is an interrupt service routine + then save all potentially used registers. */ + if (IFFUNC_ISISR (sym->type)) + { + /* If critical function then turn interrupts off */ + /* except when no interrupt number is given then it implies the NMI handler */ + if (IFFUNC_ISCRITICAL (sym->type) && (FUNC_INTNO(sym->type) != INTNO_UNSPEC)) + { + emit2 ("!di"); + } - /* if this is an interrupt service routine then - save acc, b, dpl, dph */ - if (IS_ISR(sym->etype)) { - emit2("!pusha"); + emit2 ("!pusha"); + } + else + { + /* This is a non-ISR function. + If critical function then turn interrupts off */ + if (IFFUNC_ISCRITICAL (sym->type)) + { + if (IS_GB) + { + emit2 ("!di"); + } + else + { + //get interrupt enable flag IFF2 into P/O + emit2 ("ld a,i"); + emit2 ("!di"); + //save P/O flag + emit2 ("push af"); + } + } } - /* PENDING: callee-save etc */ - /* If BC or DE are used, then push */ - _G.stack.pushed_bc = 0; - _G.stack.pushed_de = 0; - _G.stack.param_offset = 0; - if (sym->regsUsed) { - int i; - for ( i = 0 ; i < sym->regsUsed->size ; i++) { - if (bitVectBitValue(sym->regsUsed, i)) { - switch (i) { - case C_IDX: - case B_IDX: - _G.stack.pushed_bc = 1; - break; - case D_IDX: - case E_IDX: - if (IS_Z80) - _G.stack.pushed_de = 1; - break; + if (options.profile) + { + emit2 ("!profileenter"); } - } - } - if (_G.stack.pushed_bc) { - emit2("push bc"); + + /* PENDING: callee-save etc */ + + _G.stack.param_offset = 0; + + if (z80_opts.calleeSavesBC) + { + bcInUse = TRUE; + } + + /* Detect which registers are used. */ + if (IFFUNC_CALLEESAVES(sym->type) && sym->regsUsed) + { + int i; + for (i = 0; i < sym->regsUsed->size; i++) + { + if (bitVectBitValue (sym->regsUsed, i)) + { + switch (i) + { + case C_IDX: + case B_IDX: + bcInUse = TRUE; + break; + case D_IDX: + case E_IDX: + if (IS_Z80) { + deInUse = TRUE; + } + else { + /* Other systems use DE as a temporary. */ + } + break; + } + } + } + } + + if (bcInUse) + { + emit2 ("push bc"); _G.stack.param_offset += 2; - } - if (_G.stack.pushed_de) { - emit2("push de"); + } + + _G.calleeSaves.pushedBC = bcInUse; + + if (deInUse) + { + emit2 ("push de"); _G.stack.param_offset += 2; - } } - /* adjust the stack for the function */ - _G.stack.last = sym->stack; + _G.calleeSaves.pushedDE = deInUse; - if (sym->stack) - emit2("!enterx", sym->stack); - else - emit2("!enter"); - _G.stack.offset = sym->stack; + /* adjust the stack for the function */ + _G.stack.last = sym->stack; + + stackParm = FALSE; + for (sym = setFirstItem (istack->syms); sym; + sym = setNextItem (istack->syms)) + { + if (sym->_isparm && !IS_REGPARM (sym->etype)) + { + stackParm = TRUE; + break; + } + } + sym = OP_SYMBOL (IC_LEFT (ic)); + + _G.omitFramePtr = options.ommitFramePtr; + if (IS_Z80 && !stackParm && !sym->stack) + { + /* When the conflicts between AOP_EXSTK && AOP_HLREG are fixed, */ + /* the above !sym->stack condition can be removed. -- EEP */ + if (sym->stack) + emit2 ("!ldaspsp", -sym->stack); + _G.omitFramePtr = TRUE; + } + else if (sym->stack && IS_GB && sym->stack > -INT8MIN) + emit2 ("!enterxl", sym->stack); + else if (sym->stack) + emit2 ("!enterx", sym->stack); + else + emit2 ("!enter"); + + _G.stack.offset = sym->stack; } /*-----------------------------------------------------------------*/ /* genEndFunction - generates epilogue for functions */ /*-----------------------------------------------------------------*/ -static void genEndFunction (iCode *ic) +static void +genEndFunction (iCode * ic) { - symbol *sym = OP_SYMBOL(IC_LEFT(ic)); + symbol *sym = OP_SYMBOL (IC_LEFT (ic)); - if (IS_ISR(sym->etype)) { - wassert(0); - } - else { - if (SPEC_CRTCL(sym->etype)) - emit2("!ei"); + if (IFFUNC_ISNAKED(sym->type)) + { + emitDebug("; naked function: no epilogue."); + return; + } /* PENDING: calleeSave */ + if (IS_Z80 && _G.omitFramePtr) + { + if (_G.stack.offset) + emit2 ("!ldaspsp", _G.stack.offset); + } + else if (_G.stack.offset && IS_GB && _G.stack.offset > INT8MAX) + { + emit2 ("!leavexl", _G.stack.offset); + } + else if (_G.stack.offset) + { + emit2 ("!leavex", _G.stack.offset); + } + else + { + emit2 ("!leave"); + } - /* if debug then send end of function */ - if (options.debug && currFunc) { - debugLine = 1; - emitcode("","C$%s$%d$%d$%d ==.", - FileBaseName(ic->filename),currFunc->lastLine, - ic->level,ic->block); - if (IS_STATIC(currFunc->etype)) - emitcode("","XF%s$%s$0$0 ==.",moduleName,currFunc->name); - else - emitcode("","XG$%s$0$0 ==.",currFunc->name); - debugLine = 0; - } - if (_G.stack.offset) - emit2("!leavex", _G.stack.offset); + if (_G.calleeSaves.pushedDE) + { + emit2 ("pop de"); + _G.calleeSaves.pushedDE = FALSE; + } + + if (_G.calleeSaves.pushedBC) + { + emit2 ("pop bc"); + _G.calleeSaves.pushedBC = FALSE; + } + + if (options.profile) + { + emit2 ("!profileexit"); + } + + /* if this is an interrupt service routine + then save all potentially used registers. */ + if (IFFUNC_ISISR (sym->type)) + { + emit2 ("!popa"); + + /* If critical function then turn interrupts back on */ + /* except when no interrupt number is given then it implies the NMI handler */ + if (IFFUNC_ISCRITICAL (sym->type) && (FUNC_INTNO(sym->type) != INTNO_UNSPEC)) + { + emit2 ("!ei"); + } + } else - emit2("!leave"); + { + /* This is a non-ISR function. + If critical function then turn interrupts back on */ + if (IFFUNC_ISCRITICAL (sym->type)) + { + if (IS_GB) + { + emit2 ("!ei"); + } + else + { + symbol *tlbl = newiTempLabel (NULL); + //restore P/O flag + emit2 ("pop af"); + //parity odd <==> P/O=0 <==> interrupt enable flag IFF2 was 0 <==> + //don't enable interrupts as they were off before + emit2 ("jp PO,!tlabel", tlbl->key + 100); + emit2 ("!ei"); + emit2 ("!tlabeldef", (tlbl->key + 100)); + } + } + } + + if (options.debug && currFunc) + { + debugFile->writeEndFunction (currFunc, ic, 1); + } - if (_G.stack.pushed_de) - emit2("pop de"); - if (_G.stack.pushed_bc) - emit2("pop bc"); - /* Both baned and non-banked just ret */ - emit2("ret"); + if (IFFUNC_ISISR (sym->type)) + { + /* "critical interrupt" is used to imply NMI handler */ + if (IS_Z80 && IFFUNC_ISCRITICAL (sym->type) && FUNC_INTNO(sym->type) == INTNO_UNSPEC) + emit2 ("retn"); + else + emit2 ("reti"); + } + else + { + /* Both banked and non-banked just ret */ + emit2 ("ret"); + } - /* PENDING: portability. */ - emit2("__%s_end:", sym->rname); + if (!IS_STATIC(sym->etype)) + { + sprintf (buffer, "%s_end", sym->rname); + emit2 ("!labeldef", buffer); } - _G.flush_statics = 1; - _G.stack.pushed = 0; - _G.stack.offset = 0; + + _G.flushStatics = 1; + _G.stack.pushed = 0; + _G.stack.offset = 0; } /*-----------------------------------------------------------------*/ /* genRet - generate code for return statement */ /*-----------------------------------------------------------------*/ -static void genRet (iCode *ic) +static void +genRet (iCode * ic) { - char *l; - /* Errk. This is a hack until I can figure out how - to cause dehl to spill on a call */ - int size,offset = 0; + const char *l; + /* Errk. This is a hack until I can figure out how + to cause dehl to spill on a call */ + int size, offset = 0; - /* if we have no return value then - just generate the "ret" */ - if (!IC_LEFT(ic)) - goto jumpret; + /* 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, FALSE); - size = AOP_SIZE(IC_LEFT(ic)); + /* we have something to return then + move the return value into place */ + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + size = AOP_SIZE (IC_LEFT (ic)); - if ((size == 2) && ((l = aopGetWord(AOP(IC_LEFT(ic)), 0)))) { - if (IS_GB) { - emitcode("ld", "de,%s", l); - } - else { - emitcode("ld", "hl,%s", l); - } + aopDump("IC_LEFT", AOP(IC_LEFT(ic))); + + #if 0 + if ((size == 2) && ((l = aopGetWord (AOP (IC_LEFT (ic)), 0)))) + { + if (IS_GB) + { + emit2 ("ld de,%s", l); + } + else + { + emit2 ("ld hl,%s", l); + } } - else { - if (IS_GB && size == 4 && requiresHL(AOP(IC_LEFT(ic)))) { - fetchPair(PAIR_DE, AOP(IC_LEFT(ic))); - fetchPairLong(PAIR_HL, AOP(IC_LEFT(ic)), 2); - } - else { - while (size--) { - l = aopGet(AOP(IC_LEFT(ic)),offset, - FALSE); - if (strcmp(_fReturn[offset],l)) - emitcode("ld","%s,%s", _fReturn[offset++],l); - } - } + #endif + if (size==2) + { + fetchPair(IS_GB ? PAIR_DE : PAIR_HL, AOP (IC_LEFT (ic))); + } + else + { + if (IS_GB && size == 4 && requiresHL (AOP (IC_LEFT (ic)))) + { + fetchPair (PAIR_DE, AOP (IC_LEFT (ic))); + fetchPairLong (PAIR_HL, AOP (IC_LEFT (ic)), ic, 2); + } + else + { + while (size--) + { + l = aopGet (AOP (IC_LEFT (ic)), offset, + FALSE); + if (strcmp (_fReturn[offset], l)) + emit2 ("ld %s,%s", _fReturn[offset], l); + offset++; + } + } } - freeAsmop (IC_LEFT(ic),NULL,ic); + freeAsmop (IC_LEFT (ic), NULL, ic); - jumpret: +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)) + if (!(ic->next && ic->next->op == LABEL && + IC_LABEL (ic->next) == returnLabel)) - emit2("jp !tlabel", returnLabel->key+100); + emit2 ("jp !tlabel", returnLabel->key + 100); } /*-----------------------------------------------------------------*/ /* genLabel - generates a label */ /*-----------------------------------------------------------------*/ -static void genLabel (iCode *ic) +static void +genLabel (iCode * ic) { - /* special case never generate */ - if (IC_LABEL(ic) == entryLabel) - return ; + /* special case never generate */ + if (IC_LABEL (ic) == entryLabel) + return; - emitLabel(IC_LABEL(ic)->key+100); + emitLabel (IC_LABEL (ic)->key + 100); } /*-----------------------------------------------------------------*/ /* genGoto - generates a ljmp */ /*-----------------------------------------------------------------*/ -static void genGoto (iCode *ic) +static void +genGoto (iCode * ic) { - emit2("jp !tlabel", IC_LABEL(ic)->key+100); + emit2 ("jp !tlabel", IC_LABEL (ic)->key + 100); } /*-----------------------------------------------------------------*/ /* genPlusIncr :- does addition with increment if possible */ /*-----------------------------------------------------------------*/ -static bool genPlusIncr (iCode *ic) +static bool +genPlusIncr (iCode * ic) { - unsigned int icount ; - unsigned int size = getDataSize(IC_RESULT(ic)); - PAIR_ID resultId = getPairId(AOP(IC_RESULT(ic))); - - /* will try to generate an increment */ - /* if the right side is not a literal - we cannot */ - if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT) - return FALSE; + unsigned int icount; + unsigned int size = getDataSize (IC_RESULT (ic)); + PAIR_ID resultId = getPairId (AOP (IC_RESULT (ic))); + + /* will try to generate an increment */ + /* if the right side is not a literal + we cannot */ + if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT) + return FALSE; - emitcode("", "; genPlusIncr"); + emitDebug ("; genPlusIncr"); - icount = floatFromVal(AOP(IC_RIGHT(ic))->aopu.aop_lit); + icount = (unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit); - /* If result is a pair */ - if (resultId != PAIR_INVALID) { - if (isLitWord(AOP(IC_LEFT(ic)))) { - fetchLitPair(getPairId(AOP(IC_RESULT(ic))), AOP(IC_LEFT(ic)), icount); + /* If result is a pair */ + if (resultId != PAIR_INVALID) + { + if (isLitWord (AOP (IC_LEFT (ic)))) + { + fetchLitPair (getPairId (AOP (IC_RESULT (ic))), AOP (IC_LEFT (ic)), icount); + return TRUE; + } + if (isPair (AOP (IC_LEFT (ic))) && resultId == PAIR_HL && icount > 2) + { + if (getPairId (AOP (IC_LEFT (ic))) == PAIR_HL) + { + PAIR_ID freep = getFreePairId (ic); + if (freep != PAIR_INVALID) + { + fetchPair (freep, AOP (IC_RIGHT (ic))); + emit2 ("add hl,%s", _pairs[freep].name); + return TRUE; + } + } + else + { + fetchPair (resultId, AOP (IC_RIGHT (ic))); + emit2 ("add hl,%s", getPairName (AOP (IC_LEFT (ic)))); + return TRUE; + } + } + if (icount > 5) + return FALSE; + /* Inc a pair */ + if (!sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic)))) + { + if (icount > 2) + return FALSE; + movLeft2ResultLong (IC_LEFT (ic), 0, IC_RESULT (ic), 0, 0, 2); + } + while (icount--) + { + emit2 ("inc %s", getPairName (AOP (IC_RESULT (ic)))); + } return TRUE; - } - if (isPair(AOP(IC_LEFT(ic))) && resultId == PAIR_HL && icount > 2) { - fetchPair(resultId, AOP(IC_RIGHT(ic))); - emitcode("add", "hl,%s", getPairName(AOP(IC_LEFT(ic)))); + } + + if (IS_Z80 && isLitWord (AOP (IC_LEFT (ic))) && size == 2) + { + fetchLitPair (PAIR_HL, AOP (IC_LEFT (ic)), icount); + commitPair (AOP (IC_RESULT (ic)), PAIR_HL); return TRUE; - } - if (icount > 5) - return FALSE; - /* Inc a pair */ - if (!sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic)))) { - if (icount > 2) - return FALSE; - movLeft2Result(IC_LEFT(ic), 0, IC_RESULT(ic), 0, 0); - movLeft2Result(IC_LEFT(ic), 1, IC_RESULT(ic), 1, 0); - } - while (icount--) { - emitcode("inc", "%s", getPairName(AOP(IC_RESULT(ic)))); - } - return TRUE; } - /* if the literal value of the right hand side - is greater than 4 then it is not worth it */ - if (icount > 4) - return FALSE; + /* if the literal value of the right hand side + is greater than 4 then it is not worth it */ + if (icount > 4) + return FALSE; - /* if increment 16 bits in register */ - if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) && - size > 1 && - icount == 1 - ) { - int offset = 0; - symbol *tlbl = NULL; - tlbl = newiTempLabel(NULL); - while (size--) { - emitcode("inc","%s",aopGet(AOP(IC_RESULT(ic)), offset++, FALSE)); - if (size) { - emit2("!shortjp nz,!tlabel", tlbl->key+100); - } - } - emitLabel(tlbl->key+100); - return TRUE; + /* if increment 16 bits in register */ + if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))) && + size > 1 && + icount == 1 + ) + { + int offset = 0; + symbol *tlbl = NULL; + tlbl = newiTempLabel (NULL); + while (size--) + { + emit2 ("inc %s", aopGet (AOP (IC_RESULT (ic)), offset++, FALSE)); + if (size) + { + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); + } + } + emitLabel (tlbl->key + 100); + return TRUE; } - /* if the sizes are greater than 1 then we cannot */ - if (AOP_SIZE(IC_RESULT(ic)) > 1 || - AOP_SIZE(IC_LEFT(ic)) > 1 ) - return FALSE ; + /* if the sizes are greater than 1 then we cannot */ + if (AOP_SIZE (IC_RESULT (ic)) > 1 || + AOP_SIZE (IC_LEFT (ic)) > 1) + return FALSE; + + /* If the result is in a register then we can load then increment. + */ + if (AOP_TYPE (IC_RESULT (ic)) == AOP_REG) + { + aopPut (AOP (IC_RESULT (ic)), aopGet (AOP (IC_LEFT (ic)), LSB, FALSE), LSB); + while (icount--) + { + emit2 ("inc %s", aopGet (AOP (IC_RESULT (ic)), LSB, FALSE)); + } + return TRUE; + } - /* we can if the aops of the left & result match or - if they are in registers and the registers are the - same */ - if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) ) { - while (icount--) - emitcode ("inc","%s",aopGet(AOP(IC_LEFT(ic)),0, FALSE)); - return TRUE ; + /* we can if the aops of the left & result match or + if they are in registers and the registers are the + same */ + if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic)))) + { + while (icount--) + { + emit2 ("inc %s", aopGet (AOP (IC_LEFT (ic)), 0, FALSE)); + } + return TRUE; } - return FALSE ; + return FALSE; } /*-----------------------------------------------------------------*/ /* outBitAcc - output a bit in acc */ /*-----------------------------------------------------------------*/ -void outBitAcc(operand *result) +void +outBitAcc (operand * result) { - symbol *tlbl = newiTempLabel(NULL); - /* if the result is a bit */ - if (AOP_TYPE(result) == AOP_CRY){ - wassert(0); + symbol *tlbl = newiTempLabel (NULL); + /* if the result is a bit */ + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Tried to write A into a bit"); } - else { - emit2("!shortjp z,!tlabel", tlbl->key+100); - emit2("ld a,!one"); - emitLabel(tlbl->key+100); - outAcc(result); + else + { + emit2 ("!shortjp Z,!tlabel", tlbl->key + 100); + emit2 ("ld a,!one"); + emitLabel (tlbl->key + 100); + outAcc (result); } } -/*-----------------------------------------------------------------*/ -/* genPlus - generates code for addition */ -/*-----------------------------------------------------------------*/ -static void genPlus (iCode *ic) +bool +couldDestroyCarry (asmop *aop) { - int size, offset = 0; - - /* special cases :- */ + if (aop) + { + if (aop->type == AOP_EXSTK || aop->type == AOP_IY) + { + return TRUE; + } + } + return FALSE; +} - aopOp (IC_LEFT(ic),ic,FALSE, FALSE); - aopOp (IC_RIGHT(ic),ic,FALSE, FALSE); - aopOp (IC_RESULT(ic),ic,TRUE, FALSE); +static void +shiftIntoPair (int idx, asmop *aop) +{ + PAIR_ID id = PAIR_INVALID; - /* Swap the left and right operands if: + wassertl (IS_Z80, "Only implemented for the Z80"); + // wassertl (aop->type == AOP_EXSTK, "Only implemented for EXSTK"); - if literal, literal on the right or - if left requires ACC or right is already - in ACC */ + emitDebug ("; Shift into pair idx %u", idx); - if ((AOP_TYPE(IC_LEFT(ic)) == AOP_LIT) || - (AOP_NEEDSACC(IC_LEFT(ic))) || - AOP_TYPE(IC_RIGHT(ic)) == AOP_ACC ){ - operand *t = IC_RIGHT(ic); - IC_RIGHT(ic) = IC_LEFT(ic); - IC_LEFT(ic) = t; + switch (idx) + { + case 0: + id = PAIR_HL; + setupPair (PAIR_HL, aop, 0); + break; + case 1: + id = PAIR_DE; + _push (PAIR_DE); + setupPair (PAIR_IY, aop, 0); + emit2 ("push iy"); + emit2 ("pop %s", _pairs[id].name); + break; + case 2: + id = PAIR_IY; + setupPair (PAIR_IY, aop, 0); + break; + default: + wassertl (0, "Internal error - hit default case"); } - /* if both left & right are in bit - space */ - if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY && - AOP_TYPE(IC_RIGHT(ic)) == AOP_CRY) { - /* Cant happen */ - wassert(0); - } + aop->type = AOP_PAIRPTR; + aop->aopu.aop_pairId = id; + _G.pairs[id].offset = 0; + _G.pairs[id].last_type = aop->type; +} - /* if left in bit space & right literal */ - if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY && - AOP_TYPE(IC_RIGHT(ic)) == AOP_LIT) { - /* Can happen I guess */ - wassert(0); - } +static void +setupToPreserveCarry (iCode * ic) +{ + asmop *left = AOP (IC_LEFT (ic)); + asmop *right = AOP (IC_RIGHT (ic)); + asmop *result = AOP (IC_RESULT (ic)); - /* if I can do an increment instead - of add then GOOD for ME */ - if (genPlusIncr (ic) == TRUE) - goto release; + wassert (left && right); - emit2("; genPlusIncr failed"); + if (IS_Z80) + { + if (couldDestroyCarry (right) && couldDestroyCarry (result)) + { + shiftIntoPair (0, right); + /* check result again, in case right == result */ + if (couldDestroyCarry (result)) + { + if (!isPairInUse (PAIR_DE, ic)) + shiftIntoPair (1, result); + else + shiftIntoPair (2, result); + } + } + else if (couldDestroyCarry (right)) + { + if (getPairId (result) == PAIR_HL) + _G.preserveCarry = TRUE; + else + shiftIntoPair (0, right); + } + else if (couldDestroyCarry (result)) + { + shiftIntoPair (0, result); + } + else + { + /* Fine */ + } + } +} - size = getDataSize(IC_RESULT(ic)); +/*-----------------------------------------------------------------*/ +/* genPlus - generates code for addition */ +/*-----------------------------------------------------------------*/ +static void +genPlus (iCode * ic) +{ + int size, offset = 0; - /* Special case when left and right are constant */ - if (isPair(AOP(IC_RESULT(ic)))) { - char *left, *right; + /* special cases :- */ - left = aopGetLitWordLong(AOP(IC_LEFT(ic)), 0, FALSE); - right = aopGetLitWordLong(AOP(IC_RIGHT(ic)), 0, FALSE); - if (left && right) { - /* It's a pair */ - /* PENDING: fix */ - char buffer[100]; - sprintf(buffer, "#(%s + %s)", left, right); - emitcode("ld", "%s,%s", getPairName(AOP(IC_RESULT(ic))), buffer); - goto release; - } + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + aopOp (IC_RIGHT (ic), ic, FALSE, FALSE); + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); + + /* Swap the left and right operands if: + + if literal, literal on the right or + if left requires ACC or right is already + in ACC */ + + if ((AOP_TYPE (IC_LEFT (ic)) == AOP_LIT) || + (AOP_NEEDSACC (IC_RIGHT (ic))) || + AOP_TYPE (IC_RIGHT (ic)) == AOP_ACC) + { + operand *t = IC_RIGHT (ic); + IC_RIGHT (ic) = IC_LEFT (ic); + IC_LEFT (ic) = t; } - if (isPair(AOP(IC_RIGHT(ic))) && getPairId(AOP(IC_RESULT(ic))) == PAIR_HL) { - /* Fetch into HL then do the add */ - spillPair(PAIR_HL); - fetchPair(PAIR_HL, AOP(IC_LEFT(ic))); - emitcode("add", "hl,%s", getPairName(AOP(IC_RIGHT(ic)))); - goto release; - } - - /* Special case: - ld hl,sp+n trashes C so we cant afford to do it during an - add with stack based varibles. Worst case is: - ld hl,sp+left - ld a,(hl) - ld hl,sp+right - add (hl) - ld hl,sp+result - ld (hl),a - ld hl,sp+left+1 - ld a,(hl) - ld hl,sp+right+1 - adc (hl) - ld hl,sp+result+1 - ld (hl),a - So you cant afford to load up hl if either left, right, or result - is on the stack (*sigh*) The alt is: - ld hl,sp+left - ld de,(hl) - ld hl,sp+right - ld hl,(hl) - add hl,de - ld hl,sp+result - ld (hl),hl - Combinations in here are: - * If left or right are in bc then the loss is small - trap later - * If the result is in bc then the loss is also small - */ - if (IS_GB) { - if (AOP_TYPE(IC_LEFT(ic)) == AOP_STK || - AOP_TYPE(IC_RIGHT(ic)) == AOP_STK || - AOP_TYPE(IC_RESULT(ic)) == AOP_STK) { - if ((AOP_SIZE(IC_LEFT(ic)) == 2 || - AOP_SIZE(IC_RIGHT(ic)) == 2) && - (AOP_SIZE(IC_LEFT(ic)) <= 2 && - AOP_SIZE(IC_RIGHT(ic)) <= 2)) { - if (getPairId(AOP(IC_RIGHT(ic))) == PAIR_BC) { - /* Swap left and right */ - operand *t = IC_RIGHT(ic); - IC_RIGHT(ic) = IC_LEFT(ic); - IC_LEFT(ic) = t; - } - if (getPairId(AOP(IC_LEFT(ic))) == PAIR_BC) { - fetchPair(PAIR_HL, AOP(IC_RIGHT(ic))); - emit2("add hl,bc"); - } - else { - fetchPair(PAIR_DE, AOP(IC_LEFT(ic))); - fetchPair(PAIR_HL, AOP(IC_RIGHT(ic))); - emit2("add hl,de"); - } - commitPair(AOP(IC_RESULT(ic)), PAIR_HL); + /* if both left & right are in bit + space */ + if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY && + AOP_TYPE (IC_RIGHT (ic)) == AOP_CRY) + { + /* Cant happen */ + wassertl (0, "Tried to add two bits"); + } + + /* if left in bit space & right literal */ + if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY && + AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT) + { + /* Can happen I guess */ + wassertl (0, "Tried to add a bit to a literal"); + } + + /* if I can do an increment instead + of add then GOOD for ME */ + if (genPlusIncr (ic) == TRUE) goto release; - } - else if (size == 4) { - emit2("; WARNING: This add is probably broken.\n"); - } - } + + emitDebug ("; Can't optimise plus by inc, falling back to the normal way"); + + size = getDataSize (IC_RESULT (ic)); + + /* Special case when left and right are constant */ + if (isPair (AOP (IC_RESULT (ic)))) + { + char *left, *right; + left = aopGetLitWordLong (AOP (IC_LEFT (ic)), 0, FALSE); + right = aopGetLitWordLong (AOP (IC_RIGHT (ic)), 0, FALSE); + + if (AOP_TYPE(IC_LEFT(ic)) == AOP_LIT && AOP_TYPE(IC_RIGHT(ic)) == AOP_LIT && + left && right) + { + /* It's a pair */ + /* PENDING: fix */ + char buffer[100]; + sprintf (buffer, "#(%s + %s)", left, right); + emit2 ("ld %s,%s", getPairName (AOP (IC_RESULT (ic))), buffer); + goto release; + } } - while(size--) { - if (AOP_TYPE(IC_LEFT(ic)) == AOP_ACC) { - MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE)); - if(offset == 0) - emit2("add a,%s", - aopGet(AOP(IC_RIGHT(ic)),offset,FALSE)); + if ((isPair (AOP (IC_RIGHT (ic))) || isPair (AOP (IC_LEFT (ic)))) && getPairId (AOP (IC_RESULT (ic))) == PAIR_HL) + { + /* Fetch into HL then do the add */ + PAIR_ID left = getPairId (AOP (IC_LEFT (ic))); + PAIR_ID right = getPairId (AOP (IC_RIGHT (ic))); + + spillPair (PAIR_HL); + + if (left == PAIR_HL && right != PAIR_INVALID) + { + emit2 ("add hl,%s", _pairs[right].name); + goto release; + } + else if (right == PAIR_HL && left != PAIR_INVALID) + { + emit2 ("add hl,%s", _pairs[left].name); + goto release; + } + else if (right != PAIR_INVALID && right != PAIR_HL) + { + fetchPair (PAIR_HL, AOP (IC_LEFT (ic))); + emit2 ("add hl,%s", getPairName (AOP (IC_RIGHT (ic)))); + goto release; + } + else if (left != PAIR_INVALID && left != PAIR_HL) + { + fetchPair (PAIR_HL, AOP (IC_RIGHT (ic))); + emit2 ("add hl,%s", getPairName (AOP (IC_LEFT (ic)))); + goto release; + } else - emit2("adc a,%s", - aopGet(AOP(IC_RIGHT(ic)),offset,FALSE)); - } else { - MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE)); - if(offset == 0) - emit2("add a,%s", - aopGet(AOP(IC_RIGHT(ic)),offset,FALSE)); + { + /* Can't do it */ + } + } + + if (isPair (AOP (IC_RIGHT (ic))) && AOP_TYPE (IC_LEFT (ic)) == AOP_IMMD && getPairId (AOP (IC_RIGHT (ic))) != PAIR_HL) + { + fetchPair (PAIR_HL, AOP (IC_LEFT (ic))); + emit2 ("add hl,%s", getPairName (AOP (IC_RIGHT (ic)))); + spillCached(); + commitPair ( AOP (IC_RESULT (ic)), PAIR_HL); + goto release; + } + + /* Special case: + ld hl,sp+n trashes C so we can't afford to do it during an + add with stack based variables. Worst case is: + ld hl,sp+left + ld a,(hl) + ld hl,sp+right + add (hl) + ld hl,sp+result + ld (hl),a + ld hl,sp+left+1 + ld a,(hl) + ld hl,sp+right+1 + adc (hl) + ld hl,sp+result+1 + ld (hl),a + So you can't afford to load up hl if either left, right, or result + is on the stack (*sigh*) The alt is: + ld hl,sp+left + ld de,(hl) + ld hl,sp+right + ld hl,(hl) + add hl,de + ld hl,sp+result + ld (hl),hl + Combinations in here are: + * If left or right are in bc then the loss is small - trap later + * If the result is in bc then the loss is also small + */ + if (IS_GB) + { + if (AOP_TYPE (IC_LEFT (ic)) == AOP_STK || + AOP_TYPE (IC_RIGHT (ic)) == AOP_STK || + AOP_TYPE (IC_RESULT (ic)) == AOP_STK) + { + if ((AOP_SIZE (IC_LEFT (ic)) == 2 || + AOP_SIZE (IC_RIGHT (ic)) == 2) && + (AOP_SIZE (IC_LEFT (ic)) <= 2 && + AOP_SIZE (IC_RIGHT (ic)) <= 2)) + { + if (getPairId (AOP (IC_RIGHT (ic))) == PAIR_BC) + { + /* Swap left and right */ + operand *t = IC_RIGHT (ic); + IC_RIGHT (ic) = IC_LEFT (ic); + IC_LEFT (ic) = t; + } + if (getPairId (AOP (IC_LEFT (ic))) == PAIR_BC) + { + fetchPair (PAIR_HL, AOP (IC_RIGHT (ic))); + emit2 ("add hl,bc"); + } + else + { + fetchPair (PAIR_DE, AOP (IC_LEFT (ic))); + fetchPair (PAIR_HL, AOP (IC_RIGHT (ic))); + emit2 ("add hl,de"); + } + commitPair (AOP (IC_RESULT (ic)), PAIR_HL); + goto release; + } + } + if (size == 4) + { + /* Be paranoid on the GB with 4 byte variables due to how C + can be trashed by lda hl,n(sp). + */ + _gbz80_emitAddSubLong (ic, TRUE); + goto release; + } + } + + setupToPreserveCarry (ic); + + while (size--) + { + if (AOP_TYPE (IC_LEFT (ic)) == AOP_ACC) + { + _moveA (aopGet (AOP (IC_LEFT (ic)), offset, FALSE)); + if (offset == 0) + emit2 ("add a,%s", + aopGet (AOP (IC_RIGHT (ic)), offset, FALSE)); + else + emit2 ("adc a,%s", + aopGet (AOP (IC_RIGHT (ic)), offset, FALSE)); + } else - emit2("adc a,%s", - aopGet(AOP(IC_RIGHT(ic)),offset,FALSE)); - } - aopPut(AOP(IC_RESULT(ic)),"a",offset++); + { + _moveA (aopGet (AOP (IC_LEFT (ic)), offset, FALSE)); + if (offset == 0) + emit2 ("add a,%s", + aopGet (AOP (IC_RIGHT (ic)), offset, FALSE)); + else + emit2 ("adc a,%s", + aopGet (AOP (IC_RIGHT (ic)), offset, FALSE)); + } + aopPut (AOP (IC_RESULT (ic)), "a", offset++); } release: - freeAsmop(IC_LEFT(ic),NULL,ic); - freeAsmop(IC_RIGHT(ic),NULL,ic); - freeAsmop(IC_RESULT(ic),NULL,ic); - + _G.preserveCarry = FALSE; + freeAsmop (IC_LEFT (ic), NULL, ic); + freeAsmop (IC_RIGHT (ic), NULL, ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ /* genMinusDec :- does subtraction with deccrement if possible */ /*-----------------------------------------------------------------*/ -static bool genMinusDec (iCode *ic) +static bool +genMinusDec (iCode * ic) { - unsigned int icount ; - unsigned int size = getDataSize(IC_RESULT(ic)); + unsigned int icount; + unsigned int size = getDataSize (IC_RESULT (ic)); - /* will try to generate an increment */ - /* if the right side is not a literal we cannot */ - if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT) - return FALSE ; + /* will try to generate an increment */ + /* if the right side is not a literal we cannot */ + if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT) + return FALSE; - /* if the literal value of the right hand side - is greater than 4 then it is not worth it */ - if ((icount = (unsigned int) floatFromVal (AOP(IC_RIGHT(ic))->aopu.aop_lit)) > 2) - return FALSE; + /* if the literal value of the right hand side + is greater than 4 then it is not worth it */ + if ((icount = (unsigned int) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit)) > 2) + return FALSE; - size = getDataSize(IC_RESULT(ic)); + size = getDataSize (IC_RESULT (ic)); -#if 0 - /* if increment 16 bits in register */ - if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) && - (size > 1) && - (icount == 1)) { - symbol *tlbl = newiTempLabel(NULL); - emitcode("dec","%s",aopGet(AOP(IC_RESULT(ic)),LSB,FALSE)); - emitcode("jp", "np," LABEL_STR ,tlbl->key+100); - - emitcode("dec","%s",aopGet(AOP(IC_RESULT(ic)),MSB16,FALSE)); - if(size == 4) { - wassert(0); - } - emitLabel(tlbl->key+100); - return TRUE; + /* if decrement 16 bits in register */ + if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))) && + (size > 1) && isPair (AOP (IC_RESULT (ic)))) + { + while (icount--) + emit2 ("dec %s", getPairName (AOP (IC_RESULT (ic)))); + return TRUE; } -#endif - /* if decrement 16 bits in register */ - if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic))) && - (size > 1) && isPair(AOP(IC_RESULT(ic)))) { - while (icount--) - emitcode("dec", "%s", getPairName(AOP(IC_RESULT(ic)))); - return TRUE; + /* If result is a pair */ + if (isPair (AOP (IC_RESULT (ic)))) + { + movLeft2ResultLong (IC_LEFT (ic), 0, IC_RESULT (ic), 0, 0, 2); + while (icount--) + emit2 ("dec %s", getPairName (AOP (IC_RESULT (ic)))); + return TRUE; } - /* If result is a pair */ - if (isPair(AOP(IC_RESULT(ic)))) { - movLeft2Result(IC_LEFT(ic), 0, IC_RESULT(ic), 0, 0); - movLeft2Result(IC_LEFT(ic), 1, IC_RESULT(ic), 1, 0); - while (icount--) - emitcode("dec", "%s", getPairName(AOP(IC_RESULT(ic)))); - return TRUE; + /* if increment 16 bits in register */ + if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic))) && + (size == 2) + ) + { + fetchPair (_getTempPairId(), AOP (IC_RESULT (ic))); + + while (icount--) { + emit2 ("dec %s", _getTempPairName()); + } + + commitPair (AOP (IC_RESULT (ic)), _getTempPairId()); + + return TRUE; } - /* if the sizes are greater than 1 then we cannot */ - if (AOP_SIZE(IC_RESULT(ic)) > 1 || - AOP_SIZE(IC_LEFT(ic)) > 1 ) - return FALSE ; - /* we can if the aops of the left & result match or if they are in - registers and the registers are the same */ - if (sameRegs(AOP(IC_LEFT(ic)), AOP(IC_RESULT(ic)))) { - while (icount--) - emitcode ("dec","%s",aopGet(AOP(IC_RESULT(ic)),0,FALSE)); - return TRUE ; + /* if the sizes are greater than 1 then we cannot */ + if (AOP_SIZE (IC_RESULT (ic)) > 1 || + AOP_SIZE (IC_LEFT (ic)) > 1) + return FALSE; + + /* we can if the aops of the left & result match or if they are in + registers and the registers are the same */ + if (sameRegs (AOP (IC_LEFT (ic)), AOP (IC_RESULT (ic)))) + { + while (icount--) + emit2 ("dec %s", aopGet (AOP (IC_RESULT (ic)), 0, FALSE)); + return TRUE; } - return FALSE ; + return FALSE; } /*-----------------------------------------------------------------*/ /* genMinus - generates code for subtraction */ /*-----------------------------------------------------------------*/ -static void genMinus (iCode *ic) +static void +genMinus (iCode * ic) { - int size, offset = 0; - unsigned long lit = 0L; + int size, offset = 0; + unsigned long lit = 0L; - aopOp (IC_LEFT(ic),ic,FALSE, FALSE); - aopOp (IC_RIGHT(ic),ic,FALSE, FALSE); - aopOp (IC_RESULT(ic),ic,TRUE, FALSE); + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + aopOp (IC_RIGHT (ic), ic, FALSE, FALSE); + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); - /* special cases :- */ - /* if both left & right are in bit space */ - if (AOP_TYPE(IC_LEFT(ic)) == AOP_CRY && - AOP_TYPE(IC_RIGHT(ic)) == AOP_CRY) { - wassert(0); - goto release ; + /* special cases :- */ + /* if both left & right are in bit space */ + if (AOP_TYPE (IC_LEFT (ic)) == AOP_CRY && + AOP_TYPE (IC_RIGHT (ic)) == AOP_CRY) + { + wassertl (0, "Tried to subtract two bits"); + goto release; } - /* if I can do an decrement instead of subtract then GOOD for ME */ - if (genMinusDec (ic) == TRUE) - goto release; + /* if I can do an decrement instead of subtract then GOOD for ME */ + if (genMinusDec (ic) == TRUE) + goto release; - size = getDataSize(IC_RESULT(ic)); + size = getDataSize (IC_RESULT (ic)); - if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT){ + if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT) + { } - else{ - lit = (unsigned long)floatFromVal(AOP(IC_RIGHT(ic))->aopu.aop_lit); - lit = - (long)lit; + else + { + lit = (unsigned long) floatFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit); + lit = -(long) lit; } - /* Same logic as genPlus */ - if (IS_GB) { - if (AOP_TYPE(IC_LEFT(ic)) == AOP_STK || - AOP_TYPE(IC_RIGHT(ic)) == AOP_STK || - AOP_TYPE(IC_RESULT(ic)) == AOP_STK) { - if ((AOP_SIZE(IC_LEFT(ic)) == 2 || - AOP_SIZE(IC_RIGHT(ic)) == 2) && - (AOP_SIZE(IC_LEFT(ic)) <= 2 && - AOP_SIZE(IC_RIGHT(ic)) <= 2)) { - PAIR_ID left = getPairId(AOP(IC_LEFT(ic))); - PAIR_ID right = getPairId(AOP(IC_RIGHT(ic))); - - if (left == PAIR_INVALID && right == PAIR_INVALID) { - left = PAIR_DE; - right = PAIR_HL; + /* Same logic as genPlus */ + if (IS_GB) + { + if (AOP_TYPE (IC_LEFT (ic)) == AOP_STK || + AOP_TYPE (IC_RIGHT (ic)) == AOP_STK || + AOP_TYPE (IC_RESULT (ic)) == AOP_STK) + { + if ((AOP_SIZE (IC_LEFT (ic)) == 2 || + AOP_SIZE (IC_RIGHT (ic)) == 2) && + (AOP_SIZE (IC_LEFT (ic)) <= 2 && + AOP_SIZE (IC_RIGHT (ic)) <= 2)) + { + PAIR_ID left = getPairId (AOP (IC_LEFT (ic))); + PAIR_ID right = getPairId (AOP (IC_RIGHT (ic))); + + if (left == PAIR_INVALID && right == PAIR_INVALID) + { + left = PAIR_DE; + right = PAIR_HL; + } + else if (right == PAIR_INVALID) + right = PAIR_DE; + else if (left == PAIR_INVALID) + left = PAIR_DE; + + fetchPair (left, AOP (IC_LEFT (ic))); + /* Order is important. Right may be HL */ + fetchPair (right, AOP (IC_RIGHT (ic))); + + emit2 ("ld a,%s", _pairs[left].l); + emit2 ("sub a,%s", _pairs[right].l); + emit2 ("ld e,a"); + emit2 ("ld a,%s", _pairs[left].h); + emit2 ("sbc a,%s", _pairs[right].h); + + if ( AOP_SIZE (IC_RESULT (ic)) > 1) + { + aopPut (AOP (IC_RESULT (ic)), "a", 1); + } + aopPut (AOP (IC_RESULT (ic)), "e", 0); + goto release; + } + } + if (size == 4) + { + /* Be paranoid on the GB with 4 byte variables due to how C + can be trashed by lda hl,n(sp). + */ + _gbz80_emitAddSubLong (ic, FALSE); + goto release; + } } - else if (right == PAIR_INVALID) - right = PAIR_DE; - else if (left == PAIR_INVALID) - left = PAIR_DE; - - fetchPair(left, AOP(IC_LEFT(ic))); - /* Order is important. Right may be HL */ - fetchPair(right, AOP(IC_RIGHT(ic))); - emit2("ld a,%s", _pairs[left].l); - emit2("sub a,%s", _pairs[right].l); - emit2("ld e,a"); - emit2("ld a,%s", _pairs[left].h); - emit2("sbc a,%s", _pairs[right].h); + setupToPreserveCarry (ic); - aopPut(AOP(IC_RESULT(ic)), "a", 1); - aopPut(AOP(IC_RESULT(ic)), "e", 0); - goto release; - } - else if (size == 4) { - emit2("; WARNING: This sub is probably broken.\n"); - } - } - } - - /* if literal, add a,#-lit, else normal subb */ - while (size--) { - MOVA(aopGet(AOP(IC_LEFT(ic)),offset,FALSE)); - if (AOP_TYPE(IC_RIGHT(ic)) != AOP_LIT) { - if (!offset) - emitcode("sub","a,%s", - aopGet(AOP(IC_RIGHT(ic)),offset,FALSE)); - else - emitcode("sbc","a,%s", - aopGet(AOP(IC_RIGHT(ic)),offset,FALSE)); - } - else{ - /* first add without previous c */ - if (!offset) - emit2("add a,!immedbyte", (unsigned int)(lit & 0x0FFL)); + /* if literal, add a,#-lit, else normal subb */ + while (size--) + { + _moveA (aopGet (AOP (IC_LEFT (ic)), offset, FALSE)); + if (AOP_TYPE (IC_RIGHT (ic)) != AOP_LIT) + { + if (!offset) + emit2 ("sub a,%s", + aopGet (AOP (IC_RIGHT (ic)), offset, FALSE)); + else + emit2 ("sbc a,%s", + aopGet (AOP (IC_RIGHT (ic)), offset, FALSE)); + } else - emit2("adc a,!immedbyte", (unsigned int)((lit >> (offset*8)) & 0x0FFL)); - } - aopPut(AOP(IC_RESULT(ic)),"a",offset++); + { + /* first add without previous c */ + if (!offset) + emit2 ("add a,!immedbyte", (unsigned int) (lit & 0x0FFL)); + else + emit2 ("adc a,!immedbyte", (unsigned int) ((lit >> (offset * 8)) & 0x0FFL)); + } + aopPut (AOP (IC_RESULT (ic)), "a", offset++); } - if (AOP_SIZE(IC_RESULT(ic)) == 3 && - AOP_SIZE(IC_LEFT(ic)) == 3 && - !sameRegs(AOP(IC_RESULT(ic)),AOP(IC_LEFT(ic)))) - wassert(0); + if (AOP_SIZE (IC_RESULT (ic)) == 3 && + AOP_SIZE (IC_LEFT (ic)) == 3 && + !sameRegs (AOP (IC_RESULT (ic)), AOP (IC_LEFT (ic)))) + { + wassertl (0, "Tried to subtract on a long pointer"); + } release: - freeAsmop(IC_LEFT(ic),NULL,ic); - freeAsmop(IC_RIGHT(ic),NULL,ic); - freeAsmop(IC_RESULT(ic),NULL,ic); + _G.preserveCarry = FALSE; + freeAsmop (IC_LEFT (ic), NULL, ic); + freeAsmop (IC_RIGHT (ic), NULL, ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ /* genMult - generates code for multiplication */ /*-----------------------------------------------------------------*/ -static void genMult (iCode *ic) +static void +genMult (iCode * ic) { - /* Shouldn't occur - all done through function calls */ - wassert(0); + int val; + int count, i; + /* If true then the final operation should be a subtract */ + bool active = FALSE; + bool byteResult; + + /* Shouldn't occur - all done through function calls */ + aopOp (IC_LEFT (ic), ic, FALSE, FALSE); + aopOp (IC_RIGHT (ic), ic, FALSE, FALSE); + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); + + byteResult = (AOP_SIZE (IC_RESULT (ic)) == 1); + + if (AOP_SIZE (IC_LEFT (ic)) > 2 || + AOP_SIZE (IC_RIGHT (ic)) > 2 || + AOP_SIZE (IC_RESULT (ic)) > 2) + { + wassertl (0, "Multiplication is handled through support function calls"); + } + + /* Swap left and right such that right is a literal */ + if ((AOP_TYPE (IC_LEFT (ic)) == AOP_LIT)) + { + operand *t = IC_RIGHT (ic); + IC_RIGHT (ic) = IC_LEFT (ic); + IC_LEFT (ic) = t; + } + + wassertl (AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT, "Right must be a literal"); + + val = (int)floatFromVal ( AOP (IC_RIGHT (ic))->aopu.aop_lit); + // wassertl (val > 0, "Multiply must be positive"); + wassertl (val != 1, "Can't multiply by 1"); + + if (IS_Z80 && isPairInUseNotInRet (PAIR_DE, ic)) { + _push (PAIR_DE); + _G.stack.pushedDE = TRUE; + } + + if ( AOP_SIZE (IC_LEFT (ic)) == 1 && !SPEC_USIGN (getSpec (operandType ( IC_LEFT (ic))))) + { + emit2 ("ld e,%s", aopGet (AOP (IC_LEFT (ic)), LSB, FALSE)); + if (!byteResult) + { + emit2 ("ld a,e"); + emit2 ("rlc a"); + emit2 ("sbc a,a"); + emit2 ("ld d,a"); + } + } + else + { + fetchPair (PAIR_DE, AOP (IC_LEFT (ic))); + } + + i = val; + + /* Fully unroled version of mul.s. Not the most efficient. + */ + for (count = 0; count < 16; count++) + { + if (count != 0 && active) + { + emit2 ("add hl,hl"); + } + if (i & 0x8000U) + { + if (active == FALSE) + { + emit2 ("ld l,e"); + if (!byteResult) + emit2 ("ld h,d"); + } + else + { + emit2 ("add hl,de"); + } + active = TRUE; + } + i <<= 1; + } + + spillCached(); + + if (IS_Z80 && _G.stack.pushedDE) + { + _pop (PAIR_DE); + _G.stack.pushedDE = FALSE; + } + + if (byteResult) + aopPut (AOP (IC_RESULT (ic)), _pairs[PAIR_HL].l, 0); + else + commitPair ( AOP (IC_RESULT (ic)), PAIR_HL); + + freeAsmop (IC_LEFT (ic), NULL, ic); + freeAsmop (IC_RIGHT (ic), NULL, ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ /* genDiv - generates code for division */ /*-----------------------------------------------------------------*/ -static void genDiv (iCode *ic) +static void +genDiv (iCode * ic) { - /* Shouldn't occur - all done through function calls */ - wassert(0); + /* Shouldn't occur - all done through function calls */ + wassertl (0, "Division is handled through support function calls"); } /*-----------------------------------------------------------------*/ /* genMod - generates code for division */ /*-----------------------------------------------------------------*/ -static void genMod (iCode *ic) +static void +genMod (iCode * ic) { - /* Shouldn't occur - all done through function calls */ - wassert(0); + /* Shouldn't occur - all done through function calls */ + wassert (0); } /*-----------------------------------------------------------------*/ /* genIfxJump :- will create a jump depending on the ifx */ /*-----------------------------------------------------------------*/ -static void genIfxJump (iCode *ic, char *jval) +static void +genIfxJump (iCode * ic, char *jval) { - symbol *jlbl ; - const char *inst; + symbol *jlbl; + const char *inst; - /* if true label then we jump if condition - supplied is true */ - if (IC_TRUE(ic)) { - jlbl = IC_TRUE(ic); - if (!strcmp(jval, "a")) { - inst = "nz"; - } - else if (!strcmp(jval, "c")) { - inst = "c"; - } - else if (!strcmp(jval, "nc")) { - inst = "nc"; - } - else { - /* The buffer contains the bit on A that we should test */ - inst = "nz"; - } + /* if true label then we jump if condition + supplied is true */ + if (IC_TRUE (ic)) + { + jlbl = IC_TRUE (ic); + if (!strcmp (jval, "a")) + { + inst = "NZ"; + } + else if (!strcmp (jval, "c")) + { + inst = "C"; + } + else if (!strcmp (jval, "nc")) + { + inst = "NC"; + } + else if (!strcmp (jval, "m")) + { + inst = "M"; + } + else if (!strcmp (jval, "p")) + { + inst = "P"; + } + else + { + /* The buffer contains the bit on A that we should test */ + inst = "NZ"; + } } - else { - /* false label is present */ - jlbl = IC_FALSE(ic) ; - if (!strcmp(jval, "a")) { - inst = "z"; - } - else if (!strcmp(jval, "c")) { - inst = "nc"; - } - else if (!strcmp(jval, "nc")) { - inst = "c"; - } - else { - /* The buffer contains the bit on A that we should test */ - inst = "z"; - } + else + { + /* false label is present */ + jlbl = IC_FALSE (ic); + if (!strcmp (jval, "a")) + { + inst = "Z"; + } + else if (!strcmp (jval, "c")) + { + inst = "NC"; + } + else if (!strcmp (jval, "nc")) + { + inst = "C"; + } + else if (!strcmp (jval, "m")) + { + inst = "P"; + } + else if (!strcmp (jval, "p")) + { + inst = "M"; + } + else + { + /* The buffer contains the bit on A that we should test */ + inst = "Z"; + } + } + /* Z80 can do a conditional long jump */ + if (!strcmp (jval, "a")) + { + emit2 ("or a,a"); + } + else if (!strcmp (jval, "c")) + { } - /* Z80 can do a conditional long jump */ - if (!strcmp(jval, "a")) { - emitcode("or", "a,a"); + else if (!strcmp (jval, "nc")) + { } - else if (!strcmp(jval, "c")) { + else if (!strcmp (jval, "m")) + { } - else if (!strcmp(jval, "nc")) { + else if (!strcmp (jval, "p")) + { } - else { - emitcode("bit", "%s,a", jval); + else + { + emit2 ("bit %s,a", jval); } - emit2("jp %s,!tlabel", inst, jlbl->key+100); + emit2 ("jp %s,!tlabel", inst, jlbl->key + 100); - /* mark the icode as generated */ - ic->generated = 1; + /* mark the icode as generated */ + ic->generated = 1; } -static const char *_getPairIdName(PAIR_ID id) +#if DISABLED +static const char * +_getPairIdName (PAIR_ID id) { - return _pairs[id].name; + return _pairs[id].name; } +#endif -/** Generic compare for > or < - */ -static void genCmp (operand *left,operand *right, - operand *result, iCode *ifx, int sign) -{ - int size, offset = 0 ; - unsigned long lit = 0L; - bool swap_sense = FALSE; - - /* if left & right are bit variables */ - if (AOP_TYPE(left) == AOP_CRY && - AOP_TYPE(right) == AOP_CRY ) { - /* Cant happen on the Z80 */ - wassert(0); - } else { - /* subtract right from left if at the - end the carry flag is set then we know that - left is greater than right */ - size = max(AOP_SIZE(left),AOP_SIZE(right)); - - /* if unsigned char cmp with lit, just compare */ - if((size == 1) && - (AOP_TYPE(right) == AOP_LIT && AOP_TYPE(left) != AOP_DIR )){ - emitcode("ld", "a,%s", aopGet(AOP(left), offset, FALSE)); - if (sign) { - emit2("xor a,!immedbyte", 0x80); - emit2("cp %s^!constbyte", aopGet(AOP(right), offset, FALSE), 0x80); - } - else - emitcode("cp", "%s", aopGet(AOP(right), offset, FALSE)); +#if OLD + /* if unsigned char cmp with lit, just compare */ + if ((size == 1) && + (AOP_TYPE (right) == AOP_LIT && AOP_TYPE (left) != AOP_DIR)) + { + emit2 ("ld a,%s", aopGet (AOP (left), offset, FALSE)); + if (sign) + { + emit2 ("xor a,!immedbyte", 0x80); + emit2 ("cp %s^!constbyte", aopGet (AOP (right), offset, FALSE), 0x80); + } + else + emit2 ("cp %s", aopGet (AOP (right), offset, FALSE)); } - else { - /* Special cases: - On the GB: - If the left or the right is a lit: - Load -lit into HL, add to right via, check sense. - */ - if (size == 2 && (AOP_TYPE(right) == AOP_LIT || AOP_TYPE(left) == AOP_LIT)) { - PAIR_ID id = PAIR_DE; - asmop *lit = AOP(right); - asmop *op = AOP(left); - swap_sense = TRUE; - - if (AOP_TYPE(left) == AOP_LIT) { - swap_sense = FALSE; - lit = AOP(left); - op = AOP(right); - } - if (sign) { - emit2("ld e,%s", aopGet(op, 0, 0)); - emit2("ld a,%s", aopGet(op, 1, 0)); - emit2("xor a,!immedbyte", 0x80); - emit2("ld d,a"); - } - else { - id = getPairId(op); - if (id == PAIR_INVALID) { - fetchPair(PAIR_DE, op); - id = PAIR_DE; + else if (size == 4 && IS_GB && requiresHL(AOP(right)) && requiresHL(AOP(left))) + { + // On the Gameboy we can't afford to adjust HL as it may trash the carry. + // Pull left into DE and right into HL + aopGet (AOP(left), LSB, FALSE); + emit2 ("ld d,h"); + emit2 ("ld e,l"); + aopGet (AOP(right), LSB, FALSE); + + while (size--) + { + if (size == 0 && sign) + { + // Highest byte when signed needs the bits flipped + // Save the flags + emit2 ("push af"); + emit2 ("ld a,(de)"); + emit2 ("xor !immedbyte", 0x80); + emit2 ("ld e,a"); + emit2 ("ld a,(hl)"); + emit2 ("xor !immedbyte", 0x80); + emit2 ("ld d,a"); + emit2 ("pop af"); + emit2 ("ld a,e"); + emit2 ("%s a,d", offset == 0 ? "sub" : "sbc"); + } + else + { + emit2 ("ld a,(de)"); + emit2 ("%s a,(hl)", offset == 0 ? "sub" : "sbc"); + } + + if (size != 0) + { + emit2 ("inc hl"); + emit2 ("inc de"); + } + offset++; + } + spillPair (PAIR_HL); } - } - spillPair(PAIR_HL); - emit2("ld hl,%s", fetchLitSpecial(lit, TRUE, sign)); - emit2("add hl,%s", _getPairIdName(id)); - goto release; - } - if(AOP_TYPE(right) == AOP_LIT) { - lit = (unsigned long)floatFromVal(AOP(right)->aopu.aop_lit); - /* optimize if(x < 0) or if(x >= 0) */ - if (lit == 0L){ - if (!sign) { - /* No sign so it's always false */ - CLRC; + else if (size == 4 && IS_Z80 && couldDestroyCarry(AOP(right)) && couldDestroyCarry(AOP(left))) + { + setupPair (PAIR_HL, AOP (left), 0); + aopGet (AOP(right), LSB, FALSE); + + while (size--) + { + if (size == 0 && sign) + { + // Highest byte when signed needs the bits flipped + // Save the flags + emit2 ("push af"); + emit2 ("ld a,(hl)"); + emit2 ("xor !immedbyte", 0x80); + emit2 ("ld l,a"); + emit2 ("ld a,%d(iy)", offset); + emit2 ("xor !immedbyte", 0x80); + emit2 ("ld h,a"); + emit2 ("pop af"); + emit2 ("ld a,l"); + emit2 ("%s a,h", offset == 0 ? "sub" : "sbc"); + } + else + { + emit2 ("ld a,(hl)"); + emit2 ("%s a,%d(iy)", offset == 0 ? "sub" : "sbc", offset); + } + + if (size != 0) + { + emit2 ("inc hl"); + } + offset++; + } + spillPair (PAIR_HL); + spillPair (PAIR_IY); + } + else + { + if (AOP_TYPE (right) == AOP_LIT) + { + lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit); + /* optimize if(x < 0) or if(x >= 0) */ + if (lit == 0L) + { + if (!sign) + { + /* No sign so it's always false */ + _clearCarry(); } - else{ - /* Just load in the top most bit */ - MOVA(aopGet(AOP(left),AOP_SIZE(left)-1,FALSE)); - if(!(AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)) && ifx) { - genIfxJump (ifx,"7"); - return; + else + { + /* Just load in the top most bit */ + _moveA (aopGet (AOP (left), AOP_SIZE (left) - 1, FALSE)); + if (!(AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result)) && ifx) + { + genIfxJump (ifx, "7"); + return; } - else - emitcode("rlc","a"); + else + emit2 ("rlc a"); } - goto release; + goto release; } } - if (sign) { - /* First setup h and l contaning the top most bytes XORed */ - bool fDidXor = FALSE; - if (AOP_TYPE(left) == AOP_LIT){ - unsigned long lit = (unsigned long) - floatFromVal(AOP(left)->aopu.aop_lit); - emit2("ld %s,!immedbyte", _fTmp[0], - 0x80 ^ (unsigned int)((lit >> ((size-1)*8)) & 0x0FFL)); - } - else { - emitcode("ld", "a,%s", aopGet(AOP(left), size-1, FALSE)); - emit2("xor a,!immedbyte", 0x80); - emitcode("ld", "%s,a", _fTmp[0]); - fDidXor = TRUE; - } - if (AOP_TYPE(right) == AOP_LIT) { - unsigned long lit = (unsigned long) - floatFromVal(AOP(right)->aopu.aop_lit); - emit2("ld %s,!immedbyte", _fTmp[1], - 0x80 ^ (unsigned int)((lit >> ((size-1)*8)) & 0x0FFL)); - } - else { - emitcode("ld", "a,%s", aopGet(AOP(right), size-1, FALSE)); - emit2("xor a,!immedbyte", 0x80); - emitcode("ld", "%s,a", _fTmp[1]); - fDidXor = TRUE; - } - if (!fDidXor) - CLRC; - } - else { - CLRC; - } - while (size--) { - /* Do a long subtract */ - if (!sign || size ) { - MOVA(aopGet(AOP(left),offset,FALSE)); - } - if (sign && size == 0) { - emitcode("ld", "a,%s", _fTmp[0]); - emitcode("sbc", "a,%s", _fTmp[1]); - } - else { - /* Subtract through, propagating the carry */ - emitcode("sbc","a,%s ; 2",aopGet(AOP(right),offset++,FALSE)); - } + + if (sign) + { + /* First setup h and l contaning the top most bytes XORed */ + bool fDidXor = FALSE; + if (AOP_TYPE (left) == AOP_LIT) + { + unsigned long lit = (unsigned long) + floatFromVal (AOP (left)->aopu.aop_lit); + emit2 ("ld %s,!immedbyte", _fTmp[0], + 0x80 ^ (unsigned int) ((lit >> ((size - 1) * 8)) & 0x0FFL)); + } + else + { + emit2 ("ld a,%s", aopGet (AOP (left), size - 1, FALSE)); + emit2 ("xor a,!immedbyte", 0x80); + emit2 ("ld %s,a", _fTmp[0]); + fDidXor = TRUE; + } + if (AOP_TYPE (right) == AOP_LIT) + { + unsigned long lit = (unsigned long) + floatFromVal (AOP (right)->aopu.aop_lit); + emit2 ("ld %s,!immedbyte", _fTmp[1], + 0x80 ^ (unsigned int) ((lit >> ((size - 1) * 8)) & 0x0FFL)); + } + else + { + emit2 ("ld a,%s", aopGet (AOP (right), size - 1, FALSE)); + emit2 ("xor a,!immedbyte", 0x80); + emit2 ("ld %s,a", _fTmp[1]); + fDidXor = TRUE; + } + } + while (size--) + { + /* Do a long subtract */ + if (!sign || size) + { + _moveA (aopGet (AOP (left), offset, FALSE)); + } + if (sign && size == 0) + { + emit2 ("ld a,%s", _fTmp[0]); + emit2 ("%s a,%s", offset == 0 ? "sub" : "sbc", _fTmp[1]); + } + else + { + /* Subtract through, propagating the carry */ + emit2 ("%s a,%s", offset == 0 ? "sub" : "sbc", aopGet (AOP (right), offset, FALSE)); + offset++; + } } } } +#endif -release: - if (AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)) { - outBitCLong(result, swap_sense); - } else { - /* if the result is used in the next - ifx conditional branch then generate - code a little differently */ - if (ifx) - genIfxJump(ifx, swap_sense ? "nc" : "c"); - else - outBitCLong(result, swap_sense); - /* leave the result in acc */ - } -} - -/*-----------------------------------------------------------------*/ -/* genCmpGt :- greater than comparison */ -/*-----------------------------------------------------------------*/ -static void genCmpGt (iCode *ic, iCode *ifx) +/** Generic compare for > or < + */ +static void +genCmp (operand * left, operand * right, + operand * result, iCode * ifx, int sign) { - operand *left, *right, *result; - sym_link *letype , *retype; - int sign ; + int size, offset = 0; + unsigned long lit = 0L; + bool swap_sense = FALSE; - left = IC_LEFT(ic); - right= IC_RIGHT(ic); - result = IC_RESULT(ic); + /* if left & right are bit variables */ + if (AOP_TYPE (left) == AOP_CRY && + AOP_TYPE (right) == AOP_CRY) + { + /* Cant happen on the Z80 */ + wassertl (0, "Tried to compare two bits"); + } + else + { + /* Do a long subtract of right from left. */ + size = max (AOP_SIZE (left), AOP_SIZE (right)); + + if (size > 1 && IS_GB && requiresHL(AOP(right)) && requiresHL(AOP(left))) + { + // On the Gameboy we can't afford to adjust HL as it may trash the carry. + // Pull left into DE and right into HL + aopGet (AOP(left), LSB, FALSE); + emit2 ("ld d,h"); + emit2 ("ld e,l"); + aopGet (AOP(right), LSB, FALSE); + + while (size--) + { + emit2 ("ld a,(de)"); + emit2 ("%s a,(hl)", offset == 0 ? "sub" : "sbc"); + + if (size != 0) + { + emit2 ("inc hl"); + emit2 ("inc de"); + } + offset++; + } + spillPair (PAIR_HL); + goto release; + } - letype = getSpec(operandType(left)); - retype =getSpec(operandType(right)); - sign = !(SPEC_USIGN(letype) | SPEC_USIGN(retype)); - /* assign the amsops */ - aopOp (left,ic,FALSE, FALSE); - aopOp (right,ic,FALSE, FALSE); - aopOp (result,ic,TRUE, FALSE); + if (AOP_TYPE (right) == AOP_LIT) + { + lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit); + /* optimize if(x < 0) or if(x >= 0) */ + if (lit == 0) + { + if (!sign) + { + /* No sign so it's always false */ + _clearCarry(); + } + else + { + /* Just load in the top most bit */ + _moveA (aopGet (AOP (left), AOP_SIZE (left) - 1, FALSE)); + if (!(AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result)) && ifx) + { + genIfxJump (ifx, "7"); + return; + } + else + { + if (!sign) + { + emit2 ("rlc a"); + } + if (ifx) + { + genIfxJump (ifx, swap_sense ? "c" : "nc"); + return; + } + } + } + goto release; + } + } - genCmp(right, left, result, ifx, sign); + while (size--) + { + _moveA (aopGet (AOP (left), offset, FALSE)); + /* Subtract through, propagating the carry */ + emit2 ("%s a,%s", offset == 0 ? "sub" : "sbc", aopGet (AOP (right), offset, FALSE)); + offset++; + } + } + +release: + if (AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result)) + { + if (sign) + { + /* Shift the sign bit up into carry */ + emit2 ("rlca"); + } + outBitCLong (result, swap_sense); + } + else + { + /* if the result is used in the next + ifx conditional branch then generate + code a little differently */ + if (ifx) + { + if (sign) + { + if (IS_GB) + { + emit2 ("rlca"); + genIfxJump (ifx, swap_sense ? "nc" : "c"); + } + else + { + genIfxJump (ifx, swap_sense ? "p" : "m"); + } + } + else + { + genIfxJump (ifx, swap_sense ? "nc" : "c"); + } + } + else + { + if (sign) + { + /* Shift the sign bit up into carry */ + emit2 ("rlca"); + } + outBitCLong (result, swap_sense); + } + /* leave the result in acc */ + } +} - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); +/*-----------------------------------------------------------------*/ +/* genCmpGt :- greater than comparison */ +/*-----------------------------------------------------------------*/ +static void +genCmpGt (iCode * ic, iCode * ifx) +{ + operand *left, *right, *result; + sym_link *letype, *retype; + int sign; + + 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, FALSE); + aopOp (right, ic, FALSE, FALSE); + aopOp (result, ic, TRUE, FALSE); + + genCmp (right, left, result, ifx, sign); + + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genCmpLt - less than comparisons */ /*-----------------------------------------------------------------*/ -static void genCmpLt (iCode *ic, iCode *ifx) +static void +genCmpLt (iCode * ic, iCode * ifx) { - operand *left, *right, *result; - sym_link *letype , *retype; - int sign ; + operand *left, *right, *result; + sym_link *letype, *retype; + int sign; - left = IC_LEFT(ic); - right= IC_RIGHT(ic); - result = IC_RESULT(ic); + 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)); + letype = getSpec (operandType (left)); + retype = getSpec (operandType (right)); + sign = !(SPEC_USIGN (letype) | SPEC_USIGN (retype)); - /* assign the amsops */ - aopOp (left,ic,FALSE, FALSE); - aopOp (right,ic,FALSE, FALSE); - aopOp (result,ic,TRUE, FALSE); + /* assign the amsops */ + aopOp (left, ic, FALSE, FALSE); + aopOp (right, ic, FALSE, FALSE); + aopOp (result, ic, TRUE, FALSE); - genCmp(left, right, result, ifx, sign); + genCmp (left, right, result, ifx, sign); - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* gencjneshort - compare and jump if not equal */ /*-----------------------------------------------------------------*/ -static void gencjneshort(operand *left, operand *right, symbol *lbl) +static void +gencjneshort (operand * left, operand * right, symbol * lbl) { - int size = max(AOP_SIZE(left),AOP_SIZE(right)); - int offset = 0; - unsigned long lit = 0L; + int size = max (AOP_SIZE (left), AOP_SIZE (right)); + int offset = 0; + unsigned long lit = 0L; - /* Swap the left and right if it makes the computation easier */ - if (AOP_TYPE(left) == AOP_LIT) { - operand *t = right; - right = left; - left = t; + /* Swap the left and right if it makes the computation easier */ + if (AOP_TYPE (left) == AOP_LIT) + { + operand *t = right; + right = left; + left = t; } - if(AOP_TYPE(right) == AOP_LIT) - lit = (unsigned long)floatFromVal(AOP(right)->aopu.aop_lit); - - /* if the right side is a literal then anything goes */ - if (AOP_TYPE(right) == AOP_LIT && - AOP_TYPE(left) != AOP_DIR ) { - if (lit == 0) { - emitcode("ld", "a,%s", aopGet(AOP(left), offset, FALSE)); - if (size > 1) { - size--; - offset++; - while (size--) { - emitcode("or", "a,%s", aopGet(AOP(left), offset, FALSE)); + if (AOP_TYPE (right) == AOP_LIT) + { + lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit); } - } - else { - emitcode("or", "a,a"); - } - emit2("jp nz,!tlabel", lbl->key+100); - } - else { - while (size--) { - emitcode("ld", "a,%s ; 2", aopGet(AOP(left),offset,FALSE)); - if ((AOP_TYPE(right) == AOP_LIT) && lit == 0) - emitcode("or", "a,a"); - else - emitcode("cp", "a,%s", aopGet(AOP(right),offset,FALSE)); - emit2("jp nz,!tlabel", lbl->key+100); - offset++; - } - } + + /* if the right side is a literal then anything goes */ + if (AOP_TYPE (right) == AOP_LIT && + AOP_TYPE (left) != AOP_DIR) + { + if (lit == 0) + { + emit2 ("ld a,%s", aopGet (AOP (left), offset, FALSE)); + if (size > 1) + { + while (--size) + { + emit2 ("or a,%s", aopGet (AOP (left), ++offset, FALSE)); + } + } + else + { + emit2 ("or a,a"); + } + emit2 ("jp NZ,!tlabel", lbl->key + 100); + } + else + { + while (size--) + { + _moveA (aopGet (AOP (left), offset, FALSE)); + if ((unsigned int) ((lit >> (offset * 8)) & 0x0FFL) == 0) + emit2 ("or a,a"); + else + emit2 ("sub a,%s", aopGet (AOP (right), offset, FALSE)); + emit2 ("jp NZ,!tlabel", lbl->key + 100); + offset++; + } + } } - /* if the right side is in a register or in direct space or - if the left is a pointer register & right is not */ - else if (AOP_TYPE(right) == AOP_REG || - AOP_TYPE(right) == AOP_DIR || - (AOP_TYPE(left) == AOP_DIR && AOP_TYPE(right) == AOP_LIT)) { - while (size--) { - MOVA(aopGet(AOP(left),offset,FALSE)); - if((AOP_TYPE(left) == AOP_DIR && AOP_TYPE(right) == AOP_LIT) && - ((unsigned int)((lit >> (offset*8)) & 0x0FFL) == 0)) - /* PENDING */ - emit2("jp nz,!tlabel", lbl->key+100); - else { - emitcode("cp", "%s ; 4", aopGet(AOP(right),offset,FALSE)); - emit2("jp nz,!tlabel", lbl->key+100); - } - offset++; + /* if the right side is in a register or in direct space or + if the left is a pointer register & right is not */ + else if (AOP_TYPE (right) == AOP_REG || + AOP_TYPE (right) == AOP_DIR || + (AOP_TYPE (left) == AOP_DIR && AOP_TYPE (right) == AOP_LIT)) + { + while (size--) + { + _moveA (aopGet (AOP (left), offset, FALSE)); + if (/*AOP_TYPE (left) == AOP_DIR &&*/ AOP_TYPE (right) == AOP_LIT && + ((unsigned int) ((lit >> (offset * 8)) & 0x0FFL) == 0)) + { + /* PENDING */ + /* MB: pending what? doesn't this need "or a,a"? */ + /* and I don't think AOP_TYPE(left) has anything to do with this */ + emit2 ("or a,a"); + emit2 ("jp NZ,!tlabel", lbl->key + 100); + } + else + { + emit2 ("sub %s", aopGet (AOP (right), offset, FALSE)); + emit2 ("jp NZ,!tlabel", lbl->key + 100); + } + offset++; } - } else { - /* right is a pointer reg need both a & b */ - /* PENDING: is this required? */ - while(size--) { - MOVA(aopGet(AOP(right),offset,FALSE)); - emitcode("cp", "%s ; 5", aopGet(AOP(left), offset, FALSE)); - emit2("!shortjp nz,!tlabel", lbl->key+100); - offset++; + } + else + { + /* right is a pointer reg need both a & b */ + /* PENDING: is this required? */ + while (size--) + { + _moveA (aopGet (AOP (right), offset, FALSE)); + emit2 ("cp %s", aopGet (AOP (left), offset, FALSE)); + emit2 ("!shortjp NZ,!tlabel", lbl->key + 100); + offset++; } } } @@ -2926,2056 +4832,3603 @@ static void gencjneshort(operand *left, operand *right, symbol *lbl) /*-----------------------------------------------------------------*/ /* gencjne - compare and jump if not equal */ /*-----------------------------------------------------------------*/ -static void gencjne(operand *left, operand *right, symbol *lbl) +static void +gencjne (operand * left, operand * right, symbol * lbl) { - symbol *tlbl = newiTempLabel(NULL); + symbol *tlbl = newiTempLabel (NULL); - gencjneshort(left, right, lbl); + gencjneshort (left, right, lbl); - /* PENDING: ?? */ - emit2("ld a,!one"); - emit2("!shortjp !tlabel", tlbl->key+100); - emitLabel(lbl->key+100); - emitcode("xor","a,a"); - emitLabel(tlbl->key+100); + /* PENDING: ?? */ + emit2 ("ld a,!one"); + emit2 ("!shortjp !tlabel", tlbl->key + 100); + emitLabel (lbl->key + 100); + emit2 ("xor a,a"); + emitLabel (tlbl->key + 100); } /*-----------------------------------------------------------------*/ /* genCmpEq - generates code for equal to */ /*-----------------------------------------------------------------*/ -static void genCmpEq (iCode *ic, iCode *ifx) +static void +genCmpEq (iCode * ic, iCode * ifx) { - operand *left, *right, *result; + operand *left, *right, *result; - aopOp((left=IC_LEFT(ic)),ic,FALSE, FALSE); - aopOp((right=IC_RIGHT(ic)),ic,FALSE, FALSE); - aopOp((result=IC_RESULT(ic)),ic,TRUE, FALSE); + aopOp ((left = IC_LEFT (ic)), ic, FALSE, FALSE); + aopOp ((right = IC_RIGHT (ic)), ic, FALSE, FALSE); + aopOp ((result = IC_RESULT (ic)), ic, TRUE, FALSE); - /* Swap operands if it makes the operation easier. ie if: - 1. Left is a literal. - */ - if (AOP_TYPE(IC_LEFT(ic)) == AOP_LIT) { - operand *t = IC_RIGHT(ic); - IC_RIGHT(ic) = IC_LEFT(ic); - IC_LEFT(ic) = t; - } - - if (ifx && !AOP_SIZE(result)){ - symbol *tlbl; - /* if they are both bit variables */ - if (AOP_TYPE(left) == AOP_CRY && - ((AOP_TYPE(right) == AOP_CRY) || (AOP_TYPE(right) == AOP_LIT))) { - wassert(0); - } else { - tlbl = newiTempLabel(NULL); - gencjneshort(left, right, tlbl); - if ( IC_TRUE(ifx) ) { - emit2("jp !tlabel", IC_TRUE(ifx)->key+100); - emitLabel(tlbl->key+100); - } else { - /* PENDING: do this better */ - symbol *lbl = newiTempLabel(NULL); - emit2("!shortjp !tlabel", lbl->key+100); - emitLabel(tlbl->key+100); - emit2("jp !tlabel", IC_FALSE(ifx)->key+100); - emitLabel(lbl->key+100); + emitDebug ("; genCmpEq: left %u, right %u, result %u", AOP_SIZE(IC_LEFT(ic)), AOP_SIZE(IC_RIGHT(ic)), AOP_SIZE(IC_RESULT(ic))); + + /* Swap operands if it makes the operation easier. ie if: + 1. Left is a literal. + */ + if (AOP_TYPE (IC_LEFT (ic)) == AOP_LIT) + { + operand *t = IC_RIGHT (ic); + IC_RIGHT (ic) = IC_LEFT (ic); + IC_LEFT (ic) = t; + } + + if (ifx && !AOP_SIZE (result)) + { + symbol *tlbl; + /* if they are both bit variables */ + if (AOP_TYPE (left) == AOP_CRY && + ((AOP_TYPE (right) == AOP_CRY) || (AOP_TYPE (right) == AOP_LIT))) + { + wassertl (0, "Tried to compare two bits"); + } + else + { + tlbl = newiTempLabel (NULL); + gencjneshort (left, right, tlbl); + if (IC_TRUE (ifx)) + { + emit2 ("jp !tlabel", IC_TRUE (ifx)->key + 100); + emitLabel (tlbl->key + 100); + } + else + { + /* PENDING: do this better */ + symbol *lbl = newiTempLabel (NULL); + emit2 ("!shortjp !tlabel", lbl->key + 100); + emitLabel (tlbl->key + 100); + emit2 ("jp !tlabel", IC_FALSE (ifx)->key + 100); + emitLabel (lbl->key + 100); } } - /* mark the icode as generated */ - ifx->generated = 1; - goto release ; + /* mark the icode as generated */ + ifx->generated = 1; + goto release; } - /* if they are both bit variables */ - if (AOP_TYPE(left) == AOP_CRY && - ((AOP_TYPE(right) == AOP_CRY) || (AOP_TYPE(right) == AOP_LIT))) { - wassert(0); - } else { - gencjne(left,right,newiTempLabel(NULL)); - if (AOP_TYPE(result) == AOP_CRY && AOP_SIZE(result)) { - wassert(0); + /* if they are both bit variables */ + if (AOP_TYPE (left) == AOP_CRY && + ((AOP_TYPE (right) == AOP_CRY) || (AOP_TYPE (right) == AOP_LIT))) + { + wassertl (0, "Tried to compare a bit to either a literal or another bit"); + } + else + { + emitDebug(";4"); + + gencjne (left, right, newiTempLabel (NULL)); + if (AOP_TYPE (result) == AOP_CRY && AOP_SIZE (result)) + { + wassert (0); } - if (ifx) { - genIfxJump(ifx,"a"); - goto release; + if (ifx) + { + emitDebug(";5"); + genIfxJump (ifx, "a"); + goto release; } - /* if the result is used in an arithmetic operation - then put the result in place */ - if (AOP_TYPE(result) != AOP_CRY) { - outAcc(result); - } - /* leave the result in acc */ + /* if the result is used in an arithmetic operation + then put the result in place */ + if (AOP_TYPE (result) != AOP_CRY) + { + emitDebug(";6"); + outAcc (result); + } + /* leave the result in acc */ } release: - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* ifxForOp - returns the icode containing the ifx for operand */ /*-----------------------------------------------------------------*/ -static iCode *ifxForOp ( operand *op, iCode *ic ) +static iCode * +ifxForOp (operand * op, iCode * ic) { - /* if true symbol then needs to be assigned */ - if (IS_TRUE_SYMOP(op)) - return NULL ; + /* 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; + /* 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; + return NULL; } /*-----------------------------------------------------------------*/ /* genAndOp - for && operation */ /*-----------------------------------------------------------------*/ -static void genAndOp (iCode *ic) +static void +genAndOp (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, TRUE); - aopOp((right=IC_RIGHT(ic)),ic,FALSE, TRUE); - aopOp((result=IC_RESULT(ic)),ic,FALSE, FALSE); - - /* if both are bit variables */ - if (AOP_TYPE(left) == AOP_CRY && - AOP_TYPE(right) == AOP_CRY ) { - wassert(0); - } else { - tlbl = newiTempLabel(NULL); - toBoolean(left); - emit2("!shortjp z,!tlabel", tlbl->key+100); - toBoolean(right); - emitLabel(tlbl->key+100); - outBitAcc(result); + 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, TRUE); + aopOp ((right = IC_RIGHT (ic)), ic, FALSE, TRUE); + aopOp ((result = IC_RESULT (ic)), ic, FALSE, FALSE); + + /* if both are bit variables */ + if (AOP_TYPE (left) == AOP_CRY && + AOP_TYPE (right) == AOP_CRY) + { + wassertl (0, "Tried to and two bits"); + } + else + { + tlbl = newiTempLabel (NULL); + _toBoolean (left); + emit2 ("!shortjp Z,!tlabel", tlbl->key + 100); + _toBoolean (right); + emitLabel (tlbl->key + 100); + outBitAcc (result); } - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genOrOp - for || operation */ /*-----------------------------------------------------------------*/ -static void genOrOp (iCode *ic) +static void +genOrOp (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, TRUE); - aopOp((right=IC_RIGHT(ic)),ic,FALSE, TRUE); - aopOp((result=IC_RESULT(ic)),ic,FALSE, FALSE); - - /* if both are bit variables */ - if (AOP_TYPE(left) == AOP_CRY && - AOP_TYPE(right) == AOP_CRY ) { - wassert(0); - } else { - tlbl = newiTempLabel(NULL); - toBoolean(left); - emit2("!shortjp nz,!tlabel", tlbl->key+100); - toBoolean(right); - emitLabel(tlbl->key+100); - outBitAcc(result); + 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, TRUE); + aopOp ((right = IC_RIGHT (ic)), ic, FALSE, TRUE); + aopOp ((result = IC_RESULT (ic)), ic, FALSE, FALSE); + + /* if both are bit variables */ + if (AOP_TYPE (left) == AOP_CRY && + AOP_TYPE (right) == AOP_CRY) + { + wassertl (0, "Tried to OR two bits"); + } + else + { + tlbl = newiTempLabel (NULL); + _toBoolean (left); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); + _toBoolean (right); + emitLabel (tlbl->key + 100); + outBitAcc (result); } - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* isLiteralBit - test if lit == 2^n */ /*-----------------------------------------------------------------*/ -int isLiteralBit(unsigned long lit) +int +isLiteralBit (unsigned long lit) { - unsigned long pw[32] = {1L,2L,4L,8L,16L,32L,64L,128L, - 0x100L,0x200L,0x400L,0x800L, - 0x1000L,0x2000L,0x4000L,0x8000L, - 0x10000L,0x20000L,0x40000L,0x80000L, - 0x100000L,0x200000L,0x400000L,0x800000L, - 0x1000000L,0x2000000L,0x4000000L,0x8000000L, - 0x10000000L,0x20000000L,0x40000000L,0x80000000L}; - int idx; - - for(idx = 0; idx < 32; idx++) - if(lit == pw[idx]) - return idx+1; - return 0; + 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; } /*-----------------------------------------------------------------*/ /* jmpTrueOrFalse - */ /*-----------------------------------------------------------------*/ -static void jmpTrueOrFalse (iCode *ic, symbol *tlbl) +static void +jmpTrueOrFalse (iCode * ic, symbol * tlbl) { - // ugly but optimized by peephole - if(IC_TRUE(ic)){ - symbol *nlbl = newiTempLabel(NULL); - emit2("jp !tlabel", nlbl->key+100); - emitLabel(tlbl->key+100); - emit2("jp !tlabel", IC_TRUE(ic)->key+100); - emitLabel(nlbl->key+100); + // ugly but optimized by peephole + if (IC_TRUE (ic)) + { + symbol *nlbl = newiTempLabel (NULL); + emit2 ("jp !tlabel", nlbl->key + 100); + emitLabel (tlbl->key + 100); + emit2 ("jp !tlabel", IC_TRUE (ic)->key + 100); + emitLabel (nlbl->key + 100); } - else{ - emit2("jp !tlabel", IC_FALSE(ic)->key+100); - emitLabel(tlbl->key+100); + else + { + emit2 ("jp !tlabel", IC_FALSE (ic)->key + 100); + emitLabel (tlbl->key + 100); } - ic->generated = 1; + ic->generated = 1; } /*-----------------------------------------------------------------*/ /* genAnd - code for and */ /*-----------------------------------------------------------------*/ -static void genAnd (iCode *ic, iCode *ifx) +static void +genAnd (iCode * ic, iCode * ifx) { - operand *left, *right, *result; - int size, offset=0; - unsigned long lit = 0L; - int bytelit = 0; + operand *left, *right, *result; + int size, offset = 0; + unsigned long lit = 0L; + int bytelit = 0; + + aopOp ((left = IC_LEFT (ic)), ic, FALSE, FALSE); + aopOp ((right = IC_RIGHT (ic)), ic, FALSE, FALSE); + aopOp ((result = IC_RESULT (ic)), ic, TRUE, FALSE); + + /* if left is a literal & right is not then exchange them */ + if ((AOP_TYPE (left) == AOP_LIT && AOP_TYPE (right) != AOP_LIT) || + (AOP_NEEDSACC (right) && !AOP_NEEDSACC (left))) + { + operand *tmp = right; + right = left; + left = tmp; + } - aopOp((left = IC_LEFT(ic)),ic,FALSE, FALSE); - aopOp((right= IC_RIGHT(ic)),ic,FALSE, FALSE); - aopOp((result=IC_RESULT(ic)),ic,TRUE, FALSE); + /* if result = right then exchange them */ + if (sameRegs (AOP (result), AOP (right))) + { + operand *tmp = right; + right = left; + left = tmp; + } -#ifdef DEBUG_TYPE - emitcode("","; Type res[%d] = l[%d]&r[%d]", - AOP_TYPE(result), - AOP_TYPE(left), AOP_TYPE(right)); - emitcode("","; Size res[%d] = l[%d]&r[%d]", - AOP_SIZE(result), - AOP_SIZE(left), AOP_SIZE(right)); -#endif + /* if 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); - /* 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 (AOP_TYPE(left) == AOP_CRY){ - wassert(0); - 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)); - // bit = left & 2^n - if(size) { - wassert(0); - emitcode("mov","c,acc.%d",posbit&0x07); - } - // if(left & 2^n) - else{ - if (ifx) { - sprintf(buffer, "%d", posbit&0x07); - genIfxJump(ifx, buffer); - } - else { - wassert(0); + size = AOP_SIZE (result); + + if (AOP_TYPE (left) == AOP_CRY) + { + wassertl (0, "Tried to perform an AND with a bit as an operand"); + goto release; } - 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)) + { + symbol *tlbl = newiTempLabel (NULL); + int sizel = AOP_SIZE (left); + if (size) + { + /* PENDING: Test case for this. */ + emit2 ("scf"); + } + while (sizel--) + { + if ((bytelit = ((lit >> (offset * 8)) & 0x0FFL)) != 0x0L) + { + _moveA (aopGet (AOP (left), offset, FALSE)); + if (bytelit != 0x0FFL) + { + emit2 ("and a,%s", aopGet (AOP (right), offset, FALSE)); + } + else + { + /* For the flags */ + emit2 ("or a,a"); + } + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); } - } else { - symbol *tlbl = newiTempLabel(NULL); - int sizel = AOP_SIZE(left); - if(size) { - wassert(0); - emitcode("setb","c"); - } - while(sizel--){ - if((bytelit = ((lit >> (offset*8)) & 0x0FFL)) != 0x0L){ - MOVA( aopGet(AOP(left),offset,FALSE)); - // byte == 2^n ? - if((posbit = isLiteralBit(bytelit)) != 0) { - wassert(0); - emitcode("jb","acc.%d,%05d$",(posbit-1)&0x07,tlbl->key+100); - } - else{ - if(bytelit != 0x0FFL) - emitcode("and","a,%s", - aopGet(AOP(right),offset,FALSE)); + offset++; + } + // bit = left & literal + if (size) + { + emit2 ("clr c"); + emit2 ("!tlabeldef", tlbl->key + 100); + } + // if(left & literal) else - /* For the flags */ - emit2("or a,a"); - emit2("!shortjp nz,!tlabel", tlbl->key+100); + { + 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 + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("and a,%s", + aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (left), "a", offset); } } - offset++; - } - // bit = left & literal - if (size){ - emitcode("clr","c"); - emit2("!tlabeldef", tlbl->key+100); + } - // if(left & literal) - else{ - if(ifx) - jmpTrueOrFalse(ifx, tlbl); - goto release ; + else + { + if (AOP_TYPE (left) == AOP_ACC) + { + wassertl (0, "Tried to perform an AND where the left operand is allocated into A"); + } + else + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("and a,%s", + aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (left), "a", offset); + } } } - 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 { - MOVA(aopGet(AOP(left),offset,FALSE)); - emitcode("and","a,%s", - aopGet(AOP(right),offset,FALSE)); - aopPut(AOP(left), "a", offset); + else + { + // left & result in different registers + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Tried to AND where the result is in carry"); } - } - - } else { - if (AOP_TYPE(left) == AOP_ACC) { - wassert(0); - } - else { - MOVA(aopGet(AOP(left),offset,FALSE)); - emitcode("and","a,%s", - aopGet(AOP(right),offset,FALSE)); - aopPut(AOP(left), "a", offset); - } + 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), + offset); + continue; + } + else if (bytelit == 0) + { + aopPut (AOP (result), "!zero", offset); + continue; + } + } + // faster than result <- left, anl result,right + // and better if result is SFR + if (AOP_TYPE (left) == AOP_ACC) + emit2 ("and a,%s", aopGet (AOP (right), offset, FALSE)); + else + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("and a,%s", + aopGet (AOP (right), offset, FALSE)); + } + aopPut (AOP (result), "a", offset); } } - } else { - // left & result in different registers - if(AOP_TYPE(result) == AOP_CRY){ - wassert(0); - } 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), - offset); - continue; - } else if(bytelit == 0){ - aopPut(AOP(result),zero,offset); - continue; - } - } - // faster than result <- left, anl result,right - // and better if result is SFR - if (AOP_TYPE(left) == AOP_ACC) - emitcode("and","a,%s",aopGet(AOP(right),offset,FALSE)); - else { - MOVA(aopGet(AOP(left),offset,FALSE)); - emitcode("and","a,%s", - aopGet(AOP(right),offset,FALSE)); - } - aopPut(AOP(result),"a",offset); - } - } } -release : - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); +release: + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genOr - code for or */ /*-----------------------------------------------------------------*/ -static void genOr (iCode *ic, iCode *ifx) +static void +genOr (iCode * ic, iCode * ifx) { - operand *left, *right, *result; - int size, offset=0; - unsigned long lit = 0L; - - aopOp((left = IC_LEFT(ic)),ic,FALSE, FALSE); - aopOp((right= IC_RIGHT(ic)),ic,FALSE, FALSE); - aopOp((result=IC_RESULT(ic)),ic,TRUE, FALSE); - -#if 1 - emitcode("","; Type res[%d] = l[%d]&r[%d]", - AOP_TYPE(result), - AOP_TYPE(left), AOP_TYPE(right)); - emitcode("","; Size res[%d] = l[%d]&r[%d]", - AOP_SIZE(result), - AOP_SIZE(left), AOP_SIZE(right)); -#endif - - /* if left is a literal & right is not then exchange them */ - if ((AOP_TYPE(left) == AOP_LIT && AOP_TYPE(right) != AOP_LIT) || - AOP_NEEDSACC(left)) { - operand *tmp = right ; - right = left; - left = tmp; + operand *left, *right, *result; + int size, offset = 0; + unsigned long lit = 0L; + int bytelit = 0; + + aopOp ((left = IC_LEFT (ic)), ic, FALSE, FALSE); + aopOp ((right = IC_RIGHT (ic)), ic, FALSE, FALSE); + aopOp ((result = IC_RESULT (ic)), ic, TRUE, FALSE); + + /* if left is a literal & right is not then exchange them */ + if ((AOP_TYPE (left) == AOP_LIT && AOP_TYPE (right) != AOP_LIT) || + (AOP_NEEDSACC (right) && !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 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 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); + if (AOP_TYPE (right) == AOP_LIT) + lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit); - size = AOP_SIZE(result); + size = AOP_SIZE (result); - if (AOP_TYPE(left) == AOP_CRY){ - wassert(0); - goto release ; + if (AOP_TYPE (left) == AOP_CRY) + { + wassertl (0, "Tried to OR where left is a bit"); + goto release; } - if((AOP_TYPE(right) == AOP_LIT) && - (AOP_TYPE(result) == AOP_CRY) && - (AOP_TYPE(left) != AOP_CRY)){ - wassert(0); - 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)) + { + symbol *tlbl = newiTempLabel (NULL); + int sizel = AOP_SIZE (left); - /* 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 { - MOVA(aopGet(AOP(left),offset,FALSE)); - emitcode("or","a,%s", - aopGet(AOP(right),offset,FALSE)); - aopPut(AOP(result),"a", offset); - } - } else { - if (AOP_TYPE(left) == AOP_ACC) - emitcode("or","a,%s",aopGet(AOP(right),offset,FALSE)); - else { - MOVA(aopGet(AOP(left),offset,FALSE)); - emitcode("or","a,%s", - aopGet(AOP(right),offset,FALSE)); - aopPut(AOP(result),"a", offset); + if (size) + { + wassertl (0, "Result is assigned to a bit"); + } + /* PENDING: Modeled after the AND code which is inefficient. */ + while (sizel--) + { + bytelit = (lit >> (offset * 8)) & 0x0FFL; + + _moveA (aopGet (AOP (left), offset, FALSE)); + /* OR with any literal is the same as OR with itself. */ + emit2 ("or a,a"); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); + + offset++; + } + if (ifx) + { + jmpTrueOrFalse (ifx, tlbl); + } + 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 + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("or a,%s", + aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (result), "a", offset); + } + } + else + { + if (AOP_TYPE (left) == AOP_ACC) + emit2 ("or a,%s", aopGet (AOP (right), offset, FALSE)); + else + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("or a,%s", + aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (result), "a", offset); + } } } - } else { - // left & result in different registers - if(AOP_TYPE(result) == AOP_CRY){ - wassert(0); - } else for(;(size--);offset++){ + } + else + { + // left & result in different registers + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Result of OR is in a bit"); + } + 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), - offset); + if (AOP_TYPE (right) == AOP_LIT) + { + if (((lit >> (offset * 8)) & 0x0FFL) == 0x00L) + { + aopPut (AOP (result), + aopGet (AOP (left), offset, FALSE), + offset); continue; - } - } + } + } // faster than result <- left, anl result,right // and better if result is SFR - if (AOP_TYPE(left) == AOP_ACC) - emitcode("or","a,%s",aopGet(AOP(right),offset,FALSE)); - else { - MOVA(aopGet(AOP(left),offset,FALSE)); - emitcode("or","a,%s", - aopGet(AOP(right),offset,FALSE)); - } - aopPut(AOP(result),"a",offset); - /* PENDING: something weird is going on here. Add exception. */ - if (AOP_TYPE(result) == AOP_ACC) - break; - } + if (AOP_TYPE (left) == AOP_ACC) + emit2 ("or a,%s", aopGet (AOP (right), offset, FALSE)); + else + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("or a,%s", + aopGet (AOP (right), offset, FALSE)); + } + aopPut (AOP (result), "a", offset); + /* PENDING: something weird is going on here. Add exception. */ + if (AOP_TYPE (result) == AOP_ACC) + break; + } } -release : - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); +release: + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genXor - code for xclusive or */ /*-----------------------------------------------------------------*/ -static void genXor (iCode *ic, iCode *ifx) +static void +genXor (iCode * ic, iCode * ifx) { - operand *left, *right, *result; - int size, offset=0; - unsigned long lit = 0L; + operand *left, *right, *result; + int size, offset = 0; + unsigned long lit = 0L; - aopOp((left = IC_LEFT(ic)),ic,FALSE, FALSE); - aopOp((right= IC_RIGHT(ic)),ic,FALSE, FALSE); - aopOp((result=IC_RESULT(ic)),ic,TRUE, FALSE); + aopOp ((left = IC_LEFT (ic)), ic, FALSE, FALSE); + aopOp ((right = IC_RIGHT (ic)), ic, FALSE, FALSE); + aopOp ((result = IC_RESULT (ic)), ic, TRUE, FALSE); - /* 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 left is a literal & right is not then exchange them */ + if ((AOP_TYPE (left) == AOP_LIT && AOP_TYPE (right) != AOP_LIT) || + (AOP_NEEDSACC (right) && !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 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 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); + if (AOP_TYPE (right) == AOP_LIT) + lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit); - size = AOP_SIZE(result); + size = AOP_SIZE (result); - if (AOP_TYPE(left) == AOP_CRY){ - wassert(0); - goto release ; + if (AOP_TYPE (left) == AOP_CRY) + { + wassertl (0, "Tried to XOR a bit"); + goto release; } - if((AOP_TYPE(right) == AOP_LIT) && - (AOP_TYPE(result) == AOP_CRY) && - (AOP_TYPE(left) != AOP_CRY)){ - wassert(0); - 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)) + { + symbol *tlbl = newiTempLabel (NULL); + int sizel = AOP_SIZE (left); - /* 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 { - MOVA(aopGet(AOP(right),offset,FALSE)); - emitcode("xor","a,%s", - aopGet(AOP(left),offset,FALSE)); - aopPut(AOP(result),"a",0); - } - } else { - if (AOP_TYPE(left) == AOP_ACC) - emitcode("xor","a,%s",aopGet(AOP(right),offset,FALSE)); - else { - MOVA(aopGet(AOP(right),offset,FALSE)); - emitcode("xor","a,%s", - aopGet(AOP(left),offset,FALSE)); - aopPut(AOP(result),"a",0); + if (size) + { + /* PENDING: Test case for this. */ + wassertl (0, "Tried to XOR left against a literal with the result going into a bit"); + } + while (sizel--) + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("xor a,%s", aopGet (AOP (right), offset, FALSE)); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); + offset++; + } + if (ifx) + { + jmpTrueOrFalse (ifx, tlbl); + } + else + { + wassertl (0, "Result of XOR was destined for a bit"); + } + 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 + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("xor a,%s", + aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (result), "a", offset); + } + } + else + { + if (AOP_TYPE (left) == AOP_ACC) + { + emit2 ("xor a,%s", aopGet (AOP (right), offset, FALSE)); + } + else + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("xor a,%s", + aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (result), "a", offset); + } } } - } else { - // left & result in different registers - if(AOP_TYPE(result) == AOP_CRY){ - wassert(0); - } else for(;(size--);offset++){ + } + else + { + // left & result in different registers + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Result of XOR is in a bit"); + } + 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), - offset); + if (AOP_TYPE (right) == AOP_LIT) + { + if (((lit >> (offset * 8)) & 0x0FFL) == 0x00L) + { + aopPut (AOP (result), + aopGet (AOP (left), offset, FALSE), + offset); continue; - } - } + } + } // faster than result <- left, anl result,right // and better if result is SFR - if (AOP_TYPE(left) == AOP_ACC) - emitcode("xor","a,%s",aopGet(AOP(right),offset,FALSE)); - else { - MOVA(aopGet(AOP(right),offset,FALSE)); - emitcode("xor","a,%s", - aopGet(AOP(left),offset,FALSE)); - aopPut(AOP(result),"a",0); - } - aopPut(AOP(result),"a",offset); - } + if (AOP_TYPE (left) == AOP_ACC) + { + emit2 ("xor a,%s", aopGet (AOP (right), offset, FALSE)); + } + else + { + _moveA (aopGet (AOP (left), offset, FALSE)); + emit2 ("xor a,%s", + aopGet (AOP (right), offset, FALSE)); + } + aopPut (AOP (result), "a", offset); + } } -release : - freeAsmop(left,NULL,ic); - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); +release: + freeAsmop (left, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genInline - write the inline code out */ /*-----------------------------------------------------------------*/ -static void genInline (iCode *ic) +static void +genInline (iCode * ic) { - char buffer[MAX_INLINEASM]; - char *bp = buffer; - char *bp1= buffer; + char *buffer, *bp, *bp1; - inLine += (!options.asmpeep); - strcpy(buffer,IC_INLINE(ic)); + _G.lines.isInline += (!options.asmpeep); - /* 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++; + 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'; + emit2 (bp1); + bp1 = bp; + } + else + { + if (*bp == ':') + { + bp++; + *bp = '\0'; + bp++; + emit2 (bp1); + bp1 = bp; + } + else + bp++; } } - if (bp1 != bp) - emitcode(bp1,""); - /* emitcode("",buffer); */ - inLine -= (!options.asmpeep); + if (bp1 != bp) + emit2 (bp1); + _G.lines.isInline -= (!options.asmpeep); + } /*-----------------------------------------------------------------*/ /* genRRC - rotate right with carry */ /*-----------------------------------------------------------------*/ -static void genRRC (iCode *ic) +static void +genRRC (iCode * ic) { - wassert(0); + wassert (0); } /*-----------------------------------------------------------------*/ /* genRLC - generate code for rotate left with carry */ /*-----------------------------------------------------------------*/ -static void genRLC (iCode *ic) +static void +genRLC (iCode * ic) { - wassert(0); + wassert (0); } /*-----------------------------------------------------------------*/ -/* shiftR2Left2Result - shift right two bytes from left to result */ +/* genGetHbit - generates code get highest order bit */ /*-----------------------------------------------------------------*/ -static void shiftR2Left2Result (operand *left, int offl, - operand *result, int offr, - int shCount, int sign) +static void +genGetHbit (iCode * ic) { - movLeft2Result(left, offl, result, offr, 0); - movLeft2Result(left, offl+1, result, offr+1, 0); + operand *left, *result; + left = IC_LEFT (ic); + result = IC_RESULT (ic); + + aopOp (left, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, FALSE); - if (sign) { - wassert(0); + /* get the highest order byte into a */ + emit2("ld a,%s", aopGet (AOP (left), AOP_SIZE (left) - 1, FALSE)); + + if (AOP_TYPE (result) == AOP_CRY) + { + emit2 ("rl a"); + outBitC (result); + } + else + { + emit2 ("rlc a"); + emit2 ("and a,!one"); + outAcc (result); } - else { - /* if (AOP(result)->type == AOP_REG) {*/ - int size = 2; - int offset = 0; - symbol *tlbl , *tlbl1; - char *l; - tlbl = newiTempLabel(NULL); - tlbl1 = newiTempLabel(NULL); - /* Left is already in result - so now do the shift */ - if (shCount>1) { - emit2("ld a,!immedbyte+1", shCount); - emit2("!shortjp !tlabel", tlbl1->key+100); - emitLabel(tlbl->key+100); - } + freeAsmop (left, NULL, ic); + freeAsmop (result, NULL, ic); +} - emitcode("or", "a,a"); - offset = size; - while (size--) { - l = aopGet(AOP(result), --offset, FALSE); - emitcode("rr","%s", l); - } - if (shCount>1) { - emitLabel(tlbl1->key+100); - emitcode("dec", "a"); - emit2("!shortjp nz,!tlabel", tlbl->key+100); - } +static void +emitRsh2 (asmop *aop, int size, int is_signed) +{ + int offset = 0; + + while (size--) + { + const char *l = aopGet (aop, size, FALSE); + if (offset == 0) + { + emit2 ("%s %s", is_signed ? "sra" : "srl", l); + } + else + { + emit2 ("rr %s", l); + } + offset++; } } /*-----------------------------------------------------------------*/ -/* shiftL2Left2Result - shift left two bytes from left to result */ +/* shiftR2Left2Result - shift right two bytes from left to result */ /*-----------------------------------------------------------------*/ -static void shiftL2Left2Result (operand *left, int offl, - operand *result, int offr, int shCount) +static void +shiftR2Left2Result (operand * left, int offl, + operand * result, int offr, + int shCount, int is_signed) { - if(sameRegs(AOP(result), AOP(left)) && - ((offl + MSB16) == offr)){ - wassert(0); - } else { - /* Copy left into result */ - movLeft2Result(left, offl, result, offr, 0); - movLeft2Result(left, offl+1, result, offr+1, 0); - } - /* PENDING: for now just see if it'll work. */ - /*if (AOP(result)->type == AOP_REG) { */ - { int size = 2; - int offset = 0; - symbol *tlbl , *tlbl1; - char *l; + symbol *tlbl, *tlbl1; - tlbl = newiTempLabel(NULL); - tlbl1 = newiTempLabel(NULL); + movLeft2Result (left, offl, result, offr, 0); + movLeft2Result (left, offl + 1, result, offr + 1, 0); - /* Left is already in result - so now do the shift */ - if (shCount>1) { - emit2("ld a,!immedbyte+1", shCount); - emit2("!shortjp !tlabel", tlbl1->key+100); - emitLabel(tlbl->key+100); - } + if (shCount == 0) + return; - emitcode("or", "a,a"); - while (size--) { - l = aopGet(AOP(result),offset++,FALSE); - emitcode("rl","%s", l); - } - if (shCount>1) { - emitLabel(tlbl1->key+100); - emitcode("dec", "a"); - emit2("!shortjp nz,!tlabel", tlbl->key+100); - } - } -} + /* if (AOP(result)->type == AOP_REG) { */ -/*-----------------------------------------------------------------*/ -/* AccRol - rotate left accumulator by known count */ -/*-----------------------------------------------------------------*/ -static void AccRol (int shCount) + tlbl = newiTempLabel (NULL); + tlbl1 = newiTempLabel (NULL); + + /* Left is already in result - so now do the shift */ + if (shCount <= 4) + { + while (shCount--) + { + emitRsh2 (AOP (result), size, is_signed); + } + } + else + { + emit2 ("ld a,!immedbyte+1", shCount); + emit2 ("!shortjp !tlabel", tlbl1->key + 100); + emitLabel (tlbl->key + 100); + + emitRsh2 (AOP (result), size, is_signed); + + emitLabel (tlbl1->key + 100); + emit2 ("dec a"); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); + } +} + +/*-----------------------------------------------------------------*/ +/* shiftL2Left2Result - shift left two bytes from left to result */ +/*-----------------------------------------------------------------*/ +static void +shiftL2Left2Result (operand * left, int offl, + operand * result, int offr, int shCount) { - shCount &= 0x0007; // shCount : 0..7 - switch(shCount){ - case 0 : - break; - case 1 : - emitcode("rl","a"); - break; - case 2 : - emitcode("rl","a"); - emitcode("rl","a"); - break; - case 3 : - emitcode("rl","a"); - emitcode("rl","a"); - emitcode("rl","a"); - break; - case 4 : - emitcode("rl","a"); - emitcode("rl","a"); - emitcode("rl","a"); - emitcode("rl","a"); - break; - case 5 : - emitcode("rr","a"); - emitcode("rr","a"); - emitcode("rr","a"); - break; - case 6 : - emitcode("rr","a"); - emitcode("rr","a"); - break; - case 7 : - emitcode("rr","a"); - break; + if (sameRegs (AOP (result), AOP (left)) && + ((offl + MSB16) == offr)) + { + wassert (0); + } + else + { + /* Copy left into result */ + movLeft2Result (left, offl, result, offr, 0); + movLeft2Result (left, offl + 1, result, offr + 1, 0); + } + + if (shCount == 0) + return; + + if (getPairId (AOP (result)) == PAIR_HL) + { + while (shCount--) + { + emit2 ("add hl,hl"); + } + } + else + { + int size = 2; + int offset = 0; + symbol *tlbl, *tlbl1; + const char *l; + + tlbl = newiTempLabel (NULL); + tlbl1 = newiTempLabel (NULL); + + if (AOP (result)->type == AOP_REG) + { + while (shCount--) + { + for (offset = 0; offset < size; offset++) + { + l = aopGet (AOP (result), offset, FALSE); + + if (offset == 0) + { + emit2 ("sla %s", l); + } + else + { + emit2 ("rl %s", l); + } + } + } + } + else + { + /* Left is already in result - so now do the shift */ + if (shCount > 1) + { + emit2 ("ld a,!immedbyte+1", shCount); + emit2 ("!shortjp !tlabel", tlbl1->key + 100); + emitLabel (tlbl->key + 100); + } + + while (size--) + { + l = aopGet (AOP (result), offset, FALSE); + + if (offset == 0) + { + emit2 ("sla %s", l); + } + else + { + emit2 ("rl %s", l); + } + + offset++; + } + if (shCount > 1) + { + emitLabel (tlbl1->key + 100); + emit2 ("dec a"); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); + } + } + } +} + +/*-----------------------------------------------------------------*/ +/* AccRol - rotate left accumulator by known count */ +/*-----------------------------------------------------------------*/ +static void +AccRol (int shCount) +{ + shCount &= 0x0007; // shCount : 0..7 + +#if 0 + switch (shCount) + { + case 0: + break; + case 1: + emit2 ("sla a"); + break; + case 2: + emit2 ("sla a"); + emit2 ("rl a"); + break; + case 3: + emit2 ("sla a"); + emit2 ("rl a"); + emit2 ("rl a"); + break; + case 4: + emit2 ("sla a"); + emit2 ("rl a"); + emit2 ("rl a"); + emit2 ("rl a"); + break; + case 5: + emit2 ("srl a"); + emit2 ("rr a"); + emit2 ("rr a"); + break; + case 6: + emit2 ("srl a"); + emit2 ("rr a"); + break; + case 7: + emit2 ("srl a"); + break; + } +#else + switch (shCount) + { + case 0: + break; + case 1: + emit2 ("rlca"); + break; + case 2: + emit2 ("rlca"); + emit2 ("rlca"); + break; + case 3: + emit2 ("rlca"); + emit2 ("rlca"); + emit2 ("rlca"); + break; + case 4: + emit2 ("rlca"); + emit2 ("rlca"); + emit2 ("rlca"); + emit2 ("rlca"); + break; + case 5: + emit2 ("rrca"); + emit2 ("rrca"); + emit2 ("rrca"); + break; + case 6: + emit2 ("rrca"); + emit2 ("rrca"); + break; + case 7: + emit2 ("rrca"); + break; } +#endif } /*-----------------------------------------------------------------*/ /* AccLsh - left shift accumulator by known count */ /*-----------------------------------------------------------------*/ -static void AccLsh (int shCount) +static void +AccLsh (int shCount) { - if(shCount != 0) { - if(shCount == 1) { - emitcode("add","a,a"); - } - else if(shCount == 2) { - emitcode("add","a,a"); - emitcode("add","a,a"); - } else { - /* rotate left accumulator */ - AccRol(shCount); - /* and kill the lower order bits */ - emit2("and a,!immedbyte", SLMask[shCount]); - } + static const unsigned char SLMask[] = + { + 0xFF, 0xFE, 0xFC, 0xF8, 0xF0, 0xE0, 0xC0, 0x80, 0x00 + }; + + if (shCount != 0) + { + if (shCount == 1) + { + emit2 ("add a,a"); + } + else if (shCount == 2) + { + emit2 ("add a,a"); + emit2 ("add a,a"); + } + else + { + /* rotate left accumulator */ + AccRol (shCount); + /* and kill the lower order bits */ + emit2 ("and a,!immedbyte", SLMask[shCount]); + } } } /*-----------------------------------------------------------------*/ /* shiftL1Left2Result - shift left one byte from left to result */ /*-----------------------------------------------------------------*/ -static void shiftL1Left2Result (operand *left, int offl, - operand *result, int offr, int shCount) +static void +shiftL1Left2Result (operand * left, int offl, + operand * result, int offr, int shCount) { - char *l; - l = aopGet(AOP(left),offl,FALSE); - MOVA(l); - /* shift left accumulator */ - AccLsh(shCount); - aopPut(AOP(result),"a",offr); + const char *l; + l = aopGet (AOP (left), offl, FALSE); + _moveA (l); + /* shift left accumulator */ + AccLsh (shCount); + aopPut (AOP (result), "a", offr); } /*-----------------------------------------------------------------*/ -/* genlshTwo - left shift two bytes by known amount != 0 */ +/* genlshTwo - left shift two bytes by known amount */ /*-----------------------------------------------------------------*/ -static void genlshTwo (operand *result,operand *left, int shCount) +static void +genlshTwo (operand * result, operand * left, int shCount) { - int size = AOP_SIZE(result); + int size = AOP_SIZE (result); - wassert(size==2); + wassert (size == 2); - /* if shCount >= 8 */ - if (shCount >= 8) { - shCount -= 8 ; - if (size > 1){ - if (shCount) { - movLeft2Result(left, LSB, result, MSB16, 0); - aopPut(AOP(result),zero, 0); - shiftL1Left2Result(left, MSB16, result, MSB16, shCount); - } - else { - movLeft2Result(left, LSB, result, MSB16, 0); - aopPut(AOP(result),zero, 0); - } + /* if shCount >= 8 */ + if (shCount >= 8) + { + shCount -= 8; + if (size > 1) + { + if (shCount) + { + movLeft2Result (left, LSB, result, MSB16, 0); + shiftL1Left2Result (left, LSB, result, MSB16, shCount); + aopPut (AOP (result), "!zero", LSB); + } + else + { + movLeft2Result (left, LSB, result, MSB16, 0); + aopPut (AOP (result), "!zero", 0); + } + } + else + { + aopPut (AOP (result), "!zero", LSB); } - else { - aopPut(AOP(result),zero,LSB); - } } - /* 1 <= shCount <= 7 */ - else { - if(size == 1) { - wassert(0); - } - else { - shiftL2Left2Result(left, LSB, result, LSB, shCount); - } + /* 0 <= shCount <= 7 */ + else + { + if (size == 1) + { + wassert (0); + } + else + { + shiftL2Left2Result (left, LSB, result, LSB, shCount); + } } } /*-----------------------------------------------------------------*/ /* genlshOne - left shift a one byte quantity by known count */ /*-----------------------------------------------------------------*/ -static void genlshOne (operand *result, operand *left, int shCount) +static void +genlshOne (operand * result, operand * left, int shCount) { - shiftL1Left2Result(left, LSB, result, LSB, shCount); + shiftL1Left2Result (left, LSB, result, LSB, shCount); } /*-----------------------------------------------------------------*/ /* genLeftShiftLiteral - left shifting by known count */ /*-----------------------------------------------------------------*/ -static void genLeftShiftLiteral (operand *left, - operand *right, - operand *result, - iCode *ic) +static void +genLeftShiftLiteral (operand * left, + operand * right, + operand * result, + iCode * ic) { - int shCount = (int) floatFromVal (AOP(right)->aopu.aop_lit); - int size; + int shCount = (int) floatFromVal (AOP (right)->aopu.aop_lit); + int size; - freeAsmop(right,NULL,ic); + freeAsmop (right, NULL, ic); - aopOp(left,ic,FALSE, FALSE); - aopOp(result,ic,FALSE, FALSE); + aopOp (left, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, FALSE); - size = getSize(operandType(result)); + size = getSize (operandType (result)); -#if VIEW_SIZE - emitcode("; shift left ","result %d, left %d",size, - AOP_SIZE(left)); -#endif + /* I suppose that the left size >= result size */ - /* I suppose that the left size >= result size */ - if (shCount == 0) { - wassert(0); + if (shCount >= (size * 8)) + { + while (size--) + { + aopPut (AOP (result), "!zero", size); + } } - - else if(shCount >= (size * 8)) - while(size--) - aopPut(AOP(result),zero,size); - else{ - switch (size) { - case 1: - genlshOne (result,left,shCount); - break; - case 2: - genlshTwo (result,left,shCount); - break; - case 4: - wassert(0); - break; - default: - wassert(0); + else + { + switch (size) + { + case 1: + genlshOne (result, left, shCount); + break; + case 2: + genlshTwo (result, left, shCount); + break; + case 4: + wassertl (0, "Shifting of longs is currently unsupported"); + break; + default: + wassert (0); } } - freeAsmop(left,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genLeftShift - generates code for left shifting */ /*-----------------------------------------------------------------*/ -static void genLeftShift (iCode *ic) -{ - int size, offset; - char *l; - symbol *tlbl , *tlbl1; - operand *left,*right, *result; - - right = IC_RIGHT(ic); - left = IC_LEFT(ic); - result = IC_RESULT(ic); - - aopOp(right,ic,FALSE, 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("ld","a,%s",aopGet(AOP(right),0,FALSE)); - emitcode("inc","a"); - freeAsmop (right,NULL,ic); - aopOp(left,ic,FALSE, FALSE); - aopOp(result,ic,FALSE, FALSE); - - /* now move the left to the result if they are not the - same */ -#if 1 - if (!sameRegs(AOP(left),AOP(result))) { - - size = AOP_SIZE(result); - offset = 0; - while (size--) { - l = aopGet(AOP(left),offset,FALSE); - aopPut(AOP(result),l,offset); - offset++; - } +static void +genLeftShift (iCode * ic) +{ + int size, offset; + const char *l; + symbol *tlbl, *tlbl1; + operand *left, *right, *result; + + right = IC_RIGHT (ic); + left = IC_LEFT (ic); + result = IC_RESULT (ic); + + aopOp (right, ic, FALSE, 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; } -#else - size = AOP_SIZE(result); - offset = 0; - while (size--) { - l = aopGet(AOP(left),offset,FALSE); - aopPut(AOP(result),l,offset); - offset++; + + /* 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 ) */ + emit2 ("ld a,%s", aopGet (AOP (right), 0, FALSE)); + emit2 ("inc a"); + freeAsmop (right, NULL, ic); + aopOp (left, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, FALSE); + + if (AOP_TYPE (left) != AOP_REG || AOP_TYPE (result) != AOP_REG) + _push (PAIR_AF); + + /* now move the left to the result if they are not the + same */ + + if (!sameRegs (AOP (left), AOP (result))) + { + + size = AOP_SIZE (result); + offset = 0; + while (size--) + { + l = aopGet (AOP (left), offset, FALSE); + aopPut (AOP (result), l, offset); + offset++; + } } -#endif + tlbl = newiTempLabel (NULL); + size = AOP_SIZE (result); + offset = 0; + tlbl1 = newiTempLabel (NULL); + + if (AOP_TYPE (left) != AOP_REG || AOP_TYPE (result) != AOP_REG) + _pop (PAIR_AF); + + emit2 ("!shortjp !tlabel", tlbl1->key + 100); + emitLabel (tlbl->key + 100); + l = aopGet (AOP (result), offset, FALSE); - tlbl = newiTempLabel(NULL); - size = AOP_SIZE(result); - offset = 0 ; - tlbl1 = newiTempLabel(NULL); + while (size--) + { + l = aopGet (AOP (result), offset, FALSE); - emit2("!shortjp !tlabel", tlbl1->key+100); - emitLabel(tlbl->key+100); - l = aopGet(AOP(result),offset,FALSE); - emitcode("or", "a,a"); - while (size--) { - l = aopGet(AOP(result),offset++,FALSE); - emitcode("rl","%s", l); + if (offset == 0) + { + emit2 ("sla %s", l); + } + else + { + emit2 ("rl %s", l); + } + offset++; } - emitLabel(tlbl1->key+100); - emitcode("dec", "a"); - emit2("!shortjp nz,!tlabel", tlbl->key+100); + emitLabel (tlbl1->key + 100); + emit2 ("dec a"); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); - freeAsmop(left,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genrshOne - left shift two bytes by known amount != 0 */ /*-----------------------------------------------------------------*/ -static void genrshOne (operand *result,operand *left, int shCount) +static void +genrshOne (operand * result, operand * left, int shCount, int is_signed) { - /* Errk */ - int size = AOP_SIZE(result); - char *l; + /* Errk */ + int size = AOP_SIZE (result); + const char *l; - wassert(size==1); - wassert(shCount<8); + wassert (size == 1); + wassert (shCount < 8); - l = aopGet(AOP(left),0,FALSE); - if (AOP(result)->type == AOP_REG) { - aopPut(AOP(result), l, 0); - l = aopGet(AOP(result), 0, FALSE); - while (shCount--) - emitcode("srl", "%s", l); + l = aopGet (AOP (left), 0, FALSE); + + if (AOP (result)->type == AOP_REG) + { + aopPut (AOP (result), l, 0); + l = aopGet (AOP (result), 0, FALSE); + while (shCount--) + { + emit2 ("%s %s", is_signed ? "sra" : "srl", l); + } } - else { - MOVA(l); - while (shCount--) { - emitcode("srl", "a"); - } - aopPut(AOP(result),"a",0); + else + { + _moveA (l); + while (shCount--) + { + emit2 ("%s a", is_signed ? "sra" : "srl"); + } + aopPut (AOP (result), "a", 0); } } /*-----------------------------------------------------------------*/ /* AccRsh - right shift accumulator by known count */ /*-----------------------------------------------------------------*/ -static void AccRsh (int shCount) +static void +AccRsh (int shCount) { - if(shCount != 0){ - /* rotate right accumulator */ - AccRol(8 - shCount); - /* and kill the higher order bits */ - emit2("and a,!immedbyte", SRMask[shCount]); + static const unsigned char SRMask[] = + { + 0xFF, 0x7F, 0x3F, 0x1F, 0x0F, 0x07, 0x03, 0x01, 0x00 + }; + + if (shCount != 0) + { + /* rotate right accumulator */ + AccRol (8 - shCount); + /* and kill the higher order bits */ + emit2 ("and a,!immedbyte", SRMask[shCount]); } } /*-----------------------------------------------------------------*/ /* shiftR1Left2Result - shift right one byte from left to result */ /*-----------------------------------------------------------------*/ -static void shiftR1Left2Result (operand *left, int offl, - operand *result, int offr, - int shCount, int sign) +static void +shiftR1Left2Result (operand * left, int offl, + operand * result, int offr, + int shCount, int sign) { - MOVA(aopGet(AOP(left),offl,FALSE)); - if (sign) { - wassert(0); + _moveA (aopGet (AOP (left), offl, FALSE)); + if (sign) + { + while (shCount--) + { + emit2 ("%s a", sign ? "sra" : "srl"); + } } - else { - AccRsh(shCount); + else + { + AccRsh (shCount); } - aopPut(AOP(result),"a",offr); + aopPut (AOP (result), "a", offr); } /*-----------------------------------------------------------------*/ -/* genrshTwo - right shift two bytes by known amount != 0 */ +/* genrshTwo - right shift two bytes by known amount */ /*-----------------------------------------------------------------*/ -static void genrshTwo (operand *result,operand *left, - int shCount, int sign) +static void +genrshTwo (operand * result, operand * left, + int shCount, int sign) { - /* if shCount >= 8 */ - if (shCount >= 8) { - shCount -= 8; - if (shCount) { - shiftR1Left2Result(left, MSB16, result, LSB, - shCount, sign); - } - else { - movLeft2Result(left, MSB16, result, LSB, sign); - } - aopPut(AOP(result),zero,1); + /* if shCount >= 8 */ + if (shCount >= 8) + { + shCount -= 8; + if (shCount) + { + shiftR1Left2Result (left, MSB16, result, LSB, + shCount, sign); + } + else + { + movLeft2Result (left, MSB16, result, LSB, sign); + } + if (sign) + { + /* Sign extend the result */ + _moveA(aopGet (AOP (result), 0, FALSE)); + emit2 ("rlc a"); + emit2 ("sbc a,a"); + + aopPut (AOP (result), ACC_NAME, MSB16); + } + else + { + aopPut (AOP (result), "!zero", 1); + } } - /* 1 <= shCount <= 7 */ - else { - shiftR2Left2Result(left, LSB, result, LSB, shCount, sign); + /* 0 <= shCount <= 7 */ + else + { + shiftR2Left2Result (left, LSB, result, LSB, shCount, sign); } } /*-----------------------------------------------------------------*/ /* genRightShiftLiteral - left shifting by known count */ /*-----------------------------------------------------------------*/ -static void genRightShiftLiteral (operand *left, - operand *right, - operand *result, - iCode *ic) +static void +genRightShiftLiteral (operand * left, + operand * right, + operand * result, + iCode * ic, + int sign) { - int shCount = (int) floatFromVal (AOP(right)->aopu.aop_lit); - int size; + int shCount = (int) floatFromVal (AOP (right)->aopu.aop_lit); + int size; - freeAsmop(right,NULL,ic); + freeAsmop (right, NULL, ic); - aopOp(left,ic,FALSE, FALSE); - aopOp(result,ic,FALSE, FALSE); + aopOp (left, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, FALSE); - size = getSize(operandType(result)); + size = getSize (operandType (result)); - emitcode("; shift right ","result %d, left %d",size, - AOP_SIZE(left)); + /* I suppose that the left size >= result size */ - /* I suppose that the left size >= result size */ - if (shCount == 0) { - wassert(0); + if (shCount >= (size * 8)) { + const char *s; + if (!SPEC_USIGN(getSpec(operandType(left)))) { + _moveA(aopGet (AOP (left), 0, FALSE)); + emit2 ("rlc a"); + emit2 ("sbc a,a"); + s=ACC_NAME; + } else { + s="!zero"; } - - else if(shCount >= (size * 8)) - while(size--) - aopPut(AOP(result),zero,size); - else{ - switch (size) { - case 1: - genrshOne(result, left, shCount); - break; - case 2: - /* PENDING: sign support */ - genrshTwo(result, left, shCount, FALSE); - break; - case 4: - wassert(0); - break; - default: - wassert(0); + while (size--) + aopPut (AOP (result), s, size); + } + else + { + switch (size) + { + case 1: + genrshOne (result, left, shCount, sign); + break; + case 2: + genrshTwo (result, left, shCount, sign); + break; + case 4: + wassertl (0, "Asked to shift right a long which should be a function call"); + break; + default: + wassertl (0, "Entered default case in right shift delegate"); } } - freeAsmop(left,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genRightShift - generate code for right shifting */ /*-----------------------------------------------------------------*/ -static void genRightShift (iCode *ic) +static void +genRightShift (iCode * ic) { - operand *right, *left, *result; - sym_link *retype ; - int size, offset, first = 1; - char *l; - bool is_signed; + operand *right, *left, *result; + sym_link *retype; + int size, offset, first = 1; + const char *l; + bool is_signed; - symbol *tlbl, *tlbl1 ; + 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 signed then we do it the hard way preserve the + sign bit moving it inwards */ + retype = getSpec (operandType (IC_RESULT (ic))); - is_signed = !SPEC_USIGN(retype); + is_signed = !SPEC_USIGN (retype); - /* 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 */ + /* 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); + right = IC_RIGHT (ic); + left = IC_LEFT (ic); + result = IC_RESULT (ic); - aopOp(right,ic,FALSE, FALSE); + aopOp (right, ic, FALSE, 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); - return; + /* if the shift count is known then do it + as efficiently as possible */ + if (AOP_TYPE (right) == AOP_LIT) + { + genRightShiftLiteral (left, right, result, ic, is_signed); + return; } - aopOp(left,ic,FALSE, FALSE); - aopOp(result,ic,FALSE, FALSE); + emit2 ("ld a,%s", aopGet (AOP (right), 0, FALSE)); + emit2 ("inc a"); + freeAsmop (right, NULL, ic); - /* now move the left to the result if they are not the - same */ - if (!sameRegs(AOP(left),AOP(result)) && - AOP_SIZE(result) > 1) { + aopOp (left, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, FALSE); - size = AOP_SIZE(result); - offset=0; - while (size--) { - l = aopGet(AOP(left),offset,FALSE); - aopPut(AOP(result),l,offset); - offset++; + if (AOP_TYPE (left) != AOP_REG || AOP_TYPE (result) != AOP_REG) + _push (PAIR_AF); + + /* now move the left to the result if they are not the + same */ + if (!sameRegs (AOP (left), AOP (result))) + { + + size = AOP_SIZE (result); + offset = 0; + while (size--) + { + l = aopGet (AOP (left), offset, FALSE); + aopPut (AOP (result), l, offset); + offset++; } } - emitcode("ld", "a,%s",aopGet(AOP(right),0,FALSE)); - emitcode("inc","a"); - freeAsmop (right, NULL, ic); + tlbl = newiTempLabel (NULL); + tlbl1 = newiTempLabel (NULL); + size = AOP_SIZE (result); + offset = size - 1; - tlbl = newiTempLabel(NULL); - tlbl1= newiTempLabel(NULL); - size = AOP_SIZE(result); - offset = size - 1; + if (AOP_TYPE (left) != AOP_REG || AOP_TYPE (result) != AOP_REG) + _pop (PAIR_AF); - emit2("!shortjp !tlabel", tlbl1->key+100); - emitLabel(tlbl->key+100); - while (size--) { - l = aopGet(AOP(result),offset--,FALSE); - if (first) { - if (is_signed) - emitcode("sra", "%s", l); + emit2 ("!shortjp !tlabel", tlbl1->key + 100); + emitLabel (tlbl->key + 100); + while (size--) + { + l = aopGet (AOP (result), offset--, FALSE); + if (first) + { + emit2 ("%s %s", is_signed ? "sra" : "srl", l); + first = 0; + } else - emitcode("srl", "%s", l); - first = 0; - } - else - emitcode("rr", "%s", l); + { + emit2 ("rr %s", l); + } } - emitLabel(tlbl1->key+100); - emitcode("dec", "a"); - emit2("!shortjp nz,!tlabel", tlbl->key+100); + emitLabel (tlbl1->key + 100); + emit2 ("dec a"); + emit2 ("!shortjp NZ,!tlabel", tlbl->key + 100); - freeAsmop(left,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (left, NULL, ic); + freeAsmop (result, NULL, ic); } + /*-----------------------------------------------------------------*/ -/* genGenPointerGet - get value from generic pointer space */ +/* genUnpackBits - generates code for unpacking bits */ /*-----------------------------------------------------------------*/ -static void genGenPointerGet (operand *left, - operand *result, iCode *ic) +static void +genUnpackBits (operand * result, int pair) { - int size, offset ; - sym_link *retype = getSpec(operandType(result)); - int pair = PAIR_HL; - - if (IS_GB) - pair = PAIR_DE; - - aopOp(left,ic,FALSE, FALSE); - aopOp(result,ic,FALSE, FALSE); - - if (isPair(AOP(left)) && AOP_SIZE(result)==1) { - /* Just do it */ - if (isPtrPair(AOP(left))) - { - tsprintf(buffer, "!*pair", getPairName(AOP(left))); - aopPut(AOP(result), buffer, 0); - } - else { - emit2("ld a,!*pair", getPairName(AOP(left))); - aopPut(AOP(result),"a", 0); - } - freeAsmop(left,NULL,ic); - goto release; + int offset = 0; /* result byte offset */ + int rsize; /* result size */ + int rlen = 0; /* remaining bitfield length */ + sym_link *etype; /* bitfield type information */ + int blen; /* bitfield length */ + int bstr; /* bitfield starting bit within byte */ + + emitDebug ("; genUnpackBits"); + + etype = getSpec (operandType (result)); + rsize = getSize (operandType (result)); + blen = SPEC_BLEN (etype); + bstr = SPEC_BSTR (etype); + + /* If the bitfield length is less than a byte */ + if (blen < 8) + { + emit2 ("ld a,!*pair", _pairs[pair].name); + AccRol (8 - bstr); + emit2 ("and a,!immedbyte", ((unsigned char) -1) >> (8 - blen)); + if (!SPEC_USIGN (etype)) + { + /* signed bitfield */ + symbol *tlbl = newiTempLabel (NULL); + + emit2 ("bit %d,a", blen - 1); + emit2 ("jp Z,!tlabel", tlbl->key + 100); + emit2 ("or a,!immedbyte", (unsigned char) (0xff << blen)); + emitLabel (tlbl->key + 100); + } + aopPut (AOP (result), "a", offset++); + goto finish; } - /* For now we always load into IY */ - /* if this is remateriazable */ - fetchPair(pair, AOP(left)); - - /* so iy now contains the address */ - freeAsmop(left,NULL,ic); - - /* if bit then unpack */ - if (IS_BITVAR(retype)) { - wassert(0); + /* TODO: what if pair == PAIR_DE ? */ + if (getPairId (AOP (result)) == PAIR_HL) + { + wassertl (rsize == 2, "HL must be of size 2"); + emit2 ("ld a,!*hl"); + emit2 ("inc hl"); + emit2 ("ld h,!*hl"); + emit2 ("ld l,a"); + emit2 ("ld a,h"); + emit2 ("and a,!immedbyte", ((unsigned char) -1) >> (16 - blen)); + if (!SPEC_USIGN (etype)) + { + /* signed bitfield */ + symbol *tlbl = newiTempLabel (NULL); + + emit2 ("bit %d,a", blen - 1); + emit2 ("jp Z,!tlabel", tlbl->key + 100); + emit2 ("or a,!immedbyte", (unsigned char) (0xff << blen)); + emitLabel (tlbl->key + 100); + } + emit2 ("ld h,a"); + spillPair (PAIR_HL); + return; } - else { - size = AOP_SIZE(result); - offset = 0 ; - while (size--) { - /* PENDING: make this better */ - if (!IS_GB && AOP(result)->type == AOP_REG) { - aopPut(AOP(result), "!*hl", offset++); - } - else { - emit2("ld a,!*pair", _pairs[pair].name); - aopPut(AOP(result),"a",offset++); - } - if (size) { - emit2("inc %s", _pairs[pair].name); - _G.pairs[pair].offset++; - } + /* Bit field did not fit in a byte. Copy all + but the partial byte at the end. */ + for (rlen=blen;rlen>=8;rlen-=8) + { + emit2 ("ld a,!*pair", _pairs[pair].name); + aopPut (AOP (result), "a", offset++); + if (rlen>8) + { + emit2 ("inc %s", _pairs[pair].name); + _G.pairs[pair].offset++; } } - release: - freeAsmop(result,NULL,ic); -} - -/*-----------------------------------------------------------------*/ -/* genPointerGet - generate code for pointer get */ -/*-----------------------------------------------------------------*/ -static void genPointerGet (iCode *ic) -{ - operand *left, *result ; - sym_link *type, *etype; - - left = IC_LEFT(ic); - result = IC_RESULT(ic) ; + /* Handle the partial byte at the end */ + if (rlen) + { + emit2 ("ld a,!*pair", _pairs[pair].name); + emit2 ("and a,!immedbyte", ((unsigned char) -1) >> (8 - rlen)); + if (!SPEC_USIGN (etype)) + { + /* signed bitfield */ + symbol *tlbl = newiTempLabel (NULL); + + emit2 ("bit %d,a", rlen - 1); + emit2 ("jp Z,!tlabel", tlbl->key + 100); + emit2 ("or a,!immedbyte", (unsigned char) (0xff << rlen)); + emitLabel (tlbl->key + 100); + } + aopPut (AOP (result), "a", offset++); + } - /* depending on the type of pointer we need to - move it to the correct pointer register */ - type = operandType(left); - etype = getSpec(type); +finish: + if (offset < rsize) + { + char *source; - genGenPointerGet (left,result,ic); -} + if (SPEC_USIGN (etype)) + source = "!zero"; + else + { + /* signed bitfield: sign extension with 0x00 or 0xff */ + emit2 ("rla"); + emit2 ("sbc a,a"); -bool isRegOrLit(asmop *aop) -{ - if (aop->type == AOP_REG || aop->type == AOP_LIT || aop->type == AOP_IMMD) - return TRUE; - return FALSE; + source = "a"; + } + rsize -= offset; + while (rsize--) + aopPut (AOP (result), source, offset++); + } } /*-----------------------------------------------------------------*/ -/* genGenPointerSet - stores the value into a pointer location */ +/* genGenPointerGet - get value from generic pointer space */ /*-----------------------------------------------------------------*/ -static void genGenPointerSet (operand *right, - operand *result, iCode *ic) +static void +genGenPointerGet (operand * left, + operand * result, iCode * ic) { - int size, offset ; - sym_link *retype = getSpec(operandType(right)); - PAIR_ID pairId = PAIR_HL; + int size, offset; + sym_link *retype = getSpec (operandType (result)); + int pair = PAIR_HL; - aopOp(result,ic,FALSE, FALSE); - aopOp(right,ic,FALSE, FALSE); + if (IS_GB) + pair = PAIR_DE; - if (IS_GB) - pairId = PAIR_DE; - - /* Handle the exceptions first */ - if (isPair(AOP(result)) && (AOP_SIZE(right)==1)) { - /* Just do it */ - char *l = aopGet(AOP(right), 0, FALSE); - const char *pair = getPairName(AOP(result)); - if (canAssignToPtr(l) && isPtr(pair)) { - emit2("ld !*pair,%s", pair, l); - } - else { - MOVA(l); - emit2("ld !*pair,a", pair); - } - goto release; - } + aopOp (left, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, 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) { - fetchPair(pairId, AOP(result)); - } - /* so hl know contains the address */ - freeAsmop(result,NULL,ic); + size = AOP_SIZE (result); - /* if bit then unpack */ - if (IS_BITVAR(retype)) { - wassert(0); + if (isPair (AOP (left)) && size == 1 && !IS_BITVAR (retype)) + { + /* Just do it */ + if (isPtrPair (AOP (left))) + { + tsprintf (buffer, sizeof(buffer), + "!*pair", getPairName (AOP (left))); + aopPut (AOP (result), buffer, 0); + } + else + { + emit2 ("ld a,!*pair", getPairName (AOP (left))); + aopPut (AOP (result), "a", 0); + } + freeAsmop (left, NULL, ic); + goto release; } - else { - size = AOP_SIZE(right); - offset = 0 ; - while (size--) { - char *l = aopGet(AOP(right),offset,FALSE); - if (isRegOrLit(AOP(right)) && !IS_GB) { - emit2("ld !*pair,%s", _pairs[pairId].name, l); - } - else { - MOVA(l); - emit2("ld !*pair,a", _pairs[pairId].name); - } - if (size) { - emitcode("inc", _pairs[pairId].name); - _G.pairs[pairId].offset++; - } - offset++; + if (getPairId (AOP (left)) == PAIR_IY && !IS_BITVAR (retype)) + { + /* Just do it */ + offset = 0; + while (size--) + { + char at[20]; + tsprintf (at, sizeof(at), "!*iyx", offset); + aopPut (AOP (result), at, offset); + offset++; } + + freeAsmop (left, NULL, ic); + goto release; } - release: - freeAsmop(right,NULL,ic); -} -/*-----------------------------------------------------------------*/ -/* genPointerSet - stores the value into a pointer location */ -/*-----------------------------------------------------------------*/ -static void genPointerSet (iCode *ic) -{ - operand *right, *result ; - sym_link *type, *etype; + /* For now we always load into IY */ + /* if this is remateriazable */ + fetchPair (pair, AOP (left)); - right = IC_RIGHT(ic); - result = IC_RESULT(ic) ; + /* if bit then unpack */ + if (IS_BITVAR (retype)) + { + genUnpackBits (result, pair); + freeAsmop (left, NULL, ic); + goto release; + //wassert (0); + } + else if (getPairId (AOP (result)) == PAIR_HL) + { + wassertl (size == 2, "HL must be of size 2"); + emit2 ("ld a,!*hl"); + emit2 ("inc hl"); + emit2 ("ld h,!*hl"); + emit2 ("ld l,a"); + spillPair (PAIR_HL); + } + else if (getPairId (AOP (left)) == PAIR_HL && !isLastUse (ic, left)) + { + size = AOP_SIZE (result); + offset = 0; + + while (size--) + { + /* PENDING: make this better */ + if (!IS_GB && AOP_TYPE (result) == AOP_REG) + { + aopPut (AOP (result), "!*hl", offset++); + } + else + { + emit2 ("ld a,!*pair", _pairs[pair].name); + aopPut (AOP (result), "a", offset++); + } + if (size) + { + emit2 ("inc %s", _pairs[pair].name); + _G.pairs[pair].offset++; + } + } + /* Fixup HL back down */ + for (size = AOP_SIZE (result)-1; size; size--) + { + emit2 ("dec %s", _pairs[pair].name); + } + } + else + { + size = AOP_SIZE (result); + offset = 0; + + while (size--) + { + /* PENDING: make this better */ + if (!IS_GB && + (AOP_TYPE (result) == AOP_REG || AOP_TYPE (result) == AOP_HLREG)) + { + aopPut (AOP (result), "!*hl", offset++); + } + else + { + emit2 ("ld a,!*pair", _pairs[pair].name); + aopPut (AOP (result), "a", offset++); + } + if (size) + { + emit2 ("inc %s", _pairs[pair].name); + _G.pairs[pair].offset++; + } + } + } + + freeAsmop (left, NULL, ic); + +release: + freeAsmop (result, NULL, ic); +} + +/*-----------------------------------------------------------------*/ +/* genPointerGet - generate code for pointer get */ +/*-----------------------------------------------------------------*/ +static void +genPointerGet (iCode * ic) +{ + operand *left, *result; + sym_link *type, *etype; + + 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); + + genGenPointerGet (left, result, ic); +} + +bool +isRegOrLit (asmop * aop) +{ + if (aop->type == AOP_REG || aop->type == AOP_LIT || aop->type == AOP_IMMD || aop->type == AOP_HLREG) + return TRUE; + return FALSE; +} + + +/*-----------------------------------------------------------------*/ +/* genPackBits - generates code for packed bit storage */ +/*-----------------------------------------------------------------*/ +static void +genPackBits (sym_link * etype, + operand * right, + int pair, + iCode *ic) +{ + int offset = 0; /* source byte offset */ + int rlen = 0; /* remaining bitfield length */ + int blen; /* bitfield length */ + int bstr; /* bitfield starting bit within byte */ + int litval; /* source literal value (if AOP_LIT) */ + unsigned char mask; /* bitmask within current byte */ + int extraPair; /* a tempory register */ + bool needPopExtra=0; /* need to restore original value of temp reg */ + + emitDebug ("; genPackBits",""); + + blen = SPEC_BLEN (etype); + bstr = SPEC_BSTR (etype); + + /* If the bitfield length is less than a byte */ + if (blen < 8) + { + mask = ((unsigned char) (0xFF << (blen + bstr)) | + (unsigned char) (0xFF >> (8 - bstr))); + + if (AOP_TYPE (right) == AOP_LIT) + { + /* Case with a bitfield length <8 and literal source + */ + litval = (int) floatFromVal (AOP (right)->aopu.aop_lit); + litval <<= bstr; + litval &= (~mask) & 0xff; + emit2 ("ld a,!*pair", _pairs[pair].name); + if ((mask|litval)!=0xff) + emit2 ("and a,!immedbyte", mask); + if (litval) + emit2 ("or a,!immedbyte", litval); + emit2 ("ld !*pair,a", _pairs[pair].name); + return; + } + else + { + /* Case with a bitfield length <8 and arbitrary source + */ + _moveA (aopGet (AOP (right), 0, FALSE)); + /* shift and mask source value */ + AccLsh (bstr); + emit2 ("and a,!immedbyte", (~mask) & 0xff); + + extraPair = getFreePairId(ic); + if (extraPair == PAIR_INVALID) + { + extraPair = PAIR_BC; + if (getPairId (AOP (right)) != PAIR_BC + || !isLastUse (ic, right)) + { + _push (extraPair); + needPopExtra = 1; + } + } + emit2 ("ld %s,a", _pairs[extraPair].l); + emit2 ("ld a,!*pair", _pairs[pair].name); + + emit2 ("and a,!immedbyte", mask); + emit2 ("or a,%s", _pairs[extraPair].l); + emit2 ("ld !*pair,a", _pairs[pair].name); + if (needPopExtra) + _pop (extraPair); + return; + } + } + + /* Bit length is greater than 7 bits. In this case, copy */ + /* all except the partial byte at the end */ + for (rlen=blen;rlen>=8;rlen-=8) + { + emit2 ("ld a,%s", aopGet (AOP (right), offset++, FALSE) ); + emit2 ("ld !*pair,a", _pairs[pair].name); + if (rlen>8) + { + emit2 ("inc %s", _pairs[pair].name); + _G.pairs[pair].offset++; + } + } + + /* If there was a partial byte at the end */ + if (rlen) + { + mask = (((unsigned char) -1 << rlen) & 0xff); + + if (AOP_TYPE (right) == AOP_LIT) + { + /* Case with partial byte and literal source + */ + litval = (int) floatFromVal (AOP (right)->aopu.aop_lit); + litval >>= (blen-rlen); + litval &= (~mask) & 0xff; + emit2 ("ld a,!*pair", _pairs[pair].name); + if ((mask|litval)!=0xff) + emit2 ("and a,!immedbyte", mask); + if (litval) + emit2 ("or a,!immedbyte", litval); + } + else + { + /* Case with partial byte and arbitrary source + */ + _moveA (aopGet (AOP (right), offset++, FALSE)); + emit2 ("and a,!immedbyte", (~mask) & 0xff); + + extraPair = getFreePairId(ic); + if (extraPair == PAIR_INVALID) + { + extraPair = getPairId (AOP (right)); + if (!isLastUse (ic, right) || (extraPair == PAIR_INVALID)) + extraPair = PAIR_BC; + + if (getPairId (AOP (right)) != PAIR_BC + || !isLastUse (ic, right)) + { + _push (extraPair); + needPopExtra = 1; + } + } + emit2 ("ld %s,a", _pairs[extraPair].l); + emit2 ("ld a,!*pair", _pairs[pair].name); + + emit2 ("and a,!immedbyte", mask); + emit2 ("or a,%s", _pairs[extraPair].l); + if (needPopExtra) + _pop (extraPair); + + } + emit2 ("ld !*pair,a", _pairs[pair].name); + } +} + + +/*-----------------------------------------------------------------*/ +/* genGenPointerSet - stores the value into a pointer location */ +/*-----------------------------------------------------------------*/ +static void +genGenPointerSet (operand * right, + operand * result, iCode * ic) +{ + int size, offset; + sym_link *retype = getSpec (operandType (right)); + sym_link *letype = getSpec (operandType (result)); + PAIR_ID pairId = PAIR_HL; + bool isBitvar; + + aopOp (result, ic, FALSE, FALSE); + aopOp (right, ic, FALSE, FALSE); + + if (IS_GB) + pairId = PAIR_DE; + + size = AOP_SIZE (right); + + isBitvar = IS_BITVAR(retype) || IS_BITVAR(letype); + emitDebug("; isBitvar = %d", isBitvar); + + /* Handle the exceptions first */ + if (isPair (AOP (result)) && size == 1 && !isBitvar) + { + /* Just do it */ + const char *l = aopGet (AOP (right), 0, FALSE); + const char *pair = getPairName (AOP (result)); + if (canAssignToPtr (l) && isPtr (pair)) + { + emit2 ("ld !*pair,%s", pair, l); + } + else + { + _moveA (l); + emit2 ("ld !*pair,a", pair); + } + goto release; + } + + if ( getPairId( AOP (result)) == PAIR_IY && !isBitvar) + { + /* Just do it */ + const char *l = aopGet (AOP (right), 0, FALSE); + + offset = 0; + while (size--) + { + if (canAssignToPtr (l)) + { + emit2 ("ld !*iyx,%s", offset, aopGet( AOP(right), offset, FALSE)); + } + else + { + _moveA (aopGet (AOP (right), offset, FALSE)); + emit2 ("ld !*iyx,a", offset); + } + offset++; + } + goto release; + } + else if (getPairId (AOP (result)) == PAIR_HL && !isLastUse (ic, result) + && !isBitvar) + { + offset = 0; + + while (size--) + { + const char *l = aopGet (AOP (right), offset, FALSE); + if (isRegOrLit (AOP (right)) && !IS_GB) + { + emit2 ("ld !*pair,%s", _pairs[PAIR_HL].name, l); + } + else + { + _moveA (l); + emit2 ("ld !*pair,a", _pairs[PAIR_HL].name); + } + if (size) + { + emit2 ("inc %s", _pairs[PAIR_HL].name); + _G.pairs[PAIR_HL].offset++; + } + offset++; + } + + /* Fixup HL back down */ + for (size = AOP_SIZE (right)-1; size; size--) + { + emit2 ("dec %s", _pairs[PAIR_HL].name); + } + goto release; + } + + /* if the operand is already in dptr + then we do nothing else we move the value to dptr */ + if (AOP_TYPE (result) != AOP_STR) + { + fetchPair (pairId, AOP (result)); + } + /* so hl now contains the address */ + freeAsmop (result, NULL, ic); + + /* if bit then unpack */ + if (isBitvar) + { + genPackBits ((IS_BITVAR (retype) ? retype : letype), right, pairId, ic); + goto release; + //wassert (0); + } + else + { + offset = 0; + + while (size--) + { + const char *l = aopGet (AOP (right), offset, FALSE); + if (isRegOrLit (AOP (right)) && !IS_GB) + { + emit2 ("ld !*pair,%s", _pairs[pairId].name, l); + } + else + { + _moveA (l); + emit2 ("ld !*pair,a", _pairs[pairId].name); + } + if (size) + { + emit2 ("inc %s", _pairs[pairId].name); + _G.pairs[pairId].offset++; + } + offset++; + } + } +release: + freeAsmop (right, NULL, ic); +} + +/*-----------------------------------------------------------------*/ +/* genPointerSet - stores the value into a pointer location */ +/*-----------------------------------------------------------------*/ +static void +genPointerSet (iCode * ic) +{ + operand *right, *result; + sym_link *type, *etype; + + 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); + /* depending on the type of pointer we need to + move it to the correct pointer register */ + type = operandType (result); + etype = getSpec (type); - genGenPointerSet (right,result,ic); + genGenPointerSet (right, result, ic); } /*-----------------------------------------------------------------*/ /* 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; + operand *cond = IC_COND (ic); + int isbit = 0; - aopOp(cond,ic,FALSE, TRUE); + aopOp (cond, ic, FALSE, TRUE); - /* 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); - - /* 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); + /* get the value into acc */ + if (AOP_TYPE (cond) != AOP_CRY) + _toBoolean (cond); else - genIfxJump(ic,"a"); + isbit = 1; + /* the result is now in the accumulator */ + freeAsmop (cond, NULL, ic); + + /* if there was something to be popped then do it */ + if (popIc) + genIpop (popIc); + + /* if the condition is a bit variable */ + if (isbit && IS_ITEMP (cond) && + SPIL_LOC (cond)) + genIfxJump (ic, SPIL_LOC (cond)->rname); + else if (isbit && !IS_ITEMP (cond)) + genIfxJump (ic, OP_SYMBOL (cond)->rname); + else + genIfxJump (ic, "a"); - ic->generated = 1; + 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)); + symbol *sym = OP_SYMBOL (IC_LEFT (ic)); - aopOp(IC_RESULT(ic),ic,FALSE, FALSE); + aopOp (IC_RESULT (ic), ic, FALSE, FALSE); - /* if the operand is on the stack then we - need to get the stack offset of this - variable */ - if (IS_GB) { - if (sym->onStack) { - spillCached(); - if (sym->stack <= 0) { - emit2("!ldahlsp", sym->stack + _G.stack.pushed + _G.stack.offset); - } - else { - emit2("!ldahlsp", sym->stack + _G.stack.pushed + _G.stack.offset + _G.stack.param_offset); - } - emitcode("ld", "d,h"); - emitcode("ld", "e,l"); - } - else { - emit2("ld de,!hashedstr", sym->rname); - } - aopPut(AOP(IC_RESULT(ic)), "e", 0); - aopPut(AOP(IC_RESULT(ic)), "d", 1); + /* if the operand is on the stack then we + need to get the stack offset of this + variable */ + if (IS_GB) + { + if (sym->onStack) + { + spillCached (); + if (sym->stack <= 0) + { + setupPairFromSP (PAIR_HL, sym->stack + _G.stack.pushed + _G.stack.offset); + } + else + { + setupPairFromSP (PAIR_HL, sym->stack + _G.stack.pushed + _G.stack.offset + _G.stack.param_offset); + } + commitPair (AOP (IC_RESULT (ic)), PAIR_HL); + } + else + { + emit2 ("ld de,!hashedstr", sym->rname); + commitPair (AOP (IC_RESULT (ic)), PAIR_DE); + } } - else { - spillCached(); - if (sym->onStack) { - /* if it has an offset then we need to compute it */ - if (sym->stack > 0) - emitcode("ld", "hl,#%d+%d+%d+%d", sym->stack, _G.stack.pushed, _G.stack.offset, _G.stack.param_offset); + else + { + spillCached (); + if (sym->onStack) + { + /* if it has an offset then we need to compute it */ + if (sym->stack > 0) + emit2 ("ld hl,!immedword", sym->stack + _G.stack.pushed + _G.stack.offset + _G.stack.param_offset); + else + emit2 ("ld hl,!immedword", sym->stack + _G.stack.pushed + _G.stack.offset); + emit2 ("add hl,sp"); + } else - emitcode("ld", "hl,#%d+%d+%d", sym->stack, _G.stack.pushed, _G.stack.offset); - emitcode("add", "hl,sp"); - } - else { - emitcode("ld", "hl,#%s", sym->rname); - } - aopPut(AOP(IC_RESULT(ic)), "l", 0); - aopPut(AOP(IC_RESULT(ic)), "h", 1); + { + emit2 ("ld hl,!hashedstr", sym->rname); + } + commitPair (AOP (IC_RESULT (ic)), PAIR_HL); } - freeAsmop(IC_RESULT(ic),NULL,ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ /* genAssign - generate code for assignment */ /*-----------------------------------------------------------------*/ -static void genAssign (iCode *ic) +static void +genAssign (iCode * ic) { - operand *result, *right; - int size, offset ; - unsigned long lit = 0L; + operand *result, *right; + int size, offset; + unsigned long lit = 0L; - result = IC_RESULT(ic); - right = IC_RIGHT(ic) ; + result = IC_RESULT (ic); + right = IC_RIGHT (ic); -#if 1 - /* Dont bother assigning if they are the same */ - if (operandsEqu (IC_RESULT(ic),IC_RIGHT(ic))) { - emitcode("", "; (operands are equal %u)", operandsEqu(IC_RESULT(ic),IC_RIGHT(ic))); - return; + /* Dont bother assigning if they are the same */ + if (operandsEqu (IC_RESULT (ic), IC_RIGHT (ic))) + { + emitDebug ("; (operands are equal %u)", operandsEqu (IC_RESULT (ic), IC_RIGHT (ic))); + return; } -#endif - aopOp(right,ic,FALSE, FALSE); - aopOp(result,ic,TRUE, FALSE); + aopOp (right, ic, FALSE, FALSE); + aopOp (result, ic, TRUE, FALSE); - /* if they are the same registers */ - if (sameRegs(AOP(right),AOP(result))) { - emitcode("", "; (registers are the same)"); - goto release; + /* if they are the same registers */ + if (sameRegs (AOP (right), AOP (result))) + { + emitDebug ("; (registers are the same)"); + goto release; } - /* if the result is a bit */ - if (AOP_TYPE(result) == AOP_CRY) { - wassert(0); + /* if the result is a bit */ + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Tried to assign to a bit"); } - /* general case */ - size = AOP_SIZE(result); - offset = 0; + /* general case */ + size = AOP_SIZE (result); + offset = 0; - if(AOP_TYPE(right) == AOP_LIT) - lit = (unsigned long)floatFromVal(AOP(right)->aopu.aop_lit); - if (isPair(AOP(result))) { - fetchPair(getPairId(AOP(result)), AOP(right)); + if (AOP_TYPE (right) == AOP_LIT) + { + lit = (unsigned long) floatFromVal (AOP (right)->aopu.aop_lit); } - else if((size > 1) && - (AOP_TYPE(result) != AOP_REG) && - (AOP_TYPE(right) == AOP_LIT) && - !IS_FLOAT(operandType(right)) && - (lit < 256L)) { - bool fXored = FALSE; - offset = 0; - /* Work from the top down. - Done this way so that we can use the cached copy of 0 - in A for a fast clear */ - while (size--) { - if((unsigned int)((lit >> (offset*8)) & 0x0FFL)== 0) { - if (!fXored && size>1) { - emitcode("xor", "a,a"); - fXored = TRUE; + + if (isPair (AOP (result))) + { + fetchPairLong (getPairId (AOP (result)), AOP (right), ic, LSB); } - if (fXored) { - aopPut(AOP(result),"a",offset); + else if ((size > 1) && + (AOP_TYPE (result) != AOP_REG) && + (AOP_TYPE (right) == AOP_LIT) && + !IS_FLOAT (operandType (right)) && + (lit < 256L)) + { + bool fXored = FALSE; + offset = 0; + /* Work from the top down. + Done this way so that we can use the cached copy of 0 + in A for a fast clear */ + while (size--) + { + if ((unsigned int) ((lit >> (offset * 8)) & 0x0FFL) == 0) + { + if (!fXored && size > 1) + { + emit2 ("xor a,a"); + fXored = TRUE; + } + if (fXored) + { + aopPut (AOP (result), "a", offset); + } + else + { + aopPut (AOP (result), "!zero", offset); + } + } + else + aopPut (AOP (result), + aopGet (AOP (right), offset, FALSE), + offset); + offset++; + } } - else { - aopPut(AOP(result), zero, offset); + else if (size == 2 && AOP_TYPE (right) == AOP_IY) + { + emit2 ("ld hl,(%s)", AOP (right)->aopu.aop_dir); + aopPut (AOP (result), "l", LSB); + aopPut (AOP (result), "h", MSB16); } - } - else - aopPut(AOP(result), - aopGet(AOP(right),offset,FALSE), - offset); - offset++; - } + else if (size == 2 && requiresHL (AOP (right)) && requiresHL (AOP (result)) && IS_GB) + { + /* Special case. Load into a and d, then load out. */ + _moveA (aopGet (AOP (right), 0, FALSE)); + emit2 ("ld e,%s", aopGet (AOP (right), 1, FALSE)); + aopPut (AOP (result), "a", 0); + aopPut (AOP (result), "e", 1); } - else if (size == 2 && requiresHL(AOP(right)) && requiresHL(AOP(result)) && IS_GB) { - /* Special case. Load into a and d, then load out. */ - MOVA(aopGet(AOP(right), 0, FALSE)); - emitcode("ld", "e,%s", aopGet(AOP(right), 1, FALSE)); - aopPut(AOP(result), "a", 0); - aopPut(AOP(result), "e", 1); - } else { - while (size--) { - /* PENDING: do this check better */ - if (requiresHL(AOP(right)) && requiresHL(AOP(result))) { - MOVA(aopGet(AOP(right), offset, FALSE)); - aopPut(AOP(result), "a", offset); - } - else - aopPut(AOP(result), - aopGet(AOP(right),offset,FALSE), - offset); - offset++; - } + else if (size == 4 && requiresHL (AOP (right)) && requiresHL (AOP (result)) && IS_GB) + { + /* Special case - simple memcpy */ + aopGet (AOP (right), LSB, FALSE); + emit2 ("ld d,h"); + emit2 ("ld e,l"); + aopGet (AOP (result), LSB, FALSE); + + while (size--) + { + emit2 ("ld a,(de)"); + /* Peephole will optimise this. */ + emit2 ("ld (hl),a"); + + if (size != 0) + { + emit2 ("inc hl"); + emit2 ("inc de"); + } + } + spillPair (PAIR_HL); + } + else + { + while (size--) + { + /* PENDING: do this check better */ + if (IS_GB && requiresHL (AOP (right)) && requiresHL (AOP (result))) + { + _moveA (aopGet (AOP (right), offset, FALSE)); + aopPut (AOP (result), "a", offset); + } + else + aopPut (AOP (result), + aopGet (AOP (right), offset, FALSE), + offset); + offset++; + } } release: - freeAsmop(right,NULL,ic); - freeAsmop(result,NULL,ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genJumpTab - genrates code for jump table */ /*-----------------------------------------------------------------*/ -static void genJumpTab (iCode *ic) -{ - symbol *jtab; - char *l; - - aopOp(IC_JTCOND(ic),ic,FALSE, FALSE); - /* get the condition into accumulator */ - l = aopGet(AOP(IC_JTCOND(ic)),0,FALSE); - if (!IS_GB) - emitcode("push", "de"); - emitcode("ld", "e,%s", l); - emit2("ld d,!zero"); - jtab = newiTempLabel(NULL); - spillCached(); - emit2("ld hl,!immed!tlabel", jtab->key+100); - emitcode("add", "hl,de"); - emitcode("add", "hl,de"); - emitcode("add", "hl,de"); - freeAsmop(IC_JTCOND(ic),NULL,ic); - if (!IS_GB) - emitcode("pop", "de"); - emit2("jp !*hl"); - emitLabel(jtab->key+100); - /* now generate the jump labels */ - for (jtab = setFirstItem(IC_JTLABELS(ic)) ; jtab; - jtab = setNextItem(IC_JTLABELS(ic))) - emit2("jp !tlabel", jtab->key+100); +static void +genJumpTab (iCode * ic) +{ + symbol *jtab; + const char *l; + + aopOp (IC_JTCOND (ic), ic, FALSE, FALSE); + /* get the condition into accumulator */ + l = aopGet (AOP (IC_JTCOND (ic)), 0, FALSE); + if (!IS_GB) + emit2 ("push de"); + emit2 ("ld e,%s", l); + emit2 ("ld d,!zero"); + jtab = newiTempLabel (NULL); + spillCached (); + emit2 ("ld hl,!immed!tlabel", jtab->key + 100); + emit2 ("add hl,de"); + emit2 ("add hl,de"); + emit2 ("add hl,de"); + freeAsmop (IC_JTCOND (ic), NULL, ic); + if (!IS_GB) + emit2 ("pop de"); + emit2 ("jp !*hl"); + emitLabel (jtab->key + 100); + /* now generate the jump labels */ + for (jtab = setFirstItem (IC_JTLABELS (ic)); jtab; + jtab = setNextItem (IC_JTLABELS (ic))) + emit2 ("jp !tlabel", jtab->key + 100); } /*-----------------------------------------------------------------*/ /* genCast - gen code for casting */ /*-----------------------------------------------------------------*/ -static void genCast (iCode *ic) +static void +genCast (iCode * ic) { - operand *result = IC_RESULT(ic); - sym_link *ctype = operandType(IC_LEFT(ic)); - operand *right = IC_RIGHT(ic); - int size, offset ; + operand *result = IC_RESULT (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 ; + /* if they are equivalent then do nothing */ + if (operandsEqu (IC_RESULT (ic), IC_RIGHT (ic))) + return; - aopOp(right,ic,FALSE, FALSE); - aopOp(result,ic,FALSE, FALSE); + aopOp (right, ic, FALSE, FALSE); + aopOp (result, ic, FALSE, FALSE); - /* if the result is a bit */ - if (AOP_TYPE(result) == AOP_CRY) { - wassert(0); + /* if the result is a bit */ + if (AOP_TYPE (result) == AOP_CRY) + { + wassertl (0, "Tried to cast to a bit"); } - /* if they are the same size : or less */ - if (AOP_SIZE(result) <= AOP_SIZE(right)) { + /* if they are the same size : or less */ + if (AOP_SIZE (result) <= AOP_SIZE (right)) + { - /* if they are in the same place */ - if (sameRegs(AOP(right),AOP(result))) - goto release; + /* if they are 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), - offset); - offset++; + /* if they in different places then copy */ + size = AOP_SIZE (result); + offset = 0; + while (size--) + { + aopPut (AOP (result), + aopGet (AOP (right), offset, FALSE), + offset); + offset++; } - goto release; + goto release; } - /* PENDING: should be OK. */ -#if 0 - /* if the result is of type pointer */ - if (IS_PTR(ctype)) { - wassert(0); + /* 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), + offset); + offset++; } -#endif - /* 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), - offset); - offset++; - } - - /* now depending on the sign of the destination */ - size = AOP_SIZE(result) - AOP_SIZE(right); - /* Unsigned or not an integral type - right fill with zeros */ - if (SPEC_USIGN(ctype) || !IS_SPEC(ctype)) { - while (size--) - aopPut(AOP(result),zero,offset++); - } else { - /* we need to extend the sign :{ */ - char *l = aopGet(AOP(right),AOP_SIZE(right) - 1, - FALSE); - MOVA(l); - emitcode("", "; genCast: sign extend untested."); - emitcode("rla", ""); - emitcode("sbc", "a,a"); - while (size--) - aopPut(AOP(result),"a",offset++); + /* now depending on the sign of the destination */ + size = AOP_SIZE (result) - AOP_SIZE (right); + /* Unsigned or not an integral type - right fill with zeros */ + if (!IS_SPEC (rtype) || SPEC_USIGN (rtype) || AOP_TYPE(right)==AOP_CRY) + { + while (size--) + aopPut (AOP (result), "!zero", offset++); + } + else + { + /* we need to extend the sign :{ */ + const char *l = aopGet (AOP (right), AOP_SIZE (right) - 1, + FALSE); + _moveA (l); + emit2 ("rla "); + emit2 ("sbc a,a"); + while (size--) + aopPut (AOP (result), "a", offset++); } release: - freeAsmop(right, NULL, ic); - freeAsmop(result, NULL, ic); + freeAsmop (right, NULL, ic); + freeAsmop (result, NULL, ic); } /*-----------------------------------------------------------------*/ /* genReceive - generate code for a receive iCode */ /*-----------------------------------------------------------------*/ -static void genReceive (iCode *ic) +static void +genReceive (iCode * ic) { - if (isOperandInFarSpace(IC_RESULT(ic)) && - ( OP_SYMBOL(IC_RESULT(ic))->isspilt || - IS_TRUE_SYMOP(IC_RESULT(ic))) ) { - wassert(0); - } else { - accInUse++; - aopOp(IC_RESULT(ic),ic,FALSE, FALSE); - accInUse--; - assignResultValue(IC_RESULT(ic)); + if (isOperandInFarSpace (IC_RESULT (ic)) && + (OP_SYMBOL (IC_RESULT (ic))->isspilt || + IS_TRUE_SYMOP (IC_RESULT (ic)))) + { + wassert (0); + } + else + { + // PENDING: HACK + int size; + int i; + + aopOp (IC_RESULT (ic), ic, FALSE, FALSE); + size = AOP_SIZE(IC_RESULT(ic)); + + for (i = 0; i < size; i++) { + aopPut(AOP(IC_RESULT(ic)), _fReceive[_G.receiveOffset++], i); + } } - freeAsmop(IC_RESULT(ic),NULL,ic); + freeAsmop (IC_RESULT (ic), NULL, ic); } /*-----------------------------------------------------------------*/ -/* genZ80Code - generate code for Z80 based controllers */ +/* genDummyRead - generate code for dummy read of volatiles */ /*-----------------------------------------------------------------*/ -void genZ80Code (iCode *lic) +static void +genDummyRead (iCode * ic) { - iCode *ic; - int cln = 0; + operand *op; + int size, offset; - /* HACK */ - if (IS_GB) { - _fReturn = _gbz80_return; - _fTmp = _gbz80_return; + op = IC_RIGHT (ic); + if (op && IS_SYMOP (op)) + { + aopOp (op, ic, FALSE, FALSE); + + /* general case */ + size = AOP_SIZE (op); + offset = 0; + + while (size--) + { + _moveA (aopGet (AOP (op), offset, FALSE)); + offset++; + } + + freeAsmop (op, NULL, ic); } - else { - _fReturn = _z80_return; - _fTmp = _z80_return; + + op = IC_LEFT (ic); + if (op && IS_SYMOP (op)) + { + aopOp (op, ic, FALSE, FALSE); + + /* general case */ + size = AOP_SIZE (op); + offset = 0; + + while (size--) + { + _moveA (aopGet (AOP (op), offset, FALSE)); + offset++; + } + + freeAsmop (op, NULL, ic); } - tsprintf(zero, "!zero"); +} - lineHead = lineCurr = NULL; +/*-----------------------------------------------------------------*/ +/* genCritical - generate code for start of a critical sequence */ +/*-----------------------------------------------------------------*/ +static void +genCritical (iCode *ic) +{ + symbol *tlbl = newiTempLabel (NULL); - /* if debug information required */ - if (options.debug && currFunc) { - cdbSymbol(currFunc,cdbFile,FALSE,TRUE); - debugLine = 1; - if (IS_STATIC(currFunc->etype)) - emitcode("","F%s$%s$0$0 ==.",moduleName,currFunc->name); + if (IS_GB) + { + emit2 ("!di"); + } + else if (IC_RESULT (ic)) + { + aopOp (IC_RESULT (ic), ic, TRUE, FALSE); + aopPut (AOP (IC_RESULT (ic)), "!zero", 0); + //get interrupt enable flag IFF2 into P/O + emit2 ("ld a,i"); + //disable interrupt + emit2 ("!di"); + //parity odd <==> P/O=0 <==> interrupt enable flag IFF2=0 + emit2 ("jp PO,!tlabel", tlbl->key + 100); + aopPut (AOP (IC_RESULT (ic)), "!one", 0); + emit2 ("!tlabeldef", (tlbl->key + 100)); + freeAsmop (IC_RESULT (ic), NULL, ic); + } else - emitcode("","G$%s$0$0 ==.",currFunc->name); - debugLine = 0; + { + //get interrupt enable flag IFF2 into P/O + emit2 ("ld a,i"); + //disable interrupt + emit2 ("!di"); + //save P/O flag + emit2 ("push af"); } - /* stack pointer name */ - spname = "sp"; +} +/*-----------------------------------------------------------------*/ +/* genEndCritical - generate code for end of a critical sequence */ +/*-----------------------------------------------------------------*/ +static void +genEndCritical (iCode *ic) +{ + symbol *tlbl = newiTempLabel (NULL); - for (ic = lic ; ic ; ic = ic->next ) { + if (IS_GB) + { + emit2 ("!ei"); + } + else if (IC_RIGHT (ic)) + { + aopOp (IC_RIGHT (ic), ic, FALSE, TRUE); + _toBoolean (IC_RIGHT (ic)); + //don't enable interrupts if they were off before + emit2 ("!shortjp Z,!tlabel", tlbl->key + 100); + emit2 ("!ei"); + emitLabel (tlbl->key + 100); + freeAsmop (IC_RIGHT (ic), NULL, ic); + } + else + { + //restore P/O flag + emit2 ("pop af"); + //parity odd <==> P/O=0 <==> interrupt enable flag IFF2 was 0 <==> + //don't enable interrupts as they were off before + emit2 ("jp PO,!tlabel", tlbl->key + 100); + emit2 ("!ei"); + emit2 ("!tlabeldef", (tlbl->key + 100)); + } +} - if ( cln != ic->lineno ) { - if ( options.debug ) { - debugLine = 1; - emitcode("","C$%s$%d$%d$%d ==.", - FileBaseName(ic->filename),ic->lineno, - ic->level,ic->block); - 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 '!' : - emitcode("", "; genNot"); - genNot(ic); - break; +enum + { + /** Maximum number of bytes to emit per line. */ + DBEMIT_MAX_RUN = 8 + }; - case '~' : - emitcode("", "; genCpl"); - genCpl(ic); - break; +/** Context for the byte output chunker. */ +typedef struct +{ + unsigned char buffer[DBEMIT_MAX_RUN]; + int pos; +} DBEMITCTX; - case UNARYMINUS: - emitcode("", "; genUminus"); - genUminus (ic); - break; - case IPUSH: - emitcode("", "; genIpush"); - genIpush (ic); - break; +/** Flushes a byte chunker by writing out all in the buffer and + reseting. +*/ +static void +_dbFlush(DBEMITCTX *self) +{ + char line[256]; - 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))) { - emitcode("", "; genIfx"); - genIfx (ic->next,ic); - } - else { - emitcode("", "; genIpop"); - genIpop (ic); - } - break; + if (self->pos > 0) + { + int i; + sprintf(line, ".db 0x%02X", self->buffer[0]); - case CALL: - emitcode("", "; genCall"); - genCall (ic); - break; + for (i = 1; i < self->pos; i++) + { + sprintf(line + strlen(line), ", 0x%02X", self->buffer[i]); + } + emit2(line); + } + self->pos = 0; +} - case PCALL: - emitcode("", "; genPcall"); - genPcall (ic); - break; +/** Write out another byte, buffering until a decent line is + generated. +*/ +static void +_dbEmit(DBEMITCTX *self, int c) +{ + if (self->pos == DBEMIT_MAX_RUN) + { + _dbFlush(self); + } + self->buffer[self->pos++] = c; +} - case FUNCTION: - emitcode("", "; genFunction"); - genFunction (ic); - break; +/** Context for a simple run length encoder. */ +typedef struct +{ + unsigned last; + unsigned char buffer[128]; + int pos; + /** runLen may be equivalent to pos. */ + int runLen; +} RLECTX; + +enum + { + RLE_CHANGE_COST = 4, + RLE_MAX_BLOCK = 127 + }; + +/** Flush the buffer of a run length encoder by writing out the run or + data that it currently contains. +*/ +static void +_rleCommit(RLECTX *self) +{ + int i; + if (self->pos != 0) + { + DBEMITCTX db; + memset(&db, 0, sizeof(db)); - case ENDFUNCTION: - emitcode("", "; genEndFunction"); - genEndFunction (ic); - break; + emit2(".db %u", self->pos); - case RETURN: - emitcode("", "; genRet"); - genRet (ic); - break; + for (i = 0; i < self->pos; i++) + { + _dbEmit(&db, self->buffer[i]); + } + _dbFlush(&db); + } + /* Reset */ + self->pos = 0; +} - case LABEL: - emitcode("", "; genLabel"); - genLabel (ic); - break; +/* Encoder design: + Can get either a run or a block of random stuff. + Only want to change state if a good run comes in or a run ends. + Detecting run end is easy. + Initial state? + + Say initial state is in run, len zero, last zero. Then if you get a + few zeros then something else then a short run will be output. + Seems OK. While in run mode, keep counting. While in random mode, + keep a count of the run. If run hits margin, output all up to run, + restart, enter run mode. +*/ - case GOTO: - emitcode("", "; genGoto"); - genGoto (ic); - break; +/** Add another byte into the run length encoder, flushing as + required. The run length encoder uses the Amiga IFF style, where + a block is prefixed by its run length. A positive length means + the next n bytes pass straight through. A negative length means + that the next byte is repeated -n times. A zero terminates the + chunks. +*/ +static void +_rleAppend(RLECTX *self, unsigned c) +{ + int i; - case '+' : - emitcode("", "; genPlus"); - genPlus (ic) ; - break; + if (c != self->last) + { + /* The run has stopped. See if it is worthwhile writing it out + as a run. Note that the random data comes in as runs of + length one. + */ + if (self->runLen > RLE_CHANGE_COST) + { + /* Yes, worthwhile. */ + /* Commit whatever was in the buffer. */ + _rleCommit(self); + emit2("!db !immed-%u,!immedbyte", self->runLen, self->last); + } + else + { + /* Not worthwhile. Append to the end of the random list. */ + for (i = 0; i < self->runLen; i++) + { + if (self->pos >= RLE_MAX_BLOCK) + { + /* Commit. */ + _rleCommit(self); + } + self->buffer[self->pos++] = self->last; + } + } + self->runLen = 1; + self->last = c; + } + else + { + if (self->runLen >= RLE_MAX_BLOCK) + { + /* Commit whatever was in the buffer. */ + _rleCommit(self); - case '-' : - emitcode("", "; genMinus"); - genMinus (ic); - break; + emit2 ("!db !immed-%u,!immedbyte", self->runLen, self->last); + self->runLen = 0; + } + self->runLen++; + } +} - case '*' : - emitcode("", "; genMult"); - genMult (ic); - break; +static void +_rleFlush(RLECTX *self) +{ + _rleAppend(self, -1); + _rleCommit(self); + self->pos = 0; + self->last = 0; + self->runLen = 0; +} - case '/' : - emitcode("", "; genDiv"); - genDiv (ic) ; - break; +/** genArrayInit - Special code for initialising an array with constant + data. +*/ +static void +genArrayInit (iCode * ic) +{ + literalList *iLoop; + int ix; + int elementSize = 0, eIndex, i; + unsigned val, lastVal; + sym_link *type; + RLECTX rle; - case '%' : - emitcode("", "; genMod"); - genMod (ic); - break; + memset(&rle, 0, sizeof(rle)); - case '>' : - emitcode("", "; genCmpGt"); - genCmpGt (ic,ifxForOp(IC_RESULT(ic),ic)); - break; + aopOp (IC_LEFT(ic), ic, FALSE, FALSE); - case '<' : - emitcode("", "; genCmpLt"); - genCmpLt (ic,ifxForOp(IC_RESULT(ic),ic)); - break; + _saveRegsForCall(ic, 0); - case LE_OP: - case GE_OP: - case NE_OP: + fetchPair (PAIR_HL, AOP (IC_LEFT (ic))); + emit2 ("call __initrleblock"); - /* note these two are xlated by algebraic equivalence - during parsing SDCC.y */ - werror(E_INTERNAL_ERROR,__FILE__,__LINE__, - "got '>=' or '<=' shouldn't have come here"); - break; + type = operandType(IC_LEFT(ic)); - case EQ_OP: - emitcode("", "; genCmpEq"); - genCmpEq (ic,ifxForOp(IC_RESULT(ic),ic)); - break; + if (type && type->next) + { + if (IS_SPEC(type->next) || IS_PTR(type->next)) + { + elementSize = getSize(type->next); + } + else if (IS_ARRAY(type->next) && type->next->next) + { + elementSize = getSize(type->next->next); + } + else + { + printTypeChainRaw (type, NULL); + wassertl (0, "Can't determine element size in genArrayInit."); + } + } + else + { + wassertl (0, "Can't determine element size in genArrayInit."); + } - case AND_OP: - emitcode("", "; genAndOp"); - genAndOp (ic); - break; + wassertl ((elementSize > 0) && (elementSize <= 4), "Illegal element size in genArrayInit."); - case OR_OP: - emitcode("", "; genOrOp"); - genOrOp (ic); - break; + iLoop = IC_ARRAYILIST(ic); + lastVal = (unsigned)-1; - case '^' : - emitcode("", "; genXor"); - genXor (ic,ifxForOp(IC_RESULT(ic),ic)); - break; + /* Feed all the bytes into the run length encoder which will handle + the actual output. + This works well for mixed char data, and for random int and long + data. + */ + while (iLoop) + { + ix = iLoop->count; + + for (i = 0; i < ix; i++) + { + for (eIndex = 0; eIndex < elementSize; eIndex++) + { + val = (((int)iLoop->literalValue) >> (eIndex * 8)) & 0xff; + _rleAppend(&rle, val); + } + } - case '|' : - emitcode("", "; genOr"); - genOr (ic,ifxForOp(IC_RESULT(ic),ic)); - break; + iLoop = iLoop->next; + } - case BITWISEAND: - emitcode("", "; genAnd"); - genAnd (ic,ifxForOp(IC_RESULT(ic),ic)); - break; + _rleFlush(&rle); + /* Mark the end of the run. */ + emit2(".db 0"); - case INLINEASM: - emitcode("", "; genInline"); - genInline (ic); - break; + _restoreRegsAfterCall(); - case RRC: - emitcode("", "; genRRC"); - genRRC (ic); - break; + spillCached (); - case RLC: - emitcode("", "; genRLC"); - genRLC (ic); - break; + freeAsmop (IC_LEFT(ic), NULL, ic); +} - case GETHBIT: - emitcode("", "; genHBIT"); - wassert(0); +static void +_swap (PAIR_ID one, PAIR_ID two) +{ + if ((one == PAIR_DE && two == PAIR_HL) || (one == PAIR_HL && two == PAIR_DE)) + { + emit2 ("ex de,hl"); + } + else + { + emit2 ("ld a,%s", _pairs[one].l); + emit2 ("ld %s,%s", _pairs[one].l, _pairs[two].l); + emit2 ("ld %s,a", _pairs[two].l); + emit2 ("ld a,%s", _pairs[one].h); + emit2 ("ld %s,%s", _pairs[one].h, _pairs[two].h); + emit2 ("ld %s,a", _pairs[two].h); + } +} - case LEFT_OP: - emitcode("", "; genLeftShift"); - genLeftShift (ic); - break; +/* The problem is that we may have all three pairs used and they may + be needed in a different order. + + Note: Have ex de,hl + + Combinations: + hl = hl => unity, fine + bc = bc + de = de + + hl = hl hl = hl, swap de <=> bc + bc = de + de = bc + + hl = bc Worst case + bc = de + de = hl + + hl = bc de = de, swap bc <=> hl + bc = hl + de = de + + hl = de Worst case + bc = hl + de = bc + + hl = de bc = bc, swap hl <=> de + bc = bc + de = hl + + Break it down into: + * Any pair = pair are done last + * Any pair = iTemp are done last + * Any swaps can be done any time + + A worst case: + push p1 + p1 = p2 + p2 = p3 + pop p3 + + So how do we detect the cases? + How about a 3x3 matrix? + source + dest x x x x + x x x x + x x x x (Fourth for iTemp/other) + + First determin which mode to use by counting the number of unity and + iTemp assigns. + Three - any order + Two - Assign the pair first, then the rest + One - Swap the two, then the rest + Zero - Worst case. +*/ +static void +setupForBuiltin3 (iCode *ic, int nparams, operand **pparams) +{ + PAIR_ID ids[NUM_PAIRS][NUM_PAIRS]; + PAIR_ID dest[3] = { + PAIR_BC, PAIR_HL, PAIR_DE + }; + int i, j, nunity = 0; + memset (ids, PAIR_INVALID, sizeof (ids)); - case RIGHT_OP: - emitcode("", "; genRightShift"); - genRightShift (ic); - break; + /* Sanity checks */ + wassert (nparams == 3); - case GET_VALUE_AT_ADDRESS: - emitcode("", "; genPointerGet"); - genPointerGet(ic); - break; + /* First save everything that needs to be saved. */ + _saveRegsForCall (ic, 0); - case '=' : + /* Loading HL first means that DE is always fine. */ + for (i = 0; i < nparams; i++) + { + aopOp (pparams[i], ic, FALSE, FALSE); + ids[dest[i]][getPairId (AOP (pparams[i]))] = TRUE; + } - if (POINTER_SET(ic)) { - emitcode("", "; genAssign (pointer)"); - genPointerSet(ic); - } - else { - emitcode("", "; genAssign"); - genAssign(ic); - } - break; + /* Count the number of unity or iTemp assigns. */ + for (i = 0; i < 3; i++) + { + if (ids[dest[i]][dest[i]] == TRUE || ids[dest[i]][PAIR_INVALID] == TRUE) + { + nunity++; + } + } - case IFX: - emitcode("", "; genIfx"); - genIfx (ic,NULL); - break; + if (nunity == 3) + { + /* Any order, fall through. */ + } + else if (nunity == 2) + { + /* One is assigned. Pull it out and assign. */ + for (i = 0; i < 3; i++) + { + for (j = 0; j < NUM_PAIRS; j++) + { + if (ids[dest[i]][j] == TRUE) + { + /* Found it. See if it's the right one. */ + if (j == PAIR_INVALID || j == dest[i]) + { + /* Keep looking. */ + } + else + { + fetchPair(dest[i], AOP (pparams[i])); + goto done; + } + } + } + } + } + else if (nunity == 1) + { + /* Find the pairs to swap. */ + for (i = 0; i < 3; i++) + { + for (j = 0; j < NUM_PAIRS; j++) + { + if (ids[dest[i]][j] == TRUE) + { + if (j == PAIR_INVALID || j == dest[i]) + { + /* Keep looking. */ + } + else + { + _swap (j, dest[i]); + goto done; + } + } + } + } + } + else + { + int next = getPairId (AOP (pparams[0])); + emit2 ("push %s", _pairs[next].name); - case ADDRESS_OF: - emitcode("", "; genAddrOf"); - genAddrOf (ic); - break; + if (next == dest[1]) + { + fetchPair (dest[1], AOP (pparams[1])); + fetchPair (dest[2], AOP (pparams[2])); + } + else + { + fetchPair (dest[2], AOP (pparams[2])); + fetchPair (dest[1], AOP (pparams[1])); + } + emit2 ("pop %s", _pairs[dest[0]].name); + } + done: + /* Finally pull out all of the iTemps */ + for (i = 0; i < 3; i++) + { + if (ids[dest[i]][PAIR_INVALID] == 1) + { + fetchPair (dest[i], AOP (pparams[i])); + } + } +} - case JUMPTABLE: - emitcode("", "; genJumpTab"); - genJumpTab (ic); - break; +static void +genBuiltInStrcpy (iCode *ic, int nParams, operand **pparams) +{ + operand *from, *to; + symbol *label; + bool deInUse; - case CAST: - emitcode("", "; genCast"); - genCast (ic); - break; + wassertl (nParams == 2, "Built-in strcpy must have two parameters"); + to = pparams[0]; + from = pparams[1]; - case RECEIVE: - emitcode("", "; genReceive"); - genReceive(ic); - break; + deInUse = bitVectBitValue (ic->rMask, D_IDX) || bitVectBitValue(ic->rMask, E_IDX); - case SEND: - emitcode("", "; addSet"); - addSet(&sendSet,ic); - break; + setupForBuiltin3 (ic, nParams, pparams); - default : - ic = ic; - /* piCode(ic,stdout); */ + label = newiTempLabel(NULL); - } + emitLabel (label->key); + emit2 ("ld a,(hl)"); + emit2 ("ldi"); + emit2 ("or a"); + emit2 ("!shortjp NZ,!tlabel ; 1", label->key); + + freeAsmop (from, NULL, ic->next); + freeAsmop (to, NULL, ic); +} + +static void +genBuiltInMemcpy (iCode *ic, int nParams, operand **pparams) +{ + operand *from, *to, *count; + bool deInUse; + + wassertl (nParams == 3, "Built-in memcpy must have two parameters"); + to = pparams[2]; + from = pparams[1]; + count = pparams[0]; + + deInUse = bitVectBitValue (ic->rMask, D_IDX) || bitVectBitValue(ic->rMask, E_IDX); + + setupForBuiltin3 (ic, nParams, pparams); + + emit2 ("ldir"); + + freeAsmop (count, NULL, ic->next->next); + freeAsmop (from, NULL, ic); + + _restoreRegsAfterCall(); + + /* 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, FALSE); + movLeft2ResultLong (to, 0, IC_RESULT (ic), 0, 0, 2); + freeAsmop (IC_RESULT (ic), NULL, ic); + } + + freeAsmop (to, NULL, ic->next); +} + +/*-----------------------------------------------------------------*/ +/* genBuiltIn - calls the appropriate function to generating code */ +/* for a built in function */ +/*-----------------------------------------------------------------*/ +static void genBuiltIn (iCode *ic) +{ + operand *bi_parms[MAX_BUILTIN_ARGS]; + int nbi_parms; + iCode *bi_iCode; + symbol *bif; + + /* get all the arguments for a built in function */ + bi_iCode = getBuiltinParms(ic,&nbi_parms,bi_parms); + + /* which function is it */ + bif = OP_SYMBOL(IC_LEFT(bi_iCode)); + + if (strcmp(bif->name,"__builtin_strcpy")==0) + { + genBuiltInStrcpy(bi_iCode, nbi_parms, bi_parms); + } + else if (strcmp(bif->name,"__builtin_memcpy")==0) + { + genBuiltInMemcpy(bi_iCode, nbi_parms, bi_parms); + } + else + { + wassertl (0, "Unknown builtin function encountered"); + } +} + +/*-----------------------------------------------------------------*/ +/* genZ80Code - generate code for Z80 based controllers */ +/*-----------------------------------------------------------------*/ +void +genZ80Code (iCode * lic) +{ + iCode *ic; + int cln = 0; + + /* Hack */ + if (IS_GB) + { + _fReturn = _gbz80_return; + _fTmp = _gbz80_return; + } + else + { + _fReturn = _z80_return; + _fTmp = _z80_return; } + _G.lines.head = _G.lines.current = NULL; - /* now we are ready to call the - peep hole optimizer */ - if (!options.nopeep) - peepHole (&lineHead); + /* if debug information required */ + if (options.debug && currFunc) + { + debugFile->writeFunction (currFunc, lic); + } - /* This is unfortunate */ - /* now do the actual printing */ + for (ic = lic; ic; ic = ic->next) { - FILE *fp = codeOutFile; - if (isInHome() && codeOutFile == code->oFile) + _G.current_iCode = ic; + + if (ic->lineno && cln != ic->lineno) + { + if (options.debug) + { + debugFile->writeCLine (ic); + } + if (!options.noCcodeInAsm) + { + emit2 (";%s:%d: %s", ic->filename, ic->lineno, + printCLine(ic->filename, ic->lineno)); + } + cln = ic->lineno; + } + if (options.iCodeInAsm) + { + emit2 (";ic:%d: %s", ic->key, printILine(ic)); + } + /* if the result is marked as + spilt and rematerializable or code for + this has already been generated then + do nothing */ + if (resultRemat (ic) || ic->generated) + continue; + + /* depending on the operation */ + switch (ic->op) + { + case '!': + emitDebug ("; genNot"); + genNot (ic); + break; + + case '~': + emitDebug ("; genCpl"); + genCpl (ic); + break; + + case UNARYMINUS: + emitDebug ("; genUminus"); + genUminus (ic); + break; + + case IPUSH: + emitDebug ("; genIpush"); + 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))) + { + emitDebug ("; genIfx"); + genIfx (ic->next, ic); + } + else + { + emitDebug ("; genIpop"); + genIpop (ic); + } + break; + + case CALL: + emitDebug ("; genCall"); + genCall (ic); + break; + + case PCALL: + emitDebug ("; genPcall"); + genPcall (ic); + break; + + case FUNCTION: + emitDebug ("; genFunction"); + genFunction (ic); + break; + + case ENDFUNCTION: + emitDebug ("; genEndFunction"); + genEndFunction (ic); + break; + + case RETURN: + emitDebug ("; genRet"); + genRet (ic); + break; + + case LABEL: + emitDebug ("; genLabel"); + genLabel (ic); + break; + + case GOTO: + emitDebug ("; genGoto"); + genGoto (ic); + break; + + case '+': + emitDebug ("; genPlus"); + genPlus (ic); + break; + + case '-': + emitDebug ("; genMinus"); + genMinus (ic); + break; + + case '*': + emitDebug ("; genMult"); + genMult (ic); + break; + + case '/': + emitDebug ("; genDiv"); + genDiv (ic); + break; + + case '%': + emitDebug ("; genMod"); + genMod (ic); + break; + + case '>': + emitDebug ("; genCmpGt"); + genCmpGt (ic, ifxForOp (IC_RESULT (ic), ic)); + break; + + case '<': + emitDebug ("; genCmpLt"); + genCmpLt (ic, ifxForOp (IC_RESULT (ic), ic)); + break; + + case LE_OP: + case GE_OP: + case NE_OP: + + /* note these two are xlated by algebraic equivalence + during parsing SDCC.y */ + werror (E_INTERNAL_ERROR, __FILE__, __LINE__, + "got '>=' or '<=' shouldn't have come here"); + break; + + case EQ_OP: + emitDebug ("; genCmpEq"); + genCmpEq (ic, ifxForOp (IC_RESULT (ic), ic)); + break; + + case AND_OP: + emitDebug ("; genAndOp"); + genAndOp (ic); + break; + + case OR_OP: + emitDebug ("; genOrOp"); + genOrOp (ic); + break; + + case '^': + emitDebug ("; genXor"); + genXor (ic, ifxForOp (IC_RESULT (ic), ic)); + break; + + case '|': + emitDebug ("; genOr"); + genOr (ic, ifxForOp (IC_RESULT (ic), ic)); + break; + + case BITWISEAND: + emitDebug ("; genAnd"); + genAnd (ic, ifxForOp (IC_RESULT (ic), ic)); + break; + + case INLINEASM: + emitDebug ("; genInline"); + genInline (ic); + break; + + case RRC: + emitDebug ("; genRRC"); + genRRC (ic); + break; + + case RLC: + emitDebug ("; genRLC"); + genRLC (ic); + break; + + case GETHBIT: + emitDebug ("; genGetHBIT"); + genGetHbit (ic); + break; + + case LEFT_OP: + emitDebug ("; genLeftShift"); + genLeftShift (ic); + break; + + case RIGHT_OP: + emitDebug ("; genRightShift"); + genRightShift (ic); + break; + + case GET_VALUE_AT_ADDRESS: + emitDebug ("; genPointerGet"); + genPointerGet (ic); + break; + + case '=': + + if (POINTER_SET (ic)) + { + emitDebug ("; genAssign (pointer)"); + genPointerSet (ic); + } + else + { + emitDebug ("; genAssign"); + genAssign (ic); + } + break; + + case IFX: + emitDebug ("; genIfx"); + genIfx (ic, NULL); + break; + + case ADDRESS_OF: + emitDebug ("; genAddrOf"); + genAddrOf (ic); + break; + + case JUMPTABLE: + emitDebug ("; genJumpTab"); + genJumpTab (ic); + break; + + case CAST: + emitDebug ("; genCast"); + genCast (ic); + break; + + case RECEIVE: + emitDebug ("; genReceive"); + genReceive (ic); + break; + + case SEND: + if (ic->builtinSEND) + { + emitDebug ("; genBuiltIn"); + genBuiltIn(ic); + } + else + { + emitDebug ("; addSet"); + addSet (&_G.sendSet, ic); + } + break; + + case ARRAYINIT: + emitDebug ("; genArrayInit"); + genArrayInit(ic); + break; + + case DUMMY_READ_VOLATILE: + emitDebug ("; genDummyRead"); + genDummyRead (ic); + break; + + case CRITICAL: + emitDebug ("; genCritical"); + genCritical (ic); + break; + + case ENDCRITICAL: + emitDebug ("; genEndCritical"); + genEndCritical (ic); + break; + + default: + ic = ic; + } + } + + + /* now we are ready to call the + peep hole optimizer */ + if (!options.nopeep) + peepHole (&_G.lines.head); + + /* This is unfortunate */ + /* now do the actual printing */ + { + FILE *fp = codeOutFile; + if (isInHome () && codeOutFile == code->oFile) codeOutFile = home->oFile; - printLine (lineHead, codeOutFile); - if (_G.flush_statics) { - flushStatics(); - _G.flush_statics = 0; + printLine (_G.lines.head, codeOutFile); + if (_G.flushStatics) + { + flushStatics (); + _G.flushStatics = 0; + } + codeOutFile = fp; } - codeOutFile = fp; + + freeTrace(&_G.lines.trace); + freeTrace(&_G.trace.aops); +} + +/* + Attic +static int +_isPairUsed (iCode * ic, PAIR_ID pairId) +{ + int ret = 0; + switch (pairId) + { + case PAIR_DE: + if (bitVectBitValue (ic->rMask, D_IDX)) + ret++; + if (bitVectBitValue (ic->rMask, E_IDX)) + ret++; + break; + default: + wassert (0); } + return ret; +} + +static char * +fetchLitSpecial (asmop * aop, bool negate, bool xor) +{ + unsigned long v; + value *val = aop->aopu.aop_lit; + + wassert (aop->type == AOP_LIT); + wassert (!IS_FLOAT (val->type)); + + v = (unsigned long) floatFromVal (val); + + if (xor) + v ^= 0x8000; + if (negate) + v = 0-v; + v &= 0xFFFF; + + tsprintf (buffer, sizeof(buffer), "!immedword", v); + return traceAlloc(&_G.trace.aops, Safe_strdup (buffer)); } + + +*/