X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fcc65%2Fcodeinfo.c;h=50052d59de82ff0f13a830ae8b9c28bfbccd7cd2;hb=ce931b85be8c41d30510685c6b92fbe74e12aec9;hp=8592e32c8b1426d10f2fca66f16e004b65bfe6ef;hpb=42326113cbfd259b2b7f3991b726a8778e0d3581;p=cc65 diff --git a/src/cc65/codeinfo.c b/src/cc65/codeinfo.c index 8592e32c8..50052d59d 100644 --- a/src/cc65/codeinfo.c +++ b/src/cc65/codeinfo.c @@ -6,10 +6,10 @@ /* */ /* */ /* */ -/* (C) 2001 Ullrich von Bassewitz */ -/* Wacholderweg 14 */ -/* D-70597 Stuttgart */ -/* EMail: uz@cc65.org */ +/* (C) 2001-2009, Ullrich von Bassewitz */ +/* Roemerstrasse 52 */ +/* D-70794 Filderstadt */ +/* EMail: uz@cc65.org */ /* */ /* */ /* This software is provided 'as-is', without any expressed or implied */ @@ -37,13 +37,16 @@ #include /* common */ +#include "chartype.h" #include "coll.h" +#include "debugflag.h" /* cc65 */ #include "codeent.h" #include "codeseg.h" #include "datatype.h" #include "error.h" +#include "reginfo.h" #include "symtab.h" #include "codeinfo.h" @@ -55,22 +58,45 @@ +/* Table with the compare suffixes */ +static const char CmpSuffixTab [][4] = { + "eq", "ne", "gt", "ge", "lt", "le", "ugt", "uge", "ult", "ule" +}; + /* Table listing the function names and code info values for known internally * used functions. This table should get auto-generated in the future. */ typedef struct FuncInfo FuncInfo; struct FuncInfo { - const char* Name; /* Function name */ - unsigned short Use; /* Register usage */ - unsigned short Chg; /* Changed/destroyed registers */ + const char* Name; /* Function name */ + unsigned short Use; /* Register usage */ + unsigned short Chg; /* Changed/destroyed registers */ }; +/* Note for the shift functions: Shifts are done modulo 32, so all shift + * routines are marked to use only the A register. The remainder is ignored + * anyway. + */ static const FuncInfo FuncInfoTable[] = { + { "addeq0sp", REG_AX, REG_AXY }, + { "addeqysp", REG_AXY, REG_AXY }, { "addysp", REG_Y, REG_NONE }, { "aslax1", REG_AX, REG_AX | REG_TMP1 }, { "aslax2", REG_AX, REG_AX | REG_TMP1 }, { "aslax3", REG_AX, REG_AX | REG_TMP1 }, { "aslax4", REG_AX, REG_AX | REG_TMP1 }, + { "asleax1", REG_EAX, REG_EAX | REG_TMP1 }, + { "asleax2", REG_EAX, REG_EAX | REG_TMP1 }, + { "asleax3", REG_EAX, REG_EAX | REG_TMP1 }, + { "asleax4", REG_EAX, REG_EAXY | REG_TMP1 }, + { "asrax1", REG_AX, REG_AX | REG_TMP1 }, + { "asrax2", REG_AX, REG_AX | REG_TMP1 }, + { "asrax3", REG_AX, REG_AX | REG_TMP1 }, + { "asrax4", REG_AX, REG_AX | REG_TMP1 }, + { "asreax1", REG_EAX, REG_EAX | REG_TMP1 }, + { "asreax2", REG_EAX, REG_EAX | REG_TMP1 }, + { "asreax3", REG_EAX, REG_EAX | REG_TMP1 }, + { "asreax4", REG_EAX, REG_EAXY | REG_TMP1 }, { "bnega", REG_A, REG_AX }, { "bnegax", REG_AX, REG_AX }, { "bnegeax", REG_EAX, REG_EAX }, @@ -78,12 +104,13 @@ static const FuncInfo FuncInfoTable[] = { { "boolge", REG_NONE, REG_AX }, { "boolgt", REG_NONE, REG_AX }, { "boolle", REG_NONE, REG_AX }, - { "boollt", REG_NONE, REG_AX }, + { "boollt", REG_NONE, REG_AX }, { "boolne", REG_NONE, REG_AX }, { "booluge", REG_NONE, REG_AX }, { "boolugt", REG_NONE, REG_AX }, { "boolule", REG_NONE, REG_AX }, { "boolult", REG_NONE, REG_AX }, + { "callax", REG_AX, REG_ALL }, { "complax", REG_AX, REG_AX }, { "decax1", REG_AX, REG_AX }, { "decax2", REG_AX, REG_AX }, @@ -94,6 +121,7 @@ static const FuncInfo FuncInfoTable[] = { { "decax7", REG_AX, REG_AX }, { "decax8", REG_AX, REG_AX }, { "decaxy", REG_AXY, REG_AX | REG_TMP1 }, + { "deceaxy", REG_EAXY, REG_EAX }, { "decsp1", REG_NONE, REG_Y }, { "decsp2", REG_NONE, REG_A }, { "decsp3", REG_NONE, REG_A }, @@ -102,8 +130,15 @@ static const FuncInfo FuncInfoTable[] = { { "decsp6", REG_NONE, REG_A }, { "decsp7", REG_NONE, REG_A }, { "decsp8", REG_NONE, REG_A }, - { "incax1", REG_AX, REG_AX }, - { "incax2", REG_AX, REG_AX }, + { "incax1", REG_AX, REG_AX }, + { "incax2", REG_AX, REG_AX }, + { "incax3", REG_AX, REG_AXY | REG_TMP1 }, + { "incax4", REG_AX, REG_AXY | REG_TMP1 }, + { "incax5", REG_AX, REG_AXY | REG_TMP1 }, + { "incax6", REG_AX, REG_AXY | REG_TMP1 }, + { "incax7", REG_AX, REG_AXY | REG_TMP1 }, + { "incax8", REG_AX, REG_AXY | REG_TMP1 }, + { "incaxy", REG_AXY, REG_AXY | REG_TMP1 }, { "incsp1", REG_NONE, REG_NONE }, { "incsp2", REG_NONE, REG_Y }, { "incsp3", REG_NONE, REG_Y }, @@ -113,50 +148,185 @@ static const FuncInfo FuncInfoTable[] = { { "incsp7", REG_NONE, REG_Y }, { "incsp8", REG_NONE, REG_Y }, { "laddeq", REG_EAXY|REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "laddeq0sp", REG_EAX, REG_EAXY }, { "laddeq1", REG_Y | REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, { "laddeqa", REG_AY | REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "laddeqysp", REG_EAXY, REG_EAXY }, { "ldaidx", REG_AXY, REG_AX | REG_PTR1 }, { "ldauidx", REG_AXY, REG_AX | REG_PTR1 }, - { "ldax0sp", REG_Y, REG_AX }, + { "ldax0sp", REG_NONE, REG_AXY }, { "ldaxi", REG_AX, REG_AXY | REG_PTR1 }, - { "ldaxidx", REG_AXY, REG_AX | REG_PTR1 }, - { "ldaxysp", REG_Y, REG_AX }, - { "leaasp", REG_A, REG_AX }, + { "ldaxidx", REG_AXY, REG_AXY | REG_PTR1 }, + { "ldaxysp", REG_Y, REG_AXY }, + { "ldeax0sp", REG_NONE, REG_EAXY }, + { "ldeaxi", REG_AX, REG_EAXY | REG_PTR1 }, + { "ldeaxidx", REG_AXY, REG_EAXY | REG_PTR1 }, + { "ldeaxysp", REG_Y, REG_EAXY }, + { "leaa0sp", REG_A, REG_AX }, + { "leaaxsp", REG_AX, REG_AX }, + { "lsubeq", REG_EAXY|REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "lsubeq0sp", REG_EAX, REG_EAXY }, + { "lsubeq1", REG_Y | REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "lsubeqa", REG_AY | REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "lsubeqysp", REG_EAXY, REG_EAXY }, + { "mulax10", REG_AX, REG_AX | REG_PTR1 }, + { "mulax3", REG_AX, REG_AX | REG_PTR1 }, + { "mulax5", REG_AX, REG_AX | REG_PTR1 }, + { "mulax6", REG_AX, REG_AX | REG_PTR1 }, + { "mulax7", REG_AX, REG_AX | REG_PTR1 }, + { "mulax9", REG_AX, REG_AX | REG_PTR1 }, { "negax", REG_AX, REG_AX }, + { "push0", REG_NONE, REG_AXY }, + { "push0ax", REG_AX, REG_Y | REG_SREG }, + { "push1", REG_NONE, REG_AXY }, + { "push2", REG_NONE, REG_AXY }, + { "push3", REG_NONE, REG_AXY }, + { "push4", REG_NONE, REG_AXY }, + { "push5", REG_NONE, REG_AXY }, + { "push6", REG_NONE, REG_AXY }, + { "push7", REG_NONE, REG_AXY }, { "pusha", REG_A, REG_Y }, { "pusha0", REG_A, REG_XY }, - { "pushax", REG_AX, REG_Y }, + { "pusha0sp", REG_NONE, REG_AY }, + { "pushaFF", REG_A, REG_Y }, + { "pushax", REG_AX, REG_Y }, + { "pushaysp", REG_Y, REG_AY }, + { "pushc0", REG_NONE, REG_A | REG_Y }, + { "pushc1", REG_NONE, REG_A | REG_Y }, + { "pushc2", REG_NONE, REG_A | REG_Y }, { "pusheax", REG_EAX, REG_Y }, + { "pushw", REG_AX, REG_AXY | REG_PTR1 }, { "pushw0sp", REG_NONE, REG_AXY }, + { "pushwidx", REG_AXY, REG_AXY | REG_PTR1 }, { "pushwysp", REG_Y, REG_AXY }, + { "regswap", REG_AXY, REG_AXY | REG_TMP1 }, + { "regswap1", REG_XY, REG_A }, + { "regswap2", REG_XY, REG_A | REG_Y }, + { "return0", REG_NONE, REG_AX }, + { "return1", REG_NONE, REG_AX }, { "shlax1", REG_AX, REG_AX | REG_TMP1 }, { "shlax2", REG_AX, REG_AX | REG_TMP1 }, { "shlax3", REG_AX, REG_AX | REG_TMP1 }, { "shlax4", REG_AX, REG_AX | REG_TMP1 }, + { "shleax1", REG_EAX, REG_EAX | REG_TMP1 }, + { "shleax2", REG_EAX, REG_EAX | REG_TMP1 }, + { "shleax3", REG_EAX, REG_EAX | REG_TMP1 }, + { "shleax4", REG_EAX, REG_EAXY | REG_TMP1 }, { "shrax1", REG_AX, REG_AX | REG_TMP1 }, { "shrax2", REG_AX, REG_AX | REG_TMP1 }, { "shrax3", REG_AX, REG_AX | REG_TMP1 }, { "shrax4", REG_AX, REG_AX | REG_TMP1 }, - { "shreax1", REG_EAX, REG_AX | REG_TMP1 }, - { "shreax2", REG_EAX, REG_AX | REG_TMP1 }, - { "shreax3", REG_EAX, REG_AX | REG_TMP1 }, - { "shreax4", REG_EAX, REG_AX | REG_TMP1 }, + { "shreax1", REG_EAX, REG_EAX | REG_TMP1 }, + { "shreax2", REG_EAX, REG_EAX | REG_TMP1 }, + { "shreax3", REG_EAX, REG_EAX | REG_TMP1 }, + { "shreax4", REG_EAX, REG_EAXY | REG_TMP1 }, { "staspidx", REG_A | REG_Y, REG_Y | REG_TMP1 | REG_PTR1 }, - { "stax0sp", REG_AX, REG_Y }, - { "staxysp", REG_AXY, REG_Y }, + { "stax0sp", REG_AX, REG_Y }, + { "staxspidx", REG_AXY, REG_TMP1 | REG_PTR1 }, + { "staxysp", REG_AXY, REG_Y }, + { "steax0sp", REG_EAX, REG_Y }, + { "steaxysp", REG_EAXY, REG_Y }, + { "subeq0sp", REG_AX, REG_AXY }, + { "subeqysp", REG_AXY, REG_AXY }, + { "tosadd0ax", REG_AX, REG_EAXY | REG_TMP1 }, { "tosadda0", REG_A, REG_AXY }, { "tosaddax", REG_AX, REG_AXY }, + { "tosaddeax", REG_EAX, REG_EAXY | REG_TMP1 }, + { "tosand0ax", REG_AX, REG_EAX | REG_TMP1 }, + { "tosanda0", REG_A, REG_AXY }, + { "tosandax", REG_AX, REG_AXY }, + { "tosandeax", REG_EAX, REG_EAX | REG_TMP1 }, + { "tosaslax", REG_A, REG_AXY | REG_TMP1 }, + { "tosasleax", REG_A, REG_EAXY | REG_TMP1 }, + { "tosasrax", REG_A, REG_AXY | REG_TMP1 }, + { "tosasreax", REG_A, REG_EAXY | REG_TMP1 }, + { "tosdiv0ax", REG_AX, REG_ALL }, + { "tosdiva0", REG_A, REG_ALL }, + { "tosdivax", REG_AX, REG_ALL }, + { "tosdiveax", REG_EAX, REG_ALL }, + { "toseq00", REG_NONE, REG_AXY | REG_SREG }, + { "toseqa0", REG_A, REG_AXY | REG_SREG }, + { "toseqax", REG_AX, REG_AXY | REG_SREG }, + { "toseqeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosge00", REG_NONE, REG_AXY | REG_SREG }, + { "tosgea0", REG_A, REG_AXY | REG_SREG }, + { "tosgeax", REG_AX, REG_AXY | REG_SREG }, + { "tosgeeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosgt00", REG_NONE, REG_AXY | REG_SREG }, + { "tosgta0", REG_A, REG_AXY | REG_SREG }, + { "tosgtax", REG_AX, REG_AXY | REG_SREG }, + { "tosgteax", REG_EAX, REG_AXY | REG_PTR1 }, { "tosicmp", REG_AX, REG_AXY | REG_SREG }, - { "tosdiva0", REG_AX, REG_ALL }, - { "tosdivax", REG_AX, REG_ALL }, - { "tosdiveax", REG_EAX, REG_ALL }, - { "tosmula0", REG_AX, REG_ALL }, - { "tosmulax", REG_AX, REG_ALL }, - { "tosmuleax", REG_EAX, REG_ALL }, - { "tosshreax", REG_EAX, REG_EAXY | REG_PTR1 | REG_PTR2 }, - { "tosumula0", REG_AX, REG_ALL }, + { "tosicmp0", REG_A, REG_AXY | REG_SREG }, + { "toslcmp", REG_EAX, REG_A | REG_Y | REG_PTR1 }, + { "tosle00", REG_NONE, REG_AXY | REG_SREG }, + { "toslea0", REG_A, REG_AXY | REG_SREG }, + { "tosleax", REG_AX, REG_AXY | REG_SREG }, + { "tosleeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "toslt00", REG_NONE, REG_AXY | REG_SREG }, + { "toslta0", REG_A, REG_AXY | REG_SREG }, + { "tosltax", REG_AX, REG_AXY | REG_SREG }, + { "toslteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosmod0ax", REG_AX, REG_ALL }, + { "tosmodeax", REG_EAX, REG_ALL }, + { "tosmul0ax", REG_AX, REG_ALL }, + { "tosmula0", REG_A, REG_ALL }, + { "tosmulax", REG_AX, REG_ALL }, + { "tosmuleax", REG_EAX, REG_ALL }, + { "tosne00", REG_NONE, REG_AXY | REG_SREG }, + { "tosnea0", REG_A, REG_AXY | REG_SREG }, + { "tosneax", REG_AX, REG_AXY | REG_SREG }, + { "tosneeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosor0ax", REG_AX, REG_EAX | REG_TMP1 }, + { "tosora0", REG_A, REG_AXY | REG_TMP1 }, + { "tosorax", REG_AX, REG_AXY | REG_TMP1 }, + { "tosoreax", REG_EAX, REG_EAX | REG_TMP1 }, + { "tosrsub0ax", REG_AX, REG_EAX | REG_TMP1 }, + { "tosrsuba0", REG_A, REG_AX | REG_TMP1 }, + { "tosrsubax", REG_AX, REG_AX | REG_TMP1 }, + { "tosrsubeax", REG_EAX, REG_EAX | REG_TMP1 }, + { "tosshlax", REG_A, REG_AXY | REG_TMP1 }, + { "tosshleax", REG_A, REG_EAXY | REG_TMP1 }, + { "tosshrax", REG_A, REG_AXY | REG_TMP1 }, + { "tosshreax", REG_A, REG_EAXY | REG_TMP1 }, + { "tossub0ax", REG_AX, REG_EAXY }, + { "tossuba0", REG_A, REG_AXY }, + { "tossubax", REG_AX, REG_AXY }, + { "tossubeax", REG_EAX, REG_EAXY }, + { "tosudiv0ax", REG_AX, REG_ALL & ~REG_SAVE }, + { "tosudiva0", REG_A, REG_EAXY | REG_PTR1 }, /* also ptr4 */ + { "tosudivax", REG_AX, REG_EAXY | REG_PTR1 }, /* also ptr4 */ + { "tosudiveax", REG_EAX, REG_ALL & ~REG_SAVE }, + { "tosuge00", REG_NONE, REG_AXY | REG_SREG }, + { "tosugea0", REG_A, REG_AXY | REG_SREG }, + { "tosugeax", REG_AX, REG_AXY | REG_SREG }, + { "tosugeeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosugt00", REG_NONE, REG_AXY | REG_SREG }, + { "tosugta0", REG_A, REG_AXY | REG_SREG }, + { "tosugtax", REG_AX, REG_AXY | REG_SREG }, + { "tosugteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosule00", REG_NONE, REG_AXY | REG_SREG }, + { "tosulea0", REG_A, REG_AXY | REG_SREG }, + { "tosuleax", REG_AX, REG_AXY | REG_SREG }, + { "tosuleeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosult00", REG_NONE, REG_AXY | REG_SREG }, + { "tosulta0", REG_A, REG_AXY | REG_SREG }, + { "tosultax", REG_AX, REG_AXY | REG_SREG }, + { "tosulteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosumod0ax", REG_AX, REG_ALL & ~REG_SAVE }, + { "tosumoda0", REG_A, REG_EAXY | REG_PTR1 }, /* also ptr4 */ + { "tosumodax", REG_AX, REG_EAXY | REG_PTR1 }, /* also ptr4 */ + { "tosumodeax", REG_EAX, REG_ALL & ~REG_SAVE }, + { "tosumul0ax", REG_AX, REG_ALL }, + { "tosumula0", REG_A, REG_ALL }, { "tosumulax", REG_AX, REG_ALL }, { "tosumuleax", REG_EAX, REG_ALL }, + { "tosxor0ax", REG_AX, REG_EAX | REG_TMP1 }, + { "tosxora0", REG_A, REG_AX | REG_TMP1 }, + { "tosxorax", REG_AX, REG_AX | REG_TMP1 }, + { "tosxoreax", REG_EAX, REG_EAX | REG_TMP1 }, + { "tsteax", REG_EAX, REG_Y }, + { "utsteax", REG_EAX, REG_Y }, }; #define FuncInfoCount (sizeof(FuncInfoTable) / sizeof(FuncInfoTable[0])) @@ -217,21 +387,24 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) /* Did we find it in the top level table? */ if (E && IsTypeFunc (E->Type)) { + FuncDesc* D = E->V.F.Func; + /* A function may use the A or A/X registers if it is a fastcall * function. If it is not a fastcall function but a variadic one, * it will use the Y register (the parameter size is passed here). * In all other cases, no registers are used. However, we assume * that any function will destroy all registers. */ - FuncDesc* D = E->V.F.Func; - if ((D->Flags & FD_FASTCALL) != 0 && D->ParamCount > 0) { + if (IsQualFastcall (E->Type) && D->ParamCount > 0) { /* Will use registers depending on the last param */ - SymEntry* LastParam = D->SymTab->SymTail; - if (SizeOf (LastParam->Type) == 1) { + unsigned LastParamSize = CheckedSizeOf (D->LastParam->Type); + if (LastParamSize == 1) { *Use = REG_A; - } else { + } else if (LastParamSize == 2) { *Use = REG_AX; - } + } else { + *Use = REG_EAX; + } } else if ((D->Flags & FD_VARIADIC) != 0) { *Use = REG_Y; } else { @@ -246,6 +419,16 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) return; } + } else if (IsDigit (Name[0]) || Name[0] == '$') { + + /* A call to a numeric address. Assume that anything gets used and + * destroyed. This is not a real problem, since numeric addresses + * are used mostly in inline assembly anyway. + */ + *Use = REG_ALL; + *Chg = REG_ALL; + return; + } else { /* Search for the function in the list of builtin functions */ @@ -257,8 +440,19 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) /* Use the information we have */ *Use = Info->Use; *Chg = Info->Chg; - return; - } + } else { + /* It's an internal function we have no information for. If in + * debug mode, output an additional warning, so we have a chance + * to fix it. Otherwise assume that the internal function will + * use and change all registers. + */ + if (Debug) { + fprintf (stderr, "No info about internal function `%s'\n", Name); + } + *Use = REG_ALL; + *Chg = REG_ALL; + } + return; } /* Function not found - assume that the primary register is input, and all @@ -336,7 +530,7 @@ static unsigned GetRegInfo2 (CodeSeg* S, /* Evaluate the used registers */ R = E->Use; if (E->OPC == OP65_RTS || - ((E->Info & OF_BRA) != 0 && E->JumpTo == 0)) { + ((E->Info & OF_UBRA) != 0 && E->JumpTo == 0)) { /* This instruction will leave the function */ R |= S->ExitRegs; } @@ -392,30 +586,37 @@ static unsigned GetRegInfo2 (CodeSeg* S, */ } else if ((E->Info & OF_CBRA) != 0) { - if (E->JumpTo) { + /* Recursively determine register usage at the branch target */ + unsigned U1; + unsigned U2; - /* Recursively determine register usage at the branch target */ - unsigned U1; - unsigned U2; + if (E->JumpTo) { + /* Jump to internal label */ U1 = GetRegInfo2 (S, E->JumpTo->Owner, -1, Visited, Used, Unused, Wanted); - if (U1 == REG_ALL) { - /* All registers used, no need for second call */ - return REG_AXY; - } - if (Index < 0) { - Index = CS_GetEntryIndex (S, E); - } - if ((E = CS_GetEntry (S, ++Index)) == 0) { - Internal ("GetRegInfo2: No next entry!"); - } - U2 = GetRegInfo2 (S, E, Index, Visited, Used, Unused, Wanted); - return U1 | U2; /* Used in any of the branches */ - } else { - /* Jump to global symbol */ - break; - } + } else { + + /* Jump to external label. This will effectively exit the + * function, so we use the exitregs information here. + */ + U1 = S->ExitRegs; + + } + + /* Get the next entry */ + if (Index < 0) { + Index = CS_GetEntryIndex (S, E); + } + if ((E = CS_GetEntry (S, ++Index)) == 0) { + Internal ("GetRegInfo2: No next entry!"); + } + + /* Follow flow if branch not taken */ + U2 = GetRegInfo2 (S, E, Index, Visited, Used, Unused, Wanted); + + /* Registers are used if they're use in any of the branches */ + return U1 | U2; } else { @@ -438,7 +639,7 @@ static unsigned GetRegInfo2 (CodeSeg* S, } - + static unsigned GetRegInfo1 (CodeSeg* S, CodeEntry* E, int Index, @@ -523,5 +724,104 @@ int RegYUsed (struct CodeSeg* S, unsigned Index) +int RegAXUsed (struct CodeSeg* S, unsigned Index) +/* Check if the value in A or(!) the value in X are used. */ +{ + return (GetRegInfo (S, Index, REG_AX) & REG_AX) != 0; +} + + + +int RegEAXUsed (struct CodeSeg* S, unsigned Index) +/* Check if any of the four bytes in EAX are used. */ +{ + return (GetRegInfo (S, Index, REG_EAX) & REG_EAX) != 0; +} + + + +unsigned GetKnownReg (unsigned Use, const RegContents* RC) +/* Return the register or zero page location from the set in Use, thats + * contents are known. If Use does not contain any register, or if the + * register in question does not have a known value, return REG_NONE. + */ +{ + if ((Use & REG_A) != 0) { + return (RC == 0 || RC->RegA >= 0)? REG_A : REG_NONE; + } else if ((Use & REG_X) != 0) { + return (RC == 0 || RC->RegX >= 0)? REG_X : REG_NONE; + } else if ((Use & REG_Y) != 0) { + return (RC == 0 || RC->RegY >= 0)? REG_Y : REG_NONE; + } else if ((Use & REG_TMP1) != 0) { + return (RC == 0 || RC->Tmp1 >= 0)? REG_TMP1 : REG_NONE; + } else if ((Use & REG_PTR1_LO) != 0) { + return (RC == 0 || RC->Ptr1Lo >= 0)? REG_PTR1_LO : REG_NONE; + } else if ((Use & REG_PTR1_HI) != 0) { + return (RC == 0 || RC->Ptr1Hi >= 0)? REG_PTR1_HI : REG_NONE; + } else if ((Use & REG_SREG_LO) != 0) { + return (RC == 0 || RC->SRegLo >= 0)? REG_SREG_LO : REG_NONE; + } else if ((Use & REG_SREG_HI) != 0) { + return (RC == 0 || RC->SRegHi >= 0)? REG_SREG_HI : REG_NONE; + } else { + return REG_NONE; + } +} + + + +static cmp_t FindCmpCond (const char* Code, unsigned CodeLen) +/* Search for a compare condition by the given code using the given length */ +{ + unsigned I; + + /* Linear search */ + for (I = 0; I < sizeof (CmpSuffixTab) / sizeof (CmpSuffixTab [0]); ++I) { + if (strncmp (Code, CmpSuffixTab [I], CodeLen) == 0) { + /* Found */ + return I; + } + } + + /* Not found */ + return CMP_INV; +} + + + +cmp_t FindBoolCmpCond (const char* Name) +/* Check if the given string is the name of one of the boolean transformer + * subroutine, and if so, return the condition that is evaluated by this + * routine. Return CMP_INV if the condition is not recognised. + */ +{ + /* Check for the correct subroutine name */ + if (strncmp (Name, "bool", 4) == 0) { + /* Name is ok, search for the code in the table */ + return FindCmpCond (Name+4, strlen(Name)-4); + } else { + /* Not found */ + return CMP_INV; + } +} + + + +cmp_t FindTosCmpCond (const char* Name) +/* Check if this is a call to one of the TOS compare functions (tosgtax). + * Return the condition code or CMP_INV on failure. + */ +{ + unsigned Len = strlen (Name); + + /* Check for the correct subroutine name */ + if (strncmp (Name, "tos", 3) == 0 && strcmp (Name+Len-2, "ax") == 0) { + /* Name is ok, search for the code in the table */ + return FindCmpCond (Name+3, Len-3-2); + } else { + /* Not found */ + return CMP_INV; + } +} +