X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fcc65%2Fcodeinfo.c;h=cf04baf9c3a39808af1ce192f12441896b37e20c;hb=92dfde6c4e748946c5e13323bb48bf2abd72c2b3;hp=43803840e766c852e0136613d4035929d4afa7f5;hpb=a6aa5512d5f8f17340ea1a5e701099cd4d6ec5f4;p=cc65 diff --git a/src/cc65/codeinfo.c b/src/cc65/codeinfo.c index 43803840e..cf04baf9c 100644 --- a/src/cc65/codeinfo.c +++ b/src/cc65/codeinfo.c @@ -6,7 +6,7 @@ /* */ /* */ /* */ -/* (C) 2001 Ullrich von Bassewitz */ +/* (C) 2001-2002 Ullrich von Bassewitz */ /* Wacholderweg 14 */ /* D-70597 Stuttgart */ /* EMail: uz@cc65.org */ @@ -44,6 +44,7 @@ #include "codeseg.h" #include "datatype.h" #include "error.h" +#include "reginfo.h" #include "symtab.h" #include "codeinfo.h" @@ -55,6 +56,11 @@ +/* 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. */ @@ -66,117 +72,179 @@ struct FuncInfo { }; static const FuncInfo FuncInfoTable[] = { - { "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 }, - { "bnega", REG_A, REG_AX }, - { "bnegax", REG_AX, REG_AX }, - { "bnegeax", REG_EAX, REG_EAX }, - { "booleq", REG_NONE, REG_AX }, - { "boolge", REG_NONE, REG_AX }, - { "boolgt", REG_NONE, REG_AX }, - { "boolle", 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 }, - { "complax", REG_AX, REG_AX }, - { "decax1", REG_AX, REG_AX }, - { "decax2", REG_AX, REG_AX }, - { "decax3", REG_AX, REG_AX }, - { "decax4", REG_AX, REG_AX }, - { "decax5", REG_AX, REG_AX }, - { "decax6", REG_AX, REG_AX }, - { "decax7", REG_AX, REG_AX }, - { "decax8", REG_AX, REG_AX }, - { "decaxy", REG_AXY, REG_AX | REG_TMP1 }, - { "decsp1", REG_NONE, REG_Y }, - { "decsp2", REG_NONE, REG_A }, - { "decsp3", REG_NONE, REG_A }, - { "decsp4", REG_NONE, REG_A }, - { "decsp5", REG_NONE, REG_A }, - { "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 }, - { "incsp1", REG_NONE, REG_NONE }, - { "incsp2", REG_NONE, REG_Y }, - { "incsp3", REG_NONE, REG_Y }, - { "incsp4", REG_NONE, REG_Y }, - { "incsp5", REG_NONE, REG_Y }, - { "incsp6", REG_NONE, REG_Y }, - { "incsp7", REG_NONE, REG_Y }, - { "incsp8", REG_NONE, REG_Y }, - { "ldaidx", REG_AXY, REG_AX | REG_PTR1 }, - { "ldauidx", REG_AXY, REG_AX | REG_PTR1 }, - { "ldax0sp", REG_Y, REG_AX }, - { "ldaxi", REG_AX, REG_AXY | REG_PTR1 }, - { "ldaxidx", REG_AXY, REG_AX | REG_PTR1 }, - { "ldaxysp", REG_Y, REG_AX }, - { "leaasp", REG_A, REG_AX }, - { "negax", REG_AX, REG_AX }, - { "pusha", REG_A, REG_Y }, - { "pusha0", REG_A, REG_XY }, - { "pushax", REG_AX, REG_Y }, - { "pusheax", REG_EAX, REG_Y }, - { "pushw0sp", REG_NONE, REG_AXY }, - { "pushwysp", REG_Y, REG_AXY }, - { "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 }, - { "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 }, - { "staspidx", REG_A | REG_Y, REG_Y | REG_TMP1 | REG_PTR1 }, - { "stax0sp", REG_AX, REG_Y }, - { "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 }, - { "tosumulax", REG_AX, REG_ALL }, - { "tosumuleax", REG_EAX, REG_ALL }, + { "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 }, + { "bnega", REG_A, REG_AX }, + { "bnegax", REG_AX, REG_AX }, + { "bnegeax", REG_EAX, REG_EAX }, + { "booleq", REG_NONE, REG_AX }, + { "boolge", REG_NONE, REG_AX }, + { "boolgt", REG_NONE, REG_AX }, + { "boolle", 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 }, + { "complax", REG_AX, REG_AX }, + { "decax1", REG_AX, REG_AX }, + { "decax2", REG_AX, REG_AX }, + { "decax3", REG_AX, REG_AX }, + { "decax4", REG_AX, REG_AX }, + { "decax5", REG_AX, REG_AX }, + { "decax6", REG_AX, REG_AX }, + { "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 }, + { "decsp4", REG_NONE, REG_A }, + { "decsp5", REG_NONE, REG_A }, + { "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 }, + { "incsp1", REG_NONE, REG_NONE }, + { "incsp2", REG_NONE, REG_Y }, + { "incsp3", REG_NONE, REG_Y }, + { "incsp4", REG_NONE, REG_Y }, + { "incsp5", REG_NONE, REG_Y }, + { "incsp6", REG_NONE, REG_Y }, + { "incsp7", REG_NONE, REG_Y }, + { "incsp8", REG_NONE, REG_Y }, + { "laddeq", REG_EAXY|REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "laddeq1", REG_Y | REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "laddeqa", REG_AY | REG_PTR1_LO, REG_EAXY | REG_PTR1_HI }, + { "laddeq0sp", REG_EAX, REG_EAXY }, + { "laddeqysp", REG_EAXY, REG_EAXY }, + { "ldaidx", REG_AXY, REG_AX | REG_PTR1 }, + { "ldauidx", REG_AXY, REG_AX | REG_PTR1 }, + { "ldax0sp", REG_NONE, REG_AXY }, + { "ldaxi", REG_AX, REG_AXY | REG_PTR1 }, + { "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 }, + { "leaasp", REG_A, 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 }, + { "lsubeq0sp", REG_EAX, REG_EAXY }, + { "negax", REG_AX, REG_AX }, + { "push0", REG_NONE, REG_AXY }, + { "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 }, + { "pusha0sp", REG_NONE, REG_AY }, + { "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 }, + { "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 }, + { "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 }, + { "staspidx", REG_A | REG_Y, REG_Y | REG_TMP1 | REG_PTR1 }, + { "stax0sp", REG_AX, REG_Y }, + { "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 }, + { "tosadda0", REG_A, REG_AXY }, + { "tosaddax", REG_AX, REG_AXY }, + { "tosanda0", REG_A, REG_AXY }, + { "tosandax", REG_AX, REG_AXY }, + { "tosdiva0", REG_AY, REG_ALL }, + { "tosdivax", REG_AXY, REG_ALL }, + { "tosdiveax", REG_EAXY, REG_ALL }, + { "toseqeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosgeeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosgteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosicmp", REG_AX, REG_AXY | REG_SREG }, + { "toslcmp", REG_EAX, REG_A | REG_Y | REG_PTR1 }, + { "tosleeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "toslteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosmula0", REG_AX, REG_ALL }, + { "tosmulax", REG_AX, REG_ALL }, + { "tosmuleax", REG_EAX, REG_ALL }, + { "tosneeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosshreax", REG_EAX, REG_EAXY | REG_PTR1 | REG_PTR2 }, + { "tossuba0", REG_A, REG_AXY }, + { "tossubax", REG_AX, REG_AXY }, + { "tossubeax", REG_EAX, REG_EAXY }, + { "tosugeeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosugteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosuleeax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosulteax", REG_EAX, REG_AXY | REG_PTR1 }, + { "tosumula0", REG_AX, REG_ALL }, + { "tosumulax", REG_AX, REG_ALL }, + { "tosumuleax", REG_EAX, REG_ALL }, + { "tsteax", REG_EAX, REG_Y }, + { "utsteax", REG_EAX, REG_Y }, }; #define FuncInfoCount (sizeof(FuncInfoTable) / sizeof(FuncInfoTable[0])) /* Table with names of zero page locations used by the compiler */ -typedef struct ZPInfo ZPInfo; -struct ZPInfo { - unsigned char Len; /* Length of the following string */ - char Name[11]; /* Name of zero page symbol */ - unsigned short RegInfo; /* Register info for this symbol */ -}; static const ZPInfo ZPInfoTable[] = { - { 4, "ptr1", REG_PTR1 }, - { 4, "ptr2", REG_PTR2 }, - { 4, "ptr3", REG_PTR3 }, - { 4, "ptr4", REG_PTR4 }, - { 7, "regbank", REG_NONE }, - { 7, "regsave", REG_NONE }, - { 2, "sp", REG_NONE }, - { 4, "sreg", REG_SREG }, - { 4, "tmp1", REG_TMP1 }, - { 4, "tmp2", REG_TMP2 }, - { 4, "tmp3", REG_TMP3 }, + { 0, "ptr1", REG_PTR1_LO, REG_PTR1 }, + { 0, "ptr1+1", REG_PTR1_HI, REG_PTR1 }, + { 0, "ptr2", REG_PTR2_LO, REG_PTR2 }, + { 0, "ptr2+1", REG_PTR2_HI, REG_PTR2 }, + { 4, "ptr3", REG_NONE, REG_NONE }, + { 4, "ptr4", REG_NONE, REG_NONE }, + { 7, "regbank", REG_NONE, REG_NONE }, + { 0, "regsave", REG_SAVE_LO, REG_SAVE }, + { 0, "regsave+1", REG_SAVE_HI, REG_SAVE }, + { 0, "sp", REG_SP_LO, REG_SP }, + { 0, "sp+1", REG_SP_HI, REG_SP }, + { 0, "sreg", REG_SREG_LO, REG_SREG }, + { 0, "sreg+1", REG_SREG_HI, REG_SREG }, + { 0, "tmp1", REG_TMP1, REG_TMP1 }, + { 0, "tmp2", REG_NONE, REG_NONE }, + { 0, "tmp3", REG_NONE, REG_NONE }, + { 0, "tmp4", REG_NONE, REG_NONE }, }; #define ZPInfoCount (sizeof(ZPInfoTable) / sizeof(ZPInfoTable[0])) + /*****************************************************************************/ /* Code */ /*****************************************************************************/ @@ -220,11 +288,14 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) if ((D->Flags & FD_FASTCALL) != 0 && D->ParamCount > 0) { /* Will use registers depending on the last param */ SymEntry* LastParam = D->SymTab->SymTail; - if (SizeOf (LastParam->Type) == 1) { + unsigned LastParamSize = CheckedSizeOf (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 { @@ -241,7 +312,7 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) } else { - /* Search for the function in the list of builtin functions */ + /* Search for the function in the list of builtin functions */ const FuncInfo* Info = bsearch (Name, FuncInfoTable, FuncInfoCount, sizeof(FuncInfo), CompareFuncInfo); @@ -254,49 +325,50 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) } } - /* Function not found - assume all CPU registers are input, and all + /* Function not found - assume that the primary register is input, and all * registers are changed */ - *Use = REG_AXY; + *Use = REG_EAXY; *Chg = REG_ALL; } -int IsZPName (const char* Name, unsigned short* RegInfo) -/* Return true if the given name is a zero page symbol. If the RegInfo - * pointer is not NULL, it is filled with the register info for the - * zero page location found. - */ +static int CompareZPInfo (const void* Name, const void* Info) +/* Compare function for bsearch */ { - unsigned I; - const ZPInfo* Info; - - /* Because of the low number of symbols, we do a linear search here */ - for (I = 0, Info = ZPInfoTable; I < ZPInfoCount; ++I, ++Info) { - if (strncmp (Name, Info->Name, Info->Len) == 0 && - (Name[Info->Len] == '\0' || Name[Info->Len] == '+')) { - /* Found */ - if (RegInfo) { - *RegInfo = Info->RegInfo; - } - return 1; - } - } + /* Cast the pointers to the correct data type */ + const char* N = (const char*) Name; + const ZPInfo* E = (const ZPInfo*) Info; - /* Not found */ - return 0; + /* Do the compare. Be careful because of the length (Info may contain + * more than just the zeropage name). + */ + if (E->Len == 0) { + /* Do a full compare */ + return strcmp (N, E->Name); + } else { + /* Only compare the first part */ + int Res = strncmp (N, E->Name, E->Len); + if (Res == 0 && (N[E->Len] != '\0' && N[E->Len] != '+')) { + /* Name is actually longer than Info->Name */ + Res = -1; + } + return Res; + } } -static unsigned GetRegInfo1 (CodeSeg* S, - CodeEntry* E, - int Index, - Collection* Visited, - unsigned Used, - unsigned Unused); -/* Recursively called subfunction for GetRegInfo. */ +const ZPInfo* GetZPInfo (const char* Name) +/* If the given name is a zero page symbol, return a pointer to the info + * struct for this symbol, otherwise return NULL. + */ +{ + /* Search for the zp location in the list */ + return bsearch (Name, ZPInfoTable, ZPInfoCount, + sizeof(ZPInfo), CompareZPInfo); +} @@ -305,7 +377,8 @@ static unsigned GetRegInfo2 (CodeSeg* S, int Index, Collection* Visited, unsigned Used, - unsigned Unused) + unsigned Unused, + unsigned Wanted) /* Recursively called subfunction for GetRegInfo. */ { /* Follow the instruction flow recording register usage. */ @@ -351,7 +424,7 @@ static unsigned GetRegInfo2 (CodeSeg* S, } /* If we know about all registers now, bail out */ - if ((Used | Unused) == REG_AXY) { + if (((Used | Unused) & Wanted) == Wanted) { break; } @@ -370,7 +443,7 @@ static unsigned GetRegInfo2 (CodeSeg* S, /* Unconditional jump */ E = E->JumpTo->Owner; - Index = -1; /* Invalidate */ + Index = -1; /* Invalidate */ } else { /* Jump outside means we're done */ @@ -389,8 +462,8 @@ static unsigned GetRegInfo2 (CodeSeg* S, unsigned U1; unsigned U2; - U1 = GetRegInfo1 (S, E->JumpTo->Owner, -1, Visited, Used, Unused); - if (U1 == REG_AXY) { + 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; } @@ -400,7 +473,7 @@ static unsigned GetRegInfo2 (CodeSeg* S, if ((E = CS_GetEntry (S, ++Index)) == 0) { Internal ("GetRegInfo2: No next entry!"); } - U2 = GetRegInfo1 (S, E, Index, Visited, Used, Unused); + U2 = GetRegInfo2 (S, E, Index, Visited, Used, Unused, Wanted); return U1 | U2; /* Used in any of the branches */ } else { @@ -435,14 +508,15 @@ static unsigned GetRegInfo1 (CodeSeg* S, int Index, Collection* Visited, unsigned Used, - unsigned Unused) + unsigned Unused, + unsigned Wanted) /* Recursively called subfunction for GetRegInfo. */ { /* Remember the current count of the line collection */ unsigned Count = CollCount (Visited); /* Call the worker routine */ - unsigned R = GetRegInfo2 (S, E, Index, Visited, Used, Unused); + unsigned R = GetRegInfo2 (S, E, Index, Visited, Used, Unused, Wanted); /* Restore the old count, unmarking all new entries */ unsigned NewCount = CollCount (Visited); @@ -458,7 +532,7 @@ static unsigned GetRegInfo1 (CodeSeg* S, -unsigned GetRegInfo (struct CodeSeg* S, unsigned Index) +unsigned GetRegInfo (struct CodeSeg* S, unsigned Index, unsigned Wanted) /* Determine register usage information for the instructions starting at the * given index. */ @@ -478,7 +552,7 @@ unsigned GetRegInfo (struct CodeSeg* S, unsigned Index) InitCollection (&Visited); /* Call the recursive subfunction */ - R = GetRegInfo1 (S, E, Index, &Visited, REG_NONE, REG_NONE); + R = GetRegInfo1 (S, E, Index, &Visited, REG_NONE, REG_NONE, Wanted); /* Delete the line collection */ DoneCollection (&Visited); @@ -492,7 +566,7 @@ unsigned GetRegInfo (struct CodeSeg* S, unsigned Index) int RegAUsed (struct CodeSeg* S, unsigned Index) /* Check if the value in A is used. */ { - return (GetRegInfo (S, Index) & REG_A) != 0; + return (GetRegInfo (S, Index, REG_A) & REG_A) != 0; } @@ -500,7 +574,7 @@ int RegAUsed (struct CodeSeg* S, unsigned Index) int RegXUsed (struct CodeSeg* S, unsigned Index) /* Check if the value in X is used. */ { - return (GetRegInfo (S, Index) & REG_X) != 0; + return (GetRegInfo (S, Index, REG_X) & REG_X) != 0; } @@ -508,10 +582,105 @@ int RegXUsed (struct CodeSeg* S, unsigned Index) int RegYUsed (struct CodeSeg* S, unsigned Index) /* Check if the value in Y is used. */ { - return (GetRegInfo (S, Index) & REG_Y) != 0; + return (GetRegInfo (S, Index, REG_Y) & REG_Y) != 0; } +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_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; + } +} +