X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fcc65%2Fcodeinfo.c;h=322b471ff0e8109a9bfb0d906d870ff67a7cb614;hb=4a667ead00c10797fb57298b3dd33c2efc6c8d3f;hp=9dd6e9b95214e85df3715b4cbbc37edce4995a78;hpb=5d0a52b7accc43672275d6331c576c2512b1074b;p=cc65 diff --git a/src/cc65/codeinfo.c b/src/cc65/codeinfo.c index 9dd6e9b95..322b471ff 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. */ @@ -66,6 +72,8 @@ struct FuncInfo { }; 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 }, @@ -94,6 +102,7 @@ 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 }, @@ -115,20 +124,50 @@ static const FuncInfo FuncInfoTable[] = { { "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_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 }, + { "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 }, @@ -142,19 +181,43 @@ static const FuncInfo FuncInfoTable[] = { { "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 }, + { "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 }, - { "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 }, + { "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])) @@ -164,22 +227,24 @@ static const ZPInfo ZPInfoTable[] = { { 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 }, + { 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 }, - { 2, "sp", REG_NONE, REG_NONE }, + { 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 }, + { 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 */ /*****************************************************************************/ @@ -222,12 +287,14 @@ void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg) FuncDesc* D = E->V.F.Func; 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 (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 { @@ -395,7 +462,7 @@ static unsigned GetRegInfo2 (CodeSeg* S, unsigned U2; U1 = GetRegInfo2 (S, E->JumpTo->Owner, -1, Visited, Used, Unused, Wanted); - if (U1 == REG_AXY) { + if (U1 == REG_ALL) { /* All registers used, no need for second call */ return REG_AXY; } @@ -519,5 +586,104 @@ 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; + } +} +