/* */
/* */
/* */
-/* (C) 2001 Ullrich von Bassewitz */
-/* Wacholderweg 14 */
-/* D-70597 Stuttgart */
-/* EMail: uz@musoftware.de */
+/* (C) 2001-2002 Ullrich von Bassewitz */
+/* Wacholderweg 14 */
+/* D-70597 Stuttgart */
+/* EMail: uz@musoftware.de */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
#include "chartype.h"
#include "check.h"
#include "xmalloc.h"
+#include "xsprintf.h"
/* cc65 */
#include "codeinfo.h"
static void SetUseChgInfo (CodeEntry* E, const OPCDesc* D)
/* Set the Use and Chg in E */
{
+ const ZPInfo* Info;
+
/* If this is a subroutine call, or a jump to an external function,
* lookup the information about this function and use it. The jump itself
* does not change any registers, so we don't need to use the data from D.
GetFuncInfo (E->Arg, &E->Use, &E->Chg);
} else {
/* Some other instruction. Use the values from the opcode description
- * plus addressing mode info
+ * plus addressing mode info.
*/
E->Use = D->Use | GetAMUseInfo (E->AM);
E->Chg = D->Chg;
+
+ /* Check for special zero page registers used */
+ switch (E->AM) {
+
+ case AM65_ACC:
+ if (E->OPC == OP65_ASL || E->OPC == OP65_DEC ||
+ E->OPC == OP65_INC || E->OPC == OP65_LSR ||
+ E->OPC == OP65_ROL || E->OPC == OP65_ROR) {
+ /* A is changed by these insns */
+ E->Chg |= REG_A;
+ }
+ break;
+
+ case AM65_ZP:
+ case AM65_ABS:
+ /* Be conservative: */
+ case AM65_ZPX:
+ case AM65_ABSX:
+ case AM65_ABSY:
+ Info = GetZPInfo (E->Arg);
+ if (Info && Info->ByteUse != REG_NONE) {
+ if (E->OPC == OP65_ASL || E->OPC == OP65_DEC ||
+ E->OPC == OP65_INC || E->OPC == OP65_LSR ||
+ E->OPC == OP65_ROL || E->OPC == OP65_ROR ||
+ E->OPC == OP65_TRB || E->OPC == OP65_TSB) {
+ /* The zp loc is both, input and output */
+ E->Chg |= Info->ByteUse;
+ E->Use |= Info->ByteUse;
+ } else if ((E->Info & OF_STORE) != 0) {
+ /* Just output */
+ E->Chg |= Info->ByteUse;
+ } else {
+ /* Input only */
+ E->Use |= Info->ByteUse;
+ }
+ }
+ break;
+
+ case AM65_ZPX_IND:
+ case AM65_ZP_INDY:
+ case AM65_ZP_IND:
+ Info = GetZPInfo (E->Arg);
+ if (Info && Info->ByteUse != REG_NONE) {
+ /* These addressing modes will never change the zp loc */
+ E->Use |= Info->WordUse;
+ }
+ break;
+
+ default:
+ /* Keep gcc silent */
+ break;
+ }
}
}
+const char* MakeHexArg (unsigned Num)
+/* Convert Num into a string in the form $XY, suitable for passing it as an
+ * argument to NewCodeEntry, and return a pointer to the string.
+ * BEWARE: The function returns a pointer to a static buffer, so the value is
+ * gone if you call it twice (and apart from that it's not thread and signal
+ * safe).
+ */
+{
+ static char Buf[16];
+ xsprintf (Buf, sizeof (Buf), "$%02X", (unsigned char) Num);
+ return Buf;
+}
+
+
+
CodeEntry* NewCodeEntry (opc_t OPC, am_t AM, const char* Arg,
CodeLabel* JumpTo, LineInfo* LI)
/* Create a new code entry, initialize and return it */
-void CE_SetArg (CodeEntry* E, const char* Arg)
-/* Set a new argument for the given code entry. An old string is deleted. */
+void CE_SetNumArg (CodeEntry* E, long Num)
+/* Set a new numeric argument for the given code entry that must already
+ * have a numeric argument.
+ */
{
+ char Buf[16];
+
+ /* Check that the entry has a numerical argument */
+ CHECK (E->Flags & CEF_NUMARG);
+
+ /* Make the new argument string */
+ if (E->Size == 2) {
+ Num &= 0xFF;
+ xsprintf (Buf, sizeof (Buf), "$%02X", (unsigned) Num);
+ } else if (E->Size == 3) {
+ Num &= 0xFFFF;
+ xsprintf (Buf, sizeof (Buf), "$%04X", (unsigned) Num);
+ } else {
+ Internal ("Invalid instruction size in CE_SetNumArg");
+ }
+
/* Free the old argument */
FreeArg (E->Arg);
/* Assign the new one */
- E->Arg = GetArgCopy (Arg);
+ E->Arg = GetArgCopy (Buf);
+
+ /* Use the new numerical value */
+ E->Num = Num;
}
+int CE_UseLoadFlags (const CodeEntry* E)
+/* Return true if the instruction uses any flags that are set by a load of
+ * a register (N and Z).
+ */
+{
+ /* A branch will use the flags */
+ if (E->Info & OF_FBRA) {
+ return 1;
+ }
+
+ /* Call of a boolean transformer routine will also use the flags */
+ if (E->OPC == OP65_JSR) {
+ /* Get the condition that is evaluated and check it */
+ switch (FindBoolCmpCond (E->Arg)) {
+ case CMP_EQ:
+ case CMP_NE:
+ case CMP_GT:
+ case CMP_GE:
+ case CMP_LT:
+ case CMP_LE:
+ case CMP_UGT:
+ case CMP_ULE:
+ case CMP_INV:
+ /* Will use the N or Z flags */
+ return 1;
+
+
+ case CMP_UGE: /* Uses only carry */
+ case CMP_ULT: /* Dito */
+ default: /* No bool transformer subroutine */
+ return 0;
+ }
+ }
+
+ /* Anything else */
+ return 0;
+}
+
+
+
void CE_FreeRegInfo (CodeEntry* E)
/* Free an existing register info struct */
{
RegContents* Out;
/* Function register usage */
- unsigned char Use, Chg;
+ unsigned short Use, Chg;
/* If we don't have a register info struct, allocate one. */
if (E->RI == 0) {
if (In->RegA >= 0) {
if (CE_KnownImm (E)) {
Out->RegA = In->RegA & (short) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use, In)) {
+ case REG_TMP1:
+ Out->RegA = In->RegA & In->Tmp1;
+ break;
+ case REG_SREG_LO:
+ Out->RegA = In->RegA & In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegA = In->RegA & In->SRegHi;
+ break;
+ default:
+ Out->RegA = -1;
+ break;
+ }
} else {
Out->RegA = -1;
}
case OP65_ASL:
if (E->AM == AM65_ACC && In->RegA >= 0) {
Out->RegA = (In->RegA << 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 << 1) & 0xFF;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = (In->SRegLo << 1) & 0xFF;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = (In->SRegHi << 1) & 0xFF;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
}
break;
case OP65_DEA:
if (In->RegA >= 0) {
- Out->RegA = In->RegA - 1;
+ Out->RegA = (In->RegA - 1) & 0xFF;
}
break;
case OP65_DEC:
if (E->AM == AM65_ACC && In->RegA >= 0) {
- Out->RegA = In->RegA - 1;
+ Out->RegA = (In->RegA - 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 - 1) & 0xFF;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = (In->SRegLo - 1) & 0xFF;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = (In->SRegHi - 1) & 0xFF;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
}
break;
case OP65_DEX:
if (In->RegX >= 0) {
- Out->RegX = In->RegX - 1;
+ Out->RegX = (In->RegX - 1) & 0xFF;
}
break;
case OP65_DEY:
if (In->RegY >= 0) {
- Out->RegY = In->RegY - 1;
+ Out->RegY = (In->RegY - 1) & 0xFF;
}
break;
if (In->RegA >= 0) {
if (CE_KnownImm (E)) {
Out->RegA = In->RegA ^ (short) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use, In)) {
+ case REG_TMP1:
+ Out->RegA = In->RegA ^ In->Tmp1;
+ break;
+ case REG_SREG_LO:
+ Out->RegA = In->RegA ^ In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegA = In->RegA ^ In->SRegHi;
+ break;
+ default:
+ Out->RegA = -1;
+ break;
+ }
} else {
Out->RegA = -1;
}
case OP65_INA:
if (In->RegA >= 0) {
- Out->RegA = In->RegA + 1;
+ Out->RegA = (In->RegA + 1) & 0xFF;
}
break;
case OP65_INC:
if (E->AM == AM65_ACC && In->RegA >= 0) {
- Out->RegA = In->RegA + 1;
+ Out->RegA = (In->RegA + 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 + 1) & 0xFF;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = (In->SRegLo + 1) & 0xFF;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = (In->SRegHi + 1) & 0xFF;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
}
break;
case OP65_INX:
if (In->RegX >= 0) {
- Out->RegX = In->RegX + 1;
+ Out->RegX = (In->RegX + 1) & 0xFF;
}
break;
case OP65_INY:
if (In->RegY >= 0) {
- Out->RegY = In->RegY + 1;
+ Out->RegY = (In->RegY + 1) & 0xFF;
}
break;
if (Chg & REG_Y) {
Out->RegY = -1;
}
+ if (Chg & REG_TMP1) {
+ Out->Tmp1 = -1;
+ }
+ if (Chg & REG_SREG_LO) {
+ Out->SRegLo = -1;
+ }
+ if (Chg & REG_SREG_HI) {
+ Out->SRegHi = -1;
+ }
+ /* ## FIXME: Quick hack for some known functions: */
+ if (strcmp (E->Arg, "tosandax") == 0) {
+ if (In->RegA == 0) {
+ Out->RegA = 0;
+ }
+ if (In->RegX == 0) {
+ Out->RegX = 0;
+ }
+ } else if (strcmp (E->Arg, "tosorax") == 0) {
+ if (In->RegA == 0xFF) {
+ Out->RegA = 0xFF;
+ }
+ if (In->RegX == 0xFF) {
+ Out->RegX = 0xFF;
+ }
+ } else if (FindBoolCmpCond (E->Arg) != CMP_INV) {
+ Out->RegX = 0;
+ }
break;
case OP65_JVC:
case OP65_LDA:
if (CE_KnownImm (E)) {
- Out->RegA = (unsigned char) E->Num;
+ Out->RegA = (unsigned char) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use, In)) {
+ case REG_TMP1:
+ Out->RegA = In->Tmp1;
+ break;
+ case REG_SREG_LO:
+ Out->RegA = In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegA = In->SRegHi;
+ break;
+ default:
+ Out->RegA = -1;
+ break;
+ }
} else {
- /* A is now unknown */
- Out->RegA = -1;
+ /* A is now unknown */
+ Out->RegA = -1;
}
break;
case OP65_LDX:
if (CE_KnownImm (E)) {
- Out->RegX = (unsigned char) E->Num;
+ Out->RegX = (unsigned char) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use, In)) {
+ case REG_TMP1:
+ Out->RegX = In->Tmp1;
+ break;
+ case REG_SREG_LO:
+ Out->RegX = In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegX = In->SRegHi;
+ break;
+ default:
+ Out->RegX = -1;
+ break;
+ }
} else {
- /* X is now unknown */
- Out->RegX = -1;
+ /* X is now unknown */
+ Out->RegX = -1;
}
break;
case OP65_LDY:
if (CE_KnownImm (E)) {
- Out->RegY = (unsigned char) E->Num;
+ Out->RegY = (unsigned char) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use, In)) {
+ case REG_TMP1:
+ Out->RegY = In->Tmp1;
+ break;
+ case REG_SREG_LO:
+ Out->RegY = In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegY = In->SRegHi;
+ break;
+ default:
+ Out->RegY = -1;
+ break;
+ }
} else {
/* Y is now unknown */
Out->RegY = -1;
case OP65_LSR:
if (E->AM == AM65_ACC && In->RegA >= 0) {
Out->RegA = (In->RegA >> 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 >> 1) & 0xFF;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = (In->SRegLo >> 1) & 0xFF;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = (In->SRegHi >> 1) & 0xFF;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
}
break;
if (In->RegA >= 0) {
if (CE_KnownImm (E)) {
Out->RegA = In->RegA | (short) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use, In)) {
+ case REG_TMP1:
+ Out->RegA = In->RegA | In->Tmp1;
+ break;
+ case REG_SREG_LO:
+ Out->RegA = In->RegA | In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegA = In->RegA | In->SRegHi;
+ break;
+ default:
+ Out->RegA = -1;
+ break;
+ }
} else {
/* A is now unknown */
Out->RegA = -1;
case OP65_PLP:
break;
- case OP65_PLX:
- Out->RegX = -1;
- break;
+ case OP65_PLX:
+ Out->RegX = -1;
+ break;
- case OP65_PLY:
- Out->RegY = -1;
- break;
+ case OP65_PLY:
+ Out->RegY = -1;
+ break;
- case OP65_ROL:
- Out->RegA = -1;
- break;
+ case OP65_ROL:
+ /* We don't know the value of the carry bit */
+ if (E->AM == AM65_ACC) {
+ Out->RegA = -1;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = -1;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = -1;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = -1;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ }
+ break;
- case OP65_ROR:
- Out->RegA = -1;
- break;
+ case OP65_ROR:
+ /* We don't know the value of the carry bit */
+ if (E->AM == AM65_ACC) {
+ Out->RegA = -1;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = -1;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = -1;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = -1;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ }
+ break;
- case OP65_RTI:
- break;
+ case OP65_RTI:
+ break;
- case OP65_RTS:
- break;
+ case OP65_RTS:
+ break;
- case OP65_SBC:
- /* We don't know the value of the carry bit */
- Out->RegA = -1;
- break;
+ case OP65_SBC:
+ /* We don't know the value of the carry bit */
+ Out->RegA = -1;
+ break;
- case OP65_SEC:
- break;
+ case OP65_SEC:
+ break;
- case OP65_SED:
- break;
+ case OP65_SED:
+ break;
- case OP65_SEI:
- break;
+ case OP65_SEI:
+ break;
- case OP65_STA:
+ case OP65_STA:
+ if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = In->RegA;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = In->RegA;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = In->RegA;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ }
break;
case OP65_STX:
+ if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = In->RegX;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = In->RegX;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = In->RegX;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ }
break;
case OP65_STY:
+ if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = In->RegY;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = In->RegY;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = In->RegY;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ }
+ break;
+
+ case OP65_STZ:
+ if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = 0;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = 0;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = 0;
+ break;
+ }
+ } else if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ }
break;
case OP65_TAX:
break;
case OP65_TRB:
- /* For now... */
- Out->RegA = -1;
+ if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ } else if (E->AM == AM65_ZP) {
+ if (In->RegA >= 0) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 &= ~In->RegA;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo &= ~In->RegA;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi &= ~In->RegA;
+ break;
+ }
+ } else {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = -1;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = -1;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = -1;
+ break;
+ }
+ }
+ }
break;
case OP65_TSB:
- /* For now... */
- Out->RegA = -1;
+ if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ } else if (E->AM == AM65_ZP) {
+ if (In->RegA >= 0) {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 |= In->RegA;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo |= In->RegA;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi |= In->RegA;
+ break;
+ }
+ } else {
+ switch (GetKnownReg (E->Chg, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = -1;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = -1;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = -1;
+ break;
+ }
+ }
+ }
break;
case OP65_TSX:
+static char* RegInfoDesc (unsigned U, char* Buf)
+/* Return a string containing register info */
+{
+ Buf[0] = '\0';
+
+ strcat (Buf, U & REG_SREG_HI? "H" : "_");
+ strcat (Buf, U & REG_SREG_LO? "L" : "_");
+ strcat (Buf, U & REG_A? "A" : "_");
+ strcat (Buf, U & REG_X? "X" : "_");
+ strcat (Buf, U & REG_Y? "Y" : "_");
+ strcat (Buf, U & REG_TMP1? "T1" : "__");
+ strcat (Buf, U & REG_PTR1? "1" : "_");
+ strcat (Buf, U & REG_PTR2? "2" : "_");
+ strcat (Buf, U & REG_SAVE? "V" : "_");
+
+ return Buf;
+}
+
+
+
void CE_Output (const CodeEntry* E, FILE* F)
/* Output the code entry to a file */
{
case AM65_ABS:
/* zeropage and absolute */
Chars += fprintf (F, "%*s%s", 9-Chars, "", E->Arg);
- break;
+ break;
case AM65_ZPX:
case AM65_ABSX:
/* Print usage info if requested by the debugging flag */
if (Debug) {
- fprintf (F,
- "%*s; USE: %c%c%c CHG: %c%c%c SIZE: %u\n",
- 30-Chars, "",
- (E->Use & REG_A)? 'A' : '_',
- (E->Use & REG_X)? 'X' : '_',
- (E->Use & REG_Y)? 'Y' : '_',
- (E->Chg & REG_A)? 'A' : '_',
- (E->Chg & REG_X)? 'X' : '_',
- (E->Chg & REG_Y)? 'Y' : '_',
- E->Size);
+ char Use [128];
+ char Chg [128];
+ fprintf (F,
+ "%*s; USE: %-20s CHG: %-20s SIZE: %u\n",
+ 30-Chars, "",
+ RegInfoDesc (E->Use, Use),
+ RegInfoDesc (E->Chg, Chg),
+ E->Size);
} else {
/* Terminate the line */
fprintf (F, "\n");
projects / cc65 / blobdiff