+void CE_ReplaceOPC (CodeEntry* E, opc_t OPC)
+/* Replace the opcode of the instruction. This will also replace related info,
+ * Size, Use and Chg, but it will NOT update any arguments or labels.
+ */
+{
+ /* Get the opcode descriptor */
+ const OPCDesc* D = GetOPCDesc (OPC);
+
+ /* Replace the opcode */
+ E->OPC = OPC;
+ E->Info = D->Info;
+ E->Size = GetInsnSize (E->OPC, E->AM);
+ SetUseChgInfo (E, D);
+}
+
+
+
+int CodeEntriesAreEqual (const CodeEntry* E1, const CodeEntry* E2)
+/* Check if both code entries are equal */
+{
+ return E1->OPC == E2->OPC && E1->AM == E2->AM && strcmp (E1->Arg, E2->Arg) == 0;
+}
+
+
+
+void CE_AttachLabel (CodeEntry* E, CodeLabel* L)
+/* Attach the label to the entry */
+{
+ /* Add it to the entries label list */
+ CollAppend (&E->Labels, L);
+
+ /* Tell the label about it's owner */
+ L->Owner = E;
+}
+
+
+
+void CE_MoveLabel (CodeLabel* L, CodeEntry* E)
+/* Move the code label L from it's former owner to the code entry E. */
+{
+ /* Delete the label from the owner */
+ CollDeleteItem (&L->Owner->Labels, L);
+
+ /* Set the new owner */
+ CollAppend (&E->Labels, L);
+ L->Owner = E;
+}
+
+
+
+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 (Buf);
+
+ /* Use the new numerical value */
+ E->Num = Num;
+}
+
+
+
+int CE_KnownImm (const CodeEntry* E)
+/* Return true if the argument of E is a known immediate value */
+{
+ return (E->AM == AM65_IMM && (E->Flags & CEF_NUMARG) != 0);
+}
+
+
+
+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 */
+{
+ if (E->RI) {
+ FreeRegInfo (E->RI);
+ E->RI = 0;
+ }
+}
+
+
+
+void CE_GenRegInfo (CodeEntry* E, RegContents* InputRegs)
+/* Generate register info for this instruction. If an old info exists, it is
+ * overwritten.
+ */
+{
+ /* Pointers to the register contents */
+ RegContents* In;
+ RegContents* Out;
+
+ /* Function register usage */
+ unsigned short Use, Chg;
+
+ /* If we don't have a register info struct, allocate one. */
+ if (E->RI == 0) {
+ E->RI = NewRegInfo (InputRegs);
+ } else {
+ if (InputRegs) {
+ E->RI->In = *InputRegs;
+ } else {
+ RC_Invalidate (&E->RI->In);
+ }
+ E->RI->Out2 = E->RI->Out = E->RI->In;
+ }
+
+ /* Get pointers to the register contents */
+ In = &E->RI->In;
+ Out = &E->RI->Out;
+
+ /* Handle the different instructions */
+ switch (E->OPC) {
+
+ case OP65_ADC:
+ /* We don't know the value of the carry, so the result is
+ * always unknown.
+ */
+ Out->RegA = -1;
+ break;
+
+ case OP65_AND:
+ 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;
+ }
+ }
+ break;
+
+ 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_BCC:
+ break;
+
+ case OP65_BCS:
+ break;
+
+ case OP65_BEQ:
+ break;
+
+ case OP65_BIT:
+ break;
+
+ case OP65_BMI:
+ break;
+
+ case OP65_BNE:
+ break;
+
+ case OP65_BPL:
+ break;
+
+ case OP65_BRA:
+ break;
+
+ case OP65_BRK:
+ break;
+
+ case OP65_BVC:
+ break;
+
+ case OP65_BVS:
+ break;
+
+ case OP65_CLC:
+ break;
+
+ case OP65_CLD:
+ break;
+
+ case OP65_CLI:
+ break;
+
+ case OP65_CLV:
+ break;
+
+ case OP65_CMP:
+ break;
+
+ case OP65_CPX:
+ break;
+
+ case OP65_CPY:
+ break;
+
+ case OP65_DEA:
+ if (In->RegA >= 0) {
+ Out->RegA = (In->RegA - 1) & 0xFF;
+ }
+ break;
+
+ case OP65_DEC:
+ 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_DEX:
+ if (In->RegX >= 0) {
+ Out->RegX = (In->RegX - 1) & 0xFF;
+ }
+ break;
+
+ case OP65_DEY:
+ if (In->RegY >= 0) {
+ Out->RegY = (In->RegY - 1) & 0xFF;
+ }
+ break;
+
+ case OP65_EOR:
+ 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;
+ }
+ }
+ break;
+
+ case OP65_INA:
+ if (In->RegA >= 0) {
+ Out->RegA = (In->RegA + 1) & 0xFF;
+ }
+ break;
+
+ case OP65_INC:
+ 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_INX:
+ if (In->RegX >= 0) {
+ Out->RegX = (In->RegX + 1) & 0xFF;
+ }
+ break;
+
+ case OP65_INY:
+ if (In->RegY >= 0) {
+ Out->RegY = (In->RegY + 1) & 0xFF;
+ }
+ break;
+
+ case OP65_JCC:
+ break;
+
+ case OP65_JCS:
+ break;
+
+ case OP65_JEQ:
+ break;
+
+ case OP65_JMI:
+ break;
+
+ case OP65_JMP:
+ break;
+
+ case OP65_JNE:
+ break;
+
+ case OP65_JPL:
+ break;
+
+ case OP65_JSR:
+ /* Get the code info for the function */
+ GetFuncInfo (E->Arg, &Use, &Chg);
+ if (Chg & REG_A) {
+ Out->RegA = -1;
+ }
+ if (Chg & REG_X) {
+ Out->RegX = -1;
+ }
+ 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:
+ break;
+
+ case OP65_JVS:
+ break;
+
+ case OP65_LDA:
+ if (CE_KnownImm (E)) {
+ 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;
+ }
+ break;
+
+ case OP65_LDX:
+ if (CE_KnownImm (E)) {
+ 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;
+ }
+ break;
+
+ case OP65_LDY:
+ if (CE_KnownImm (E)) {
+ 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;
+ }
+ break;
+
+ 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;
+
+ case OP65_NOP:
+ break;
+
+ case OP65_ORA:
+ 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;
+ }
+ }
+ break;
+
+ case OP65_PHA:
+ break;
+
+ case OP65_PHP:
+ break;
+
+ case OP65_PHX:
+ break;
+
+ case OP65_PHY:
+ break;
+
+ case OP65_PLA:
+ Out->RegA = -1;
+ break;
+
+ case OP65_PLP:
+ break;
+
+ case OP65_PLX:
+ Out->RegX = -1;
+ break;
+
+ case OP65_PLY:
+ Out->RegY = -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:
+ /* 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_RTS:
+ break;
+
+ case OP65_SBC:
+ /* We don't know the value of the carry bit */
+ Out->RegA = -1;
+ break;
+
+ case OP65_SEC:
+ break;
+
+ case OP65_SED:
+ break;
+
+ case OP65_SEI:
+ break;
+
+ 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:
+ Out->RegX = In->RegA;
+ break;
+
+ case OP65_TAY:
+ Out->RegY = In->RegA;
+ break;
+
+ case OP65_TRB:
+ 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:
+ 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:
+ Out->RegX = -1;
+ break;
+
+ case OP65_TXA:
+ Out->RegA = In->RegX;
+ break;
+
+ case OP65_TXS:
+ break;
+
+ case OP65_TYA:
+ Out->RegA = In->RegY;
+ break;
+
+ default:
+ break;
+
+ }
+}
+
+
+
+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)