CodeEntry* NewCodeEntry (opc_t OPC, am_t AM, const char* Arg,
- CodeLabel* JumpTo, LineInfo* LI)
+ CodeLabel* JumpTo, LineInfo* LI)
/* Create a new code entry, initialize and return it */
{
/* Get the opcode description */
E->Size = GetInsnSize (E->OPC, E->AM);
E->JumpTo = JumpTo;
E->LI = UseLineInfo (LI);
+ E->RI = 0;
SetUseChgInfo (E, D);
InitCollection (&E->Labels);
/* Release the line info */
ReleaseLineInfo (E->LI);
+ /* Delete the register info */
+ CE_FreeRegInfo (E);
+
/* Free the entry */
xfree (E);
}
-void ReplaceOPC (CodeEntry* E, opc_t OPC)
+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.
*/
-void AttachCodeLabel (CodeEntry* E, CodeLabel* L)
+void CE_AttachLabel (CodeEntry* E, CodeLabel* L)
/* Attach the label to the entry */
{
/* Add it to the entries label list */
-void MoveCodeLabel (CodeLabel* L, CodeEntry* 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 */
-void CodeEntrySetArg (CodeEntry* E, const char* Arg)
+void CE_SetArg (CodeEntry* E, const char* Arg)
/* Set a new argument for the given code entry. An old string is deleted. */
{
/* Free the old argument */
-void OutputCodeEntry (const CodeEntry* E, FILE* F)
+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);
+}
+
+
+
+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 char 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->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 {
+ Out->RegA = -1;
+ }
+ }
+ break;
+
+ case OP65_ASL:
+ if (E->AM == AM65_ACC && In->RegA >= 0) {
+ Out->RegA = (In->RegA << 1) & 0xFF;
+ }
+ 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;
+ }
+ break;
+
+ case OP65_DEC:
+ if (E->AM == AM65_ACC && In->RegA >= 0) {
+ Out->RegA = In->RegA - 1;
+ }
+ break;
+
+ case OP65_DEX:
+ if (In->RegX >= 0) {
+ Out->RegX = In->RegX - 1;
+ }
+ break;
+
+ case OP65_DEY:
+ if (In->RegY >= 0) {
+ Out->RegY = In->RegY - 1;
+ }
+ break;
+
+ case OP65_EOR:
+ if (In->RegA >= 0) {
+ if (CE_KnownImm (E)) {
+ Out->RegA = In->RegA ^ (short) E->Num;
+ } else {
+ Out->RegA = -1;
+ }
+ }
+ break;
+
+ case OP65_INA:
+ if (In->RegA >= 0) {
+ Out->RegA = In->RegA + 1;
+ }
+ break;
+
+ case OP65_INC:
+ if (E->AM == AM65_ACC && In->RegA >= 0) {
+ Out->RegA = In->RegA + 1;
+ }
+ break;
+
+ case OP65_INX:
+ if (In->RegX >= 0) {
+ Out->RegX = In->RegX + 1;
+ }
+ break;
+
+ case OP65_INY:
+ if (In->RegY >= 0) {
+ Out->RegY = In->RegY + 1;
+ }
+ 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;
+ }
+ break;
+
+ case OP65_JVC:
+ break;
+
+ case OP65_JVS:
+ break;
+
+ case OP65_LDA:
+ if (CE_KnownImm (E)) {
+ Out->RegA = (unsigned char) E->Num;
+ } else {
+ /* A is now unknown */
+ Out->RegA = -1;
+ }
+ break;
+
+ case OP65_LDX:
+ if (CE_KnownImm (E)) {
+ Out->RegX = (unsigned char) E->Num;
+ } else {
+ /* X is now unknown */
+ Out->RegX = -1;
+ }
+ break;
+
+ case OP65_LDY:
+ if (CE_KnownImm (E)) {
+ Out->RegY = (unsigned char) E->Num;
+ } 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;
+ }
+ break;
+
+ case OP65_NOP:
+ break;
+
+ case OP65_ORA:
+ if (In->RegA >= 0) {
+ if (CE_KnownImm (E)) {
+ Out->RegA = In->RegA | (short) E->Num;
+ } 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:
+ Out->RegA = -1;
+ break;
+
+ case OP65_ROR:
+ Out->RegA = -1;
+ 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:
+ break;
+
+ case OP65_STX:
+ break;
+
+ case OP65_STY:
+ break;
+
+ case OP65_TAX:
+ Out->RegX = In->RegA;
+ break;
+
+ case OP65_TAY:
+ Out->RegY = In->RegA;
+ break;
+
+ case OP65_TRB:
+ /* For now... */
+ Out->RegA = -1;
+ break;
+
+ case OP65_TSB:
+ /* For now... */
+ Out->RegA = -1;
+ 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;
+
+ }
+}
+
+
+
+void CE_Output (const CodeEntry* E, FILE* F)
/* Output the code entry to a file */
{
const OPCDesc* D;
unsigned LabelCount = CollCount (&E->Labels);
unsigned I;
for (I = 0; I < LabelCount; ++I) {
- OutputCodeLabel (CollConstAt (&E->Labels, I), F);
+ CL_Output (CollConstAt (&E->Labels, I), F);
}
/* Get the opcode description */
/* Print the operand */
switch (E->AM) {
+ case AM_IMP:
case AM65_IMP:
/* implicit */
break;
Chars += fprintf (F, "%*sa", 9-Chars, "");
break;
- case AM65_IMM:
+ case AM_IMM:
+ case AM65_IMM:
/* immidiate */
Chars += fprintf (F, "%*s#%s", 9-Chars, "", E->Arg);
break;
+ case AM_ABS:
case AM65_ZP:
case AM65_ABS:
/* zeropage and absolute */
+
projects / cc65 / blobdiff