/*****************************************************************************/
/* */
-/* codeent.c */
+/* codeent.c */
/* */
-/* Code segment entry */
+/* Code segment entry */
/* */
/* */
/* */
-/* (C) 2001 Ullrich von Bassewitz */
-/* Wacholderweg 14 */
-/* D-70597 Stuttgart */
-/* EMail: uz@musoftware.de */
+/* (C) 2001-2009, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
#include <stdlib.h>
-#include <string.h>
/* common */
#include "chartype.h"
#include "check.h"
+#include "debugflag.h"
#include "xmalloc.h"
+#include "xsprintf.h"
/* cc65 */
+#include "codeent.h"
#include "codeinfo.h"
#include "error.h"
#include "global.h"
#include "codelab.h"
#include "opcodes.h"
-#include "codeent.h"
+#include "output.h"
/*****************************************************************************/
-/* Data */
+/* Data */
/*****************************************************************************/
/*****************************************************************************/
-/* Helper functions */
+/* Helper functions */
/*****************************************************************************/
/* Free a code entry argument */
{
if (Arg != EmptyArg) {
- xfree (Arg);
+ xfree (Arg);
}
}
/* Create an argument copy for assignment */
{
if (Arg && Arg[0] != '\0') {
- /* Create a copy */
- return xstrdup (Arg);
+ /* Create a copy */
+ return xstrdup (Arg);
} else {
- /* Use the empty argument string */
- return EmptyArg;
+ /* Use the empty argument string */
+ return EmptyArg;
}
}
static int NumArg (const char* Arg, unsigned long* Num)
/* If the given argument is numerical, convert it and return true. Otherwise
- * set Num to zero and return false.
- */
+** set Num to zero and return false.
+*/
{
char* End;
unsigned long Val;
/* Determine the base */
int Base = 10;
if (*Arg == '$') {
- ++Arg;
- Base = 16;
+ ++Arg;
+ Base = 16;
} else if (*Arg == '%') {
- ++Arg;
- Base = 2;
+ ++Arg;
+ Base = 2;
}
/* Convert the value. strtol is not exactly what we want here, but it's
- * cheap and may be replaced by something fancier later.
- */
+ ** cheap and may be replaced by something fancier later.
+ */
Val = strtoul (Arg, &End, Base);
/* Check if the conversion was successful */
if (*End != '\0') {
- /* Could not convert */
- *Num = 0;
- return 0;
+ /* Could not convert */
+ *Num = 0;
+ return 0;
} else {
- /* Conversion ok */
- *Num = Val;
- return 1;
+ /* Conversion ok */
+ *Num = Val;
+ return 1;
}
}
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.
- */
- if (E->OPC == OPC_JSR || ((E->Info & OF_BRA) != 0 && E->JumpTo == 0)) {
- /* A subroutine call or jump to external symbol (function exit) */
- GetFuncInfo (E->Arg, &E->Use, &E->Chg);
+ ** 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.
+ */
+ if ((E->Info & (OF_UBRA | OF_CALL)) != 0 && E->JumpTo == 0) {
+ /* A subroutine call or jump to external symbol (function exit) */
+ GetFuncInfo (E->Arg, &E->Use, &E->Chg);
} else {
- /* Some other instruction. Use the values from the opcode description
- * plus addressing mode info
- */
- E->Use = D->Use | GetAMUseInfo (E->AM);
- E->Chg = D->Chg;
+ /* Some other instruction. Use the values from the opcode description
+ ** 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;
+ }
}
}
/*****************************************************************************/
-/* Code */
+/* Code */
/*****************************************************************************/
+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)
+ CodeLabel* JumpTo, LineInfo* LI)
/* Create a new code entry, initialize and return it */
{
/* Get the opcode description */
/* Initialize the fields */
E->OPC = D->OPC;
E->AM = AM;
- E->Arg = GetArgCopy (Arg);
- E->Flags = NumArg (E->Arg, &E->Num)? CEF_NUMARG : 0;
E->Size = GetInsnSize (E->OPC, E->AM);
+ E->Arg = GetArgCopy (Arg);
+ E->Flags = NumArg (E->Arg, &E->Num)? CEF_NUMARG : 0; /* Needs E->Arg */
E->Info = D->Info;
E->JumpTo = JumpTo;
E->LI = UseLineInfo (LI);
+ E->RI = 0;
SetUseChgInfo (E, D);
InitCollection (&E->Labels);
/* If we have a label given, add this entry to the label */
if (JumpTo) {
- CollAppend (&JumpTo->JumpFrom, E);
+ CollAppend (&JumpTo->JumpFrom, E);
}
/* Return the initialized struct */
/* 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.
- */
+** 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->Size = GetInsnSize (E->OPC, E->AM);
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;
+ return (E1->OPC == E2->OPC && E1->AM == E2->AM && strcmp (E1->Arg, E2->Arg) == 0);
}
-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_ClearJumpTo (CodeEntry* E)
+/* Clear the JumpTo entry and the argument (which contained the name of the
+** label). Note: The function will not clear the backpointer from the label,
+** so use it with care.
+*/
+{
+ /* Clear the JumpTo entry */
+ E->JumpTo = 0;
+
+ /* Clear the argument and assign the empty one */
+ FreeArg (E->Arg);
+ E->Arg = EmptyArg;
+}
+
+
+
+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)
-/* Set a new argument for the given code entry. An old string is deleted. */
+void CE_SetArg (CodeEntry* E, const char* Arg)
+/* Replace the argument by the new one. */
{
/* Free the old argument */
FreeArg (E->Arg);
-void OutputCodeEntry (const CodeEntry* E, FILE* F)
-/* Output the code entry to a file */
+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");
+ }
+
+ /* Replace the argument by the new one */
+ CE_SetArg (E, Buf);
+
+ /* Use the new numerical value */
+ E->Num = Num;
+}
+
+
+
+int CE_IsConstImm (const CodeEntry* E)
+/* Return true if the argument of E is a constant immediate value */
+{
+ return (E->AM == AM65_IMM && CE_HasNumArg (E));
+}
+
+
+
+int CE_IsKnownImm (const CodeEntry* E, unsigned long Num)
+/* Return true if the argument of E is a constant immediate value that is
+** equal to Num.
+*/
+{
+ return (E->AM == AM65_IMM && CE_HasNumArg (E) && E->Num == Num);
+}
+
+
+
+int CE_UseLoadFlags (CodeEntry* E)
+/* Return true if the instruction uses any flags that are set by a load of
+** a register (N and Z).
+*/
+{
+ /* Follow unconditional branches, but beware of endless loops. After this,
+ ** E will point to the first entry that is not a branch.
+ */
+ if (E->Info & OF_UBRA) {
+ Collection C = AUTO_COLLECTION_INITIALIZER;
+
+ /* Follow the chain */
+ while (E->Info & OF_UBRA) {
+
+ /* Remember the entry so we can detect loops */
+ CollAppend (&C, E);
+
+ /* Check the target */
+ if (E->JumpTo == 0 || CollIndex (&C, E->JumpTo->Owner) >= 0) {
+ /* Unconditional jump to external symbol, or endless loop. */
+ DoneCollection (&C);
+ return 0; /* Flags not used */
+ }
+
+ /* Follow the chain */
+ E = E->JumpTo->Owner;
+ }
+
+ /* Delete the collection */
+ DoneCollection (&C);
+ }
+
+ /* 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:
+ /* 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 = UNKNOWN_REGVAL;
+ break;
+
+ case OP65_AND:
+ if (RegValIsKnown (In->RegA)) {
+ if (CE_IsConstImm (E)) {
+ Out->RegA = In->RegA & (short) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->RegA = In->RegA & In->Tmp1;
+ break;
+ case REG_PTR1_LO:
+ Out->RegA = In->RegA & In->Ptr1Lo;
+ break;
+ case REG_PTR1_HI:
+ Out->RegA = In->RegA & In->Ptr1Hi;
+ 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 = UNKNOWN_REGVAL;
+ break;
+ }
+ } else {
+ Out->RegA = UNKNOWN_REGVAL;
+ }
+ } else if (CE_IsKnownImm (E, 0)) {
+ /* A and $00 does always give zero */
+ Out->RegA = 0;
+ }
+ break;
+
+ case OP65_ASL:
+ if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA << 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 << 1) & 0xFF;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = (In->Ptr1Lo << 1) & 0xFF;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = (In->Ptr1Hi << 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 (RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA - 1) & 0xFF;
+ }
+ break;
+
+ case OP65_DEC:
+ if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA - 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 - 1) & 0xFF;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = (In->Ptr1Lo - 1) & 0xFF;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = (In->Ptr1Hi - 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 (RegValIsKnown (In->RegX)) {
+ Out->RegX = (In->RegX - 1) & 0xFF;
+ }
+ break;
+
+ case OP65_DEY:
+ if (RegValIsKnown (In->RegY)) {
+ Out->RegY = (In->RegY - 1) & 0xFF;
+ }
+ break;
+
+ case OP65_EOR:
+ if (RegValIsKnown (In->RegA)) {
+ if (CE_IsConstImm (E)) {
+ Out->RegA = In->RegA ^ (short) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->RegA = In->RegA ^ In->Tmp1;
+ break;
+ case REG_PTR1_LO:
+ Out->RegA = In->RegA ^ In->Ptr1Lo;
+ break;
+ case REG_PTR1_HI:
+ Out->RegA = In->RegA ^ In->Ptr1Hi;
+ 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 = UNKNOWN_REGVAL;
+ break;
+ }
+ } else {
+ Out->RegA = UNKNOWN_REGVAL;
+ }
+ }
+ break;
+
+ case OP65_INA:
+ if (RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA + 1) & 0xFF;
+ }
+ break;
+
+ case OP65_INC:
+ if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA + 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 + 1) & 0xFF;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = (In->Ptr1Lo + 1) & 0xFF;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = (In->Ptr1Hi + 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 (RegValIsKnown (In->RegX)) {
+ Out->RegX = (In->RegX + 1) & 0xFF;
+ }
+ break;
+
+ case OP65_INY:
+ if (RegValIsKnown (In->RegY)) {
+ 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 = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_X) {
+ Out->RegX = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_Y) {
+ Out->RegY = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_TMP1) {
+ Out->Tmp1 = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_PTR1_LO) {
+ Out->Ptr1Lo = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_PTR1_HI) {
+ Out->Ptr1Hi = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_SREG_LO) {
+ Out->SRegLo = UNKNOWN_REGVAL;
+ }
+ if (Chg & REG_SREG_HI) {
+ Out->SRegHi = UNKNOWN_REGVAL;
+ }
+ /* ## FIXME: Quick hack for some known functions: */
+ if (strcmp (E->Arg, "complax") == 0) {
+ if (RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA ^ 0xFF);
+ }
+ if (RegValIsKnown (In->RegX)) {
+ Out->RegX = (In->RegX ^ 0xFF);
+ }
+ } else 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, "tosaslax") == 0) {
+ if (RegValIsKnown (In->RegA) && (In->RegA & 0x0F) >= 8) {
+ printf ("Hey!\n");
+ Out->RegA = 0;
+ }
+ } else if (strcmp (E->Arg, "tosorax") == 0) {
+ if (In->RegA == 0xFF) {
+ Out->RegA = 0xFF;
+ }
+ if (In->RegX == 0xFF) {
+ Out->RegX = 0xFF;
+ }
+ } else if (strcmp (E->Arg, "tosshlax") == 0) {
+ if ((In->RegA & 0x0F) >= 8) {
+ Out->RegA = 0;
+ }
+ } else if (FindBoolCmpCond (E->Arg) != CMP_INV ||
+ FindTosCmpCond (E->Arg) != CMP_INV) {
+ /* Result is boolean value, so X is zero on output */
+ Out->RegX = 0;
+ }
+ break;
+
+ case OP65_JVC:
+ break;
+
+ case OP65_JVS:
+ break;
+
+ case OP65_LDA:
+ if (CE_IsConstImm (E)) {
+ Out->RegA = (unsigned char) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->RegA = In->Tmp1;
+ break;
+ case REG_PTR1_LO:
+ Out->RegA = In->Ptr1Lo;
+ break;
+ case REG_PTR1_HI:
+ Out->RegA = In->Ptr1Hi;
+ break;
+ case REG_SREG_LO:
+ Out->RegA = In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegA = In->SRegHi;
+ break;
+ default:
+ Out->RegA = UNKNOWN_REGVAL;
+ break;
+ }
+ } else {
+ /* A is now unknown */
+ Out->RegA = UNKNOWN_REGVAL;
+ }
+ break;
+
+ case OP65_LDX:
+ if (CE_IsConstImm (E)) {
+ Out->RegX = (unsigned char) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->RegX = In->Tmp1;
+ break;
+ case REG_PTR1_LO:
+ Out->RegX = In->Ptr1Lo;
+ break;
+ case REG_PTR1_HI:
+ Out->RegX = In->Ptr1Hi;
+ break;
+ case REG_SREG_LO:
+ Out->RegX = In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegX = In->SRegHi;
+ break;
+ default:
+ Out->RegX = UNKNOWN_REGVAL;
+ break;
+ }
+ } else {
+ /* X is now unknown */
+ Out->RegX = UNKNOWN_REGVAL;
+ }
+ break;
+
+ case OP65_LDY:
+ if (CE_IsConstImm (E)) {
+ Out->RegY = (unsigned char) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->RegY = In->Tmp1;
+ break;
+ case REG_PTR1_LO:
+ Out->RegY = In->Ptr1Lo;
+ break;
+ case REG_PTR1_HI:
+ Out->RegY = In->Ptr1Hi;
+ break;
+ case REG_SREG_LO:
+ Out->RegY = In->SRegLo;
+ break;
+ case REG_SREG_HI:
+ Out->RegY = In->SRegHi;
+ break;
+ default:
+ Out->RegY = UNKNOWN_REGVAL;
+ break;
+ }
+ } else {
+ /* Y is now unknown */
+ Out->RegY = UNKNOWN_REGVAL;
+ }
+ break;
+
+ case OP65_LSR:
+ if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+ Out->RegA = (In->RegA >> 1) & 0xFF;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = (In->Tmp1 >> 1) & 0xFF;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = (In->Ptr1Lo >> 1) & 0xFF;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = (In->Ptr1Hi >> 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 (RegValIsKnown (In->RegA)) {
+ if (CE_IsConstImm (E)) {
+ Out->RegA = In->RegA | (short) E->Num;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Use & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->RegA = In->RegA | In->Tmp1;
+ break;
+ case REG_PTR1_LO:
+ Out->RegA = In->RegA | In->Ptr1Lo;
+ break;
+ case REG_PTR1_HI:
+ Out->RegA = In->RegA | In->Ptr1Hi;
+ 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 = UNKNOWN_REGVAL;
+ break;
+ }
+ } else {
+ /* A is now unknown */
+ Out->RegA = UNKNOWN_REGVAL;
+ }
+ } else if (CE_IsKnownImm (E, 0xFF)) {
+ /* ORA with 0xFF does always give 0xFF */
+ Out->RegA = 0xFF;
+ }
+ break;
+
+ case OP65_PHA:
+ break;
+
+ case OP65_PHP:
+ break;
+
+ case OP65_PHX:
+ break;
+
+ case OP65_PHY:
+ break;
+
+ case OP65_PLA:
+ Out->RegA = UNKNOWN_REGVAL;
+ break;
+
+ case OP65_PLP:
+ break;
+
+ case OP65_PLX:
+ Out->RegX = UNKNOWN_REGVAL;
+ break;
+
+ case OP65_PLY:
+ Out->RegY = UNKNOWN_REGVAL;
+ break;
+
+ case OP65_ROL:
+ /* We don't know the value of the carry bit */
+ if (E->AM == AM65_ACC) {
+ Out->RegA = UNKNOWN_REGVAL;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = UNKNOWN_REGVAL;
+ 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 = UNKNOWN_REGVAL;
+ } else if (E->AM == AM65_ZP) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = UNKNOWN_REGVAL;
+ 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 = UNKNOWN_REGVAL;
+ 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 & REG_ZP, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = In->RegA;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = In->RegA;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = 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 & REG_ZP, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = In->RegX;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = In->RegX;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = 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 & REG_ZP, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = In->RegY;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = In->RegY;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = 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 & REG_ZP, 0)) {
+ case REG_TMP1:
+ Out->Tmp1 = 0;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = 0;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = 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 (RegValIsKnown (In->RegA)) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 &= ~In->RegA;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo &= ~In->RegA;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi &= ~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 & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = UNKNOWN_REGVAL;
+ break;
+ }
+ }
+ }
+ break;
+
+ case OP65_TSB:
+ if (E->AM == AM65_ZPX) {
+ /* Invalidates all ZP registers */
+ RC_InvalidateZP (Out);
+ } else if (E->AM == AM65_ZP) {
+ if (RegValIsKnown (In->RegA)) {
+ switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 |= In->RegA;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo |= In->RegA;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi |= 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 & REG_ZP, In)) {
+ case REG_TMP1:
+ Out->Tmp1 = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_LO:
+ Out->Ptr1Lo = UNKNOWN_REGVAL;
+ break;
+ case REG_PTR1_HI:
+ Out->Ptr1Hi = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_LO:
+ Out->SRegLo = UNKNOWN_REGVAL;
+ break;
+ case REG_SREG_HI:
+ Out->SRegHi = UNKNOWN_REGVAL;
+ break;
+ }
+ }
+ }
+ break;
+
+ case OP65_TSX:
+ Out->RegX = UNKNOWN_REGVAL;
+ 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" : "_");
+ strcat (Buf, U & REG_SP? "S" : "_");
+
+ return Buf;
+}
+
+
+
+static char* RegContentDesc (const RegContents* RC, char* Buf)
+/* Return a string containing register contents */
+{
+ char* B = Buf;
+
+ if (RegValIsUnknown (RC->RegA)) {
+ strcpy (B, "A:XX ");
+ } else {
+ sprintf (B, "A:%02X ", RC->RegA);
+ }
+ B += 5;
+ if (RegValIsUnknown (RC->RegX)) {
+ strcpy (B, "X:XX ");
+ } else {
+ sprintf (B, "X:%02X ", RC->RegX);
+ }
+ B += 5;
+ if (RegValIsUnknown (RC->RegY)) {
+ strcpy (B, "Y:XX");
+ } else {
+ sprintf (B, "Y:%02X", RC->RegY);
+ }
+ B += 4;
+
+ return Buf;
+}
+
+
+
+void CE_Output (const CodeEntry* E)
+/* Output the code entry to the output file */
{
const OPCDesc* D;
unsigned Chars;
+ int Space;
const char* Target;
/* If we have a label, print that */
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));
}
/* Get the opcode description */
D = GetOPCDesc (E->OPC);
/* Print the mnemonic */
- Chars = fprintf (F, "\t%s", D->Mnemo);
+ Chars = WriteOutput ("\t%s", D->Mnemo);
+
+ /* Space to leave before the operand */
+ Space = 9 - Chars;
/* Print the operand */
switch (E->AM) {
- case AM_IMP:
- /* implicit */
- break;
-
- case AM_ACC:
- /* accumulator */
- Chars += fprintf (F, "%*sa", 9-Chars, "");
- break;
-
- case AM_IMM:
- /* immidiate */
- Chars += fprintf (F, "%*s#%s", 9-Chars, "", E->Arg);
- break;
-
- case AM_ZP:
- case AM_ABS:
- /* zeropage and absolute */
- Chars += fprintf (F, "%*s%s", 9-Chars, "", E->Arg);
- break;
-
- case AM_ZPX:
- case AM_ABSX:
- /* zeropage,X and absolute,X */
- Chars += fprintf (F, "%*s%s,x", 9-Chars, "", E->Arg);
- break;
-
- case AM_ABSY:
- /* absolute,Y */
- Chars += fprintf (F, "%*s%s,y", 9-Chars, "", E->Arg);
- break;
-
- case AM_ZPX_IND:
- /* (zeropage,x) */
- Chars += fprintf (F, "%*s(%s,x)", 9-Chars, "", E->Arg);
- break;
-
- case AM_ZP_INDY:
- /* (zeropage),y */
- Chars += fprintf (F, "%*s(%s),y", 9-Chars, "", E->Arg);
- break;
-
- case AM_ZP_IND:
- /* (zeropage) */
- Chars += fprintf (F, "%*s(%s)", 9-Chars, "", E->Arg);
- break;
-
- case AM_BRA:
- /* branch */
- Target = E->JumpTo? E->JumpTo->Name : E->Arg;
- Chars += fprintf (F, "%*s%s", 9-Chars, "", Target);
- break;
-
- default:
- Internal ("Invalid addressing mode");
+ case AM65_IMP:
+ /* implicit */
+ break;
+
+ case AM65_ACC:
+ /* accumulator */
+ Chars += WriteOutput ("%*sa", Space, "");
+ break;
+
+ case AM65_IMM:
+ /* immidiate */
+ Chars += WriteOutput ("%*s#%s", Space, "", E->Arg);
+ break;
+
+ case AM65_ZP:
+ case AM65_ABS:
+ /* zeropage and absolute */
+ Chars += WriteOutput ("%*s%s", Space, "", E->Arg);
+ break;
+
+ case AM65_ZPX:
+ case AM65_ABSX:
+ /* zeropage,X and absolute,X */
+ Chars += WriteOutput ("%*s%s,x", Space, "", E->Arg);
+ break;
+
+ case AM65_ABSY:
+ /* absolute,Y */
+ Chars += WriteOutput ("%*s%s,y", Space, "", E->Arg);
+ break;
+
+ case AM65_ZPX_IND:
+ /* (zeropage,x) */
+ Chars += WriteOutput ("%*s(%s,x)", Space, "", E->Arg);
+ break;
+
+ case AM65_ZP_INDY:
+ /* (zeropage),y */
+ Chars += WriteOutput ("%*s(%s),y", Space, "", E->Arg);
+ break;
+
+ case AM65_ZP_IND:
+ /* (zeropage) */
+ Chars += WriteOutput ("%*s(%s)", Space, "", E->Arg);
+ break;
+
+ case AM65_BRA:
+ /* branch */
+ Target = E->JumpTo? E->JumpTo->Name : E->Arg;
+ Chars += WriteOutput ("%*s%s", Space, "", Target);
+ break;
+
+ default:
+ Internal ("Invalid addressing mode");
}
/* 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);
- } else {
- /* Terminate the line */
- fprintf (F, "\n");
+ char Use [128];
+ char Chg [128];
+ WriteOutput ("%*s; USE: %-12s CHG: %-12s SIZE: %u",
+ (int)(30-Chars), "",
+ RegInfoDesc (E->Use, Use),
+ RegInfoDesc (E->Chg, Chg),
+ E->Size);
+
+ if (E->RI) {
+ char RegIn[32];
+ char RegOut[32];
+ WriteOutput (" In %s Out %s",
+ RegContentDesc (&E->RI->In, RegIn),
+ RegContentDesc (&E->RI->Out, RegOut));
+ }
}
-}
-
-
-
-
+ /* Terminate the line */
+ WriteOutput ("\n");
+}
projects / cc65 / blobdiff