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Make the AddOpLow and AddOpHigh functions usable with both, lhs and rhs

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operands.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4101 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2009-08-31 18:02:44 +00:00
parent b829bda8cb
commit 30f25ae12d
1 changed files with 27 additions and 21 deletions
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48
src/cc65/coptstop.c
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@ -503,7 +503,7 @@ static void ReplacePushByStore (StackOpData* D)
static void AddOpLow (StackOpData* D, opc_t OPC)
static void AddOpLow (StackOpData* D, opc_t OPC, LoadInfo* LI)
/* Add an op for the low byte of an operator. This function honours the
* OP_DIRECT and OP_RELOAD_Y flags and generates the necessary instructions.
* All code is inserted at the current insertion point.
@ -511,21 +511,21 @@ static void AddOpLow (StackOpData* D, opc_t OPC)
{
CodeEntry* X;
if ((D->Lhs.A.Flags & LI_DIRECT) != 0) {
if ((LI->A.Flags & LI_DIRECT) != 0) {
/* Op with a variable location. If the location is on the stack, we
* need to reload the Y register.
*/
if ((D->Lhs.A.Flags & LI_RELOAD_Y) == 0) {
if ((LI->A.Flags & LI_RELOAD_Y) == 0) {
/* opc ... */
CodeEntry* LoadA = D->Lhs.A.LoadEntry;
CodeEntry* LoadA = LI->A.LoadEntry;
X = NewCodeEntry (OPC, LoadA->AM, LoadA->Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
} else {
/* ldy #offs */
const char* Arg = MakeHexArg (D->Lhs.A.Offs);
const char* Arg = MakeHexArg (LI->A.Offs);
X = NewCodeEntry (OP65_LDY, AM65_IMM, Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
@ -536,7 +536,7 @@ static void AddOpLow (StackOpData* D, opc_t OPC)
}
/* In both cases, we can remove the load */
D->Lhs.A.Flags |= LI_REMOVE;
LI->A.Flags |= LI_REMOVE;
} else {
@ -549,7 +549,7 @@ static void AddOpLow (StackOpData* D, opc_t OPC)
static void AddOpHigh (StackOpData* D, opc_t OPC)
static void AddOpHigh (StackOpData* D, opc_t OPC, LoadInfo* LI)
/* Add an op for the high byte of an operator. Special cases (constant values
* or similar) have to be checked separately, the function covers only the
* generic case. Code is inserted at the insertion point.
@ -565,19 +565,19 @@ static void AddOpHigh (StackOpData* D, opc_t OPC)
X = NewCodeEntry (OP65_TXA, AM65_IMP, 0, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
if ((D->Lhs.X.Flags & LI_DIRECT) != 0) {
if ((LI->X.Flags & LI_DIRECT) != 0) {
if ((D->Lhs.X.Flags & LI_RELOAD_Y) == 0) {
if ((LI->X.Flags & LI_RELOAD_Y) == 0) {
/* opc xxx */
CodeEntry* LoadX = D->Lhs.X.LoadEntry;
CodeEntry* LoadX = LI->X.LoadEntry;
X = NewCodeEntry (OPC, LoadX->AM, LoadX->Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
} else {
/* ldy #const */
const char* Arg = MakeHexArg (D->Lhs.X.Offs);
const char* Arg = MakeHexArg (LI->X.Offs);
X = NewCodeEntry (OP65_LDY, AM65_IMM, Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
@ -587,7 +587,7 @@ static void AddOpHigh (StackOpData* D, opc_t OPC)
}
/* In both cases, we can remove the load */
D->Lhs.X.Flags |= LI_REMOVE;
LI->X.Flags |= LI_REMOVE;
} else {
/* opc zphi */
@ -602,7 +602,7 @@ static void AddOpHigh (StackOpData* D, opc_t OPC)
/* pla */
X = NewCodeEntry (OP65_PLA, AM65_IMP, 0, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
}
}
@ -1085,17 +1085,23 @@ static unsigned Opt_tosaddax (StackOpData* D)
InsertEntry (D, X, D->IP++);
/* Low byte */
AddOpLow (D, OP65_ADC);
AddOpLow (D, OP65_ADC, &D->Lhs);
/* High byte */
if (D->PushEntry->RI->In.RegX == 0) {
/* The high byte is the value in X plus the carry */
CodeLabel* L = CS_GenLabel (D->Code, D->NextEntry);
/* bcc L */
X = NewCodeEntry (OP65_BCC, AM65_BRA, L->Name, L, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* inx */
X = NewCodeEntry (OP65_INX, AM65_IMP, 0, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
} else if (D->OpEntry->RI->In.RegX == 0) {
/* The high byte is that of the first operand plus carry */
CodeLabel* L;
if (RegValIsKnown (D->PushEntry->RI->In.RegX)) {
@ -1118,7 +1124,7 @@ static unsigned Opt_tosaddax (StackOpData* D)
InsertEntry (D, X, D->IP++);
} else {
/* High byte is unknown */
AddOpHigh (D, OP65_ADC);
AddOpHigh (D, OP65_ADC, &D->Lhs);
}
}
@ -1141,7 +1147,7 @@ static unsigned Opt_tosandax (StackOpData* D)
/* Inline the and, low byte */
D->IP = D->OpIndex + 1;
AddOpLow (D, OP65_AND);
AddOpLow (D, OP65_AND, &D->Lhs);
/* High byte */
if (D->PushEntry->RI->In.RegX == 0 || D->OpEntry->RI->In.RegX == 0) {
@ -1150,7 +1156,7 @@ static unsigned Opt_tosandax (StackOpData* D)
InsertEntry (D, X, D->IP++);
} else {
/* High byte is unknown */
AddOpHigh (D, OP65_AND);
AddOpHigh (D, OP65_AND, &D->Lhs);
}
/* Remove the push and the call to the tosandax function */
@ -1389,7 +1395,7 @@ static unsigned Opt_tosorax (StackOpData* D)
/* Inline the or, low byte */
D->IP = D->OpIndex + 1;
AddOpLow (D, OP65_ORA);
AddOpLow (D, OP65_ORA, &D->Lhs);
/* High byte */
if (RegValIsKnown (D->PushEntry->RI->In.RegX) &&
@ -1401,7 +1407,7 @@ static unsigned Opt_tosorax (StackOpData* D)
InsertEntry (D, X, D->IP++);
} else if (D->PushEntry->RI->In.RegX != 0) {
/* High byte is unknown */
AddOpHigh (D, OP65_ORA);
AddOpHigh (D, OP65_ORA, &D->Lhs);
}
/* Remove the push and the call to the tosorax function */
@ -1600,7 +1606,7 @@ static unsigned Opt_tosxorax (StackOpData* D)
/* Inline the xor, low byte */
D->IP = D->OpIndex + 1;
AddOpLow (D, OP65_EOR);
AddOpLow (D, OP65_EOR, &D->Lhs);
/* High byte */
if (RegValIsKnown (D->PushEntry->RI->In.RegX) &&
@ -1611,7 +1617,7 @@ static unsigned Opt_tosxorax (StackOpData* D)
InsertEntry (D, X, D->IP++);
} else if (D->PushEntry->RI->In.RegX != 0) {
/* High byte is unknown */
AddOpHigh (D, OP65_EOR);
AddOpHigh (D, OP65_EOR, &D->Lhs);
}
/* Remove the push and the call to the tosandax function */