mirror of
https://github.com/cc65/cc65.git
synced 2024-08-31 07:29:23 +00:00
More optimizations
git-svn-id: svn://svn.cc65.org/cc65/trunk@1613 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
parent
756091e31f
commit
b948d96206
@ -615,85 +615,6 @@ static unsigned OptPtrStore2 (CodeSeg* S)
|
|||||||
|
|
||||||
|
|
||||||
static unsigned OptPtrLoad1 (CodeSeg* S)
|
static unsigned OptPtrLoad1 (CodeSeg* S)
|
||||||
/* Search for the sequence:
|
|
||||||
*
|
|
||||||
* tax
|
|
||||||
* dey
|
|
||||||
* lda (sp),y # May be any destination
|
|
||||||
* ldy ...
|
|
||||||
* jsr ldauidx
|
|
||||||
*
|
|
||||||
* and replace it by:
|
|
||||||
*
|
|
||||||
* sta ptr1+1
|
|
||||||
* dey
|
|
||||||
* lda (sp),y
|
|
||||||
* sta ptr1
|
|
||||||
* ldy ...
|
|
||||||
* ldx #$00
|
|
||||||
* lda (ptr1),y
|
|
||||||
*/
|
|
||||||
{
|
|
||||||
unsigned Changes = 0;
|
|
||||||
|
|
||||||
/* Walk over the entries */
|
|
||||||
unsigned I = 0;
|
|
||||||
while (I < CS_GetEntryCount (S)) {
|
|
||||||
|
|
||||||
CodeEntry* L[5];
|
|
||||||
|
|
||||||
/* Get next entry */
|
|
||||||
L[0] = CS_GetEntry (S, I);
|
|
||||||
|
|
||||||
/* Check for the sequence */
|
|
||||||
if (L[0]->OPC == OP65_TAX &&
|
|
||||||
CS_GetEntries (S, L+1, I+1, 4) &&
|
|
||||||
L[1]->OPC == OP65_DEY &&
|
|
||||||
!CE_HasLabel (L[1]) &&
|
|
||||||
L[2]->OPC == OP65_LDA &&
|
|
||||||
!CE_HasLabel (L[2]) &&
|
|
||||||
L[3]->OPC == OP65_LDY &&
|
|
||||||
!CE_HasLabel (L[3]) &&
|
|
||||||
CE_IsCallTo (L[4], "ldauidx") &&
|
|
||||||
!CE_HasLabel (L[4])) {
|
|
||||||
|
|
||||||
CodeEntry* X;
|
|
||||||
|
|
||||||
/* Store the high byte and remove the TAX instead */
|
|
||||||
X = NewCodeEntry (OP65_STA, AM65_ZP, "ptr1+1", 0, L[0]->LI);
|
|
||||||
CS_InsertEntry (S, X, I+1);
|
|
||||||
CS_DelEntry (S, I);
|
|
||||||
|
|
||||||
/* Store the low byte */
|
|
||||||
X = NewCodeEntry (OP65_STA, AM65_ZP, "ptr1", 0, L[2]->LI);
|
|
||||||
CS_InsertEntry (S, X, I+3);
|
|
||||||
|
|
||||||
/* Delete the call to ldauidx */
|
|
||||||
CS_DelEntry (S, I+5);
|
|
||||||
|
|
||||||
/* Load high and low byte */
|
|
||||||
X = NewCodeEntry (OP65_LDX, AM65_IMM, "$00", 0, L[3]->LI);
|
|
||||||
CS_InsertEntry (S, X, I+5);
|
|
||||||
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "ptr1", 0, L[3]->LI);
|
|
||||||
CS_InsertEntry (S, X, I+6);
|
|
||||||
|
|
||||||
/* Remember, we had changes */
|
|
||||||
++Changes;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Next entry */
|
|
||||||
++I;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Return the number of changes made */
|
|
||||||
return Changes;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
static unsigned OptPtrLoad2 (CodeSeg* S)
|
|
||||||
/* Search for the sequence:
|
/* Search for the sequence:
|
||||||
*
|
*
|
||||||
* clc
|
* clc
|
||||||
@ -803,7 +724,7 @@ static unsigned OptPtrLoad2 (CodeSeg* S)
|
|||||||
|
|
||||||
|
|
||||||
|
|
||||||
static unsigned OptPtrLoad3 (CodeSeg* S)
|
static unsigned OptPtrLoad2 (CodeSeg* S)
|
||||||
/* Search for the sequence:
|
/* Search for the sequence:
|
||||||
*
|
*
|
||||||
* adc xxx
|
* adc xxx
|
||||||
@ -900,7 +821,7 @@ static unsigned OptPtrLoad3 (CodeSeg* S)
|
|||||||
|
|
||||||
|
|
||||||
|
|
||||||
static unsigned OptPtrLoad4 (CodeSeg* S)
|
static unsigned OptPtrLoad3 (CodeSeg* S)
|
||||||
/* Search for the sequence:
|
/* Search for the sequence:
|
||||||
*
|
*
|
||||||
* lda #<(label+0)
|
* lda #<(label+0)
|
||||||
@ -999,7 +920,7 @@ static unsigned OptPtrLoad4 (CodeSeg* S)
|
|||||||
|
|
||||||
|
|
||||||
|
|
||||||
static unsigned OptPtrLoad5 (CodeSeg* S)
|
static unsigned OptPtrLoad4 (CodeSeg* S)
|
||||||
/* Search for the sequence:
|
/* Search for the sequence:
|
||||||
*
|
*
|
||||||
* lda #<(label+0)
|
* lda #<(label+0)
|
||||||
@ -1109,6 +1030,74 @@ static unsigned OptPtrLoad5 (CodeSeg* S)
|
|||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
static unsigned OptPtrLoad5 (CodeSeg* S)
|
||||||
|
/* Search for the sequence:
|
||||||
|
*
|
||||||
|
* lda zp
|
||||||
|
* ldx zp+1
|
||||||
|
* ldy xx
|
||||||
|
* jsr ldauidx
|
||||||
|
*
|
||||||
|
* and replace it by:
|
||||||
|
*
|
||||||
|
* ldy xx
|
||||||
|
* ldx #$00
|
||||||
|
* lda (zp),y
|
||||||
|
*/
|
||||||
|
{
|
||||||
|
unsigned Changes = 0;
|
||||||
|
|
||||||
|
/* Walk over the entries */
|
||||||
|
unsigned I = 0;
|
||||||
|
while (I < CS_GetEntryCount (S)) {
|
||||||
|
|
||||||
|
CodeEntry* L[4];
|
||||||
|
unsigned Len;
|
||||||
|
|
||||||
|
/* Get next entry */
|
||||||
|
L[0] = CS_GetEntry (S, I);
|
||||||
|
|
||||||
|
/* Check for the sequence */
|
||||||
|
if (L[0]->OPC == OP65_LDA && L[0]->AM == AM65_ZP &&
|
||||||
|
CS_GetEntries (S, L+1, I+1, 3) &&
|
||||||
|
!CS_RangeHasLabel (S, I+1, 3) &&
|
||||||
|
L[1]->OPC == OP65_LDX && L[1]->AM == AM65_ZP &&
|
||||||
|
(Len = strlen (L[0]->Arg)) > 0 &&
|
||||||
|
strncmp (L[0]->Arg, L[1]->Arg, Len) == 0 &&
|
||||||
|
strcmp (L[1]->Arg + Len, "+1") == 0 &&
|
||||||
|
L[2]->OPC == OP65_LDY &&
|
||||||
|
CE_IsCallTo (L[3], "ldauidx")) {
|
||||||
|
|
||||||
|
CodeEntry* X;
|
||||||
|
|
||||||
|
/* ldx #$00 */
|
||||||
|
X = NewCodeEntry (OP65_LDX, AM65_IMM, "$00", 0, L[3]->LI);
|
||||||
|
CS_InsertEntry (S, X, I+3);
|
||||||
|
|
||||||
|
/* lda (zp),y */
|
||||||
|
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, L[0]->Arg, 0, L[3]->LI);
|
||||||
|
CS_InsertEntry (S, X, I+4);
|
||||||
|
|
||||||
|
/* Remove the old code */
|
||||||
|
CS_DelEntry (S, I+5);
|
||||||
|
CS_DelEntries (S, I, 2);
|
||||||
|
|
||||||
|
/* Remember, we had changes */
|
||||||
|
++Changes;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Next entry */
|
||||||
|
++I;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Return the number of changes made */
|
||||||
|
return Changes;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
static unsigned OptPtrLoad6 (CodeSeg* S)
|
static unsigned OptPtrLoad6 (CodeSeg* S)
|
||||||
/* Search for the sequence
|
/* Search for the sequence
|
||||||
*
|
*
|
||||||
@ -1433,7 +1422,7 @@ static OptFunc DOptPtrLoad1 = { OptPtrLoad1, "OptPtrLoad1", 100, 0,
|
|||||||
static OptFunc DOptPtrLoad2 = { OptPtrLoad2, "OptPtrLoad2", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrLoad2 = { OptPtrLoad2, "OptPtrLoad2", 100, 0, 0, 0, 0, 0 };
|
||||||
static OptFunc DOptPtrLoad3 = { OptPtrLoad3, "OptPtrLoad3", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrLoad3 = { OptPtrLoad3, "OptPtrLoad3", 100, 0, 0, 0, 0, 0 };
|
||||||
static OptFunc DOptPtrLoad4 = { OptPtrLoad4, "OptPtrLoad4", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrLoad4 = { OptPtrLoad4, "OptPtrLoad4", 100, 0, 0, 0, 0, 0 };
|
||||||
static OptFunc DOptPtrLoad5 = { OptPtrLoad5, "OptPtrLoad5", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrLoad5 = { OptPtrLoad5, "OptPtrLoad5", 65, 0, 0, 0, 0, 0 };
|
||||||
static OptFunc DOptPtrLoad6 = { OptPtrLoad6, "OptPtrLoad6", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrLoad6 = { OptPtrLoad6, "OptPtrLoad6", 100, 0, 0, 0, 0, 0 };
|
||||||
static OptFunc DOptPtrStore1 = { OptPtrStore1, "OptPtrStore1", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrStore1 = { OptPtrStore1, "OptPtrStore1", 100, 0, 0, 0, 0, 0 };
|
||||||
static OptFunc DOptPtrStore2 = { OptPtrStore2, "OptPtrStore2", 100, 0, 0, 0, 0, 0 };
|
static OptFunc DOptPtrStore2 = { OptPtrStore2, "OptPtrStore2", 100, 0, 0, 0, 0, 0 };
|
||||||
|
Loading…
Reference in New Issue
Block a user