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Moved "store through pointers" optimizations into its own file and added

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another one.


git-svn-id: svn://svn.cc65.org/cc65/trunk@5707 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2012-06-10 20:09:40 +00:00
parent 4b80a3b9cd
commit cf509a775d
3 changed files with 796 additions and 423 deletions
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497
src/cc65/codeopt.c
View File

@ -55,6 +55,7 @@
#include "coptind.h"
#include "coptneg.h"
#include "coptptrload.h"
#include "coptptrstore.h"
#include "coptpush.h"
#include "coptsize.h"
#include "coptstop.h"
@ -602,38 +603,84 @@ static unsigned OptLoad2 (CodeSeg* S)
unsigned I;
unsigned Changes = 0;
/* Generate register info */
CS_GenRegInfo (S);
/* Walk over the entries */
I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* E;
CodeEntry* L[3];
/* Get next entry */
E = CS_GetEntry (S, I);
L[0] = CS_GetEntry (S, I);
/* Check for the sequence */
if (CE_IsCallTo (E, "ldaxysp")) {
if (CE_IsCallTo (L[0], "ldaxysp")) {
CodeEntry* X;
/* lda (sp),y */
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "sp", 0, E->LI);
CS_InsertEntry (S, X, I+1);
/* Followed by sta abs/stx abs? */
if (CS_GetEntries (S, L+1, I+1, 2) &&
L[1]->OPC == OP65_STA &&
L[2]->OPC == OP65_STX &&
(L[1]->Arg == 0 ||
L[2]->Arg == 0 ||
strcmp (L[1]->Arg, L[2]->Arg) != 0) &&
!CS_RangeHasLabel (S, I+1, 2) &&
!RegXUsed (S, I+3)) {
/* tax */
X = NewCodeEntry (OP65_TAX, AM65_IMP, 0, 0, E->LI);
CS_InsertEntry (S, X, I+2);
/* A/X are stored into memory somewhere and X is not used
* later
*/
/* dey */
X = NewCodeEntry (OP65_DEY, AM65_IMP, 0, 0, E->LI);
CS_InsertEntry (S, X, I+3);
/* lda (sp),y */
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "sp", 0, L[0]->LI);
CS_InsertEntry (S, X, I+3);
/* lda (sp),y */
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "sp", 0, E->LI);
CS_InsertEntry (S, X, I+4);
/* sta abs */
X = NewCodeEntry (OP65_STA, L[2]->AM, L[2]->Arg, 0, L[2]->LI);
CS_InsertEntry (S, X, I+4);
/* Now remove the call to the subroutine */
CS_DelEntry (S, I);
/* dey */
X = NewCodeEntry (OP65_DEY, AM65_IMP, 0, 0, L[0]->LI);
CS_InsertEntry (S, X, I+5);
/* lda (sp),y */
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "sp", 0, L[0]->LI);
CS_InsertEntry (S, X, I+6);
/* sta abs */
X = NewCodeEntry (OP65_STA, L[1]->AM, L[1]->Arg, 0, L[1]->LI);
CS_InsertEntry (S, X, I+7);
/* Now remove the call to the subroutine and the sta/stx */
CS_DelEntries (S, I, 3);
} else {
/* Standard replacement */
/* lda (sp),y */
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "sp", 0, L[0]->LI);
CS_InsertEntry (S, X, I+1);
/* tax */
X = NewCodeEntry (OP65_TAX, AM65_IMP, 0, 0, L[0]->LI);
CS_InsertEntry (S, X, I+2);
/* dey */
X = NewCodeEntry (OP65_DEY, AM65_IMP, 0, 0, L[0]->LI);
CS_InsertEntry (S, X, I+3);
/* lda (sp),y */
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, "sp", 0, L[0]->LI);
CS_InsertEntry (S, X, I+4);
/* Now remove the call to the subroutine */
CS_DelEntry (S, I);
}
/* Remember, we had changes */
++Changes;
@ -644,410 +691,8 @@ static unsigned OptLoad2 (CodeSeg* S)
++I;
}
/* Return the number of changes made */
return Changes;
}
/*****************************************************************************/
/* Optimize stores through pointers */
/*****************************************************************************/
static unsigned OptPtrStore1Sub (CodeSeg* S, unsigned I, CodeEntry** const L)
/* Check if this is one of the allowed suboperation for OptPtrStore1 */
{
/* Check for a label attached to the entry */
if (CE_HasLabel (L[0])) {
return 0;
}
/* Check for single insn sub ops */
if (L[0]->OPC == OP65_AND ||
L[0]->OPC == OP65_EOR ||
L[0]->OPC == OP65_ORA ||
(L[0]->OPC == OP65_JSR && strncmp (L[0]->Arg, "shlax", 5) == 0) ||
(L[0]->OPC == OP65_JSR && strncmp (L[0]->Arg, "shrax", 5) == 0)) {
/* One insn */
return 1;
} else if (L[0]->OPC == OP65_CLC &&
(L[1] = CS_GetNextEntry (S, I)) != 0 &&
L[1]->OPC == OP65_ADC &&
!CE_HasLabel (L[1])) {
return 2;
} else if (L[0]->OPC == OP65_SEC &&
(L[1] = CS_GetNextEntry (S, I)) != 0 &&
L[1]->OPC == OP65_SBC &&
!CE_HasLabel (L[1])) {
return 2;
}
/* Not found */
return 0;
}
static unsigned OptPtrStore1 (CodeSeg* S)
/* Search for the sequence:
*
* jsr pushax
* ldy xxx
* jsr ldauidx
* subop
* ldy yyy
* jsr staspidx
*
* and replace it by:
*
* sta ptr1
* stx ptr1+1
* ldy xxx
* ldx #$00
* lda (ptr1),y
* subop
* ldy yyy
* sta (ptr1),y
*
* In case a/x is loaded from the register bank before the pushax, we can even
* use the register bank instead of ptr1.
*/
/*
* jsr pushax
* ldy xxx
* jsr ldauidx
* ldx #$00
* lda (zp),y
* subop
* ldy yyy
* sta (zp),y
* jsr staspidx
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
unsigned K;
CodeEntry* L[10];
/* Get next entry */
L[0] = CS_GetEntry (S, I);
/* Check for the sequence */
if (CE_IsCallTo (L[0], "pushax") &&
CS_GetEntries (S, L+1, I+1, 3) &&
L[1]->OPC == OP65_LDY &&
CE_IsConstImm (L[1]) &&
!CE_HasLabel (L[1]) &&
CE_IsCallTo (L[2], "ldauidx") &&
!CE_HasLabel (L[2]) &&
(K = OptPtrStore1Sub (S, I+3, L+3)) > 0 &&
CS_GetEntries (S, L+3+K, I+3+K, 2) &&
L[3+K]->OPC == OP65_LDY &&
CE_IsConstImm (L[3+K]) &&
!CE_HasLabel (L[3+K]) &&
CE_IsCallTo (L[4+K], "staspidx") &&
!CE_HasLabel (L[4+K])) {
const char* RegBank = 0;
const char* ZPLoc = "ptr1";
CodeEntry* X;
/* Get the preceeding two instructions and check them. We check
* for:
* lda regbank+n
* ldx regbank+n+1
*/
if (I > 1) {
CodeEntry* P[2];
P[0] = CS_GetEntry (S, I-2);
P[1] = CS_GetEntry (S, I-1);
if (P[0]->OPC == OP65_LDA &&
P[0]->AM == AM65_ZP &&
P[1]->OPC == OP65_LDX &&
P[1]->AM == AM65_ZP &&
!CE_HasLabel (P[1]) &&
strncmp (P[0]->Arg, "regbank+", 8) == 0) {
unsigned Len = strlen (P[0]->Arg);
if (strncmp (P[0]->Arg, P[1]->Arg, Len) == 0 &&
P[1]->Arg[Len+0] == '+' &&
P[1]->Arg[Len+1] == '1' &&
P[1]->Arg[Len+2] == '\0') {
/* Ok, found. Use the name of the register bank */
RegBank = ZPLoc = P[0]->Arg;
}
}
}
/* Insert the load via the zp pointer */
X = NewCodeEntry (OP65_LDX, AM65_IMM, "$00", 0, L[3]->LI);
CS_InsertEntry (S, X, I+3);
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, ZPLoc, 0, L[2]->LI);
CS_InsertEntry (S, X, I+4);
/* Insert the store through the zp pointer */
X = NewCodeEntry (OP65_STA, AM65_ZP_INDY, ZPLoc, 0, L[3]->LI);
CS_InsertEntry (S, X, I+6+K);
/* Delete the old code */
CS_DelEntry (S, I+7+K); /* jsr spaspidx */
CS_DelEntry (S, I+2); /* jsr ldauidx */
/* Create and insert the stores into the zp pointer if needed */
if (RegBank == 0) {
X = NewCodeEntry (OP65_STA, AM65_ZP, "ptr1", 0, L[0]->LI);
CS_InsertEntry (S, X, I+1);
X = NewCodeEntry (OP65_STX, AM65_ZP, "ptr1+1", 0, L[0]->LI);
CS_InsertEntry (S, X, I+2);
}
/* Delete more old code. Do it here to keep a label attached to
* entry I in place.
*/
CS_DelEntry (S, I); /* jsr pushax */
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}
static unsigned OptPtrStore2 (CodeSeg* S)
/* Search for the sequence:
*
* lda #<(label+0)
* ldx #>(label+0)
* clc
* adc xxx
* bcc L
* inx
* L: jsr pushax
* ldx #$00
* lda yyy
* ldy #$00
* jsr staspidx
*
* and replace it by:
*
* ldy xxx
* ldx #$00
* lda yyy
* sta label,y
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* L[11];
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_IMM &&
CS_GetEntries (S, L+1, I+1, 10) &&
L[1]->OPC == OP65_LDX &&
L[1]->AM == AM65_IMM &&
L[2]->OPC == OP65_CLC &&
L[3]->OPC == OP65_ADC &&
(L[3]->AM == AM65_ABS || L[3]->AM == AM65_ZP) &&
(L[4]->OPC == OP65_BCC || L[4]->OPC == OP65_JCC) &&
L[4]->JumpTo != 0 &&
L[4]->JumpTo->Owner == L[6] &&
L[5]->OPC == OP65_INX &&
CE_IsCallTo (L[6], "pushax") &&
L[7]->OPC == OP65_LDX &&
L[8]->OPC == OP65_LDA &&
L[9]->OPC == OP65_LDY &&
CE_IsKnownImm (L[9], 0) &&
CE_IsCallTo (L[10], "staspidx") &&
!CS_RangeHasLabel (S, I+1, 5) &&
!CS_RangeHasLabel (S, I+7, 4) &&
/* Check the label last because this is quite costly */
(Len = strlen (L[0]->Arg)) > 3 &&
L[0]->Arg[0] == '<' &&
L[0]->Arg[1] == '(' &&
strlen (L[1]->Arg) == Len &&
L[1]->Arg[0] == '>' &&
memcmp (L[0]->Arg+1, L[1]->Arg+1, Len-1) == 0) {
CodeEntry* X;
char* Label;
/* We will create all the new stuff behind the current one so
* we keep the line references.
*/
X = NewCodeEntry (OP65_LDY, L[3]->AM, L[3]->Arg, 0, L[0]->LI);
CS_InsertEntry (S, X, I+11);
X = NewCodeEntry (OP65_LDX, L[7]->AM, L[7]->Arg, 0, L[7]->LI);
CS_InsertEntry (S, X, I+12);
X = NewCodeEntry (OP65_LDA, L[8]->AM, L[8]->Arg, 0, L[8]->LI);
CS_InsertEntry (S, X, I+13);
Label = memcpy (xmalloc (Len-2), L[0]->Arg+2, Len-3);
Label[Len-3] = '\0';
X = NewCodeEntry (OP65_STA, AM65_ABSY, Label, 0, L[10]->LI);
CS_InsertEntry (S, X, I+14);
xfree (Label);
/* Remove the old code */
CS_DelEntries (S, I, 11);
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}
static unsigned OptPtrStore3 (CodeSeg* S)
/* Search for the sequence:
*
* lda #<(label+0)
* ldx #>(label+0)
* ldy aaa
* clc
* adc (sp),y
* bcc L
* inx
* L: jsr pushax
* ldx #$00
* lda yyy
* ldy #$00
* jsr staspidx
*
* and replace it by:
*
* ldy aaa
* ldx #$00
* lda (sp),y
* tay
* lda yyy
* sta label,y
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* L[12];
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_IMM &&
CS_GetEntries (S, L+1, I+1, 11) &&
L[1]->OPC == OP65_LDX &&
L[1]->AM == AM65_IMM &&
L[2]->OPC == OP65_LDY &&
L[3]->OPC == OP65_CLC &&
L[4]->OPC == OP65_ADC &&
L[4]->AM == AM65_ZP_INDY &&
strcmp (L[4]->Arg, "sp") == 0 &&
(L[5]->OPC == OP65_BCC || L[5]->OPC == OP65_JCC) &&
L[5]->JumpTo != 0 &&
L[5]->JumpTo->Owner == L[7] &&
L[6]->OPC == OP65_INX &&
CE_IsCallTo (L[7], "pushax") &&
L[8]->OPC == OP65_LDX &&
L[9]->OPC == OP65_LDA &&
L[10]->OPC == OP65_LDY &&
CE_IsKnownImm (L[10], 0) &&
CE_IsCallTo (L[11], "staspidx") &&
!CS_RangeHasLabel (S, I+1, 6) &&
!CS_RangeHasLabel (S, I+8, 4) &&
/* Check the label last because this is quite costly */
(Len = strlen (L[0]->Arg)) > 3 &&
L[0]->Arg[0] == '<' &&
L[0]->Arg[1] == '(' &&
strlen (L[1]->Arg) == Len &&
L[1]->Arg[0] == '>' &&
memcmp (L[0]->Arg+1, L[1]->Arg+1, Len-1) == 0) {
CodeEntry* X;
char* Label;
/* We will create all the new stuff behind the current one so
* we keep the line references.
*/
X = NewCodeEntry (OP65_LDY, L[2]->AM, L[2]->Arg, 0, L[2]->LI);
CS_InsertEntry (S, X, I+12);
X = NewCodeEntry (OP65_LDX, L[8]->AM, L[8]->Arg, 0, L[8]->LI);
CS_InsertEntry (S, X, I+13);
X = NewCodeEntry (OP65_LDA, L[4]->AM, L[4]->Arg, 0, L[4]->LI);
CS_InsertEntry (S, X, I+14);
X = NewCodeEntry (OP65_TAY, AM65_IMP, 0, 0, L[4]->LI);
CS_InsertEntry (S, X, I+15);
X = NewCodeEntry (OP65_LDA, L[9]->AM, L[9]->Arg, 0, L[9]->LI);
CS_InsertEntry (S, X, I+16);
Label = memcpy (xmalloc (Len-2), L[0]->Arg+2, Len-3);
Label[Len-3] = '\0';
X = NewCodeEntry (OP65_STA, AM65_ABSY, Label, 0, L[11]->LI);
CS_InsertEntry (S, X, I+17);
xfree (Label);
/* Remove the old code */
CS_DelEntries (S, I, 12);
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Free the register info */
CS_FreeRegInfo (S);
/* Return the number of changes made */
return Changes;
@ -1476,9 +1121,11 @@ static OptFunc DOptPtrLoad14 = { OptPtrLoad14, "OptPtrLoad14", 108, 0,
static OptFunc DOptPtrLoad15 = { OptPtrLoad15, "OptPtrLoad15", 86, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrLoad16 = { OptPtrLoad16, "OptPtrLoad16", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrLoad17 = { OptPtrLoad17, "OptPtrLoad17", 190, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore1 = { OptPtrStore1, "OptPtrStore1", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore2 = { OptPtrStore2, "OptPtrStore2", 40, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore1 = { OptPtrStore1, "OptPtrStore1", 40, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore2 = { OptPtrStore2, "OptPtrStore2", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore3 = { OptPtrStore3, "OptPtrStore3", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore4 = { OptPtrStore4, "OptPtrStore4", 65, 0, 0, 0, 0, 0 };
static OptFunc DOptPtrStore5 = { OptPtrStore5, "OptPtrStore5", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptPush1 = { OptPush1, "OptPush1", 65, 0, 0, 0, 0, 0 };
static OptFunc DOptPush2 = { OptPush2, "OptPush2", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptPushPop = { OptPushPop, "OptPushPop", 0, 0, 0, 0, 0, 0 };
@ -1570,6 +1217,8 @@ static OptFunc* OptFuncs[] = {
&DOptPtrStore1,
&DOptPtrStore2,
&DOptPtrStore3,
&DOptPtrStore4,
&DOptPtrStore5,
&DOptPush1,
&DOptPush2,
&DOptPushPop,
@ -1842,6 +1491,8 @@ static unsigned RunOptGroup1 (CodeSeg* S)
Changes += RunOptFunc (S, &DOptPtrStore1, 1);
Changes += RunOptFunc (S, &DOptPtrStore2, 1);
Changes += RunOptFunc (S, &DOptPtrStore3, 1);
Changes += RunOptFunc (S, &DOptPtrStore4, 1);
Changes += RunOptFunc (S, &DOptPtrStore5, 1);
Changes += RunOptFunc (S, &DOptAdd3, 1); /* Before OptPtrLoad5! */
Changes += RunOptFunc (S, &DOptPtrLoad1, 1);
Changes += RunOptFunc (S, &DOptPtrLoad2, 1);

721
src/cc65/coptptrstore.c Normal file
View File

@ -0,0 +1,721 @@
/*****************************************************************************/
/* */
/* coptptrstore.c */
/* */
/* Optimize stores through pointers */
/* */
/* */
/* */
/* (C) 2012, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <string.h>
/* common */
#include "xmalloc.h"
/* cc65 */
#include "codeent.h"
#include "codeinfo.h"
#include "coptptrstore.h"
/*****************************************************************************/
/* Helper functions */
/*****************************************************************************/
static unsigned OptPtrStore1Sub (CodeSeg* S, unsigned I, CodeEntry** const L)
/* Check if this is one of the allowed suboperation for OptPtrStore1 */
{
/* Check for a label attached to the entry */
if (CE_HasLabel (L[0])) {
return 0;
}
/* Check for single insn sub ops */
if (L[0]->OPC == OP65_AND ||
L[0]->OPC == OP65_EOR ||
L[0]->OPC == OP65_ORA ||
(L[0]->OPC == OP65_JSR && strncmp (L[0]->Arg, "shlax", 5) == 0) ||
(L[0]->OPC == OP65_JSR && strncmp (L[0]->Arg, "shrax", 5) == 0)) {
/* One insn */
return 1;
} else if (L[0]->OPC == OP65_CLC &&
(L[1] = CS_GetNextEntry (S, I)) != 0 &&
L[1]->OPC == OP65_ADC &&
!CE_HasLabel (L[1])) {
return 2;
} else if (L[0]->OPC == OP65_SEC &&
(L[1] = CS_GetNextEntry (S, I)) != 0 &&
L[1]->OPC == OP65_SBC &&
!CE_HasLabel (L[1])) {
return 2;
}
/* Not found */
return 0;
}
static const char* ZPLoadAX (CodeSeg* S, unsigned I)
/* If the two instructions at S/I are a load of A/X from a two byte zero byte
* location, return the name of the zero page location. Otherwise return NULL.
*/
{
CodeEntry* L[2];
unsigned Len;
if (CS_GetEntries (S, L, I, 2) &&
L[0]->OPC == OP65_LDA &&
L[0]->AM == AM65_ZP &&
L[1]->OPC == OP65_LDX &&
L[1]->AM == AM65_ZP &&
!CE_HasLabel (L[1]) &&
(Len = strlen (L[0]->Arg)) == strlen (L[1]->Arg) - 2 &&
memcmp (L[0]->Arg, L[1]->Arg, Len) == 0 &&
L[1]->Arg[Len] == '+' &&
L[1]->Arg[Len+1] == '1') {
/* Return the label */
return L[0]->Arg;
} else {
/* Not found */
return 0;
}
}
/*****************************************************************************/
/* Code */
/*****************************************************************************/
unsigned OptPtrStore1 (CodeSeg* S)
/* Search for the sequence:
*
* lda #<(label+0)
* ldx #>(label+0)
* clc
* adc xxx
* bcc L
* inx
* L: jsr pushax
* ldx #$00
* lda yyy
* ldy #$00
* jsr staspidx
*
* and replace it by:
*
* ldy xxx
* ldx #$00
* lda yyy
* sta label,y
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* L[11];
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_IMM &&
CS_GetEntries (S, L+1, I+1, 10) &&
L[1]->OPC == OP65_LDX &&
L[1]->AM == AM65_IMM &&
L[2]->OPC == OP65_CLC &&
L[3]->OPC == OP65_ADC &&
(L[3]->AM == AM65_ABS || L[3]->AM == AM65_ZP) &&
(L[4]->OPC == OP65_BCC || L[4]->OPC == OP65_JCC) &&
L[4]->JumpTo != 0 &&
L[4]->JumpTo->Owner == L[6] &&
L[5]->OPC == OP65_INX &&
CE_IsCallTo (L[6], "pushax") &&
L[7]->OPC == OP65_LDX &&
L[8]->OPC == OP65_LDA &&
L[9]->OPC == OP65_LDY &&
CE_IsKnownImm (L[9], 0) &&
CE_IsCallTo (L[10], "staspidx") &&
!CS_RangeHasLabel (S, I+1, 5) &&
!CS_RangeHasLabel (S, I+7, 4) &&
/* Check the label last because this is quite costly */
(Len = strlen (L[0]->Arg)) > 3 &&
L[0]->Arg[0] == '<' &&
L[0]->Arg[1] == '(' &&
strlen (L[1]->Arg) == Len &&
L[1]->Arg[0] == '>' &&
memcmp (L[0]->Arg+1, L[1]->Arg+1, Len-1) == 0) {
CodeEntry* X;
char* Label;
/* We will create all the new stuff behind the current one so
* we keep the line references.
*/
X = NewCodeEntry (OP65_LDY, L[3]->AM, L[3]->Arg, 0, L[0]->LI);
CS_InsertEntry (S, X, I+11);
X = NewCodeEntry (OP65_LDX, L[7]->AM, L[7]->Arg, 0, L[7]->LI);
CS_InsertEntry (S, X, I+12);
X = NewCodeEntry (OP65_LDA, L[8]->AM, L[8]->Arg, 0, L[8]->LI);
CS_InsertEntry (S, X, I+13);
Label = memcpy (xmalloc (Len-2), L[0]->Arg+2, Len-3);
Label[Len-3] = '\0';
X = NewCodeEntry (OP65_STA, AM65_ABSY, Label, 0, L[10]->LI);
CS_InsertEntry (S, X, I+14);
xfree (Label);
/* Remove the old code */
CS_DelEntries (S, I, 11);
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}
unsigned OptPtrStore2 (CodeSeg* S)
/* Search for the sequence:
*
* lda #<(label+0)
* ldx #>(label+0)
* ldy aaa
* clc
* adc (sp),y
* bcc L
* inx
* L: jsr pushax
* ldx #$00
* lda yyy
* ldy #$00
* jsr staspidx
*
* and replace it by:
*
* ldy aaa
* ldx #$00
* lda (sp),y
* tay
* lda yyy
* sta label,y
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* L[12];
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_IMM &&
CS_GetEntries (S, L+1, I+1, 11) &&
L[1]->OPC == OP65_LDX &&
L[1]->AM == AM65_IMM &&
L[2]->OPC == OP65_LDY &&
L[3]->OPC == OP65_CLC &&
L[4]->OPC == OP65_ADC &&
L[4]->AM == AM65_ZP_INDY &&
(L[5]->OPC == OP65_BCC || L[5]->OPC == OP65_JCC) &&
L[5]->JumpTo != 0 &&
L[5]->JumpTo->Owner == L[7] &&
L[6]->OPC == OP65_INX &&
CE_IsCallTo (L[7], "pushax") &&
L[8]->OPC == OP65_LDX &&
L[9]->OPC == OP65_LDA &&
L[10]->OPC == OP65_LDY &&
CE_IsKnownImm (L[10], 0) &&
CE_IsCallTo (L[11], "staspidx") &&
!CS_RangeHasLabel (S, I+1, 6) &&
!CS_RangeHasLabel (S, I+8, 4) &&
/* Check the label last because this is quite costly */
(Len = strlen (L[0]->Arg)) > 3 &&
L[0]->Arg[0] == '<' &&
L[0]->Arg[1] == '(' &&
strlen (L[1]->Arg) == Len &&
L[1]->Arg[0] == '>' &&
memcmp (L[0]->Arg+1, L[1]->Arg+1, Len-1) == 0) {
CodeEntry* X;
char* Label;
/* We will create all the new stuff behind the current one so
* we keep the line references.
*/
X = NewCodeEntry (OP65_LDY, L[2]->AM, L[2]->Arg, 0, L[2]->LI);
CS_InsertEntry (S, X, I+12);
X = NewCodeEntry (OP65_LDX, L[8]->AM, L[8]->Arg, 0, L[8]->LI);
CS_InsertEntry (S, X, I+13);
X = NewCodeEntry (OP65_LDA, L[4]->AM, L[4]->Arg, 0, L[4]->LI);
CS_InsertEntry (S, X, I+14);
X = NewCodeEntry (OP65_TAY, AM65_IMP, 0, 0, L[4]->LI);
CS_InsertEntry (S, X, I+15);
X = NewCodeEntry (OP65_LDA, L[9]->AM, L[9]->Arg, 0, L[9]->LI);
CS_InsertEntry (S, X, I+16);
Label = memcpy (xmalloc (Len-2), L[0]->Arg+2, Len-3);
Label[Len-3] = '\0';
X = NewCodeEntry (OP65_STA, AM65_ABSY, Label, 0, L[11]->LI);
CS_InsertEntry (S, X, I+17);
xfree (Label);
/* Remove the old code */
CS_DelEntries (S, I, 12);
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}
unsigned OptPtrStore3 (CodeSeg* S)
/* Search for the sequence:
*
* lda #<(label+0)
* ldx #>(label+0)
* ldy aaa
* clc
* adc (sp),y
* bcc L
* inx
* L: jsr pushax
* ldy #bbb
* ldx #$00
* lda (sp),y
* ldy #$00
* jsr staspidx
*
* and replace it by:
*
* ldy aaa
* lda (sp),y
* tax
* ldy #bbb-2
* lda (sp),y
* sta label,x
* ldx #$00
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* L[13];
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_IMM &&
CS_GetEntries (S, L+1, I+1, 12) &&
L[1]->OPC == OP65_LDX &&
L[1]->AM == AM65_IMM &&
L[2]->OPC == OP65_LDY &&
L[3]->OPC == OP65_CLC &&
L[4]->OPC == OP65_ADC &&
L[4]->AM == AM65_ZP_INDY &&
(L[5]->OPC == OP65_BCC || L[5]->OPC == OP65_JCC) &&
L[5]->JumpTo != 0 &&
L[5]->JumpTo->Owner == L[7] &&
L[6]->OPC == OP65_INX &&
CE_IsCallTo (L[7], "pushax") &&
L[8]->OPC == OP65_LDY &&
CE_IsConstImm (L[8]) &&
L[8]->Num >= 2 &&
L[9]->OPC == OP65_LDX &&
L[10]->OPC == OP65_LDA &&
L[10]->AM == AM65_ZP_INDY &&
L[11]->OPC == OP65_LDY &&
CE_IsKnownImm (L[11], 0) &&
CE_IsCallTo (L[12], "staspidx") &&
!CS_RangeHasLabel (S, I+1, 6) &&
!CS_RangeHasLabel (S, I+8, 5) &&
/* Check the label last because this is quite costly */
(Len = strlen (L[0]->Arg)) > 3 &&
L[0]->Arg[0] == '<' &&
L[0]->Arg[1] == '(' &&
strlen (L[1]->Arg) == Len &&
L[1]->Arg[0] == '>' &&
memcmp (L[0]->Arg+1, L[1]->Arg+1, Len-1) == 0) {
CodeEntry* X;
const char* Arg;
char* Label;
/* We will create all the new stuff behind the current one so
* we keep the line references.
*/
X = NewCodeEntry (OP65_LDY, L[2]->AM, L[2]->Arg, 0, L[2]->LI);
CS_InsertEntry (S, X, I+13);
X = NewCodeEntry (OP65_LDA, L[4]->AM, L[4]->Arg, 0, L[4]->LI);
CS_InsertEntry (S, X, I+14);
X = NewCodeEntry (OP65_TAX, AM65_IMP, 0, 0, L[4]->LI);
CS_InsertEntry (S, X, I+15);
Arg = MakeHexArg (L[8]->Num - 2);
X = NewCodeEntry (OP65_LDY, L[8]->AM, Arg, 0, L[8]->LI);
CS_InsertEntry (S, X, I+16);
X = NewCodeEntry (OP65_LDA, L[10]->AM, L[10]->Arg, 0, L[10]->LI);
CS_InsertEntry (S, X, I+17);
Label = memcpy (xmalloc (Len-2), L[0]->Arg+2, Len-3);
Label[Len-3] = '\0';
X = NewCodeEntry (OP65_STA, AM65_ABSX, Label, 0, L[12]->LI);
CS_InsertEntry (S, X, I+18);
xfree (Label);
X = NewCodeEntry (OP65_LDX, L[9]->AM, L[9]->Arg, 0, L[9]->LI);
CS_InsertEntry (S, X, I+19);
/* Remove the old code */
CS_DelEntries (S, I, 13);
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}
unsigned OptPtrStore4 (CodeSeg* S)
/* Search for the sequence:
*
* clc
* adc xxx
* bcc L
* inx
* L: jsr pushax
* ldx #$00
* lda yyy
* ldy #$00
* jsr staspidx
*
* and replace it by:
*
* sta ptr1
* stx ptr1+1
* ldy xxx
* ldx #$00
* lda yyy
* sta (ptr1),y
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
CodeEntry* L[9];
/* Get next entry */
L[0] = CS_GetEntry (S, I);
/* Check for the sequence */
if (L[0]->OPC == OP65_CLC &&
CS_GetEntries (S, L+1, I+1, 8) &&
L[1]->OPC == OP65_ADC &&
(L[1]->AM == AM65_ABS ||
L[1]->AM == AM65_ZP ||
L[1]->AM == AM65_IMM) &&
(L[2]->OPC == OP65_BCC || L[2]->OPC == OP65_JCC) &&
L[2]->JumpTo != 0 &&
L[2]->JumpTo->Owner == L[4] &&
L[3]->OPC == OP65_INX &&
CE_IsCallTo (L[4], "pushax") &&
L[5]->OPC == OP65_LDX &&
L[6]->OPC == OP65_LDA &&
L[7]->OPC == OP65_LDY &&
CE_IsKnownImm (L[7], 0) &&
CE_IsCallTo (L[8], "staspidx") &&
!CS_RangeHasLabel (S, I+1, 3) &&
!CS_RangeHasLabel (S, I+5, 4)) {
CodeEntry* X;
const char* ZPLoc;
/* Track the insertion point */
unsigned IP = I + 9;
/* If the sequence is preceeded by a load of a ZP value, we can
* use this ZP value as a pointer.
*/
if (I < 2 || (ZPLoc = ZPLoadAX (S, I-2)) == 0) {
ZPLoc = "ptr1";
/* Must use ptr1 */
X = NewCodeEntry (OP65_STA, AM65_ZP, "ptr1", 0, L[8]->LI);
CS_InsertEntry (S, X, IP++);
X = NewCodeEntry (OP65_STX, AM65_ZP, "ptr1+1", 0, L[8]->LI);
CS_InsertEntry (S, X, IP++);
}
X = NewCodeEntry (OP65_LDY, L[1]->AM, L[1]->Arg, 0, L[1]->LI);
CS_InsertEntry (S, X, IP++);
X = NewCodeEntry (OP65_LDX, L[5]->AM, L[5]->Arg, 0, L[5]->LI);
CS_InsertEntry (S, X, IP++);
X = NewCodeEntry (OP65_LDA, L[6]->AM, L[6]->Arg, 0, L[6]->LI);
CS_InsertEntry (S, X, IP++);
X = NewCodeEntry (OP65_STA, AM65_ZP_INDY, ZPLoc, 0, L[8]->LI);
CS_InsertEntry (S, X, IP++);
/* Remove the old code */
CS_DelEntries (S, I, 9);
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}
unsigned OptPtrStore5 (CodeSeg* S)
/* Search for the sequence:
*
* jsr pushax
* ldy xxx
* jsr ldauidx
* subop
* ldy yyy
* jsr staspidx
*
* and replace it by:
*
* sta ptr1
* stx ptr1+1
* ldy xxx
* ldx #$00
* lda (ptr1),y
* subop
* ldy yyy
* sta (ptr1),y
*
* In case a/x is loaded from the register bank before the pushax, we can even
* use the register bank instead of ptr1.
*
*
* jsr pushax
* ldy xxx
* jsr ldauidx
* ldx #$00
* lda (zp),y
* subop
* ldy yyy
* sta (zp),y
* jsr staspidx
*/
{
unsigned Changes = 0;
/* Walk over the entries */
unsigned I = 0;
while (I < CS_GetEntryCount (S)) {
unsigned K;
CodeEntry* L[10];
/* Get next entry */
L[0] = CS_GetEntry (S, I);
/* Check for the sequence */
if (CE_IsCallTo (L[0], "pushax") &&
CS_GetEntries (S, L+1, I+1, 3) &&
L[1]->OPC == OP65_LDY &&
CE_IsConstImm (L[1]) &&
!CE_HasLabel (L[1]) &&
CE_IsCallTo (L[2], "ldauidx") &&
!CE_HasLabel (L[2]) &&
(K = OptPtrStore1Sub (S, I+3, L+3)) > 0 &&
CS_GetEntries (S, L+3+K, I+3+K, 2) &&
L[3+K]->OPC == OP65_LDY &&
CE_IsConstImm (L[3+K]) &&
!CE_HasLabel (L[3+K]) &&
CE_IsCallTo (L[4+K], "staspidx") &&
!CE_HasLabel (L[4+K])) {
const char* RegBank = 0;
const char* ZPLoc = "ptr1";
CodeEntry* X;
/* Get the preceeding two instructions and check them. We check
* for:
* lda regbank+n
* ldx regbank+n+1
*/
if (I > 1) {
CodeEntry* P[2];
P[0] = CS_GetEntry (S, I-2);
P[1] = CS_GetEntry (S, I-1);
if (P[0]->OPC == OP65_LDA &&
P[0]->AM == AM65_ZP &&
P[1]->OPC == OP65_LDX &&
P[1]->AM == AM65_ZP &&
!CE_HasLabel (P[1]) &&
strncmp (P[0]->Arg, "regbank+", 8) == 0) {
unsigned Len = strlen (P[0]->Arg);
if (strncmp (P[0]->Arg, P[1]->Arg, Len) == 0 &&
P[1]->Arg[Len+0] == '+' &&
P[1]->Arg[Len+1] == '1' &&
P[1]->Arg[Len+2] == '\0') {
/* Ok, found. Use the name of the register bank */
RegBank = ZPLoc = P[0]->Arg;
}
}
}
/* Insert the load via the zp pointer */
X = NewCodeEntry (OP65_LDX, AM65_IMM, "$00", 0, L[3]->LI);
CS_InsertEntry (S, X, I+3);
X = NewCodeEntry (OP65_LDA, AM65_ZP_INDY, ZPLoc, 0, L[2]->LI);
CS_InsertEntry (S, X, I+4);
/* Insert the store through the zp pointer */
X = NewCodeEntry (OP65_STA, AM65_ZP_INDY, ZPLoc, 0, L[3]->LI);
CS_InsertEntry (S, X, I+6+K);
/* Delete the old code */
CS_DelEntry (S, I+7+K); /* jsr spaspidx */
CS_DelEntry (S, I+2); /* jsr ldauidx */
/* Create and insert the stores into the zp pointer if needed */
if (RegBank == 0) {
X = NewCodeEntry (OP65_STA, AM65_ZP, "ptr1", 0, L[0]->LI);
CS_InsertEntry (S, X, I+1);
X = NewCodeEntry (OP65_STX, AM65_ZP, "ptr1+1", 0, L[0]->LI);
CS_InsertEntry (S, X, I+2);
}
/* Delete more old code. Do it here to keep a label attached to
* entry I in place.
*/
CS_DelEntry (S, I); /* jsr pushax */
/* Remember, we had changes */
++Changes;
}
/* Next entry */
++I;
}
/* Return the number of changes made */
return Changes;
}

1
src/cc65/make/gcc.mak
View File

@ -60,6 +60,7 @@ OBJS = anonname.o \
coptind.o \
coptneg.o \
coptptrload.o \
coptptrstore.o \
coptpush.o \
coptsize.o \
coptstop.o \