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More splitting
git-svn-id: svn://svn.cc65.org/cc65/trunk@983 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
parent
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@ -52,6 +52,7 @@
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#include "coptind.h"
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#include "coptstop.h"
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#include "coptsub.h"
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#include "copttest.h"
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#include "error.h"
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#include "global.h"
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#include "codeopt.h"
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@ -112,101 +113,6 @@ static unsigned OptShift1 (CodeSeg* S)
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/*****************************************************************************/
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/* Optimize tests */
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/*****************************************************************************/
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static unsigned OptTest1 (CodeSeg* S)
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/* On a sequence
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*
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* stx xxx
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* ora xxx
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* beq/bne ...
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*
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* if X is zero, the sequence may be changed to
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*
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* cmp #$00
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* beq/bne ...
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*
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* which may be optimized further by another step.
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*
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* If A is zero, the sequence may be changed to
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*
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* txa
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* beq/bne ...
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*
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*/
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{
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unsigned Changes = 0;
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unsigned I;
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/* Generate register info for this step */
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CS_GenRegInfo (S);
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/* Walk over the entries */
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I = 0;
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while (I < CS_GetEntryCount (S)) {
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CodeEntry* L[3];
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/* Get next entry */
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L[0] = CS_GetEntry (S, I);
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/* Check if it's the sequence we're searching for */
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if (L[0]->OPC == OP65_STX &&
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CS_GetEntries (S, L+1, I+1, 2) &&
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!CE_HasLabel (L[1]) &&
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L[1]->OPC == OP65_ORA &&
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strcmp (L[0]->Arg, L[1]->Arg) == 0 &&
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!CE_HasLabel (L[2]) &&
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(L[2]->Info & OF_ZBRA) != 0) {
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/* Check if X is zero */
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if (L[0]->RI->In.RegX == 0) {
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/* Insert the compare */
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CodeEntry* N = NewCodeEntry (OP65_CMP, AM65_IMM, "$00", 0, L[0]->LI);
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CS_InsertEntry (S, N, I+2);
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/* Remove the two other insns */
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CS_DelEntry (S, I+1);
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CS_DelEntry (S, I);
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/* We had changes */
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++Changes;
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/* Check if A is zero */
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} else if (L[1]->RI->In.RegA == 0) {
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/* Insert the txa */
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CodeEntry* N = NewCodeEntry (OP65_TXA, AM65_IMP, 0, 0, L[1]->LI);
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CS_InsertEntry (S, N, I+2);
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/* Remove the two other insns */
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CS_DelEntry (S, I+1);
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CS_DelEntry (S, I);
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/* We had changes */
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++Changes;
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}
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}
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/* Next entry */
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++I;
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}
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/* Free register info */
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CS_FreeRegInfo (S);
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/* Return the number of changes made */
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return Changes;
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}
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/*****************************************************************************/
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/* nega optimizations */
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/*****************************************************************************/
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@ -1679,7 +1585,7 @@ static unsigned RunOptFunc (CodeSeg* S, OptFunc* F, unsigned Max)
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/* Run this until there are no more changes */
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Changes = 0;
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do {
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/* Run the function */
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C = F->Func (S);
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Changes += C;
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139
src/cc65/copttest.c
Normal file
139
src/cc65/copttest.c
Normal file
@ -0,0 +1,139 @@
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/*****************************************************************************/
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/* */
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/* copttest.c */
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/* */
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/* Optimize test sequences */
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/* */
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/* */
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/* */
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/* (C) 2001 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <string.h>
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/* cc65 */
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#include "codeent.h"
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#include "codeinfo.h"
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#include "copttest.h"
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/*****************************************************************************/
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/* Optimize tests */
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/*****************************************************************************/
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unsigned OptTest1 (CodeSeg* S)
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/* Given a sequence
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*
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* stx xxx
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* ora xxx
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* beq/bne ...
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*
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* If X is zero, the sequence may be changed to
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*
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* cmp #$00
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* beq/bne ...
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*
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* which may be optimized further by another step.
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*
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* If A is zero, the sequence may be changed to
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*
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* txa
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* beq/bne ...
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*
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*/
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{
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unsigned Changes = 0;
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unsigned I;
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/* Generate register info for this step */
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CS_GenRegInfo (S);
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/* Walk over the entries */
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I = 0;
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while (I < CS_GetEntryCount (S)) {
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CodeEntry* L[3];
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/* Get next entry */
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L[0] = CS_GetEntry (S, I);
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/* Check if it's the sequence we're searching for */
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if (L[0]->OPC == OP65_STX &&
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CS_GetEntries (S, L+1, I+1, 2) &&
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!CE_HasLabel (L[1]) &&
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L[1]->OPC == OP65_ORA &&
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strcmp (L[0]->Arg, L[1]->Arg) == 0 &&
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!CE_HasLabel (L[2]) &&
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(L[2]->Info & OF_ZBRA) != 0) {
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/* Check if X is zero */
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if (L[0]->RI->In.RegX == 0) {
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/* Insert the compare */
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CodeEntry* N = NewCodeEntry (OP65_CMP, AM65_IMM, "$00", 0, L[0]->LI);
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CS_InsertEntry (S, N, I+2);
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/* Remove the two other insns */
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CS_DelEntry (S, I+1);
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CS_DelEntry (S, I);
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/* We had changes */
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++Changes;
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/* Check if A is zero */
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} else if (L[1]->RI->In.RegA == 0) {
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/* Insert the txa */
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CodeEntry* N = NewCodeEntry (OP65_TXA, AM65_IMP, 0, 0, L[1]->LI);
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CS_InsertEntry (S, N, I+2);
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/* Remove the two other insns */
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CS_DelEntry (S, I+1);
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CS_DelEntry (S, I);
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/* We had changes */
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++Changes;
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}
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}
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/* Next entry */
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++I;
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}
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/* Free register info */
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CS_FreeRegInfo (S);
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/* Return the number of changes made */
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return Changes;
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}
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80
src/cc65/copttest.h
Normal file
80
src/cc65/copttest.h
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@ -0,0 +1,80 @@
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/*****************************************************************************/
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/* */
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/* copttest.h */
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/* */
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/* Optimize test sequences */
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/* */
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/* */
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/* */
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/* (C) 2001 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef COPTTEST_H
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#define COPTTEST_H
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/* cc65 */
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#include "codeseg.h"
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/*****************************************************************************/
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/* Optimize tests */
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/*****************************************************************************/
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unsigned OptTest1 (CodeSeg* S);
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/* Given a sequence
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*
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* stx xxx
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* ora xxx
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* beq/bne ...
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*
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* If X is zero, the sequence may be changed to
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*
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* cmp #$00
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* beq/bne ...
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*
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* which may be optimized further by another step.
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*
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* If A is zero, the sequence may be changed to
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*
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* txa
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* beq/bne ...
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*
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*/
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/* End of copttest.h */
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#endif
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@ -38,6 +38,7 @@ OBJS = anonname.o \
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coptind.o \
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coptstop.o \
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coptsub.o \
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copttest.o \
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cpu.o \
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dataseg.o \
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datatype.o \
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@ -83,6 +83,7 @@ OBJS = anonname.obj \
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coptind.obj \
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coptstop.obj \
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coptsub.obj \
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copttest.obj \
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cpu.obj \
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dataseg.obj \
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datatype.obj \
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@ -156,6 +157,7 @@ FILE coptcmp.obj
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FILE coptind.obj
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FILE coptstop.obj
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FILE coptsub.obj
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FILE copttest.obj
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FILE cpu.obj
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FILE dataseg.obj
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FILE datatype.obj
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