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Improve double index register single block loops

This commit is contained in:
drmortalwombat 2025-03-29 13:30:03 +01:00
parent 65ad05c608
commit 0dc6588a66
1 changed files with 42 additions and 2 deletions
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44
oscar64/NativeCodeGenerator.cpp
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@ -39511,7 +39511,6 @@ bool NativeCodeBasicBlock::OptimizeSimpleLoopInvariant(NativeCodeProcedure* proc
changed = true; changed = true;
} }
} }
} }
return changed; return changed;
@ -40131,6 +40130,47 @@ bool NativeCodeBasicBlock::OptimizeSimpleLoop(NativeCodeProcedure * proc, bool f
else if (mIns[i].mType != ASMIT_LDA && mIns[i].mMode == ASMIM_ZERO_PAGE && mIns[i].mAddress == zreg) else if (mIns[i].mType != ASMIT_LDA && mIns[i].mMode == ASMIM_ZERO_PAGE && mIns[i].mAddress == zreg)
xother = true; xother = true;
} }
if (yindex && yother)
{
for (int i = 0; i < sz - 3; i++)
{
if (mIns[i].mMode == ASMIM_ZERO_PAGE && mIns[i].mAddress == zreg)
;
else if (mIns[i].mType == ASMIT_TAY && !(mIns[i].mLive & LIVE_CPU_REG_X) && mIns[i + 1].mMode == ASMIM_ABSOLUTE_Y && HasAsmInstructionMode(mIns[i + 1].mType, ASMIM_ABSOLUTE_X) && !(mIns[i + 1].mLive & LIVE_CPU_REG_Y))
{
mIns[i].mType = ASMIT_TAX; mIns[i].mLive |= LIVE_CPU_REG_X; mIns[i].mLive &= ~LIVE_CPU_REG_Y;
mIns[i + 1].mMode = ASMIM_ABSOLUTE_X;
changed = true;
}
else if (mIns[i].mType == ASMIT_LDY && HasAsmInstructionMode(ASMIT_LDX, mIns[i].mMode) && !(mIns[i].mLive & LIVE_CPU_REG_X) && mIns[i + 1].mMode == ASMIM_ABSOLUTE_Y && HasAsmInstructionMode(mIns[i + 1].mType, ASMIM_ABSOLUTE_X) && !(mIns[i + 1].mLive & LIVE_CPU_REG_Y))
{
mIns[i].mType = ASMIT_LDX; mIns[i].mLive |= LIVE_CPU_REG_X; mIns[i].mLive &= ~LIVE_CPU_REG_Y;
mIns[i + 1].mMode = ASMIM_ABSOLUTE_X;
changed = true;
}
}
}
else if (xindex && xother)
{
for (int i = 0; i < sz-3; i++)
{
if (mIns[i].mMode == ASMIM_ZERO_PAGE && mIns[i].mAddress == zreg)
;
else if (mIns[i].mType == ASMIT_TAX && !(mIns[i].mLive & LIVE_CPU_REG_Y) && mIns[i + 1].mMode == ASMIM_ABSOLUTE_X && HasAsmInstructionMode(mIns[i + 1].mType, ASMIM_ABSOLUTE_Y) && !(mIns[i + 1].mLive & LIVE_CPU_REG_X))
{
mIns[i].mType = ASMIT_TAY; mIns[i].mLive |= LIVE_CPU_REG_Y; mIns[i].mLive &= ~LIVE_CPU_REG_X;
mIns[i + 1].mMode = ASMIM_ABSOLUTE_Y;
changed = true;
}
else if (mIns[i].mType == ASMIT_LDX && HasAsmInstructionMode(ASMIT_LDY, mIns[i].mMode) && !(mIns[i].mLive & LIVE_CPU_REG_Y) && mIns[i + 1].mMode == ASMIM_ABSOLUTE_X && HasAsmInstructionMode(mIns[i + 1].mType, ASMIM_ABSOLUTE_Y) && !(mIns[i + 1].mLive & LIVE_CPU_REG_X))
{
mIns[i].mType = ASMIT_LDY; mIns[i].mLive |= LIVE_CPU_REG_Y; mIns[i].mLive &= ~LIVE_CPU_REG_X;
mIns[i + 1].mMode = ASMIM_ABSOLUTE_Y;
changed = true;
}
}
}
if (!yother) if (!yother)
{ {
@ -53298,7 +53338,7 @@ void NativeCodeProcedure::Compile(InterCodeProcedure* proc)
mInterProc->mLinkerObject->mNativeProc = this; mInterProc->mLinkerObject->mNativeProc = this;
CheckFunc = !strcmp(mIdent->mString, "isinf"); CheckFunc = !strcmp(mIdent->mString, "equipment_scroll_down");
int nblocks = proc->mBlocks.Size(); int nblocks = proc->mBlocks.Size();
tblocks = new NativeCodeBasicBlock * [nblocks]; tblocks = new NativeCodeBasicBlock * [nblocks];