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Optimize short float arrays

This commit is contained in:
drmortalwombat 2021-12-22 15:36:12 +01:00
parent 183864208f
commit 6b7dc15d30
2 changed files with 80 additions and 1 deletions
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80
oscar64/NativeCodeGenerator.cpp
View File

@ -8851,6 +8851,69 @@ bool NativeCodeBasicBlock::PatchDirectAddressSumY(int at, int reg, int apos, int
return true;
}
bool NativeCodeBasicBlock::PatchAddressSumY(int at, int reg, int apos, int breg, int ireg)
{
int yindex = 0;
int last = at;
while (last < mIns.Size())
{
if (mIns[last].mType == ASMIT_LDY && mIns[last].mMode == ASMIM_IMMEDIATE && (mIns[last].mAddress == yindex || mIns[last].mAddress == yindex + 1))
yindex = mIns[last].mAddress;
else if (mIns[last].ChangesYReg())
return false;
else if (mIns[last].mMode == ASMIM_ZERO_PAGE && (mIns[last].mAddress == breg || mIns[last].mAddress == breg + 1 || mIns[last].mAddress == reg || mIns[last].mAddress == reg + 1) && mIns[last].ChangesAddress())
return false;
else if (mIns[last].mMode == ASMIM_INDIRECT_Y && mIns[last].mAddress == reg)
{
if (!(mIns[last].mLive & LIVE_MEM))
break;
}
else if (mIns[last].RequiresYReg())
return false;
last++;
}
if (last == mIns.Size())
return false;
for (int i = 0; i < 6; i++)
{
mIns[apos + i + 1].mType = ASMIT_NOP;
mIns[apos + i + 1].mMode = ASMIM_IMPLIED;
}
mIns[at].mMode = ASMIM_ZERO_PAGE;
mIns[at].mAddress = ireg;
yindex = 0;
for (int i = at + 1; i <= last; i++)
{
mIns[i].mLive | LIVE_CPU_REG_Y;
if (mIns[i].mType == ASMIT_LDY && mIns[i].mMode == ASMIM_IMMEDIATE)
{
if (mIns[i].mAddress == yindex)
{
mIns[i].mType = ASMIT_NOP;
mIns[i].mMode = ASMIM_IMPLIED;
}
else
{
mIns[i].mType = ASMIT_INY;
mIns[i].mMode = ASMIM_IMPLIED;
yindex++;
}
}
else if (mIns[i].mMode == ASMIM_INDIRECT_Y && mIns[i].mAddress == reg)
{
mIns[i].mAddress = breg;
}
}
return true;
}
bool NativeCodeBasicBlock::FindDirectAddressSumY(int at, int reg, int& apos, int& breg)
{
int j = at - 6;
@ -10914,7 +10977,6 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
if (FindAddressSumY(i, sreg, apos, breg, ireg))
{
if (!(breg == sreg || ireg == sreg)|| !(mIns[i + 0].mLive & LIVE_MEM))
{
if (breg == sreg || ireg == sreg)
@ -11406,6 +11468,22 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
}
#endif
#if 1
if (
mIns[i + 0].mType == ASMIT_LDY && mIns[i + 0].mMode == ASMIM_IMMEDIATE && mIns[i + 0].mAddress == 0 &&
mIns[i + 1].mMode == ASMIM_INDIRECT_Y)
{
int sreg = mIns[i + 1].mAddress;
int apos, breg, ireg;
if (FindAddressSumY(i, sreg, apos, breg, ireg))
{
if (PatchAddressSumY(i, sreg, apos, breg, ireg))
progress = true;
}
}
#endif
#if 1
if (

1
oscar64/NativeCodeGenerator.h
View File

@ -200,6 +200,7 @@ public:
bool FindDirectAddressSumY(int at, int reg, int& apos, int& breg);
bool PatchDirectAddressSumY(int at, int reg, int apos, int breg);
bool FindAddressSumY(int at, int reg, int & apos, int& breg, int& ireg);
bool PatchAddressSumY(int at, int reg, int apos, int breg, int ireg);
bool FindGlobalAddress(int at, int reg, int& apos);
bool FindGlobalAddressSumY(int at, int reg, bool direct, int& apos, const NativeCodeInstruction * & ains, const NativeCodeInstruction*& iins, uint32 & flags);
bool FindPageStartAddress(int at, int reg, int& addr);