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Fix carray propagation in 16bit subtract with low byte const

This commit is contained in:
drmortalwombat 2022-08-20 14:03:46 +02:00
parent 1805e311b8
commit eafe13e557
1 changed files with 168 additions and 38 deletions
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206
oscar64/NativeCodeGenerator.cpp
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@ -2113,8 +2113,8 @@ bool NativeCodeInstruction::BitFieldForwarding(NativeRegisterDataSet& data, AsmI
(data.mRegs[mAddress].mMask & data.mRegs[mAddress].mValue) &
(data.mRegs[CPU_REG_A].mMask & data.mRegs[CPU_REG_A].mValue);
data.mRegs[CPU_REG_A].mMask = ones | zeros;
data.mRegs[CPU_REG_A].mValue = ones;
data.mRegs[CPU_REG_A].mMask = (ones | zeros) & 0xff;
data.mRegs[CPU_REG_A].mValue = ones & 0xff;
if (data.mRegs[CPU_REG_A].mMask == 0xff)
{
@ -2130,8 +2130,8 @@ bool NativeCodeInstruction::BitFieldForwarding(NativeRegisterDataSet& data, AsmI
int ones = mAddress & (data.mRegs[CPU_REG_A].mMask & data.mRegs[CPU_REG_A].mValue);
data.mRegs[CPU_REG_A].mMask = ones | zeros;
data.mRegs[CPU_REG_A].mValue = ones;
data.mRegs[CPU_REG_A].mMask = (ones | zeros) & 0xff;
data.mRegs[CPU_REG_A].mValue = ones & 0xff;
if (data.mRegs[CPU_REG_A].mMask == 0xff)
{
@ -2156,8 +2156,8 @@ bool NativeCodeInstruction::BitFieldForwarding(NativeRegisterDataSet& data, AsmI
(data.mRegs[mAddress].mMask & ~data.mRegs[mAddress].mValue) &
(data.mRegs[CPU_REG_A].mMask & ~data.mRegs[CPU_REG_A].mValue);
data.mRegs[CPU_REG_A].mMask = ones | zeros;
data.mRegs[CPU_REG_A].mValue = ones;
data.mRegs[CPU_REG_A].mMask = (ones | zeros) & 0xff;
data.mRegs[CPU_REG_A].mValue = ones & 0xff;
if (data.mRegs[CPU_REG_A].mMask == 0xff)
{
@ -2173,8 +2173,8 @@ bool NativeCodeInstruction::BitFieldForwarding(NativeRegisterDataSet& data, AsmI
int zeros = ~ mAddress & (data.mRegs[CPU_REG_A].mMask & ~data.mRegs[CPU_REG_A].mValue);
data.mRegs[CPU_REG_A].mMask = ones | zeros;
data.mRegs[CPU_REG_A].mValue = ones;
data.mRegs[CPU_REG_A].mMask = (ones | zeros) & 0xff;
data.mRegs[CPU_REG_A].mValue = ones & 0xff;
if (data.mRegs[CPU_REG_A].mMask == 0xff)
{
@ -2303,7 +2303,7 @@ bool NativeCodeInstruction::BitFieldForwarding(NativeRegisterDataSet& data, AsmI
{
int mask = data.mRegs[iaddr].mMask, value = data.mRegs[iaddr].mValue;
data.mRegs[iaddr].mMask = (mask >> 1) & 0xff;
data.mRegs[iaddr].mMask = (mask >> 1) & 0x7f;
data.mRegs[iaddr].mValue = (value >> 1) & 0x7f;
if (data.mRegs[CPU_REG_C].mMask & 1)
@ -2334,6 +2334,13 @@ bool NativeCodeInstruction::BitFieldForwarding(NativeRegisterDataSet& data, AsmI
break;
}
#if _DEBUG
for (int i = 0; i < NUM_REGS; i++)
{
assert(!(data.mRegs[i].mMask & 0xff00));
}
#endif
return changed;
}
@ -2510,18 +2517,34 @@ bool NativeCodeInstruction::ValueForwarding(NativeRegisterDataSet& data, AsmInsT
break;
case ASMIT_ADC:
if (data.mRegs[CPU_REG_C].mMode == NRDM_IMMEDIATE && data.mRegs[CPU_REG_C].mValue == 0)
if (data.mRegs[CPU_REG_C].mMode == NRDM_IMMEDIATE)
{
if (mMode == ASMIM_IMMEDIATE && mAddress == 0)
if (mMode == ASMIM_IMMEDIATE && mAddress == 0 && data.mRegs[CPU_REG_C].mValue == 0)
{
mType = ASMIT_ORA;
changed = true;
}
else if (data.mRegs[CPU_REG_A].mMode == NRDM_IMMEDIATE && data.mRegs[CPU_REG_A].mValue == 0)
else if (data.mRegs[CPU_REG_A].mMode == NRDM_IMMEDIATE && data.mRegs[CPU_REG_A].mValue == 0 && data.mRegs[CPU_REG_C].mValue == 0)
{
mType = ASMIT_LDA;
changed = true;
}
else if (mMode == ASMIM_IMMEDIATE && data.mRegs[CPU_REG_A].mMode == NRDM_IMMEDIATE)
{
int t = mAddress + data.mRegs[CPU_REG_A].mValue + data.mRegs[CPU_REG_C].mValue;
mType = ASMIT_LDA;
mAddress = t & 0xff;
int c = t >= 256;
if (c && !data.mRegs[CPU_REG_C].mValue)
carryop = ASMIT_SEC;
else if (!c && data.mRegs[CPU_REG_C].mValue)
carryop = ASMIT_CLC;
changed = true;
}
}
data.mRegs[CPU_REG_A].Reset();
@ -2546,9 +2569,9 @@ bool NativeCodeInstruction::ValueForwarding(NativeRegisterDataSet& data, AsmInsT
int c = t >= 256;
if (t && !data.mRegs[CPU_REG_C].mValue)
if (c && !data.mRegs[CPU_REG_C].mValue)
carryop = ASMIT_SEC;
else if (!t && data.mRegs[CPU_REG_C].mValue)
else if (!c && data.mRegs[CPU_REG_C].mValue)
carryop = ASMIT_CLC;
changed = true;
@ -2567,9 +2590,9 @@ bool NativeCodeInstruction::ValueForwarding(NativeRegisterDataSet& data, AsmInsT
int c = t >= 256;
if (t && !data.mRegs[CPU_REG_C].mValue)
if (c && !data.mRegs[CPU_REG_C].mValue)
carryop = ASMIT_SEC;
else if (!t && data.mRegs[CPU_REG_C].mValue)
else if (!c && data.mRegs[CPU_REG_C].mValue)
carryop = ASMIT_CLC;
changed = true;
@ -3205,6 +3228,78 @@ bool NativeCodeInstruction::ValueForwarding(NativeRegisterDataSet& data, AsmInsT
if (ChangesAddress())
data.ResetIndirect(mAddress);
}
else if (mMode == ASMIM_ABSOLUTE_X)
{
if (mType == ASMIT_LDA)
{
if (!(mFlags & NCIF_VOLATILE))
{
if (data.mRegs[CPU_REG_A].mMode == NRDM_ABSOLUTE_X && data.mRegs[CPU_REG_A].mLinkerObject == mLinkerObject && data.mRegs[CPU_REG_A].mValue == mAddress)
{
if (mLive & LIVE_CPU_REG_Z)
{
mType = ASMIT_ORA;
mMode = ASMIM_IMMEDIATE;
mAddress = 0;
}
else
{
mType = ASMIT_NOP;
mMode = ASMIM_IMPLIED;
}
changed = true;
}
else
{
data.mRegs[CPU_REG_A].mMode = NRDM_ABSOLUTE_X;
data.mRegs[CPU_REG_A].mLinkerObject = mLinkerObject;
data.mRegs[CPU_REG_A].mValue = mAddress;
data.mRegs[CPU_REG_A].mFlags = mFlags;
}
}
else
data.mRegs[CPU_REG_A].Reset();
}
if (ChangesAddress())
data.ResetIndirect(mAddress);
}
else if (mMode == ASMIM_ABSOLUTE_Y)
{
if (mType == ASMIT_LDA)
{
if (!(mFlags & NCIF_VOLATILE))
{
if (data.mRegs[CPU_REG_A].mMode == NRDM_ABSOLUTE_Y && data.mRegs[CPU_REG_A].mLinkerObject == mLinkerObject && data.mRegs[CPU_REG_A].mValue == mAddress)
{
if (mLive & LIVE_CPU_REG_Z)
{
mType = ASMIT_ORA;
mMode = ASMIM_IMMEDIATE;
mAddress = 0;
}
else
{
mType = ASMIT_NOP;
mMode = ASMIM_IMPLIED;
}
changed = true;
}
else
{
data.mRegs[CPU_REG_A].mMode = NRDM_ABSOLUTE_Y;
data.mRegs[CPU_REG_A].mLinkerObject = mLinkerObject;
data.mRegs[CPU_REG_A].mValue = mAddress;
data.mRegs[CPU_REG_A].mFlags = mFlags;
}
}
else
data.mRegs[CPU_REG_A].Reset();
}
if (ChangesAddress())
data.ResetIndirect(mAddress);
}
else if (mMode == ASMIM_ABSOLUTE)
{
switch (mType)
@ -3289,11 +3384,6 @@ bool NativeCodeInstruction::ValueForwarding(NativeRegisterDataSet& data, AsmInsT
data.ResetAbsolute(mLinkerObject, mAddress);
}
}
else if (mMode == ASMIM_ABSOLUTE_X || mMode == ASMIM_ABSOLUTE_Y)
{
if (ChangesAddress())
data.ResetAbsolute(mLinkerObject, mAddress);
}
return changed;
}
@ -14399,6 +14489,7 @@ bool NativeCodeBasicBlock::JoinTailCodeSequences(NativeCodeProcedure* proc, bool
mTrueJump->mIns.Insert(0, ins);
mTrueJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(mIns.Size() - 1);
mExitRequiredRegs += CPU_REG_A;
mTrueJump->mEntryRequiredRegs += CPU_REG_A;
mTrueJump->CheckLive();
changed = true;
@ -14408,6 +14499,7 @@ bool NativeCodeBasicBlock::JoinTailCodeSequences(NativeCodeProcedure* proc, bool
mFalseJump->mIns.Insert(0, ins);
mFalseJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(mIns.Size() - 1);
mExitRequiredRegs += CPU_REG_A;
mFalseJump->mEntryRequiredRegs += CPU_REG_A;
mFalseJump->CheckLive();
changed = true;
@ -14420,25 +14512,53 @@ bool NativeCodeBasicBlock::JoinTailCodeSequences(NativeCodeProcedure* proc, bool
int ns = mIns.Size();
const NativeCodeInstruction& ins(mIns[ns - 2]);
if (ins.mType == ASMIT_STA && ins.mMode == ASMIM_ZERO_PAGE && mTrueJump && mFalseJump && !mIns[ns-1].ChangesAccu() && !mIns[ns-1].UsesZeroPage(ins.mAddress) && mTrueJump->mEntryRequiredRegs.Size() && mFalseJump->mEntryRequiredRegs.Size())
if (ins.mType == ASMIT_STA && ins.mMode == ASMIM_ZERO_PAGE && mTrueJump && mFalseJump && !mIns[ns-1].UsesZeroPage(ins.mAddress) && mTrueJump->mEntryRequiredRegs.Size() && mFalseJump->mEntryRequiredRegs.Size())
{
if (mTrueJump->mEntryRequiredRegs[ins.mAddress] && !mFalseJump->mEntryRequiredRegs[ins.mAddress] && mTrueJump->mEntryBlocks.Size() == 1)
if (!mIns[ns - 1].ChangesAccu())
{
mTrueJump->mIns.Insert(0, ins);
mTrueJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(ns - 2);
mTrueJump->mEntryRequiredRegs += CPU_REG_A;
mTrueJump->CheckLive();
changed = true;
if (mTrueJump->mEntryRequiredRegs[ins.mAddress] && !mFalseJump->mEntryRequiredRegs[ins.mAddress] && mTrueJump->mEntryBlocks.Size() == 1)
{
mTrueJump->mIns.Insert(0, ins);
mTrueJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(ns - 2);
mTrueJump->mEntryRequiredRegs += CPU_REG_A;
mTrueJump->CheckLive();
changed = true;
}
else if (mFalseJump->mEntryRequiredRegs[ins.mAddress] && !mTrueJump->mEntryRequiredRegs[ins.mAddress] && mFalseJump->mEntryBlocks.Size() == 1)
{
mFalseJump->mIns.Insert(0, ins);
mFalseJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(ns - 2);
mFalseJump->mEntryRequiredRegs += CPU_REG_A;
mFalseJump->CheckLive();
changed = true;
}
}
else if (mFalseJump->mEntryRequiredRegs[ins.mAddress] && !mTrueJump->mEntryRequiredRegs[ins.mAddress] && mFalseJump->mEntryBlocks.Size() == 1)
else if (ns >= 3 && mIns[ns - 3].mType == ASMIT_LDA && mIns[ns - 3].mMode == ASMIM_ZERO_PAGE && !(mIns[ns - 2].mLive & LIVE_CPU_REG_X))
{
mFalseJump->mIns.Insert(0, ins);
mFalseJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(ns - 2);
mFalseJump->mEntryRequiredRegs += CPU_REG_A;
mFalseJump->CheckLive();
changed = true;
if (mTrueJump->mEntryRequiredRegs[ins.mAddress] && !mFalseJump->mEntryRequiredRegs[ins.mAddress] && mTrueJump->mEntryBlocks.Size() == 1)
{
mIns[ns - 3].mType = ASMIT_LDX; mIns[ns - 3].mLive |= LIVE_CPU_REG_X;
mIns[ns - 2].mType = ASMIT_STX;
mTrueJump->mIns.Insert(0, ins);
mTrueJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(ns - 2);
mTrueJump->mEntryRequiredRegs += CPU_REG_X;
mTrueJump->CheckLive();
changed = true;
}
else if (mFalseJump->mEntryRequiredRegs[ins.mAddress] && !mTrueJump->mEntryRequiredRegs[ins.mAddress] && mFalseJump->mEntryBlocks.Size() == 1)
{
mIns[ns - 3].mType = ASMIT_LDX; mIns[ns - 3].mLive |= LIVE_CPU_REG_X;
mIns[ns - 2].mType = ASMIT_STX;
mFalseJump->mIns.Insert(0, ins);
mFalseJump->mIns[0].mLive |= LIVE_CPU_REG_C;
mIns.Remove(ns - 2);
mFalseJump->mEntryRequiredRegs += CPU_REG_X;
mFalseJump->CheckLive();
changed = true;
}
}
}
}
@ -24000,6 +24120,16 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
mIns[i + 2].mMode = ASMIM_ABSOLUTE_X;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_LDA && !(mIns[i + 0].mFlags & NCIF_VOLATILE) &&
mIns[i + 1].mType == ASMIT_STA && !mIns[i + 0].MayBeChangedOnAddress(mIns[i + 1], true) &&
mIns[i + 2].mType == ASMIT_LDA && mIns[i + 2].SameEffectiveAddress(mIns[i + 0]) && !(mIns[i + 2].mFlags & NCIF_VOLATILE))
{
mIns[i + 0].mLive |= mIns[i + 2].mLive;
mIns[i + 1].mLive |= mIns[i + 2].mLive;
mIns[i + 2].mType = ASMIT_NOP; mIns[i + 2].mMode = ASMIM_IMPLIED;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_LDA && HasAsmInstructionMode(ASMIT_LDX, mIns[i + 0].mMode) &&
mIns[i + 1].mType == ASMIT_STA && HasAsmInstructionMode(ASMIT_STX, mIns[i + 1].mMode) &&
@ -27565,7 +27695,6 @@ void NativeCodeProcedure::Optimize(void)
ResetVisited();
bchanged = mEntryBlock->BitFieldForwarding(data);
} while (bchanged);
}
#endif
@ -27582,6 +27711,7 @@ void NativeCodeProcedure::Optimize(void)
mEntryBlock->ReplaceFinalZeroPageUse(this);
}
#endif
#if 1
do
{
@ -27891,10 +28021,10 @@ void NativeCodeProcedure::Optimize(void)
{
step++;
changed = true;
}
#endif
cnt++;
} while (changed);