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PPCRec: Dead code elimination + reintroduce pre-rework optimizations

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This commit is contained in:
Exzap 2024-01-13 17:13:53 +01:00
parent c419bfc451
commit f55b842773
11 changed files with 930 additions and 316 deletions
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20
src/Cafe/HW/Espresso/Recompiler/IML/IMLInstruction.cpp
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@ -26,7 +26,8 @@ void IMLInstruction::CheckRegisterUsage(IMLUsedRegisters* registersUsed) const
}
else if (type == PPCREC_IML_TYPE_R_R)
{
if (operation == PPCREC_IML_OP_DCBZ)
if (operation == PPCREC_IML_OP_DCBZ ||
operation == PPCREC_IML_OP_X86_CMP)
{
// both operands are read only
registersUsed->readGPR1 = op_r_r.regR;
@ -58,13 +59,18 @@ void IMLInstruction::CheckRegisterUsage(IMLUsedRegisters* registersUsed) const
if (operation == PPCREC_IML_OP_LEFT_ROTATE)
{
// operand register is read and write
// register operand is read and write
registersUsed->readGPR1 = op_r_immS32.regR;
registersUsed->writtenGPR1 = op_r_immS32.regR;
}
else if (operation == PPCREC_IML_OP_X86_CMP)
{
// register operand is read only
registersUsed->readGPR1 = op_r_immS32.regR;
}
else
{
// operand register is write only
// register operand is write only
// todo - use explicit lists, avoid default cases
registersUsed->writtenGPR1 = op_r_immS32.regR;
}
@ -453,6 +459,10 @@ void IMLInstruction::CheckRegisterUsage(IMLUsedRegisters* registersUsed) const
registersUsed->readFPR1 = op_fpr_compare.regA;
registersUsed->readFPR2 = op_fpr_compare.regB;
}
else if (type == PPCREC_IML_TYPE_X86_EFLAGS_JCC)
{
// no registers read or written (except for the implicit eflags)
}
else
{
cemu_assert_unimplemented();
@ -675,6 +685,10 @@ void IMLInstruction::RewriteGPR(const std::unordered_map<IMLRegID, IMLRegID>& tr
op_fpr_compare.regB = replaceRegisterIdMultiple(op_fpr_compare.regB, translationTable);
op_fpr_compare.regR = replaceRegisterIdMultiple(op_fpr_compare.regR, translationTable);
}
else if (type == PPCREC_IML_TYPE_X86_EFLAGS_JCC)
{
// no registers read or written (except for the implicit eflags)
}
else
{
cemu_assert_unimplemented();