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JitArm64: Port some crXXX optimizations from Jit64

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This commit is contained in:
JosJuice 2024-05-25 16:23:37 +02:00
parent bbe271eec6
commit 7fddd39d97
1 changed files with 36 additions and 11 deletions
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47
Source/Core/Core/PowerPC/JitArm64/JitArm64_SystemRegisters.cpp
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@ -591,18 +591,43 @@ void JitArm64::crXXX(UGeckoInstruction inst)
INSTRUCTION_START
JITDISABLE(bJITSystemRegistersOff);
// Special case: crclr
if (inst.CRBA == inst.CRBB && inst.CRBA == inst.CRBD && inst.SUBOP10 == 193)
if (inst.CRBA == inst.CRBB)
{
ClearCRFieldBit(inst.CRBD >> 2, 3 - (inst.CRBD & 3));
return;
}
// Special case: crset
if (inst.CRBA == inst.CRBB && inst.CRBA == inst.CRBD && inst.SUBOP10 == 289)
{
SetCRFieldBit(inst.CRBD >> 2, 3 - (inst.CRBD & 3));
return;
switch (inst.SUBOP10)
{
// crclr
case 129: // crandc: A && ~B => 0
case 193: // crxor: A ^ B => 0
{
ClearCRFieldBit(inst.CRBD >> 2, 3 - (inst.CRBD & 3));
return;
}
// crset
case 289: // creqv: ~(A ^ B) => 1
case 417: // crorc: A || ~B => 1
{
SetCRFieldBit(inst.CRBD >> 2, 3 - (inst.CRBD & 3));
return;
}
case 257: // crand: A && B => A
case 449: // cror: A || B => A
{
auto WA = gpr.GetScopedReg();
ARM64Reg XA = EncodeRegTo64(WA);
GetCRFieldBit(inst.CRBA >> 2, 3 - (inst.CRBA & 3), XA, false);
SetCRFieldBit(inst.CRBD >> 2, 3 - (inst.CRBD & 3), XA);
return;
}
case 33: // crnor: ~(A || B) => ~A
case 225: // crnand: ~(A && B) => ~A
{
auto WA = gpr.GetScopedReg();
ARM64Reg XA = EncodeRegTo64(WA);
GetCRFieldBit(inst.CRBA >> 2, 3 - (inst.CRBA & 3), XA, true);
SetCRFieldBit(inst.CRBD >> 2, 3 - (inst.CRBD & 3), XA);
return;
}
}
}
auto WA = gpr.GetScopedReg();