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JitArm64: Optimize ANDI2R and friends to no-ops when possible 

This optimizes rlwnmx with mask == 0xFFFFFFFF.
This commit is contained in:
JosJuice 2023-12-17 17:15:03 +01:00
parent e6c85bf8f0
commit 6303416201
1 changed files with 15 additions and 3 deletions
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18
Source/Core/Common/Arm64Emitter.cpp
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@ -4041,7 +4041,11 @@ void ARM64XEmitter::ANDI2R(ARM64Reg Rd, ARM64Reg Rn, u64 imm, ARM64Reg scratch)
if (!Is64Bit(Rn))
imm &= 0xFFFFFFFF;
if (const auto result = LogicalImm(imm, Is64Bit(Rn) ? GPRSize::B64 : GPRSize::B32))
if (imm != (Is64Bit(Rn) ? 0xFFFF'FFFF'FFFF'FFFF : 0xFFFF'FFFF))
{
// Do nothing
}
else if (const auto result = LogicalImm(imm, Is64Bit(Rn) ? GPRSize::B64 : GPRSize::B32))
{
AND(Rd, Rn, result);
}
@ -4057,7 +4061,11 @@ void ARM64XEmitter::ANDI2R(ARM64Reg Rd, ARM64Reg Rn, u64 imm, ARM64Reg scratch)
void ARM64XEmitter::ORRI2R(ARM64Reg Rd, ARM64Reg Rn, u64 imm, ARM64Reg scratch)
{
if (const auto result = LogicalImm(imm, Is64Bit(Rn) ? GPRSize::B64 : GPRSize::B32))
if (imm == 0)
{
// Do nothing
}
else if (const auto result = LogicalImm(imm, Is64Bit(Rn) ? GPRSize::B64 : GPRSize::B32))
{
ORR(Rd, Rn, result);
}
@ -4073,7 +4081,11 @@ void ARM64XEmitter::ORRI2R(ARM64Reg Rd, ARM64Reg Rn, u64 imm, ARM64Reg scratch)
void ARM64XEmitter::EORI2R(ARM64Reg Rd, ARM64Reg Rn, u64 imm, ARM64Reg scratch)
{
if (const auto result = LogicalImm(imm, Is64Bit(Rn) ? GPRSize::B64 : GPRSize::B32))
if (imm == 0)
{
// Do nothing
}
else if (const auto result = LogicalImm(imm, Is64Bit(Rn) ? GPRSize::B64 : GPRSize::B32))
{
EOR(Rd, Rn, result);
}