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Merge pull request #3084 from Sonicadvance1/optimize_bswap

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OpcodeDispatcher: Optimize 32-bit bswap
This commit is contained in:
Mai authored and GitHub committed 2023-09-12 20:09:00 -04:00
2 parents dda5861bdd 65bc159ff1
commit ebdca02218
2 files changed
+4 -5
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+1 -1
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@@ -4337,7 +4337,7 @@ void OpDispatchBuilder::BSWAPOp(OpcodeArgs) {
Dest = _Constant(0); Dest = _Constant(0);
} }
else { else {
Dest = LoadSource(GPRClass, Op, Op->Dest, Op->Flags, -1); Dest = LoadSource_WithOpSize(GPRClass, Op, Op->Dest, CTX->GetGPRSize(), Op->Flags, -1);
Dest = _Rev(IR::SizeToOpSize(Size), Dest); Dest = _Rev(IR::SizeToOpSize(Size), Dest);
} }
StoreResult(GPRClass, Op, Dest, -1); StoreResult(GPRClass, Op, Dest, -1);
unittests/InstructionCountCI/Secondary.json
+3 -4
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@@ -3705,12 +3705,11 @@
] ]
}, },
"bswap eax": { "bswap eax": {
"ExpectedInstructionCount": 2, "ExpectedInstructionCount": 1,
"Optimal": "No", "Optimal": "Yes",
"Comment": "0x0f 0xc8", "Comment": "0x0f 0xc8",
"ExpectedArm64ASM": [ "ExpectedArm64ASM": [
"lsr w20, w4, #0", "rev w4, w4"
"rev w4, w20"
] ]
}, },
"bswap rax": { "bswap rax": {