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JitArm64: Constant carry flag optimizations

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If we know at compile time that the PPC carry flag definitely
has a certain value, we can bake that value into the emitted code
and skip having to read from PPCState.
This commit is contained in:
JosJuice
2021-03-14 12:51:00 +01:00
parent a45a0a2066
commit 4c2cdb61df
7 changed files with 266 additions and 107 deletions
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1
Source/Core/Common/Arm64Emitter.h
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@ -673,6 +673,7 @@ public:
CSINV(Rd, zr, zr, (CCFlags)((u32)cond ^ 1));
}
void NEG(ARM64Reg Rd, ARM64Reg Rs) { SUB(Rd, Is64Bit(Rd) ? ARM64Reg::ZR : ARM64Reg::WZR, Rs); }
void NEGS(ARM64Reg Rd, ARM64Reg Rs) { SUBS(Rd, Is64Bit(Rd) ? ARM64Reg::ZR : ARM64Reg::WZR, Rs); }
// Data-Processing 1 source
void RBIT(ARM64Reg Rd, ARM64Reg Rn);
void REV16(ARM64Reg Rd, ARM64Reg Rn);