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backend/x64: Touch PEXT/PDEP code

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* Use pext/pdep where not previously used
* Limit pext/pdep to non-AMD platforms due to slowness on AMD
* Use imul/and as alternatives for AMD and non-BMI2 platforms
This commit is contained in:
MerryMage 2020-06-09 22:28:28 +01:00
parent f495018f53
commit 55bddc767f
5 changed files with 125 additions and 62 deletions
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4
src/backend/x64/block_of_code.cpp
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@ -355,6 +355,10 @@ bool BlockOfCode::HasBMI2() const {
return DoesCpuSupport(Xbyak::util::Cpu::tBMI2);
}
bool BlockOfCode::HasFastBMI2() const {
return DoesCpuSupport(Xbyak::util::Cpu::tBMI2) && !DoesCpuSupport(Xbyak::util::Cpu::tAMD);
}
bool BlockOfCode::HasFMA() const {
return DoesCpuSupport(Xbyak::util::Cpu::tFMA);
}