Displaying 3 results from an estimated 3 matches for "4c209343".
2013 Nov 22
2
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
>> + bool HasAVX2 = HasAVX && !GetX86CpuIDAndInfo(0x7, &EAX, &EBX, &ECX, &EDX) &&
>> + (EBX & 0x20);
>
> I don't think this guarantees %ecx is 0, does it? Wasn't that the
> entire reason the original code went wrong?
I don’t remember really, but presuming the conclusions of the discussion, seems it is fixed now. It
2013 Nov 22
0
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
> I don’t remember really, but presuming the conclusions of the discussion, seems it is fixed now. It was something about registers when using inline assembly. Anyway this works just fine on all my Haswell machines.
I think that's more coincidence than anything else (something
perturbed in your host compiler's backend). If you look at
lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
2013 Nov 23
2
[LLVMdev] [PATCH] Detect Haswell subarchitecture (i.e. using -march=native)
...lopers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
--
~Craig
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