On 8/16/2021 6:27 AM, Wu, Jianhua wrote:

Yes, but we don't want to use AVX512 on hardware that downclocks heavily.


It's okay. Should I updated the configure file to let the IceLake-AVX512 to be 
the minimum baseline or add a new macro name AVX512ICL?

Update the test in configure to look for an instruction available on Ice Lake (like VL), then update the check in cpu.c to make sure AVX2 is only enabled if AVX2-related flags Ice Lake and newer CPUs have in common are signaled.


Jianhua

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