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Add xcr0 (os support) check

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Martin Kroeker 2019-01-05 18:07:14 +01:00 committed by GitHub
parent 0afaae4b23
commit 68eb3146ce
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1 changed files with 2 additions and 0 deletions
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cpuid_x86.c
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@ -239,6 +239,8 @@ int support_avx512(){
ret=0; //OS does not even support AVX2 ret=0; //OS does not even support AVX2
} }
if((ebx & (1<<31)) != 0){ if((ebx & (1<<31)) != 0){
xgetbv(0, &eax, &edx);
if((eax & 0xe0) == 0xe0)
ret=1; //OS supports AVX512VL ret=1; //OS supports AVX512VL
} }
return ret; return ret;