diff options
Diffstat (limited to 'lib/builtins/cpu_model.c')
| -rw-r--r-- | lib/builtins/cpu_model.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/builtins/cpu_model.c b/lib/builtins/cpu_model.c index b37fdbacb..cdeb03794 100644 --- a/lib/builtins/cpu_model.c +++ b/lib/builtins/cpu_model.c @@ -121,7 +121,8 @@ enum ProcessorFeatures { FEATURE_GFNI, FEATURE_VPCLMULQDQ, FEATURE_AVX512VNNI, - FEATURE_AVX512BITALG + FEATURE_AVX512BITALG, + FEATURE_AVX512BF16 }; // The check below for i386 was copied from clang's cpuid.h (__get_cpuid_max). @@ -582,6 +583,11 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf, if (HasLeaf7 && ((EDX >> 3) & 1) && HasAVX512Save) setFeature(FEATURE_AVX5124FMAPS); + bool HasLeaf7Subleaf1 = + MaxLeaf >= 0x7 && !getX86CpuIDAndInfoEx(0x7, 0x1, &EAX, &EBX, &ECX, &EDX); + if (HasLeaf7Subleaf1 && ((EAX >> 5) & 1) && HasAVX512Save) + setFeature(FEATURE_AVX512BF16); + unsigned MaxExtLevel; getX86CpuIDAndInfo(0x80000000, &MaxExtLevel, &EBX, &ECX, &EDX); |