diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/init-arch.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.c b/sysdeps/x86_64/multiarch/init-arch.c index 7dec21884d..aaad5fa841 100644 --- a/sysdeps/x86_64/multiarch/init-arch.c +++ b/sysdeps/x86_64/multiarch/init-arch.c @@ -179,6 +179,23 @@ __init_cpu_features (void) if (CPUID_AVX2) __cpu_features.feature[index_AVX2_Usable] |= bit_AVX2_Usable | bit_AVX_Fast_Unaligned_Load; + /* Check if OPMASK state, upper 256-bit of ZMM0-ZMM15 and + ZMM16-ZMM31 state are enabled. */ + if ((xcrlow & (bit_Opmask_state | bit_ZMM0_15_state + | bit_ZMM16_31_state)) == + (bit_Opmask_state | bit_ZMM0_15_state | bit_ZMM16_31_state)) + { + /* Determine if AVX512F is usable. */ + if (CPUID_AVX512F) + { + __cpu_features.feature[index_AVX512F_Usable] + |= bit_AVX512F_Usable; + /* Determine if AVX512DQ is usable. */ + if (CPUID_AVX512DQ) + __cpu_features.feature[index_AVX512DQ_Usable] + |= bit_AVX512DQ_Usable; + } + } /* Determine if FMA is usable. */ if (CPUID_FMA) __cpu_features.feature[index_FMA_Usable] |= bit_FMA_Usable; |