diff options
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index f30918dd3b..b481f50e75 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -18,6 +18,7 @@ #include <cpuid.h> #include <cpu-features.h> +#include <dl-hwcap.h> static void get_common_indeces (struct cpu_features *cpu_features, @@ -310,4 +311,51 @@ no_cpuid: cpu_features->family = family; cpu_features->model = model; cpu_features->kind = kind; + +#if IS_IN (rtld) + /* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. */ + GLRO(dl_platform) = NULL; + GLRO(dl_hwcap) = 0; + GLRO(dl_hwcap_mask) = HWCAP_IMPORTANT; + +# ifdef __x86_64__ + if (cpu_features->kind == arch_kind_intel) + { + if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable) + && CPU_FEATURES_CPU_P (cpu_features, AVX512CD)) + { + if (CPU_FEATURES_CPU_P (cpu_features, AVX512ER)) + { + if (CPU_FEATURES_CPU_P (cpu_features, AVX512PF)) + GLRO(dl_platform) = "xeon_phi"; + } + else + { + if (CPU_FEATURES_CPU_P (cpu_features, AVX512BW) + && CPU_FEATURES_CPU_P (cpu_features, AVX512DQ) + && CPU_FEATURES_CPU_P (cpu_features, AVX512VL)) + GLRO(dl_hwcap) |= HWCAP_X86_AVX512_1; + } + } + + if (GLRO(dl_platform) == NULL + && CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, FMA_Usable) + && CPU_FEATURES_CPU_P (cpu_features, BMI1) + && CPU_FEATURES_CPU_P (cpu_features, BMI2) + && CPU_FEATURES_CPU_P (cpu_features, LZCNT) + && CPU_FEATURES_CPU_P (cpu_features, MOVBE) + && CPU_FEATURES_CPU_P (cpu_features, POPCNT)) + GLRO(dl_platform) = "haswell"; + } +# else + if (CPU_FEATURES_CPU_P (cpu_features, SSE2)) + GLRO(dl_hwcap) |= HWCAP_X86_SSE2; + + if (CPU_FEATURES_ARCH_P (cpu_features, I686)) + GLRO(dl_platform) = "i686"; + else if (CPU_FEATURES_ARCH_P (cpu_features, I586)) + GLRO(dl_platform) = "i586"; +# endif +#endif } |