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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-20 22:43:15 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-20 22:43:15 -0400 |
| commit | ed72b6545f6d20f2d29ed71d65394d4a75ad358e (patch) | |
| tree | e47730c47098dfbf1d41d95210009fd4a5fc0e5c /sysdeps/x86_64/multiarch | |
| parent | 8d4f46c613c4397c5531b959744541862cf09ad0 (diff) | |
| download | glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.tar.gz glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.tar.xz glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.zip | |
Check for FMA4 support and generate appropriate fma functions
Diffstat (limited to 'sysdeps/x86_64/multiarch')
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.c | 10 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.h | 2 |
2 files changed, 11 insertions, 1 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.c b/sysdeps/x86_64/multiarch/init-arch.c index 0a145ca259..3fde5d94ce 100644 --- a/sysdeps/x86_64/multiarch/init-arch.c +++ b/sysdeps/x86_64/multiarch/init-arch.c @@ -86,7 +86,7 @@ __init_cpu_features (void) default: /* Unknown family 0x06 processors. Assuming this is one - of Core i3/i5/i7 processors if AVX is available. */ + of Core i3/i5/i7 processors if AVX is available. */ if ((ecx & bit_AVX) == 0) break; @@ -131,6 +131,14 @@ __init_cpu_features (void) if ((ecx & 0x200)) __cpu_features.feature[index_Prefer_SSE_for_memop] |= bit_Prefer_SSE_for_memop; + + __cpuid (0x80000000, eax, ebx, ecx, edx); + if (eax >= 0x80000001) + __cpuid (0x80000001, + __cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].eax, + __cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].ebx, + __cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].ecx, + __cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].edx); } else kind = arch_kind_other; diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h index e8d48c2456..2fb6f75b66 100644 --- a/sysdeps/x86_64/multiarch/init-arch.h +++ b/sysdeps/x86_64/multiarch/init-arch.h @@ -53,6 +53,7 @@ enum { COMMON_CPUID_INDEX_1 = 0, + COMMON_CPUID_INDEX_80000001, /* for AMD */ /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; @@ -113,6 +114,7 @@ extern const struct cpu_features *__get_cpu_features (void) # define HAS_SSE4_1 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 19) # define HAS_SSE4_2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 20) # define HAS_FMA HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 12) +# define HAS_FMA4 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_80000001, ecx, 16) # define index_Fast_Rep_String FEATURE_INDEX_1 # define index_Fast_Copy_Backward FEATURE_INDEX_1 |