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| author | H.J. Lu <hjl.tools@gmail.com> | 2015-08-18 07:59:49 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-08-18 08:00:00 -0700 |
| commit | 1814df5b02b9c359052c2048a1d2d617b406a17a (patch) | |
| tree | 30f5786d3e53d6043ecaab75bdb71cddf6567368 /sysdeps/x86/cpu-features.c | |
| parent | 441c3b59d1e2fca4ad40cf53d03d6196c978e85f (diff) | |
| download | glibc-1814df5b02b9c359052c2048a1d2d617b406a17a.tar.gz glibc-1814df5b02b9c359052c2048a1d2d617b406a17a.tar.xz glibc-1814df5b02b9c359052c2048a1d2d617b406a17a.zip | |
Define HAS_CPUID/HAS_I586/HAS_I686 from -march=
cpuid, i586 and i686 instructions are available if the processor specified by -march= supports them. We can use this information to determine whether those instructions can be used safely. * sysdeps/x86/cpu-features.c (init_cpu_features): Check whether cpuid is available only if HAS_CPUID is 0. * sysdeps/x86/cpu-features.h (HAS_CPUID): New. (HAS_I586): Likewise. (HAS_I686): Likewise.
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index 582a8f5f79..40575de611 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -40,7 +40,7 @@ init_cpu_features (struct cpu_features *cpu_features) unsigned int model = 0; enum cpu_features_kind kind; -#if !defined __i586__ && !defined __i686__ && !defined __x86_64__ +#if !HAS_CPUID if (__get_cpuid_max (0, 0) == 0) { kind = arch_kind_other; @@ -204,7 +204,7 @@ init_cpu_features (struct cpu_features *cpu_features) } } -#if !defined __i586__ && !defined __i686__ && !defined __x86_64__ +#if !HAS_CPUID no_cpuid: #endif |