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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 /string | |
| 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.
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