diff options
Diffstat (limited to 'sysdeps/x86/init-arch.h')
| -rw-r--r-- | sysdeps/x86/init-arch.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sysdeps/x86/init-arch.h b/sysdeps/x86/init-arch.h index 2b9988ebc3..55897fabf2 100644 --- a/sysdeps/x86/init-arch.h +++ b/sysdeps/x86/init-arch.h @@ -20,3 +20,16 @@ #else # include <ldsodefs.h> #endif + +#ifndef __x86_64__ +/* Due to the reordering and the other nifty extensions in i686, it is + not really good to use heavily i586 optimized code on an i686. It's + better to use i486 code if it isn't an i586. */ +# if MINIMUM_ISA == 686 +# define USE_I586 0 +# define USE_I686 1 +# else +# define USE_I586 (HAS_ARCH_FEATURE (I586) && !HAS_ARCH_FEATURE (I686)) +# define USE_I686 HAS_ARCH_FEATURE (I686) +# endif +#endif |