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Optimize x86-32 feraiseexcept also for !__SSE_MATH__

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Ulrich Drepper 2011-12-23 09:18:02 -05:00
parent c044cf14b0
commit 70c6c246a2
2 changed files with 16 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2011-12-23 Ulrich Drepper <drepper@gmail.com>
* sysdeps/i386/fpu/bits/fenv.h (feraiseexcept): Also enable for
!__SSE_MATH__.
2011-12-23 Liubov Dmitrieva <liubov.dmitrieva@gmail.com>
* sysdeps/i386/i686/multiarch/wcscpy-ssse3.S: Fix wrong copying

12
sysdeps/i386/fpu/bits/fenv.h
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@ -90,7 +90,7 @@ fenv_t;
#endif
#if defined __SSE_MATH__ && defined __USE_EXTERN_INLINES
#ifdef __USE_EXTERN_INLINES
__BEGIN_DECLS
/* Optimized versions. */
@ -106,7 +106,12 @@ __NTH (feraiseexcept (int __excepts))
/* One example of a invalid operation is 0.0 / 0.0. */
float __f = 0.0;
# ifdef __SSE_MATH__
__asm__ __volatile__ ("divss %0, %0 " : : "x" (__f));
# else
__asm__ __volatile__ ("fdiv %%st, %%st(0); fwait"
: "=t" (__f) : "0" (__f));
# endif
(void) &__f;
}
if ((FE_DIVBYZERO & __excepts) != 0)
@ -114,7 +119,12 @@ __NTH (feraiseexcept (int __excepts))
float __f = 1.0;
float __g = 0.0;
# ifdef __SSE_MATH__
__asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g));
# else
__asm__ __volatile__ ("fdivp %%st(1), %%st; fwait"
: "=t" (__f) : "0" (__f), "u" (__g) : "st(1)");
# endif
(void) &__f;
}