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| author | Ulrich Drepper <drepper@gmail.com> | 2011-12-23 09:18:02 -0500 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-12-23 09:18:02 -0500 |
| commit | 70c6c246a2758fcdc63536d2c7855a80e58613c6 (patch) | |
| tree | 6858a081ceb6020a96bed8b98472bc170f0143ba | |
| parent | c044cf14b0238b6e866f4ef5f8907d6680230212 (diff) | |
| download | glibc-70c6c246a2758fcdc63536d2c7855a80e58613c6.zip glibc-70c6c246a2758fcdc63536d2c7855a80e58613c6.tar.gz glibc-70c6c246a2758fcdc63536d2c7855a80e58613c6.tar.bz2 | |
Optimize x86-32 feraiseexcept also for !__SSE_MATH__
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/bits/fenv.h | 12 |
2 files changed, 16 insertions, 1 deletions
@@ -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 diff --git a/sysdeps/i386/fpu/bits/fenv.h b/sysdeps/i386/fpu/bits/fenv.h index e11e83f..8c00771 100644 --- a/sysdeps/i386/fpu/bits/fenv.h +++ b/sysdeps/i386/fpu/bits/fenv.h @@ -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; } |