diff options
| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-20 22:43:15 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-20 22:43:15 -0400 |
| commit | ed72b6545f6d20f2d29ed71d65394d4a75ad358e (patch) | |
| tree | e47730c47098dfbf1d41d95210009fd4a5fc0e5c /sysdeps/x86_64/fpu/multiarch/s_fmaf.c | |
| parent | 8d4f46c613c4397c5531b959744541862cf09ad0 (diff) | |
| download | glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.tar.gz glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.tar.xz glibc-ed72b6545f6d20f2d29ed71d65394d4a75ad358e.zip | |
Check for FMA4 support and generate appropriate fma functions
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/s_fmaf.c')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/s_fmaf.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/s_fmaf.c b/sysdeps/x86_64/fpu/multiarch/s_fmaf.c index 85ef65a50e..53c08de47c 100644 --- a/sysdeps/x86_64/fpu/multiarch/s_fmaf.c +++ b/sysdeps/x86_64/fpu/multiarch/s_fmaf.c @@ -1,5 +1,5 @@ /* FMA version of fmaf. - Copyright (C) 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -27,13 +27,29 @@ extern float __fmaf_sse2 (float x, float y, float z) attribute_hidden; static float -__fmaf_fma (float x, float y, float z) +__fmaf_fma3 (float x, float y, float z) { asm ("vfmadd213ss %3, %2, %0" : "=x" (x) : "0" (x), "x" (y), "xm" (z)); return x; } -libm_ifunc (__fmaf, HAS_FMA ? __fmaf_fma : __fmaf_sse2); + +# ifdef HAVE_FMA4_SUPPORT +static float +__fmaf_fma4 (float x, float y, float z) +{ + asm ("vfmaddss %3, %2, %1, %0" : "=x" (x) : "x" (x), "xm" (y), "xm" (z)); + return x; +} +# else +# undef HAS_FMA4 +# define HAS_FMA4 0 +# define __fmaf_fma4 NULL +# endif + + +libm_ifunc (__fmaf, HAS_FMA + ? __fmaf_fma3 : (HAS_FMA4 ? __fmaf_fma4 : __fmaf_sse2)); weak_alias (__fmaf, fmaf) # define __fmaf __fmaf_sse2 |