diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/multiarch/s_fma.c')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/s_fma.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/s_fma.c b/sysdeps/x86_64/fpu/multiarch/s_fma.c index 9a680c68fc..06f2d001d9 100644 --- a/sysdeps/x86_64/fpu/multiarch/s_fma.c +++ b/sysdeps/x86_64/fpu/multiarch/s_fma.c @@ -1,5 +1,5 @@ /* FMA version of fma. - Copyright (C) 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. Contributed by Intel Corporation. This file is part of the GNU C Library. @@ -28,13 +28,29 @@ extern double __fma_sse2 (double x, double y, double z) attribute_hidden; static double -__fma_fma (double x, double y, double z) +__fma_fma3 (double x, double y, double z) { asm ("vfmadd213sd %3, %2, %0" : "=x" (x) : "0" (x), "x" (y), "xm" (z)); return x; } -libm_ifunc (__fma, HAS_FMA ? __fma_fma : __fma_sse2); + +# ifdef HAVE_FMA4_SUPPORT +static double +__fma_fma4 (double x, double y, double z) +{ + asm ("vfmaddsd %3, %2, %1, %0" : "=x" (x) : "x" (x), "xm" (y), "xm" (z)); + return x; +} +# else +# undef HAS_FMA4 +# define HAS_FMA4 0 +# define __fma_fma4 NULL +# endif + + +libm_ifunc (__fma, HAS_FMA + ? __fma_fma3 : (HAS_FMA4 ? __fma_fma4 : __fma_sse2)); weak_alias (__fma, fma) # define __fma __fma_sse2 |