From 78c4ef475d47a2289635f74b726f52defedb4651 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 29 Jul 2009 15:26:06 -0700 Subject: Add support for x86-64 fma instruction. Use it to implement fma and fmaf, if possible. --- sysdeps/x86_64/multiarch/Versions | 5 +++++ sysdeps/x86_64/multiarch/s_fma.c | 43 +++++++++++++++++++++++++++++++++++++++ sysdeps/x86_64/multiarch/s_fmaf.c | 42 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+) create mode 100644 sysdeps/x86_64/multiarch/Versions create mode 100644 sysdeps/x86_64/multiarch/s_fma.c create mode 100644 sysdeps/x86_64/multiarch/s_fmaf.c (limited to 'sysdeps') diff --git a/sysdeps/x86_64/multiarch/Versions b/sysdeps/x86_64/multiarch/Versions new file mode 100644 index 0000000000..59b185ac8d --- /dev/null +++ b/sysdeps/x86_64/multiarch/Versions @@ -0,0 +1,5 @@ +libc { + GLIBC_PRIVATE { + __get_cpu_features; + } +} diff --git a/sysdeps/x86_64/multiarch/s_fma.c b/sysdeps/x86_64/multiarch/s_fma.c new file mode 100644 index 0000000000..40601e9a68 --- /dev/null +++ b/sysdeps/x86_64/multiarch/s_fma.c @@ -0,0 +1,43 @@ +/* FMA version of fma. + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Intel Corporation. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include + +#ifdef HAVE_AVX_SUPPORT + +extern double __fma_sse2 (double x, double y, double z); + + +double +__fma_fma (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); +weak_alias (__fma, fma) + +# define __fma __fma_sse2 +#endif + +#include diff --git a/sysdeps/x86_64/multiarch/s_fmaf.c b/sysdeps/x86_64/multiarch/s_fmaf.c new file mode 100644 index 0000000000..f3d37f8f4a --- /dev/null +++ b/sysdeps/x86_64/multiarch/s_fmaf.c @@ -0,0 +1,42 @@ +/* FMA version of fmaf. + Copyright (C) 2009 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include + +#ifdef HAVE_AVX_SUPPORT + +extern float __fmaf_sse2 (float x, float y, float z); + + +float +__fmaf_fma (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); +weak_alias (__fmaf, fmaf) + +# define __fmaf __fmaf_sse2 +#endif + +#include -- cgit v1.2.3