diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 07:55:49 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 07:57:50 -0700 |
| commit | 5d15c9697577d2c342b5ade820bfd7b84a736b23 (patch) | |
| tree | d16d35b14e05b635b9dc8d147fbd6c147852d446 /sysdeps/x86_64 | |
| parent | b2f6137ea570933fb4be286574cc58b794eb5b5f (diff) | |
x86-64: Add exp2f with FMA
For workload-spec2017.wrf, on Skylake, it improves performance by:
Before After Improvement
reciprocal-throughput 13.0291 11.2225 16%
latency 44.5154 37.5766 18%
* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
Add e_exp2f-fma.
(CFLAGS-e_exp2f-fma.c): New.
* sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c: New file.
* sysdeps/x86_64/fpu/multiarch/e_exp2f.c: Likewise.
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/Makefile | 3 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c | 3 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/e_exp2f.c | 37 |
3 files changed, 42 insertions, 1 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile index 92e91d79af..71a3b337ed 100644 --- a/sysdeps/x86_64/fpu/multiarch/Makefile +++ b/sysdeps/x86_64/fpu/multiarch/Makefile @@ -37,8 +37,9 @@ CFLAGS-slowpow-fma.c = -mfma -mavx2 CFLAGS-s_sin-fma.c = -mfma -mavx2 CFLAGS-s_tan-fma.c = -mfma -mavx2 -libm-sysdep_routines += e_expf-fma +libm-sysdep_routines += e_exp2f-fma e_expf-fma +CFLAGS-e_exp2f-fma.c = -mfma -mavx2 CFLAGS-e_expf-fma.c = -mfma -mavx2 libm-sysdep_routines += e_exp-fma4 e_log-fma4 e_pow-fma4 s_atan-fma4 \ diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c b/sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c new file mode 100644 index 0000000000..c915a50794 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c @@ -0,0 +1,3 @@ +#define __exp2f __exp2f_fma + +#include <sysdeps/ieee754/flt-32/e_exp2f.c> diff --git a/sysdeps/x86_64/fpu/multiarch/e_exp2f.c b/sysdeps/x86_64/fpu/multiarch/e_exp2f.c new file mode 100644 index 0000000000..13cfcf9b8c --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/e_exp2f.c @@ -0,0 +1,37 @@ +/* Multiple versions of exp2f. + Copyright (C) 2017 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, see + <http://www.gnu.org/licenses/>. */ + +extern float __redirect_exp2f (float); + +#define SYMBOL_NAME exp2f +#include "ifunc-fma.h" + +libc_ifunc_redirected (__redirect_exp2f, __exp2f, IFUNC_SELECTOR ()); + +#ifdef SHARED +# include <shlib-compat.h> +versioned_symbol (libm, __exp2f, exp2f, GLIBC_2_27); +#else +weak_alias (__exp2f, exp2f) +#endif + +strong_alias (__exp2f, __ieee754_exp2f) +strong_alias (__exp2f, __exp2f_finite) + +#define __exp2f __exp2f_sse2 +#include <sysdeps/ieee754/flt-32/e_exp2f.c> |