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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:03:46 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:05:15 -0700 |
| commit | 0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc (patch) | |
| tree | e1e3035d3f0048d9b822ce6a4c9128f90ce5e946 /sysdeps/x86_64/fpu | |
| parent | fe596486d694e657413d0d4c5a04598674ff71b1 (diff) | |
| download | glibc-0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc.tar.gz glibc-0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc.tar.xz glibc-0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc.zip | |
x86-64: Add logf with FMA
For workload-spec2017.wrf, on Skylake, it improves performance by:
Before After Improvement
reciprocal-throughput 16.1534 13.8874 16%
latency 41.9642 34.3072 22%
* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
Add e_logf-fma.
(CFLAGS-e_logf-fma.c): New.
* sysdeps/x86_64/fpu/multiarch/e_logf-fma.c: New file.
* sysdeps/x86_64/fpu/multiarch/e_logf.c: Likewise.
Diffstat (limited to 'sysdeps/x86_64/fpu')
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/Makefile | 3 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/e_logf-fma.c | 3 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/multiarch/e_logf.c | 40 |
3 files changed, 45 insertions, 1 deletions
diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile index 71a3b337ed..97d886aa59 100644 --- a/sysdeps/x86_64/fpu/multiarch/Makefile +++ b/sysdeps/x86_64/fpu/multiarch/Makefile @@ -37,10 +37,11 @@ CFLAGS-slowpow-fma.c = -mfma -mavx2 CFLAGS-s_sin-fma.c = -mfma -mavx2 CFLAGS-s_tan-fma.c = -mfma -mavx2 -libm-sysdep_routines += e_exp2f-fma e_expf-fma +libm-sysdep_routines += e_exp2f-fma e_expf-fma e_logf-fma CFLAGS-e_exp2f-fma.c = -mfma -mavx2 CFLAGS-e_expf-fma.c = -mfma -mavx2 +CFLAGS-e_logf-fma.c = -mfma -mavx2 libm-sysdep_routines += e_exp-fma4 e_log-fma4 e_pow-fma4 s_atan-fma4 \ e_asin-fma4 e_atan2-fma4 s_sin-fma4 s_tan-fma4 \ diff --git a/sysdeps/x86_64/fpu/multiarch/e_logf-fma.c b/sysdeps/x86_64/fpu/multiarch/e_logf-fma.c new file mode 100644 index 0000000000..a47fd8195f --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/e_logf-fma.c @@ -0,0 +1,3 @@ +#define __logf __logf_fma + +#include <sysdeps/ieee754/flt-32/e_logf.c> diff --git a/sysdeps/x86_64/fpu/multiarch/e_logf.c b/sysdeps/x86_64/fpu/multiarch/e_logf.c new file mode 100644 index 0000000000..6b29473f4c --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/e_logf.c @@ -0,0 +1,40 @@ +/* Multiple versions of logf. + 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_logf (float); + +#define SYMBOL_NAME logf +#include "ifunc-fma.h" + +libc_ifunc_redirected (__redirect_logf, __logf, IFUNC_SELECTOR ()); + +#ifdef SHARED +__hidden_ver1 (__logf, __GI___logf, __redirect_logf) + __attribute__ ((visibility ("hidden"))); + +# include <shlib-compat.h> +versioned_symbol (libm, __logf, logf, GLIBC_2_27); +#else +weak_alias (__logf, logf) +#endif + +strong_alias (__logf, __ieee754_logf) +strong_alias (__logf, __logf_finite) + +#define __logf __logf_sse2 +#include <sysdeps/ieee754/flt-32/e_logf.c> |