x86-64: Add cosf with FMA
On Skylake, bench-cosf reports performance improvement: Before After Improvement max 135.362 94.552 43% min 8.532 7.688 11% mean 17.1446 11.8128 45% * sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines): Add s_cosf-sse2 and s_cosf-fma. (CFLAGS-s_cosf-fma.c): New. * sysdeps/x86_64/fpu/multiarch/s_cosf-fma.c: New file. * sysdeps/x86_64/fpu/multiarch/s_cosf-sse2.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_cosf.c: Likewise. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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@ -1,3 +1,12 @@
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2017-12-12 H.J. Lu <hongjiu.lu@intel.com>
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* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
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Add s_cosf-sse2 and s_cosf-fma.
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(CFLAGS-s_cosf-fma.c): New.
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* sysdeps/x86_64/fpu/multiarch/s_cosf-fma.c: New file.
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* sysdeps/x86_64/fpu/multiarch/s_cosf-sse2.c: Likewise.
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* sysdeps/x86_64/fpu/multiarch/s_cosf.c: Likewise.
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2017-12-12 Steve Ellcey <sellcey@cavium.com>
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2017-12-12 Steve Ellcey <sellcey@cavium.com>
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* nscd/nscd.h (init_traced_file): Change strncpy to memcpy.
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* nscd/nscd.h (init_traced_file): Change strncpy to memcpy.
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5
NEWS
5
NEWS
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@ -9,8 +9,9 @@ Version 2.27
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Major new features:
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Major new features:
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* Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, sinf and
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* Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
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tan with FMA, contributed by Arjan van de Ven and H.J. Lu from Intel.
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sinf and tan with FMA, contributed by Arjan van de Ven and H.J. Lu
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from Intel.
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* Optimized x86-64 trunc and truncf for processors with SSE4.1.
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* Optimized x86-64 trunc and truncf for processors with SSE4.1.
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@ -37,10 +37,10 @@ CFLAGS-slowpow-fma.c = -mfma -mavx2
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CFLAGS-s_sin-fma.c = -mfma -mavx2
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CFLAGS-s_sin-fma.c = -mfma -mavx2
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CFLAGS-s_tan-fma.c = -mfma -mavx2
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CFLAGS-s_tan-fma.c = -mfma -mavx2
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libm-sysdep_routines += s_sinf-sse2
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libm-sysdep_routines += s_sinf-sse2 s_cosf-sse2
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libm-sysdep_routines += e_exp2f-fma e_expf-fma e_log2f-fma e_logf-fma \
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libm-sysdep_routines += e_exp2f-fma e_expf-fma e_log2f-fma e_logf-fma \
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e_powf-fma s_sinf-fma
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e_powf-fma s_sinf-fma s_cosf-fma
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CFLAGS-e_exp2f-fma.c = -mfma -mavx2
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CFLAGS-e_exp2f-fma.c = -mfma -mavx2
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CFLAGS-e_expf-fma.c = -mfma -mavx2
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CFLAGS-e_expf-fma.c = -mfma -mavx2
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@ -48,6 +48,7 @@ CFLAGS-e_log2f-fma.c = -mfma -mavx2
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CFLAGS-e_logf-fma.c = -mfma -mavx2
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CFLAGS-e_logf-fma.c = -mfma -mavx2
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CFLAGS-e_powf-fma.c = -mfma -mavx2
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CFLAGS-e_powf-fma.c = -mfma -mavx2
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CFLAGS-s_sinf-fma.c = -mfma -mavx2
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CFLAGS-s_sinf-fma.c = -mfma -mavx2
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CFLAGS-s_cosf-fma.c = -mfma -mavx2
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libm-sysdep_routines += e_exp-fma4 e_log-fma4 e_pow-fma4 s_atan-fma4 \
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libm-sysdep_routines += e_exp-fma4 e_log-fma4 e_pow-fma4 s_atan-fma4 \
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e_asin-fma4 e_atan2-fma4 s_sin-fma4 s_tan-fma4 \
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e_asin-fma4 e_atan2-fma4 s_sin-fma4 s_tan-fma4 \
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#define COSF __cosf_fma
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#include <sysdeps/ieee754/flt-32/s_cosf.c>
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#define COSF __cosf_sse2
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#include <sysdeps/ieee754/flt-32/s_cosf.c>
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/* Multiple versions of cosf.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <libm-alias-float.h>
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extern float __redirect_cosf (float);
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#define SYMBOL_NAME cosf
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#include "ifunc-fma.h"
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libc_ifunc_redirected (__redirect_cosf, __cosf, IFUNC_SELECTOR ());
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libm_alias_float (__cos, cos)
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