From patchwork Thu Oct 19 17:31:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H.J. Lu" X-Patchwork-Id: 23700 Received: (qmail 80628 invoked by alias); 19 Oct 2017 17:32:06 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 80578 invoked by uid 89); 19 Oct 2017 17:32:06 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-26.1 required=5.0 tests=BAYES_00, FREEMAIL_FROM, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_STOCKGEN, SPF_SOFTFAIL autolearn=ham version=3.3.2 spammy= X-HELO: mga09.intel.com X-ExtLoop1: 1 From: "H.J. Lu" To: libc-alpha@sourceware.org Subject: [PATCH 03/10] x86-64: Add exp2f with FMA Date: Thu, 19 Oct 2017 10:31:52 -0700 Message-Id: <20171019173159.21402-4-hjl.tools@gmail.com> In-Reply-To: <20171019173159.21402-1-hjl.tools@gmail.com> References: <20171019173159.21402-1-hjl.tools@gmail.com> 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. --- sysdeps/x86_64/fpu/multiarch/Makefile | 3 ++- sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c | 3 +++ sysdeps/x86_64/fpu/multiarch/e_exp2f.c | 37 ++++++++++++++++++++++++++++++ 3 files changed, 42 insertions(+), 1 deletion(-) create mode 100644 sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c create mode 100644 sysdeps/x86_64/fpu/multiarch/e_exp2f.c 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 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 + . */ + +extern float __redirect_exp2f (float); + +#define SYMBOL_NAME exp2f +#include "ifunc-fma.h" + +libc_ifunc_redirected (__redirect_exp2f, __exp2f, IFUNC_SELECTOR ()); + +#ifdef SHARED +# include +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