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GNU C Library master sources branch master updated. glibc-2.26.9000-624-g5d15c96
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 22 Oct 2017 14:58:10 -0000
- Subject: GNU C Library master sources branch master updated. glibc-2.26.9000-624-g5d15c96
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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=5d15c9697577d2c342b5ade820bfd7b84a736b23
commit 5d15c9697577d2c342b5ade820bfd7b84a736b23
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Sun Oct 22 07:55:49 2017 -0700
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.
diff --git a/ChangeLog b/ChangeLog
index 5aca573..2fa1ddc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
2017-10-22 H.J. Lu <hongjiu.lu@intel.com>
+ * 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.
+
+2017-10-22 H.J. Lu <hongjiu.lu@intel.com>
+
* sysdeps/i386/fpu/e_exp2f_data.c: Removed.
* sysdeps/i386/fpu/e_expf.S: Likewise.
* sysdeps/i386/fpu/math_errf.c: Likewise.
diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile
index 92e91d7..71a3b33 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 0000000..c915a50
--- /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 0000000..13cfcf9
--- /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>
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 8 +++++
sysdeps/x86_64/fpu/multiarch/Makefile | 3 +-
sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c | 3 ++
.../multiarch/e_exp2f.c} | 28 +++++++++++--------
4 files changed, 29 insertions(+), 13 deletions(-)
create mode 100644 sysdeps/x86_64/fpu/multiarch/e_exp2f-fma.c
copy sysdeps/x86_64/{multiarch/memmove-sse2-unaligned-erms.S => fpu/multiarch/e_exp2f.c} (65%)
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