GNU C Library master sources branch master updated. glibc-2.26.9000-627-g0ccc715

[hjl at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc

commit 0ccc7153ccd8fbecefb0793a65cd5a85cdb099fc
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Oct 22 08:03:46 2017 -0700

    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.

diff --git a/ChangeLog b/ChangeLog
index 347bdb7..603cdae 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_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.
+
+2017-10-22  H.J. Lu  <hongjiu.lu@intel.com>
+
 	* sysdeps/i386/fpu/e_logf.S: Removed.
 	* sysdeps/i386/fpu/e_logf_data.c: Likewise.
 	* sysdeps/i386/fpu/w_logf.c: Likewise.
diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile
index 71a3b33..97d886a 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 0000000..a47fd81
--- /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 0000000..6b29473
--- /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>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                          |    8 ++++++++
 sysdeps/x86_64/fpu/multiarch/Makefile              |    3 ++-
 .../fpu/multiarch/e_logf-fma.c}                    |    2 +-
 .../{i386/i686 => x86_64}/fpu/multiarch/e_logf.c   |    6 +++---
 4 files changed, 14 insertions(+), 5 deletions(-)
 copy sysdeps/{i386/i686/fpu/multiarch/e_logf-sse2.c => x86_64/fpu/multiarch/e_logf-fma.c} (61%)
 copy sysdeps/{i386/i686 => x86_64}/fpu/multiarch/e_logf.c (91%)


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