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GNU C Library master sources branch gentoo/2.22 updated. glibc-2.22-46-g2096061
- From: vapier at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 30 Mar 2016 21:13:40 -0000
- Subject: GNU C Library master sources branch gentoo/2.22 updated. glibc-2.22-46-g2096061
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=209606141fb74f9bfa8ad4ca56900077f0cad2b7
commit 209606141fb74f9bfa8ad4ca56900077f0cad2b7
Author: Joseph Myers <joseph@codesourcery.com>
Date: Thu Sep 24 16:48:32 2015 +0000
Fix x86_64 fma4 pow inappropriate contraction (bug 19003).
The x86_64 fma4 version of pow fails to disable contraction of
operations other than those explicitly intended to use fma
instructions, so resulting in large ulps errors on processors with
fma4 instructions, as in bug 18104 (165ulp for the test added for that
bug; error originally reported by "blaaa" on #glibc). This patch adds
$(config-cflags-nofma) for e_pow-fma4.c, corresponding to the use for
e_pow.c in sysdeps/ieee754/dbl-64/Makefile.
Tested for x86_64 on a processor with fma4.
[BZ #19003]
* sysdeps/x86_64/fpu/multiarch/Makefile (CFLAGS-e_pow-fma4.c): Add
$(config-cflags-nofma).
(cherry picked from commit 51df2605064a2bfd44fa0655ef9815812347de80)
(cherry picked from commit c95a56e2a8b16eeb911eed5c1bdc8fd26f337f4d)
diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile
index 86ea473..631534a 100644
--- a/sysdeps/x86_64/fpu/multiarch/Makefile
+++ b/sysdeps/x86_64/fpu/multiarch/Makefile
@@ -16,7 +16,7 @@ CFLAGS-e_asin-fma4.c = -mfma4
CFLAGS-e_atan2-fma4.c = -mfma4
CFLAGS-e_exp-fma4.c = -mfma4
CFLAGS-e_log-fma4.c = -mfma4
-CFLAGS-e_pow-fma4.c = -mfma4
+CFLAGS-e_pow-fma4.c = -mfma4 $(config-cflags-nofma)
CFLAGS-halfulp-fma4.c = -mfma4
CFLAGS-mpa-fma4.c = -mfma4
CFLAGS-mpatan-fma4.c = -mfma4
-----------------------------------------------------------------------
Summary of changes:
sysdeps/x86_64/fpu/multiarch/Makefile | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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