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GNU C Library master sources branch release/2.22/master updated. glibc-2.22-46-gc95a56e
- From: aurel32 at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 8 Mar 2016 16:41:09 -0000
- Subject: GNU C Library master sources branch release/2.22/master updated. glibc-2.22-46-gc95a56e
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=c95a56e2a8b16eeb911eed5c1bdc8fd26f337f4d
commit c95a56e2a8b16eeb911eed5c1bdc8fd26f337f4d
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)
diff --git a/ChangeLog b/ChangeLog
index 602a967..6e42a1e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2015-09-24 Joseph Myers <joseph@codesourcery.com>
+
+ [BZ #19003]
+ * sysdeps/x86_64/fpu/multiarch/Makefile (CFLAGS-e_pow-fma4.c): Add
+ $(config-cflags-nofma).
+
2016-03-07 Hongjiu Zhang <noctuorare@gmail.com>
* elf/sln.c (makesymlink): Change struct stat to stat64, and lstat
diff --git a/NEWS b/NEWS
index 3d52bec..4679258 100644
--- a/NEWS
+++ b/NEWS
@@ -24,8 +24,8 @@ Version 2.22.1
* The following bugs are resolved with this release:
17905, 18420, 18421, 18480, 18589, 18743, 18778, 18781, 18787, 18796,
- 18870, 18887, 18921, 18928, 18969, 18985, 19018, 19058, 19174, 19178,
- 19682.
+ 18870, 18887, 18921, 18928, 18969, 18985, 19003, 19018, 19058, 19174,
+ 19178, 19682.
* The LD_POINTER_GUARD environment variable can no longer be used to
disable the pointer guard feature. It is always enabled.
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:
ChangeLog | 6 ++++++
NEWS | 4 ++--
sysdeps/x86_64/fpu/multiarch/Makefile | 2 +-
3 files changed, 9 insertions(+), 3 deletions(-)
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