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GNU C Library master sources branch master updated. glibc-2.22-289-g51df260
- From: jsm28 at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 24 Sep 2015 16:50:18 -0000
- Subject: GNU C Library master sources branch master updated. glibc-2.22-289-g51df260
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=51df2605064a2bfd44fa0655ef9815812347de80
commit 51df2605064a2bfd44fa0655ef9815812347de80
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).
diff --git a/ChangeLog b/ChangeLog
index c900f20..df079ca 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).
+
2015-09-24 Szabolcs Nagy <szabolcs.nagy@arm.com>
* sysdeps/aarch64/libm-test-ulps: Regenerated.
diff --git a/NEWS b/NEWS
index bf16f4f..b06a826 100644
--- a/NEWS
+++ b/NEWS
@@ -16,7 +16,7 @@ Version 2.23
18647, 18661, 18674, 18675, 18681, 18757, 18778, 18781, 18787, 18789,
18790, 18795, 18796, 18820, 18823, 18824, 18857, 18863, 18870, 18872,
18873, 18875, 18887, 18921, 18951, 18952, 18961, 18966, 18967, 18970,
- 18977, 18980, 18981.
+ 18977, 18980, 18981, 19003.
* The obsolete header <regexp.h> has been removed. Programs that require
this header must be updated to use <regex.h> instead.
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 | 2 +-
sysdeps/x86_64/fpu/multiarch/Makefile | 2 +-
3 files changed, 8 insertions(+), 2 deletions(-)
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