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* [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures
@ 2014-02-21 20:40 jtaylor.debian at googlemail dot com
2014-02-21 22:30 ` [Bug math/16623] " jsm28 at gcc dot gnu.org
` (16 more replies)
0 siblings, 17 replies; 19+ messages in thread
From: jtaylor.debian at googlemail dot com @ 2014-02-21 20:40 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=16623
Bug ID: 16623
Summary: cos change of behavior in 2.19 causes scipy
testfailures
Product: glibc
Version: 2.19
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: jtaylor.debian at googlemail dot com
CC: drepper.fsp at gmail dot com
#include <math.h>
#include <stdio.h>
int main()
{
double x= 4831921577.4601803;
printf("%.15g\n", sin(x));
printf("%.15g\n", cos(x));
}
in glibc 2.18:
gcc test.c -lm && ./a.out
-0.918193578775631
-0.396131987972694
while 2.19 has the sign of the cosinus has changed:
gcc test.c -lm && ./a.out
-0.918193578775631
0.396131987972694
I can't judge if that is within the allowed accuracy of libc but it is causing
wrong results in funpack used for special functions in python-scipy.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
@ 2014-02-21 22:30 ` jsm28 at gcc dot gnu.org
2014-02-22 2:52 ` bugdal at aerifal dot cx
` (15 subsequent siblings)
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From: jsm28 at gcc dot gnu.org @ 2014-02-21 22:30 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |siddhesh at redhat dot com
Component|libc |math
--- Comment #1 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Siddhesh, you've been doing the most with these functions lately....
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
2014-02-21 22:30 ` [Bug math/16623] " jsm28 at gcc dot gnu.org
@ 2014-02-22 2:52 ` bugdal at aerifal dot cx
2014-02-24 2:34 ` siddhesh at redhat dot com
` (14 subsequent siblings)
16 siblings, 0 replies; 19+ messages in thread
From: bugdal at aerifal dot cx @ 2014-02-22 2:52 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
Rich Felker <bugdal at aerifal dot cx> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bugdal at aerifal dot cx
--- Comment #2 from Rich Felker <bugdal at aerifal dot cx> ---
For the record, the old behavior with the negative sign is correct. Tested
against other libm implementations that handle large trig arguments and Wolfram
Alpha.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
2014-02-21 22:30 ` [Bug math/16623] " jsm28 at gcc dot gnu.org
2014-02-22 2:52 ` bugdal at aerifal dot cx
@ 2014-02-24 2:34 ` siddhesh at redhat dot com
2014-02-27 15:49 ` cvs-commit at gcc dot gnu.org
` (13 subsequent siblings)
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From: siddhesh at redhat dot com @ 2014-02-24 2:34 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
Siddhesh Poyarekar <siddhesh at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at sourceware dot org |siddhesh at redhat dot com
--- Comment #3 from Siddhesh Poyarekar <siddhesh at redhat dot com> ---
Must be due to some of the code consolidation I did recently. I'll take a
look.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (2 preceding siblings ...)
2014-02-24 2:34 ` siddhesh at redhat dot com
@ 2014-02-27 15:49 ` cvs-commit at gcc dot gnu.org
2014-02-27 16:01 ` cvs-commit at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2014-02-27 15:49 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
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The branch, master has been updated
via 1cadc85813d736f7682fa2eeadae639ab6b66c65 (commit)
from f8c17e79fab13a3d1de976c1c3564df7f8c2a175 (commit)
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1cadc85813d736f7682fa2eeadae639ab6b66c65
commit 1cadc85813d736f7682fa2eeadae639ab6b66c65
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Thu Feb 27 21:12:09 2014 +0530
Fix sign of input to bsloww1 (BZ #16623)
In 84ba214c, I removed some redundant sign computations and in the
process, I incorrectly got rid of a temporary variable, thus passing
the absolute value of the input to bsloww1. This caused #16623.
This fix undoes the incorrect change.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 10 +++
NEWS | 2 +-
math/auto-libm-test-in | 2 +
math/auto-libm-test-out | 138 +++++++++++++++++++++++++++++++++++++
sysdeps/ieee754/dbl-64/s_sin.c | 16 +++--
sysdeps/x86_64/fpu/libm-test-ulps | 44 ++++++++++++
6 files changed, 205 insertions(+), 7 deletions(-)
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (3 preceding siblings ...)
2014-02-27 15:49 ` cvs-commit at gcc dot gnu.org
@ 2014-02-27 16:01 ` cvs-commit at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2014-02-27 16:01 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #5 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
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The branch, release/2.19/master has been updated
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from ac0b347743833452b8ff56cb94eab5da95136b70 (commit)
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ffe768a90912f9bce43b70a82576b3dc99e3121c
commit ffe768a90912f9bce43b70a82576b3dc99e3121c
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Thu Feb 27 21:29:16 2014 +0530
Fix sign of input to bsloww1 (BZ #16623)
In 84ba214c, I removed some redundant sign computations and in the
process, I incorrectly got rid of a temporary variable, thus passing
the absolute value of the input to bsloww1. This caused #16623.
This fix undoes the incorrect change.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 7 +++++++
NEWS | 2 +-
sysdeps/ieee754/dbl-64/s_sin.c | 16 ++++++++++------
3 files changed, 18 insertions(+), 7 deletions(-)
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (4 preceding siblings ...)
2014-02-27 16:01 ` cvs-commit at gcc dot gnu.org
@ 2014-02-27 16:05 ` siddhesh at redhat dot com
2014-03-04 18:24 ` jtaylor.debian at googlemail dot com
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From: siddhesh at redhat dot com @ 2014-02-27 16:05 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
Siddhesh Poyarekar <siddhesh at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Siddhesh Poyarekar <siddhesh at redhat dot com> ---
The fix is now in master and the 2.19 branch.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (5 preceding siblings ...)
2014-02-27 16:05 ` siddhesh at redhat dot com
@ 2014-03-04 18:24 ` jtaylor.debian at googlemail dot com
2014-03-14 12:40 ` schwab@linux-m68k.org
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From: jtaylor.debian at googlemail dot com @ 2014-03-04 18:24 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #7 from Julian Taylor <jtaylor.debian at googlemail dot com> ---
confirmed master and 2.19 branch fix the failing application (python scipy),
thanks
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (6 preceding siblings ...)
2014-03-04 18:24 ` jtaylor.debian at googlemail dot com
@ 2014-03-14 12:40 ` schwab@linux-m68k.org
2014-03-14 13:36 ` alduc1 at free dot fr
` (8 subsequent siblings)
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From: schwab@linux-m68k.org @ 2014-03-14 12:40 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alduc1 at free dot fr
--- Comment #8 from Andreas Schwab <schwab@linux-m68k.org> ---
*** Bug 16705 has been marked as a duplicate of this bug. ***
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (7 preceding siblings ...)
2014-03-14 12:40 ` schwab@linux-m68k.org
@ 2014-03-14 13:36 ` alduc1 at free dot fr
2014-03-14 13:57 ` siddhesh at redhat dot com
` (7 subsequent siblings)
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From: alduc1 at free dot fr @ 2014-03-14 13:36 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #9 from alduc1 <alduc1 at free dot fr> ---
(In reply to Andreas Schwab from comment #8)
> *** Bug 16705 has been marked as a duplicate of this bug. ***
Sorry, it is now OK for sin(4831921577.4601803) but it is KO with my test case
:
sin(2*M_PI*0.27*7390843) = -0.63742399 OK
sin(2*M_PI*2.27*7390843) = 0.63742398 KO
cos(2*M_PI*0.27*7390879) = -0.48175367 OK
cos(2*M_PI*2.27*7390879) = 0.48175367 KO
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (8 preceding siblings ...)
2014-03-14 13:36 ` alduc1 at free dot fr
@ 2014-03-14 13:57 ` siddhesh at redhat dot com
2014-03-14 14:15 ` alduc1 at free dot fr
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From: siddhesh at redhat dot com @ 2014-03-14 13:57 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #10 from Siddhesh Poyarekar <siddhesh at redhat dot com> ---
I don't see your incorrect results on master.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (9 preceding siblings ...)
2014-03-14 13:57 ` siddhesh at redhat dot com
@ 2014-03-14 14:15 ` alduc1 at free dot fr
2014-03-14 14:51 ` alduc1 at free dot fr
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From: alduc1 at free dot fr @ 2014-03-14 14:15 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #11 from alduc1 <alduc1 at free dot fr> ---
(In reply to Siddhesh Poyarekar from comment #10)
> I don't see your incorrect results on master.
I tested with sources from
http://www.eglibc.org/cgi-bin/viewvc.cgi/branches/eglibc-2_19/.
Is not it the right way to do ?
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (10 preceding siblings ...)
2014-03-14 14:15 ` alduc1 at free dot fr
@ 2014-03-14 14:51 ` alduc1 at free dot fr
2014-03-14 15:01 ` Ondřej Bílka
2014-03-14 15:02 ` neleai at seznam dot cz
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From: alduc1 at free dot fr @ 2014-03-14 14:51 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #12 from alduc1 <alduc1 at free dot fr> ---
I don't know if eglibc and glibc are the same thing but the fix in s_sin.c of
glibc is not applied to s_sin.c in eglibc 2.19.
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* Re: [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-03-14 14:51 ` alduc1 at free dot fr
@ 2014-03-14 15:01 ` Ondřej Bílka
0 siblings, 0 replies; 19+ messages in thread
From: Ondřej Bílka @ 2014-03-14 15:01 UTC (permalink / raw)
To: alduc1 at free dot fr; +Cc: glibc-bugs
On Fri, Mar 14, 2014 at 02:51:21PM +0000, alduc1 at free dot fr wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=16623
>
> --- Comment #12 from alduc1 <alduc1 at free dot fr> ---
> I don't know if eglibc and glibc are the same thing but the fix in s_sin.c of
> glibc is not applied to s_sin.c in eglibc 2.19.
>
A correct glibc repository is
git clone git://sourceware.org/git/glibc.git
a eglibc gets merged into glibc so 2.19 its last release.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (11 preceding siblings ...)
2014-03-14 14:51 ` alduc1 at free dot fr
@ 2014-03-14 15:02 ` neleai at seznam dot cz
2014-03-14 15:38 ` schwab@linux-m68k.org
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From: neleai at seznam dot cz @ 2014-03-14 15:02 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
--- Comment #13 from Ondrej Bilka <neleai at seznam dot cz> ---
On Fri, Mar 14, 2014 at 02:51:21PM +0000, alduc1 at free dot fr wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=16623
>
> --- Comment #12 from alduc1 <alduc1 at free dot fr> ---
> I don't know if eglibc and glibc are the same thing but the fix in s_sin.c of
> glibc is not applied to s_sin.c in eglibc 2.19.
>
A correct glibc repository is
git clone git://sourceware.org/git/glibc.git
a eglibc gets merged into glibc so 2.19 its last release.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
` (12 preceding siblings ...)
2014-03-14 15:02 ` neleai at seznam dot cz
@ 2014-03-14 15:38 ` schwab@linux-m68k.org
2014-03-14 17:24 ` joseph at codesourcery dot com
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From: schwab@linux-m68k.org @ 2014-03-14 15:38 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |warshall at 99main dot com
--- Comment #14 from Andreas Schwab <schwab@linux-m68k.org> ---
*** Bug 16708 has been marked as a duplicate of this bug. ***
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
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2014-03-14 15:38 ` schwab@linux-m68k.org
@ 2014-03-14 17:24 ` joseph at codesourcery dot com
2014-06-13 6:34 ` fweimer at redhat dot com
2014-06-14 23:32 ` cvs-commit at gcc dot gnu.org
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From: joseph at codesourcery dot com @ 2014-03-14 17:24 UTC (permalink / raw)
To: glibc-bugs
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--- Comment #15 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I only expect to merge from glibc release branches to EGLIBC release
branches every few months now that EGLIBC is being phased out.
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
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From: fweimer at redhat dot com @ 2014-06-13 6:34 UTC (permalink / raw)
To: glibc-bugs
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Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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* [Bug math/16623] cos change of behavior in 2.19 causes scipy testfailures
2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
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To: glibc-bugs
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--- Comment #16 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
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The branch, gentoo/2.19 has been updated
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commit 4545280f9c1ab06efa9348ab46bac436f5885244
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Thu Feb 27 21:29:16 2014 +0530
Fix sign of input to bsloww1 (BZ #16623)
In 84ba214c, I removed some redundant sign computations and in the
process, I incorrectly got rid of a temporary variable, thus passing
the absolute value of the input to bsloww1. This caused #16623.
This fix undoes the incorrect change.
(cherry picked from commit ffe768a90912f9bce43b70a82576b3dc99e3121c)
https://bugs.gentoo.org/509494
https://sourceware.org/bugzilla/show_bug.cgi?id=16623
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e1449bcd91f738ea4b0b6d75bb3e1f21827cf047
commit e1449bcd91f738ea4b0b6d75bb3e1f21827cf047
Author: Stefan Liebler <stli@linux.vnet.ibm.com>
Date: Thu Jun 12 14:15:25 2014 +0200
posix_spawn_faction_addopen: Add missing string.h include directive
This is needed to avoid a PLT call on s390.
(cherry picked from commit 35a5e3e338ae17f3d42c60a708763c5d498fb840)
https://bugs.gentoo.org/513090
https://sourceware.org/bugzilla/show_bug.cgi?id=17048
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=49ca74fb26ce91b00de6df7bcae7ee2923f5f047
commit 49ca74fb26ce91b00de6df7bcae7ee2923f5f047
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Jun 11 23:12:52 2014 +0200
posix_spawn_file_actions_addopen needs to copy the path argument (BZ 17048)
POSIX requires that we make a copy, so we allocate a new string
and free it in posix_spawn_file_actions_destroy.
Reported by David Reid, Alex Gaynor, and Glyph Lefkowitz. This bug
may have security implications.
(cherry picked from commit 89e435f3559c53084498e9baad22172b64429362)
https://bugs.gentoo.org/513090
https://sourceware.org/bugzilla/show_bug.cgi?id=17048
-----------------------------------------------------------------------
Summary of changes:
posix/spawn_faction_addopen.c | 14 +++++++++++---
posix/spawn_faction_destroy.c | 22 ++++++++++++++++++++--
posix/spawn_int.h | 2 +-
posix/tst-spawn.c | 10 +++++++++-
sysdeps/ieee754/dbl-64/s_sin.c | 16 ++++++++++------
5 files changed, 51 insertions(+), 13 deletions(-)
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2014-02-21 20:40 [Bug libc/16623] New: cos change of behavior in 2.19 causes scipy testfailures jtaylor.debian at googlemail dot com
2014-02-21 22:30 ` [Bug math/16623] " jsm28 at gcc dot gnu.org
2014-02-22 2:52 ` bugdal at aerifal dot cx
2014-02-24 2:34 ` siddhesh at redhat dot com
2014-02-27 15:49 ` cvs-commit at gcc dot gnu.org
2014-02-27 16:01 ` cvs-commit at gcc dot gnu.org
2014-02-27 16:05 ` siddhesh at redhat dot com
2014-03-04 18:24 ` jtaylor.debian at googlemail dot com
2014-03-14 12:40 ` schwab@linux-m68k.org
2014-03-14 13:36 ` alduc1 at free dot fr
2014-03-14 13:57 ` siddhesh at redhat dot com
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2014-03-14 15:01 ` Ondřej Bílka
2014-03-14 15:02 ` neleai at seznam dot cz
2014-03-14 15:38 ` schwab@linux-m68k.org
2014-03-14 17:24 ` joseph at codesourcery dot com
2014-06-13 6:34 ` fweimer at redhat dot com
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