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* [Bug math/15490] New: nearbyint scheduling for spurious exceptions
@ 2013-05-19 18:10 jsm28 at gcc dot gnu.org
2013-05-19 18:41 ` [Bug math/15490] " jsm28 at gcc dot gnu.org
2014-06-13 17:44 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-05-19 18:10 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15490
Bug #: 15490
Summary: nearbyint scheduling for spurious exceptions
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
Code in the C nearbyintf and possibly other nearbyint implementations can be
scheduled by the compiler so arithmetic that raises the "inexact" exception
runs after the fesetenv intended to clear that exception.
http://sourceware.org/ml/libc-alpha/2013-05/msg00720.html
gives an example I can reproduce on x86_64 with --disable-multi-arch (otherwise
the SSE4.1 version gets used).
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* [Bug math/15490] nearbyint scheduling for spurious exceptions
2013-05-19 18:10 [Bug math/15490] New: nearbyint scheduling for spurious exceptions jsm28 at gcc dot gnu.org
@ 2013-05-19 18:41 ` jsm28 at gcc dot gnu.org
2014-06-13 17:44 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-05-19 18:41 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15490
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #1 from Joseph Myers <jsm28 at gcc dot gnu.org> 2013-05-19 18:41:21 UTC ---
Fixed for 2.18 by:
commit 3e694268750d51acc6a68b0ee7ded25a52902c20
Author: Joseph Myers <joseph@codesourcery.com>
Date: Sun May 19 18:40:25 2013 +0000
Fix nearbyint scheduling of arithmetic past fesetenv (bug 15490).
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* [Bug math/15490] nearbyint scheduling for spurious exceptions
2013-05-19 18:10 [Bug math/15490] New: nearbyint scheduling for spurious exceptions jsm28 at gcc dot gnu.org
2013-05-19 18:41 ` [Bug math/15490] " jsm28 at gcc dot gnu.org
@ 2014-06-13 17:44 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 17:44 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=15490
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2013-05-19 18:10 [Bug math/15490] New: nearbyint scheduling for spurious exceptions jsm28 at gcc dot gnu.org
2013-05-19 18:41 ` [Bug math/15490] " jsm28 at gcc dot gnu.org
2014-06-13 17:44 ` fweimer at redhat dot com
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