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* [Bug math/15631] New: sqrt spurious inexact exceptions
@ 2013-06-14 20:42 jsm28 at gcc dot gnu.org
2013-06-15 20:00 ` [Bug math/15631] " jsm28 at gcc dot gnu.org
2014-06-13 15:05 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-06-14 20:42 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15631
Bug ID: 15631
Summary: sqrt spurious inexact exceptions
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
The dbl-64 implementation of sqrt raises spurious "inexact" exceptions; as a
fully-defined IEEE 754 operation, sqrt should raise "inexact" if and only if
the result actually is inexact. On MIPS64 (n32 ABI) I see:
Failure: sqrt (2209): Exception "Inexact" set
Failure: sqrt (4): Exception "Inexact" set
Failure: sqrt (0.25): Exception "Inexact" set
Failure: sqrt (6642.25): Exception "Inexact" set
Failure: sqrt (15190.5625): Exception "Inexact" set
(On many platforms, hardware sqrt instructions are used and so this issue does
not appear.)
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* [Bug math/15631] sqrt spurious inexact exceptions
2013-06-14 20:42 [Bug math/15631] New: sqrt spurious inexact exceptions jsm28 at gcc dot gnu.org
@ 2013-06-15 20:00 ` jsm28 at gcc dot gnu.org
2014-06-13 15:05 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-06-15 20:00 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15631
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> ---
Fixed for 2.18 by:
commit 3711a167f6b5203b4414db7853f3c57f1260e1bf
Author: Joseph Myers <joseph@codesourcery.com>
Date: Sat Jun 15 19:59:41 2013 +0000
Fix spurious "inexact" exceptions from dbl-64 sqrt (bug 15631).
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* [Bug math/15631] sqrt spurious inexact exceptions
2013-06-14 20:42 [Bug math/15631] New: sqrt spurious inexact exceptions jsm28 at gcc dot gnu.org
2013-06-15 20:00 ` [Bug math/15631] " jsm28 at gcc dot gnu.org
@ 2014-06-13 15:05 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 15:05 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=15631
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2013-06-14 20:42 [Bug math/15631] New: sqrt spurious inexact exceptions jsm28 at gcc dot gnu.org
2013-06-15 20:00 ` [Bug math/15631] " jsm28 at gcc dot gnu.org
2014-06-13 15:05 ` fweimer at redhat dot com
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