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* [Bug math/15423] New: catan, catanh spurious underflows
@ 2013-04-30 21:22 jsm28 at gcc dot gnu.org
2013-05-01 10:07 ` [Bug math/15423] " jsm28 at gcc dot gnu.org
2014-06-13 18:09 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-04-30 21:22 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15423
Bug #: 15423
Summary: catan, catanh spurious underflows
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
catan and catanh can produce spurious underflow exceptions from squaring the
real and imaginary parts of their arguments. These in turn can lead to other
spurious exceptions and inaccurate results. Examples on x86_64: catan (1.0 +
0x1p-1020i) (spurious underflow), catan (0x1p-1020 + 1.0i) (spurious underflow
and divide-by-zero), catan (0x1p-512 + 1.0i) (spurious underflow and overflow),
catan (0x1.3p-536 - 1.0i) (spurious underflow, imaginary part of result is
inaccurate, -185.9367... but should be -186.0240...).
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* [Bug math/15423] catan, catanh spurious underflows
2013-04-30 21:22 [Bug math/15423] New: catan, catanh spurious underflows jsm28 at gcc dot gnu.org
@ 2013-05-01 10:07 ` jsm28 at gcc dot gnu.org
2014-06-13 18:09 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-05-01 10:07 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15423
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> 2013-05-01 10:07:52 UTC ---
Fixed for 2.18 by:
commit 10de07f5fdd9eaf3a808d4461401f5b661095614
Author: Joseph Myers <joseph@codesourcery.com>
Date: Wed May 1 10:07:00 2013 +0000
Fix catan, catanh spurious underflows (bug 15423).
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* [Bug math/15423] catan, catanh spurious underflows
2013-04-30 21:22 [Bug math/15423] New: catan, catanh spurious underflows jsm28 at gcc dot gnu.org
2013-05-01 10:07 ` [Bug math/15423] " jsm28 at gcc dot gnu.org
@ 2014-06-13 18:09 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 18:09 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=15423
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2013-04-30 21:22 [Bug math/15423] New: catan, catanh spurious underflows jsm28 at gcc dot gnu.org
2013-05-01 10:07 ` [Bug math/15423] " jsm28 at gcc dot gnu.org
2014-06-13 18:09 ` fweimer at redhat dot com
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