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* [Bug math/13840] New: hypotf overflow and underflow
@ 2012-03-13 20:39 jsm28 at gcc dot gnu.org
2012-03-14 1:21 ` [Bug math/13840] " jsm28 at gcc dot gnu.org
2014-06-26 13:59 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-03-13 20:39 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=13840
Bug #: 13840
Summary: hypotf overflow and underflow
Product: glibc
Version: 2.15
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: jsm28@gcc.gnu.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
sysdeps/ieee754/flt-32/e_hypotf.c's implementation of hypotf overflows
internally for some large inputs (for example, giving inf for hypotf (0x3p125,
0x4p125) instead of 0x5p125). It also gives inaccurate results for some small
inputs that are not subnormal. I'll send a patch.
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* [Bug math/13840] hypotf overflow and underflow
2012-03-13 20:39 [Bug math/13840] New: hypotf overflow and underflow jsm28 at gcc dot gnu.org
@ 2012-03-14 1:21 ` jsm28 at gcc dot gnu.org
2014-06-26 13:59 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-03-14 1:21 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=13840
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> 2012-03-14 01:20:44 UTC ---
Fixed by:
commit 7c10fd3515f983ca732b2166ccffebbf83603f1f
Author: David S. Miller <davem@davemloft.net>
Date: Tue Mar 13 18:08:58 2012 -0700
Fix hypotf overflow/underflow by using double precision instead of scaling.
[BZ #13840]
* sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Rewrite to use
double-precision for the calculation instead of scaling.
Testcases added by:
commit aa4a2ae1dbc2c7a3469ec13610f0d7a84e3bfc79
Author: Joseph Myers <joseph@codesourcery.com>
Date: Wed Mar 14 01:12:05 2012 +0000
Add tests for hypot overflow/underflow.
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* [Bug math/13840] hypotf overflow and underflow
2012-03-13 20:39 [Bug math/13840] New: hypotf overflow and underflow jsm28 at gcc dot gnu.org
2012-03-14 1:21 ` [Bug math/13840] " jsm28 at gcc dot gnu.org
@ 2014-06-26 13:59 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-26 13:59 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=13840
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2012-03-13 20:39 [Bug math/13840] New: hypotf overflow and underflow jsm28 at gcc dot gnu.org
2012-03-14 1:21 ` [Bug math/13840] " jsm28 at gcc dot gnu.org
2014-06-26 13:59 ` fweimer at redhat dot com
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