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* [Bug math/3406] New: expf(x) gives infinity where correctly rounded result is finite
@ 2006-10-22 0:22 myles at peakstreaminc dot com
2006-10-22 0:26 ` [Bug math/3406] " myles at peakstreaminc dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: myles at peakstreaminc dot com @ 2006-10-22 0:22 UTC (permalink / raw)
To: glibc-bugs
glibc-2.3.4-2.19
gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)
The attached sample program takes expf(x) and float(exp(x)) for a number x
such that the exponential is ALMOST +INF in 32-bit floating point. expf(x)
returns (incorrectly) INF, where float(exp(x)) is finite.
--
Summary: expf(x) gives infinity where correctly rounded result is
finite
Product: glibc
Version: 2.3.4
Status: NEW
Severity: minor
Priority: P2
Component: math
AssignedTo: aj at suse dot de
ReportedBy: myles at peakstreaminc dot com
CC: glibc-bugs at sources dot redhat dot com
GCC host triplet: 2.6.9-34.ELsmp
http://sourceware.org/bugzilla/show_bug.cgi?id=3406
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^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug math/3406] expf(x) gives infinity where correctly rounded result is finite 2006-10-22 0:22 [Bug math/3406] New: expf(x) gives infinity where correctly rounded result is finite myles at peakstreaminc dot com @ 2006-10-22 0:26 ` myles at peakstreaminc dot com 2008-02-11 20:52 ` jsm28 at gcc dot gnu dot org 2008-05-11 17:50 ` drepper at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: myles at peakstreaminc dot com @ 2006-10-22 0:26 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From myles at peakstreaminc dot com 2006-10-22 00:26 ------- Created an attachment (id=1383) --> (http://sourceware.org/bugzilla/attachment.cgi?id=1383&action=view) sample program that reproduces the problem Program output: x is 88.7220001220703125 expf(x) is inf exp(x) is 339996993417815084460509669606173966336 -- http://sourceware.org/bugzilla/show_bug.cgi?id=3406 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/3406] expf(x) gives infinity where correctly rounded result is finite 2006-10-22 0:22 [Bug math/3406] New: expf(x) gives infinity where correctly rounded result is finite myles at peakstreaminc dot com 2006-10-22 0:26 ` [Bug math/3406] " myles at peakstreaminc dot com @ 2008-02-11 20:52 ` jsm28 at gcc dot gnu dot org 2008-05-11 17:50 ` drepper at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: jsm28 at gcc dot gnu dot org @ 2008-02-11 20:52 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From jsm28 at gcc dot gnu dot org 2008-02-11 20:52 ------- Patch submitted: http://sourceware.org/ml/libc-alpha/2008-02/msg00011.html -- http://sourceware.org/bugzilla/show_bug.cgi?id=3406 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/3406] expf(x) gives infinity where correctly rounded result is finite 2006-10-22 0:22 [Bug math/3406] New: expf(x) gives infinity where correctly rounded result is finite myles at peakstreaminc dot com 2006-10-22 0:26 ` [Bug math/3406] " myles at peakstreaminc dot com 2008-02-11 20:52 ` jsm28 at gcc dot gnu dot org @ 2008-05-11 17:50 ` drepper at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: drepper at redhat dot com @ 2008-05-11 17:50 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From drepper at redhat dot com 2008-05-11 17:49 ------- Fixed in cvs. -- What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://sourceware.org/bugzilla/show_bug.cgi?id=3406 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2008-05-11 17:50 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2006-10-22 0:22 [Bug math/3406] New: expf(x) gives infinity where correctly rounded result is finite myles at peakstreaminc dot com 2006-10-22 0:26 ` [Bug math/3406] " myles at peakstreaminc dot com 2008-02-11 20:52 ` jsm28 at gcc dot gnu dot org 2008-05-11 17:50 ` drepper at redhat dot com
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