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* [Bug math/13885] New: expm1l inaccurate for x86_64/x86
@ 2012-03-20 23:45 jsm28 at gcc dot gnu.org
2012-05-07 19:21 ` [Bug math/13885] " jsm28 at gcc dot gnu.org
2014-06-26 13:47 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-03-20 23:45 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=13885
Bug #: 13885
Summary: expm1l inaccurate for x86_64/x86
Product: glibc
Version: 2.15
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
The x86 and x86_64 implementations of expm1l, for exponents below 128, involve
a value of log2 (e) to long double precision, when a more accurate value (as in
expl) is needed. For example, this results in a 75ulp error for expm1l (127)
on x86_64.
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^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug math/13885] expm1l inaccurate for x86_64/x86 2012-03-20 23:45 [Bug math/13885] New: expm1l inaccurate for x86_64/x86 jsm28 at gcc dot gnu.org @ 2012-05-07 19:21 ` jsm28 at gcc dot gnu.org 2014-06-26 13:47 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: jsm28 at gcc dot gnu.org @ 2012-05-07 19:21 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=13885 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> 2012-05-07 19:21:15 UTC --- Fixed by: commit 495fd99f3a119e5c0c542ccc6cf9c93b1fb9e892 Author: Joseph Myers <joseph@codesourcery.com> Date: Mon May 7 19:13:08 2012 +0000 Fix x86/x86_64 expm1l inaccuracy and exceptions (bugs 13885, 13923). -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug math/13885] expm1l inaccurate for x86_64/x86 2012-03-20 23:45 [Bug math/13885] New: expm1l inaccurate for x86_64/x86 jsm28 at gcc dot gnu.org 2012-05-07 19:21 ` [Bug math/13885] " jsm28 at gcc dot gnu.org @ 2014-06-26 13:47 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: fweimer at redhat dot com @ 2014-06-26 13:47 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=13885 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |security- -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-06-26 13:47 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-03-20 23:45 [Bug math/13885] New: expm1l inaccurate for x86_64/x86 jsm28 at gcc dot gnu.org 2012-05-07 19:21 ` [Bug math/13885] " jsm28 at gcc dot gnu.org 2014-06-26 13:47 ` fweimer at redhat dot com
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