public inbox for glibc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug math/15394] New: Inaccurate imaginary part of catan result, real part of catanh result
@ 2013-04-24 15:37 jsm28 at gcc dot gnu.org
2013-04-24 18:50 ` [Bug math/15394] " jsm28 at gcc dot gnu.org
2014-06-13 18:17 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-04-24 15:37 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15394
Bug #: 15394
Summary: Inaccurate imaginary part of catan result, real part
of catanh result
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 can produce results with inaccurate imaginary part from the use of log of
numbers very close to 1; likewise, catanh can produce results with inaccurate
real part. For example, on x86_64, catan (0x1p500i) produces imaginary part 0,
and catanh (0x1p500) produces real part 0, when the expected value is
3.0549...e-151 in each case.
--
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/15394] Inaccurate imaginary part of catan result, real part of catanh result 2013-04-24 15:37 [Bug math/15394] New: Inaccurate imaginary part of catan result, real part of catanh result jsm28 at gcc dot gnu.org @ 2013-04-24 18:50 ` jsm28 at gcc dot gnu.org 2014-06-13 18:17 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-04-24 18:50 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15394 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> 2013-04-24 18:50:05 UTC --- Fixed for 2.18 by: commit 2f38fbfe09e4856c571bf0c80844e5dac9bc77ec Author: Joseph Myers <joseph@codesourcery.com> Date: Wed Apr 24 18:49:13 2013 +0000 Fix catan, catanh inaccuracy through use of log (bug 15394). -- 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/15394] Inaccurate imaginary part of catan result, real part of catanh result 2013-04-24 15:37 [Bug math/15394] New: Inaccurate imaginary part of catan result, real part of catanh result jsm28 at gcc dot gnu.org 2013-04-24 18:50 ` [Bug math/15394] " jsm28 at gcc dot gnu.org @ 2014-06-13 18:17 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 18:17 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=15394 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:[~2014-06-13 18:17 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-04-24 15:37 [Bug math/15394] New: Inaccurate imaginary part of catan result, real part of catanh result jsm28 at gcc dot gnu.org 2013-04-24 18:50 ` [Bug math/15394] " jsm28 at gcc dot gnu.org 2014-06-13 18:17 ` fweimer at redhat dot com
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).