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* [Bug math/15485] New: remainder incorrect in directed rounding modes
@ 2013-05-17 16:34 jsm28 at gcc dot gnu.org
2013-05-17 19:05 ` [Bug math/15485] " jsm28 at gcc dot gnu.org
2014-06-13 17:44 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-05-17 16:34 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15485
Bug #: 15485
Summary: remainder incorrect in directed rounding modes
Product: glibc
Version: 2.17
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: unassigned@sourceware.org
ReportedBy: jsm28@gcc.gnu.org
Classification: Unclassified
The result of the remainder function is fully specified by ISO C and is
supposed to be independent of the rounding mode. However, on x86_64, remainder
(3.0, 2.0) gives the correct result (-1) in FE_TONEAREST mode, but incorrect +1
in FE_DOWNWARD and FE_TOWARDZERO modes. remainder (5.0, 2.0) should be +1, but
is incorrectly -1 in FE_UPWARD mode. So only FE_TONEAREST mode appears to get
the right results.
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^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug math/15485] remainder incorrect in directed rounding modes 2013-05-17 16:34 [Bug math/15485] New: remainder incorrect in directed rounding modes jsm28 at gcc dot gnu.org @ 2013-05-17 19:05 ` jsm28 at gcc dot gnu.org 2014-06-13 17:44 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-05-17 19:05 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15485 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> 2013-05-17 19:05:20 UTC --- Fixed for 2.18 by: commit bb38759d6dc78b1818f5d23129a362d6f5aba267 Author: Joseph Myers <joseph@codesourcery.com> Date: Fri May 17 19:04:08 2013 +0000 Fix remainder exceptions and directed-rounding results (bugs 15480, 15485). -- 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/15485] remainder incorrect in directed rounding modes 2013-05-17 16:34 [Bug math/15485] New: remainder incorrect in directed rounding modes jsm28 at gcc dot gnu.org 2013-05-17 19:05 ` [Bug math/15485] " jsm28 at gcc dot gnu.org @ 2014-06-13 17:44 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 17:44 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=15485 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 17:44 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-05-17 16:34 [Bug math/15485] New: remainder incorrect in directed rounding modes jsm28 at gcc dot gnu.org 2013-05-17 19:05 ` [Bug math/15485] " jsm28 at gcc dot gnu.org 2014-06-13 17:44 ` fweimer at redhat dot com
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