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* [Bug math/14784] New: Spurious underflows from fma when a * b is small @ 2012-10-30 1:03 jsm28 at gcc dot gnu.org 2012-11-01 16:49 ` [Bug math/14784] " jsm28 at gcc dot gnu.org 2014-06-14 11:17 ` fweimer at redhat dot com 0 siblings, 2 replies; 3+ messages in thread From: jsm28 at gcc dot gnu.org @ 2012-10-30 1:03 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=14784 Bug #: 14784 Summary: Spurious underflows from fma when a * b is small Product: glibc Version: 2.16 Status: NEW Severity: normal Priority: P2 Component: math AssignedTo: unassigned@sourceware.org ReportedBy: jsm28@gcc.gnu.org Classification: Unclassified fma (a, b, c) gives spurious underflow exceptions in some cases when a * b is sufficiently small that the implementation uses a * b + c for the computation, but the final result does not underflow. Example, on x86: fmal (0x1p-16382L, -0x1p-16382L, 0x1p16383L). -- 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/14784] Spurious underflows from fma when a * b is small 2012-10-30 1:03 [Bug math/14784] New: Spurious underflows from fma when a * b is small jsm28 at gcc dot gnu.org @ 2012-11-01 16:49 ` jsm28 at gcc dot gnu.org 2014-06-14 11:17 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: jsm28 at gcc dot gnu.org @ 2012-11-01 16:49 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=14784 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> 2012-11-01 16:48:53 UTC --- Fixed by: commit 473611b22d630a5cbb870d2a7edf08071d4d8ace Author: Joseph Myers <joseph@codesourcery.com> Date: Thu Nov 1 16:47:26 2012 +0000 Fix fma (a, b, c) for small a * b (bugs 14784, 14785). -- 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/14784] Spurious underflows from fma when a * b is small 2012-10-30 1:03 [Bug math/14784] New: Spurious underflows from fma when a * b is small jsm28 at gcc dot gnu.org 2012-11-01 16:49 ` [Bug math/14784] " jsm28 at gcc dot gnu.org @ 2014-06-14 11:17 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: fweimer at redhat dot com @ 2014-06-14 11:17 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=14784 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:[~2014-06-14 11:17 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-10-30 1:03 [Bug math/14784] New: Spurious underflows from fma when a * b is small jsm28 at gcc dot gnu.org 2012-11-01 16:49 ` [Bug math/14784] " jsm28 at gcc dot gnu.org 2014-06-14 11:17 ` fweimer at redhat dot com
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