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* [Bug math/16338] New: ldbl-128 logl does not handle subnormals
@ 2013-12-18 0:03 jsm28 at gcc dot gnu.org
2013-12-18 11:49 ` [Bug math/16338] " jsm28 at gcc dot gnu.org
2014-06-13 9:30 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-12-18 0:03 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16338
Bug ID: 16338
Summary: ldbl-128 logl does not handle subnormals
Product: glibc
Version: 2.19
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: jsm28 at gcc dot gnu.org
The ldbl-128 logl implementation treats subnormals as if their exponent is
normal, resulting in large errors (e.g. logl (0x1p-16494L) is
-0x1.62dea45ee3e064dbc66918126b26p+13 when it should be
-0x1.6546282207802c89d24d65e96274p+13). I think this is in turn the cause of
large lgammal errors in libm testing.
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^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug math/16338] ldbl-128 logl does not handle subnormals 2013-12-18 0:03 [Bug math/16338] New: ldbl-128 logl does not handle subnormals jsm28 at gcc dot gnu.org @ 2013-12-18 11:49 ` jsm28 at gcc dot gnu.org 2014-06-13 9:30 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-12-18 11:49 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=16338 Joseph Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> --- Fixed for 2.19. -- 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/16338] ldbl-128 logl does not handle subnormals 2013-12-18 0:03 [Bug math/16338] New: ldbl-128 logl does not handle subnormals jsm28 at gcc dot gnu.org 2013-12-18 11:49 ` [Bug math/16338] " jsm28 at gcc dot gnu.org @ 2014-06-13 9:30 ` fweimer at redhat dot com 1 sibling, 0 replies; 3+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 9:30 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=16338 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 9:30 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-12-18 0:03 [Bug math/16338] New: ldbl-128 logl does not handle subnormals jsm28 at gcc dot gnu.org 2013-12-18 11:49 ` [Bug math/16338] " jsm28 at gcc dot gnu.org 2014-06-13 9:30 ` fweimer at redhat dot com
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