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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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* [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.
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* [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-
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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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