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* [Bug math/17097] New: ldbl-128 powl bad sign in overflow cases
@ 2014-06-27 21:44 jsm28 at gcc dot gnu.org
2014-06-29 11:50 ` [Bug math/17097] " jsm28 at gcc dot gnu.org
2014-06-29 12:17 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2014-06-27 21:44 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17097
Bug ID: 17097
Summary: ldbl-128 powl bad sign in overflow cases
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
As noted in https://sourceware.org/ml/libc-alpha/2014-06/msg00834.html ldbl-128
powl produces results with the wrong sign for some overflow cases, e.g.:
Failure: Test: pow_downward (-0x2p+0, 0x1.ffffffffffffffffffffffffffffp+112)
Result:
is: 1.18973149535723176508e+4932 0x1.ffffffffffffffffffffp+16383
should be: -inf -inf
This applies for non-default rounding modes, and in the default rounding mode
if -lieee is used.
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* [Bug math/17097] ldbl-128 powl bad sign in overflow cases
2014-06-27 21:44 [Bug math/17097] New: ldbl-128 powl bad sign in overflow cases jsm28 at gcc dot gnu.org
@ 2014-06-29 11:50 ` jsm28 at gcc dot gnu.org
2014-06-29 12:17 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2014-06-29 11:50 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17097
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 2.20.
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* [Bug math/17097] ldbl-128 powl bad sign in overflow cases
2014-06-27 21:44 [Bug math/17097] New: ldbl-128 powl bad sign in overflow cases jsm28 at gcc dot gnu.org
2014-06-29 11:50 ` [Bug math/17097] " jsm28 at gcc dot gnu.org
@ 2014-06-29 12:17 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-29 12:17 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17097
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2014-06-27 21:44 [Bug math/17097] New: ldbl-128 powl bad sign in overflow cases jsm28 at gcc dot gnu.org
2014-06-29 11:50 ` [Bug math/17097] " jsm28 at gcc dot gnu.org
2014-06-29 12:17 ` fweimer at redhat dot com
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