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* [Bug math/6785] erf() does not set errno for underflow
[not found] <bug-6785-131@http.sourceware.org/bugzilla/>
@ 2012-02-29 21:05 ` jsm28 at gcc dot gnu.org
2013-11-28 16:57 ` jsm28 at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-02-29 21:05 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=6785
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|aj at suse dot de |unassigned at sourceware
| |dot org
--- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-02-29 21:04:45 UTC ---
Confirmed with current sources on both x86 and x86_64.
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* [Bug math/6785] erf() does not set errno for underflow
[not found] <bug-6785-131@http.sourceware.org/bugzilla/>
2012-02-29 21:05 ` [Bug math/6785] erf() does not set errno for underflow jsm28 at gcc dot gnu.org
@ 2013-11-28 16:57 ` jsm28 at gcc dot gnu.org
2014-11-28 13:01 ` qniva at yandex dot ru
2023-12-29 11:13 ` gabravier at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2013-11-28 16:57 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=6785
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
It's now documented that errno is only intended to be set to ERANGE for
underflow to 0, not for underflow to subnormals, and erf can't underflow to 0
(the result for small x is about x * 2/sqrt(pi)).
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* [Bug math/6785] erf() does not set errno for underflow
[not found] <bug-6785-131@http.sourceware.org/bugzilla/>
2012-02-29 21:05 ` [Bug math/6785] erf() does not set errno for underflow jsm28 at gcc dot gnu.org
2013-11-28 16:57 ` jsm28 at gcc dot gnu.org
@ 2014-11-28 13:01 ` qniva at yandex dot ru
2023-12-29 11:13 ` gabravier at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: qniva at yandex dot ru @ 2014-11-28 13:01 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=6785
Nadezhda Viukova <qniva at yandex dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |qniva at yandex dot ru
--- Comment #4 from Nadezhda Viukova <qniva at yandex dot ru> ---
IMHO there is a related bug in gcc. See
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64101
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* [Bug math/6785] erf() does not set errno for underflow
[not found] <bug-6785-131@http.sourceware.org/bugzilla/>
` (2 preceding siblings ...)
2014-11-28 13:01 ` qniva at yandex dot ru
@ 2023-12-29 11:13 ` gabravier at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: gabravier at gmail dot com @ 2023-12-29 11:13 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=6785
Gabriel Ravier <gabravier at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gabravier at gmail dot com
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* [Bug math/6785] erf() does not set errno for underflow
2008-07-30 14:52 [Bug math/6785] New: " mtk dot manpages at gmail dot com
@ 2008-07-31 8:50 ` mtk dot manpages at gmail dot com
0 siblings, 0 replies; 5+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 8:50 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 08:49 -------
Created an attachment (id=2850)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2850&action=view)
test program
Sample run showing problem:
$ /tmp/mt_erf subnormal:20
errno == 0
fetestexcept() says: FE_UNDERFLOW FE_INEXACT
erf(2.12199579096527232e-314)=2.39441584310907145e-314
0 FE_UNDERFLOW subnormal
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[not found] <bug-6785-131@http.sourceware.org/bugzilla/>
2012-02-29 21:05 ` [Bug math/6785] erf() does not set errno for underflow jsm28 at gcc dot gnu.org
2013-11-28 16:57 ` jsm28 at gcc dot gnu.org
2014-11-28 13:01 ` qniva at yandex dot ru
2023-12-29 11:13 ` gabravier at gmail dot com
2008-07-30 14:52 [Bug math/6785] New: " mtk dot manpages at gmail dot com
2008-07-31 8:50 ` [Bug math/6785] " mtk dot manpages at gmail dot com
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