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* [Bug math/6806] New: y0(), y1(), yn() do not raise exception on underflow
@ 2008-07-31 11:59 mtk dot manpages at gmail dot com
2008-07-31 12:02 ` [Bug math/6806] " mtk dot manpages at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 7+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 11:59 UTC (permalink / raw)
To: glibc-bugs
On underflow, y0(), y1(), yn() correctly set errno to ERANGE, but do not raise
an IEEE underflow exception. They should raise an FE_UNDERFLOW exception.
Background:
On error, many glibc math functions both set errno and raise an exception
(fetestexcept(3)). For example, the following function all do this: acos(),
asin(), cosh(), sinh(), acosh(), asinh(), exp(), exp2(), ldexp(), log(),
log10(), log2(). However, there is much inconsistency. Some functions raise an
exception, but don't set errno. Some functions set errno for some errors, but
not others. A few set errno, but don't raise an exception. This series of bug
reports documents deviations from what I consider the ideal: all functions
should BOTH set errno AND raise an exception for all errors.
All of these reports relate to tests on glibc 2.8 (as provided by SUSE 11.0).
--
Summary: y0(), y1(), yn() do not raise exception on underflow
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: aj at suse dot de
ReportedBy: mtk dot manpages at gmail dot com
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=6806
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* [Bug math/6806] y0(), y1(), yn() do not raise exception on underflow
2008-07-31 11:59 [Bug math/6806] New: y0(), y1(), yn() do not raise exception on underflow mtk dot manpages at gmail dot com
@ 2008-07-31 12:02 ` mtk dot manpages at gmail dot com
2008-07-31 12:02 ` mtk dot manpages at gmail dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 7+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 12:02 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 12:00 -------
Created an attachment (id=2874)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2874&action=view)
test program
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6806
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* [Bug math/6806] y0(), y1(), yn() do not raise exception on underflow
2008-07-31 11:59 [Bug math/6806] New: y0(), y1(), yn() do not raise exception on underflow mtk dot manpages at gmail dot com
2008-07-31 12:02 ` [Bug math/6806] " mtk dot manpages at gmail dot com
@ 2008-07-31 12:02 ` mtk dot manpages at gmail dot com
2008-07-31 12:03 ` mtk dot manpages at gmail dot com
2008-07-31 12:35 ` mtk dot manpages at gmail dot com
3 siblings, 0 replies; 7+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 12:02 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 12:01 -------
Created an attachment (id=2875)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2875&action=view)
test program
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6806
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* [Bug math/6806] y0(), y1(), yn() do not raise exception on underflow
2008-07-31 11:59 [Bug math/6806] New: y0(), y1(), yn() do not raise exception on underflow mtk dot manpages at gmail dot com
2008-07-31 12:02 ` [Bug math/6806] " mtk dot manpages at gmail dot com
2008-07-31 12:02 ` mtk dot manpages at gmail dot com
@ 2008-07-31 12:03 ` mtk dot manpages at gmail dot com
2008-07-31 12:35 ` mtk dot manpages at gmail dot com
3 siblings, 0 replies; 7+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 12:03 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 12:02 -------
Created an attachment (id=2876)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=2876&action=view)
test program
Sample runs demonstrating the problem
$ /tmp/mt_y0 dbl_max
errno == ERANGE
fetestexcept() says: FE_INEXACT
y0(1.79769313486231571e+308)=0.00000000000000000e+00
ERANGE 0 +0
$ /tmp/mt_y1 dbl_max
errno == ERANGE
fetestexcept() says: FE_INEXACT
y1(1.79769313486231571e+308)=0.00000000000000000e+00
ERANGE 0 +0
$ /tmp/mt_yn 10 dbl_max
errno == ERANGE
fetestexcept() says: FE_INEXACT
yn(10,1.79769313486231571e+308)=0.00000000000000000e+00
ERANGE 0 +0
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6806
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* [Bug math/6806] y0(), y1(), yn() do not raise exception on underflow
2008-07-31 11:59 [Bug math/6806] New: y0(), y1(), yn() do not raise exception on underflow mtk dot manpages at gmail dot com
` (2 preceding siblings ...)
2008-07-31 12:03 ` mtk dot manpages at gmail dot com
@ 2008-07-31 12:35 ` mtk dot manpages at gmail dot com
3 siblings, 0 replies; 7+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 12:35 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 12:33 -------
In passing, it is worth noting that these functions do correctly set errno and
raise the right exception at least one other error (domain error).
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6806
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[parent not found: <bug-6806-131@http.sourceware.org/bugzilla/>]
end of thread, other threads:[~2013-11-28 16:56 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-07-31 11:59 [Bug math/6806] New: y0(), y1(), yn() do not raise exception on underflow mtk dot manpages at gmail dot com
2008-07-31 12:02 ` [Bug math/6806] " mtk dot manpages at gmail dot com
2008-07-31 12:02 ` mtk dot manpages at gmail dot com
2008-07-31 12:03 ` mtk dot manpages at gmail dot com
2008-07-31 12:35 ` mtk dot manpages at gmail dot com
[not found] <bug-6806-131@http.sourceware.org/bugzilla/>
2012-03-01 17:51 ` jsm28 at gcc dot gnu.org
2013-11-28 16:56 ` jsm28 at gcc dot gnu.org
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