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* [Bug math/6788] New: expm1() does not set errno on overflow @ 2008-07-30 15:09 mtk dot manpages at gmail dot com 2008-07-31 8:58 ` [Bug math/6788] " mtk dot manpages at gmail dot com ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: mtk dot manpages at gmail dot com @ 2008-07-30 15:09 UTC (permalink / raw) To: glibc-bugs On overflow, expm1() raises an overflow exception (e.g., expm1(1e4) on x86-32), but does not set errno. For this case, errno should be set to ERANGE. 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: expm1() does not set errno on overflow 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=6788 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/6788] expm1() does not set errno on overflow 2008-07-30 15:09 [Bug math/6788] New: expm1() does not set errno on overflow mtk dot manpages at gmail dot com @ 2008-07-31 8:58 ` mtk dot manpages at gmail dot com 2010-09-11 15:24 ` mtk dot manpages at gmail dot com 2010-09-12 6:39 ` mtk dot manpages at gmail dot com 2 siblings, 0 replies; 4+ messages in thread From: mtk dot manpages at gmail dot com @ 2008-07-31 8:58 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 08:57 ------- Created an attachment (id=2853) --> (http://sourceware.org/bugzilla/attachment.cgi?id=2853&action=view) test program Sample run demonstrating problem (note that raising FE_INVALID here is probably also a bug): $ /tmp/mt_expm1 1e5 errno == 0 fetestexcept() says: FE_INVALID FE_OVERFLOW FE_INEXACT expm1(1.00000000000000000e+05)=nan 0 FE_OVERFLOW nan -- http://sourceware.org/bugzilla/show_bug.cgi?id=6788 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/6788] expm1() does not set errno on overflow 2008-07-30 15:09 [Bug math/6788] New: expm1() does not set errno on overflow mtk dot manpages at gmail dot com 2008-07-31 8:58 ` [Bug math/6788] " mtk dot manpages at gmail dot com @ 2010-09-11 15:24 ` mtk dot manpages at gmail dot com 2010-09-12 6:39 ` mtk dot manpages at gmail dot com 2 siblings, 0 replies; 4+ messages in thread From: mtk dot manpages at gmail dot com @ 2010-09-11 15:24 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From mtk dot manpages at gmail dot com 2010-09-11 15:24 ------- This bug was fixed in glibc 2.10. The man page is updated for man-pages-2.37. -- What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://sourceware.org/bugzilla/show_bug.cgi?id=6788 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/6788] expm1() does not set errno on overflow 2008-07-30 15:09 [Bug math/6788] New: expm1() does not set errno on overflow mtk dot manpages at gmail dot com 2008-07-31 8:58 ` [Bug math/6788] " mtk dot manpages at gmail dot com 2010-09-11 15:24 ` mtk dot manpages at gmail dot com @ 2010-09-12 6:39 ` mtk dot manpages at gmail dot com 2 siblings, 0 replies; 4+ messages in thread From: mtk dot manpages at gmail dot com @ 2010-09-12 6:39 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From mtk dot manpages at gmail dot com 2010-09-12 06:38 ------- Correcting my earl(In reply to comment #2) > This bug was fixed in glibc 2.10. The man page is updated for man-pages-2.37. Correction. It looks like the fix was in 2.11, or possibly 2.12. I have no test system for 2.11, but 2.12 passes. From the source (sysdeps/i386/fpu/s_expm1.S) it looks like the changes were in 2.11. -- http://sourceware.org/bugzilla/show_bug.cgi?id=6788 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-09-12 6:39 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2008-07-30 15:09 [Bug math/6788] New: expm1() does not set errno on overflow mtk dot manpages at gmail dot com 2008-07-31 8:58 ` [Bug math/6788] " mtk dot manpages at gmail dot com 2010-09-11 15:24 ` mtk dot manpages at gmail dot com 2010-09-12 6:39 ` mtk dot manpages at gmail dot com
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