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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. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [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)). -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [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 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [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 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug math/6785] New: erf() does not set errno for underflow @ 2008-07-30 14:52 mtk dot manpages at gmail dot com 2008-07-31 8:50 ` [Bug math/6785] " mtk dot manpages at gmail dot com 0 siblings, 1 reply; 5+ messages in thread From: mtk dot manpages at gmail dot com @ 2008-07-30 14:52 UTC (permalink / raw) To: glibc-bugs When erf() is given a subnormal argument, it raises an underflow exception. However errno is not set. It 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: erf() does not set errno for 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=6785 ------- 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] 5+ messages in thread
* [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 -- http://sourceware.org/bugzilla/show_bug.cgi?id=6785 ------- 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] 5+ messages in thread
end of thread, other threads:[~2023-12-29 11:13 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [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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