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* [Bug math/6786] New: erfc() does not set errno for underflow @ 2008-07-30 14:54 mtk dot manpages at gmail dot com 2008-07-31 8:53 ` [Bug math/6786] " mtk dot manpages at gmail dot com 0 siblings, 1 reply; 6+ messages in thread From: mtk dot manpages at gmail dot com @ 2008-07-30 14:54 UTC (permalink / raw) To: glibc-bugs When erfc() is given an argument that causes underflow (e.g., erfc(106.9) on x8632) it raises an underflow exception. However, errno is not set. It should be set to ERANGE for this case. 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: erfc() 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=6786 ------- 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] 6+ messages in thread
* [Bug math/6786] erfc() does not set errno for underflow 2008-07-30 14:54 [Bug math/6786] New: erfc() does not set errno for underflow mtk dot manpages at gmail dot com @ 2008-07-31 8:53 ` mtk dot manpages at gmail dot com 0 siblings, 0 replies; 6+ messages in thread From: mtk dot manpages at gmail dot com @ 2008-07-31 8:53 UTC (permalink / raw) To: glibc-bugs ------- Additional Comments From mtk dot manpages at gmail dot com 2008-07-31 08:52 ------- Created an attachment (id=2851) --> (http://sourceware.org/bugzilla/attachment.cgi?id=2851&action=view) test program (I got the underflow value wrong in my initial report. I think 106.9 gives underflow with the long double variant. 27 doies the trick for the double version.) Sample run showing problem: $ /tmp/mt_erfc 27 errno == 0 fetestexcept() says: FE_UNDERFLOW FE_INEXACT erfc(2.70000000000000000e+01)=5.23704643935262924e-319 0 FE_UNDERFLOW subnormal -- http://sourceware.org/bugzilla/show_bug.cgi?id=6786 ------- 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] 6+ messages in thread
[parent not found: <bug-6786-131@http.sourceware.org/bugzilla/>]
* [Bug math/6786] erfc() does not set errno for underflow [not found] <bug-6786-131@http.sourceware.org/bugzilla/> @ 2012-02-29 21:07 ` jsm28 at gcc dot gnu.org 2013-12-03 16:25 ` cvs-commit at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 6+ messages in thread From: jsm28 at gcc dot gnu.org @ 2012-02-29 21:07 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=6786 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 21:06:48 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] 6+ messages in thread
* [Bug math/6786] erfc() does not set errno for underflow [not found] <bug-6786-131@http.sourceware.org/bugzilla/> 2012-02-29 21:07 ` jsm28 at gcc dot gnu.org @ 2013-12-03 16:25 ` cvs-commit at gcc dot gnu.org 2013-12-03 16:26 ` jsm28 at gcc dot gnu.org 2014-06-13 11:17 ` fweimer at redhat dot com 3 siblings, 0 replies; 6+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2013-12-03 16:25 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=6786 --- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> --- This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GNU C Library master sources". The branch, master has been updated via 34e16df5a1a46e128edb9eb44a09ac5762957136 (commit) from d8e2dbe3e380729a1552d546da582b02202dde0a (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34e16df5a1a46e128edb9eb44a09ac5762957136 commit 34e16df5a1a46e128edb9eb44a09ac5762957136 Author: Joseph Myers <joseph@codesourcery.com> Date: Tue Dec 3 16:25:18 2013 +0000 Fix erfc errno setting on underflow (bug 6786). ----------------------------------------------------------------------- Summary of changes: ChangeLog | 18 ++ NEWS | 24 ++-- math/auto-libm-test-in | 13 ++- math/auto-libm-test-out | 302 +++++++++++++++++++++++++++++++++- sysdeps/i386/fpu/libm-test-ulps | 3 + sysdeps/ieee754/dbl-64/s_erf.c | 17 ++- sysdeps/ieee754/flt-32/s_erff.c | 19 ++- sysdeps/ieee754/ldbl-128/s_erfl.c | 13 ++- sysdeps/ieee754/ldbl-128ibm/s_erfl.c | 13 ++- sysdeps/ieee754/ldbl-96/s_erfl.c | 13 ++- sysdeps/x86_64/fpu/libm-test-ulps | 3 + 11 files changed, 410 insertions(+), 28 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/6786] erfc() does not set errno for underflow [not found] <bug-6786-131@http.sourceware.org/bugzilla/> 2012-02-29 21:07 ` jsm28 at gcc dot gnu.org 2013-12-03 16:25 ` cvs-commit at gcc dot gnu.org @ 2013-12-03 16:26 ` jsm28 at gcc dot gnu.org 2014-06-13 11:17 ` fweimer at redhat dot com 3 siblings, 0 replies; 6+ messages in thread From: jsm28 at gcc dot gnu.org @ 2013-12-03 16:26 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=6786 Joseph Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #4 from Joseph Myers <jsm28 at gcc dot gnu.org> --- Fixed for 2.19. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug math/6786] erfc() does not set errno for underflow [not found] <bug-6786-131@http.sourceware.org/bugzilla/> ` (2 preceding siblings ...) 2013-12-03 16:26 ` jsm28 at gcc dot gnu.org @ 2014-06-13 11:17 ` fweimer at redhat dot com 3 siblings, 0 replies; 6+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 11:17 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=6786 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |security- -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-06-13 11:17 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2008-07-30 14:54 [Bug math/6786] New: erfc() does not set errno for underflow mtk dot manpages at gmail dot com 2008-07-31 8:53 ` [Bug math/6786] " mtk dot manpages at gmail dot com [not found] <bug-6786-131@http.sourceware.org/bugzilla/> 2012-02-29 21:07 ` jsm28 at gcc dot gnu.org 2013-12-03 16:25 ` cvs-commit at gcc dot gnu.org 2013-12-03 16:26 ` jsm28 at gcc dot gnu.org 2014-06-13 11:17 ` fweimer at redhat dot com
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