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* [Bug math/6803] New: scalb(), scalbln(), scalbn() do not set errno on overflow/underflow
@ 2008-07-31 11:07 mtk dot manpages at gmail dot com
  2008-07-31 11:07 ` [Bug math/6803] " mtk dot manpages at gmail dot com
                   ` (3 more replies)
  0 siblings, 4 replies; 11+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 11:07 UTC (permalink / raw)
  To: glibc-bugs

On overflow and underflow, scalb(), scalbln(), scalbn() correctly raises
exceptions.  But errno is not set.  For these errors 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: scalb(), scalbln(), scalbn() do not set errno on
                    overflow/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=6803

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^ permalink raw reply	[flat|nested] 11+ messages in thread
[parent not found: <bug-6803-131@http.sourceware.org/bugzilla/>]
end of thread, other threads:[~2020-05-26  9:20 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-07-31 11:07 [Bug math/6803] New: scalb(), scalbln(), scalbn() do not set errno on overflow/underflow mtk dot manpages at gmail dot com
2008-07-31 11:07 ` [Bug math/6803] " mtk dot manpages at gmail dot com
2008-07-31 11:08 ` mtk dot manpages at gmail dot com
2008-07-31 11:09 ` mtk dot manpages at gmail dot com
2008-07-31 11:12 ` mtk dot manpages at gmail dot com
     [not found] <bug-6803-131@http.sourceware.org/bugzilla/>
2012-03-01 17:35 ` jsm28 at gcc dot gnu.org
2014-03-31 14:58 ` cvs-commit at gcc dot gnu.org
2015-09-16 21:12 ` cvs-commit at gcc dot gnu.org
2015-09-16 21:13 ` jsm28 at gcc dot gnu.org
2020-05-23 10:44 ` mtk.manpages at gmail dot com
2020-05-26  9:20 ` mtk.manpages at gmail dot com

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