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* [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

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^ 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)
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     [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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