[Bug math/6792] New: log1p() does not set errno n error

[Bug math/6792] New: log1p() does not set errno n error

[mtk dot manpages at gmail dot com]

on a pole error or a domain error, log1p correctly raises an exception.  But
errno is not set.  It should be (respectively: ERANGE and EDOM)

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: log1p() does not set errno n error
           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=6792

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.

[Bug math/6792] log1p() does not set errno n error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 09:26 -------
Created an attachment (id=2854)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2854&action=view)
test program

Sample runs demonstrating the problem

$ /tmp/mt_log1p -- -1
errno == 0
fetestexcept() says:  FE_DIVBYZERO
log1p(-1.00000000000000000e+00)=-inf
0 FE_DIVBYZERO -inf

$ /tmp/mt_log1p -- -2
errno == 0
fetestexcept() says:  FE_INVALID
log1p(-2.00000000000000000e+00)=nan
0 FE_INVALID nan


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6792

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.

[Bug math/6792] log1p() does not set errno n error

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6792

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dickinsm at gmail dot com

--- Comment #3 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-02-29 20:12:25 UTC ---
*** Bug 5680 has been marked as a duplicate of this bug. ***

-- 
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.

[Bug math/6792] log1p() does not set errno n error

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6792

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 20:10:06 UTC ---
Confirmed with current sources, 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.