[Bug math/6797] New: lround() and llround() do not set errno on domain error

[Bug math/6797] New: lround() and llround() do not set errno on domain error

[mtk dot manpages at gmail dot com]

On a domain error, lround() and llround() correctly raise an exception, but do
not set errno.  They should set errno to 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: lround() and llround() do not set errno on domain 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=6797

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

[Bug math/6797] lround() and llround() do not set errno on domain error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 10:13 -------
Created an attachment (id=2859)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2859&action=view)
test program


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6797

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

[Bug math/6797] lround() and llround() do not set errno on domain error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 10:14 -------
Created an attachment (id=2860)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2860&action=view)
test program

Sample runs demonstrating the problem:

$ /tmp/mt_lround inf
errno == 0
fetestexcept() says:  FE_INVALID
lround(inf)=-2147483648
0 FE_INVALID normal

$ /tmp/mt_llround inf
errno == 0
fetestexcept() says:  FE_INVALID
llround(inf)=-9223372036854775808
0 FE_INVALID normal

$ /tmp/mt_lround nan
errno == 0
fetestexcept() says:  FE_INVALID
lround(nan)=-2147483648
0 FE_INVALID normal

$ /tmp/mt_llround nan
errno == 0
fetestexcept() says:  FE_INVALID
llround(nan)=-9223372036854775808
0 FE_INVALID normal


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6797

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

[Bug math/6797] lround() and llround() do not set errno on domain error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 10:17 -------
See also http://sourceware.org/bugzilla/show_bug.cgi?id=6798

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6797

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

[Bug math/6797] lround() and llround() do not set errno on domain error

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6797

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|aj at suse dot de           |unassigned at sourceware
                   |                            |dot org

--- Comment #4 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-03-01 16:40:51 UTC ---
Confirmed with current sources on 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.