[Bug math/6787] exp10() does not consistently set errno

[Bug math/6787] exp10() does not consistently set errno

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6787

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 22:22:37 UTC ---
Confirmed with current sources on x86 and x86_64 - with the addition that on
x86_64, the UNDERFLOW exception doesn't get raised on underflow.

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[Bug math/6787] exp10() does not consistently set errno

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6787

--- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
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The branch, master has been updated
       via  2a77a467b273c1a72fa204a8fcc6d22e6e20bb1c (commit)
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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2a77a467b273c1a72fa204a8fcc6d22e6e20bb1c

commit 2a77a467b273c1a72fa204a8fcc6d22e6e20bb1c
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Nov 29 16:32:49 2013 +0000

    Fix exp10 errno setting on underflow (bug 6787).

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog          |    7 +++++++
 NEWS               |   23 ++++++++++++-----------
 math/libm-test.inc |    6 ++++--
 math/w_exp10.c     |    2 +-
 math/w_exp10f.c    |    2 +-
 math/w_exp10l.c    |    2 +-
 6 files changed, 26 insertions(+), 16 deletions(-)

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[Bug math/6787] exp10() does not consistently set errno

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=6787

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.

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[Bug math/6787] exp10() does not consistently set errno

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=6787

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug math/6787] exp10() does not consistently set errno

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 08:55 -------
Created an attachment (id=2852)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2852&action=view)
test program

Sample run showing problem.  Note that errno is set for overflow, but not for
underflow.

$ /tmp/mt_exp10 -- -1e5
errno == 0
fetestexcept() says:  FE_UNDERFLOW FE_INEXACT
exp10(-1.00000000000000000e+05)=0.00000000000000000e+00
0 FE_UNDERFLOW +0

$ /tmp/mt_exp10 -- 1e5
errno == ERANGE
fetestexcept() says:  FE_OVERFLOW FE_INEXACT
exp10(1.00000000000000000e+05)=inf
ERANGE FE_OVERFLOW +inf


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