[Bug math/6810] tgamma() does not set errno for underflow error

[Bug math/6810] tgamma() does not set errno for underflow error

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6810

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> 2012-03-01 23:29:18 UTC ---
Confirmed for current sources on both x86 and x86_64 - with the addition that
on x86_64, the underflow exception for -100000.5 is also missing (it's present
on x86).

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[Bug math/6810] tgamma() does not set errno for underflow error

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6810

--- 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  e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474 (commit)
      from  bbf37bdc12c0370a0ac2fa597cddd660bad6ec5e (commit)

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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474

commit e47cc4e0ed06f4167b6bd8ac39e12d094e0dc474
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Dec 5 14:01:41 2013 +0000

    Fix tgamma errno setting on underflow (bug 6810).

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

Summary of changes:
 ChangeLog                         |   13 +
 NEWS                              |   26 +-
 math/auto-libm-test-in            |  294 ++--
 math/auto-libm-test-out           | 4962 +++++++++++++++++++------------------
 math/w_tgamma.c                   |    5 +-
 math/w_tgammaf.c                  |    6 +-
 math/w_tgammal.c                  |    5 +-
 sysdeps/i386/fpu/libm-test-ulps   |    3 +
 sysdeps/x86_64/fpu/libm-test-ulps |    3 +
 9 files changed, 2696 insertions(+), 2621 deletions(-)

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[Bug math/6810] tgamma() does not set errno for underflow error

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=6810

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/6810] tgamma() does not set errno for underflow error

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=6810

Florian Weimer <fweimer at redhat dot com> changed:

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

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[Bug math/6810] tgamma() does not set errno for underflow error

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 13:53 -------
Created an attachment (id=2882)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2882&action=view)
test program

Sample runs demonstrating the problem:

$ /tmp/mt_tgamma 1e3
errno == ERANGE
fetestexcept() says:  FE_OVERFLOW FE_INEXACT
tgamma(1.00000000000000000e+03)=inf
ERANGE FE_OVERFLOW +inf

$ /tmp/mt_tgamma -- -100000.5
errno == 0
fetestexcept() says:  FE_UNDERFLOW FE_INEXACT
tgamma(-1.00000500000000000e+05)=-0.00000000000000000e+00
0 FE_UNDERFLOW -0


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