[Bug math/16330] New: hypot spurious underflows with subnormal arguments

[Bug math/16330] New: hypot spurious underflows with subnormal arguments

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=16330

            Bug ID: 16330
           Summary: hypot spurious underflows with subnormal arguments
           Product: glibc
           Version: 2.19
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: jsm28 at gcc dot gnu.org

On x86_64, hypot (0x0.fffffffffffffp-1022, 0x0.fp-1023) produces a spurious
underflow exception although the result is in the normal range.  (I think
similar issues will apply to ldbl-96 and ldbl-128 hypotl as well.)  Cause
related to bug 16316, although the symptoms are different.

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[Bug math/16330] hypot spurious underflows with subnormal arguments

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=16330

--- Comment #1 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  c88769dda4199d15267259fd3c9b986e6690a901 (commit)
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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c88769dda4199d15267259fd3c9b986e6690a901

commit c88769dda4199d15267259fd3c9b986e6690a901
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Dec 17 13:42:13 2013 +0000

    Fix hypot handling of subnormals (bug 16316, bug 16330).

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

Summary of changes:
 ChangeLog                           |   16 +
 NEWS                                |    2 +-
 math/auto-libm-test-in              |   16 +-
 math/auto-libm-test-out             | 2531 +++++++++++++++++++++++++----------
 sysdeps/ieee754/dbl-64/e_hypot.c    |   11 +
 sysdeps/ieee754/ldbl-128/e_hypotl.c |   11 +
 sysdeps/ieee754/ldbl-96/e_hypotl.c  |   11 +
 7 files changed, 1916 insertions(+), 682 deletions(-)

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[Bug math/16330] hypot spurious underflows with subnormal arguments

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=16330

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Fixed for 2.19.

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[Bug math/16330] hypot spurious underflows with subnormal arguments

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16330

Florian Weimer <fweimer at redhat dot com> changed:

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

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