[Bug math/6799] nextafter() and nexttoward() doen't set errno on overflow/underflow errors

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=6799

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=85422c2acba83852396c9d9fd22ff0493e3606fe

commit 85422c2acba83852396c9d9fd22ff0493e3606fe
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon Nov 2 18:54:19 2015 +0000

    Make nextafter, nexttoward set errno (bug 6799).

    nextafter and nexttoward fail to set errno on overflow and underflow.
    This patch makes them do so in cases that should include all the cases
    where such errno setting is required by glibc's goals for when to set
    errno (but not all cases of underflow where the result is nonzero and
    so glibc's goals do not require errno setting).

    Tested for x86_64, x86, mips64 and powerpc.

        [BZ #6799]
        * math/s_nextafter.c: Include <errno.h>.
        (__nextafter): Set errno on overflow and underflow.
        * math/s_nexttowardf.c: Include <errno.h>.
        (__nexttowardf): Set errno on overflow and underflow.
        * sysdeps/i386/fpu/s_nextafterl.c: Include <errno.h>.
        (__nextafterl): Set errno on overflow and underflow.
        * sysdeps/i386/fpu/s_nexttoward.c: Include <errno.h>.
        (__nexttoward): Set errno on overflow and underflow.
        * sysdeps/i386/fpu/s_nexttowardf.c: Include <errno.h>.
        (__nexttowardf): Set errno on overflow and underflow.
        * sysdeps/ieee754/flt-32/s_nextafterf.c: Include <errno.h>.
        (__nextafterf): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-128/s_nextafterl.c: Include <errno.h>.
        (__nextafterl): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-128/s_nexttoward.c: Include <errno.h>.
        (__nexttoward): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-128/s_nexttowardf.c: Include <errno.h>.
        (__nexttowardf): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c: Include <errno.h>.
        (__nextafterl): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c: Include <errno.h>.
        (__nexttoward): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c: Include <errno.h>.
        (__nexttowardf): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-96/s_nexttoward.c: Include <errno.h>.
        (__nexttoward): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-96/s_nexttowardf.c: Include <errno.h>.
        (__nexttowardf): Set errno on overflow and underflow.
        * sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c: Include <errno.h>.
        (__nldbl_nexttowardf): Set errno on overflow and underflow.
        * sysdeps/m68k/m680x0/fpu/s_nextafterl.c: Include <errno.h>.
        (__nextafterl): Set errno on overflow and underflow.
        * math/libm-test.inc (nextafter_test_data): Do not allow errno
        setting to be missing on overflow.  Add more tests.
        (nexttoward_test_data): Likewise.

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

Summary of changes:
 ChangeLog                                   |   37 +++++++++++++++++++++++++++
 NEWS                                        |    2 +-
 math/libm-test.inc                          |   20 ++++++++++----
 math/s_nextafter.c                          |    3 ++
 math/s_nexttowardf.c                        |    3 ++
 sysdeps/i386/fpu/s_nextafterl.c             |    3 ++
 sysdeps/i386/fpu/s_nexttoward.c             |    3 ++
 sysdeps/i386/fpu/s_nexttowardf.c            |    3 ++
 sysdeps/ieee754/flt-32/s_nextafterf.c       |    3 ++
 sysdeps/ieee754/ldbl-128/s_nextafterl.c     |    3 ++
 sysdeps/ieee754/ldbl-128/s_nexttoward.c     |    3 ++
 sysdeps/ieee754/ldbl-128/s_nexttowardf.c    |    3 ++
 sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c  |    5 +++
 sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c  |    3 ++
 sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c |    3 ++
 sysdeps/ieee754/ldbl-96/s_nexttoward.c      |    3 ++
 sysdeps/ieee754/ldbl-96/s_nexttowardf.c     |    3 ++
 sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c   |    3 ++
 sysdeps/m68k/m680x0/fpu/s_nextafterl.c      |    3 ++
 19 files changed, 102 insertions(+), 7 deletions(-)

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