[Bug math/16526] Missing underflow exception from sincos

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https://sourceware.org/bugzilla/show_bug.cgi?id=16526

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ad39cce0da0161dba69781c53349acf2e23f156c

commit ad39cce0da0161dba69781c53349acf2e23f156c
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Jun 23 22:24:20 2015 +0000

    Fix sin, sincos missing underflows (bug 16526, bug 16538).

    Similar to various other bugs in this area, some sin and sincos
    implementations do not raise the underflow exception for subnormal
    arguments, when the result is tiny and inexact.  This patch forces the
    exception in a similar way to previous fixes.

    Tested for x86_64, x86, mips64 and powerpc.

        [BZ #16526]
        [BZ #16538]
        * sysdeps/ieee754/dbl-64/s_sin.c: Include <float.h>.
        (__sin): Force underflow exception for arguments with small
        absolute value.
        * sysdeps/ieee754/flt-32/k_sinf.c: Include <float.h>.
        (__kernel_sinf): Force underflow exception for arguments with
        small absolute value.
        * sysdeps/ieee754/ldbl-128/k_sincosl.c: Include <float.h>.
        (__kernel_sincosl): Force underflow exception for arguments with
        small absolute value.
        * sysdeps/ieee754/ldbl-128/k_sinl.c: Include <float.h>.
        (__kernel_sinl): Force underflow exception for arguments with
        small absolute value.
        * sysdeps/ieee754/ldbl-128ibm/k_sincosl.c: Include <float.h>.
        (__kernel_sincosl): Force underflow exception for arguments with
        small absolute value.
        * sysdeps/ieee754/ldbl-128ibm/k_sinl.c: Include <float.h>.
        (__kernel_sinl): Force underflow exception for arguments with
        small absolute value.
        * sysdeps/ieee754/ldbl-96/k_sinl.c: Include <float.h>.
        (__kernel_sinl): Force underflow exception for arguments with
        small absolute value.
        * sysdeps/powerpc/fpu/k_sinf.c: Include <float.h>.
        (__kernel_sinf): Force underflow exception for arguments with
        small absolute value.
        * math/auto-libm-test-in: Add more tests of sin and sincos.
        * math/auto-libm-test-out: Regenerated.

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

Summary of changes:
 ChangeLog                               |   29 ++
 NEWS                                    |   28 +-
 math/auto-libm-test-in                  |    8 +
 math/auto-libm-test-out                 |  632 +++++++++++++++++++++++++++++++
 sysdeps/ieee754/dbl-64/s_sin.c          |   10 +-
 sysdeps/ieee754/flt-32/k_sinf.c         |   11 +-
 sysdeps/ieee754/ldbl-128/k_sincosl.c    |   20 +-
 sysdeps/ieee754/ldbl-128/k_sinl.c       |   10 +-
 sysdeps/ieee754/ldbl-128ibm/k_sincosl.c |   20 +-
 sysdeps/ieee754/ldbl-128ibm/k_sinl.c    |   10 +-
 sysdeps/ieee754/ldbl-96/k_sinl.c        |   10 +-
 sysdeps/powerpc/fpu/k_sinf.c            |    6 +-
 12 files changed, 762 insertions(+), 32 deletions(-)

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