[Bug math/16351] asin missing underflows

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https://sourceware.org/bugzilla/show_bug.cgi?id=16351

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ec0ce0d3be4ae21add09139c705852ed8bb114c7

commit ec0ce0d3be4ae21add09139c705852ed8bb114c7
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Feb 26 17:18:54 2015 +0000

    Fix asin missing underflows (bug 16351).

    Similar to various other bugs in this area, some asin 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, powerpc and mips64.

        [BZ #16351]
        * sysdeps/i386/fpu/e_asin.S (dbl_min): New object.
        (MO): New macro.
        (__ieee754_asin): Force underflow exception for results with small
        absolute value.
        * sysdeps/i386/fpu/e_asinf.S (flt_min): New object.
        (MO): New macro.
        (__ieee754_asinf): Force underflow exception for results with
        small absolute value.
        * sysdeps/ieee754/dbl-64/e_asin.c: Include <float.h> and <math.h>.
        (__ieee754_asin): Force underflow exception for results with small
        absolute value.
        * sysdeps/ieee754/flt-32/e_asinf.c: Include <float.h>.
        (__ieee754_asinf): Force underflow exception for results with
        small absolute value.
        * sysdeps/ieee754/ldbl-128/e_asinl.c: Include <float.h>.
        (__ieee754_asinl): Force underflow exception for results with
        small absolute value.
        * sysdeps/ieee754/ldbl-128ibm/e_asinl.c: Include <float.h>.
        (__ieee754_asinl): Force underflow exception for results with
        small absolute value.
        * sysdeps/ieee754/ldbl-96/e_asinl.c: Include <float.h>.
        (__ieee754_asinl): Force underflow exception for results with
        small absolute value.
        * sysdeps/x86_64/fpu/multiarch/e_asin.c [HAVE_FMA4_SUPPORT]:
        Include <math.h>.
        * math/auto-libm-test-in: Do not mark underflow exceptions as
        possibly missing for bug 16351.
        * math/auto-libm-test-out: Regenerated.

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

Summary of changes:
 ChangeLog                             |   30 +++++
 NEWS                                  |    8 +-
 math/auto-libm-test-in                |    9 +-
 math/auto-libm-test-out               |  200 ++++++++++++++++----------------
 sysdeps/i386/fpu/e_asin.S             |   34 ++++++-
 sysdeps/i386/fpu/e_asinf.S            |   34 ++++++-
 sysdeps/ieee754/dbl-64/e_asin.c       |   12 ++-
 sysdeps/ieee754/flt-32/e_asinf.c      |    6 +
 sysdeps/ieee754/ldbl-128/e_asinl.c    |    6 +
 sysdeps/ieee754/ldbl-128ibm/e_asinl.c |    6 +
 sysdeps/ieee754/ldbl-96/e_asinl.c     |    6 +
 sysdeps/x86_64/fpu/multiarch/e_asin.c |    1 +
 12 files changed, 240 insertions(+), 112 deletions(-)

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