[Bug math/16539] spurious underflow exception from expm1

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https://sourceware.org/bugzilla/show_bug.cgi?id=16539

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ce9c5b3e955746a9187ffde9b16feea4a357c86a

commit ce9c5b3e955746a9187ffde9b16feea4a357c86a
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon Jun 30 17:38:16 2014 +0000

    Fix ldbl-128 expm1l spurious underflow (bug 16539).

    This patch fixes spurious underflows from ldbl-128 expm1l, as reported
    in <https://sourceware.org/ml/libc-alpha/2014-06/msg00835.html> and
    exposed by the tests added for such a bug in the x86 / x86-64
    version.  The bug and fix are essentially the same, so no separate bug
    is filed in Bugzilla.

    Tested for mips64.

        [BZ #16539]
        * sysdeps/ieee754/ldbl-128/s_expm1l.c: Include <float.h>.
        (__expm1l): Return argument unchanged when small but not
        subnormal.

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Summary of changes:
 ChangeLog                           |    5 +++++
 sysdeps/ieee754/ldbl-128/s_expm1l.c |    5 +++++
 2 files changed, 10 insertions(+), 0 deletions(-)

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