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[Bug math/20232] [ldbl-128] expm1l (sNaN) returns sNaN


https://sourceware.org/bugzilla/show_bug.cgi?id=20232

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=59e53a78985be92134f126c5597d15a9998001d1

commit 59e53a78985be92134f126c5597d15a9998001d1
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Jun 9 17:23:51 2016 +0000

    Fix ldbl-128 expm1l (sNaN) (bug 20232).

    The ldbl-128 version of expm1l returns sNaN for sNaN input.  This
    patch fixes it to add such inputs to themselves so that qNaN is
    returned in this case.

    Tested for mips64.

        [BZ #20232]
        * sysdeps/ieee754/ldbl-128/s_expm1l.c (__expm1l): Add NaN input to
        itself.

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

Summary of changes:
 ChangeLog                           |    6 ++++++
 sysdeps/ieee754/ldbl-128/s_expm1l.c |    4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

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