[Bug math/20213] asin (sNaN) returns sNaN

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https://sourceware.org/bugzilla/show_bug.cgi?id=20213

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3d8b06bc6108aa20a6591f52e7d9cbbd63c20e0a

commit 3d8b06bc6108aa20a6591f52e7d9cbbd63c20e0a
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon Jun 6 22:21:11 2016 +0000

    Fix dbl-64 asin (sNaN) (bug 20213).

    The dbl-64 version of asin returns sNaN for sNaN arguments.  This
    patch fixes it to add NaN arguments to themselves so that qNaN is
    returned in this case.

    Tested for x86_64 and x86.

        [BZ #20213]
        * sysdeps/ieee754/dbl-64/e_asin.c (__ieee754_asin): Add NaN
        argument to itself.
        * math/libm-test.inc (asin_test_data): Add sNaN tests.

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

Summary of changes:
 ChangeLog                       |    7 +++++++
 math/libm-test.inc              |    2 ++
 sysdeps/ieee754/dbl-64/e_asin.c |    2 +-
 3 files changed, 10 insertions(+), 1 deletions(-)

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