[Bug math/19156] [ldbl-128] j0l spurious underflows

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=19156

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0a90a8f2b9af6dd226558df5d3825e0e9ccd4ce3

commit 0a90a8f2b9af6dd226558df5d3825e0e9ccd4ce3
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Oct 21 16:40:20 2015 +0000

    Fix ldbl-128 j0l spurious underflows (bug 19156).

    My recent addition of more tests for j0 showed up that the ldbl-128
    implementation of j0l produces spurious underflow exceptions for
    arguments close to 0 (when the result is very close to 1).  This patch
    fixes this by just returning the argument in that case.

    Tested for mips64 (where it fixes the recently-added tests that were
    previously failing).

        [BZ #19156]
        * sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_j0l): Return 1 for
        arguments very close to 0.

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Summary of changes:
 ChangeLog                        |    6 ++++++
 NEWS                             |    2 +-
 sysdeps/ieee754/ldbl-128/e_j0l.c |    2 ++
 3 files changed, 9 insertions(+), 1 deletions(-)

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