[Bug math/18699] tilegx cproj() for various complex infinities does not yield infinity

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https://sourceware.org/bugzilla/show_bug.cgi?id=18699

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=45ccb8346bba9b0f7a72a92d7f8b1c796dd496ba

commit 45ccb8346bba9b0f7a72a92d7f8b1c796dd496ba
Author: Chris Metcalf <cmetcalf@ezchip.com>
Date:   Thu Oct 22 13:36:53 2015 -0400

    Update NEWS to mention drive-by fix for bug 18699.

    Wilco fixed this tilegx bug in commit fe8c2b33aed0 ("Since we
    now inline isinf, isnan and isfinite in math.h, replace uses
    of __isinf_ns(l/f) with isinf, and remove the unused inlines
    __isinf_ns(l/f), __isnan(f) and __finite(f).")

    I verified that reverting math/s_cprojf.c back to using the
    sysdeps/ieee754/flt-32/math_private.h version of __isinf_nsf()
    instead of isinf() brings back the bug on tilegx.

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

Summary of changes:
 ChangeLog |    2 ++
 NEWS      |   15 ++++++++-------
 2 files changed, 10 insertions(+), 7 deletions(-)

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