[Bug math/19032] [i386] acosh (-qNaN) spurious "invalid" exception

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https://sourceware.org/bugzilla/show_bug.cgi?id=19032

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=93e448cbed1095c88133f2a304b1bbba72e480af

commit 93e448cbed1095c88133f2a304b1bbba72e480af
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Sep 30 18:06:02 2015 +0000

    Improve test coverage of real libm functions [a-e]*.

    This patch improves test coverage of the real libm functions [a-e]*,
    ensuring that special cases and ranges of input values of potential
    significance (such as close to overflow and underflow thresholds) are
    more systematically covered.

    This is a followup to
    <https://sourceware.org/ml/libc-alpha/2013-12/msg00757.html> which
    covered [a-c]* (however, I found more weaknesses in the coverage of
    those functions when preparing this patch, hence the additional tests
    being added for them here).

    Addition of a test for acosh (-qNaN) is temporarily deferred, to be
    included as part of a fix for bug 19032 which was discovered in the
    course of adding these tests (and which illustrates the use of testing
    -qNaN as well as +qNaN as input even to functions for which the sign
    of a NaN isn't meant to be significant).

    Tested for x86_64 and x86.

        * math/auto-libm-test-in: Add more tests of acos, acosh, asin,
        atan, atan2, atanh, cbrt, cos, cosh, erf, erfc, exp, exp10, exp2
        and expm1.
        * math/auto-libm-test-out: Regenerated.
        * math/libm-test.inc (acos_test_data): Add more tests.
        (asin_test_data): Likewise.
        (asinh_test_data): Likewise.
        (atan_test_data): Likewise.
        (atanh_test_data): Likewise.
        (atan2_test_data): Likewise.
        (cbrt_test_data): Likewise.
        (ceil_test_data): Likewise.
        (copysign_test_data): Likewise.
        (cos_test_data): Likewise.
        (cosh_test_data): Likewise.
        (erf_test_data): Likewise.
        (erfc_test_data): Likewise.
        (exp_test_data): Likewise.
        (exp10_test_data): Likewise.
        (exp2_test_data): Likewise.
        (expm1_test_data): Likewise.
        * sysdeps/x86_64/fpu/libm-test-ulps: Update.

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

Summary of changes:
 ChangeLog                         |   25 +
 math/auto-libm-test-in            |  290 +
 math/auto-libm-test-out           |18454 +++++++++++++++++++++++++++++++++++++
 math/libm-test.inc                |  127 +-
 sysdeps/x86_64/fpu/libm-test-ulps |    4 +-
 5 files changed, 18891 insertions(+), 9 deletions(-)

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