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Subject: [Bug target/58684] powerpc uses only unordered floating-point
 compares
Date: Sun, 28 Apr 2024 07:42:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D58684

--- Comment #11 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Alexandre Oliva <aoliva@gcc.gnu.org>:

https://gcc.gnu.org/g:6e95dca31c6b4688e0f0a25c9c3aa8a0bedc9056

commit r15-20-g6e95dca31c6b4688e0f0a25c9c3aa8a0bedc9056
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Sun Apr 28 04:30:24 2024 -0300

    xfail fetestexcept test - ppc always uses fcmpu

    gcc.dg/torture/pr91323.c tests that a compare with NaNf doesn't set an
    exception using builtin compare intrinsics, and that it does when
    using regular compare operators.

    That doesn't seem to be expected to work on powerpc targets.  It fails
    on GNU/Linux, it's marked to be skipped on AIX, and a similar test,
    gcc.dg/torture/pr93133.c, has the execution test xfailed for all of
    powerpc*-*-*.

    In this test, the functions that use intrinsics for the compare end up
    with the same code as the one that uses compare operators, using
    fcmpu, a floating compare that, unlike fcmpo, does not set the invalid
    operand exception for quiet NaN.  I couldn't find any evidence that
    the rs6000 backend ever outputs fcmpo.  Therefore, I'm adding the same
    execution xfail marker to this test.


    for  gcc/testsuite/ChangeLog

            PR target/58684
            * gcc.dg/torture/pr91323.c: Expect execution fail on
            powerpc*-*-*.=