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From: "aurelien at aurel32 dot net" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/29488] test-ibm128-llround fails on ppc64el when built
 with gcc-12 and -O2 or higher
Date: Mon, 24 Oct 2022 18:49:45 +0000
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X-Bugzilla-Product: glibc
X-Bugzilla-Component: math
X-Bugzilla-Version: 2.37
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29488

Aurelien Jarno <aurelien at aurel32 dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
            Version|2.36                        |2.37
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |aurelien at aurel32 dot net

--- Comment #6 from Aurelien Jarno <aurelien at aurel32 dot net> ---
Fixed in 2.37 by the following commit:

commit 2b5478569e72ee4820a6e163d306690c9c0eaf5e
Author: Aurelien Jarno <aurelien@aurel32.net>
Date:   Mon Oct 10 00:39:33 2022 +0200

    Avoid undefined behaviour in ibm128 implementation of llroundl (BZ #294=
88)

    Detecting an overflow edge case depended on signed overflow of a long
    long. Replace the additions and the overflow checks by
    __builtin_add_overflow().

    Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

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