From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 732F93858D28; Sat,  4 Dec 2021 00:05:18 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 732F93858D28
From: "goldstein.w.n at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/28646] [2.35 Regression] mock -r fedora-36-x86_64
 /tmp/java-1.8.0-openjdk-1.8.0.312.b07-2.fc36.src.rpm& fails to build
Date: Sat, 04 Dec 2021 00:05:18 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: string
X-Bugzilla-Version: 2.35
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: goldstein.w.n at gmail dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-28646-131-pqjzRyPmip@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-28646-131@http.sourceware.org/bugzilla/>
References: <bug-28646-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: glibc-bugs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Glibc-bugs mailing list <glibc-bugs.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/glibc-bugs/>
List-Help: <mailto:glibc-bugs-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Sat, 04 Dec 2021 00:05:18 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D28646

--- Comment #6 from Noah Goldstein <goldstein.w.n at gmail dot com> ---
(In reply to H.J. Lu from comment #5)
> Created attachment 13815 [details]
> A patch to add a testcase
>=20
> On AVX512 machines, I got
>=20
> [hjl@gnu-tgl-3 build-x86_64-linux]$ string/test-strcmp --direct
> string/test-strcmp: Wrong result in function __strcmp_evex 0 1
>                        	simple_strcmp	stupid_strcmp	__strcmp_avx2
> __strcmp_evex	__strcmp_sse42	__strcmp_ssse3	__strcmp_sse2_unaligned
> __strcmp_sse2
> [hjl@gnu-tgl-3 build-x86_64-linux]$=20
>=20
> Noah, any ideas?

Looks to me that coming from:

L(cross_page_loop)
L(main_loop_header)

The number of iterations for the 4x VEC_SIZE loop is being miscomputed.

Still figuring out exactly whats going on though.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=