From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11EEDC49ED7 for ; Mon, 16 Sep 2019 14:01:31 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DE3002067D for ; Mon, 16 Sep 2019 14:01:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DE3002067D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34530 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i9rZJ-0004qL-IV for qemu-devel@archiver.kernel.org; Mon, 16 Sep 2019 10:01:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45905) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i9rWh-0002qt-1e for qemu-devel@nongnu.org; Mon, 16 Sep 2019 09:58:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i9rWg-0000D6-2C for qemu-devel@nongnu.org; Mon, 16 Sep 2019 09:58:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37053) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i9rWf-0000Ck-Su; Mon, 16 Sep 2019 09:58:46 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E9BA0C054907; Mon, 16 Sep 2019 13:58:44 +0000 (UTC) Received: from t460s.redhat.com (ovpn-117-103.ams2.redhat.com [10.36.117.103]) by smtp.corp.redhat.com (Postfix) with ESMTP id CBF251018A2E; Mon, 16 Sep 2019 13:58:42 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Mon, 16 Sep 2019 15:57:43 +0200 Message-Id: <20190916135806.1269-7-david@redhat.com> In-Reply-To: <20190916135806.1269-1-david@redhat.com> References: <20190916135806.1269-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Mon, 16 Sep 2019 13:58:45 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 06/29] s390x/tcg: MVC: Use is_destructive_overlap() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Florian Weimer , Thomas Huth , David Hildenbrand , =?UTF-8?q?Dan=20Hor=C3=A1k?= , Cornelia Huck , Richard Henderson , Stefano Brivio , qemu-s390x@nongnu.org, Cole Robinson , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Let's use the new helper, that also detects destructive overlaps when wrapping. We'll make the remaining code (e.g., fast_memmove()) aware of wrapping later. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/mem_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 013e8d6045..c31cf49593 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -330,7 +330,7 @@ static uint32_t do_helper_mvc(CPUS390XState *env, uin= t32_t l, uint64_t dest, */ if (dest =3D=3D src + 1) { fast_memset(env, dest, cpu_ldub_data_ra(env, src, ra), l, ra); - } else if (dest < src || src + l <=3D dest) { + } else if (!is_destructive_overlap(env, dest, src, l)) { fast_memmove(env, dest, src, l, ra); } else { for (i =3D 0; i < l; i++) { --=20 2.21.0