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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 E21ABCA9EC9 for ; Mon, 4 Nov 2019 22:52:15 +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 B944120663 for ; Mon, 4 Nov 2019 22:52:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B944120663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39330 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iRlCo-00024z-Tb for qemu-devel@archiver.kernel.org; Mon, 04 Nov 2019 17:52:14 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:47428) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iRlBO-0001C1-3W for qemu-devel@nongnu.org; Mon, 04 Nov 2019 17:50:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iRlBL-0006H5-Ha for qemu-devel@nongnu.org; Mon, 04 Nov 2019 17:50:45 -0500 Received: from indium.canonical.com ([91.189.90.7]:37490) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iRlBL-0006Fr-Au for qemu-devel@nongnu.org; Mon, 04 Nov 2019 17:50:43 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1iRlBJ-0008RS-A5 for ; Mon, 04 Nov 2019 22:50:41 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 389AA2E80C8 for ; Mon, 4 Nov 2019 22:50:41 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 04 Nov 2019 22:44:13 -0000 From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Invalid; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: ajbennee ldesnogu pmaydell scientes X-Launchpad-Bug-Reporter: Shawn Landden (scientes) X-Launchpad-Bug-Modifier: =?utf-8?q?Alex_Benn=C3=A9e_=28ajbennee=29?= References: <157275520880.19702.5640428141206739403.malonedeb@wampee.canonical.com> Message-Id: <157290745311.19625.16185149928630222746.malone@wampee.canonical.com> Subject: [Bug 1851095] Re: [feature request] awareness of instructions that are well emulated X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="469f241f4e73cc0bdffa4e30654052a2af068e06"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: 58548b6711e7cb59c556b6aa24d5310afa15adc4 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 91.189.90.7 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1851095 <1851095@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" I can confirm bench_simple gives the same result on both qemu-arm and my aarch32 hardware. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1851095 Title: [feature request] awareness of instructions that are well emulated Status in QEMU: Invalid Bug description: While qemu's scalar emulation tends to be excellent, qemu's SIMD emulation tends to be incorrect (except for arm64 from x86_64)--i have found this both for mipsel and arm32. Until these code paths are audited, which is probably a large job, it would be nice if qemu knew its emulation of this class of instructions was not very good, and thus it would give up on finding these instructions if a "careful" operation is passed. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1851095/+subscriptions