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 62F24C3A59C for ; Fri, 16 Aug 2019 17:01:18 +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 396442086C for ; Fri, 16 Aug 2019 17:01:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 396442086C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58650 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hyfbJ-000168-7n for qemu-devel@archiver.kernel.org; Fri, 16 Aug 2019 13:01:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48029) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hyfaJ-0000Y1-QJ for qemu-devel@nongnu.org; Fri, 16 Aug 2019 13:00:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hyfaI-0001Eo-Cv for qemu-devel@nongnu.org; Fri, 16 Aug 2019 13:00:15 -0400 Received: from indium.canonical.com ([91.189.90.7]:51056) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hyfaI-0001EB-7L for qemu-devel@nongnu.org; Fri, 16 Aug 2019 13:00:14 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1hyfaH-0000Bc-0n for ; Fri, 16 Aug 2019 17:00:13 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 901F22E80CB for ; Fri, 16 Aug 2019 17:00:12 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 16 Aug 2019 16:46:06 -0000 From: Arno Wagner <645662@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Confirmed; 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: arno-wagner pmaydell th-huth wagner-tansi X-Launchpad-Bug-Reporter: Arno Wagner (wagner-tansi) X-Launchpad-Bug-Modifier: Arno Wagner (arno-wagner) References: <20100923002702.20683.97345.malonedeb@soybean.canonical.com> <156596438916.26483.10355280680334978106.malone@soybean.canonical.com> Message-Id: <20190816164606.GA3850@tansi.org> 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="19022"; Instance="launchpad-lazr.conf" X-Launchpad-Hash: 70013caf4f25226de1f38d0c8d8244e8fe42d2a4 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 91.189.90.7 Subject: Re: [Qemu-devel] [Bug 645662] Re: QEMU x87 emulation of trig and other complex ops is only at 64-bit precision, not 80-bit 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 645662 <645662@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Fine by me. I suggest to keep tracking this though, if necessary in another bug item. Regards, Arno On Fri, Aug 16, 2019 at 16:06:29 CEST, Peter Maydell wrote: > Looking at our code we're still implementing the x87 insns FSIN, FCOS, > FSINCOS, FPTAN, FPATAN, F2XM1, FYL2X, FYL2XP1 by "convert the floatx80 > to a host double and use the host C library functions", so I think this > bug is still unfixed. If the C program in comment 1 and/or the Python > code has stopped reporting failures it's probably just because the guest > C library routines have stopped using the x87 80-bit FPU instructions > internally. > = > = > ** Changed in: qemu > Status: Fix Released =3D> Confirmed > = > -- = > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/645662 > = > Title: > QEMU x87 emulation of trig and other complex ops is only at 64-bit > precision, not 80-bit > = > Status in QEMU: > Confirmed > = > Bug description: > When doing the regression tests for Python 3.1.2 with Qemu 0.12.5, (Lin= ux version 2.6.26-2-686 (Debian 2.6.26-25lenny1)), > gcc (Debian 4.3.2-1.1) 4.3.2, Python compiled from sources within qemu, > 3 math tests fail, apparently because the floating point unit is buggy.= Qmeu was compiled from original sources > on Debian Lenny with kernel 2.6.34.6 from kernel.org, gcc (Debian 4.3= .2-1.1) 4.3. = > = > Regression testing errors: > = > test_cmath > test test_cmath failed -- Traceback (most recent call last): > File "/root/tools/python3/Python-3.1.2/Lib/test/test_cmath.py", line = 364, in > self.fail(error_message) > AssertionError: acos0034: acos(complex(-1.0000000000000002, 0.0)) > Expected: complex(3.141592653589793, -2.1073424255447014e-08) > Received: complex(3.141592653589793, -2.1073424338879928e-08) > Received value insufficiently close to expected value. > = > = > test_float > test test_float failed -- Traceback (most recent call last): > File "/root/tools/python3/Python-3.1.2/Lib/test/test_float.py", line = 479, in > self.assertEqual(s, repr(float(s))) > AssertionError: '8.72293771110361e+25' !=3D '8.722937711103609e+25' > = > = > test_math > test test_math failed -- multiple errors occurred; run in verbose mode = for deta > = > =3D> > = > runtests.sh -v test_math > = > le01:~/tools/python3/Python-3.1.2# ./runtests.sh -v test_math > test_math BAD > 1 BAD > 0 GOOD > 0 SKIPPED > 1 total > le01:~/tools/python3/Python-3.1.2# > = > To manage notifications about this bug go to: > https://bugs.launchpad.net/qemu/+bug/645662/+subscriptions -- = Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@wagner.name GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- A good decision is based on knowledge and not on numbers. -- Plato If it's in the news, don't worry about it. The very definition of = "news" is "something that hardly ever happens." -- Bruce Schneier -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/645662 Title: QEMU x87 emulation of trig and other complex ops is only at 64-bit precision, not 80-bit Status in QEMU: Confirmed Bug description: When doing the regression tests for Python 3.1.2 with Qemu 0.12.5, (Linux= version 2.6.26-2-686 (Debian 2.6.26-25lenny1)), gcc (Debian 4.3.2-1.1) 4.3.2, Python compiled from sources within qemu, 3 math tests fail, apparently because the floating point unit is buggy. Q= meu was compiled from original sources on Debian Lenny with kernel 2.6.34.6 from kernel.org, gcc (Debian 4.3.2= -1.1) 4.3. = Regression testing errors: test_cmath test test_cmath failed -- Traceback (most recent call last): File "/root/tools/python3/Python-3.1.2/Lib/test/test_cmath.py", line 36= 4, in self.fail(error_message) AssertionError: acos0034: acos(complex(-1.0000000000000002, 0.0)) Expected: complex(3.141592653589793, -2.1073424255447014e-08) Received: complex(3.141592653589793, -2.1073424338879928e-08) Received value insufficiently close to expected value. = test_float test test_float failed -- Traceback (most recent call last): File "/root/tools/python3/Python-3.1.2/Lib/test/test_float.py", line 47= 9, in self.assertEqual(s, repr(float(s))) AssertionError: '8.72293771110361e+25' !=3D '8.722937711103609e+25' = test_math test test_math failed -- multiple errors occurred; run in verbose mode fo= r deta =3D> runtests.sh -v test_math le01:~/tools/python3/Python-3.1.2# ./runtests.sh -v test_math test_math BAD 1 BAD 0 GOOD 0 SKIPPED 1 total le01:~/tools/python3/Python-3.1.2# To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/645662/+subscriptions