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=-4.0 required=3.0 tests=BAYES_00, 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 E8351C433E3 for ; Mon, 13 Jul 2020 10:02:24 +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 B2CE82068F for ; Mon, 13 Jul 2020 10:02:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B2CE82068F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47528 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1juvHz-0000wR-VZ for qemu-devel@archiver.kernel.org; Mon, 13 Jul 2020 06:02:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42176) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1juvH2-0000Vs-5h for qemu-devel@nongnu.org; Mon, 13 Jul 2020 06:01:24 -0400 Received: from mx2.suse.de ([195.135.220.15]:49510) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1juvGv-0003M1-UW for qemu-devel@nongnu.org; Mon, 13 Jul 2020 06:01:23 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id A153CAE39; Mon, 13 Jul 2020 10:01:16 +0000 (UTC) From: Andreas Schwab To: Laurent Vivier Subject: Re: [PATCH 1/2] softfloat: m68k: infinity is a valid encoding References: <1588094279-17913-1-git-send-email-frederic.konrad@adacore.com> <1588094279-17913-2-git-send-email-frederic.konrad@adacore.com> <55a6feb0-38ba-432f-82cb-06c5694c325a@vivier.eu> X-Yow: .. My vaseline is RUNNING... Date: Mon, 13 Jul 2020 12:01:14 +0200 In-Reply-To: <55a6feb0-38ba-432f-82cb-06c5694c325a@vivier.eu> (Laurent Vivier's message of "Wed, 29 Apr 2020 10:42:20 +0200") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.91 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=195.135.220.15; envelope-from=schwab@suse.de; helo=mx2.suse.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/13 00:02:19 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x (no timestamps) [generic] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: Peter Maydell , philmd@redhat.com, qemu-devel@nongnu.org, KONRAD Frederic , Pierre Muller , alex.bennee@linaro.org, Aurelien Jarno Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Apr 29 2020, Laurent Vivier wrote: > "Since the extended-precision data format has an explicit integer bit, a > number can be formatted with a nonzero exponent, less than the maximum > value, and a zero integer bit. The IEEE 754 standard does not define a > zero integer bit. Such a number is an unnormalized number. Hardware does > not directly support denormalized and unnormalized numbers, but > implicitly supports them by trapping them as unimplemented data types, > allowing efficient conversion in software." This is supposed to be handled transparently by fpsp040, to be compatible with the 68881. Andreas. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."