From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 81240 invoked by alias); 13 Aug 2018 20:27:53 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 80217 invoked by uid 89); 13 Aug 2018 20:27:53 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=AWL,BAYES_00,KAM_NUMSUBJECT,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=Hx-languages-length:949, Hx-spam-relays-external:ESMTPA X-HELO: vsmx011.vodafonemail.xion.oxcs.net Received: from Unknown (HELO vsmx011.vodafonemail.xion.oxcs.net) (153.92.174.89) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 13 Aug 2018 20:27:51 +0000 Received: from vsmx003.vodafonemail.xion.oxcs.net (unknown [192.168.75.197]) by mta-5-out.mta.xion.oxcs.net (Postfix) with ESMTP id 222D53E0418 for ; Mon, 13 Aug 2018 20:27:43 +0000 (UTC) Received: from Gertrud (unknown [87.185.210.65]) by mta-7-out.mta.xion.oxcs.net (Postfix) with ESMTPA id F32913008B9 for ; Mon, 13 Aug 2018 20:27:40 +0000 (UTC) From: Achim Gratz To: cygwin@cygwin.com Subject: Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.11.0-0.1 References: Date: Mon, 13 Aug 2018 20:27:00 -0000 In-Reply-To: (Houder's message of "Fri, 10 Aug 2018 13:05:35 +0200") Message-ID: <87zhxq107b.fsf@Rainer.invalid> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SW-Source: 2018-08/txt/msg00153.txt.bz2 Houder writes: > from: > const int xxx = 0x3d; // FE_ALL_EXCEPT on Linux, i.e. the denormal-operand > // exception is excluded on Linux > > to: > const int xxx = 0x3f; // Cygwin allows the denormal-operand exception; > // Linux (Andreas Jaeger) does not. > // This exception is not defined by the IEEE 754 > // standard (Floating-Point Arithmetic) > > (denormal-operand = input of a subnormal value) Linux supports a range of hardware where denormals are not supported or a major performance hit. Windows should be only supported on hardware where this problem doesn't exist. That said, numerical software that relies on correct denormals is really rare and following Linux might be a good idea. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ Factory and User Sound Singles for Waldorf rackAttack: http://Synth.Stromeko.net/Downloads.html#WaldorfSounds -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple