From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 73226 invoked by alias); 10 Aug 2018 12:43:52 -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 73217 invoked by uid 89); 10 Aug 2018 12:43:51 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-1.5 required=5.0 tests=AWL,BAYES_00,KAM_NUMSUBJECT,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.2 spammy=H*F:D*nl, H*M:smtp, objections X-HELO: lb3-smtp-cloud8.xs4all.net Received: from lb3-smtp-cloud8.xs4all.net (HELO lb3-smtp-cloud8.xs4all.net) (194.109.24.29) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 10 Aug 2018 12:43:49 +0000 Received: from tmp.hgMw9rBrys ([83.162.234.136]) by smtp-cloud8.xs4all.net with ESMTPSA id o6ldfvuVIoj71o6lff34EB; Fri, 10 Aug 2018 14:43:47 +0200 Date: Fri, 10 Aug 2018 12:43:00 -0000 Message-ID: <57b3092a9b5027be5f14e59c305200bc@smtp-cloud8.xs4all.net> From: Houder Reply-To: cygwin@cygwin.com To: cygwin@cygwin.com Subject: Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.11.0-0.1 References: <20180810114254.GA25560@calimero.vinschen.de> In-Reply-to: <20180810114254.GA25560@calimero.vinschen.de> Content-Type: text/plain; charset=UTF-8; format=fixed User-Agent: mua.awk 0.99 X-SW-Source: 2018-08/txt/msg00121.txt.bz2 On Fri, 10 Aug 2018 13:42:54, Corinna Vinschen wrote: [snip] > > Note: the following line must be changed in STC-FENV.c (the STC that was > > attached to the bug report -- the last one above). > > > > from: > > const int xxx =3D 0x3d; // FE_ALL_EXCEPT on Linux, i.e. the denormal-... > > // exception is excluded on Linux > > > > to: > > const int xxx =3D 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) > > Shall we change that? A patch would be nice. ;) That is possible ... As on Linux, the denormal-operand exception will always be masked after this change ... (both in the default env. and in the "nomask" env.) Meaning that, after this change, this exception can * no longer * be enabled through the API of fenv.h Objections? Anyone? The modication would require changing: winsup/cygwin/fenv.cc (_feinitialise() ) winsup/cygwin/include/fenv.h (FE_ALL_EXCEPT) /usr/include/fenv.h (which is a copy of the above, I am guessing ?????) In _feinitialise() this line must be changed: from: 434 mxcsr = FE_ALL_EXCEPT << FE_SSE_EXCEPT_MASK_SHIFT; to: 434 mxcsr = 0x3f << FE_SSE_EXCEPT_MASK_SHIFT; Regards, Henri -- 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