From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 4E6553858D28 for ; Fri, 7 Jan 2022 21:48:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 4E6553858D28 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-492-7s1Bbt3KMgieveZli8qRvA-1; Fri, 07 Jan 2022 16:48:19 -0500 X-MC-Unique: 7s1Bbt3KMgieveZli8qRvA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4064F81CCB4; Fri, 7 Jan 2022 21:48:18 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.2.16.169]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D1F5C78DCF; Fri, 7 Jan 2022 21:48:17 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.16.1/8.16.1) with ESMTPS id 207LmEfF1072139 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 7 Jan 2022 22:48:14 +0100 Received: (from jakub@localhost) by tucnak.zalov.cz (8.16.1/8.16.1/Submit) id 207LmDlS1072138; Fri, 7 Jan 2022 22:48:13 +0100 Date: Fri, 7 Jan 2022 22:48:13 +0100 From: Jakub Jelinek To: Thomas Koenig Cc: Michael Meissner , Segher Boessenkool , "fortran@gcc.gnu.org" , Peter Bergner , gcc-patches@gcc.gnu.org, Bill Schmidt , David Edelsohn Subject: Re: [power-ieee128] OPEN CONV Message-ID: <20220107214813.GR2646553@tucnak> Reply-To: Jakub Jelinek References: <20220103200026.GW2646553@tucnak> <1bd479f6-2ea6-a19d-b8e5-69d3cac7ca98@netcologne.de> <20220104110749.GC2646553@tucnak> <20220107092202.GE2646553@tucnak> <28f0a876-7281-936d-f727-cb7067c052f9@netcologne.de> <20220107195220.GP2646553@tucnak> <332da363-1c64-e1bf-a05a-d412c600f580@netcologne.de> MIME-Version: 1.0 In-Reply-To: <332da363-1c64-e1bf-a05a-d412c600f580@netcologne.de> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: fortran@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Fortran mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 Jan 2022 21:48:22 -0000 On Fri, Jan 07, 2022 at 10:40:50PM +0100, Thomas Koenig wrote: > One thing that one has to watch out for is a big-endian IBM long double > file, so the byte swapping will have to be done before assigning > the value. I've tried to handle that right, i.e. on unformatted read with byte-swapping and r16 <-> r17 conversions first do byte-swapping and then r16 <-> r17 conversions, while for unformatted writes first r16 <-> r17 conversions and then byte-swapping. Jakub