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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 03560385842D for ; Wed, 1 Dec 2021 23:05:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 03560385842D 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-453-vO-DjRxzOC-uZVrj1cX31w-1; Wed, 01 Dec 2021 18:05:16 -0500 X-MC-Unique: vO-DjRxzOC-uZVrj1cX31w-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E3FD71015DA0; Wed, 1 Dec 2021 23:05:14 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.39.194.188]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7FD3A7621D; Wed, 1 Dec 2021 23:05:13 +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 1B1N5AJS1014434 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Thu, 2 Dec 2021 00:05:10 +0100 Received: (from jakub@localhost) by tucnak.zalov.cz (8.16.1/8.16.1/Submit) id 1B1N590J1014433; Thu, 2 Dec 2021 00:05:09 +0100 Date: Thu, 2 Dec 2021 00:05:09 +0100 From: Jakub Jelinek To: Thomas Koenig Cc: gcc mailing list , "fortran@gcc.gnu.org" , Segher Boessenkool , David Edelsohn Subject: Re: [power-ieee128] What should the math functions be annotated with? Message-ID: <20211201230509.GB2664@tucnak> Reply-To: Jakub Jelinek References: <119d695e-c316-ba5f-a3ed-963f18a67e35@netcologne.de> <20211201205447.GD2646553@tucnak> MIME-Version: 1.0 In-Reply-To: <20211201205447.GD2646553@tucnak> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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=-5.6 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=unavailable autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Dec 2021 23:05:23 -0000 On Wed, Dec 01, 2021 at 09:54:50PM +0100, Jakub Jelinek wrote: > sinl in C when compiled with -mabi=ieeelongdouble), but I'm not sure > if those need to be declared by libgfortran or math.h declares them). To answer this myself, just tried on Fedora 34 and we'd need to declare those ourselves. Because math.h for -mabi=ibmlongdouble (which we want to compile the libgfortran *.c files with so that REAL16 is long double as before) only has prototypes like: extern long double sinl (long double __x) __attribute__ ((__nothrow__ , __leaf__)); extern long double __sinl (long double __x) __attribute__ ((__nothrow__ , __leaf__)); and with -mabi=ieeelongdouble it has: extern long double sinl (long double __x) __asm__ ("" "__sinieee128") __attribute__ ((__nothrow__ , __leaf__)); extern long double __sinl (long double __x) __asm__ ("" "____sinieee128") __attribute__ ((__nothrow__ , __leaf__)); but in neither case there is what we actually need for libgfortran, which is extern __float128 __sinieee128 (__float128) __attribute__ ((__nothrow__, __leaf__)); Jakub