From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 103356 invoked by alias); 27 Apr 2016 14:44:24 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Received: (qmail 103270 invoked by uid 89); 27 Apr 2016 14:44:23 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.8 required=5.0 tests=AWL,BAYES_00,SPF_PASS autolearn=ham version=3.3.2 spammy= X-HELO: eu-smtp-delivery-143.mimecast.com Received: from eu-smtp-delivery-143.mimecast.com (HELO eu-smtp-delivery-143.mimecast.com) (146.101.78.143) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 27 Apr 2016 14:44:13 +0000 Received: from emea01-db3-obe.outbound.protection.outlook.com (mail-db3lrp0083.outbound.protection.outlook.com [213.199.154.83]) (Using TLS) by eu-smtp-1.mimecast.com with ESMTP id uk-mta-21-096JVOosTn2XIa7nDaXeew-1; Wed, 27 Apr 2016 15:44:06 +0100 Received: from AM3PR08MB0088.eurprd08.prod.outlook.com (2a01:111:e400:8847::18) by AM3PR08MB0085.eurprd08.prod.outlook.com (2a01:111:e400:8847::15) with Microsoft SMTP Server (TLS) id 15.1.477.8; Wed, 27 Apr 2016 14:44:03 +0000 Received: from AM3PR08MB0088.eurprd08.prod.outlook.com ([fe80::6049:706:c35b:46b7]) by AM3PR08MB0088.eurprd08.prod.outlook.com ([fe80::6049:706:c35b:46b7%14]) with mapi id 15.01.0477.012; Wed, 27 Apr 2016 14:44:02 +0000 From: Wilco Dijkstra To: James Greenhalgh , Evandro Menezes CC: GCC Patches , Andrew Pinski , nd Subject: Re: [AArch64] Emit division using the Newton series Date: Wed, 27 Apr 2016 14:44:00 -0000 Message-ID: References: <56EB0EDF.3060401@samsung.com> <56F2C329.10405@samsung.com> <56FDA311.7090309@samsung.com> <56FED036.2070405@samsung.com> <56FEEE90.3070707@samsung.com> <56FEFBC1.1060308@samsung.com> <5702BB44.8000907@samsung.com>,<20160427141549.GB40892@arm.com> In-Reply-To: <20160427141549.GB40892@arm.com> x-ms-office365-filtering-correlation-id: 6481ad2c-7800-46a8-4d80-08d36eaa5fef x-microsoft-exchange-diagnostics: 1;AM3PR08MB0085;5:sc1wL1+9cldGFdm/exzpEftwnEtVJY1f2sMqBg0BRzpYMW0kEOkI6tN9ikreQ3XFyHTDlK30AnbSMmFAaLF1LYQwAC0zpbi19LDqo746s/wR0IO/LJFm7i8K05Ve26vjqew5gsQSL5tRRRV9wcxWDA==;24:gi9YAgmHTcTk9HKbedIBD1Oz6wCbhjVjXytYNU4knaiTg63euzLciXrZwB84XkGEpuRnzrJ1vFECNeX+O22FBk5tBE2huPLfFk6icFcgQPc=;7:eBpogidceRoZG3asLCSnQJ0q5B4W/5QpLVnXj0Q4QWLFWlqLf/oxA1CHg4CD5zj5ZWUK0pgtdrD18VCuC/3jg2fAbM8eIjXr1ph8L9lCKrdGUXEasgclYpf6iA6PRT2xOMAk7IB3yK09qZa/gS4sxb7lZVd07uuZxiMc8X4NdZV4SZLhnOmN59GJPNXGLF9H;20:v3N9e0AB6m1HJcldf7CloVKf/HstOn7IC5fnqc+JCaedMGsNrh/EAEvTbAKPv0kcdfOWCQErMYjwCdEXKrbsqMOOUye9TDHc62AE9EyMEFkw4sxWTjAjv9vqrT7cyFb0mk9UJdAKds8MJX9KcDOtOcecVVE2UD+FOe+TGxB1m2c= x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:AM3PR08MB0085; nodisclaimer: True x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(9101521072)(601004)(2401047)(8121501046)(5005006)(10201501046)(3002001)(6055026);SRVR:AM3PR08MB0085;BCL:0;PCL:0;RULEID:;SRVR:AM3PR08MB0085; x-forefront-prvs: 0925081676 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(979002)(6009001)(24454002)(5250100002)(5008740100001)(33656002)(92566002)(106116001)(76576001)(5004730100002)(9686002)(76176999)(86362001)(50986999)(54356999)(66066001)(102836003)(1096002)(74316001)(6116002)(2900100001)(1220700001)(3846002)(3280700002)(5003600100002)(87936001)(3660700001)(189998001)(586003)(81166005)(5001770100001)(93886004)(2950100001)(2906002)(5002640100001)(4326007)(969003)(989001)(999001)(1009001)(1019001);DIR:OUT;SFP:1101;SCL:1;SRVR:AM3PR08MB0085;H:AM3PR08MB0088.eurprd08.prod.outlook.com;FPR:;SPF:None;MLV:ovrnspm;PTR:InfoNoRecords;LANG:en; spamdiagnosticoutput: 1:23 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Apr 2016 14:44:01.7385 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM3PR08MB0085 X-MC-Unique: 096JVOosTn2XIa7nDaXeew-1 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable X-SW-Source: 2016-04/txt/msg01660.txt.bz2 James Greenhalgh wrote: > So this is off for all cores currently supported by GCC? >=20 > I'm not sure I understand why we should take this if it will immediately > be dead code? I presume it was meant to have the vector variants enabled with -mcpu=3Dexy= nos-m1 as that is where you can get a good gain if you only have a single divide+s= qrt unit. The same applies to the sqrt case too, and I guess -mcpu=3Dxgene-1. Wilco