From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 97266 invoked by alias); 24 Nov 2015 14:18:32 -0000 Mailing-List: contact gsl-discuss-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gsl-discuss-owner@sourceware.org Received: (qmail 97156 invoked by uid 89); 24 Nov 2015 14:18:31 -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,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,RP_MATCHES_RCVD,SPF_PASS autolearn=ham version=3.3.2 X-HELO: COL004-OMC2S7.hotmail.com Received: from col004-omc2s7.hotmail.com (HELO COL004-OMC2S7.hotmail.com) (65.55.34.81) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-SHA256 encrypted) ESMTPS; Tue, 24 Nov 2015 14:18:25 +0000 Received: from na01-bl2-obe.outbound.protection.outlook.com ([65.55.34.73]) by COL004-OMC2S7.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Tue, 24 Nov 2015 06:18:24 -0800 Received: from BLUPR16MB0196.namprd16.prod.outlook.com (10.162.233.158) by BLUPR16MB0194.namprd16.prod.outlook.com (10.162.233.156) with Microsoft SMTP Server (TLS) id 15.1.331.20; Tue, 24 Nov 2015 14:18:22 +0000 Received: from BLUPR16MB0196.namprd16.prod.outlook.com ([10.162.233.158]) by BLUPR16MB0196.namprd16.prod.outlook.com ([10.162.233.158]) with mapi id 15.01.0331.019; Tue, 24 Nov 2015 14:18:22 +0000 From: Bill Maier To: "gsl-discuss@sourceware.org" Subject: Multiprecision arithmetic Date: Tue, 24 Nov 2015 14:18:00 -0000 Message-ID: authentication-results: sourceware.org; dkim=none (message not signed) header.d=none;sourceware.org; dmarc=none action=none header.from=hotmail.com; x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [YacrfapN3GR6D4jrRY3YV16puAoCungN] x-microsoft-exchange-diagnostics: 1;BLUPR16MB0194;23:qa6t4w7QtbmtdQCFlVyxZrFkKD7+iKwjCR2CGFfpk3qpt0g5zMJXrzs9K9e4Keo8lcNRnkdeEjGucVdbRurQ3JsajKTg6rnByXH6ggL2Ds22ePEORyj/HF07OBFyWdRposy9u+R15699FK+sHxVm+xKcljBvb5eVfFyznkqOFrnIYVZzSvq7352BpGLFvoVyKMW2i1D38AmGTmT5mu0W1g==;5:a4+QFcdyN8Hqd4sulWu51jNVg2p3tdYK/Ks8iDdlKhFRAhVEK6qLn1bsTHl0Tf39Zpt34ECdsCe5+84wuXQDDex5uEjROTf1Q9qeac0jRuHUCHILWHCTYANnju3gmnMKRLqQ+Wy0uOxGYzfcE8CROA==;24:o3L6KpcOl5SBJRdUHdORogK3thYFcqiQP0VevGO+ug891Ulv7TBXr6Qhpi9z53GXZW6ma6kpYufLgs/o4vX1sjDV6avRqIVILvcFoi3Zd1w= x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BLUPR16MB0194; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(432015012)(81415001)(82015046);SRVR:BLUPR16MB0194;BCL:0;PCL:0;RULEID:;SRVR:BLUPR16MB0194; x-forefront-prvs: 0770F75EA9 x-forefront-antispam-report: SFV:NSPM;SFS:(7070004)(98900002);DIR:OUT;SFP:1901;SCL:1;SRVR:BLUPR16MB0194;H:BLUPR16MB0196.namprd16.prod.outlook.com;FPR:;SPF:None;LANG:en; spamdiagnosticoutput: 1:23 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: sct-15-1-318-15-msonline-outlook-a6494.templateTenant X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Nov 2015 14:18:22.2484 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR16MB0194 X-SW-Source: 2015-q4/txt/msg00014.txt.bz2 I notice than in the write-up for bug #45746 it is suggested that multiprec= ision arithmetic be used in a portion of the calculation to produce a more precise result. Is this something that would be considered in GSL? I did a search through the code for mpfr or gmp and did not find either. In fact I couldn'= t find any code where multiprecision arithmetic is currently being used. Is it GSL policy to keep all internal calculations in double precision? -Bill Maier