From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.76.21]) by sourceware.org (Postfix) with ESMTPS id 994903858D20 for ; Fri, 21 Apr 2023 22:53:29 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 994903858D20 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=troutmask.apl.washington.edu Authentication-Results: sourceware.org; spf=none smtp.mailfrom=troutmask.apl.washington.edu Received: from troutmask.apl.washington.edu (localhost [127.0.0.1]) by troutmask.apl.washington.edu (8.17.1/8.17.1) with ESMTPS id 33LMrR5h052895 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Fri, 21 Apr 2023 15:53:27 -0700 (PDT) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.17.1/8.17.1/Submit) id 33LMrQlc052894; Fri, 21 Apr 2023 15:53:26 -0700 (PDT) (envelope-from sgk) Date: Fri, 21 Apr 2023 15:53:26 -0700 From: Steve Kargl To: "Jorge D'Elia" Cc: Gfortran List Subject: Re: coarrays using extended precision (80 bits) ? Message-ID: Reply-To: sgk@troutmask.apl.washington.edu References: <328135304.91027.1682076811330.JavaMail.zimbra@santafe-conicet.gov.ar> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <328135304.91027.1682076811330.JavaMail.zimbra@santafe-conicet.gov.ar> X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,KAM_DMARC_STATUS,KAM_LAZY_DOMAIN_SECURITY,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Fri, Apr 21, 2023 at 08:33:31AM -0300, Jorge D'Elia wrote: > Dear GFortran developers, > > One question: is there any chance of encoding with coarrays using > extended precision (80 bits) at least inside a multicore computer? > (as if to simplify a bit). > > To date, the possibility of using double precision (64 bits) or > extended precision (80 bits) is an alternative in our production > code, but sometimes we would like to do computations in > 80 bits and, in certain parts, there are coarrays. > We have validated even in quadruple precision (128 bits), using > ifort although, as is well known, the CPU times are largely > excessive. > > Thanks in any case. > Well, I just installed OpenCoarray and downloaded a pi/4 monte carlo code that Thomas wrote using REAL. I changed everything to use REAL(10). Compiled and executed without a problem. I also tested REAL(16), which worked although it's painfully slow due to software floating point. So, I guess I don't understand what you're asking? -- Steve