From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=BAYES_00,FORGED_HOTMAIL_RCVD2, FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,81bb2ce65a3240c3 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Received: by 10.68.223.73 with SMTP id qs9mr1155727pbc.7.1342073043446; Wed, 11 Jul 2012 23:04:03 -0700 (PDT) Path: l9ni11511pbj.0!nntp.google.com!news1.google.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail From: =?ISO-8859-1?Q?Egil_H=F8vik?= Newsgroups: comp.lang.ada Subject: Re: What would you like in Ada202X? Date: Wed, 11 Jul 2012 23:02:43 -0700 (PDT) Organization: http://groups.google.com Message-ID: References: <3637793.35.1335340026327.JavaMail.geo-discussion-forums@ynfi5> <4ff312ad$0$6178$ba4acef3@reader.news.orange.fr> <4ff314d8$0$6218$ba4acef3@reader.news.orange.fr> <856acffb-1fc3-474e-b11f-f540977e945f@googlegroups.com> <0o59v7djiffnl7sqdpp2uiso78oa9hb8sb@invalid.netcom.com> NNTP-Posting-Host: 193.71.180.107 Mime-Version: 1.0 X-Trace: posting.google.com 1342073043 10569 127.0.0.1 (12 Jul 2012 06:04:03 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Thu, 12 Jul 2012 06:04:03 +0000 (UTC) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=193.71.180.107; posting-account=P68zsgoAAABKpXKMUuwuUZ_RfBk1kZfB User-Agent: G2/1.0 Content-Type: text/plain; charset=ISO-8859-1 Date: 2012-07-11T23:02:43-07:00 List-Id: On Friday, July 6, 2012 5:29:20 PM UTC+2, Simon Wright wrote: > Ada novice writes: > > > On Thursday, July 5, 2012 5:57:12 PM UTC+1, Simon Wright wrote: > > > >> One thing I _don't_ see in the SVN history is any indication of _why_ > >> this change was made. > >> > > > > Perhaps some information here: > > http://patchwork.ozlabs.org/patch/123609/ > > http://gcc.gnu.org/ml/gcc-patches/2011-08/msg02324.html > > http://gcc.gnu.org/ml/gcc-patches/2011-08/msg02408.html > > > > YC > > Thanks. The reasons, from the patch diff, ore > > +-- This version of Generic_Real_Arrays avoids the use of BLAS and LAPACK. One > +-- reason for this is new Ada 2012 requirements that prohibit algorithms such > +-- as Strassen's algorithm, which may be used by some BLAS implementations. In > +-- addition, some platforms lacked suitable compilers to compile the reference > +-- BLAS/LAPACK implementation. Finally, on many platforms there may be more > +-- floating point types than supported by BLAS/LAPACK. > There's also the fact that the BLAS/LAPACK libraries used by AdaCore in previous versions were C code generated from very old Fortran, where stack variables didn't exist, thus the C code is littered with static variables, which means a ton of issues with multithreading, and is a violation of RM A(3) -- ~egilhh