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=-2.9 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=unavailable autolearn_force=no version=3.4.4 X-Google-Thread: 103376,36b302576d78847a X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsfeed.stueberl.de!proxad.net!cleanfeed3-a.proxad.net!nnrp14-1.free.fr!not-for-mail Return-Path: Mime-Version: 1.0 (Apple Message framework v752.2) References: Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Content-Transfer-Encoding: 7bit From: Marius Amado-Alves Subject: Re: How do you bitwise operations in Ada '83 and '95 Date: Thu, 20 Jul 2006 21:41:21 +0100 To: comp.lang.ada@ada-france.org X-Mailer: Apple Mail (2.752.2) X-Antivirus-Scanner: Clean mail though you should still use an Antivirus X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - zaphen.serversonline.net X-AntiAbuse: Original Domain - ada-france.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - amado-alves.info X-Source: X-Source-Args: X-Source-Dir: X-Virus-Scanned: amavisd-new at ada-france.org X-BeenThere: comp.lang.ada@ada-france.org X-Mailman-Version: 2.1.8rc1 Precedence: list List-Id: "Gateway to the comp.lang.ada Usenet newsgroup" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.ada Message-ID: X-Leafnode-NNTP-Posting-Host: 88.191.17.134 Organization: Guest of ProXad - France NNTP-Posting-Date: 20 Jul 2006 22:45:08 MEST NNTP-Posting-Host: 88.191.14.223 X-Trace: 1153428308 nnrp14-1.free.fr 13209 88.191.14.223:58274 X-Complaints-To: abuse@proxad.net Xref: g2news2.google.com comp.lang.ada:5844 Date: 2006-07-20T22:45:08+02:00 > Surely a record rep clause, and then simple usage of its > components, is more readable, and more likely to be correct, and > even more > likely to generate optimized code, than source code littered with > complex > arithmetic expressions. Actually, in this case, no. Time needs an order relation. Implemented as a record you have to write the relation functions--and you can botch there. Implemented as a modular type the predefined relation functions are gratis--and surely correct. And the expressions are not complex. Once you get the masks and magnitudes right, it's simply Part := (Whole and Mask) / Magnitude.