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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,c4cb2c432feebd9d X-Google-Thread: 1094ba,c4cb2c432feebd9d X-Google-Thread: 101deb,15c6ed4b761968e6 X-Google-Attributes: gid103376,gid1094ba,gid101deb,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news4.google.com!news.glorb.com!sn-xt-sjc-15!sn-xt-sjc-08!sn-post-sjc-02!sn-post-sjc-01!supernews.com!corp.supernews.com!not-for-mail From: "Shmuel (Seymour J.) Metz" Newsgroups: comp.lang.ada,comp.lang.fortran,comp.lang.pl1 Subject: Re: ONES COMPLEMENT (was: Ada vs Fortran for scientific applications) Date: Thu, 20 Jul 2006 18:47:37 -0300 Organization: Atid/2 Message-ID: <44c00809$1$fuzhry+tra$mr2ice@news.patriot.net> References: <0ugu4e.4i7.ln@hunter.axlog.fr> <%P_cg.155733$eR6.26337@bgtnsc04-news.ops.worldnet.att.net> <6H9dg.10258$S7.9150@news-server.bigpond.net.au> <1hfv5wb.1x4ab1tbdzk7eN%nospam@see.signature> <20060712.7A4E6E0.D028@mojaveg.lsan.sisna <20060717.7A4ADD0.10B1A@mojaveg.lsan.sisna.com> <44bceab6$29$fuzhry+tra$mr2ice@news.patriot.net> <20060719.79A3E90.87CE@mojaveg.lsan.sisna.com> <44be98a1$38$fuzhry+tra$mr2ice@news.patriot.net> <20060720.79BD230.8698@mojaveg.lsan.sisna.com> Mail-Copies-To: nobody X-CompuServe-Customer: Yes X-Coriate: interspeed.co.nz X-Ecrate: tanandtanlawyers.com X-Pose: George Cox X-Punge: Micro$oft X-Sanguinate: The MVS Guy X-Terminate: SPA(GIS) X-Tinguish: Mark Griffith X-Treme: C&C,DWS Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Newsreader: MR/2 Internet Cruiser Edition for OS/2 v2.67/60 X-Complaints-To: abuse@supernews.com Xref: g2news2.google.com comp.lang.ada:5861 comp.lang.fortran:12309 comp.lang.pl1:2076 Date: 2006-07-20T18:47:37-03:00 List-Id: In <20060720.79BD230.8698@mojaveg.lsan.sisna.com>, on 07/20/2006 at 08:46 AM, mojaveg@mojaveg.lsan.sisna.com (Everett M. Greene) said: >"Shmuel (Seymour J.) Metz" >writes: > mojaveg@mojaveg.lsan.sisna.com (Everett M. Greene) said: > >> >A subtractive adder. >> >> How so? 0+(-0) is a straight addition of 0...0 and 7...7, requiring >> no complementation. >Context was deleted so I have no idea what you're trying to say >above. Robin wrote "A properly designed 1s complement machine would not generate -0 in normal arithmetic operations." I responded "0+(-0)?". You responded "A subtractive adder." I'm trying to say that there's nothing about 0+(-0) requiring a subtractive adder. >They test for +0 in one instruction. If you want to reliably test >for zero, you have to add 0 first. >From JZ in UP-4053, UNIVAC 1108 PROCESSOR AND STORAGE: Program control is transferred to U if the (A) are all zeros or all ones. I repeat, which UNIVAC mainframe are you talking about? It's clearly not the 1108. -- Shmuel (Seymour J.) Metz, SysProg and JOAT Unsolicited bulk E-mail subject to legal action. I reserve the right to publicly post or ridicule any abusive E-mail. Reply to domain Patriot dot net user shmuel+news to contact me. Do not reply to spamtrap@library.lspace.org