Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: $Revision: 1.6.2.16 $; site ima.UUCP Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!decvax!cca!ima!johnl From: johnl@ima.UUCP Newsgroups: net.lang.c Subject: Re: Re: This Sentence is False Message-ID: <124000001@ima.UUCP> Date: Mon, 16-Sep-85 21:25:00 EDT Article-I.D.: ima.124000001 Posted: Mon Sep 16 21:25:00 1985 Date-Received: Thu, 19-Sep-85 05:12:33 EDT References: <188@graffiti.UUCP> Lines: 21 Nf-ID: #R:graffiti:-18800:ima:124000001:000:704 Nf-From: ima!johnl Sep 16 21:25:00 1985 /* Written 3:21 pm Sep 13, 1985 by @graffiti@ihdev in ima:net.lang.c */ > On a Dec-20, you have a huge number of strange instructions, including : Actually it's stranger than you said. Instructions include: SKIP Don't skip SKIPA Always skip JUMP Don't jump JUMPA Always jump On the IBM 360/370 series, the branch instrction has a condition mask for the various states of the condition code. If you set all of the mask bits, it branches on any possible set of condition bits, i.e. branch if true. If you set none of the mask bits, it's the no-op instruction, i.e. branch if false. This has nothing to do with net.lang.c, followups to net.arch or perhaps net.games.trivia. John Levine, ima!johnl