Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!gatech!hao!husc6!necntc!ames!hc!hi!cyrus From: cyrus@hi.UUCP (Tait Cyrus) Newsgroups: comp.sys.nsc.32k Subject: cxp/rxp instructions Message-ID: <10742@hi.UUCP> Date: Fri, 10-Jul-87 12:05:39 EDT Article-I.D.: hi.10742 Posted: Fri Jul 10 12:05:39 1987 Date-Received: Sun, 12-Jul-87 11:50:56 EDT Organization: U. of New Mexico, Albuquerque Lines: 28 Keywords: rxp/cxp instructions Here at the University of New Mexico, we will be starting to port GENIX 4.2 to a 32016/32032 board. I have some questions. 1) What good are the cxp/rxp instructions? 2) Why can't the "standard" jsr/ret instructions be used? 3) What advantages are there for going through a jump table instead of jumping directly? The reason I ask is that evern cxp/rxp causes the 32xxx to read from the mod table and I can see this as slowing things down A LOT. I have already had one person say that when they ported GENIX 4.1, they replaced all of the cxp/rxp type instructions with jsr/ret just to speed things up. I would appreciate ANY comments/suggestions/ideas. Thanks in advance -- @__________@ W. Tait Cyrus (505) 277-0806 /| /| University of New Mexico / | / | Dept of EECE - Hypercube Project @__|_______@ | Albuquerque, New Mexico 87131 | | | | | | hc | | e-mail: | @.......|..@ cyrus@hc.dspo.gov or | / | / seismo!unmvax!hi!cyrus @/_________@/