Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!wuarchive!cs.utexas.edu!uunet!lll-winken!sun-barr!newstop!exodus!exodus-bb!khb From: khb@chiba.Eng.Sun.COM (Keith Bierman - SPD Advanced Languages) Newsgroups: comp.arch Subject: "Wedging RISC machines" was(Re: I crashed our MIPS machine today) Message-ID: Date: 15 Aug 90 22:28:27 GMT References: <1990Aug10.155458.2237@hod.uit.no> <3899@auspex.auspex.com> Sender: news@exodus.Eng.Sun.COM Organization: Sun MegaSystems Lines: 29 In-reply-to: guy@auspex.auspex.com's message of 15 Aug 90 19:54:04 GMT In article <3899@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes: .. Some background/motivation. My experience with microcode programming taught me that some sequences of MICROINSTRUCTIONS could wedge or jam ... ... The *only* way in which you *might* be able to agree with this as being The misleading title made me miss the potentially useful part of this discussion. If any of you have floating point code which wedges a SPARC please email it to me. I know of no fpcode to accomplish this (sun-spots has had some mention of a clever way to force csh to do commit some sort of evil, but csh is hardly an fp application). SPARCs have interlocks, so there shouldn't be a way to commit some of the nifty vile acts which have helped cause various microcoders to burn machines in the lab. If there are counterexamples, belly up to the bar folks. Thanks In Advance. -- ---------------------------------------------------------------- Keith H. Bierman kbierman@Eng.Sun.COM | khb@chiba.Eng.Sun.COM SMI 2550 Garcia 12-33 | (415 336 2648) Mountain View, CA 94043