Author: Tom Kerrigan
Date: 11:30:31 06/04/98
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On June 03, 1998 at 19:52:54, Robert Hyatt wrote: >>Not true... It's been used successfully in a number of supercomputers. >>The idea has been around and worked for 20+ years now. In fact, back >>when RISC was coming to light, there was a fairly large-scale RISC vs. >>VLIW controversy. >none that I know of. IE not in Cray, CDC, Hitachi, Fujitsu, texas >instruments, etc... ergo I know of *no* successful VLIW computers by >anyone. just prototypes here and there... Well, the success of a supercomputer is hard to measure. With the Intel supercomputer, it only sold one, but it could be said that it was fairly successful. I was working at HP back when these questions were being asked, and because of that, I know that there were two (maybe more) supercomputers based on VLIW made in the 80's alone. You're right, none of the big names built them, but they were built all the same, and from what I gather, they were reasonably successful. >>>magnifying glass, it is simply a restricted form of superscalar, as was >>Yes, it's quite clearly superscalar, and sort of "restricted," but at >>the same time, it simplifies chip design extrordinarily, leaving die >>space for more execution units, more cache, whatever. >no argument there... but it puts the difficult work off onto the >compiler, >since it has to be done somewhere. And doing this affects binary >compatibility in horrible ways... much nicer to have a family of These are simply problems to solve, but not reason to scrap the entire idea... Cheers, Tom
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