Path: utzoo!attcan!uunet!mcvax!enea!tut!pl From: pl@tut.fi (Pertti Lehtinen) Newsgroups: comp.arch Subject: Re: Superoptimiser. Message-ID: <4014@korppi.tut.fi> Date: 4 Jul 88 14:46:06 GMT References: <834@garth.UUCP> Organization: Tampere University of Technology, Finland Lines: 18 From article <834@garth.UUCP>, by smryan@garth.UUCP (Steven Ryan): > > Branches tend to be deadly to fast machines. Delay slots or no, it can still > give the cache/instruction stack indigestion. > > By the way, as we continue forward into the past, the Cyber 170 macros are > filled with handcoded sequences to avoid branches. > When avoiding branches, interesting technique is adopted in ARM-processor (Acorn Risc Machine). All instructions are conditional, which makes it possible to avoid short branches very easily. -- pl@tut.fi ! All opinions expressed above Pertti Lehtinen ! are preliminary and in subject N 61 26' E 23 50' ! to change without any further notice.