Article View: comp.lang.misc
Article #6182Re: Clever programming tricks wanted
From: Colin Plumb
Date: Sun, 15 Jan 1989 22:41
Date: Sun, 15 Jan 1989 22:41
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seanf@scolex.UUCP (Sean Fagan) wrote: > Yes, this is the "SuperOptimiser." I believe the author had gotten to work > on 8086's and 6800's (not 68000's, but 00's). No, 68000s. In fact, the timings the thing used were for 68020s. The 8086 version didn't have a hand-tuned intner loop, and was a lot slower, so most of the examples were for 68000s. > BTW, the code it generated assumed you didn't care about which registers you > trashed. True, but just trashing registers arbitrarily takes cycles, and so the optimiser wonn't trash many more than necessary. The rest can easily be diddled by hand or a post-pass to allocate non-conflicting values to the same register. -- -Colin (uunet!microsof!w-colinp)
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!lll-winken!lll-lcc!ames!mailrus!cornell!uw-beaver!microsoft!w-colinp From: w-colinp@microsoft.UUCP (Colin Plumb) Newsgroups: comp.lang.misc Subject: Re: Clever programming tricks wanted Message-ID: <273@microsoft.UUCP> Date: 15 Jan 89 22:41:24 GMT References: <4061@hubcap.UUCP> <47380@yale-celray.yale.UUCP> <2074@scolex> Reply-To: w-colinp@microsoft.uucp (Colin Plumb) Organization: very little Lines: 17