Deja News Toolbar Search over 20,000 high-tech jobs Click here for over 20,000 high-tech jobs message/thread Message 259 of 25 for search * help Re: What's Diabolo? (and who's Po Ching?) Author: Cameron Kaiser Date: 1999/02/23 Forum: comp.sys.cbm sponsored by: eBay more headers author posting history post reply _________________________________________________________________ John/Lori writes: >>Explain "peep hole" optimisation. >You scan the code, looking at it through a small window or >"peep hole", ie you look at a few consecutive instructions at >a time, looking for sustitutions to make that are smaller >and/or faster. Yep, that's what the instruction collapse portion of the code does. :-) Almost exactly, even. >I know I've seen it somewhere in some discussion >of multiplication on the C64, though maybe not by that >name. (there are a number of variations but "Booth's algorithm" >is the one I've seen most often) Interesting. How does that help multiplication? By reducing it to bit shifts, or what, exactly? -- Cameron Kaiser * cdkaiser.cris@com * powered by eight bits * operating on faith -- supporting the Commodore 64/128: http://www.armory.com/~spectre/cwi/ -- head moderator comp.binaries.cbm * cbm special forces unit $ea31 (tincsf) personal page http://calvin.ptloma.edu/~spectre/ * "when in doubt, take a pawn" _________________________________________________________________ view for bookmarking text only mail this message to a friend post reply << prev · next >> subscribe to comp.sys.cbm SPONSORED LINKS Yellow Pages · Bid on Bargains · Shopping · Free Stuff · 5¢ long distance AutoConnect · Trade with Datek · Auctions & Classifieds · GET IT NOW @ NECX Home · Communities · My Deja News · Power Search · Post About Deja News · Ad Info · Our Advertisers ____________________________________________________ Copyright © 1995-99 Deja News, Inc. All rights reserved. Conditions of use · Site privacy statement reviewed by TRUSTe