Author: Robert Hyatt
Date: 09:00:06 06/06/01
Go up one level in this thread
On June 06, 2001 at 09:38:47, Vincent Diepeveen wrote: >On June 06, 2001 at 09:33:00, martin fierz wrote: > >>On June 06, 2001 at 09:31:32, martin fierz wrote: >> >>>[snip] >>>> >>>>In this piece of crap code i see everywhere: >>>> >>>> if (side == WHITE) >>>> tsq = B->WhiteKnights; >>>> else >>>> tsq = B->BlackKnights; >>>> >>>>Note you can eliminate these branches, which speeds code up bigtime. >>>[snip] >>> >>>so, who can enlighten a dummy like me? how exactly can i eliminate >>>branches like this? i admit that my checkers program has some of these >>>too... although i mostly do it like this >>> >>>if(color==WHITE) >>argh... i hit tab return instead of return, ok, again: > >The logical thing to do which saves a dead slow branch is: > > tsq = globaltable[side]; > :) That replaces a "dead slow branch" with a "dead slower memory reference". some replacement. >Basically you can get rid of any easy branch you want to >even without using Pentiumpro instructions. > >Just create some tables. Tables == bandwidth. The PC has none. > >>if(color==WHITE) >> do lots of stuff >>else >> do lots of other stuff. >> >>is this still so stupid? >> >>cheers >> martin
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