Author: Alvaro Jose Povoa Cardoso
Date: 06:46:57 10/13/01
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On October 13, 2001 at 08:45:16, Gian-Carlo Pascutto wrote: >On October 13, 2001 at 08:05:49, Alvaro Jose Povoa Cardoso wrote: > >>What is the fastest way to count the bits in a heavily populated bitboard? >>When I say heavy I mean a 10-24 bit count situation. >>Should I use a lookup table for this particular case? > >If the board is heavily populated and you have a Pentium III or better, take a >look at my MMX bitcount routine. It runs fully paired in the MMX units, without >branches. > >I don't have the code handy but I'm sure Dann has it lying around somewhere. > >-- >GCP Unfortunately my CPU is a Celeron 300A at 450MHz :( Alvaro
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