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Subject: How can you get the number of a bit which is set in a bitboard ?

Author: Johannes Buchner

Date: 15:12:35 08/19/99

Hi there !

I just wanted to know if anybody out there knows a different way how to do this
than using table-lookups like crafty. Is really no other mathematical
possibility ? By the way, do you know any Internet resources that deal with
problems like this (I think there is a method to do popcount without
table-lookups, e.g.) ? In the 'Dark Thought' description they're talking about
'Hacker's memory', a 'well-known collection of programming tricks'. Ever heard
of it ? I haven't !
So if you know anything intersting about that topic, please let me know (and all
the otherz of course !)

         Thanks Johannes

• Re: How can you get the number of a bit which is set in a bitboard ? Andrew Slough 11:03:51 08/20/99
  • Re: How can you get the number of a bit which is set in a bitboard ? Andrew Slough 11:12:46 08/20/99
• Re: How can you get the number of a bit which is set in a bitboard ? Bruce Moreland 02:32:03 08/20/99
• Re: How can you get the number of a bit which is set in a bitboard ? Robert Hyatt 17:59:28 08/19/99
  • Re: How can you get the number of a bit which is set in a bitboard ? David Franklin 14:54:16 08/21/99
    • Re: How can you get the number of a bit which is set in a bitboard ? Bo Persson 14:53:00 08/22/99
    • Re: How can you get the number of a bit which is set in a bitboard ? Eugene Nalimov 15:14:58 08/21/99
• Re: How can you get the number of a bit which is set in a bitboard ? Dan Newman 16:49:48 08/19/99
• Re: How can you get the number of a bit which is set in a bitboard ? Dann Corbit 15:59:16 08/19/99
  • Re: How can you get the number of a bit which is set in a bitboard ? Robert Hyatt 18:02:15 08/19/99
    • Re: How can you get the number of a bit which is set in a bitboard ? Dann Corbit 18:19:51 08/19/99
      • Re: How can you get the number of a bit which is set in a bitboard ? Robert Hyatt 20:37:25 08/19/99

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