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Subject: Bitfields and Crafty

Author: Artem Pyatakov

Date: 19:56:44 07/11/01

I was checking out the way crafty does hashing today. (yes, I've probably looked
at the way every single open-source engine does hashing today :-) )

I noticed that each of it's HASH_ENTRY structures information is just two 64-bit
numbers.  Then in extracts this info using statements like these:

val=(word1r & 0377777)-65536;

I know C allows for bitfields (fields that just take up a couple of bits), but
does anyone know how fast these are?

In other words, is it better to extract info from bits MYSELF (like Crafty does
it) or let C bitfields handle this for me?

Thanks.

Artem Pyatakov

Re: Bitfields and Crafty Robert Hyatt 20:36:39 07/11/01
- Re: Bitfields and Crafty Tord Romstad 11:58:04 07/16/01
  - Re: Bitfields and Crafty Robert Hyatt 22:09:24 07/20/01
  - Re: Bitfields and Crafty Bruce Moreland 01:25:35 07/17/01
  - Re: Bitfields and Crafty Miguel A. Ballicora 12:49:15 07/16/01
  - Re: Bitfields and Crafty Dann Corbit 12:38:10 07/16/01
    - Re: Bitfields and Crafty Chris Hull 13:38:39 07/17/01
      - Re: Bitfields and Crafty Heiner Marxen 14:43:17 07/17/01
        
        Re: Bitfields and Crafty Dann Corbit 14:52:07 07/17/01
- Re: Bitfields and Crafty Artem Pyatakov 22:04:38 07/11/01

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