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Subject: Re: questions about using popcount function to count bitboard

Author: Bruce Moreland

Date: 14:35:54 01/10/03

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On January 10, 2003 at 17:17:49, Robert Hyatt wrote:

>On January 10, 2003 at 15:30:20, Bruce Moreland wrote:

>>What percentage of its time does Crafty spend in the popcount() function if the
>>C version is used?
>>
>>bruce
>
>
>I haven't tested in a while.  Last time I did it was something like a couple of
>percent...
>
>Not very significant, overall...
>
>However I did some optimizations that eliminate some of the PopCnt usage by pre-
>computing popcounts for the mobility stuff, for example...

No, it's not, but I suspect that since other bitboard programs use it verbatim,
they are all interested in making it as fast as possible.

bruce




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