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Subject: Re: Mixing 0x88 and bitboards

Author: Robert Hyatt

Date: 21:03:06 06/26/02

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On June 25, 2002 at 20:00:47, Dieter Buerssner wrote:

>On June 25, 2002 at 19:46:20, Robert Hyatt wrote:
>
>>The issue is this:  how many instructions to do task x?  For bitboards, the
>>instruction count on a 32 bit machine jumps by a factor of two unless shifts
>>are being done where it goes up even further.
>
>Why should it go up further for shifts?
>
>Dieter


You can't just do two 32 bit operations.  You shift one end.  You have to
save the part you shift out.  You shift the other end.  Then fold in the
part you saved from the first shift...




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