Author: Robert Hyatt
Date: 06:02:26 01/28/02
Go up one level in this thread
On January 28, 2002 at 08:36:15, Sune Fischer wrote:
>Hi,
>
>I'm in the process of rewriting my entire movegen, now I'm going to need
>bitboards I've decided, but it seems there are different approaches.
>
>I found this link (it was actually dead, but google had it cached so I put it up
>for a short while)
>http://www.fys.ku.dk/~fischer/Temp/New%20Technology.htm
>
>It is about reversed bitboards, the author claims it is faster than rotated:
>
>"When taking account of memory latencies, calculating the piece attacks using
>the forward and reverse bitboards can be done significantly faster due to total
>independence on lookup tables and complex calculations. There are a few slight
>snags with the diagonal calculations, but they are minor."
>
>
>His description ("significantly faster") entrigues me (hehe) but I can't find
>anything else on reversed bitboards and I've never heard of them before.
>
>What's the catch, is there something he is not telling?
>
>-S.
Find a program that uses them first.
:)
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