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Subject: How about 64-bits?

Author: Russell Reagan

Date: 13:31:38 10/14/02

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This is very interesting Gerd.

Which approach do you think will work the fastest on 64-bit cpus? Rotated, MMX
non-rotated, or plain old non-rotated? A lot of people say rotated are fastest,
now there is this MMX that is at least on par with rotated bitboards, and I
remember reading a while back that some people were using non-rotated bitboards
and doing classic style board scanning to find attacks and such, and that this
old-non-rotated method worked fastest for them (maybe because of better cache
hits?).

So which do you think will be the winner on 64-bit machines? We have all of this
talk about which is the fastest on 32-bit machines, but before too long 64-bit
will be here and all of the conclusions we've drawn might be turned upside down.
What if plain old non-rotated bitboards is the winner on 64-bit hardware?

Any thoughts?

Russell



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