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Introduce do_move_bb() to update bitboards after a move
authorMarco Costalba <mcostalba@gmail.com>
Thu, 21 May 2009 08:55:23 +0000 (10:55 +0200)
committerMarco Costalba <mcostalba@gmail.com>
Thu, 21 May 2009 08:55:23 +0000 (10:55 +0200)
Avoid a clear_bit() + set_bit() sequence but update bitboards
with only one xor instructions.

This is faster and simplifies the code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

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