From: Marco Costalba <mcostalba@gmail.com>
Date: Tue, 10 Nov 2009 07:55:52 +0000 (+0100)
Subject: Small update to pop_1st_bit()
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=8a116ce6910529457a2b82dfa8606cce36415852;hp=8a116ce6910529457a2b82dfa8606cce36415852;p=stockfish

Small update to pop_1st_bit()

Avoid a 64 bit load using a pointer. It saves a couple of push/pop
instructions so advantage is only theorical, but anyway we use
pop_1st_bit() as a reference implementation for 32 bit systems so
we keep it more for documentation purposes then for other reasons.

Idea of pointer is of Eric Mullins.

No functional change.

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