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Prefer 0 to EmptyBoardBB

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Easier and even faster or at least easier to optimize.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-12-03 11:56:11 +01:00
parent 5c5af4fa65
commit a44c5cf4f7
9 changed files with 41 additions and 43 deletions
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2
src/bitbase.cpp
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@@ -151,7 +151,7 @@ namespace {
//
// Case 1: Stalemate
if ( sideToMove == BLACK
&& (bk_attacks() & ~(wk_attacks() | pawn_attacks())) == EmptyBoardBB)
&& !(bk_attacks() & ~(wk_attacks() | pawn_attacks())))
return RESULT_DRAW;
// Case 2: King can capture pawn