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Use do_move_bb() also for en passant moves

Browse source 
Unfortunatly, due to Chess960 compatibility we cannot
extend also to castling where the destinations squares
are not guaranteed to be empty.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-05-21 11:28:51 +02:00
parent 3e40bd0648
commit 229274546f
1 changed files with 12 additions and 20 deletions
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32
src/position.cpp
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@ -1080,21 +1080,17 @@ void Position::do_ep_move(Move m) {
assert(piece_on(from) == piece_of_color_and_type(us, PAWN));
assert(piece_on(capsq) == piece_of_color_and_type(them, PAWN));
// Remove captured piece
// Remove captured pawn
clear_bit(&(byColorBB[them]), capsq);
clear_bit(&(byTypeBB[PAWN]), capsq);
clear_bit(&(byTypeBB[0]), capsq); // HACK: byTypeBB[0] == occupied squares
board[capsq] = EMPTY;
// Remove moving piece from source square
clear_bit(&(byColorBB[us]), from);
clear_bit(&(byTypeBB[PAWN]), from);
clear_bit(&(byTypeBB[0]), from); // HACK: byTypeBB[0] == occupied squares
// Put moving piece on destination square
set_bit(&(byColorBB[us]), to);
set_bit(&(byTypeBB[PAWN]), to);
set_bit(&(byTypeBB[0]), to); // HACK: byTypeBB[0] == occupied squares
// Move capturing pawn
Bitboard move_bb = make_move_bb(from, to);
do_move_bb(&(byColorBB[us]), move_bb);
do_move_bb(&(byTypeBB[PAWN]), move_bb);
do_move_bb(&(byTypeBB[0]), move_bb); // HACK: byTypeBB[0] == occupied squares
board[to] = board[from];
board[from] = EMPTY;
@ -1371,22 +1367,18 @@ void Position::undo_ep_move(Move m) {
assert(piece_on(from) == EMPTY);
assert(piece_on(capsq) == EMPTY);
// Replace captured piece
// Restore captured pawn
set_bit(&(byColorBB[them]), capsq);
set_bit(&(byTypeBB[PAWN]), capsq);
set_bit(&(byTypeBB[0]), capsq);
board[capsq] = piece_of_color_and_type(them, PAWN);
// Remove moving piece from destination square
clear_bit(&(byColorBB[us]), to);
clear_bit(&(byTypeBB[PAWN]), to);
clear_bit(&(byTypeBB[0]), to);
// Move capturing pawn back to source square
Bitboard move_bb = make_move_bb(to, from);
do_move_bb(&(byColorBB[us]), move_bb);
do_move_bb(&(byTypeBB[PAWN]), move_bb);
do_move_bb(&(byTypeBB[0]), move_bb);
board[to] = EMPTY;
// Replace moving piece at source square
set_bit(&(byColorBB[us]), from);
set_bit(&(byTypeBB[PAWN]), from);
set_bit(&(byTypeBB[0]), from);
board[from] = piece_of_color_and_type(us, PAWN);
// Update piece list