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Fix pos.count<ALL_PIECES>()

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It was never updated !

Currently it only affects evaluate_passed_pawns()
and in particularly the rule to increase the bonus
if we have more non-pawn pieces. We could simply use
popcount() instead and avoid the little slowdown
in put_piece() and remove_piece(), but this would
leave a very subtle and tricky hole where people
are forced to remember that pos.count<ALL_PIECES>()
does not work. This is not obvious and so dangerous.

Thanks to Ronald de Man for spotting this.

bench: 7931424
This commit is contained in:
Marco Costalba 2013-10-20 23:35:10 +02:00
parent c08e7419a0
commit f22a63ce67
1 changed files with 2 additions and 0 deletions
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2
src/position.h
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@ -405,6 +405,7 @@ inline void Position::put_piece(Square s, Color c, PieceType pt) {
byTypeBB[ALL_PIECES] |= s;
byTypeBB[pt] |= s;
byColorBB[c] |= s;
pieceCount[c][ALL_PIECES]++;
index[s] = pieceCount[c][pt]++;
pieceList[c][pt][index[s]] = s;
}
@ -433,6 +434,7 @@ inline void Position::remove_piece(Square s, Color c, PieceType pt) {
byTypeBB[pt] ^= s;
byColorBB[c] ^= s;
/* board[s] = NO_PIECE; */ // Not needed, will be overwritten by capturing
pieceCount[c][ALL_PIECES]--;
Square lastSquare = pieceList[c][pt][--pieceCount[c][pt]];
index[lastSquare] = index[s];
pieceList[c][pt][index[lastSquare]] = lastSquare;