Introduce do_move_bb() to update bitboards after a move

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index a7b7717e71b4700b5d9d7c4bd3b408698b38c41f..d3a4ae53e5ed93137e44df2d6fc329729a2ff223 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -205,6 +205,17 @@ inline void clear_bit(Bitboard *b, Square s) {
 }
 
 
+/// Functions used to update a bitboard after a move. This is faster
+/// then calling a sequence of clear_bit() + set_bit()
+
+inline Bitboard make_move_bb(Square from, Square to) {
+  return SetMaskBB[from] | SetMaskBB[to];
+}
+
+inline void do_move_bb(Bitboard *b, Bitboard move_bb) {
+  *b ^= move_bb;
+}
+
 /// rank_bb() and file_bb() gives a bitboard containing all squares on a given
 /// file or rank.  It is also possible to pass a square as input to these
 /// functions.