-
- // Put the pieces back at the source square
- Bitboard kmove_bb = make_move_bb(kto, kfrom);
- do_move_bb(&(byColorBB[us]), kmove_bb);
- do_move_bb(&(byTypeBB[KING]), kmove_bb);
- do_move_bb(&(byTypeBB[0]), kmove_bb); // HACK: byTypeBB[0] == occupied squares
-
- Bitboard rmove_bb = make_move_bb(rto, rfrom);
- do_move_bb(&(byColorBB[us]), rmove_bb);
- do_move_bb(&(byTypeBB[ROOK]), rmove_bb);
- do_move_bb(&(byTypeBB[0]), rmove_bb); // HACK: byTypeBB[0] == occupied squares
+
+ // Remove pieces from destination squares:
+ clear_bit(&(byColorBB[us]), kto);
+ clear_bit(&(byTypeBB[KING]), kto);
+ clear_bit(&(byTypeBB[0]), kto); // HACK: byTypeBB[0] == occupied squares
+ clear_bit(&(byColorBB[us]), rto);
+ clear_bit(&(byTypeBB[ROOK]), rto);
+ clear_bit(&(byTypeBB[0]), rto); // HACK: byTypeBB[0] == occupied squares
+
+ // Put pieces on source squares:
+ set_bit(&(byColorBB[us]), kfrom);
+ set_bit(&(byTypeBB[KING]), kfrom);
+ set_bit(&(byTypeBB[0]), kfrom); // HACK: byTypeBB[0] == occupied squares
+ set_bit(&(byColorBB[us]), rfrom);
+ set_bit(&(byTypeBB[ROOK]), rfrom);
+ set_bit(&(byTypeBB[0]), rfrom); // HACK: byTypeBB[0] == occupied squares