- constexpr std::size_t kMaxSimdWidth = 32;
-
- // unique number for each piece type on each square
- enum {
- PS_NONE = 0,
- PS_W_PAWN = 1,
- PS_B_PAWN = 1 * SQUARE_NB + 1,
- PS_W_KNIGHT = 2 * SQUARE_NB + 1,
- PS_B_KNIGHT = 3 * SQUARE_NB + 1,
- PS_W_BISHOP = 4 * SQUARE_NB + 1,
- PS_B_BISHOP = 5 * SQUARE_NB + 1,
- PS_W_ROOK = 6 * SQUARE_NB + 1,
- PS_B_ROOK = 7 * SQUARE_NB + 1,
- PS_W_QUEEN = 8 * SQUARE_NB + 1,
- PS_B_QUEEN = 9 * SQUARE_NB + 1,
- PS_W_KING = 10 * SQUARE_NB + 1,
- PS_END = PS_W_KING, // pieces without kings (pawns included)
- PS_B_KING = 11 * SQUARE_NB + 1,
- PS_END2 = 12 * SQUARE_NB + 1
- };
-
- constexpr uint32_t kpp_board_index[COLOR_NB][PIECE_NB] = {
- // convention: W - us, B - them
- // viewed from other side, W and B are reversed
- { PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_W_KING, PS_NONE,
- PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_B_KING, PS_NONE },
- { PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_B_KING, PS_NONE,
- PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_W_KING, PS_NONE }
- };