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#define MOVES_INTERNAL
#include "engine/moves.h"
void __forloop_bishop_moves_gen(
moves_t* moves,
bitboard_t friendly_type,
bitboard_t friendly_pieces,
bitboard_t enemy_pieces
) {
bitboard_t all_occupied = friendly_pieces | enemy_pieces;
while (friendly_type) {
int from = __builtin_ctzll(friendly_type);
friendly_type &= friendly_type - 1;
bitboard_t attacks = get_bishop_attacks(from, all_occupied) & ~friendly_pieces;
while (attacks) {
int to = __builtin_ctzll(attacks);
attacks &= attacks - 1;
add_move(moves, from, to, .flags = ((enemy_pieces >> to) & 1) ? MOVE_CAPTURE : 0);
}
}
}
void get_bishop_moves(moves_t* moves, position_t position) {
assert_valid_position(position);
bitboard_t friendly_bishops;
bitboard_t friendly_pieces;
bitboard_t enemy_pieces;
if (position.turn == WHITE_TURN) {
friendly_pieces = whites(position);
enemy_pieces = blacks(position);
friendly_bishops = position.bitboards[WHITE_BISHOP];
} else {
friendly_pieces = blacks(position);
enemy_pieces = whites(position);
friendly_bishops = position.bitboards[BLACK_BISHOP];
}
__forloop_bishop_moves_gen(
moves,
friendly_bishops,
friendly_pieces,
enemy_pieces
);
}
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