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move_gen_x.c
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#include "move_gen_x.h"
#include <stdlib.h>
#define bsf_x(bb) __builtin_ctzll((bb))
#define bsr_x(bb) __builtin_clzll((bb))
#define pop_count_x(bb) __builtin_popcountll((bb))
#define RANK_4_X 0X00000000FF000000ULL
#define RANK_5_X 0X000000FF00000000ULL
#define RANK_8_X 0XFF00000000000000ULL
#define RANK_1_X 0X00000000000000FFULL
#define NOT_RANK_8_X 0X00FFFFFFFFFFFFFFULL
#define NOT_RANK_1_X 0XFFFFFFFFFFFFFF00ULL
#define NOT_FILE_H_X 0X7F7F7F7F7F7F7F7FULL
#define NOT_FILE_A_X 0XFEFEFEFEFEFEFEFEULL
#define HIGH_BB_X 0X8000000000000000ULL
#define add_move_x(p, c_p, f, t, e_p, n_p) moves->p_piece = moves->piece = p;\
moves->c_piece = c_p;\
moves->from = f;\
moves->to = t;\
moves->enp_pos = e_p;\
moves->new_enp = n_p;\
moves->castle = 0;\
++moves;\
++index;
#define add_pro_move_x(p, p_p, c_p, f, t, e_p, n_p) moves->piece = p;\
moves->p_piece = p_p;\
moves->c_piece = c_p;\
moves->from = f;\
moves->to = t;\
moves->enp_pos = e_p;\
moves->new_enp = n_p;\
moves->castle = 0;\
++moves;\
++index;
bb_t_x knight_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x king_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x file_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x rank_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x diagonal_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x anti_diagonal_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x upper_bb_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x lower_bb_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
int castle_pos_x[PLAYER_N_X][2] = { {7, 0}, {63, 56} };
bb_t_x castle_king_bb_x[PLAYER_N_X][3];
bb_t_x castle_rook_bb_x[PLAYER_N_X][4];
int castle_king_pos_x[PLAYER_N_X][3];
int castle_rook_pos_x[PLAYER_N_X][4];
bb_t_x can_castle_bb_x[PLAYER_N_X][2];
bb_t_x can_castle_attack_bb_x[PLAYER_N_X][2];
int r_shift_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
int b_shift_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x r_mask_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x b_mask_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x r_magic_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x b_magic_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x *r_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
bb_t_x *b_attack_x[BOARD_WIDTH_X * BOARD_HEIGHT_X];
static bb_t_x random_bb() {
bb_t_x u1, u2, u3, u4;
u1 = (bb_t_x)(random()) & 0xFFFF; u2 = (bb_t_x)(random()) & 0xFFFF;
u3 = (bb_t_x)(random()) & 0xFFFF; u4 = (bb_t_x)(random()) & 0xFFFF;
return u1 | (u2 << 16) | (u3 << 32) | (u4 << 48);
}
static bb_t_x random_bb_fewbits() {
return random_bb() & random_bb() & random_bb();
}
static bb_t_x index_to_bb(int index, int bits, bb_t_x m) {
int i, j;
bb_t_x result = 0ULL;
for (i = 0; i < bits; ++i) {
j = bsf_x(m);
m &= m - 1;
if (index & (1 << i)) result |= (1ULL << j);
}
return result;
}
void move_gen_init_x(void) {
int i, j, k, i2, j2;
for (i = 0; i < BOARD_WIDTH_X * BOARD_HEIGHT_X; ++i) {
bb_t_x knights = ((bb_t_x)1) << i;
bb_t_x l1 = (knights >> 1) & 0x7f7f7f7f7f7f7f7full;
bb_t_x l2 = (knights >> 2) & 0x3f3f3f3f3f3f3f3full;
bb_t_x r1 = (knights << 1) & 0xfefefefefefefefeull;
bb_t_x r2 = (knights << 2) & 0xfcfcfcfcfcfcfcfcull;
bb_t_x h1 = l1 | r1;
bb_t_x h2 = l2 | r2;
knight_attack_x[i] = (h1 << 16) | (h1 >> 16) | (h2 << 8) | (h2 >> 8);
}
for (i = 0; i < BOARD_WIDTH_X * BOARD_HEIGHT_X; ++i) {
bb_t_x kings = ((bb_t_x)1) << i;
bb_t_x attacks = ((kings & NOT_FILE_H_X) << 1) | ((kings & NOT_FILE_A_X) >> 1);
kings |= attacks;
attacks |= (kings << BOARD_WIDTH_X) | (kings >> BOARD_WIDTH_X);
king_attack_x[i] = attacks;
}
for (i = 0; i < BOARD_HEIGHT_X; ++i)
for (j = 0; j < BOARD_WIDTH_X; ++j) {
for (k = i + 1; k < BOARD_HEIGHT_X; ++k)
file_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (k * BOARD_WIDTH_X + j);
for (k = i - 1; k >= 0; --k)
file_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (k * BOARD_WIDTH_X + j);
}
for (i = 0; i < BOARD_HEIGHT_X; ++i)
for (j = 0; j < BOARD_WIDTH_X; ++j) {
for (k = j + 1; k < BOARD_WIDTH_X; ++k)
rank_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (i * BOARD_WIDTH_X + k);
for (k = j - 1; k >= 0; --k)
rank_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (i * BOARD_WIDTH_X + k);
}
for (i = 0; i < BOARD_HEIGHT_X; ++i)
for (j = 0; j < BOARD_WIDTH_X; ++j) {
i2 = i + 1; j2 = j + 1;
while (i2 < BOARD_HEIGHT_X && j2 < BOARD_WIDTH_X) {
diagonal_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (i2 * BOARD_WIDTH_X + j2);
++i2; ++j2;
}
i2 = i - 1; j2 = j - 1;
while (i2 >= 0 && j2 >= 0) {
diagonal_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (i2 * BOARD_WIDTH_X + j2);
--i2; --j2;
}
i2 = i + 1; j2 = j - 1;
while (i2 < BOARD_HEIGHT_X && j2 >= 0) {
anti_diagonal_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (i2 * BOARD_WIDTH_X + j2);
++i2; --j2;
}
i2 = i - 1; j2 = j + 1;
while (i2 >= 0 && j2 < BOARD_WIDTH_X) {
anti_diagonal_attack_x[i * BOARD_WIDTH_X + j] |= ((bb_t_x)1) << (i2 * BOARD_WIDTH_X + j2);
--i2; ++j2;
}
}
for (i = 0; i < BOARD_WIDTH_X * BOARD_HEIGHT_X; ++i) {
for (j = 0; j < i; ++j)
lower_bb_x[i] |= ((bb_t_x)1) << j;
for (j = i + 1; j < BOARD_WIDTH_X * BOARD_HEIGHT_X; ++j)
upper_bb_x[i] |= ((bb_t_x)1) << j;
}
castle_king_bb_x[WHITE_X][0] = ((bb_t_x)1) << 4;
castle_king_bb_x[WHITE_X][1] = ((bb_t_x)1) << 6;
castle_king_bb_x[WHITE_X][2] = ((bb_t_x)1) << 2;
castle_king_bb_x[BLACK_X][0] = ((bb_t_x)1) << 60;
castle_king_bb_x[BLACK_X][1] = ((bb_t_x)1) << 62;
castle_king_bb_x[BLACK_X][2] = ((bb_t_x)1) << 58;
castle_rook_bb_x[WHITE_X][0] = ((bb_t_x)1) << 7;
castle_rook_bb_x[WHITE_X][1] = ((bb_t_x)1) << 5;
castle_rook_bb_x[WHITE_X][2] = ((bb_t_x)1) << 0;
castle_rook_bb_x[WHITE_X][3] = ((bb_t_x)1) << 3;
castle_rook_bb_x[BLACK_X][0] = ((bb_t_x)1) << 63;
castle_rook_bb_x[BLACK_X][1] = ((bb_t_x)1) << 61;
castle_rook_bb_x[BLACK_X][2] = ((bb_t_x)1) << 56;
castle_rook_bb_x[BLACK_X][3] = ((bb_t_x)1) << 59;
castle_king_pos_x[WHITE_X][0] = 4;
castle_king_pos_x[WHITE_X][1] = 6;
castle_king_pos_x[WHITE_X][2] = 2;
castle_king_pos_x[BLACK_X][0] = 60;
castle_king_pos_x[BLACK_X][1] = 62;
castle_king_pos_x[BLACK_X][2] = 58;
castle_rook_pos_x[WHITE_X][0] = 7;
castle_rook_pos_x[WHITE_X][1] = 5;
castle_rook_pos_x[WHITE_X][2] = 0;
castle_rook_pos_x[WHITE_X][3] = 3;
castle_rook_pos_x[BLACK_X][0] = 63;
castle_rook_pos_x[BLACK_X][1] = 61;
castle_rook_pos_x[BLACK_X][2] = 56;
castle_rook_pos_x[BLACK_X][3] = 59;
can_castle_bb_x[WHITE_X][0] = castle_rook_bb_x[WHITE_X][0] - 2 * castle_king_bb_x[WHITE_X][0];
can_castle_bb_x[WHITE_X][1] = castle_king_bb_x[WHITE_X][0] - 2 * castle_rook_bb_x[WHITE_X][2];
can_castle_bb_x[BLACK_X][0] = castle_rook_bb_x[BLACK_X][0] - 2 * castle_king_bb_x[BLACK_X][0];
can_castle_bb_x[BLACK_X][1] = castle_king_bb_x[BLACK_X][0] - 2 * castle_rook_bb_x[BLACK_X][2];
can_castle_attack_bb_x[WHITE_X][0] = 2 * castle_king_bb_x[WHITE_X][1] - castle_king_bb_x[WHITE_X][0];
can_castle_attack_bb_x[WHITE_X][1] = 2 * castle_king_bb_x[WHITE_X][0] - castle_king_bb_x[WHITE_X][2];
can_castle_attack_bb_x[BLACK_X][0] = 2 * castle_king_bb_x[BLACK_X][1] - castle_king_bb_x[BLACK_X][0];
can_castle_attack_bb_x[BLACK_X][1] = 2 * castle_king_bb_x[BLACK_X][0] - castle_king_bb_x[BLACK_X][2];
int file, rank;
for (i = 0; i < BOARD_WIDTH_X * BOARD_HEIGHT_X; ++i) {
file = i % BOARD_WIDTH_X;
rank = i / BOARD_WIDTH_X;
r_mask_x[i] = file_attack_x[i] | rank_attack_x[i];
b_mask_x[i] = diagonal_attack_x[i] | anti_diagonal_attack_x[i];
if (file != 0) {
r_mask_x[i] &= NOT_FILE_A_X;
b_mask_x[i] &= NOT_FILE_A_X;
}
if (file != BOARD_WIDTH_X - 1) {
r_mask_x[i] &= NOT_FILE_H_X;
b_mask_x[i] &= NOT_FILE_H_X;
}
if (rank != 0) {
r_mask_x[i] &= NOT_RANK_1_X;
b_mask_x[i] &= NOT_RANK_1_X;
}
if (rank != BOARD_HEIGHT_X - 1) {
r_mask_x[i] &= NOT_RANK_8_X;
b_mask_x[i] &= NOT_RANK_8_X;
}
r_shift_x[i] = pop_count_x(r_mask_x[i]);
b_shift_x[i] = pop_count_x(b_mask_x[i]);
}
bb_t_x used[4096], block[4096], att[4096];
bb_t_x occu, up, low, magic;
int fail, fail2, index;
for (i = 0; i < BOARD_WIDTH_X * BOARD_HEIGHT_X; ++i) {
for (j = 0; j < (1 << r_shift_x[i]); ++j) {
block[j] = index_to_bb(j, r_shift_x[i], r_mask_x[i]);
occu = block[j] & file_attack_x[i];
up = occu & upper_bb_x[i];
up = up & -up;
low = HIGH_BB_X >> bsr_x((occu & lower_bb_x[i]) | 1ULL);
att[j] = ((up * 2) - low) & file_attack_x[i];
occu = block[j] & rank_attack_x[i];
up = occu & upper_bb_x[i];
up = up & -up;
low = HIGH_BB_X >> bsr_x((occu & lower_bb_x[i]) | 1ULL);
att[j] |= ((up * 2) - low) & rank_attack_x[i];
}
r_attack_x[i] = (bb_t_x *)calloc(1 << r_shift_x[i], sizeof(bb_t_x));
fail = 1;
while (fail) {
magic = random_bb_fewbits();
for (k = 0; k < 4096; ++k) used[k] = 0;
fail2 = 0;
for (j = 0; j < (1 << r_shift_x[i]); ++j) {
index = (block[j] * magic) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[i]);
r_attack_x[i][index] = att[j];
if (used[index] == 0) used[index] = att[j];
else if (used[index] != att[j]) {
fail2 = 1;
break;
}
}
if (!fail2) {
r_magic_x[i] = magic;
fail = 0;
}
}
for (j = 0; j < (1 << b_shift_x[i]); ++j) {
block[j] = index_to_bb(j, b_shift_x[i], b_mask_x[i]);
occu = block[j] & diagonal_attack_x[i];
up = occu & upper_bb_x[i];
up = up & -up;
low = HIGH_BB_X >> bsr_x((occu & lower_bb_x[i]) | 1ULL);
att[j] = ((up * 2) - low) & diagonal_attack_x[i];
occu = block[j] & anti_diagonal_attack_x[i];
up = occu & upper_bb_x[i];
up = up & -up;
low = HIGH_BB_X >> bsr_x((occu & lower_bb_x[i]) | 1ULL);
att[j] |= ((up * 2) - low) & anti_diagonal_attack_x[i];
}
b_attack_x[i] = (bb_t_x *)calloc(1 << b_shift_x[i], sizeof(bb_t_x));
fail = 1;
while (fail) {
magic = random_bb_fewbits();
for (k = 0; k < 4096; ++k) used[k] = 0;
fail2 = 0;
for (j = 0; j < (1 << b_shift_x[i]); ++j) {
index = (block[j] * magic) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[i]);
b_attack_x[i][index] = att[j];
if (used[index] == 0) used[index] = att[j];
else if (used[index] != att[j]) {
fail2 = 1;
break;
}
}
if (!fail2) {
b_magic_x[i] = magic;
fail = 0;
}
}
}
}
int move_gen_x(register move_x *moves, register board_x *bd) {
register int pos, pos2, index = 0;
register int check = 0, s = 1 - bd->side;
register bb_t_x attack_bb = 0, att, check_bb, temp, temp2;
bb_t_x pinned_bb[PIECE_N_X - 1][4] = {0};
if (s == WHITE_X) {
att = (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X + 1)) & NOT_FILE_A_X;
if ((temp = (att & bd->bb_arr[bd->side][K_X]) >> (BOARD_WIDTH_X + 1))) {
check_bb = temp;
++check;
}
attack_bb |= att;
att = (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X - 1)) & NOT_FILE_H_X;
if ((temp = (att & bd->bb_arr[bd->side][K_X]) >> (BOARD_WIDTH_X - 1))) {
check_bb = temp;
++check;
}
attack_bb |= att;
}
else {
att = (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X - 1)) & NOT_FILE_A_X;
if ((temp = (att & bd->bb_arr[bd->side][K_X]) << (BOARD_WIDTH_X - 1))) {
check_bb = temp;
++check;
}
attack_bb |= att;
att = (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X + 1)) & NOT_FILE_H_X;
if ((temp = (att & bd->bb_arr[bd->side][K_X]) << (BOARD_WIDTH_X + 1))) {
check_bb = temp;
++check;
}
attack_bb |= att;
}
temp = bd->bb_arr[s][N_X];
while (temp) {
pos = bsf_x(temp);
if (bd->bb_arr[bd->side][K_X] & knight_attack_x[pos]) {
check_bb = ((bb_t_x)1) << pos;
++check;
}
attack_bb |= knight_attack_x[pos];
temp &= temp - 1;
}
register bb_t_x kings = bd->bb_arr[s][K_X];
register bb_t_x attacks = ((kings & NOT_FILE_H_X) << 1) | ((kings & NOT_FILE_A_X) >> 1);
kings |= attacks;
attacks |= (kings << BOARD_WIDTH_X) | (kings >> BOARD_WIDTH_X);
attack_bb |= attacks;
temp = bd->bb_arr[s][R_X] | bd->bb_arr[s][Q_X];
register bb_t_x occu, up;
while (temp) {
pos = bsf_x(temp);
attack_bb |= r_attack_x[pos][(((bd->all_pieces ^ bd->bb_arr[bd->side][K_X]) & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
att = r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
if (file_attack_x[pos] & att & upper_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (file_attack_x[pos] & att & upper_bb_x[pos]) | (((bb_t_x)1) << pos);
}
else if (file_attack_x[pos] & att & lower_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (file_attack_x[pos] & att & lower_bb_x[pos]) | (((bb_t_x)1) << pos);
}
if (rank_attack_x[pos] & att & upper_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (rank_attack_x[pos] & att & upper_bb_x[pos]) | (((bb_t_x)1) << pos);
}
else if (rank_attack_x[pos] & att & lower_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (rank_attack_x[pos] & att & lower_bb_x[pos]) | (((bb_t_x)1) << pos);
}
occu = bd->all_pieces & file_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & bd->bb_arr[bd->side][K_X]) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & bd->bb_arr[bd->side][K_X]))
pinned_bb[bd->piece_set[pos2]][0] |= ((bb_t_x)1) << pos2;
}
occu = bd->all_pieces & rank_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & bd->bb_arr[bd->side][K_X]) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & bd->bb_arr[bd->side][K_X]))
pinned_bb[bd->piece_set[pos2]][1] |= ((bb_t_x)1) << pos2;
}
temp &= temp - 1;
}
temp = bd->bb_arr[s][B_X] | bd->bb_arr[s][Q_X];
while (temp) {
pos = bsf_x(temp);
attack_bb |= b_attack_x[pos][(((bd->all_pieces ^ bd->bb_arr[bd->side][K_X]) & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
att = b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
if (diagonal_attack_x[pos] & att & upper_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (diagonal_attack_x[pos] & att & upper_bb_x[pos]) | (((bb_t_x)1) << pos);
}
else if (diagonal_attack_x[pos] & att & lower_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (diagonal_attack_x[pos] & att & lower_bb_x[pos]) | (((bb_t_x)1) << pos);
}
if (anti_diagonal_attack_x[pos] & att & upper_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (anti_diagonal_attack_x[pos] & att & upper_bb_x[pos]) | (((bb_t_x)1) << pos);
}
else if (anti_diagonal_attack_x[pos] & att & lower_bb_x[pos] & bd->bb_arr[bd->side][K_X]) {
++check;
check_bb = (anti_diagonal_attack_x[pos] & att & lower_bb_x[pos]) | (((bb_t_x)1) << pos);
}
occu = bd->all_pieces & diagonal_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & bd->bb_arr[bd->side][K_X]) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & bd->bb_arr[bd->side][K_X]))
pinned_bb[bd->piece_set[pos2]][2] |= ((bb_t_x)1) << pos2;
}
occu = bd->all_pieces & anti_diagonal_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & bd->bb_arr[bd->side][K_X]) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & bd->bb_arr[bd->side][K_X]))
pinned_bb[bd->piece_set[pos2]][3] |= ((bb_t_x)1) << pos2;
}
temp &= temp - 1;
}
temp = bd->bb_arr[bd->side][K_X];
while (temp) {
pos = bsf_x(temp);
occu = bd->all_pieces & file_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & (bd->bb_arr[s][R_X] | bd->bb_arr[s][Q_X])) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & (bd->bb_arr[s][R_X] | bd->bb_arr[s][Q_X])))
pinned_bb[bd->piece_set[pos2]][0] |= ((bb_t_x)1) << pos2;
}
occu = bd->all_pieces & rank_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & (bd->bb_arr[s][R_X] | bd->bb_arr[s][Q_X])) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & (bd->bb_arr[s][R_X] | bd->bb_arr[s][Q_X])))
pinned_bb[bd->piece_set[pos2]][1] |= ((bb_t_x)1) << pos2;
}
occu = bd->all_pieces & diagonal_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & (bd->bb_arr[s][B_X] | bd->bb_arr[s][Q_X])) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & (bd->bb_arr[s][B_X] | bd->bb_arr[s][Q_X])))
pinned_bb[bd->piece_set[pos2]][2] |= ((bb_t_x)1) << pos2;
}
occu = bd->all_pieces & anti_diagonal_attack_x[pos];
up = occu & upper_bb_x[pos];
if (up && (up & (bd->bb_arr[s][B_X] | bd->bb_arr[s][Q_X])) && (up & -up & bd->pieces_bb[bd->side])) {
pos2 = bsf_x(up);
up &= up - 1;
if (up && (up & -up & (bd->bb_arr[s][B_X] | bd->bb_arr[s][Q_X])))
pinned_bb[bd->piece_set[pos2]][3] |= ((bb_t_x)1) << pos2;
}
temp &= temp - 1;
}
if (check >= 2) {
temp = bd->bb_arr[bd->side][K_X];
while (temp) {
pos = bsf_x(temp);
temp2 = king_attack_x[pos] & bd->capture_emp & ~attack_bb;
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(K_X, bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
}
else if (check == 1) {
if (bd->side == WHITE_X) {
temp2 = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) << BOARD_WIDTH_X) & bd->empty_sqrs & NOT_RANK_8_X;
temp = temp2 & check_bb;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = check_bb & (temp2 << BOARD_WIDTH_X) & bd->empty_sqrs & RANK_4_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos - 2 * BOARD_WIDTH_X, pos, 0, ((bb_t_x)1) << (pos - BOARD_WIDTH_X));
temp &= temp - 1;
}
temp = check_bb & ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) << BOARD_WIDTH_X) & bd->empty_sqrs & RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, Q_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, R_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, B_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = check_bb & ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) << (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_A_X & NOT_RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X + 1)) & bd->enp_pos & NOT_FILE_A_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = check_bb & ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) << (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_H_X & NOT_RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X - 1)) & bd->enp_pos & NOT_FILE_H_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = check_bb & ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) << (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_A_X & RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
temp = check_bb & ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) << (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_H_X & RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
}
else {
temp2 = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) >> BOARD_WIDTH_X) & bd->empty_sqrs & NOT_RANK_1_X;
temp = temp2 & check_bb;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = check_bb & (temp2 >> BOARD_WIDTH_X) & bd->empty_sqrs & RANK_5_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos + 2 * BOARD_WIDTH_X, pos, 0, ((bb_t_x)1) << (pos + BOARD_WIDTH_X));
temp &= temp - 1;
}
temp = check_bb & ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) >> BOARD_WIDTH_X) & bd->empty_sqrs & RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, Q_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, R_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, B_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = check_bb & ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) >> (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_H_X & NOT_RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X + 1)) & bd->enp_pos & NOT_FILE_H_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = check_bb & ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) >> (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_A_X & NOT_RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X - 1)) & bd->enp_pos & NOT_FILE_A_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = check_bb & ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) >> (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_H_X & RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
temp = check_bb & ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) >> (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_A_X & RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
}
temp = bd->bb_arr[bd->side][N_X] & ~(pinned_bb[N_X][0] | pinned_bb[N_X][1] | pinned_bb[N_X][2] | pinned_bb[N_X][3]);
while (temp) {
pos = bsf_x(temp);
temp2 = check_bb & knight_attack_x[pos] & bd->capture_emp;
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(N_X, bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = bd->bb_arr[bd->side][K_X];
while (temp) {
pos = bsf_x(temp);
temp2 = king_attack_x[pos] & bd->capture_emp & ~attack_bb;
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(K_X, bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][R_X] & ~(pinned_bb[R_X][1] | pinned_bb[R_X][2] | pinned_bb[R_X][3])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][1] | pinned_bb[Q_X][2] | pinned_bb[Q_X][3]));
while (temp) {
pos = bsf_x(temp);
temp2 = check_bb & file_attack_x[pos] & bd->capture_emp & r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][R_X] & ~(pinned_bb[R_X][0] | pinned_bb[R_X][2] | pinned_bb[R_X][3])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][0] | pinned_bb[Q_X][2] | pinned_bb[Q_X][3]));
while (temp) {
pos = bsf_x(temp);
temp2 = check_bb & rank_attack_x[pos] & bd->capture_emp & r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][B_X] & ~(pinned_bb[B_X][0] | pinned_bb[B_X][1] | pinned_bb[B_X][3])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][0] | pinned_bb[Q_X][1] | pinned_bb[Q_X][3]));
while (temp) {
pos = bsf_x(temp);
temp2 = check_bb & diagonal_attack_x[pos] & bd->capture_emp & b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][B_X] & ~(pinned_bb[B_X][0] | pinned_bb[B_X][1] | pinned_bb[B_X][2])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][0] | pinned_bb[Q_X][1] | pinned_bb[Q_X][2]));
while (temp) {
pos = bsf_x(temp);
temp2 = check_bb & anti_diagonal_attack_x[pos] & bd->capture_emp & b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
}
else {
if (bd->side == WHITE_X) {
temp2 = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) << BOARD_WIDTH_X) & bd->empty_sqrs & NOT_RANK_8_X;
temp = temp2;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = (temp2 << BOARD_WIDTH_X) & bd->empty_sqrs & RANK_4_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos - 2 * BOARD_WIDTH_X, pos, 0, ((bb_t_x)1) << (pos - BOARD_WIDTH_X));
temp &= temp - 1;
}
temp = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) << BOARD_WIDTH_X) & bd->empty_sqrs & RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, Q_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, R_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, B_X, EMPTY_X, pos - BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) << (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_A_X & NOT_RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X + 1)) & bd->enp_pos & NOT_FILE_A_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_2_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) << (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_H_X & NOT_RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X - 1)) & bd->enp_pos & NOT_FILE_H_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_2_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) << (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_A_X & RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos - BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
temp = ((bd->bb_arr[WHITE_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) << (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_H_X & RANK_8_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos - BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
}
else {
temp2 = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) >> BOARD_WIDTH_X) & bd->empty_sqrs & NOT_RANK_1_X;
temp = temp2;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = (temp2 >> BOARD_WIDTH_X) & bd->empty_sqrs & RANK_5_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, EMPTY_X, pos + 2 * BOARD_WIDTH_X, pos, 0, ((bb_t_x)1) << (pos + BOARD_WIDTH_X));
temp &= temp - 1;
}
temp = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][1] | pinned_bb[P_X][2] | pinned_bb[P_X][3])) >> BOARD_WIDTH_X) & bd->empty_sqrs & RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, Q_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, R_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
add_pro_move_x(P_X, B_X, EMPTY_X, pos + BOARD_WIDTH_X, pos, 0, 0);
temp &= temp - 1;
}
temp = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) >> (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_H_X & NOT_RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X + 1)) & bd->enp_pos & NOT_FILE_H_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_2_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) >> (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_A_X & NOT_RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
temp = (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X - 1)) & bd->enp_pos & NOT_FILE_A_X;
if (temp) {
pos = bsf_x(temp);
add_move_x(P_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, bd->enp_pos, 0);
make_move_x(bd, --moves);
if (post_check_2_x(bd)) {
unmake_move_x(bd, moves);
++moves;
}
else {
unmake_move_x(bd, moves);
--index;
}
}
temp = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][3])) >> (BOARD_WIDTH_X + 1)) & bd->capture & NOT_FILE_H_X & RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos + BOARD_WIDTH_X + 1, pos, 0, 0);
temp &= temp - 1;
}
temp = ((bd->bb_arr[BLACK_X][P_X] & ~(pinned_bb[P_X][0] | pinned_bb[P_X][1] | pinned_bb[P_X][2])) >> (BOARD_WIDTH_X - 1)) & bd->capture & NOT_FILE_A_X & RANK_1_X;
while (temp) {
pos = bsf_x(temp);
add_pro_move_x(P_X, N_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, Q_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, R_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
add_pro_move_x(P_X, B_X, bd->piece_set[pos], pos + BOARD_WIDTH_X - 1, pos, 0, 0);
temp &= temp - 1;
}
}
temp = bd->bb_arr[bd->side][N_X] & ~(pinned_bb[N_X][0] | pinned_bb[N_X][1] | pinned_bb[N_X][2] | pinned_bb[N_X][3]);
while (temp) {
pos = bsf_x(temp);
temp2 = knight_attack_x[pos] & bd->capture_emp;
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(N_X, bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = bd->bb_arr[bd->side][K_X];
while (temp) {
pos = bsf_x(temp);
temp2 = king_attack_x[pos] & bd->capture_emp & ~attack_bb;
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(K_X, bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][R_X] & ~(pinned_bb[R_X][1] | pinned_bb[R_X][2] | pinned_bb[R_X][3])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][1] | pinned_bb[Q_X][2] | pinned_bb[Q_X][3]));
while (temp) {
pos = bsf_x(temp);
temp2 = file_attack_x[pos] & bd->capture_emp & r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][R_X] & ~(pinned_bb[R_X][0] | pinned_bb[R_X][2] | pinned_bb[R_X][3])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][0] | pinned_bb[Q_X][2] | pinned_bb[Q_X][3]));
while (temp) {
pos = bsf_x(temp);
temp2 = rank_attack_x[pos] & bd->capture_emp & r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][B_X] & ~(pinned_bb[B_X][0] | pinned_bb[B_X][1] | pinned_bb[B_X][3])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][0] | pinned_bb[Q_X][1] | pinned_bb[Q_X][3]));
while (temp) {
pos = bsf_x(temp);
temp2 = diagonal_attack_x[pos] & bd->capture_emp & b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
temp = (bd->bb_arr[bd->side][B_X] & ~(pinned_bb[B_X][0] | pinned_bb[B_X][1] | pinned_bb[B_X][2])) | (bd->bb_arr[bd->side][Q_X] & ~(pinned_bb[Q_X][0] | pinned_bb[Q_X][1] | pinned_bb[Q_X][2]));
while (temp) {
pos = bsf_x(temp);
temp2 = anti_diagonal_attack_x[pos] & bd->capture_emp & b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
while (temp2) {
pos2 = bsf_x(temp2);
add_move_x(bd->piece_set[pos], bd->piece_set[pos2], pos, pos2, 0, 0);
temp2 &= temp2 - 1;
}
temp &= temp - 1;
}
if (bd->castle[bd->side][0] && !(bd->all_pieces & can_castle_bb_x[bd->side][0]) && !(attack_bb & can_castle_attack_bb_x[bd->side][0])) {
moves->castle = 1;
moves->enp_pos = 0;
moves->new_enp = 0;
++moves;
++index;
}
if (bd->castle[bd->side][1] && !(bd->all_pieces & can_castle_bb_x[bd->side][1]) && !(attack_bb & can_castle_attack_bb_x[bd->side][1])) {
moves->castle = 2;
moves->enp_pos = 0;
moves->new_enp = 0;
++moves;
++index;
}
}
return index;
}
int post_check_x(register board_x *bd) {
register bb_t_x attack_bb = 0;
if (bd->side == WHITE_X) {
attack_bb |= (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X + 1)) & NOT_FILE_A_X;
attack_bb |= (bd->bb_arr[WHITE_X][P_X] << (BOARD_WIDTH_X - 1)) & NOT_FILE_H_X;
}
else {
attack_bb |= (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X - 1)) & NOT_FILE_A_X;
attack_bb |= (bd->bb_arr[BLACK_X][P_X] >> (BOARD_WIDTH_X + 1)) & NOT_FILE_H_X;
}
register bb_t_x knights = bd->bb_arr[bd->side][N_X];
register bb_t_x l1 = (knights >> 1) & 0x7f7f7f7f7f7f7f7full;
register bb_t_x l2 = (knights >> 2) & 0x3f3f3f3f3f3f3f3full;
register bb_t_x r1 = (knights << 1) & 0xfefefefefefefefeull;
register bb_t_x r2 = (knights << 2) & 0xfcfcfcfcfcfcfcfcull;
register bb_t_x h1 = l1 | r1;
register bb_t_x h2 = l2 | r2;
attack_bb |= (h1 << 16) | (h1 >> 16) | (h2 << 8) | (h2 >> 8);
register bb_t_x temp = bd->bb_arr[bd->side][R_X] | bd->bb_arr[bd->side][Q_X];
register int pos;
while (temp) {
pos = bsf_x(temp);
attack_bb |= r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
temp &= temp - 1;
}
temp = bd->bb_arr[bd->side][B_X] | bd->bb_arr[bd->side][Q_X];
while (temp) {
pos = bsf_x(temp);
attack_bb |= b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
temp &= temp - 1;
}
return !(attack_bb & bd->bb_arr[1 - bd->side][K_X]);
}
int post_check_2_x(register board_x *bd) {
register bb_t_x attack_bb = 0;
register bb_t_x temp = bd->bb_arr[bd->side][R_X] | bd->bb_arr[bd->side][Q_X];
register int pos;
while (temp) {
pos = bsf_x(temp);
attack_bb |= r_attack_x[pos][((bd->all_pieces & r_mask_x[pos]) * r_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - r_shift_x[pos])];
temp &= temp - 1;
}
temp = bd->bb_arr[bd->side][B_X] | bd->bb_arr[bd->side][Q_X];
while (temp) {
pos = bsf_x(temp);
attack_bb |= b_attack_x[pos][((bd->all_pieces & b_mask_x[pos]) * b_magic_x[pos]) >> (BOARD_WIDTH_X * BOARD_HEIGHT_X - b_shift_x[pos])];
temp &= temp - 1;
}
return !(attack_bb & bd->bb_arr[1 - bd->side][K_X]);
}
void make_move_x(register board_x *bd, register move_x *mv) {
mv->pre_castle[WHITE_X][0] = bd->castle[WHITE_X][0];
mv->pre_castle[WHITE_X][1] = bd->castle[WHITE_X][1];
mv->pre_castle[BLACK_X][0] = bd->castle[BLACK_X][0];
mv->pre_castle[BLACK_X][1] = bd->castle[BLACK_X][1];
mv->pre_enp = bd->enp_pos;
bd->enp_pos = mv->new_enp;
if (mv->castle) {
bd->bb_arr[bd->side][K_X] ^= castle_king_bb_x[bd->side][0];
bd->bb_arr[bd->side][K_X] ^= castle_king_bb_x[bd->side][mv->castle];