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movegen: separate all captures (easier later handling)

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Bruno Raoult
2024-03-18 10:12:35 +01:00
parent dc916f5c56
commit 8527c3dee1
1 changed files with 21 additions and 23 deletions
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44
src/move-gen.c
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@@ -174,7 +174,6 @@ int pos_gen_pseudomoves(pos_t *pos)
bitboard_t my_pieces = pos->bb[us][ALL_PIECES];
bitboard_t not_my_pieces = ~my_pieces;
bitboard_t enemy_pieces = pos->bb[them][ALL_PIECES];
bitboard_t occ = my_pieces | enemy_pieces;
bitboard_t empty = ~occ;
@@ -183,59 +182,58 @@ int pos_gen_pseudomoves(pos_t *pos)
move_t *moves = pos->moves.move;
int nmoves = pos->moves.nmoves;
int from, to;
/* king - MUST BE FIRST ! */
bug_on(nmoves != 0);
/* king - MUST BE FIRST (we stop if doubler check) */
from = pos->king[us];
movebits = bb_king_moves(not_my_pieces, from);
bit_for_each64(to, tmp1, movebits) {
bit_for_each64(to, tmp1, movebits & empty) {
moves[nmoves++] = move_make(from, to);
}
bit_for_each64(to, tmp1, movebits & enemy_pieces) {
moves[nmoves++] = move_make_capture(from, to);
}
if (popcount64(pos->checkers) > 1) /* double check, we stop here */
return (pos->moves.nmoves = nmoves);
/* sliding pieces */
bit_for_each64(from, tmp1, pos->bb[us][BISHOP]) {
bit_for_each64(from, tmp1, pos->bb[us][BISHOP] | pos->bb[us][QUEEN]) {
movebits = hyperbola_bishop_moves(occ, from) & not_my_pieces;
bit_for_each64(to, tmp2, movebits) {
bit_for_each64(to, tmp2, movebits & empty) {
moves[nmoves++] = move_make(from, to);
}
bit_for_each64(to, tmp2, movebits & enemy_pieces) {
moves[nmoves++] = move_make_capture(from, to);
}
}
bit_for_each64(from, tmp1, pos->bb[us][ROOK]) {
bit_for_each64(from, tmp1, pos->bb[us][ROOK] | pos->bb[us][QUEEN]) {
// printf("rook=%d/%s\n", from, sq_to_string(from));
movebits = hyperbola_rook_moves(occ, from) & not_my_pieces;
bit_for_each64(to, tmp2, movebits) {
bit_for_each64(to, tmp2, movebits & empty) {
moves[nmoves++] = move_make(from, to);
}
}
/* TODO: remove this one, after movegen is validated */
bit_for_each64(from, tmp1, pos->bb[us][QUEEN]) {
movebits = hyperbola_queen_moves(occ, from) & not_my_pieces;
bit_for_each64(to, tmp2, movebits) {
moves[nmoves++] = move_make(from, to);
bit_for_each64(to, tmp2, movebits & enemy_pieces) {
moves[nmoves++] = move_make_capture(from, to);
}
}
/* knight */
bit_for_each64(from, tmp1, pos->bb[us][KNIGHT]) {
movebits = bb_knight_moves(not_my_pieces, from);
bit_for_each64(to, tmp2, movebits) {
bit_for_each64(to, tmp2, movebits & empty) {
moves[nmoves++] = move_make(from, to);
}
bit_for_each64(to, tmp2, movebits & enemy_pieces) {
moves[nmoves++] = move_make_capture(from, to);
}
}
/* pawn: relative rank and files */
bitboard_t rel_rank7 = us == WHITE ? RANK_7bb : RANK_2bb;
bitboard_t rel_rank3 = us == WHITE ? RANK_3bb : RANK_6bb;
//printf("r7_o = %016lx\nr7_n = %016lx\nsize=%lu\n", rel_rank7, BB_REL_RANK(RANK_7, me),
// sizeof(RANK_3bb));
//printf("r3_o = %016lx\nr3_n = %016lx\nsize=%lu\n", rel_rank3, BB_REL_RANK(RANK_3, me),
// sizeof(RANK_3bb));
//printf("fc_o = %016lx\nfc_n = %016lx\nsize=%lu\n", FILE_Cbb, BB_REL_FILE(FILE_C, me),
// sizeof(RANK_3bb));
//bitboard_t rel_filea = (me == WHITE ? FILE_Abb : FILE_Hbb);
//bitboard_t rel_fileh = (me == WHITE ? FILE_Hbb : FILE_Abb);
/* pawn: ranks 2-6 push 1 and 2 squares */
movebits = pawn_shift_up(pos->bb[us][PAWN] & ~rel_rank7, us) & empty;