bruno/brchess
1
0
Fork 0
Code Issues 9 Projects Releases Wiki Activity

replace pawn_shift_xxx with bb_pawns_attacks

Browse Source
This commit is contained in:
Bruno Raoult
2024-05-28 09:40:20 +02:00
parent 972046351b
commit ec64e2e44d
9 changed files with 85 additions and 151 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
src/move-gen.c
View File

@@ -96,17 +96,14 @@ bool pseudo_is_legal(const pos_t *pos, const move_t move)
* would discover a R/Q horizontal check.
*/
if (is_enpassant(move)) {
bitboard_t rank5 = us == WHITE? RANK_5bb: RANK_4bb;
bitboard_t rank5 = bb_rel_rank(RANK_1, us);
if ((pos->bb[us][KING] & rank5)) {
bitboard_t exclude = BIT(pos->en_passant - sq_up(us)) | BIT(from);
bitboard_t rooks = (pos->bb[them][ROOK] | pos->bb[them][QUEEN]) & rank5;
while (rooks) {
square_t rook = bb_next(&rooks);
if (hyperbola_rank_moves(occ ^ exclude, rook) & kingbb)
return false;
}
if (hyperbola_rank_moves(occ ^ exclude, king) & rooks)
return false;
}
}
return true;
@@ -467,62 +464,25 @@ movelist_t *pos_gen_pseudo(pos_t *pos, movelist_t *movelist)
}
/* pawn: captures */
/*
* tmp_bb = pawn_attacks_bb(pos->bb[us][PAWN], us) & enemy_pieces;
* //bb_print("FAIL", tmp_bb);
* to_bb = tmp_bb & ~rel_rank8;
* while (to_bb) {
* to = bb_next(&to_bb);
* from_bb = bb_pawn_attacks[them][to] & pos->bb[us][PAWN];
* while (from_bb) {
* from = bb_next(&from_bb);
* *moves++ = move_make(from, to);
* }
* }
* to_bb = tmp_bb & rel_rank8;
* while (to_bb) {
* to = bb_next(&to_bb);
* from_bb = bb_pawn_attacks[them][to] & pos->bb[us][PAWN];
* while (from_bb) {
* from = bb_next(&from_bb);
* moves = move_make_promotions(moves, from, to);
* }
* }
*/
/* pawn: captures left */
bitboard_t filter = ~bb_rel_file(FILE_A, us);
shift = sq_upleft(us);
tmp_bb = bb_shift(pos->bb[us][PAWN] & filter, shift) & enemy_pieces;
tmp_bb = bb_pawns_attacks(pos->bb[us][PAWN], shift) & enemy_pieces;
//bb_print("FAIL", tmp_bb);
to_bb = tmp_bb & ~rel_rank8;
while (to_bb) {
to = bb_next(&to_bb);
from = to - shift;
*moves++ = move_make(from, to);
from_bb = bb_pawn_attacks[them][to] & pos->bb[us][PAWN];
while (from_bb) {
from = bb_next(&from_bb);
*moves++ = move_make(from, to);
}
}
to_bb = tmp_bb & rel_rank8;
while (to_bb) {
to = bb_next(&to_bb);
from = to - shift;
moves = move_gen_promotions(moves, from, to);
}
/* pawn: captures right */
filter = ~bb_rel_file(FILE_H, us);
shift = sq_upright(us);
tmp_bb = bb_shift(pos->bb[us][PAWN] & filter, shift) & enemy_pieces;
to_bb = tmp_bb & ~rel_rank8;
while (to_bb) {
to = bb_next(&to_bb);
from = to - shift;
*moves++ = move_make(from, to);
}
to_bb = tmp_bb & rel_rank8;
while (to_bb) {
to = bb_next(&to_bb);
from = to - shift;
moves = move_gen_promotions(moves, from, to);
from_bb = bb_pawn_attacks[them][to] & pos->bb[us][PAWN];
while (from_bb) {
from = bb_next(&from_bb);
moves = move_gen_promotions(moves, from, to);
}
}
/* pawn: en-passant