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Super fast hidden_checkers()

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Rewritten hidden_checkers() to avoid calling
sliders attacks functions but just a much
faster squares_between()

Also a good code semplification.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-03-04 12:04:28 +01:00
parent 02cd96e4c2
commit 68e711aac6
2 changed files with 35 additions and 58 deletions
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12
src/position.h
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@@ -312,8 +312,8 @@ private:
template<PieceType Piece>
void update_checkers(Bitboard* pCheckersBB, Square ksq, Square from, Square to, Bitboard dcCandidates);
template<PieceType Piece, bool FindPinned>
Bitboard hidden_checks(Color c, Square ksq, Bitboard& pinners) const;
template<bool FindPinned>
Bitboard hidden_checkers(Color c) const;
// Computing hash keys from scratch (for initialization and debugging)
Key compute_key() const;
@@ -566,6 +566,14 @@ inline Bitboard Position::checkers() const {
return st->checkersBB;
}
inline Bitboard Position::pinned_pieces(Color c) const {
return hidden_checkers<true>(c);
}
inline Bitboard Position::discovered_check_candidates(Color c) const {
return hidden_checkers<false>(c);
}
inline bool Position::is_check() const {
return st->checkersBB != EmptyBoardBB;
}