Super fast hidden_checkers()

[stockfish] / src / position.h

diff --git a/src/position.h b/src/position.h
index bd59b5c959d624c90c66a63f943a04f33d19fd0b..ac63c11c36e612a09aa59b4e779b39bc1c74fb2e 100644 (file)
--- a/src/position.h
+++ b/src/position.h
@@ -79,14 +79,15 @@ enum CastleRights {
 /// must be passed as a parameter.
 
 struct StateInfo {
-  Bitboard checkersBB;
   Key key, pawnKey, materialKey;
   int castleRights, rule50;
   Square epSquare;
   Value mgValue, egValue;
+
   PieceType capture;
-  StateInfo* previous;
+  Bitboard checkersBB;
   Move lastMove;
+  StateInfo* previous;
 };
 
 
@@ -311,8 +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;
@@ -565,6 +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;
 }