X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.h;h=86708488cb276f6c13ce40d768d7bda7991d3485;hp=900b0925451c545fe79e5668ede1638bcd43776f;hb=631fa6a1006e487a47b0feb662e5365f9258a2ef;hpb=7b721b3663920a2b74039ad6588ba4ed638c368b

diff --git a/src/pawns.h b/src/pawns.h
index 900b0925..86708488 100644
--- a/src/pawns.h
+++ b/src/pawns.h
@@ -26,6 +26,7 @@
 ////
 
 #include "bitboard.h"
+#include "position.h"
 #include "value.h"
 
 ////
@@ -40,33 +41,30 @@ const int PawnTableSize = 16384;
 /// to add further information in the future. A lookup to the pawn hash table
 /// (performed by calling the get_pawn_info method in a PawnInfoTable object)
 /// returns a pointer to a PawnInfo object.
-class Position;
-
 class PawnInfo {
 
   friend class PawnInfoTable;
 
 public:
   Score pawns_value() const;
-  Value kingside_storm_value(Color c) const;
-  Value queenside_storm_value(Color c) const;
   Bitboard pawn_attacks(Color c) const;
   Bitboard passed_pawns(Color c) const;
   int file_is_half_open(Color c, File f) const;
   int has_open_file_to_left(Color c, File f) const;
   int has_open_file_to_right(Color c, File f) const;
-  Score king_shelter(const Position& pos, Color c, Square ksq);
+
+  template<Color Us>
+  Score king_shelter(const Position& pos, Square ksq);
 
 private:
-  Score updateShelter(const Position& pos, Color c, Square ksq);
+  template<Color Us>
+  Score updateShelter(const Position& pos, Square ksq);
 
   Key key;
   Bitboard passedPawns[2];
   Bitboard pawnAttacks[2];
   Square kingSquares[2];
   Score value;
-  int ksStormValue[2];
-  int qsStormValue[2];
   int halfOpenFiles[2];
   Score kingShelters[2];
 };
@@ -80,6 +78,9 @@ class PawnInfoTable {
 
   enum SideType { KingSide, QueenSide };
 
+  PawnInfoTable(const PawnInfoTable&);
+  PawnInfoTable& operator=(const PawnInfoTable&);
+
 public:
   PawnInfoTable();
   ~PawnInfoTable();
@@ -90,9 +91,6 @@ private:
   template<Color Us>
   Score evaluate_pawns(const Position& pos, Bitboard ourPawns, Bitboard theirPawns, PawnInfo* pi) const;
 
-  template<Color Us, SideType Side>
-  int evaluate_pawn_storm(Square s, Rank r, File f, Bitboard theirPawns) const;
-
   PawnInfo* entries;
 };
 
@@ -116,14 +114,6 @@ inline Bitboard PawnInfo::pawn_attacks(Color c) const {
   return pawnAttacks[c];
 }
 
-inline Value PawnInfo::kingside_storm_value(Color c) const {
-  return Value(ksStormValue[c]);
-}
-
-inline Value PawnInfo::queenside_storm_value(Color c) const {
-  return Value(qsStormValue[c]);
-}
-
 inline Bitboard PawnInfo::passed_pawns(Color c) const {
   return passedPawns[c];
 }
@@ -140,8 +130,34 @@ inline int PawnInfo::has_open_file_to_right(Color c, File f) const {
   return halfOpenFiles[c] & ~((1 << int(f+1)) - 1);
 }
 
-inline Score PawnInfo::king_shelter(const Position& pos, Color c, Square ksq) {
-  return kingSquares[c] == ksq ? kingShelters[c] : updateShelter(pos, c, ksq);
+/// PawnInfo::updateShelter() calculates and caches king shelter. It is called
+/// only when king square changes, about 20% of total king_shelter() calls.
+template<Color Us>
+Score PawnInfo::updateShelter(const Position& pos, Square ksq) {
+
+  const int Shift = (Us == WHITE ? 8 : -8);
+
+  Bitboard pawns;
+  int r, shelter = 0;
+
+  if (relative_rank(Us, ksq) <= RANK_4)
+  {
+      pawns = pos.pieces(PAWN, Us) & this_and_neighboring_files_bb(ksq);
+      r = square_rank(ksq) * 8;
+      for (int i = 1; i < 4; i++)
+      {
+          r += Shift;
+          shelter += BitCount8Bit[(pawns >> r) & 0xFF] * (128 >> i);
+      }
+  }
+  kingSquares[Us] = ksq;
+  kingShelters[Us] = make_score(shelter, 0);
+  return kingShelters[Us];
+}
+
+template<Color Us>
+inline Score PawnInfo::king_shelter(const Position& pos, Square ksq) {
+  return kingSquares[Us] == ksq ? kingShelters[Us] : updateShelter<Us>(pos, ksq);
 }
 
 #endif // !defined(PAWNS_H_INCLUDED)