X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.h;h=fbf6df126d995f7f73bde6d1bec5244826bdfaa1;hp=86708488cb276f6c13ce40d768d7bda7991d3485;hb=7a84b8ca34ee8597920de8e52cae074c31543540;hpb=85a7456bd7e8a1a01cdbfa8f4b6fb563d15a37c6

diff --git a/src/pawns.h b/src/pawns.h
index 86708488..fbf6df12 100644
--- a/src/pawns.h
+++ b/src/pawns.h
@@ -17,21 +17,12 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
 #if !defined(PAWNS_H_INCLUDED)
 #define PAWNS_H_INCLUDED
 
-////
-//// Includes
-////
-
-#include "bitboard.h"
 #include "position.h"
-#include "value.h"
-
-////
-//// Types
-////
+#include "tt.h"
+#include "types.h"
 
 const int PawnTableSize = 16384;
 
@@ -41,6 +32,7 @@ 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 PawnInfo {
 
   friend class PawnInfoTable;
@@ -69,43 +61,20 @@ private:
   Score kingShelters[2];
 };
 
-/// The PawnInfoTable class represents a pawn hash table.  It is basically
-/// just an array of PawnInfo objects and a few methods for accessing these
-/// objects.  The most important method is get_pawn_info, which looks up a
-/// position in the table and returns a pointer to a PawnInfo object.
 
-class PawnInfoTable {
-
-  enum SideType { KingSide, QueenSide };
-
-  PawnInfoTable(const PawnInfoTable&);
-  PawnInfoTable& operator=(const PawnInfoTable&);
+/// The PawnInfoTable class represents a pawn hash table. The most important
+/// method is get_pawn_info, which returns a pointer to a PawnInfo object.
 
+class PawnInfoTable : public SimpleHash<PawnInfo, PawnTableSize> {
 public:
-  PawnInfoTable();
-  ~PawnInfoTable();
   PawnInfo* get_pawn_info(const Position& pos) const;
-  void prefetch(Key key) const;
 
 private:
   template<Color Us>
   Score evaluate_pawns(const Position& pos, Bitboard ourPawns, Bitboard theirPawns, PawnInfo* pi) const;
-
-  PawnInfo* entries;
 };
 
 
-////
-//// Inline functions
-////
-
-inline void PawnInfoTable::prefetch(Key key) const {
-
-    unsigned index = unsigned(key & (PawnTableSize - 1));
-    PawnInfo* pi = entries + index;
-    ::prefetch((char*) pi);
-}
-
 inline Score PawnInfo::pawns_value() const {
   return value;
 }
@@ -119,7 +88,7 @@ inline Bitboard PawnInfo::passed_pawns(Color c) const {
 }
 
 inline int PawnInfo::file_is_half_open(Color c, File f) const {
-  return (halfOpenFiles[c] & (1 << int(f)));
+  return halfOpenFiles[c] & (1 << int(f));
 }
 
 inline int PawnInfo::has_open_file_to_left(Color c, File f) const {
@@ -130,31 +99,6 @@ inline int PawnInfo::has_open_file_to_right(Color c, File f) const {
   return halfOpenFiles[c] & ~((1 << int(f+1)) - 1);
 }
 
-/// 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);