X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftt.h;h=bcc761acf325da0999838b2f209cb4faab92bb33;hp=c8f7d548fbda4a663fec02014fba347cf2d79ab6;hb=47ee6d9fa4091aa05f6fedb62a2bb652b0422f08;hpb=226bd540642a5f091a80e4b01ea4d4c160558a22

diff --git a/src/tt.h b/src/tt.h
index c8f7d548..bcc761ac 100644
--- a/src/tt.h
+++ b/src/tt.h
@@ -53,29 +53,32 @@
 class TTEntry {
 
 public:
-  TTEntry() {}
-  TTEntry(uint32_t k, Value v, ValueType t, Depth d, Move m, int generation,
-          Value statV, Value kingD)
-        : key_ (k), data((m & 0x1FFFF) | (t << 20) | (generation << 23)),
-          value_(int16_t(v)), depth_(int16_t(d)),
-          staticValue_(int16_t(statV)), kingDanger_(int16_t(kingD)) {}
-
-  uint32_t key() const { return key_; }
-  Depth depth() const { return Depth(depth_); }
+  void save(uint32_t k, Value v, ValueType t, Depth d, Move m, int g, Value statV, Value kd) {
+
+      key32 = k;
+      data = (m & 0x1FFFF) | (t << 20) | (g << 23);
+      value16     = int16_t(v);
+      depth16     = int16_t(d);
+      staticValue = int16_t(statV);
+      kingDanger  = int16_t(kd);
+  }
+
+  uint32_t key() const { return key32; }
+  Depth depth() const { return Depth(depth16); }
   Move move() const { return Move(data & 0x1FFFF); }
-  Value value() const { return Value(value_); }
+  Value value() const { return Value(value16); }
   ValueType type() const { return ValueType((data >> 20) & 7); }
-  int generation() const { return (data >> 23); }
-  Value static_value() const { return Value(staticValue_); }
-  Value king_danger() const { return Value(kingDanger_); }
+  int generation() const { return data >> 23; }
+  Value static_value() const { return Value(staticValue); }
+  Value king_danger() const { return Value(kingDanger); }
 
 private:
-  uint32_t key_;
+  uint32_t key32;
   uint32_t data;
-  int16_t value_;
-  int16_t depth_;
-  int16_t staticValue_;
-  int16_t kingDanger_;
+  int16_t value16;
+  int16_t depth16;
+  int16_t staticValue;
+  int16_t kingDanger;
 };
 
 
@@ -83,12 +86,12 @@ private:
 const int ClusterSize = 4;
 
 /// Each group of ClusterSize number of TTEntry form a TTCluster
-/// that is indexed by a single position key. Cluster is padded
-/// to a cache line size so to guarantee always aligned accesses.
+/// that is indexed by a single position key. TTCluster size must
+///  be not bigger then a cache line size, in case it is less then
+/// it should be padded to guarantee always aligned accesses.
 
 struct TTCluster {
   TTEntry data[ClusterSize];
-  char cache_line_padding[64 - sizeof(TTEntry[ClusterSize])];
 };
 
 
@@ -105,15 +108,13 @@ public:
   void clear();
   void store(const Key posKey, Value v, ValueType type, Depth d, Move m, Value statV, Value kingD);
   TTEntry* retrieve(const Key posKey) const;
-  void prefetch(const Key posKey) const;
   void new_search();
   void insert_pv(const Position& pos, Move pv[]);
   void extract_pv(const Position& pos, Move pv[], const int PLY_MAX);
   int full() const;
+  TTEntry* first_entry(const Key posKey) const;
 
 private:
-  inline TTEntry* first_entry(const Key posKey) const;
-
   // Be sure 'writes' is at least one cache line away
   // from read only variables.
   unsigned char pad_before[64 - sizeof(unsigned)];
@@ -127,4 +128,14 @@ private:
 
 extern TranspositionTable TT;
 
+
+/// TranspositionTable::first_entry returns a pointer to the first
+/// entry of a cluster given a position. The low 32 bits of the key
+/// are used to get the index in the table.
+
+inline TTEntry* TranspositionTable::first_entry(const Key posKey) const {
+
+  return entries[uint32_t(posKey) & (size - 1)].data;
+}
+
 #endif // !defined(TT_H_INCLUDED)