//// Types
////
-/// The TTEntry class is the class of transposition table entries.
+/// The TTEntry class is the class of transposition table entries
+///
+/// A TTEntry needs 128 bits to be stored
+///
+/// bit 0-63: key
+/// bit 64-95: data
+/// bit 96-111: value
+/// bit 112-127: depth
+///
+/// the 32 bits of the data field are so defined
+///
+/// bit 0-16: move
+/// bit 17-19: not used
+/// bit 20-22: value type
+/// bit 23-31: generation
class TTEntry {
TTEntry(Key k, Value v, ValueType t, Depth d, Move m, int generation);
Key key() const { return key_; }
Depth depth() const { return Depth(depth_); }
- Move move() const { return Move(data & 0x7FFFF); }
+ Move move() const { return Move(data & 0x1FFFF); }
Value value() const { return Value(value_); }
- ValueType type() const { return ValueType((data >> 20) & 3); }
+ ValueType type() const { return ValueType((data >> 20) & 7); }
int generation() const { return (data >> 23); }
private:
void set_size(unsigned mbSize);
void clear();
void store(const Position &pos, Value v, Depth d, Move m, ValueType type);
- const TTEntry* retrieve(const Position &pos) const;
+ TTEntry* retrieve(const Position &pos) const;
void new_search();
void insert_pv(const Position &pos, Move pv[]);
int full();