/// bit 64-79: value
/// bit 80-95: depth
/// bit 96-111: static value
-/// bit 112-127: king danger value
+/// bit 112-127: margin of static value
///
/// the 32 bits of the data field are so defined
///
key32 = k;
data = (m & 0x1FFFF) | (t << 21) | (g << 23);
- value16 = int16_t(v);
- depth16 = int16_t(d);
- staticValue = int16_t(statV);
- kingDanger = int16_t(kd);
+ value16 = (int16_t)v;
+ depth16 = (int16_t)d;
+ staticValue = (int16_t)statV;
+ staticValueMargin = (int16_t)kd;
}
+ void set_generation(int g) { data = move() | (type() << 21) | (g << 23); }
uint32_t key() const { return key32; }
Depth depth() const { return Depth(depth16); }
ValueType type() const { return ValueType((data >> 21) & 3); }
int generation() const { return data >> 23; }
Value static_value() const { return Value(staticValue); }
- Value king_danger() const { return Value(kingDanger); }
+ Value static_value_margin() const { return Value(staticValueMargin); }
private:
uint32_t key32;
int16_t value16;
int16_t depth16;
int16_t staticValue;
- int16_t kingDanger;
+ int16_t staticValueMargin;
};
class TranspositionTable {
+ TranspositionTable(const TranspositionTable&);
+ TranspositionTable& operator=(const TranspositionTable&);
+
public:
TranspositionTable();
~TranspositionTable();
TTEntry* retrieve(const Key posKey) const;
void new_search();
TTEntry* first_entry(const Key posKey) const;
+ void refresh(const TTEntry* tte) const;
private:
size_t size;
TTCluster* entries;
- uint8_t generation;
+ uint8_t generation; // To properly compare, size must be smaller then TT stored value
};
extern TranspositionTable TT;
inline TTEntry* TranspositionTable::first_entry(const Key posKey) const {
- return entries[uint32_t(posKey) & (size - 1)].data;
+ return entries[((uint32_t)posKey) & (size - 1)].data;
+}
+
+
+/// TranspositionTable::refresh updates the 'generation' value of the TTEntry
+/// to avoid aging. Normally called after a TT hit, before to return.
+
+inline void TranspositionTable::refresh(const TTEntry* tte) const {
+
+ const_cast<TTEntry*>(tte)->set_generation(generation);
}
#endif // !defined(TT_H_INCLUDED)