#include "misc.h"
#include "types.h"
-/// The TTEntry is the 128 bit transposition table entry, defined as below:
+/// The TTEntry is the 14 bytes transposition table entry, defined as below:
///
-/// key: 32 bit
-/// move: 16 bit
-/// bound type: 8 bit
-/// generation: 8 bit
-/// value: 16 bit
-/// depth: 16 bit
-/// static value: 16 bit
-/// static margin: 16 bit
+/// key 32 bit
+/// move 16 bit
+/// bound type 8 bit
+/// generation 8 bit
+/// value 16 bit
+/// depth 16 bit
+/// eval value 16 bit
struct TTEntry {
- void save(uint32_t k, Value v, Bound b, Depth d, Move m, int g, Value ev) {
+ Move move() const { return (Move )move16; }
+ Bound bound() const { return (Bound)bound8; }
+ Value value() const { return (Value)value16; }
+ Depth depth() const { return (Depth)depth16; }
+ Value eval_value() const { return (Value)evalValue; }
- key32 = (uint32_t)k;
- move16 = (uint16_t)m;
- bound8 = (uint8_t)b;
- generation8 = (uint8_t)g;
- value16 = (int16_t)v;
- depth16 = (int16_t)d;
- evalValue = (int16_t)ev;
- }
- void set_generation(uint8_t g) { generation8 = g; }
+private:
+ friend class TranspositionTable;
- uint32_t key() const { return key32; }
- Depth depth() const { return (Depth)depth16; }
- Move move() const { return (Move)move16; }
- Value value() const { return (Value)value16; }
- Bound bound() const { return (Bound)bound8; }
- int generation() const { return (int)generation8; }
- Value eval_value() const { return (Value)evalValue; }
+ void save(uint32_t k, Value v, Bound b, Depth d, Move m, uint8_t g, Value ev) {
+
+ key32 = (uint32_t)k;
+ move16 = (uint16_t)m;
+ bound8 = (uint8_t)b;
+ generation8 = (uint8_t)g;
+ value16 = (int16_t)v;
+ depth16 = (int16_t)d;
+ evalValue = (int16_t)ev;
+ }
-private:
uint32_t key32;
uint16_t move16;
uint8_t bound8, generation8;
class TranspositionTable {
- static const unsigned ClusterSize = 4; // A cluster is 64 Bytes
+ static const unsigned ClusterSize = 4;
public:
~TranspositionTable() { free(mem); }
const TTEntry* probe(const Key key) const;
TTEntry* first_entry(const Key key) const;
- void refresh(const TTEntry* tte) const;
- void set_size(size_t mbSize);
+ void resize(uint64_t mbSize);
void clear();
void store(const Key key, Value v, Bound type, Depth d, Move m, Value statV);
return table + ((uint32_t)key & hashMask);
}
-
-/// TranspositionTable::refresh() updates the 'generation' value of the TTEntry
-/// to avoid aging. It is normally called after a TT hit.
-
-inline void TranspositionTable::refresh(const TTEntry* tte) const {
-
- const_cast<TTEntry*>(tte)->set_generation(generation);
-}
-
#endif // #ifndef TT_H_INCLUDED