/// A TranspositionTable consists of a power of 2 number of clusters and each
-/// cluster consists of TTClusterSize number of TTEntry. Each non-empty entry
+/// cluster consists of ClusterSize number of TTEntry. Each non-empty entry
/// contains information of exactly one position. The size of a cluster should
/// not be bigger than a cache line size. In case it is less, it should be padded
/// to guarantee always aligned accesses.
class TranspositionTable {
static const int CacheLineSize = 64;
- static const int TTClusterSize = 3;
+ static const int ClusterSize = 3;
struct Cluster {
- TTEntry entry[TTClusterSize];
+ TTEntry entry[ClusterSize];
char padding[2]; // Align to the cache line size
};
+ static_assert(sizeof(Cluster) == CacheLineSize / 2, "Cluster size incorrect");
+
public:
~TranspositionTable() { free(mem); }
void new_search() { generation8 += 4; } // Lower 2 bits are used by Bound
uint8_t generation() const { return generation8; }
TTEntry* probe(const Key key, bool& found) const;
+ int hashfull() const;
void resize(size_t mbSize);
void clear();