Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
- Copyright (C) 2015-2017 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+ Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
class TranspositionTable {
- static const int CacheLineSize = 64;
- static const int ClusterSize = 3;
+ static constexpr int CacheLineSize = 64;
+ static constexpr int ClusterSize = 3;
struct Cluster {
TTEntry entry[ClusterSize];
void resize(size_t mbSize);
void clear();
- // The lowest order bits of the key are used to get the index of the cluster
+ // The 32 lowest order bits of the key are used to get the index of the cluster
TTEntry* first_entry(const Key key) const {
- return &table[(size_t)key & (clusterCount - 1)].entry[0];
+ return &table[(uint32_t(key) * uint64_t(clusterCount)) >> 32].entry[0];
}
private: