void TranspositionTable::set_size(size_t mbSize) {
- size_t newSize = 1ULL << msb((mbSize << 20) / sizeof(TTEntry[ClusterSize]));
+ assert(msb((mbSize << 20) / sizeof(TTEntry)) < 32);
- if (newSize == size)
+ uint32_t size = ClusterSize << msb((mbSize << 20) / sizeof(TTEntry[ClusterSize]));
+
+ if (hashMask == size - ClusterSize)
return;
- size = newSize;
- delete [] entries;
- entries = new (std::nothrow) TTEntry[size * ClusterSize];
+ hashMask = size - ClusterSize;
+ delete [] table;
+ table = new (std::nothrow) TTEntry[size];
- if (!entries)
+ if (!table)
{
std::cerr << "Failed to allocate " << mbSize
<< "MB for transposition table." << std::endl;
void TranspositionTable::clear() {
- memset(entries, 0, size * sizeof(TTEntry[ClusterSize]));
+ memset(table, 0, (hashMask + ClusterSize) * sizeof(TTEntry));
}