X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Ftt.cpp;h=19de55ae3cbf55d15eb6624909114f843076739c;hb=856a5f3aaaf8b9d53599963decacd4476b55c034;hp=bb49a824519a52b97828b1a6055d2e12cc8f198b;hpb=f6f1d2422303923927c0c088dee1d6df22dc4b98;p=stockfish

diff --git a/src/tt.cpp b/src/tt.cpp
index bb49a824..19de55ae 100644
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -32,6 +32,8 @@ TranspositionTable TT; // Our global transposition table
 
 void TranspositionTable::resize(size_t mbSize) {
 
+  assert(sizeof(Cluster) == CacheLineSize / 2);
+
   size_t newClusterCount = size_t(1) << msb((mbSize * 1024 * 1024) / sizeof(Cluster));
 
   if (newClusterCount == clusterCount)
@@ -94,3 +96,20 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
 
   return found = false, replace;
 }
+
+
+/// Returns an approximation of the hashtable occupation during a search. The
+/// hash is x permill full, as per UCI protocol.
+
+int TranspositionTable::hashfull() const
+{
+  int cnt = 0;
+  for (int i = 0; i < 1000 / ClusterSize; i++)
+  {
+      const TTEntry* tte = &table[i].entry[0];
+      for (int j = 0; j < ClusterSize; j++)
+          if ((tte[j].genBound8 & 0xFC) == generation8)
+              cnt++;
+  }
+  return cnt;
+}