X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftt.cpp;h=6121b3ad771b24bd40410e8e5f6bff6004fdccc7;hp=716d13e0695b9c108ba142879c365f573e027a73;hb=d39bc2efa197ba2fd55b68eced1c60bcfe2facc1;hpb=340e9ea5096fb1c8e4a0914827f1af1d30075039

diff --git a/src/tt.cpp b/src/tt.cpp
index 716d13e0..6121b3ad 100644
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -24,13 +24,16 @@
 
 #include "bitboard.h"
 #include "misc.h"
+#include "thread.h"
 #include "tt.h"
 #include "uci.h"
 
 TranspositionTable TT; // Our global transposition table
 
-/// TTEntry::save saves a TTEntry
-void TTEntry::save(Key k, Value v, Bound b, Depth d, Move m, Value ev) {
+/// TTEntry::save populates the TTEntry with a new node's data, possibly
+/// overwriting an old position. Update is not atomic and can be racy.
+
+void TTEntry::save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev) {
 
   assert(d / ONE_PLY * ONE_PLY == d);
 
@@ -40,14 +43,16 @@ void TTEntry::save(Key k, Value v, Bound b, Depth d, Move m, Value ev) {
 
   // Overwrite less valuable entries
   if (  (k >> 48) != key16
-      || d / ONE_PLY > depth8 - 4
+      ||(d - DEPTH_OFFSET) / ONE_PLY > depth8 - 4
       || b == BOUND_EXACT)
   {
+      assert((d - DEPTH_OFFSET) / ONE_PLY >= 0);
+
       key16     = (uint16_t)(k >> 48);
       value16   = (int16_t)v;
       eval16    = (int16_t)ev;
-      genBound8 = (uint8_t)(TT.generation8 | b);
-      depth8    = (int8_t)(d / ONE_PLY);
+      genBound8 = (uint8_t)(TT.generation8 | uint8_t(pv) << 2 | b);
+      depth8    = (uint8_t)((d - DEPTH_OFFSET) / ONE_PLY);
   }
 }
 
@@ -58,6 +63,8 @@ void TTEntry::save(Key k, Value v, Bound b, Depth d, Move m, Value ev) {
 
 void TranspositionTable::resize(size_t mbSize) {
 
+  Threads.main()->wait_for_search_finished();
+
   clusterCount = mbSize * 1024 * 1024 / sizeof(Cluster);
 
   free(mem);
@@ -82,7 +89,7 @@ void TranspositionTable::clear() {
 
   std::vector<std::thread> threads;
 
-  for (size_t idx = 0; idx < Options["Threads"]; idx++)
+  for (size_t idx = 0; idx < Options["Threads"]; ++idx)
   {
       threads.emplace_back([this, idx]() {
 
@@ -119,7 +126,7 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
   for (int i = 0; i < ClusterSize; ++i)
       if (!tte[i].key16 || tte[i].key16 == key16)
       {
-          tte[i].genBound8 = uint8_t(generation8 | tte[i].bound()); // Refresh
+          tte[i].genBound8 = uint8_t(generation8 | (tte[i].genBound8 & 0x7)); // Refresh
 
           return found = (bool)tte[i].key16, &tte[i];
       }
@@ -128,11 +135,11 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
   TTEntry* replace = tte;
   for (int i = 1; i < ClusterSize; ++i)
       // Due to our packed storage format for generation and its cyclic
-      // nature we add 259 (256 is the modulus plus 3 to keep the lowest
-      // two bound bits from affecting the result) to calculate the entry
+      // nature we add 263 (256 is the modulus plus 7 to keep the unrelated
+      // lowest three bits from affecting the result) to calculate the entry
       // age correctly even after generation8 overflows into the next cycle.
-      if (  replace->depth8 - ((259 + generation8 - replace->genBound8) & 0xFC) * 2
-          >   tte[i].depth8 - ((259 + generation8 -   tte[i].genBound8) & 0xFC) * 2)
+      if (  replace->depth8 - ((263 + generation8 - replace->genBound8) & 0xF8)
+          >   tte[i].depth8 - ((263 + generation8 -   tte[i].genBound8) & 0xF8))
           replace = &tte[i];
 
   return found = false, replace;
@@ -145,12 +152,9 @@ TTEntry* TranspositionTable::probe(const Key key, bool& found) const {
 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;
+  for (int i = 0; i < 1000 / ClusterSize; ++i)
+      for (int j = 0; j < ClusterSize; ++j)
+          cnt += (table[i].entry[j].genBound8 & 0xF8) == generation8;
+
+  return cnt * 1000 / (ClusterSize * (1000 / ClusterSize));
 }