X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.h;h=3614439fca05cdb6df7a3bad6833dfdad3d33024;hp=e1a2e6df18d3386623ddce7ca77d4023f6a081ec;hb=9da3b44ddc7bc9ea7094b91663cbc0f8319c46be;hpb=c80d52c845357db880817d6ed91d02986b5d5384

diff --git a/src/movepick.h b/src/movepick.h
index e1a2e6df..3614439f 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -33,21 +33,25 @@
 /// during the current search, and is used for reduction and move ordering decisions.
 struct HistoryStats {
 
-  static const Value Max = Value(1 << 28);
+  static const int Max = 1 << 28;
 
-  Value get(Color c, Move m) const { return table[c][from_sq(m)][to_sq(m)]; }
+  int get(Color c, Move m) const { return table[c][from_sq(m)][to_sq(m)]; }
   void clear() { std::memset(table, 0, sizeof(table)); }
-  void update(Color c, Move m, Value v) {
+  void update(Color c, Move m, int v) {
 
     Square from = from_sq(m);
     Square to = to_sq(m);
 
-    table[c][from][to] -= table[c][from][to] * abs(int(v)) / 324;
+    const int denom = 324;
+
+    assert(abs(int(v)) <= denom); // Needed for stability.
+
+    table[c][from][to] -= table[c][from][to] * abs(int(v)) / denom;
     table[c][from][to] += int(v) * 32;
   }
 
 private:
-  Value table[COLOR_NB][SQUARE_NB][SQUARE_NB];
+  int table[COLOR_NB][SQUARE_NB][SQUARE_NB];
 };
 
 
@@ -62,10 +66,15 @@ struct Stats {
   const T* operator[](Piece pc) const { return table[pc]; }
   T* operator[](Piece pc) { return table[pc]; }
   void clear() { std::memset(table, 0, sizeof(table)); }
+  void fill(const int& v) { std::fill(&table[0][0], &table[PIECE_NB-1][SQUARE_NB-1]+1, v); };
   void update(Piece pc, Square to, Move m) { table[pc][to] = m; }
-  void update(Piece pc, Square to, Value v) {
+  void update(Piece pc, Square to, int v) {
+
+    const int denom = 936;
+
+    assert(abs(int(v)) <= denom); // Needed for stability.
 
-    table[pc][to] -= table[pc][to] * abs(int(v)) / 936;
+    table[pc][to] -= table[pc][to] * abs(int(v)) / denom;
     table[pc][to] += int(v) * 32;
   }
 
@@ -74,7 +83,7 @@ private:
 };
 
 typedef Stats<Move> MoveStats;
-typedef Stats<Value> CounterMoveStats;
+typedef Stats<int> CounterMoveStats;
 typedef Stats<CounterMoveStats> CounterMoveHistoryStats;
 
 
@@ -95,7 +104,7 @@ public:
   MovePicker(const Position&, Move, Depth, Square);
   MovePicker(const Position&, Move, Depth, Search::Stack*);
 
-  Move next_move();
+  Move next_move(bool skipQuiets = false);
 
 private:
   template<GenType> void score();