Introduce separate counter-move tables for inCheck

[stockfish] / src / tt.h

diff --git a/src/tt.h b/src/tt.h
index 62b1193907e3dd7e93fe78ed0884c0f860ed4311..d087cc38f77e2cad94feb67940ccc26c37f06189 100644 (file)
--- a/src/tt.h
+++ b/src/tt.h
@@ -2,7 +2,7 @@
   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) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2019 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
@@ -30,7 +30,8 @@
 /// move       16 bit
 /// value      16 bit
 /// eval value 16 bit
-/// generation  6 bit
+/// generation  5 bit
+/// pv node     1 bit
 /// bound type  2 bit
 /// depth       8 bit
 
@@ -39,9 +40,10 @@ struct TTEntry {
   Move  move()  const { return (Move )move16; }
   Value value() const { return (Value)value16; }
   Value eval()  const { return (Value)eval16; }
-  Depth depth() const { return (Depth)(depth8 * int(ONE_PLY)); }
+  Depth depth() const { return (Depth)depth8 + DEPTH_OFFSET; }
+  bool is_pv() const { return (bool)(genBound8 & 0x4); }
   Bound bound() const { return (Bound)(genBound8 & 0x3); }
-  void save(Key k, Value v, Bound b, Depth d, Move m, Value ev);
+  void save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev);
 
 private:
   friend class TranspositionTable;
@@ -51,7 +53,7 @@ private:
   int16_t  value16;
   int16_t  eval16;
   uint8_t  genBound8;
-  int8_t   depth8;
+  uint8_t  depth8;
 };
 
 
@@ -76,7 +78,7 @@ class TranspositionTable {
 
 public:
  ~TranspositionTable() { free(mem); }
-  void new_search() { generation8 += 4; } // Lower 2 bits are used by Bound
+  void new_search() { generation8 += 8; } // Lower 3 bits are used by PV flag and Bound
   TTEntry* probe(const Key key, bool& found) const;
   int hashfull() const;
   void resize(size_t mbSize);