X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Ftt.h;h=3113751adb938e868616efe6a8eb78c15e946b43;hb=002062ae934c1fae3e56157e8e7e6451b552ada5;hp=1caa277e821ac0463110fe0df6487b74f7e20f79;hpb=481eda4ca0121cfa16f5a29f364ca30ee2852409;p=stockfish
diff --git a/src/tt.h b/src/tt.h
index 1caa277e..3113751a 100644
--- a/src/tt.h
+++ b/src/tt.h
@@ -17,51 +17,43 @@
along with this program. If not, see .
*/
-#if !defined(TT_H_INCLUDED)
+#ifndef TT_H_INCLUDED
#define TT_H_INCLUDED
#include "misc.h"
#include "types.h"
-/// The TTEntry is the class of transposition table entries
+/// The TTEntry is the 128 bit transposition table entry, defined as below:
///
-/// A TTEntry needs 128 bits to be stored
-///
-/// bit 0-31: key
-/// bit 32-63: data
-/// bit 64-79: value
-/// bit 80-95: depth
-/// bit 96-111: static value
-/// bit 112-127: margin of static value
-///
-/// the 32 bits of the data field are so defined
-///
-/// bit 0-15: move
-/// bit 16-20: not used
-/// bit 21-22: value type
-/// bit 23-31: generation
+/// key: 32 bit
+/// move: 16 bit
+/// bound type: 8 bit
+/// generation: 8 bit
+/// value: 16 bit
+/// depth: 16 bit
+/// static value: 16 bit
+/// static margin: 16 bit
-class TTEntry {
+struct TTEntry {
-public:
void save(uint32_t k, Value v, Bound b, Depth d, Move m, int g, Value ev, Value em) {
key32 = (uint32_t)k;
move16 = (uint16_t)m;
- bound = (uint8_t)b;
+ bound8 = (uint8_t)b;
generation8 = (uint8_t)g;
value16 = (int16_t)v;
depth16 = (int16_t)d;
evalValue = (int16_t)ev;
evalMargin = (int16_t)em;
}
- void set_generation(int g) { generation8 = (uint8_t)g; }
+ void set_generation(uint8_t g) { generation8 = g; }
uint32_t key() const { return key32; }
Depth depth() const { return (Depth)depth16; }
Move move() const { return (Move)move16; }
Value value() const { return (Value)value16; }
- Bound type() const { return (Bound)bound; }
+ Bound bound() const { return (Bound)bound8; }
int generation() const { return (int)generation8; }
Value eval_value() const { return (Value)evalValue; }
Value eval_margin() const { return (Value)evalMargin; }
@@ -69,7 +61,7 @@ public:
private:
uint32_t key32;
uint16_t move16;
- uint8_t bound, generation8;
+ uint8_t bound8, generation8;
int16_t value16, depth16, evalValue, evalMargin;
};
@@ -88,7 +80,7 @@ public:
~TranspositionTable() { free(mem); }
void new_search() { generation++; }
- TTEntry* probe(const Key key) const;
+ const TTEntry* probe(const Key key) const;
TTEntry* first_entry(const Key key) const;
void refresh(const TTEntry* tte) const;
void set_size(size_t mbSize);
@@ -99,7 +91,7 @@ private:
uint32_t hashMask;
TTEntry* table;
void* mem;
- uint8_t generation; // Size must be not bigger then TTEntry::generation8
+ uint8_t generation; // Size must be not bigger than TTEntry::generation8
};
extern TranspositionTable TT;
@@ -123,4 +115,4 @@ inline void TranspositionTable::refresh(const TTEntry* tte) const {
const_cast(tte)->set_generation(generation);
}
-#endif // !defined(TT_H_INCLUDED)
+#endif // #ifndef TT_H_INCLUDED