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Don't save eval score in TT

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This patch completes the removal of eval info
in TT table.

No functional change.
This commit is contained in:
Marco Costalba 2012-12-01 15:18:08 +01:00
parent 2a585b63b8
commit 98cd8239cc
3 changed files with 12 additions and 28 deletions
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24
src/search.cpp
View file

@ -1037,8 +1037,7 @@ split_point_start: // At split points actual search starts from here
if (bestValue >= beta) // Failed high
{
TT.store(posKey, value_to_tt(bestValue, ss->ply), BOUND_LOWER, depth,
bestMove, ss->staticEval, ss->evalMargin);
TT.store(posKey, value_to_tt(bestValue, ss->ply), BOUND_LOWER, depth, bestMove);
if (!pos.is_capture_or_promotion(bestMove) && !inCheck)
{
@ -1063,7 +1062,7 @@ split_point_start: // At split points actual search starts from here
else // Failed low or PV search
TT.store(posKey, value_to_tt(bestValue, ss->ply),
PvNode && bestMove != MOVE_NONE ? BOUND_EXACT : BOUND_UPPER,
depth, bestMove, ss->staticEval, ss->evalMargin);
depth, bestMove);
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);
@ -1143,8 +1142,7 @@ split_point_start: // At split points actual search starts from here
if (bestValue >= beta)
{
if (!tte)
TT.store(pos.key(), value_to_tt(bestValue, ss->ply), BOUND_LOWER,
DEPTH_NONE, MOVE_NONE, ss->staticEval, ss->evalMargin);
TT.store(pos.key(), value_to_tt(bestValue, ss->ply), BOUND_LOWER, DEPTH_NONE, MOVE_NONE);
return bestValue;
}
@ -1252,9 +1250,7 @@ split_point_start: // At split points actual search starts from here
}
else // Fail high
{
TT.store(posKey, value_to_tt(value, ss->ply), BOUND_LOWER,
ttDepth, move, ss->staticEval, ss->evalMargin);
TT.store(posKey, value_to_tt(value, ss->ply), BOUND_LOWER, ttDepth, move);
return value;
}
}
@ -1268,7 +1264,7 @@ split_point_start: // At split points actual search starts from here
TT.store(posKey, value_to_tt(bestValue, ss->ply),
PvNode && bestValue > oldAlpha ? BOUND_EXACT : BOUND_UPPER,
ttDepth, bestMove, ss->staticEval, ss->evalMargin);
ttDepth, bestMove);
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);
@ -1559,20 +1555,12 @@ void RootMove::insert_pv_in_tt(Position& pos) {
StateInfo state[MAX_PLY_PLUS_2], *st = state;
TTEntry* tte;
int ply = 0;
Value v, m;
do {
tte = TT.probe(pos.key());
if (!tte || tte->move() != pv[ply]) // Don't overwrite correct entries
{
if (pos.in_check())
v = m = VALUE_NONE;
else
v = evaluate(pos, m);
TT.store(pos.key(), VALUE_NONE, BOUND_NONE, DEPTH_NONE, pv[ply], v, m);
}
TT.store(pos.key(), VALUE_NONE, BOUND_NONE, DEPTH_NONE, pv[ply]);
assert(pos.move_is_legal(pv[ply]));
pos.do_move(pv[ply++], *st++);

6
src/tt.cpp
View file

@ -82,7 +82,7 @@ void TranspositionTable::clear() {
/// more valuable than a TTEntry t2 if t1 is from the current search and t2 is from
/// a previous search, or if the depth of t1 is bigger than the depth of t2.
void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move m, Value statV, Value kingD) {
void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move m) {
int c1, c2, c3;
TTEntry *tte, *replace;
@ -98,7 +98,7 @@ void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move
if (m == MOVE_NONE)
m = tte->move();
tte->save(posKey32, v, t, d, m, generation, statV, kingD);
tte->save(posKey32, v, t, d, m, generation);
return;
}
@ -110,7 +110,7 @@ void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move
if (c1 + c2 + c3 > 0)
replace = tte;
}
replace->save(posKey32, v, t, d, m, generation, statV, kingD);
replace->save(posKey32, v, t, d, m, generation);
}

10
src/tt.h
View file

@ -44,7 +44,7 @@
class TTEntry {
public:
void save(uint32_t k, Value v, Bound b, Depth d, Move m, int g, Value statV, Value statM) {
void save(uint32_t k, Value v, Bound b, Depth d, Move m, int g) {
key32 = (uint32_t)k;
move16 = (uint16_t)m;
@ -52,8 +52,6 @@ public:
generation8 = (uint8_t)g;
value16 = (int16_t)v;
depth16 = (int16_t)d;
staticValue = (int16_t)statV;
staticMargin = (int16_t)statM;
}
void set_generation(int g) { generation8 = (uint8_t)g; }
@ -63,14 +61,12 @@ public:
Value value() const { return (Value)value16; }
Bound type() const { return (Bound)bound; }
int generation() const { return (int)generation8; }
Value static_value() const { return (Value)staticValue; }
Value static_value_margin() const { return (Value)staticMargin; }
private:
uint32_t key32;
uint16_t move16;
uint8_t bound, generation8;
int16_t value16, depth16, staticValue, staticMargin;
int16_t value16, depth16;
};
@ -100,7 +96,7 @@ public:
~TranspositionTable();
void set_size(size_t mbSize);
void clear();
void store(const Key posKey, Value v, Bound type, Depth d, Move m, Value statV, Value kingD);
void store(const Key posKey, Value v, Bound type, Depth d, Move m);
TTEntry* probe(const Key posKey) const;
void new_search();
TTEntry* first_entry(const Key posKey) const;