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Simplify stats update

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Simplify code by moving countermove and follow-up move
history update into procedure.

No functional change.
This commit is contained in:
hxim 2016-08-26 19:47:40 +02:00 • committed by Marco Costalba
parent 3e739f883f
commit 9bd856e28e
1 changed files with 20 additions and 38 deletions
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58
src/search.cpp
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@ -168,8 +168,8 @@ namespace {
Value value_to_tt(Value v, int ply);
Value value_from_tt(Value v, int ply);
void update_pv(Move* pv, Move move, Move* childPv);
void update_cm_stats(Stack* ss, Piece pc, Square s, Value bonus);
void update_stats(const Position& pos, Stack* ss, Move move, Move* quiets, int quietsCnt, Value bonus);
void update_opponent_stats(const Position& pos, Stack* ss, Value bonus);
void check_time();
} // namespace
@ -651,7 +651,8 @@ namespace {
if ((ss-1)->moveCount == 1 && !pos.captured_piece_type())
{
Value penalty = Value(d * d + 4 * d + 1);
update_opponent_stats(pos, ss, -penalty);
Square prevSq = to_sq((ss-1)->currentMove);
update_cm_stats(ss-1, pos.piece_on(prevSq), prevSq, -penalty);
}
}
return ttValue;
@ -1141,7 +1142,8 @@ moves_loop: // When in check search starts from here
if ((ss-1)->moveCount == 1 && !pos.captured_piece_type())
{
Value penalty = Value(d * d + 4 * d + 1);
update_opponent_stats(pos, ss, -penalty);
Square prevSq = to_sq((ss-1)->currentMove);
update_cm_stats(ss-1, pos.piece_on(prevSq), prevSq, -penalty);
}
}
// Bonus for prior countermove that caused the fail low
@ -1151,7 +1153,8 @@ moves_loop: // When in check search starts from here
{
int d = depth / ONE_PLY;
Value bonus = Value(d * d + 2 * d - 2);
update_opponent_stats(pos, ss, bonus);
Square prevSq = to_sq((ss-1)->currentMove);
update_cm_stats(ss-1, pos.piece_on(prevSq), prevSq, bonus);
}
tte->save(posKey, value_to_tt(bestValue, ss->ply),
@ -1411,25 +1414,22 @@ moves_loop: // When in check search starts from here
}
// update_opponent_stats() updates countermoves for prior opponent move, i.e.
// (ss-1)->currentMove. Called for both capture and non-capture moves.
// update_cm_stats() updates countermove and follow-up move history
void update_opponent_stats(const Position& pos, Stack* ss, Value bonus) {
void update_cm_stats(Stack* ss, Piece pc, Square s, Value bonus) {
Square prevSq = to_sq((ss-1)->currentMove);
CounterMoveStats* cmh = (ss-2)->counterMoves;
CounterMoveStats* fmh1 = (ss-3)->counterMoves;
CounterMoveStats* fmh2 = (ss-5)->counterMoves;
CounterMoveStats* cmh = (ss-1)->counterMoves;
CounterMoveStats* fmh1 = (ss-2)->counterMoves;
CounterMoveStats* fmh2 = (ss-4)->counterMoves;
if (cmh)
cmh->update(pos.piece_on(prevSq), prevSq, bonus);
cmh->update(pc, s, bonus);
if (fmh1)
fmh1->update(pos.piece_on(prevSq), prevSq, bonus);
fmh1->update(pc, s, bonus);
if (fmh2)
fmh2->update(pos.piece_on(prevSq), prevSq, bonus);
fmh2->update(pc, s, bonus);
}
@ -1445,42 +1445,24 @@ moves_loop: // When in check search starts from here
ss->killers[0] = move;
}
CounterMoveStats* cmh = (ss-1)->counterMoves;
CounterMoveStats* fmh1 = (ss-2)->counterMoves;
CounterMoveStats* fmh2 = (ss-4)->counterMoves;
Color c = pos.side_to_move();
Thread* thisThread = pos.this_thread();
thisThread->history.update(pos.moved_piece(move), to_sq(move), bonus);
thisThread->fromTo.update(c, move, bonus);
thisThread->history.update(pos.moved_piece(move), to_sq(move), bonus);
update_cm_stats(ss, pos.moved_piece(move), to_sq(move), bonus);
if (cmh)
if ((ss-1)->counterMoves)
{
Square prevSq = to_sq((ss-1)->currentMove);
thisThread->counterMoves.update(pos.piece_on(prevSq), prevSq, move);
cmh->update(pos.moved_piece(move), to_sq(move), bonus);
}
if (fmh1)
fmh1->update(pos.moved_piece(move), to_sq(move), bonus);
if (fmh2)
fmh2->update(pos.moved_piece(move), to_sq(move), bonus);
// Decrease all the other played quiet moves
for (int i = 0; i < quietsCnt; ++i)
{
thisThread->history.update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
thisThread->fromTo.update(c, quiets[i], -bonus);
if (cmh)
cmh->update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
if (fmh1)
fmh1->update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
if (fmh2)
fmh2->update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
thisThread->history.update(pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
update_cm_stats(ss, pos.moved_piece(quiets[i]), to_sq(quiets[i]), -bonus);
}
}