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Code Issues Releases Wiki Activity

Convert Position to use Score struct

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No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-11-07 12:40:48 +01:00
parent 06f06a9be8
commit 1ae8c59c0b
4 changed files with 25 additions and 47 deletions
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5
src/evaluate.cpp
View file

@ -352,7 +352,7 @@ Value do_evaluate(const Position& pos, EvalInfo& ei, int threadID) {
// Initialize by reading the incrementally updated scores included in the
// position object (material + piece square tables)
ei.value = Score(pos.mg_value(), pos.eg_value());
ei.value = pos.value();
// Probe the material hash table
ei.mi = MaterialTable[threadID]->get_material_info(pos);
@ -489,11 +489,10 @@ Value quick_evaluate(const Position &pos) {
static const
ScaleFactor sf[2] = {SCALE_FACTOR_NORMAL, SCALE_FACTOR_NORMAL};
Score v = Score(pos.mg_value(), pos.eg_value());
Phase ph = pos.game_phase();
Color stm = pos.side_to_move();
return Sign[stm] * scale_by_game_phase(v, ph, sf);
return Sign[stm] * scale_by_game_phase(pos.value(), ph, sf);
}

50
src/position.cpp
View file

@ -213,8 +213,7 @@ void Position::from_fen(const string& fen) {
st->key = compute_key();
st->pawnKey = compute_pawn_key();
st->materialKey = compute_material_key();
st->mgValue = compute_value<MidGame>();
st->egValue = compute_value<EndGame>();
st->value = Score(compute_value<MidGame>(), compute_value<EndGame>());
st->npMaterial[WHITE] = compute_non_pawn_material(WHITE);
st->npMaterial[BLACK] = compute_non_pawn_material(BLACK);
}
@ -830,8 +829,7 @@ void Position::do_move(Move m, StateInfo& newSt, Bitboard dcCandidates) {
}
// Update incremental scores
st->mgValue += pst_delta<MidGame>(piece, from, to);
st->egValue += pst_delta<EndGame>(piece, from, to);
st->value += Score(pst_delta<MidGame>(piece, from, to), pst_delta<EndGame>(piece, from, to));
if (pm) // promotion ?
{
@ -866,10 +864,8 @@ void Position::do_move(Move m, StateInfo& newSt, Bitboard dcCandidates) {
st->pawnKey ^= zobrist[us][PAWN][to];
// Partially revert and update incremental scores
st->mgValue -= pst<MidGame>(us, PAWN, to);
st->mgValue += pst<MidGame>(us, promotion, to);
st->egValue -= pst<EndGame>(us, PAWN, to);
st->egValue += pst<EndGame>(us, promotion, to);
st->value -= Score(pst<MidGame>(us, PAWN, to), pst<EndGame>(us, PAWN, to));
st->value += Score(pst<MidGame>(us, promotion, to), pst<EndGame>(us, promotion, to));
// Update material
st->npMaterial[us] += piece_value_midgame(promotion);
@ -899,9 +895,7 @@ void Position::do_move(Move m, StateInfo& newSt, Bitboard dcCandidates) {
// Finish
sideToMove = opposite_color(sideToMove);
st->mgValue += (sideToMove == WHITE)? TempoValueMidgame : -TempoValueMidgame;
st->egValue += (sideToMove == WHITE)? TempoValueEndgame : -TempoValueEndgame;
st->value += (sideToMove == WHITE) ? TempoValue : -TempoValue;
assert(is_ok());
}
@ -937,8 +931,7 @@ void Position::do_capture_move(Bitboard& key, PieceType capture, Color them, Squ
key ^= zobrist[them][capture][capsq];
// Update incremental scores
st->mgValue -= pst<MidGame>(them, capture, capsq);
st->egValue -= pst<EndGame>(them, capture, capsq);
st->value -= Score(pst<MidGame>(them, capture, capsq), pst<EndGame>(them, capture, capsq));
// If the captured piece was a pawn, update pawn hash key,
// otherwise update non-pawn material.
@ -1035,10 +1028,8 @@ void Position::do_castle_move(Move m) {
index[rto] = tmp;
// Update incremental scores
st->mgValue += pst_delta<MidGame>(king, kfrom, kto);
st->egValue += pst_delta<EndGame>(king, kfrom, kto);
st->mgValue += pst_delta<MidGame>(rook, rfrom, rto);
st->egValue += pst_delta<EndGame>(rook, rfrom, rto);
st->value += Score(pst_delta<MidGame>(king, kfrom, kto), pst_delta<EndGame>(king, kfrom, kto));
st->value += Score(pst_delta<MidGame>(rook, rfrom, rto), pst_delta<EndGame>(rook, rfrom, rto));
// Update hash key
st->key ^= zobrist[us][KING][kfrom] ^ zobrist[us][KING][kto];
@ -1064,9 +1055,7 @@ void Position::do_castle_move(Move m) {
// Finish
sideToMove = opposite_color(sideToMove);
st->mgValue += (sideToMove == WHITE)? TempoValueMidgame : -TempoValueMidgame;
st->egValue += (sideToMove == WHITE)? TempoValueEndgame : -TempoValueEndgame;
st->value += (sideToMove == WHITE) ? TempoValue : -TempoValue;
assert(is_ok());
}
@ -1258,8 +1247,7 @@ void Position::do_null_move(StateInfo& backupSt) {
// a backup storage not as a new state to be used.
backupSt.key = st->key;
backupSt.epSquare = st->epSquare;
backupSt.mgValue = st->mgValue;
backupSt.egValue = st->egValue;
backupSt.value = st->value;
backupSt.previous = st->previous;
backupSt.pliesFromNull = st->pliesFromNull;
st->previous = &backupSt;
@ -1279,10 +1267,8 @@ void Position::do_null_move(StateInfo& backupSt) {
st->epSquare = SQ_NONE;
st->rule50++;
st->pliesFromNull = 0;
st->value += (sideToMove == WHITE) ? TempoValue : -TempoValue;
gamePly++;
st->mgValue += (sideToMove == WHITE)? TempoValueMidgame : -TempoValueMidgame;
st->egValue += (sideToMove == WHITE)? TempoValueEndgame : -TempoValueEndgame;
}
@ -1297,8 +1283,7 @@ void Position::undo_null_move() {
StateInfo* backupSt = st->previous;
st->key = backupSt->key;
st->epSquare = backupSt->epSquare;
st->mgValue = backupSt->mgValue;
st->egValue = backupSt->egValue;
st->value = backupSt->value;
st->previous = backupSt->previous;
st->pliesFromNull = backupSt->pliesFromNull;
@ -1664,8 +1649,8 @@ Value Position::compute_value() const {
}
}
const Value TempoValue = (Phase == MidGame ? TempoValueMidgame : TempoValueEndgame);
result += (side_to_move() == WHITE)? TempoValue / 2 : -TempoValue / 2;
const Value tv = (Phase == MidGame ? TempoValue.mg() : TempoValue.eg());
result += (side_to_move() == WHITE)? tv / 2 : -tv / 2;
return result;
}
@ -1878,8 +1863,7 @@ void Position::flipped_copy(const Position& pos) {
st->materialKey = compute_material_key();
// Incremental scores
st->mgValue = compute_value<MidGame>();
st->egValue = compute_value<EndGame>();
st->value = Score(compute_value<MidGame>(), compute_value<EndGame>());
// Material
st->npMaterial[WHITE] = compute_non_pawn_material(WHITE);
@ -2008,10 +1992,10 @@ bool Position::is_ok(int* failedStep) const {
if (failedStep) (*failedStep)++;
if (debugIncrementalEval)
{
if (st->mgValue != compute_value<MidGame>())
if (st->value.mg() != compute_value<MidGame>())
return false;
if (st->egValue != compute_value<EndGame>())
if (st->value.eg() != compute_value<EndGame>())
return false;
}

13
src/position.h
View file

@ -90,7 +90,7 @@ struct StateInfo {
Key key, pawnKey, materialKey;
int castleRights, rule50, pliesFromNull;
Square epSquare;
Value mgValue, egValue;
Score value;
Value npMaterial[2];
PieceType capture;
@ -240,8 +240,7 @@ public:
Key get_material_key() const;
// Incremental evaluation
Value mg_value() const;
Value eg_value() const;
Score value() const;
Value non_pawn_material(Color c) const;
Phase game_phase() const;
template<GamePhase> Value pst_delta(Piece piece, Square from, Square to) const;
@ -514,12 +513,8 @@ inline Value Position::pst_delta(Piece piece, Square from, Square to) const {
: EgPieceSquareTable[piece][to] - EgPieceSquareTable[piece][from]);
}
inline Value Position::mg_value() const {
return st->mgValue;
}
inline Value Position::eg_value() const {
return st->egValue;
inline Score Position::value() const {
return st->value;
}
inline Value Position::non_pawn_material(Color c) const {

4
src/uci.cpp
View file

@ -148,8 +148,8 @@ namespace {
else if (token == "eval")
{
EvalInfo ei;
cout << "Incremental mg: " << RootPosition.mg_value()
<< "\nIncremental eg: " << RootPosition.eg_value()
cout << "Incremental mg: " << RootPosition.value().mg()
<< "\nIncremental eg: " << RootPosition.value().eg()
<< "\nFull eval: " << evaluate(RootPosition, ei, 0) << endl;
}
else if (token == "key")