// Update material hash key and prefetch access to materialTable
k ^= Zobrist::psq[them][captured][capsq];
st->materialKey ^= Zobrist::psq[them][captured][pieceCount[them][captured]];
- prefetch((char*)thisThread->materialTable[st->materialKey]);
+ prefetch(thisThread->materialTable[st->materialKey]);
// Update incremental scores
st->psq -= psq[them][captured][capsq];
// Update pawn hash key and prefetch access to pawnsTable
st->pawnKey ^= Zobrist::psq[us][PAWN][from] ^ Zobrist::psq[us][PAWN][to];
- prefetch((char*)thisThread->pawnsTable[st->pawnKey]);
+ prefetch(thisThread->pawnsTable[st->pawnKey]);
// Reset rule 50 draw counter
st->rule50 = 0;
}
st->key ^= Zobrist::side;
- prefetch((char*)TT.first_entry(st->key));
+ prefetch(TT.first_entry(st->key));
++st->rule50;
st->pliesFromNull = 0;
// Locate and remove the next least valuable attacker
captured = min_attacker<PAWN>(byTypeBB, to, stmAttackers, occupied, attackers);
-
- // Stop before processing a king capture
- if (captured == KING)
- {
- if (stmAttackers == attackers)
- ++slIndex;
-
- break;
- }
-
stm = ~stm;
stmAttackers = attackers & pieces(stm);
++slIndex;
- } while (stmAttackers);
+ } while (stmAttackers && (captured != KING || (--slIndex, false))); // Stop before a king capture
// Having built the swap list, we negamax through it to find the best
// achievable score from the point of view of the side to move.
/// Position::pos_is_ok() performs some consistency checks for the position object.
/// This is meant to be helpful when debugging.
-bool Position::pos_is_ok(int* step) const {
-
- // Which parts of the position should be verified?
- const bool all = false;
-
- const bool testBitboards = all || false;
- const bool testState = all || false;
- const bool testKingCount = all || false;
- const bool testKingCapture = all || false;
- const bool testPieceCounts = all || false;
- const bool testPieceList = all || false;
- const bool testCastlingSquares = all || false;
-
- if (step)
- *step = 1;
+bool Position::pos_is_ok(bool fast, int* failedStep) const {
- if ( (sideToMove != WHITE && sideToMove != BLACK)
- || piece_on(king_square(WHITE)) != W_KING
- || piece_on(king_square(BLACK)) != B_KING
- || ( ep_square() != SQ_NONE
- && relative_rank(sideToMove, ep_square()) != RANK_6))
- return false;
+ enum { Default, King, Bitboards, State, Lists, Castling };
- if (step && ++*step, testBitboards)
+ for (int step = Default; step <= (fast ? Default : Castling); step++)
{
- // The intersection of the white and black pieces must be empty
- if (pieces(WHITE) & pieces(BLACK))
- return false;
-
- // The union of the white and black pieces must be equal to all
- // occupied squares
- if ((pieces(WHITE) | pieces(BLACK)) != pieces())
- return false;
+ if (failedStep)
+ *failedStep = step;
+
+ if (step == Default)
+ if ( (sideToMove != WHITE && sideToMove != BLACK)
+ || piece_on(king_square(WHITE)) != W_KING
+ || piece_on(king_square(BLACK)) != B_KING
+ || ( ep_square() != SQ_NONE
+ && relative_rank(sideToMove, ep_square()) != RANK_6))
+ return false;
- // Separate piece type bitboards must have empty intersections
- for (PieceType p1 = PAWN; p1 <= KING; ++p1)
- for (PieceType p2 = PAWN; p2 <= KING; ++p2)
- if (p1 != p2 && (pieces(p1) & pieces(p2)))
- return false;
- }
+ if (step == King)
+ if ( std::count(board, board + SQUARE_NB, W_KING) != 1
+ || std::count(board, board + SQUARE_NB, B_KING) != 1
+ || attackers_to(king_square(~sideToMove)) & pieces(sideToMove))
+ return false;
- if (step && ++*step, testState)
- {
- StateInfo si;
- set_state(&si);
- if ( st->key != si.key
- || st->pawnKey != si.pawnKey
- || st->materialKey != si.materialKey
- || st->nonPawnMaterial[WHITE] != si.nonPawnMaterial[WHITE]
- || st->nonPawnMaterial[BLACK] != si.nonPawnMaterial[BLACK]
- || st->psq != si.psq
- || st->checkersBB != si.checkersBB)
- return false;
- }
+ if (step == Bitboards)
+ {
+ if ( (pieces(WHITE) & pieces(BLACK))
+ ||(pieces(WHITE) | pieces(BLACK)) != pieces())
+ return false;
- if (step && ++*step, testKingCount)
- if ( std::count(board, board + SQUARE_NB, W_KING) != 1
- || std::count(board, board + SQUARE_NB, B_KING) != 1)
- return false;
+ for (PieceType p1 = PAWN; p1 <= KING; ++p1)
+ for (PieceType p2 = PAWN; p2 <= KING; ++p2)
+ if (p1 != p2 && (pieces(p1) & pieces(p2)))
+ return false;
+ }
- if (step && ++*step, testKingCapture)
- if (attackers_to(king_square(~sideToMove)) & pieces(sideToMove))
- return false;
+ if (step == State)
+ {
+ StateInfo si;
+ set_state(&si);
+ if ( st->key != si.key
+ || st->pawnKey != si.pawnKey
+ || st->materialKey != si.materialKey
+ || st->nonPawnMaterial[WHITE] != si.nonPawnMaterial[WHITE]
+ || st->nonPawnMaterial[BLACK] != si.nonPawnMaterial[BLACK]
+ || st->psq != si.psq
+ || st->checkersBB != si.checkersBB)
+ return false;
+ }
- if (step && ++*step, testPieceCounts)
- for (Color c = WHITE; c <= BLACK; ++c)
- for (PieceType pt = PAWN; pt <= KING; ++pt)
- if (pieceCount[c][pt] != popcount<Full>(pieces(c, pt)))
- return false;
-
- if (step && ++*step, testPieceList)
- for (Color c = WHITE; c <= BLACK; ++c)
- for (PieceType pt = PAWN; pt <= KING; ++pt)
- for (int i = 0; i < pieceCount[c][pt]; ++i)
- if ( board[pieceList[c][pt][i]] != make_piece(c, pt)
- || index[pieceList[c][pt][i]] != i)
+ if (step == Lists)
+ for (Color c = WHITE; c <= BLACK; ++c)
+ for (PieceType pt = PAWN; pt <= KING; ++pt)
+ {
+ if (pieceCount[c][pt] != popcount<Full>(pieces(c, pt)))
return false;
- if (step && ++*step, testCastlingSquares)
- for (Color c = WHITE; c <= BLACK; ++c)
- for (CastlingSide s = KING_SIDE; s <= QUEEN_SIDE; s = CastlingSide(s + 1))
- {
- if (!can_castle(c | s))
- continue;
-
- if ( (castlingRightsMask[king_square(c)] & (c | s)) != (c | s)
- || piece_on(castlingRookSquare[c | s]) != make_piece(c, ROOK)
- || castlingRightsMask[castlingRookSquare[c | s]] != (c | s))
- return false;
- }
+ for (int i = 0; i < pieceCount[c][pt]; ++i)
+ if ( board[pieceList[c][pt][i]] != make_piece(c, pt)
+ || index[pieceList[c][pt][i]] != i)
+ return false;
+ }
+
+ if (step == Castling)
+ for (Color c = WHITE; c <= BLACK; ++c)
+ for (CastlingSide s = KING_SIDE; s <= QUEEN_SIDE; s = CastlingSide(s + 1))
+ {
+ if (!can_castle(c | s))
+ continue;
+
+ if ( piece_on(castlingRookSquare[c | s]) != make_piece(c, ROOK)
+ || castlingRightsMask[castlingRookSquare[c | s]] != (c | s)
+ ||(castlingRightsMask[king_square(c)] & (c | s)) != (c | s))
+ return false;
+ }
+ }
return true;
}
projects / stockfish / blobdiff