#include <cassert>
#include <cstring>
-#include <fstream>
#include <iostream>
#include <sstream>
#include <algorithm>
return (attacks_from<PAWN>(s, BLACK) & pieces(PAWN, WHITE))
| (attacks_from<PAWN>(s, WHITE) & pieces(PAWN, BLACK))
| (attacks_from<KNIGHT>(s) & pieces(KNIGHT))
- | (rook_attacks_bb(s, occ) & pieces(ROOK, QUEEN))
- | (bishop_attacks_bb(s, occ) & pieces(BISHOP, QUEEN))
+ | (attacks_bb<ROOK>(s, occ) & pieces(ROOK, QUEEN))
+ | (attacks_bb<BISHOP>(s, occ) & pieces(BISHOP, QUEEN))
| (attacks_from<KING>(s) & pieces(KING));
}
switch (type_of(p))
{
- case BISHOP: return bishop_attacks_bb(s, occ);
- case ROOK : return rook_attacks_bb(s, occ);
- case QUEEN : return bishop_attacks_bb(s, occ) | rook_attacks_bb(s, occ);
+ case BISHOP: return attacks_bb<BISHOP>(s, occ);
+ case ROOK : return attacks_bb<ROOK>(s, occ);
+ case QUEEN : return attacks_bb<BISHOP>(s, occ) | attacks_bb<ROOK>(s, occ);
default : return StepAttacksBB[p][s];
}
}
// Update occupancy as if the piece is moving
occ = occupied_squares();
- do_move_bb(&occ, make_move_bb(from, to));
+ occ ^= from;
+ occ ^= to;
// The piece moved in 'to' attacks the square 's' ?
- if (bit_is_set(attacks_from(piece, to, occ), s))
+ if (attacks_from(piece, to, occ) & s)
return true;
// Scan for possible X-ray attackers behind the moved piece
- xray = (rook_attacks_bb(s, occ) & pieces(ROOK, QUEEN, color_of(piece)))
- |(bishop_attacks_bb(s, occ) & pieces(BISHOP, QUEEN, color_of(piece)));
+ xray = (attacks_bb<ROOK>(s, occ) & pieces(ROOK, QUEEN, color_of(piece)))
+ |(attacks_bb<BISHOP>(s, occ) & pieces(BISHOP, QUEEN, color_of(piece)));
// Verify attackers are triggered by our move and not already existing
return xray && (xray ^ (xray & attacks_from<QUEEN>(s)));
assert(piece_on(capsq) == make_piece(them, PAWN));
assert(piece_on(to) == NO_PIECE);
- clear_bit(&b, from);
- clear_bit(&b, capsq);
- set_bit(&b, to);
+ b ^= from;
+ b ^= capsq;
+ b |= to;
- return !(rook_attacks_bb(ksq, b) & pieces(ROOK, QUEEN, them))
- && !(bishop_attacks_bb(ksq, b) & pieces(BISHOP, QUEEN, them));
+ return !(attacks_bb<ROOK>(ksq, b) & pieces(ROOK, QUEEN, them))
+ && !(attacks_bb<BISHOP>(ksq, b) & pieces(BISHOP, QUEEN, them));
}
// If the moving piece is a king, check whether the destination
// A non-king move is legal if and only if it is not pinned or it
// is moving along the ray towards or away from the king.
return !pinned
- || !bit_is_set(pinned, from)
+ || !(pinned & from)
|| squares_aligned(from, to_sq(m), king_square(us));
}
return false;
}
}
- else if (!bit_is_set(attacks_from(pc, from), to))
+ else if (!(attacks_from(pc, from) & to))
return false;
// Evasions generator already takes care to avoid some kind of illegal moves
if (type_of(piece_on(from)) == KING)
{
Bitboard b = occupied_squares();
- clear_bit(&b, from);
+ b ^= from;
if (attackers_to(to_sq(m), b) & pieces(~us))
return false;
}
// Our move must be a blocking evasion or a capture of the checking piece
target = squares_between(checksq, king_square(us)) | checkers();
- if (!bit_is_set(target, to_sq(m)))
+ if (!(target & to_sq(m)))
return false;
}
}
PieceType pt = type_of(piece_on(from));
// Direct check ?
- if (bit_is_set(ci.checkSq[pt], to))
+ if (ci.checkSq[pt] & to)
return true;
// Discovery check ?
- if (ci.dcCandidates && bit_is_set(ci.dcCandidates, from))
+ if (ci.dcCandidates && (ci.dcCandidates & from))
{
// For pawn and king moves we need to verify also direction
if ( (pt != PAWN && pt != KING)
// Promotion with check ?
if (is_promotion(m))
{
- clear_bit(&b, from);
- return bit_is_set(attacks_from(Piece(promotion_piece_type(m)), to, b), ksq);
+ b ^= from;
+ return attacks_from(Piece(promotion_piece_type(m)), to, b) & ksq;
}
// En passant capture with check ? We have already handled the case
if (is_enpassant(m))
{
Square capsq = make_square(file_of(to), rank_of(from));
- clear_bit(&b, from);
- clear_bit(&b, capsq);
- set_bit(&b, to);
- return (rook_attacks_bb(ksq, b) & pieces(ROOK, QUEEN, us))
- ||(bishop_attacks_bb(ksq, b) & pieces(BISHOP, QUEEN, us));
+ b ^= from;
+ b ^= capsq;
+ b |= to;
+ return (attacks_bb<ROOK>(ksq, b) & pieces(ROOK, QUEEN, us))
+ ||(attacks_bb<BISHOP>(ksq, b) & pieces(BISHOP, QUEEN, us));
}
// Castling with check ?
kto = relative_square(us, SQ_C1);
rto = relative_square(us, SQ_D1);
}
- clear_bit(&b, kfrom);
- clear_bit(&b, rfrom);
- set_bit(&b, rto);
- set_bit(&b, kto);
- return bit_is_set(rook_attacks_bb(rto, b), ksq);
+ b ^= kfrom;
+ b ^= rfrom;
+ b |= rto;
+ b |= kto;
+ return attacks_bb<ROOK>(rto, b) & ksq;
}
return false;
k ^= zobSideToMove;
// Increment the 50 moves rule draw counter. Resetting it to zero in the
- // case of non-reversible moves is taken care of later.
+ // case of a capture or a pawn move is taken care of later.
st->rule50++;
st->pliesFromNull++;
st->npMaterial[them] -= PieceValueMidgame[capture];
// Remove the captured piece
- clear_bit(&byColorBB[them], capsq);
- clear_bit(&byTypeBB[capture], capsq);
- clear_bit(&occupied, capsq);
+ byColorBB[them] ^= capsq;
+ byTypeBB[capture] ^= capsq;
+ occupied ^= capsq;
// Update piece list, move the last piece at index[capsq] position and
// shrink the list.
prefetch((char*)TT.first_entry(k));
// Move the piece
- Bitboard move_bb = make_move_bb(from, to);
- do_move_bb(&byColorBB[us], move_bb);
- do_move_bb(&byTypeBB[pt], move_bb);
- do_move_bb(&occupied, move_bb);
+ Bitboard from_to_bb = SquareBB[from] | SquareBB[to];
+ byColorBB[us] ^= from_to_bb;
+ byTypeBB[pt] ^= from_to_bb;
+ occupied ^= from_to_bb;
board[to] = board[from];
board[from] = NO_PIECE;
assert(promotion >= KNIGHT && promotion <= QUEEN);
// Replace the pawn with the promoted piece
- clear_bit(&byTypeBB[PAWN], to);
- set_bit(&byTypeBB[promotion], to);
+ byTypeBB[PAWN] ^= to;
+ byTypeBB[promotion] |= to;
board[to] = make_piece(us, promotion);
// Update piece lists, move the last pawn at index[to] position
else
{
// Direct checks
- if (bit_is_set(ci.checkSq[pt], to))
- st->checkersBB = SetMaskBB[to];
+ if (ci.checkSq[pt] & to)
+ st->checkersBB |= to;
// Discovery checks
- if (ci.dcCandidates && bit_is_set(ci.dcCandidates, from))
+ if (ci.dcCandidates && (ci.dcCandidates & from))
{
if (pt != ROOK)
st->checkersBB |= attacks_from<ROOK>(king_square(them)) & pieces(ROOK, QUEEN, us);
assert(promotion >= KNIGHT && promotion <= QUEEN);
// Replace the promoted piece with the pawn
- clear_bit(&byTypeBB[promotion], to);
- set_bit(&byTypeBB[PAWN], to);
+ byTypeBB[promotion] ^= to;
+ byTypeBB[PAWN] |= to;
board[to] = make_piece(us, PAWN);
// Update piece lists, move the last promoted piece at index[to] position
}
// Put the piece back at the source square
- Bitboard move_bb = make_move_bb(to, from);
- do_move_bb(&byColorBB[us], move_bb);
- do_move_bb(&byTypeBB[pt], move_bb);
- do_move_bb(&occupied, move_bb);
+ Bitboard from_to_bb = SquareBB[from] | SquareBB[to];
+ byColorBB[us] ^= from_to_bb;
+ byTypeBB[pt] ^= from_to_bb;
+ occupied ^= from_to_bb;
board[from] = board[to];
board[to] = NO_PIECE;
}
// Restore the captured piece
- set_bit(&byColorBB[them], capsq);
- set_bit(&byTypeBB[capture], capsq);
- set_bit(&occupied, capsq);
+ byColorBB[them] |= capsq;
+ byTypeBB[capture] |= capsq;
+ occupied |= capsq;
board[capsq] = make_piece(them, capture);
assert(piece_on(rfrom) == make_piece(us, ROOK));
// Remove pieces from source squares
- clear_bit(&byColorBB[us], kfrom);
- clear_bit(&byTypeBB[KING], kfrom);
- clear_bit(&occupied, kfrom);
- clear_bit(&byColorBB[us], rfrom);
- clear_bit(&byTypeBB[ROOK], rfrom);
- clear_bit(&occupied, rfrom);
+ byColorBB[us] ^= kfrom;
+ byTypeBB[KING] ^= kfrom;
+ occupied ^= kfrom;
+ byColorBB[us] ^= rfrom;
+ byTypeBB[ROOK] ^= rfrom;
+ occupied ^= rfrom;
// Put pieces on destination squares
- set_bit(&byColorBB[us], kto);
- set_bit(&byTypeBB[KING], kto);
- set_bit(&occupied, kto);
- set_bit(&byColorBB[us], rto);
- set_bit(&byTypeBB[ROOK], rto);
- set_bit(&occupied, rto);
+ byColorBB[us] |= kto;
+ byTypeBB[KING] |= kto;
+ occupied |= kto;
+ byColorBB[us] |= rto;
+ byTypeBB[ROOK] |= rto;
+ occupied |= rto;
// Update board
Piece king = make_piece(us, KING);
st->castleRights &= castleRightsMask[kfrom];
st->key ^= zobCastle[st->castleRights];
- // Reset rule 50 counter
- st->rule50 = 0;
-
// Update checkers BB
st->checkersBB = attackers_to(king_square(~us)) & pieces(us);
assert(type_of(piece_on(capQq)) == PAWN);
// Remove the captured pawn
- clear_bit(&occ, capQq);
+ occ ^= capQq;
capturedType = PAWN;
}
// Find all attackers to the destination square, with the moving piece
// removed, but possibly an X-ray attacker added behind it.
- clear_bit(&occ, from);
+ occ ^= from;
attackers = attackers_to(to, occ);
// If the opponent has no attackers we are finished
// and scan for new X-ray attacks behind the attacker.
b = stmAttackers & pieces(pt);
occ ^= (b & (~b + 1));
- attackers |= (rook_attacks_bb(to, occ) & pieces(ROOK, QUEEN))
- | (bishop_attacks_bb(to, occ) & pieces(BISHOP, QUEEN));
+ attackers |= (attacks_bb<ROOK>(to, occ) & pieces(ROOK, QUEEN))
+ | (attacks_bb<BISHOP>(to, occ) & pieces(BISHOP, QUEEN));
attackers &= occ; // Cut out pieces we've already done
index[s] = pieceCount[c][pt]++;
pieceList[c][pt][index[s]] = s;
- set_bit(&byTypeBB[pt], s);
- set_bit(&byColorBB[c], s);
- set_bit(&occupied, s);
+ byTypeBB[pt] |= s;
+ byColorBB[c] |= s;
+ occupied |= s;
}
projects / stockfish / blobdiff