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Movegen: further simplify generate_move_if_legal

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Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2008-10-17 22:52:36 +02:00
parent 8be2c483a1
commit c852a94009
1 changed files with 8 additions and 40 deletions
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48
src/movegen.cpp
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@ -712,9 +712,8 @@ Move generate_move_if_legal(const Position &pos, Move m, Bitboard pinned) {
return MOVE_NONE;
// Proceed according to the type of the moving piece.
switch (type_of_piece(pc))
{
case PAWN:
if (type_of_piece(pc) == PAWN)
{
// If the destination square is on the 8/1th rank, the move must
// be a promotion.
if ( ( (square_rank(to) == RANK_8 && us == WHITE)
@ -768,43 +767,12 @@ Move generate_move_if_legal(const Position &pos, Move m, Bitboard pinned) {
}
// The move is pseudo-legal. Return it if it is legal.
return (pos.move_is_legal(m) ? m : MOVE_NONE);
break;
}
case KNIGHT:
return ( pos.knight_attacks_square(from, to)
&& pos.move_is_legal(m)
&& !move_promotion(m) ? m : MOVE_NONE);
break;
case BISHOP:
return ( pos.bishop_attacks_square(from, to)
&& pos.move_is_legal(m)
&& !move_promotion(m) ? m : MOVE_NONE);
break;
case ROOK:
return ( pos.rook_attacks_square(from, to)
&& pos.move_is_legal(m)
&& !move_promotion(m) ? m : MOVE_NONE);
break;
case QUEEN:
return ( pos.queen_attacks_square(from, to)
&& pos.move_is_legal(m)
&& !move_promotion(m) ? m : MOVE_NONE);
break;
case KING:
return ( pos.king_attacks_square(from, to)
&& pos.move_is_legal(m)
&& !move_promotion(m) ? m : MOVE_NONE);
break;
default:
assert(false);
}
assert(false);
return MOVE_NONE;
// Luckly we can handle all the other pieces in one go
return ( pos.piece_attacks_square(from, to)
&& pos.move_is_legal(m)
&& !move_promotion(m) ? m : MOVE_NONE);
}
@ -1039,7 +1007,7 @@ namespace {
return n;
}
int generate_knight_moves(const Position &pos, MoveStack *mlist,
Color side, Bitboard target) {
Square from, to;