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Another push to perft speed

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We don't need to generate captures and non
captures in a separate step. This gives another
7% push to perft speed.

yes, I know, it is totally useless :-)

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-08-06 12:01:21 +01:00
parent 3a2cd37080
commit be540b6dd7
2 changed files with 29 additions and 5 deletions
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33
src/movegen.cpp
View file

@ -140,6 +140,32 @@ MoveStack* generate_noncaptures(const Position& pos, MoveStack* mlist) {
} }
/// generate_non_evasions() generates all pseudo-legal captures and
/// non-captures. Returns a pointer to the end of the move list.
MoveStack* generate_non_evasions(const Position& pos, MoveStack* mlist) {
assert(pos.is_ok());
assert(!pos.is_check());
Color us = pos.side_to_move();
Bitboard target = pos.pieces_of_color(opposite_color(us));
mlist = generate_piece_moves<PAWN, CAPTURE>(pos, mlist, us, target);
mlist = generate_piece_moves<PAWN, NON_CAPTURE>(pos, mlist, us, pos.empty_squares());
target |= pos.empty_squares();
mlist = generate_piece_moves<KNIGHT>(pos, mlist, us, target);
mlist = generate_piece_moves<BISHOP>(pos, mlist, us, target);
mlist = generate_piece_moves<ROOK>(pos, mlist, us, target);
mlist = generate_piece_moves<QUEEN>(pos, mlist, us, target);
mlist = generate_piece_moves<KING>(pos, mlist, us, target);
mlist = generate_castle_moves<KING_SIDE>(pos, mlist);
return generate_castle_moves<QUEEN_SIDE>(pos, mlist);
}
/// generate_non_capture_checks() generates all pseudo-legal non-captures and knight /// generate_non_capture_checks() generates all pseudo-legal non-captures and knight
/// underpromotions that give check. Returns a pointer to the end of the move list. /// underpromotions that give check. Returns a pointer to the end of the move list.
@ -260,11 +286,8 @@ MoveStack* generate_moves(const Position& pos, MoveStack* mlist, bool pseudoLega
Bitboard pinned = pos.pinned_pieces(pos.side_to_move()); Bitboard pinned = pos.pinned_pieces(pos.side_to_move());
// Generate pseudo-legal moves // Generate pseudo-legal moves
if (pos.is_check()) last = pos.is_check() ? generate_evasions(pos, mlist)
last = generate_evasions(pos, mlist); : generate_non_evasions(pos, mlist);
else
last = generate_noncaptures(pos, generate_captures(pos, mlist));
if (pseudoLegal) if (pseudoLegal)
return last; return last;

1
src/movegen.h
View file

@ -36,6 +36,7 @@ extern MoveStack* generate_captures(const Position& pos, MoveStack* mlist);
extern MoveStack* generate_noncaptures(const Position& pos, MoveStack* mlist); extern MoveStack* generate_noncaptures(const Position& pos, MoveStack* mlist);
extern MoveStack* generate_non_capture_checks(const Position& pos, MoveStack* mlist); extern MoveStack* generate_non_capture_checks(const Position& pos, MoveStack* mlist);
extern MoveStack* generate_evasions(const Position& pos, MoveStack* mlist); extern MoveStack* generate_evasions(const Position& pos, MoveStack* mlist);
extern MoveStack* generate_non_evasions(const Position& pos, MoveStack* mlist);
extern MoveStack* generate_moves(const Position& pos, MoveStack* mlist, bool pseudoLegal = false); extern MoveStack* generate_moves(const Position& pos, MoveStack* mlist, bool pseudoLegal = false);
extern bool move_is_legal(const Position& pos, const Move m, Bitboard pinned); extern bool move_is_legal(const Position& pos, const Move m, Bitboard pinned);
extern bool move_is_legal(const Position& pos, const Move m); extern bool move_is_legal(const Position& pos, const Move m);