X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmove.h;h=928bb9e475903f923ba81cf560049f1028e6f7cf;hb=95212222c7444538b84326208e433ac12f15e9fb;hp=56659cd983a0fdc93a7b9d40c16e1c1f2c602534;hpb=539051b1e0fb099c0d0da69d20d6a4c2b98a2cb6;p=stockfish
diff --git a/src/move.h b/src/move.h
index 56659cd9..928bb9e4 100644
--- a/src/move.h
+++ b/src/move.h
@@ -1,7 +1,7 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008 Marco Costalba
+ Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -17,31 +17,34 @@
along with this program. If not, see .
*/
-
#if !defined(MOVE_H_INCLUDED)
#define MOVE_H_INCLUDED
-////
-//// Includes
-////
-
-#include
+#include
#include "misc.h"
#include "piece.h"
#include "square.h"
-
-
-////
-//// Types
-////
-
-class Position;
+#include "value.h"
+
+// Maximum number of allowed moves per position
+const int MOVES_MAX = 256;
+
+/// A move needs 16 bits to be stored
+///
+/// bit 0- 5: destination square (from 0 to 63)
+/// bit 6-11: origin square (from 0 to 63)
+/// bit 12-13: promotion piece type - 2 (from KNIGHT-2 to QUEEN-2)
+/// bit 14-15: special move flag: promotion (1), en passant (2), castle (3)
+///
+/// Special cases are MOVE_NONE and MOVE_NULL. We can sneak these in
+/// because in any normal move destination square is always different
+/// from origin square while MOVE_NONE and MOVE_NULL have the same
+/// origin and destination square, 0 and 1 respectively.
enum Move {
MOVE_NONE = 0,
- MOVE_NULL = 65,
- MOVE_MAX = 0xFFFFFF
+ MOVE_NULL = 65
};
@@ -50,29 +53,106 @@ struct MoveStack {
int score;
};
+inline bool operator<(const MoveStack& f, const MoveStack& s) { return f.score < s.score; }
+
+// An helper insertion sort implementation, works with pointers and iterators
+template
+inline void insertion_sort(K firstMove, K lastMove)
+{
+ T value;
+ K cur, p, d;
+
+ if (firstMove != lastMove)
+ for (cur = firstMove + 1; cur != lastMove; cur++)
+ {
+ p = d = cur;
+ value = *p--;
+ if (*p < value)
+ {
+ do *d = *p;
+ while (--d != firstMove && *--p < value);
+ *d = value;
+ }
+ }
+}
+
+// Our dedicated sort in range [firstMove, lastMove), first splits
+// positive scores from ramining then order seaprately the two sets.
+template
+inline void sort_moves(T* firstMove, T* lastMove, T** lastPositive)
+{
+ T tmp;
+ T *p, *d;
+
+ d = lastMove;
+ p = firstMove - 1;
+
+ d->score = -1; // right guard
+
+ // Split positives vs non-positives
+ do {
+ while ((++p)->score > 0) {}
+
+ if (p != d)
+ {
+ while (--d != p && d->score <= 0) {}
+
+ tmp = *p;
+ *p = *d;
+ *d = tmp;
+ }
+
+ } while (p != d);
+
+ // Sort just positive scored moves, remaining only when we get there
+ insertion_sort(firstMove, p);
+ *lastPositive = p;
+}
+
+// Picks up the best move in range [curMove, lastMove), one per cycle.
+// It is faster then sorting all the moves in advance when moves are few,
+// as normally are the possible captures. Note that is not a stable alghoritm.
+template
+inline T pick_best(T* curMove, T* lastMove)
+{
+ T bestMove, tmp;
+
+ bestMove = *curMove;
+ while (++curMove != lastMove)
+ {
+ if (bestMove < *curMove)
+ {
+ tmp = *curMove;
+ *curMove = bestMove;
+ bestMove = tmp;
+ }
+ }
+ return bestMove;
+}
-////
-//// Inline functions
-////
inline Square move_from(Move m) {
- return Square((int(m) >> 6) & 077);
+ return Square((int(m) >> 6) & 0x3F);
}
inline Square move_to(Move m) {
- return Square(m & 077);
+ return Square(m & 0x3F);
}
-inline PieceType move_promotion(Move m) {
- return PieceType((int(m) >> 12) & 7);
+inline bool move_is_special(Move m) {
+ return m & (3 << 14);
}
-inline bool move_is_ep(Move m) {
- return bool((int(m) >> 15) & 1);
+inline bool move_is_promotion(Move m) {
+ return (m & (3 << 14)) == (1 << 14);
}
-inline bool move_is_castle(Move m) {
- return bool((int(m) >> 16) & 1);
+inline int move_is_ep(Move m) {
+ return (m & (3 << 14)) == (2 << 14);
+}
+
+inline int move_is_castle(Move m) {
+ return (m & (3 << 14)) == (3 << 14);
}
inline bool move_is_short_castle(Move m) {
@@ -83,31 +163,35 @@ inline bool move_is_long_castle(Move m) {
return move_is_castle(m) && (move_to(m) < move_from(m));
}
-inline Move make_promotion_move(Square from, Square to, PieceType promotion) {
- return Move(int(to) | (int(from) << 6) | (int(promotion) << 12));
+inline PieceType move_promotion_piece(Move m) {
+ return move_is_promotion(m) ? PieceType(((int(m) >> 12) & 3) + 2) : PIECE_TYPE_NONE;
}
inline Move make_move(Square from, Square to) {
return Move(int(to) | (int(from) << 6));
}
-inline Move make_castle_move(Square from, Square to) {
- return Move(int(to) | (int(from) << 6) | (1 << 16));
+inline Move make_promotion_move(Square from, Square to, PieceType promotion) {
+ return Move(int(to) | (int(from) << 6) | ((int(promotion) - 2) << 12) | (1 << 14));
}
inline Move make_ep_move(Square from, Square to) {
- return Move(int(to) | (int(from) << 6) | (1 << 15));
+ return Move(int(to) | (int(from) << 6) | (2 << 14));
}
+inline Move make_castle_move(Square from, Square to) {
+ return Move(int(to) | (int(from) << 6) | (3 << 14));
+}
-////
-//// Prototypes
-////
+inline bool move_is_ok(Move m) {
+ return move_from(m) != move_to(m); // Catches also MOVE_NONE
+}
-extern std::ostream &operator << (std::ostream &os, Move m);
-extern Move move_from_string(const Position &pos, const std::string &str);
-extern const std::string move_to_string(Move m);
-extern bool move_is_ok(Move m);
+class Position;
+extern const std::string move_to_uci(Move m, bool chess960);
+extern Move move_from_uci(const Position& pos, const std::string& str);
+extern const std::string move_to_san(Position& pos, Move m);
+extern const std::string pretty_pv(Position& pos, int depth, Value score, int time, Move pv[]);
#endif // !defined(MOVE_H_INCLUDED)