Base work for exclusion search

[stockfish] / src / move.h

diff --git a/src/move.h b/src/move.h
index 2ba0884087422d7bdd908d1130d3b19ed3a02486..d70bb81e77b1e4417633994175c896b94e243f11 100644 (file)
--- a/src/move.h
+++ b/src/move.h
@@ -73,7 +73,7 @@ inline void sort_moves(T* firstMove, T* lastMove)
     T *cur, *p, *d;
 
     if (firstMove != lastMove)
-        for (cur = firstMove; ++cur != lastMove; )
+        for (cur = firstMove + 1; cur != lastMove; cur++)
         {
             p = d = cur;
             value = *p--;
@@ -86,6 +86,27 @@ inline void sort_moves(T* firstMove, T* lastMove)
         }
 }
 
+// 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<typename T>
+inline T pick_best(T* curMove, T* lastMove)
+{
+    T bestMove, tmp;
+
+    bestMove = *curMove;
+    while (++curMove != lastMove)
+    {
+        if (*curMove < bestMove)
+        {
+            tmp = *curMove;
+            *curMove = bestMove;
+            bestMove = tmp;
+        }
+    }
+    return bestMove;
+}
+
 ////
 //// Inline functions
 ////
@@ -102,6 +123,10 @@ inline PieceType move_promotion_piece(Move m) {
   return PieceType((int(m) >> 12) & 7);
 }
 
+inline int move_is_special(Move m) {
+  return m & (0x1F << 12);
+}
+
 inline int move_is_promotion(Move m) {
   return m & (7 << 12);
 }