X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmove.h;h=844ec1f6be609d198be1b656630e55eaf327a387;hb=d9b920acfbc5c8fdc362111d00c962ad654595e6;hp=03df770dc824eee7849b37be806042fe0015c2d7;hpb=e2e249eabd2493e2bb9e5e017aafaac074a706ef;p=stockfish

diff --git a/src/move.h b/src/move.h
index 03df770d..844ec1f6 100644
--- a/src/move.h
+++ b/src/move.h
@@ -62,9 +62,50 @@ struct MoveStack {
   int score;
 };
 
-// Note that operator< is set up such that std::stable_sort() will sort in descending order
+// Note that operator< is set up such that sorting will be in descending order
 inline bool operator<(const MoveStack& f, const MoveStack& s) { return s.score < f.score; }
 
+// Our stable insertion sort in range [firstMove, lastMove), platform independent
+template<typename T>
+inline void sort_moves(T* firstMove, T* lastMove)
+{
+    T value;
+    T *cur, *p, *d;
+
+    if (firstMove != lastMove)
+        for (cur = firstMove; ++cur != lastMove; )
+        {
+            p = d = cur;
+            value = *p--;
+            if (value < *p)
+            {
+                do *d = *p;
+                while (--d != firstMove && value < *--p);
+                *d = value;
+            }
+        }
+}
+
+// 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