Introduce enum VALUE_ZERO instead of Value(0)

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 8c941794bc4f9fbf436e363061acb64e4c630043..59025fba1215d78525890a6e56b44251281bbf0a 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -996,7 +996,7 @@ namespace {
 
     // Step 2. Check for aborted search and immediate draw
     if (AbortSearch || ThreadsMgr.thread_should_stop(threadID))
-        return Value(0);
+        return VALUE_ZERO;
 
     if (pos.is_draw() || ply >= PLY_MAX - 1)
         return VALUE_DRAW;
@@ -1493,7 +1493,7 @@ namespace {
       {
           futilityValue =  futilityBase
                          + pos.endgame_value_of_piece_on(move_to(move))
-                         + (move_is_ep(move) ? PawnValueEndgame : Value(0));
+                         + (move_is_ep(move) ? PawnValueEndgame : VALUE_ZERO);
 
           if (futilityValue < alpha)
           {
@@ -1546,7 +1546,7 @@ namespace {
         return value_mated_in(ply);
 
     // Update transposition table
-    Depth d = (depth == DEPTH_ZERO ? DEPTH_ZERO : Depth(-1));
+    Depth d = (depth == DEPTH_ZERO ? DEPTH_ZERO : DEPTH_ZERO - ONE_PLY);
     ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT);
     TT.store(pos.get_key(), value_to_tt(bestValue, ply), vt, d, ss->bestMove, ss->eval, ei.kingDanger[pos.side_to_move()]);
 
@@ -1884,7 +1884,7 @@ namespace {
     if (   captureOrPromotion
         && pos.type_of_piece_on(move_to(m)) != PAWN
         && (  pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK)
-            - pos.midgame_value_of_piece_on(move_to(m)) == Value(0))
+            - pos.midgame_value_of_piece_on(move_to(m)) == VALUE_ZERO)
         && !move_is_promotion(m)
         && !move_is_ep(m))
     {