hash: 哈希表大小由64M调小为32M

* g++ 编译后运行不再提示 std::bad_alloc
* 运行速度反而提升 5%

Author: calcitem

NineChess/src/ninechessai_ab.cpp

@@ -34,7 +34,7 @@
 using namespace CTSL;
 
 #ifdef HASH_MAP_ENABLE
-static constexpr int hashsize = 0x4000000; // 8-128M:102s, 4-64M:93s 2-32M:91s 1-16M: 冲突
+static constexpr int hashsize = 0x2000000; // 8-128M:102s, 4-64M:93s 2-32M:91s 1-16M: 冲突
 HashMap<uint64_t, NineChessAi_ab::HashValue> hashmap(hashsize);
 #endif // HASH_MAP_ENABLE
 
@@ -1026,20 +1026,20 @@ int NineChessAi_ab::probeHash(uint64_t hash, int depth, int alpha, int beta, int
 
     type = hashValue.type;
 
-    if (hashValue.type == hashfEXACT) {
-        return hashValue.value;
-    }
-    if ((hashValue.type == hashfALPHA) && // 最多是 hashValue.value
-        (hashValue.value <= alpha)) {
-        return alpha;
-    }
-    if ((hashValue.type == hashfBETA) && // 至少是 hashValue.value
-        (hashValue.value >= beta)) {
-        return beta;
+    if (hashValue.type == hashfEXACT) {
+        return hashValue.value;
+    }
+    if ((hashValue.type == hashfALPHA) && // 最多是 hashValue.value
+        (hashValue.value <= alpha)) {
+        return alpha;
+    }
+    if ((hashValue.type == hashfBETA) && // 至少是 hashValue.value
+        (hashValue.value >= beta)) {
+        return beta;
     }
 
-out:
-    bestMove = hashValue.bestMove;
+out:
+    bestMove = hashValue.bestMove;
     return valUNKNOWN;
 }
 
@@ -1081,13 +1081,13 @@ int NineChessAi_ab::recordHash(int value, int depth, HashType type, uint64_t has
     HashValue hashValue;
     memset(&hashValue, 0, sizeof(HashValue));
 
-    if (findHash(hash, hashValue) &&
-        hashValue.type != hashfEMPTY &&
-        hashValue.depth > depth) {
-#ifdef DEBUG_MODE
-        qDebug() << "Skip recordHash coz depth";
-#endif
-        return -1;
+    if (findHash(hash, hashValue) &&
+        hashValue.type != hashfEMPTY &&
+        hashValue.depth > depth) {
+#ifdef DEBUG_MODE
+        qDebug() << "Skip recordHash coz depth";
+#endif
+        return -1;
     }
 
     hashValue.value = value;