Optimize the most common update accumalator cases w/o tiling

[stockfish] / src / misc.h

diff --git a/src/misc.h b/src/misc.h
index aed677b5b294896139b993fc82444518e135724e..52595fb906bdd448472332de91e6e63f515c0482 100644 (file)
--- a/src/misc.h
+++ b/src/misc.h
@@ -87,6 +87,7 @@ public:
   void push_back(const T& value) { values_[size_++] = value; }
   const T* begin() const { return values_; }
   const T* end() const { return values_ + size_; }
+  const T& operator[](int index) const { return values_[index]; }
 
 private:
   T values_[MaxSize];
@@ -133,13 +134,13 @@ public:
 inline uint64_t mul_hi64(uint64_t a, uint64_t b) {
 #if defined(__GNUC__) && defined(IS_64BIT)
     __extension__ using uint128 = unsigned __int128;
-    return ((uint128)a * (uint128)b) >> 64;
+    return (uint128(a) * uint128(b)) >> 64;
 #else
-    uint64_t aL = (uint32_t)a, aH = a >> 32;
-    uint64_t bL = (uint32_t)b, bH = b >> 32;
+    uint64_t aL = uint32_t(a), aH = a >> 32;
+    uint64_t bL = uint32_t(b), bH = b >> 32;
     uint64_t c1 = (aL * bL) >> 32;
     uint64_t c2 = aH * bL + c1;
-    uint64_t c3 = aL * bH + (uint32_t)c2;
+    uint64_t c3 = aL * bH + uint32_t(c2);
     return aH * bH + (c2 >> 32) + (c3 >> 32);
 #endif
 }