JitArm64: Turn IsImmLogical into a constexpr constructor

Source/Core/Common/BitUtils.h

@@ -413,4 +413,13 @@ constexpr int CountLeadingZeros(uint32_t value)
 
 #undef CONSTEXPR_FROM_INTRINSIC
 
+template <typename T>
+constexpr T LargestPowerOf2Divisor(T value)
+{
+  static_assert(std::is_unsigned<T>(),
+                "LargestPowerOf2Divisor only makes sense for unsigned types.");
+
+  return value & -static_cast<std::make_signed_t<T>>(value);
+}
+
 }  // namespace Common