vec: more strongly hint on generating fsrra instructions

math/mat3x3.hpp

@@ -37,7 +37,7 @@ public:
   inline constexpr typename mat<3, 3, T>::row_type const &
   operator[](int i) const;
 
-  void operator=(const mat<3, 3, T>&) = delete;
+  //void operator=(const mat<3, 3, T>&) = delete;
 
 };
 

math/vec.hpp

@@ -18,7 +18,8 @@ inline constexpr T magnitude_squared(vec<L, T> const& v)
 template <int L, typename T>
 inline constexpr vec<3, T> normalize(vec<L, T> const& v)
 {
-  return v / magnitude(v);
+  T d = 1.0f / magnitude(v);
+  return v * d;
 }
 
 template <int L, typename T>