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    <p>If someone is interested this is the dirty code I come with to test a new idea that I came with while reading about the library that Paul posted.</p> <p>Thanks Paul!</p> <pre><code>// This is just a conceptual test // I haven't profile the code and I haven't verified if the result is correct #include &lt;xmmintrin.h&gt; // This class is doing all the math template &lt;bool SIMD&gt; class cStreamF32 { private: void* m_data; void* m_dataEnd; __m128* m_current128; float* m_current32; public: cStreamF32(int size) { if (SIMD) m_data = _mm_malloc(sizeof(float) * size, 16); else m_data = new float[size]; } ~cStreamF32() { if (SIMD) _mm_free(m_data); else delete[] (float*)m_data; } inline void Begin() { if (SIMD) m_current128 = (__m128*)m_data; else m_current32 = (float*)m_data; } inline bool Next() { if (SIMD) { m_current128++; return m_current128 &lt; m_dataEnd; } else { m_current32++; return m_current32 &lt; m_dataEnd; } } inline void operator=(const __m128 x) { *m_current128 = x; } inline void operator=(const float x) { *m_current32 = x; } inline __m128 operator+(const cStreamF32&lt;true&gt;&amp; x) { return _mm_add_ss(*m_current128, *x.m_current128); } inline float operator+(const cStreamF32&lt;false&gt;&amp; x) { return *m_current32 + *x.m_current32; } inline __m128 operator+(const __m128 x) { return _mm_add_ss(*m_current128, x); } inline float operator+(const float x) { return *m_current32 + x; } inline __m128 operator*(const cStreamF32&lt;true&gt;&amp; x) { return _mm_mul_ss(*m_current128, *x.m_current128); } inline float operator*(const cStreamF32&lt;false&gt;&amp; x) { return *m_current32 * *x.m_current32; } inline __m128 operator*(const __m128 x) { return _mm_mul_ss(*m_current128, x); } inline float operator*(const float x) { return *m_current32 * x; } }; // Executes both functors template&lt;class T1, class T2&gt; void Execute(T1&amp; functor1, T2&amp; functor2) { functor1.Begin(); do { functor1.Exec(); } while (functor1.Next()); functor2.Begin(); do { functor2.Exec(); } while (functor2.Next()); } // This is the implementation of the problem template &lt;bool SIMD&gt; class cTestFunctor { private: cStreamF32&lt;SIMD&gt; a; cStreamF32&lt;SIMD&gt; b; cStreamF32&lt;SIMD&gt; c; public: cTestFunctor() : a(1024), b(1024), c(1024) { } inline void Exec() { c = a + b * a; } inline void Begin() { a.Begin(); b.Begin(); c.Begin(); } inline bool Next() { a.Next(); b.Next(); return c.Next(); } }; int main (int argc, char * const argv[]) { cTestFunctor&lt;true&gt; functor1; cTestFunctor&lt;false&gt; functor2; Execute(functor1, functor2); return 0; } </code></pre>
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