How to translate C++ code to SSE?

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C++

Hi all,
Listed below is my code. I don't know how to tanslate C++ code to SSE?

int i,j;
   for ( i = 1; i < NGRAY - mlevel; i++) // t1
     {
#pragma omp parallel for
      for ( j = i + 1; j < NGRAY - mlevel + 1; j++) // t2
       {
       float Sq = H[1][i] + H[i + 1][j] + H[j + 1][255];
         if (maxSig < Sq)
            {
                t[1] = i;
                t[2] = j;
                 maxSig = Sq;
             }
       }

I think the code like:

__m128 mmaxSig=_mm_set_ps1((float)0);
 for ( i = 1; i < NGRAY - mlevel; i++) // t1
    {
#pragma omp parallel for
        for ( j = i + 1; j < NGRAY - mlevel + 1; j+2) // t2
          {
            __m128 h1,h2,h3,msq;
            h3=_mm_load_pd((double *)H[j+1][255]);
            h2=_mm_load_pd((double *)H[i+1][j]);
            h1=_mm_set_ps1((double)*H[1][i]);
            msq=_mm_add_pd(h1,_mm_add_ps(h2,h3));
            __m128 mask=_mm_cmplt_pd(mmaxSig,msq);
            ......

But ,I can't go on.Anyone could help me?
Thanks.