convert S function into Stateflow help

I'm trying to take an S function and convert it into a stateflow for-loop chart.

Constant1 = (int)mxGetPr(ssGetSFcnParam(S,0))[0]; Constant2 = (int)mxGetPr(ssGetSFcnParam(S,1))[0]; param = (double *)mxGetPr(ssGetSFcnParam(S,2));

for (i=0;i<Constant1;i++) y[i]=0.0;       // init summation

for (i=0;i<Constant2;i++)
  {
      j=i+Constant2;
      k=j+Constant2;

        if ( param[k] != 1 )                // subtract from source                
            y[ (int)param[i]-1 ] -= u[i];   
        y[ (int)param[j]-1 ] += u[i];       // add 
    }
}

Can this be done in stateflow? If so any help would be greatly appreciated.