Fastest way to fill SIMD-vector with data

[Kulakov, Igor]

Hi Matthias,

what is actually current the fastest way to fill a vector with data?
Before Vc didn't let us to assign a data entry by entry and we used Memory class. Like this:

 float_v::Memory tmpFloat;
 for(int iV=0; iV < float_v::Size; iV++) 
   tmpFloat[iV] = t0[iV]->X();
 tmpVec.load( tmpFloat );
 t.SetX(tmpVec);


But will it be optimised by compiler to be equivalent to desired:


 for(int iV=0; iV < float_v::Size; iV++) 
   t.fX[iV] = t0[iV]->X();


?

May be there is even faster way if the input data is not aligned?


I tried to find a use case of Vc::Memory in Vc-0.7 doxygen documentation and failed. When exactly we should use this class?



Best regards,
Igor