int <-> floating point interface and Vc::SimdArray

[Sandro Wenzel]

Hi,

I have a question on Vc::SimdArray and whether it could be used to
construct integer types that can convert to double_v.

In other words, consider:

typedef Vc::SimdArray<int, Vc::double_v::Size> I_t;

void bar(int *array) {
  I_t x(array);
  for(unsigned int i =0;i<I_t::Size;++i){
    std::cout << x[i] << "\n";
  }

  Vc::double_v d(x); // converting from integer to double
  std::cout << d << "\n";

// expect output [1,2,3,4] on AVX
// expect output [1,2] on SSE
}


int main(){

  int b[8]={1,2,3,4,5,6,7,8};
  bar(b);

}

This code is doing what I want on AVX but on SSE, it returns the variable d
as [1,1]; My simple question is whether Vc::SimdArray can be used to make
the handshake between int and double types easier?

Thanks and best

Sandro


-- 
Dr. Sandro Wenzel
PH / SFT
CERN
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