Access vector type OpenCL

Question

I have a variable whithin a kernel like:

int16 element;

I would like to know if there is a way to adress the third int in element like

Answer 1

It is possible, but it not as efficient as direct array accessing.

float index(float4 v, int i) {
    if (i==0) return v.x;
    if (i==1) return v.y;
    if (i==2) return v.z;
    if (i==3) return v.w;
}

But of course, if you need component-wise access this way, then chances are that you're better off not using vectors.