initialize float4 (core.simd)

[Bogdan]

Well, this seems to be working:

> float[4] doSimd(float[4] values, float delta)
> {
>   float4 v_delta = delta;
> 
>   float4 v_values = __simd(XMM.ADDPS,
>                            __simd(XMM.LODAPS, values[0]),
>                            v_delta);
> 
>   return [v_values[0], v_values[1],v_values[2],v_values[3]];
> }

Not sure if it's correct though.