I did a quick scan for all methods in vdsp framework but didn't found a method for this specific task. Is there a method for that I may have overseen?
float multiplyAndAccumulate (float* p1, float* p2, int N)
{
float s = 0;
const float* e = p1 + N;
while (p1 != e)
{
s += (*p1) * (*p2);
p1++;
p2++;
}
return s;
}
Ah I guess this must be the right function
https://developer.apple.com/documentation/accelerate/vdsp/3240838-add#declaration
But how do I use this with c++?
The Obj-C equivalent of that method is https://developer.apple.com/documentation/accelerate/1450275-vdsp_vsadd?language=objc
And, mentioned in this post (https://developer.apple.com/forums/thread/699949):
The Accelerate “Objective C” API is actually usable from C/C++ - it doesn’t use any Obj-C only features.
Thanks for your help!
Actually I don't think this is exactly what I wanted (sum of all element-wise products of two arrays), I misinterpreted the description of the function.
In the meantime I already created my own arm neon assembler-code for that purpose.