[pyrtsa]

Seven years ago, maybe. But today's GPUs do it easily in their programmable pipeline (shaders).

And where conditionals are costly, you can use tricks like:

    float temp = min(x, y);
    x = max(x, y);
    y = temp;

instead of the conditional swapping operations, to make the whole network sorting algorithm deterministic. (Edit: notice that min() and max() here are hardware operations.)