[pcwalton]

In Go that loop could be:

    for k, dd = 0, d[0]; k < 16; k, dd = k + 1, d[k + 1] {
        ...
    }

I don't find that significantly more readable than the C version.

[bfrog]

Yeah a quick glance and I have no clue whats going on, tl;dr in review for sure