Thank you for the info. This is very new to me, this multiple-layer CUDA cake. In looking at my problem of pow(z, n), the Base method that performs this is a brute force algorithm of powers_by_squaring, essentially looping z *= z enough times to produce the result. I copied over the code from Base and slightly tweaked. It’s probably not in-linable, but it works! I’m sorta amazed, actually. I’ll submit a PL so you can have a look.
But now I have another problem, with GPU compilation failing because of non-isbit types. I’ll post a new question about that.
Thanks again!