Yes, it would make sense. On Fri, Sep 25, 2020 at 5:25 PM Niels Möller <ni...@lysator.liu.se> wrote:
> Jeffrey Walton <noloa...@gmail.com> writes: > > > I believe the 64-bit adds (addudm) and subtracts (subudm) require > > POWER8. > > I don't think there are any 64-bit adds in my chacha code, only 32-bit, > vadduwm. The chacha state is fundamentally 16 32-bit words, with > operations very friendly to 4-way simd. > > Using 64-bit adds might be useful for later code doing multiple blocks, > for updating the counter (for the original 64-bit counter variant of > chacha). Might make sense to do manual carry handling to keep it working > on power7. > > So it would make sense to add the code to a new directory powerpc64/p7/ ? > > Regards, > /Niels > > -- > Niels Möller. PGP-encrypted email is preferred. Keyid 368C6677. > Internet email is subject to wholesale government surveillance. > _______________________________________________ > nettle-bugs mailing list > nettle-bugs@lists.lysator.liu.se > http://lists.lysator.liu.se/mailman/listinfo/nettle-bugs > _______________________________________________ nettle-bugs mailing list nettle-bugs@lists.lysator.liu.se http://lists.lysator.liu.se/mailman/listinfo/nettle-bugs
