I dont think so...
I guess int128_t under boost/multiprecision/cpp_int is the only viable option.

On Wed, 7 Apr 2021, 11:39 pm David Frank via Boost-users, <boost-users@lists.boost.org> wrote:
especially the gnu __int128?
Thanks,
David.
_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
https://lists.boost.org/mailman/listinfo.cgi/boost-users