[bodyfour]

I took a quick glance though the code... looks really good. I wonder how hard it would be to tweak it to not require compiler support for __uint128_t by replacing it with manual 64-bit ops... or is support for that type no longer limited to gcc/clang?

[marcandrysco]

Good catch! I mostly used __uint128_t out of haste. Ideally, I would like to remove dependencies on large integer types. For now, this remains future work.