[AnimalMuppet]

Just go for it. In the larger scheme of things, it's not that long until 128-bit CPUs.

I'm mostly kidding. But if you're thinking of representing nanoseconds since the big bang, the wait for 128-bit CPUs is not very long...

[shakna]

GNU has extensions to support 128bit number types [0] already, for systems that can handle it.

[0] https://gcc.gnu.org/onlinedocs/gcc/_005f_005fint128.html