John wrote:
Does anyone know of a 128bit number implementation?
I can use "long long" to get 64 bit numbers on my machine.
Anyone has "paired" two longs together using simd/code
to do this? Is this available in any particular compiler?
Search back through the archives for things like
"arbitrary accuracy" and "very long integers" and
things like that. There have been posts on libs with
numerical accuracy of arbitrary length. Of course,
you will find that things get slower with longer
numbers, in some cases much slower. There is also,
of course, an overhead to having the mechanism for
unlimited accuracy even when you do calcs that only
require a regular number of digits.
Socks