Hi Thomas,

In a pinch, you can use Zarith and follow each arithmetic operation by a
Z.extract or Z.signed_extract operation to normalize the result to the
desired range (N-bit unsigned or N-bit signed).  It's not as fast as it
could be, but should be reasonably efficient.

- Xavier Leroy



2014-05-20 17:18 GMT+02:00 Thomas Braibant <thomas.braibant@gmail.com>:

> Hi list,
>
> I wonder if there is a publicly available library that implements
> arbitrary precision (un)signed integers. I could not find anything
> relevant with Google, nor on Opam.
>
> By arbitrary, I mean that I want to implement e.g., 43 bits unsigned
> arithmetic, and have the right overflow behaviors. I know of zarith
> which seems to implement arbitrary precision in the sense that the
> precision of the numbers grows as needed.
>
> Best,
> Thomas
>
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