intops

intops is a Nim library with ready-to-use core primitives for CPU-sized integers. It is intended to be used as a foundation for other libraries that rely on manipulations with big integers, e.g. cryptography libraries.

intops offers a clean high-level API that hides the implementation details of an operation behind a dispatcher which tries to offer the best implementation for the given environment. However, you can override the dispatcher's choice and call any implementation manually.

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intops aims to satisfy the following requirements:

1. Offer a complete set of arithmetic primitives on signed and unsigned integers necessary to build bignum and cryptography-focuced libraries: addition, subtraction, multiplication, division, and composite operations.
2. Support 64- and 32-bit integers.
3. Support 64- and 32-bit CPUs.
4. Support Windows, Linux, and macOS.
5. Support GCC-compatible and MSVC compilers.
6. Support runtime and compile time usage.
7. Offer the best implementaion for each combination of CPU, OS, C compiler, and usage time.
8. Allow the user to pick the implementation manually.