# OTBN Code Snippets

This directory contains some code snippets that give examples of how
to do various tasks in OTBN code.

- `modexp.s`: An example of how to do modular exponentiation.
- `pseudo-ops.s`: An example of the pseudo-operations supported by the OTBN ISA.
- `mul256.s`: An example of a 256x256 bit multiply using the MULQACC
  instruction.
- `mul384.s`: An example of a 384x384 bit multiply using the MULQACC
  instruction.
- `barrett384.s`: An example of a modular multiplication kernel based on
  Barrett reduction.

Also included in this directory is a Makefile fragment that can be
used to assemble and link the snippets. This can be used standalone or
included in another Makefile.