tree e5656d476fff92386f877c1031b1e4f8cff444a8
parent e24346c48d1ebb0eaac065c4d5e3a785d315212c
author Rupert Swarbrick <rswarbrick@lowrisc.org> 1601307856 +0100
committer Rupert Swarbrick <rswarbrick@gmail.com> 1601636727 +0100

[otbn] Add simple ISS testing infrastructure

After breaking things a couple of times and starting to get specific
on exactly how some instructions should work, it looks like a good
idea to add some "smoke tests" for the simulator.

This patch adds a couple (checking we implement 'add' and 'addi'
correctly) but the idea is that we'll flesh that out for more
instructions in later commits.

The tests are extremely simple: each has a single assembly file,
together with a list of expected register values. We check that
assembling and linking the assembly file and running the simulation
ends up with the same values as expected.

Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>