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Library for moving between sequential circuits AIGs and DFAs.

Project description

py-aiger-dfa

Python library for converting between AIG circuits and DFAs.

Build Status codecov PyPI version License: MIT

Table of Contents

Installation

If you just need to use aiger_dfa, you can just run:

$ pip install py-aiger-dfa

For developers, note that this project uses the poetry python package/dependency management tool. Please familarize yourself with it and then run:

$ poetry install

Usage

The main entry points for using this library are the dfa2aig and aig2dfa functions. DFAs are represented using the dfa package. Familiarity with the dfa, py-aiger, and py-aiger-bv packages is assumed.

DFA to AIG

An example of going from a DFA to an AIG object is shown below.

from dfa import DFA
from aiger_dfa import dfa2aig

my_dfa = DFA(
    start=0,
    inputs={0, 1},
    label=lambda s: (s % 4) == 3,
    transition=lambda s, c: (s + c) % 4,
)
my_aig, relabels = dfa2aig(my_dfa)

Now circ is an AIG and relabels is a mapping from the inputs, states, and outputs of my_dfa to their 1-hot encoded counterparts in my_aig.

relabels has the following schema:

relabels = {
    'inputs': .. , # Bidict from 1-hot index to dfa input.
    'outputs': .. , # Bidict from 1-hot index to dfa output.
    'states': .. , # Bidict from 1-hot index to dfa state.
}

where bidict refers to https://bidict.readthedocs.io/en/master/.

AIG to DFA

The inverse of dfa2aig is aig2dfa. Using the same example.

from aiger_dfa import aig2dfa

my_dfa2 = aig2dfa(my_aig, relabels=relabels)

assert my_dfa2.label((1,0,0,1,1,0)) == my_dfa.label((1,0,0,1,1,0))

Project details


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