def toSimModel(unit, targetPlatform=DummyPlatform(), dumpModelIn=None):
    """
    Create a simulation model for unit

    :param unit: interface level unit which you wont prepare for simulation
    :param targetPlatform: target platform for this synthes
    :param dumpModelIn: folder to where put sim model files
        (otherwise sim model will be constructed only in memory)
    """
    sim_code = toRtl(unit,
                     targetPlatform=targetPlatform,
                     saveTo=dumpModelIn,
                     serializer=SimModelSerializer)
    if dumpModelIn is not None:
        d = os.path.join(os.getcwd(), dumpModelIn)
        dInPath = d in sys.path
        if not dInPath:
            sys.path.insert(0, d)
        if unit._name in sys.modules:
            del sys.modules[unit._name]
        simModule = importlib.import_module(unit._name)

        if not dInPath:
            sys.path.remove(d)
    else:
        simModule = ModuleType('simModule')
        # python supports only ~100 opened brackets
        # it exceded it throws MemoryError: s_push: parser stack overflow
        exec(sim_code, simModule.__dict__)

    return simModule.__dict__[unit._name]
Create a simulation model for unit

    :param unit: interface level unit which you wont prepare for simulation
    :param targetPlatform: target platform for this synthes
    :param dumpModelIn: folder to where put sim model files
        (otherwise sim model will be constructed only in memory)