Create a fast simulation data structure, with all necessary arrays, and components ordered for evaluation. This function also creates the reducer functions for each component similar to the reducer builder in Builder, but with inputs and outputs using the FastSimulation mutable arrays

True if all conditions are fulfiled for the component to be in the next batch to be reduced. Used when ordering components.

Change an input and make simulation correct. N.B. step must be the latest time-step since future steps are not rerun (TODO: perhaps they should be!)

Change multiple inputs in one batch before re-running the simulation NOTE - Only used in TruthTable

Check all the active FastComponents to ensure everything is valid Use data from initialisation to write any not-yet-written component output widths

Extract top-level inputs or outputs with names and wire widths. Used by legacy code.

return output port data from simulation as a Bit list Each element in list is one bit

return state data from simulation

Extract all Viewer components with names and wire widths. Used by legacy code.

Look up a simulation component (not a FastComponent)

Look up a simulation (not a FastSimulation) component or return None.

True if the component is combinational

print function for debugging

Run an existing fast simulation up to the given number of steps. This function will mutate the write-once data arrays of simulation data and only simulate the new steps needed, so it may return immediately doing no work. If the simulation data arrays are not large enough they are extended up to a limit. After that, they act as a circular buffer. TimeOut if not None is the cutoff time after which the simulation terminates execution unfinished. Use fs.ClockTick to determine whether simulation has completed. returns speed, in clock cycles per ms, or None if complete