  We present the multispin coding for the nonequlibrium reweighting method of
the Monte Carlo simulation, that was developed by the present authors. As an
illustration, we treat the driven diffusive lattice gas model. We use the
multispin coding technique both for the spin update and for the calculation of
the histogram of incremental weights, which is needed in the calculation of
nonequlibrium reweighting. All the operations are executed by the bitwise
logical commands.
