1. A cell library generator of a computer system, the cell library generator comprising: a precharacterization voltage generator for generating a set of precharacterization output voltage values; an output current signal generator for generating output current signals for each of the set of precharacterization output voltage values; and a model definition compiler for compiling data from the precharacterization voltage generator and the output current signal generator into a cell library, wherein the cell library includes a set of cell entries, each cell entry comprising: a first cell identifier, the first cell identifier corresponding to a first cell; a first set of model definition data for a driver model, the first set of model definition data being associated with the first cell identifier, the first set of model definition data comprising: a first set of output voltage values; a first set of output current signals, each of the first set of output current signals being indexed by one of the first set of output voltage values; and a first input slew value, each of the first set of output current signals being indexed by the first input slew value; and a second set of model definition data for the driver model, the second set of model definition data being associated with the first cell identifier, the second set of model definition data comprising: a second input slew value; and a second set of output current signals, each of the second set of output current signals being indexed by the second input slew value and one of the first set of output voltage values, wherein the cell library generator is implemented using the computer system.