1. A method of processing a circuit design in a circuit design tool, comprising: identifying selection of a parameterized core to be instantiated in a description of the circuit design managed by the circuit design tool and configured for implementation in target hardware; processing a configuration file for the parameterized core to select a set of parameter values from a plurality of sets of parameter values dynamically based at least in part on the target hardware; creating an instance of the parameterized core in the circuit design having the selected set of parameter values; and implementing the circuit design for the target hardware.