1. A processor, comprising: a reservation queue; a renamer coupled to the reservation queue and configured to produce a generation number and to communicate the generation number to the reservation queue; a register coupled to the reservation queue and configured to store a value; an execution pipe coupled to the reservation queue; and a buffer coupled to the execution pipe and configured to receive an output of the execution pipe, and further coupled to the reservation queue and configured to communicate the output of the execution pipe to the reservation queue.