Performance optimization of synchronous control units for datapaths with variable delay arithmetic units

Nowadays, variable delay arithmetic units have been used for implementing a datapath of a target system in pursuit of performance improvement. However, the adoption of variable delay arithmetic units requires modification of a typical synchronous control unit design methodology. A telescopic arithmetic unit based methodology is one of the representative methodologies used to design synchronous control units for variable delay datapaths. In this paper, we propose two optimization methods for it. The proposed optimization techniques are analyzed in order to show their performance improvement effects explicitly.