Multi-domain clock skew scheduling-aware register placement to optimize clock distribution network

Multi-domain clock skew scheduling is a cost effective technique for performance improvement. However, the required wire length and area overhead due to phase shifters for realizing such clock scheduler may be considerable if registers are placed without considering assigned skews. Focusing on this issue, in this paper, we propose a skew scheduling-aware register placement algorithm that enables clock tree optimization by considering domains assigned to registers in placement. Our experimental results show that the proposed approach remarkably decreases clock wire length and clock network power consumption at the cost of a slight increase in total wire length.