Synthesis for multiple input wires replacement of a gate for wiring consideration
Shih-Chieh Chang, Jung-Cheng Chuang, Zhong-Zhen Wu · 1999
The single wire replacement attempts to replace a target wire by another wire without changing the circuit functionality. Due to the large searching space required, there is very little success in directly extending the single wire replacement technique to replace multi-ple wires at the same time. The objective in this paper is to propose a new logic transfor-mation, called the alternative node (Alnode) technique, which attempts to replace multiple wires at a time. Basically, the transformation simultaneously replaces multiple input wires of a gate by a new set of input wires. To accomplish the transformation, we propose sev-eral speedup theorems for replacing multiple wires. In this paper, we also demonstrate that the Alnode technique can be applied to achieve power reduction for domino logic and wire length minimization in layouts. The experimental results are encouraging. 1