Multiple-Supply Voltage (MSV) is a popular and effective method for both dynamic and static power reduction while maintaining performance. Level shifters may cause area and Interconnect Length Overhead (ILO), and should be considered at both floorplanning and post-floorplanning stages. We propose a two phases algorithm framework, called VLSAF, to solve voltage and level shifter assignment problem. At floorplanning phase, we use a convex cost network flow algorithm to assign voltage and a minimum cost flow algorithm to handle level-shifter assignment. At post-floorplanning phase, a heuristic method is adopted to redistribute white spaces and calculate the positions and shapes of level shifters. The experimental results show VLSAF is effective.
Network-on-Chip (NoC) architectures have been
proposed as a promising alternative to classical bus-based communication
architectures. We propose a two phases framework to solve application-specific
NoCs topology generation problem.
At floorplanning phase, we carry out partition driven floorplanning. At post-floorplanning phase, a heuristic method and a min-cost max-flow algorithm is used to insert switches and network interfaces. Finally, we allocate paths to minimize power consumption. The experimental results show our algorithm is effective for power saving.