Module compaction in FPGA-based regular datapaths

When relying on module generators to implement regular datapaths on FPGAs, the coarse granularity of FPGA cells can lead to area and delay inefficiencies. We present a method to alleviate these problems by compacting adjacent modules using structure extraction, local logic synthesis, and cell replacement. The regular datapath structure is exploited and preserved, achieving faster layouts after shorter tool run-times.