evaluated
HFPGA architectures using a hierarchical routing structure.
The results showed that an optimized HFPGA can
be implemented using fewer routing switch blocks. Li
and Anerji[13] investigated the routability prediction
problem for HFPGA. They proposed a model to analyze
various HFPGA configurations and developed a
software tool to predict the routability of the circuits on
specific HFPGA architectures.