Pattern-based fpga logic block and clustering algorithm

A routing architecture for fast interconnections between Look-Up Tables (LUTs) in a group of Basic Logic Elements (BLEs), whereby a size of the group ranges from 1 to k+1, where k is the number of inputs of a LUT, and LUTs in the group are indexed from 1 to k+1, and whereby (a) an output of a LUTi, 1≦̸i≦̸k, connects to one of the inputs of routing multiplexers of LUTj, i