an integrated structure layout of functional blocks and interconnections for an integrated circuit chip . data dependency comparator blocks are arranged in rows and columns . this arrangement defines layout regions between adjacent ones of the data dependency comparator blocks in the rows . tag assignment logic blocks are coupled to the data dependency comparator blocks to receive dependency information . the tag assignment logic blocks are positioned in one or more of the layout regions so as to be integrated with the data dependency comparator blocks to conserve area on the semiconductor chip and to spatially define a channel in and substantially orthogonal to one or more of the rows . register file port multiplexer blocks are coupled to output lines of the tag assignment logic block adjacent to the orthogonal channel to receive tag information and to pass the tag information to address ports of a register file .