HEADER TRANSFORMATION DATAPATH

摘要

A communication packet processing device may include a control stage coupled to receive multiple headers of a packet comprised of multiple words, and to determine a destination lane for each word of the multiple headers by counting previous words of the headers. The device may also include a level 1 permutation circuit coupled to the control stage to place each word into a correct lane responsive to the determined destination lane, and a level 2 permutation circuit coupled to the level 1 permutation t circuit o place each word into a correct designation lane responsive to the determined destination lane. Additional embodiments are also described.

主权项

1. A communication packet processing device comprising:
a control stage coupled to receive multiple headers of a packet comprised of multiple words, and to determine a destination lane for each word of the multiple headers by counting previous words of the multiple headers to provide a determined destination lane for each word; a level 1 permutation circuit coupled to the control stage to place each word into an output lane according to the determined destination lane; and a level 2 permutation circuit having an input coupled to an output of the level 1 permutation circuit, the level 2 permutation circuit to place each word into a correct designation lane according to the determined destination lane.