ANORDNUNG UND VERFAHREN ZUR UMORDNUNG EINES SPEICHERFORMATS IN EINEM MIKROPROZESSOR

摘要

A microprocessor has an instruction for performing an in-place byte swap on 32-bit data type to convert data stored in a big-endian memory format to a little-endian memory format, or vice-versa. A modified barrel shifter includes a plurality of multiplexers for selectively coupling data from one or more input buses to an output bus. The coupling of the individual bit lines of the data buses is arranged such that the lower order bits of the 32-bit quantity are exchanged with the higher order bits. Control lines connected to each of the multiplexers provide a means for controlling the byte swapping operation. <IMAGE>