Queue having long word length

摘要

A queue apparatus comprises a multi-stage queue latch for storing instruction codes or data in a first-in first-out manner; a first queue pointer associated with the queue latch for indicating a read position of an upper half place portion of the instruction codes or data stored in the queue latch and a second queue pointer associated with the queue latch for indicating a reading position of a lower half place portion of the instruction codes or data stored in the queue latch. An exchanger is coupled in order to the queue latch to receive the upper and lower half place portions of the instruction codes or data read out form the queue latch and for selectively exchanging the positions of the received upper and lower half place portions.