Purpose of using Instruction Queue

Author: Tanmay Chakrabarty

First Published On: Monday, June 27, 2011 at 12:28 AM
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Purpose of using Instruction Queue:

BIU contains an instruction queue. When the EU executes instructions, the BIU gets up to 6 bytes of the next instruction and stores them in the instruction queue and this process is called instruction prefetch. This is a process to speed up the processor. A subtle advantage of instruction queue is that, as next several instructions are usually in the queue, the BIU can access memory at a somewhat "leisurely" pace. This means that slow-memory parts can be used without affecting overall system performance.

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