What are the different stages in pipelining in DSP?

1. Pipelining • Pipelining is a key feature in a digital signal processor to get parallel instructions working properly. There are three stages of pipelining: – program fetch, decode, and execute.

What is pipeline depth in DSP?

The number of overlapable operations of which an instruction is comprised is known as the depth of the pipeline. The minimum depth is three (fetch, decode, execute), typical values are four or five, but by dividing the arithmetic operation into stages the maximum depth may be larger.

What are the four stages of the pipelining process?

A generic pipeline has four stages: fetch, decode, execute and write-back.

What is the basic aim of pipelining?

Pipelining aims at increasing throughput by cutting combinational depth into several separate stages of approximately uniform computational delays by inserting registers in between. The combinational logic between two subsequent pipeline registers is designed and optimized to compute one specific subfunction.

How does pipelining work in a DSP system?

For example, it can either increase the clock speed or reduce the power consumption at the same speed in a DSP system. Pipelining allows different functional units of a system to run concurrently.

How is pipelining used in a data processing unit?

The output of the first pipeline becomes the input for the next pipeline. It is like a set of data processing unit connected in series to utilize processor up to its maximum. In the first subtask, the instruction is fetched. The fetched instruction is decoded in the second stage. In the third stage, the operands of the instruction are fetched.

How are the subtasks divided in a pipelining system?

In pipelining the instruction is divided into the subtasks. Each subtask performs the dedicated task. The instruction is divided into 5 subtasks: instruction fetch, instruction decode, operand fetch, instruction execution and operand store.

How does pipelining increase the overall instruction throughput?

Instructions enter from one end and exit from another end. Pipelining increases the overall instruction throughput. In pipeline system, each segment consists of an input register followed by a combinational circuit.