The use of pipelining in a processor to improve efficiency

Question 1

What is pipelining?

Answer 1

Pipelining is the process of completing the fetch, decode, and execute cycles of three
separate instructions simultaneously, holding appropriate data in a buffer in close proximity
to the CPU until it’s required

Question 2

What is the aim of pipelining?

Answer 2

Pipelining is aimed to reduce the amount of the CPU which is kept idle

Question 3

What is instruction pipelining?

Answer 3

Separating out the instruction into fetching, decoding, and executing.

Question 4

What is arithmetic pipelining?

Answer 4

Breaking down the arithmetic operations and overlapping them as they are performed

Question 5

0 LDA &7
1 ADD #4
2 OUT
3 HLT
4 6
5 2
Explain how pipelining would help a CPU execute the code more quickly

Answer 5

Pipelining would allow one instruction to be fetched as the previous one is being decoded and the one before that is being executed
- e.g. OUT could be fetched as there are no jump/branch instructions, it pipelines well (as there is no need to flush the pipeline)