Question

We are interested in realising a processor with 8 registers instead of 4. Discuss the changes that would be required to the instruction encoding to realise such a processor. Explain what other changes the instruction encoding would lead to, and how this would affect on the functionality of the processor.

Answer 1

By increasing registers the processor size may increase but the complexity of the processor will be reduced.

General processor with lower number of register sets will generally contains single memory both for instruction processing and data processing(Insturction memory and data memory) and it wil be difficult to process both instruction and data at time without delay.

So, by using more number of registers the data processing will done through registers and it will be less complex to use single memory now.

The delay will be less by incresing number of registers.

So, the functionality of the processor will increase.