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Authors:
Linda Null ,julia Lobur
Chapter:
A Closer Look At Instruction Set Architectures
Exercise:
Review Of Essential Terms And Concepts
Question:2 | ISBN:9780763704445 | Edition: 3

Question

2. Several design decisions exist with regard to instruction sets. Name four and explain.

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Answer

 The design decisions exist with regard to instruction sets :

1) Complexity: How much efforts are required to decode an instruction, how complex it is and what amount of time will be required.

2) Space: While designing the total amount of space needs to be calculated as everything comes with a cost and we need to have a better design with as minimal cost as it could be.

3) Length: The length of instruction needs to undergo thinking while design decision, do we need fixed length instruction or variable length as before executing the instruction the CPU needs to first decode the instruction size and again everything comes with a price.

4) Number: Number of instructions needs to be thought properly as the more number of instructions the more time consuming and complex the design becomes.

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