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What is the main difference between Fixed and Variable instructions?
What is the main difference between Fixed and Variable instructions?
- Fixed instructions are smaller than variable instructions.
- Fixed instructions are only used for simple operations, while variable instructions are used for complex operations.
- Fixed instructions are all the same size, while variable instructions can vary in size depending on the operation or operands. (correct)
- Variable instructions are always larger than fixed instructions.
What is an example of a characteristic of Variable instructions?
What is an example of a characteristic of Variable instructions?
- They have a fixed size of 32 bits.
- They are only used for simple operations.
- They are always smaller than Fixed instructions.
- They can vary in size based on the operation or the quantity/types of operands. (correct)
Why might specifying one of eight registers require a different instruction size than specifying a 16-bit address?
Why might specifying one of eight registers require a different instruction size than specifying a 16-bit address?
- Because specifying registers always requires more space than specifying addresses.
- Due to the different quantity/types of operands involved. (correct)
- Due to the fixed nature of register specifications compared to variable addresses.
- It is not possible for them to require different instruction sizes.
In the context of orthogonal repertoires, what does it mean for instructions to combine elements without any restriction?
In the context of orthogonal repertoires, what does it mean for instructions to combine elements without any restriction?
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What is a characteristic of complete orthogonality in a machine repertoire?
What is a characteristic of complete orthogonality in a machine repertoire?
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Why is complete orthogonality not present in any real machine repertoire?
Why is complete orthogonality not present in any real machine repertoire?
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