An Arithmetic Logic Unit (ALU) normally contains a number of multiplexer circuits. How many of these might you expect to find in an ALU in a modern CPU chip, and what is their purpose?

FYI, We don’t do homework here.

Hint:
Realize that an ALU needs to be fed instructions (opcodes) and that they will need to be decoded. This question is also somewhat dated.

Also look at the block diagram of a pipeline

The ALU itself can be depicted as multiplexers along with adders…

Hi, this is not Homework, it’s question from past exam. I do post here when I have problem or not sure about answer, Thanks.

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Homework Questions
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It is not against the rules to ask homework questions. In general, the community expects that homework questions will demonstrate that the asker has already done some independent work on the problem, and responses may be removed if they just give away the answer instead of prompting the asker to work it out. Requesting and providing help, however, are both allowed. So while @Walodchy has clarified that this is not a homework question, it doesn’t matter in any case.