L3S2:

In Lecture Quiz 1:
Time: 8:45

Question:

Why do we not stall instructions at the fetch and decode stages if a branch in the execute stage is taken?

Choices:

A. A branch instruction should never be stalled.

B. It does not matter whether stall or redirect caused by the branch has the priority.

C. The instruction at the decode stage is invalid and the redirect caused by the branch in the execute stage should take priority.

D. It is unnecessary to invalidate stall at the decode stage, a branch can invalidate the following instructions as well.