Given the branch sequence TTTTNTTNNTTTTTNNNNNNNNNTNTTTTTTTTTTTT and assuming that the 3?bit saturating predictor starts in its saturated T state, what will the predicted sequence be?
The following code is executed by an ARM processor:
MOV r0,#4
B1 MOV r2,#5
SUB r2,r2,r0
B2 SUBS r2,r2,#1
BNE B2 ;Branch 1
SUBS r0,r0,#1
BNE B1 ;Branch 2
Assume that a 1?bit branch predictor is used for both branch 1 and branch 2 and that both predictors are initially
set to N. Complete the following table by running through this code.
Repeat the same exercise with the same initial conditions but assume a 2?bit saturating counter branch predictor.
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