The following code is executed by an ARM processor: Assume that a 1-bit branch predictor is used

Question:

The following code is executed by an ARM processor:

B1 B2 MOV MOV SUB SUBS BNE B2 SUBS r0, r0, #1 BNE B1 r0, #4 r2, #5 r2, r2, ro r2, r2, #1 ;Branch 1 ;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.

23 46849SAWN Branch Branch Branch Branch Cycle prediction outcome Cycle prediction outcome 1 N N N T Branch 1

Repeat the same exercise with the same initial conditions but assume a 2-bit saturating counter branch predictor.

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Computer Organization And Architecture Themes And Variations

ISBN: 9781111987046

1st Edition

Authors: Alan Clements

Question Posted: Jan 22, 2024 08:01 AM

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The following code is executed by an ARM processor: Assume that a 1-bit branch predictor is used

Question:

B1 B2 MOV MOV SUB SUBS BNE B2 SUBS r0, r0, #1 BNE B1 r0, #4 r2, #5 r2, r2, ro r2, r2, #1 ;Branch 1 ;Branch 2

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Branch 1 Cycle Branch prediction Branc...View the full answer

Computer Organization And Architecture Themes And Variations

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