試題詳解

複選題
9. About instruction level parallelism, which of the followings are true?
(A)To perform loop unrolling, loop iterations must be independent with no loop-carried dependence.
(B) True dependencies can be resloved by register renaming.
(C)Anti-dependence occurs when instruction j writes a register or memory location that. instruction i read from, and instruction i is executed first.
(D)Loop unrolling can reduce control stalls.
(E) Issuing multiple instructions per cycle can not reduce ideal CPI.