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Ch5 管線化(Pipeline)
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54. Instruction Level Parallelism、Loop Unrolling、Register Renaming
#CC-05-054
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Instruction Level Parallelism
Loop Unrolling
Register Renaming
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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.
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