[理工] 計組 the direct addressing mode

看板Grad-ProbAsk作者newpuma (還很新)時間9年前 (2016/12/17 15:49)推噓5(5推 0噓 4→)

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題目： Addressing modes constitute a very important topic when people discuss alterna tive designs of CPUs. Common addressing modes include register, immediate, dir ect, and PC-relative mode, etc. Find a wrong statement from the following choi ces. (A) Every CPU supports the direct addressing mode. (B) In practice, having immediate, direct, register, and indexed mode is enough fo r almost all applications. (C) Compilers are in charge of finding the best addressing modes for statements wr itten in high-level languages. (D) When offering a limited number of addressing modes, the architecture must make sure that common applications will be computable. (E) none of the above. 答案是給A，我不是很明白為什麼，有辦法舉出反例之類的嗎，比如哪一種架構的電腦不使用直接定址(只使用其他的定址方式)？ B選項的indexed mode也不是很懂... -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 223.137.122.253 ※ 文章網址: https://www.ptt.cc/bbs/Grad-ProbAsk/M.1481960993.A.75A.html ※ 編輯: newpuma (223.137.122.253), 12/17/2016 16:33:22

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