作者newpuma (還很新)
看板Grad-ProbAsk
標題[理工] 計組 the direct addressing mode
時間Sat Dec 17 15:49:51 2016
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...
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※ 編輯: newpuma (223.137.122.253), 12/17/2016 16:33:22
推 Transfat: 題目說找錯誤的選項欸，所以A是錯的吧12/17 18:32
小弟精神狀況差 眼殘QQ
推 Transfat: indexed mode我上網查了一下，和Base addressing mode差 12/17 18:34
→ Transfat: 不多，可參考12/17 18:35
→ Transfat: 啊啊 網址太長了貼不下12/17 18:36
→ Transfat: 反正打computer architecture indexed mode會有啦 12/17 18:36
推 aa06697: 使用mips的就不會support喔只有課本上那五種 另外像是sta12/17 19:52
→ aa06697: ck machine也不會有12/17 19:52
感恩感恩！
推 r901042004: 可以參考MSP430的架構，addressing mode有很多種 12/17 20:56
※ 編輯: newpuma (223.137.122.253), 12/17/2016 21:31:14