[問題] 計組-addressing mode
A displacement addressing mode has an offset specified relative to a
base value. An example is shown below:
Add R4,100(R1) (meaning: R4<-R4+M[100+R1])
The value 100 in the above example is called the displacement.
In a machine in which all instructions are 32 bits with a 6-bits opcode,
what is the maximum value of the displacement. Assume that the machine has
32 general-purpose registers.
書上寫:32－6－5－5＝16 bit
可是後面又寫了一句：如果以2's complement 來表示，最大正值為2^15 -1
這是什麼意思呢?
謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 61.228.97.36
推
05/06 01:00, , 1F
05/06 01:00, 1F
→
05/06 01:06, , 2F
05/06 01:06, 2F