The instructions carried out by a central processing unit (CPU) aredevided into

Question

The instructions carried out by a central processing unit (CPU) aredevided into three classes 1) data transfer 2) Arithmetic/Logic and3) Control

in the following table the instruction R,S, T , R0 are registers.Assign each instruction to the correct class (1), (2) or (3)
1
load R from memory location X
2 Load R with data X
3 Store R at memory location X
4 Move bit pattern in R to S
5
Add the contents of S and T, put the result in R
6 Rotate right the contents of R for X times
7 If contents of R equal the contents of R0, then jump tothe instruction at address X otherwise continue as normal
8 Halt

1
load R from memory location X
2 Load R with data X
3 Store R at memory location X
4 Move bit pattern in R to S

Explanation / Answer

Dear User,       1
load R from memory locationX                         Data transfer instruction
2 Load R with dataX                                             Data transfer
3 Store R at memory locationX                               Datatransfer
4 Move bit pattern in R toS                                      Datatransfer
1
load R from memory locationX                         Data transfer instruction
2 Load R with dataX                                             Data transfer
3 Store R at memory locationX                               Datatransfer
4 Move bit pattern in R toS                                      Datatransfer
5
Add the contents of S and T, put the result inR     Arithmeticinstruction
6 Rotate right the contents of R for Xtimes             Logical instruction
7 If contents of R equal the contents of R0, then jump tothe instruction at address X otherwise continue asnormal            Control instruction
8 Halt                                                               Control instruction 5
Add the contents of S and T, put the result inR     Arithmeticinstruction
6 Rotate right the contents of R for Xtimes             Logical instruction
7 If contents of R equal the contents of R0, then jump tothe instruction at address X otherwise continue asnormal            Control instruction
8 Halt                                                               Control instruction 1
load R from memory locationX                         Data transfer instruction
2 Load R with dataX                                             Data transfer
3 Store R at memory locationX                               Datatransfer
4 Move bit pattern in R toS                                      Datatransfer

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