1. Give the op code and number of bytes of code for each of these instructions.

Question

1.         Give the op code and number of bytes of code for each of these instructions. 28 points

(a)        mov ecx, 984                                         Op Code______          Number of Bytes _____

(b)        xchg eax, ecx                                      Op Code______          Number of Bytes _____

(c)        add eax, ecx                                         Op Code______          Number of Bytes _____

(d)        add eax, value                                       Op Code______          Number of Bytes _____

            (assume value references a doubleword in memory)

(e)        inc edx                                                     Op Code______          Number of Bytes _____

Explanation / Answer

Following is the solution of the question asked:

(a)        mov ecx, 984                                         Op Code MOV Number of Bytes= 1

(b)        xchg eax, ecx                                      Op Code XCHG Number of Bytes = 1

(c)        add eax, ecx                                         Op Code ADD Number of Bytes = 1

(d)        add eax, value                                       Op Code ADD Number of Bytes = 1

            (assume value references a doubleword in memory)

(e)        inc edx                                                     Op Code INC Number of Bytes = 1

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