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

(f)        inc DWORD PTR [edx]                        Op Code______          Number of Bytes _____

(g)        neg value                                                Op Code______          Number of Bytes _____

            (assume value references a doubleword in memory)

(h)        neg edx                                                       Op Code______          Number of Bytes _____

(i)         neg DWORD PTR [edx]                           Op Code______          Number of Bytes _____

(j)         add ecx, 894                                         Op Code______          Number of Bytes _____

Explanation / Answer

Following are the answers:

(f)        inc DWORD PTR [edx]                        Op Code INC Number of Bytes = 1

(g)        neg value                                                Op Code NEG Number of Bytes = 2

            (assume value references a doubleword in memory)

(h)        neg edx                                                       Op Code NEG Number of Bytes = 2

(i)         neg DWORD PTR [edx]                           Op Code NEG Number of Bytes = 4

(j)         add ecx, 894                                         Op Code ADD Number of Bytes = 4

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