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.

(k)        imul eax, ecx                                      Op Code______          Number of Bytes _____

(l)         div value                                                Op Code______          Number of Bytes _____

            (assume value references a doubleword in memory)

(m)      div DWORD PTR [edx]                        Op Code______          Number of Bytes _____

(n)       cdq                                                                 Op Code______          Number of Bytes _____

Explanation / Answer

k. opcode : IMUL and number of bytes = 2 (Signed multiplication)

i. opcode : DIV and number of bytes = 2 (1 for quotient and another for reminder)

m. opcode : DIV and number of bytes = 2

n.opcode : CDQ and number of bytes = 4 (converts double to quad)

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