1.

Which of the following instructions are invalid? Discuss why they are invalid? If the instruction is valid, state what does happen after it is executed.

Lets assume EAX has the value 0x000020F0 (hex 000020F0 0010 0000 1111 000). Also memory locations $20F0, $20F1, $20F2 and $20F3 have the values 1, 2, 3 and 4.

a) MOVB %AL, %BL

b) MOVL 0x300, %EBX

c) MOVW %ECX, 0x30

d) MOVB 0x3400, %AL

e) MOVW %AX, %AL

2.

Practice Problem 3.1 Assume the following values are stored at the indicated memory addresses and registers Address Value 0x100 0x104 0x108 0x10C OxFF OxAB 0x13 0x11 Register %eax %ecx %edx Value 0x100 0x1 0x3 Fill in the following table showing the values for the indicated operands: Value Operand %eax 0x104 $0x108