Machine Language - Assembly Disassembly 1. Show the binary representation of the

Question

Machine Language - Assembly Disassembly

1.     Show the binary representation of the following instructions (5 points each)

a.     add $23, $16, $23

b.     sub $16, $16, $17

c.     lw $16, 4($29)

d.     sw $17, 16($29)

2.     Assemble the following MIPS Machine Instructions, Final answer should be in hexadecimal. Don’t worry about addresses (15 points):

add $23, $13, $14

add $24, $17, $23

addi $17, $17, 1

addi $13, $13, 1

ori $13, $13, $0

3.     Disassemble the following MIPS Machine Code. Registers can be left as numbers. Do not worry about numbers. (15 points)

0x3411000b

0x3c101001

0x2231ffff

0x01129020

0x2210fffc

Explanation / Answer

Hi, for this question it is necessary to know the following knowledge: The instruction codes representation, that is what add, ori instruction translates to, and basic binary to hex conversion.

1.

a) 00000010000101111011100000100000

add = 100000, $16 = s0 = 10000, $23 = s7 = 10111

b) 00000010000100011000000000100010

sub = 100010

c) 10001111101100000000000100000000

lw = 100011, sp = 11101,s0 = 10000, offset = 0000000100000000

d) 10101111101100010000000000000000

sw = 101011, sp = 11101, s1 = 10001, offset = 0000000000000000

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