Mips to Machine Code, and Machine Code to Mips (Procedures will be preferred!) M

Question

Mips to Machine Code, and Machine Code to Mips

(Procedures will be preferred!)

MACHINE CODE MIPS Convert each of the following 32-bit machine code instructions into a MIPS instruction. Formatting: use register names in your final answer, e.g. $to instead of $8 For all questions, you can assume PC+4 = 0x0040004 and we have the following labels: func1: 0x0040000c func2: 0x00400014 func3: 0x0040002c problem (1 point possible) 0xA2 6 8000A. (Recall PC+4 Ox0040004, func 1 : 0x0040000c, func2: 0x0 0 4 0 0 0 14 , func3: 0x0040002c) sb $t0 0x000A $s3 CHECK problem (1 point possible) 0x00851026 (Recall PC+4 0x0 040004, func1: 0x0040000c, func2: 0x00400014, func 3 : 0x0040002c) 2 CHECK problem (1 point possible) 0x0C100005 (Recall PC+4 0x0 040004, func1: 0x0040000c, func2: 0x00400014, func 3 : 0x0040002c) 2 CHECK problem (1 point possible) 0x00008A03 (Recall PC+4 0x0 040004, func1: 0x0040000c, func2: 0:00400014, func 3 : 0x0040002c) 2 CHECK

Explanation / Answer

1)

0xA268000A

in binary => 10100010011010000000000000001010

101000 10011 01000 0000000000001010

opcode(101000) = SB

register(10011) => $s3

register(01000) => $t0

0000000000001010 = 0x000A

Answer: sb $t0, 0x000A($s3)

2)

0X00851026

in binary => 00000000100001010001000000100110

000000 00100 00101 00010 00000 100110

first 6 bits are special bits in this case

opcode(100110) = xor

register(00100) = $a0

register(00101) = $a1

register(00010) = $v0

Answer: xor $v0, $a0, $a1

3)

0x0C100005

binary => 00001100000100000000000000000101

000011 00000100000000000000000101

opcode(000011) = jal

target adress = 00000100000000000000000101

Answer: jal 0x0100005

4)

0x00008A03

binary => 00000000000000001000101000000011

first 6 bits are special bits in this case

opcode(000011) = sra

register(00000) = $zero

register(10001) = $s1

01000 = 8

Answer: sra $s1, $zero, 8

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