Question

In: Computer Science

Convert the following MIPS instructions into machine code. Directly write down the answer without justifying steps...

  1. Convert the following MIPS instructions into machine code. Directly write down the answer without justifying steps will result 0 credit. All steps must be typed in Word.
    1. add $s0, $s1, $s2
    1. 2. lw $s0, 15($s1)

3. beq $s0, $s1, LABEL   #consider LABEL represents the 16-bit value 0x00FF

Solutions

Expert Solution

Solution :

MIPS to machine code :

a) add $s0, $s1, $s2 :
For add instruction, Initial special bits are : 000000
The register $s1 can be written as : 10001
The register $s2 can be written as : 10010
The register $s0 can be written as : 10000
The OPCODE for ADD is : 00000 100000
Hence the instruction in binary can be written as : 00000010001100101000000000100000
The instruction in hex can be written as : 0x02328020


b) lw $s0, 15($s1) :
The load word instruction has opcode of : 100011
The register $s1 can be written as : 10001
The register $s0 can be written as : 10000
The offset here is 0x15 : 0000000000010101
So the instruction in binary can be written as : 10001110001100000000000000010101
The instruction in hexadecimal can be written as : 0x8E300015


c) beq $s0, $s1, LABEL :
The beq instruction has opcode as : 000100
The register $s0 can be written as : 10000
The register $s1 can be written as : 10001
The 16 bit offset here is : 0000000011111111
The instruction in binary can be written as : 00010010000100010000000011111111
The instruction in hexadecimal can be written as : 0x121100FF

If you have any doubts, then you can ask in comment section. Thank you.


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