assembly instructions MIPS language

1) Look at code provided in ALU2015.asm. Write down what it does.

2) What is the result and where is the result stored? Explain how it gets there.

3) Why are they using the ori instruction?

4) Why a complement operation is used in this code?

-----ALU2015.asm____Code------

# test program

.text

main:

ori $s7,$0,4097 # put a memory location in $s7

sll $s7,$s7,16 #

ori $s0,$0,0x2 # put 2 into $s0

and $s0,$s0,$zero # clear $s0

ori $s0,$zero,0x2 # put 2 back into $s0

nor $s0,$s0, $zero # complement $s0

ori $s0,$zero,0x2 # put 2 back into $s0

ori $s1,$0,0x3 # put 3 into $s1

add $s2,$s0,$s1 # add

beq $s2,$zero, exit

sw $s2, 4($s7) # store the result to memory

j exit

ori $s0,$zero,0x2 # pretend like we might do

nor $s0,$s0, $zero # other work after jump

# exit gracefully

exit: addi $v0,$0,10 # load exit

syscall # exit

## end of file