Question

Assume that you have an array of 100 elements representing the grades students are stored in memory. Suppose the grades are in IEEE single precision format. Write a MIPS program to compute the average of the students grades and store the result in register $f0. Assume the array base address is stored in register $s0 and a floating point value of 100 is stored in memory with it address given in register $s2.

Answer 1

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.data
grade: .float 90.2,81.8,64,58.2,78.3,88.7,57.6,83,89.7,75,76.2,69.6,87.7,75.7,87,86.9,52.3,95.6,88.9,85.4,91.9,96.2,78.9,90.5,99.5,85.7,99.6,71.8,99.6,80.9,96.8,83.9,81.1,96.8,53.3,66.6,69.3,53.7,92.3,77.8,70.3,77.3,53.8,63.3,94.3,89.8,68,58.6,85.5,80.1,88.7,72.4,92.6,64.2,62.6,88.6,61.7,66,60.3,56.2,56.6,72.8,60.8,54.9,60.3,80.1,93.5,80.6,56.5,75.3,86,87.9,98.3,56.1,92.3,89.4,62.9,55,80.1,86.1,80.8,59.9,79.1,92.9,51.1,91.9,52.6,62.4,52.7,77,86.1,74.4,98.8,57.3,99.4,80.4,97.9,82,94.6,65.9
size: .float 100.0
msg4: .asciiz "\nAverage of grades is : "

.text
.globl main
main:
#address of size
la $s2,size

#save address of array
la $s0,grade

#load size of 100
li $t1,100

#set index i=0
li $t0,0

add_loop:
#if i==100 jump to exit
beq $t0,$t1,addLoopExit

#get index of i
mul $t2,$t0,4

#get address of array[i]
add $t2,$t2,$s0

#load value from the address
l.s $f2,($t2)

#store number to sum
add.s $f0,$f0,$f2

#index++
addi $t0,$t0,1

#jump to loop
j add_loop

#break of loop
addLoopExit:

#load 100
l.s $f12,($s2)

#get average
div.s $f12,$f0,$f12

li   $v0, 4
la   $a0, msg4
syscall

#print float
li $v0,2
syscall

output