Question

Write a MIPS assembly language program to solve the following problem: For a set of integers stored in an array, calculate the sum of the even numbers and the sum of the odd numbers. The program should store these numbers in memory variables: evenSum and oddSum. Numbers should be read from the array one at a time with a zero value (0) being used to signal the end of data in the array.

Answer 1

The code will find the even / odd sum and store it in variables. You can see the screenshot of data segment that the sums are 0 initially and after code execution, the first 2 values in the data segment show the even sum and odd sum respectively.

.data
   evenSum: .word 0
   oddSum: .word 0
   array: .word 20 11 4 8 7 5 3 9 1 2 0

.text

   la $t0, array #get array address into t0
   li $t1, 0 #even sum
   li $t2, 0 #odd sum
   li $t4, 2 #constant 2
Loop:
   lw $t3, 0($t0) #get current int into t1
   beqz $t3, EndLoop
  
  
   div $t3, $t4 #divide by 2
   mfhi $t5 #get the remainder of division
   beqz $t5, Even
Odd:
   add $t2, $t2, $t3
   b Next
Even:
   add $t1, $t1, $t3
Next:
   add $t0, $t0, 4
   b Loop

EndLoop:
   #store the answers in variables
   sw $t1, evenSum
   sw $t2, oddSum
  
   #exit
   li $v0, 10
   syscall
  
  
  

output
-----

Before executing code (after assembling)

After executing code