Question

Using MARS write a MIPS assembly language program to prompt the user to input two 32-bit integers X and Y (X and Y can be prompted separately or at the same time), get them from the user then store them in memory locations labeled X and Y respectively. The program then loads X and Y from the main memory to registers, calculates the sum of them (i.e. X + Y) and store the sum into a memory location labeled S. The program then prints out the result (i.e. integer S) after printing the string "The sum of X and Y (X + Y) is ".

Then assemble and run the program with MARS to show and capture the input/output.

Instruction:

1. A copy of the final working assembly language source code with comments and documentation. The file should be "text-only" and the extension must be ".s" or ".asm".

2. A screenshot showing keyboard input and displayed output from the console.

Answer 1

Given below is the code and output for the question. Please do rate the answer if it helped. Thank you.

.data
   xMsg: .asciiz "Enter the values for X: "
   yMsg: .asciiz "Enter the values for Y: "
   outMsg: .asciiz "The sum of X and Y (X + Y) is "
   X: .word 0
   Y: .word 0
   S: .word 0
  
.text
   #print string
   la $a0, xMsg
   li $v0, 4
   syscall
  
   #read int and store in X
   li $v0, 5
   syscall
   sw $v0, X

   #print string
   la $a0, yMsg
   li $v0, 4
   syscall
  
   #read int and store in Y
   li $v0, 5
   syscall
   sw $v0, Y

   #load X into $t0, and Y into $t1, calculate sum into $t0 and save to S
   lw $t0, X
   lw $t1, Y
   add $t0, $t0, $t1
   sw $t0, S
  
   #display the result - msg and then number from S
   la $a0, outMsg
   li $v0, 4
   syscall
  
   #print number from S
   lw $a0, S
   li $v0, 1
   syscall

   #exit
   li $v0, 10
   syscall

output
----
Enter the values for X: 2
Enter the values for Y: 3
The sum of X and Y (X + Y) is 5
-- program is finished running --