# This MIPS program adds 2 numbers input 
# Filename : add.s
# start xspim/spim/qtspim
# load mips file
# run
#input data

        .data
        .align 2
        

Input:  .asciiz "\nEnter two integers \n"
Output: .asciiz "\n\nExp(firstNum, SecondNum) "

        .text
        .globl main
main:
        li $v0,4              # System call code for print string
        la $a0,Input          # Argument string as Input
        syscall              # Print the string

        li $v0,5              # System call code to read int input
        syscall              # Read it
        move $a0,$v0          # move the num entered into $s0

	li $v0,5              # System call code to read int input
        syscall              # Read it
        move $a1,$v0          # move the num entered into $s1
    
        jal exponent
        move $s3,$v0
        
        li $v0,4
        la $a0,Output
        syscall

        li $v0,1              # system call code for print int
        move $a0,$s3
        syscall

Exit:   li $v0,10             # System call code for exit
        syscall              # exit


          .text 
          .globl exponent
exponent: 
          move $s0,$a0
          move $s1,$a1

	 addi  $s3,1
iterate: bgt $s1,$0, multiply
 

         b  return   
         nop
         
multiply: mul $s3,$s3,$s0
          addi $s1,-1
          b iterate
          nop

return:  move $v0,$s3
         jr   $ra