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CSCI231 Lab 2-Solved

Implement a ‘replace’​ program​ in MIPS assembly language that, given an array of integers Arr​, its ​length​, integers ​x and ​y​, replaces all ​x with ​y in ​Arr​. Then your program should print out all values of ​Arr​.  

 For example, if ​Arr = {21, ​20​, 51, 83, ​20​, ​20​}​, ​length = 6, ​x = ​20​, ​y = ​5 and ​index = 0, then after running your program the values of Arr​ MUST be Arr​ = {21, 5​ ,​ 51, 83, 5​ ​, ​5​}​ and the values MUST be printed out.  

In the program, we assume the variables (e..g, Arr, length, x, y​ ​ and index​             ​) should be declared and initialized manually in the ​.data​ section.  

 Output:  ​21 5 51 83 5 5   (​The first (i.e., before 21) or last (i.e., after the last 5) space can be negligible.​) 

NOTES​:  How to print Integers and Strings/space/newline using ‘syscall’  

.data 
x:   .word    5 

msg1: .asciiz "x=" nl: .asciiz "\n" 

space:                .asciiz " " 

.text 

main: 

# Register assignments 
# $s0 = x 

# Initialize registers 
 
# Print msg1 
# Reg $s0 = x 
li $v0, 4 la $a0, msg1 


# Print result (x) 
# print_string syscall code = 4 
                li          $v0,1
# print_int syscall code = 1 
                move   $a0, $s0
syscall 

# Print newline 
# Load integer to print in $a0 
                li          $v0,4

                la         $a0, nl 

syscall 

# Exit 
# print_string syscall code = 4 
                li          $v0,10

syscall 
# exit 
 

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