Question

Write a MIPS program with two variables in the .data segment - x and y. The program should load x into a register. It should then isolate the last twelve bits of x (the twelve bits furthest to the right). It should finally store the resulting value in the variable y. So, for example, if x contains 1111 0000 1111 0000 1111 0011 1100 1010, your program should store the value 0000 0000 0000 0000 0000 0011 1100 1010 in the variable y.

Please type your answer in the text box below. Don't worry about formatting (spacing, tabs, etc.). Just do your best to make the code as readable as possible.

Answer 1

PROGRAM:

.data
x: .word 0xF0F0F3CA
y: .space 4
prompt: .asciiz "Values of x and y after isolating:\nx = "
prompt1: .asciiz "\ny = "
.text
.globl main
main:
lw $t0,x # Load the value of x into $t0
and $t0,$t0,0x00000FFF # Extract the last 12 bits of x
sw $t0,y # Store the above result in y

li $v0,4 # 4 is the print string syscall
la $a0,prompt # Load the address of the string to be printed
syscall # Print the string

li $v0,35 # 35 is the print integer in binary syscall
lw $a0,x # Load the value to be printed
syscall # Print the integer in binary

li $v0,4 # 4 is the print string syscall
la $a0,prompt1 # Load the address of the string to be printed
syscall # Print the string

li $v0,35 # 35 is the print integer in binary syscall
lw $a0,y # Load the value to be printed
syscall # Print the integer in binary

li $v0,10 # 10 is the exit program syscall
syscall # Exit the program

Please refer to the following screenshot of the program for indentation of the code:

OUTPUT: