Question

In MIPS Assembly Language in Mars, define a method 1 to check if a number is divisible by 4. Then, define a method 2 to generate a random number, call method 1, and return result(number, yes/no) to main. Lastly, have the main method call method 2, and display the results.

Answer 1

.data
y: .asciiz"\nyes"
n: .asciiz"\nno"
.text
.globl main

main:   # call method2 and print number, yes/no
   jal method2
   move $a0, $v0
   li $v0, 1
   syscall
   beqz $v1, if
   li $v0, 4
   la $a0, n
   syscall
   j end
  
if:   # to print yes
   li $v0, 4
   la $a0, y
   syscall
   j end
  
method1: # to check if number is divisible by 4
   li $t1, 4
   div $a0, $t1
   mfhi $v1
   jr $ra
  
method2: # generate random number and call method 1
   li $v0, 42 # 42 is system call code to generate random int
   li $a1, 100 # $a1 is where you set the upper bound
   syscall     # your generated number will be at $a0
   move $v0, $a0
   move $v0, $a0
   sw $ra, ($sp)
   jal method1
   lw $ra, ($sp)
   jr $ra
  
end:
   li $v0, 10
   syscall

#code snippet

#Output