Question

Create a SPIM program that asks the user for a character string and a number. Repeatedly display the string on the console for the number of times specified by the user.

Format your assembly program to make it easier to read by including appropriate comments and formatting using appropriate white space. When ending your program call system call code 10.

Example Output:

Please enter a string: I will not repeat myself

Please enter the integer number of times to repeat: 5

I will not repeat myself
I will not repeat myself
I will not repeat myself
I will not repeat myself

Answer 1

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Screenshot of the SPIM code:-

Screenshot of Output:-

SPIM code to copy:-

.data
buffer: .space 50
str: .asciiz "Please enter a string:"
prompt:   .asciiz "Please enter the integer number of times to repeat: "
  

.text

main:
  
la $a0, str # Prompt for inputting string
li $v0, 4
syscall

li $v0, 8 # load the string input

la $a0, buffer # load byte space into address
li $a1, 50 # allot the byte space for string

move $t0, $a0   
syscall
  
# initialize
li   $s0, 10
  
   # prompt for integer input
li   $v0, 4
la   $a0, prompt
syscall

   # read in the integer value
li   $v0, 5
syscall
move $s0, $v0

loop:  
   # print str
   la $a0, buffer
   move $a0, $t0   
   li $v0, 4 # print string
   syscall

   # decrement loop counter and branch if positive and non-zero
   sub   $s0, $s0, 1
   bne    $zero,$s0, loop

   li $v0, 10 # end program with system code 10
   syscall