Beginner-level Assembly: DO NOT USE ANY PSEUDO-INSTRUCTIONS -and- COMMENT EVERY

Question

Beginner-level Assembly: DO NOT USE ANY PSEUDO-INSTRUCTIONS -and- COMMENT EVERY LINE OF CODE YOU ADD

The purpose of the program is to read in a list of 10 integers and then print them out. There are 4 functions in the program;

2 of which you are to complete.

Main: This function will call getdata and print. Main is complete and should not be changed.

Getdata: This function reads 10 integers and stores them into memory. There is one parameter ($a0) which holds the address of where the list of numbers is to be stored. Getdata calls the function printstr to print the prompt. Getdata is complete and should not be changed.

Printstr: This function is to print a string. There is one parameter ($a0) which holds the address of the string to print. You are to complete this function so it performs as required. This function is called from the getdata function and the print function.

Print: This function is to print the list of integers. The integers must all be on the same line of output and be separated by a comma and space (already in the data segment). See the example input and output below. This function must call the printstr function to print the comma string. Remember that as this function calls another, it must save and restore the $ra.

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Specifics:

- Do not use pseudo-instructions

- Make sure that your print function calls the printstr function correctly and that the stack is used correctly.

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Documentation:

- Comment every instruction/line of code.

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Sample input and output. Note there is no comma after the last number.

Enter a number 1

Enter a number 2

Enter a number 9

Enter a number 11

Enter a number 99

Enter a number 12

Enter a number 24

Enter a number 90

Enter a number 17

Enter a number 82

1, 2, 9, 11, 99, 12, 24, 90, 7, 82

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Starting code is shown below

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# make sure to add a comment to every line you add

# do not use any pseudo-instructions

# do not change the Main or Getdata functions

.data
prompt: .asciiz "Enter a number " # address 0x10010000
comma: .asciiz ", " # address 0x10010010
.space 40   # set aside 40 bytes for 10 integers

.globl main
.text
main:
   lui $a0, 0x1001   # get start of data segment
   jal getdata   # call getdata function
  
   lui $a0, 0x1001   # get start of data segment
   ori $a0, $a0, 0x0014
   jal print   # call print function
  
   ori $v0, $0, 10 # set command to exit
   syscall       # end program
  
# printstr
# paramters: $a0 holds address of string to print
# purpose: print the string parameter

printstr:
#to be completed
   jr $ra
  
getdata:
   addi $sp, $sp, -4 # allocate space on stack
   sw $ra, 0($sp)   # save $ra
   lui $t1, 0x1001   #start of data
   ori $t1, $t1, 0x0014 # address of first input integer  
   ori $t0, $0, 10   # counter
top:   beq $t0, $0, ret # while not 0
  
   lui $a0, 0x1001
   ori $a0, $a0, 0x0000
   jal printstr   # call function to print prompt
   ori $a0, $a0, 0x0014 # $a0 now holds address of first integer
   ori $v0, $0, 5   # set command to read integer
   syscall       # read int
   sw $v0, 0($t1)   # save int in memory
   addi $t1, $t1, 4 # increment to next location
  
   addi $t0, $t0, -1 # decrement counter
   j top       # repeat
  
ret:   lw $ra, 0($sp)   # restore return address
   addi $sp, $sp, 4 # clean up stack
   jr $ra       # return from call
  
# print
# parameter: $a0 holds address of list in memory
# purpose: print the list separated by commas

print:  
   #to be completed
   jr $ra

Explanation / Answer

ScreenShot

------------------------------------------------------------------------

Code

#variable declaration
.data
prompt: .asciiz "Enter a number " # address 0x10010000
comma: .asciiz ", " # address 0x10010010
.space 40   # set aside 40 bytes for 10 integers
#main function
.globl main
.text
main:
   lui $a0, 0x1001   # get start of data segment
   jal getdata   # call getdata function

   lui $a0, 0x1001   # get start of data segment
   ori $a0, $a0, 0x0014
   jal print   # call print function

   ori $v0, $0, 10 # set command to exit
   syscall       # end program

# printstr
# paramters: $a0 holds address of string to print
# purpose: print the string parameter

printstr:
#system call for string display
addi $v0,$0,4
syscall
jr $ra
#get data into an array function
getdata:
   addi $sp, $sp, -4 # allocate space on stack
   sw $ra, 0($sp)   # save $ra
   lui $t1, 0x1001   #start of data
   ori $t1, $t1, 0x0014 # address of first input integer
   ori $t0, $0, 10   # counter
top:   beq $t0, $0, ret # while not 0

   lui $a0, 0x1001
   ori $a0, $a0, 0x0000
   jal printstr   # call function to print prompt
   ori $a0, $a0, 0x0014 # $a0 now holds address of first integer
   ori $v0, $0, 5   # set command to read integer
   syscall       # read int
   sw $v0, 0($t1)   # save int in memory
   addi $t1, $t1, 4 # increment to next location

   addi $t0, $t0, -1 # decrement counter
   j top       # repeat

ret:   lw $ra, 0($sp)   # restore return address
   addi $sp, $sp, 4 # clean up stack
   jr $ra       # return from call

# print
# parameter: $a0 holds address of list in memory
# purpose: print the list separated by commas

print:
   #move the starting address from a0 to t1
   add $t1,$0,$a0
   ori $t0, $0, 10   # counter
   #loop to print each data comma seperated
loop:
    beq $t0, $0, retprint # while not 0
    #get first data in a0
    lw $a0, 0($t1)
    #print system call
    addi $v0,$0,1
    syscall
    beq $t0, $2, retprint # avoid last comma
    #comma seperation address
    lui $a0, 0x1001   # get start of data segment
    ori $a0, $a0, 0x0010
    #print comma
    addi $v0,$0,4
    syscall
    addi $t1, $t1, 4 # increment to next location
    addi $t0, $t0, -1 # decrement counter
    j loop      # repeat
#return from print
retprint:
   jr $ra

--------------------------------------------------------------------

Output

Enter a number 1
Enter a number 2
Enter a number 9
Enter a number 11
Enter a number 99
Enter a number 12
Enter a number 24
Enter a number 90
Enter a number 7
Enter a number 82
1, 2, 9, 11, 99, 12, 24, 90, 7, 82
-- program is finished running --

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