Write a simple loop program in MIPS/QtSpim that will examine each number in the

Question

Write a simple loop program in MIPS/QtSpim that will examine each number in the data declaration below and do the following: If the number is negative, it is printed out to the console using syscall 1. If it is positive, the 2’s compliment of the number is calculated and stored back in the same data location. Thus at the end of the program, ALL of the data will be negative. After you output a data word to the console, output a CR/LF so that each number is on a separate line.    (No manual calculation is needed).

Question 1 is the program

Question 2 is : List the numbers that are printed out (as address labels or Hex representation)

.data

num1: .word 0x76546162

num2: .word 0x33346a6b

num3: .word 0x96548b8d

num4: .word 0x20666a4b

num5: .word 0x92773445

num6: .word 0x343f787c

num7: .word 0x86578778

num8: .word 0x41456669

num9: .word 0x8072204f

num0: .word 0

Explanation / Answer

Hi,

Please find the code for MIPS PROGRAM below:-

CODE:-

========================================================================================

.data

num1: .word 0x76546162

num2: .word 0x33346a6b

num3: .word 0x96548b8d

num4: .word 0x20666a4b

num5: .word 0x92773445

num6: .word 0x343f787c

num7: .word 0x86578778

num8: .word 0x41456669

num9: .word 0x8072204f

num0: .word 0

.text

global _start

_start :

mov $t2 ,1                             #move 1 to t2

     loop:

             beq t2, 10,endloop    #check if end of list is reached

             move $t1 , (num)t2    #else move (num)t2 values to t1

             add $t2,t2,1                  #increment t2 by 1

             bgtz $t1 ,POSITIVE   #if t1 is positive jump to label POSITIVE

            move $a0 ,$t1             #ELSE move value of t1 to$ao

             li $vo ,1                       #load syscall print_int into $v0

             syscall                         # make the syscall.

            call Crlf

             POSITIVE:

                sub $t3,0,$t1       # take 2’s complement by subtracting from 0

                 move $a0 ,$t3 # move value of t3 to $ao

                 li $v0,1                 #load syscall print_int into $v0

                 syscall                  #load syscall print_int into $v0

                 call Crlf

                 b      loop             # and repeat the loop.

    endloop:

        li $vo,10 #After loop completes call exit

      syscall
end:

===================================================================================

Please let me know in case of any clarification.

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