5. (50) In part 5 you must make an assembly program (start with Template-AddArra

Question

5. (50) In part 5 you must make an assembly program (start with Template-AddArray.s ) to add the contents of an Array and print out the total value and the current element you just read. E.g. “The current element is:” and “The total value of the array is: XX”. Name your new file Lastname-AddArray.s Make sure you comment your code so I (and more so you) understand what you are doing.

For printing each element, use the jal command to jump to a section of the code for printing (don’t worry about saving specific registers for the call – just use any current registers for the reading the appropriate values).

Your program should be similar to the following C-code:

i=0;

while (i<N)

            {

            sum = sum + A[i];

            i++;

            }

Construct the loop via slt and a conditional branch. Assume you only have 5 elements and that your array holds the following C-equivalent.

            int A[] = 1, 2, 3, 4, 5;

Explanation / Answer

.data
arr: .word 1, 2, 3, 4, 5

.text
.globl main
main:

   # Add the array elements
add $x, $zero, $zero
add $sum, $zero, $zero

la $z, arr

loop:
slti $t, $x, 5        #i<10
beq $t, $zero, EXIT

lw $A, ($z) #$A = arr[i]
addi    $z, $z, 4

add $sum, $sum, $A   #sum = sum + A[i]

addi    $x, $x, 1 #incrementing i as i++

j loop

print_result:
#moving sum to $a0
add $a0, $zero, $sum   

li $v0, 1
syscall

li $v0, 10
syscall

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