Untitled

Write a program allowing user input all elements of 2D array M[3][3] and print sum of (M[0][0]+ M[1][1]+ M[2][2])
.data
prompt_row1_col1: .asciiz "Enter the value of A[0][0]: "
prompt_row1_col2: .asciiz "Enter the value of A[0][1]: "
prompt_row1_col3: .asciiz "Enter the value of A[0][2]: "
prompt_row2_col1: .asciiz "Enter the value of A[1][0]: "
prompt_row2_col2: .asciiz "Enter the value of A[1][1]: "
prompt_row2_col3: .asciiz "Enter the value of A[1][2]: "
prompt_row3_col1: .asciiz "Enter the value of A[2][0]: "
prompt_row3_col2: .asciiz "Enter the value of A[2][1]: "
prompt_row3_col3: .asciiz "Enter the value of A[2][2]: "
M: .space 36
size: .word 3
.text
.globl main
main:
		la $t0, M # load array M
		
		li $v0, 4
		la $a0, prompt_row1_col1
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 0($t0)
		
		li $v0, 4
		la $a0, prompt_row1_col2
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 4($t0)
		
		li $v0, 4
		la $a0, prompt_row1_col3
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 8($t0)
		
		li $v0, 4
		la $a0, prompt_row2_col1
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 12($t0)
		
		li $v0, 4
		la $a0, prompt_row2_col2
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 16($t0)
		
		li $v0, 4
		la $a0, prompt_row2_col3
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 20($t0)
		
		li $v0, 4
		la $a0, prompt_row3_col1
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 24($t0)
		
		li $v0, 4
		la $a0, prompt_row3_col2
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 28($t0)
		
		li $v0, 4
		la $a0, prompt_row3_col3
		syscall
		
		li $v0, 5
		syscall
		sw $v0, 32($t0)
		
		jal sumDiagonal
		move $a0, $v0 # v0 has the sum
		li $v0, 1
		syscall
		
		# End program
		li $v0, 10
		syscall
sumDiagonal:
		li $v0, 0 # sum = 0
		lw $t1, size
		li $t4, 0 # index = 0
			sumLoop:
				mul $t2, $t4, $t1 # t2 = rowIndex * colSize
				add $t2, $t2, $t4 # 			            + colIndex
				mul $t2, $t2, 4  #               						* dataSize
				add $t2, $t2, $t0 # 												+ baseAddress
				
				lw $t3, ($t2)
				add $v0, $v0, $t3 # sum = sum + mdArray[i][i]
				
				addi $t4, $t4, 1
				blt $t4, $t1, sumLoop # if i < size
			jr $ra