Pasted

#using .word or .byte define a 2-D matrix
#start assuming row-wise or column-wise and print .word
 #1 2 3 4 5 6 7 8 9 10 11 12
#as
#1 2 3 4 
#5 6 7 8 
#9 10 11 12
 .data
 array:	.byte 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 
   newline: 
	.asciiz "\n"
spacing_single:
	.asciiz " "
spacing_double:
	.asciiz "  "
 .globl main
.text
 main:
	#load all the arrays at once
	la $s0, array
 	#t0 is going to be our counter - when it hits 4, we newline
	li $t0, 0
  process:
	lb $a0, ($s0) #load the value of the pointer at the array
	li $v0, 1 #output the integer
	syscall #output the number inputted from the array
	j format
 process_2:
	addi $s0, $s0, 1 #advance to the next element in the array
	addi $t0, $t0, 1 #increment the newline counter
	addi $t1, $t1, 1 #increment our exit counter - when this hits 12, we should be done
	beq $t1, 12, exit #if we reach the end of the array, exit
	beq $t0, 4, new_line #when t0 is equal to 4, jump to the new_line label
	j process #if it isn't, go back to the process and redo it
 format:
	move $t2, $a0
	div $t3, $t2, 10 #if the number is smaller than 10 (aka a single-digit)
	beqz $t3, double_digit_spacing #if it's a single digit number, we need to put 2 spaces
	li $v0, 4 #if it isn't (a double-digit number) then we only need one space
	la $a0, spacing_single
	syscall
	move $a0, $t2
	j process_2
 double_digit_spacing:
	li $v0, 4
	la $a0, spacing_double
	syscall
	move $a0, $t2
	j process_2	
 new_line:
	li $v0, 4
	la $a0, newline
	syscall	#print a new line
	li $t0, 0 #reset our counter to 1 
	j process #go back to the process
  exit:
	#end the program
	li $v0, 10
	syscall