addi $t0, $zero, 4
addi $t2, $t2, 0x5678
addi $t3, $zero, 0
addi $t1, $zero, 0
loop: lw $t4, ($t2)
add $t1, $t1, $t4
addi $t2, $t2, 4
addi $t3, $t3, 1
bne $t3, $t0, loop