Simple Leaf function using jal and jr

# leaf1.asm
# Simple Leaf function using jal and jr
.data

.text
  nop
  nop
  nop

  li $a0, 9
  li $a1, 4
  li $a2, 1
  li $a3, 2

  jal leaf1
  nop
   j exit  # do NOT drop down to leaf1. Jump over it

leaf1:
  add $t0, $a0, $a1
  add $t1, $a2, $a3
  sub $v0, $t0, $t1
  jr $ra


exit: