leaf1.asm - simple procedure, no stack

.data

.text

.globl main
main:

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


    jal leaf1
    nop
    j exit

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


exit: