08 Procedures 2

.data

.text
main:
addi $a0, $zero, 2
addi $a1, $zero, 0

jal power

display:
add $a0, $zero, $v0
addi $v0, $zero, 1
syscall

exit:
addi $v0, $zero, 10
syscall

power:
    beq $a1, 0, zero_case

  addi $sp, $sp, -8
    sw $ra, 4($sp)
    sw $a0, 0($sp)

    beq $a1, 1, one_case

    mult $v0, $a0
    mflo $v0
    jr $ra

    addi $a1, $a1, -1
    jal power

    zero_case:
        addi $v0, $zero, 1
        jr $ra

    one_case:
        lw $ra, 4($sp)
        lw $v0, 0($sp)
        addi $sp, $sp, 8

        add $v0, $zero, $a0
        jr $ra