MIPS ASSEMBLY

Write a function digit$\_$sum which accepts a single positive integer argument stored in $a$0$ and computes the sum of the digits of that argument recursively.

For example, the sum of the digits of $1972=1+9+7+2=19$

Your implementation must be recursive. An iterative solution will earn no credit for this problem.

Hint: Extracting the right$-$most digit of an integer can be accomplished by dividing the integer by $10.$ The quotient is the original integer with the right$-$most digit removed, while the remainder is the removed digit.

Use ONLY the following commands:

addi

syscall

add

La

slti

beq

bne

jal

Lw

mflo

mfhi

div

jr

sw

j