Use ripes.me programming website to fix this code and also provide a screenshot in ripes to show it's working correctly. I will attach instructions below.

For computing $2^3$ you should define a function pow$($a$,$ b$)$ that implements the following recursive algorithm.

pow$($a$,$ b$)\{$

if $($b $==0)\{$

return $1\}$

if $($a $==0)\{$

return $0$

$\}$

ans $=$ a $*$ pow$($a$,$ b$-1)$

return ans

$\}$

use the jal instruction to call your pow function. To pass arguments to the function you should use the a$0$ and a$1$ registers. To return the final answer, you should use the a$0$ register.

However, this function is recursive, which means the intermediate values a$0$ and a$1$ will be overwritten. To avoid this problem, use the function call stack by utilizing the stack pointer sp

Increment the stack pointer to make room for the values of a$0,$ a$1,$ and ra before calling pow$().$ Use the sw instruction to put the values of a$0,$ a$1,$ and ra into memory $$on the stack$$ based on where the sp is pointing.

Call pow$()$

When pow$()$ returns, move the value out of a$0$ into a different register $($recommended: any of the $$temporaries$).$ Then, use the lw instruction to retrieve the old values of a$0,$ a$1,$ and ra from $$the stack$($memory$)$ based on where sp is pointing. Finally, return sp to it$$s original position.

After doing all of this, you should have the value of pow$($a$,$ b$-1)$ after the recursive call has been finished in a temporary register $($e$.$g$.,$ t$2).$

This is my code:

$.$data

my$\_$str: $.$asciz "The program computes $2^3...$

$"$

a: $.$word $2$

b: $.$word $3$

$.$text

$.$globl $\_$main

$\_$main:

# Print initial string

la a$0,$ my$\_$str

li a$7,4$

ecall

# Load values of a and b into $2$ registers

lw a$0,$ a

lw a$1,$ b

addi sp$,$ sp$,-12$

sw ra$,0($sp$)$ # Save the return address

sw a$1,4($sp$)$ # Save the value of a$1$

sw a$0,8($sp$)$ # Save the value of a$0$

# Call pow$()$ function

jal pow

# Retrieve the result and restore stack

mv a$0,$ t$0$ # Move the result from t$0$ to a$0$

lw ra$,0($sp$)$ # Restore ra

lw a$1,4($sp$)$ # Restore a$1$

lw a$0,8($sp$)$ # Restore a$0$

addi sp$,$ sp$,12$ # Move the stack pointer back to its original position

# Print the result

li a$7,1$ # Service number for print integer

ecall

# Exit

li a$7,10$ # Service number for exit

ecall

pow:

# Function implementation

# a: a$0,$ b: a$1$

addi sp$,$ sp$,-4$ # Allocate space for the local variable $($ans$)$

sw ra$,0($sp$)$ # Save return address

sw a$1,4($sp$)$ # Save a$1$

li t$0,1$ # Initialize ans to $1$

beqz a$1,$ pow$\_$exit # If b $==0,$ return $1$

li t$1,1$ # Initialize t$1$ to $1$

beqz a$0,$ pow$\_$exit # If a $==0,$ return $0$

addi a$1,$ a$1,-1$ # Decrement b by $1$

jal pow # Recursive call

lw ra$,0($sp$)$ # Restore return address

lw a$1,4($sp$)$ # Restore a$1$

mv a$0,$ t$0$ # Move the result to a$0$ after recursive call

mul t$0,$ a$0,$ t$0$ # Calculate ans $=$ a $*$ pow$($a$,$ b$-1)$

pow$\_$exit:

addi sp$,$ sp$,4$ # Deallocate space for the local variable

jr ra