hmm assembly program that raises one user input to the power of the next user input

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assembler

I am trying to write a program that takes two non-negative numbers from the user and raises the first input to the power of the second input. I am struggling a bit with this problem...but I have worked out some, unfinished code:

Power = """
00 read r1         #get n
01 read r2         #get m
02 copy r3, r1     #store old value of n
03 mul r6, r1, r1  #multiply n but itself and store new value
04 setn r4, 1      #set r4 = 1 
05 sub r5, r2, r4  #subtract 1 from m
06 jgtzn r4, 4     #if r4 > 0, then jump to line 4
07 write r6
08 halt
"""
hmmmAssembler.main(Power)

This is as far as I have gotten...Do you have any advice that may actually make this work?