CODEWITHSUNDEEP
assemblyexponentiation
tothemax
tothemax

Reputation: 115

Understanding control flow in Assembly

This function is not iterating properly. The result of it just squares the base regardless of the exponent. I have commented my thoughts on what I think is happening.

As an aside, is there an easy way I can debug assembly with breakpoints and stepping through? Potentially an IDE you recommend? Teach a man to fish they say...

Thank you for the help!

my_pow:
    movl $0, %eax
    movl %edi, %eax #result = base

    movl $2, %r9d #i = 2
    Loop:
        cmpl %r9d, %esi #if i <= exp
        mul %edi #multiply result*=base
        inc %r9d #i++
        jle Loop #if it was less than, do it again
    ret #if it was greater don't go to the label and return what is in %eax

Upvotes: 0

Views: 30

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