asm bsf statement

has anybody here used the assembly statement bsf?

I am looking at optimizing my gravity and collision detection code, and I was thinking of using bsf to loop through my variables and find the first set bit.

but then I tried using bsf in just a little sample piece of code and I could not get it to work using inline assembler. Has anybody in here used it before? I would like to see its usage in inline asm...

No, but you may need to state the compiler you're using as they all seem to handle inline asm slightly differently. This works on MSVC -

Code:

---

#include <iostream>

using namespace std;

int main()
{
        int a = 4,b=0;
        _asm {

                bsf eax,a
                mov b,eax
        }

        cout << b;
        return 0;

}

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