bitops.h

[Ronald G Minnich]

Here's what is there now.


static inline unsigned long log2(unsigned long x)
{
        unsigned long r = 0;
        __asm__(
                "bsrl %1, %0\n\t"
                "jnz 1f\n\t"
                "movl $-1, %0\n\t"
                "1:\n\t"
                : "=r" (r) : "g" (x));
        return r;

}

Unless there are objections I'd like to put this in C code because:
- I'm getting assembly errors
- It's non-portable code
- I don't think we need the potential performance boost that much.

Comments?

ron