1. NAME▲

fls64 - find last set bit in a 64-bit word

2. SYNOPSIS ▲

int fls64(__u64  x );

3. ARGUMENTS ▲

x
    the word to search

4. DESCRIPTION ▲

This is defined in a similar way as the libc and compiler builtin ffsll, but returns the position of the most significant set bit.

fls64(value) returns 0 if value is 0 or the position of the last set bit if value is nonzero. The last (most significant) bit is at position 64.

5. COPYRIGHT ▲