NAME

msb64 - return the position of the most significant bit set

SYNOPSIS

#include <limb/uint64.h>

int msb64(u64 val)

DESCRIPTION

The msb64() function returns the position of the last (most significant) bit set in val.

The least significant bit is position 1 and the most significant bit is position 64.

RETURN VALUE

msb64() returns the position of the most significant bit set (from 1 to 64), or 0 if no bits are set (i.e. val is zero).