clzl              209 opal/mca/hwloc/hwloc201/hwloc/include/private/misc.h extern int clzl(long) __hwloc_attribute_const;
clzl              212 opal/mca/hwloc/hwloc201/hwloc/include/private/misc.h #  define hwloc_flsl(x) (x ? (8*sizeof(long) - clzl(x)) : 0)