NODE_RADIX
radix /= NODE_RADIX;
uint32 next_skip = skip / NODE_RADIX;
radix *= NODE_RADIX;
skip = (skip + 1) * NODE_RADIX;
uint32 next_skip = skip / NODE_RADIX;
radix /= NODE_RADIX;
uint32 next_skip = skip / NODE_RADIX;
radix /= NODE_RADIX;