CHASH_SUB
(CHASH_SUB(table, slot, first) <= CHASH_SUB(table, last, first))
CHASH_SUB(dst.table, src.slot, dst.slot);
iter->table->hits_steps += CHASH_SUB(iter->table, iter->slot, hash) + 1;
CHASH_SUB(iter->table, iter->slot, hash) + 1;