u64vector_add    3395 ext/uvector/uvector.c     u64vector_add("u64vector-add", d, SCM_OBJ(s0), s1, clamp);
u64vector_add    3401 ext/uvector/uvector.c     u64vector_add("u64vector-add!", SCM_OBJ(s0), SCM_OBJ(s0), s1, clamp);