u32vector_sub    4011 ext/uvector/uvector.c     u32vector_sub("u32vector-sub", d, SCM_OBJ(s0), s1, clamp);
u32vector_sub    4017 ext/uvector/uvector.c     u32vector_sub("u32vector-sub!", SCM_OBJ(s0), SCM_OBJ(s0), s1, clamp);