u8vector_sub     3703 ext/uvector/uvector.c     u8vector_sub("u8vector-sub", d, SCM_OBJ(s0), s1, clamp);
u8vector_sub     3709 ext/uvector/uvector.c     u8vector_sub("u8vector-sub!", SCM_OBJ(s0), SCM_OBJ(s0), s1, clamp);