u64vector_sub    4165 ext/uvector/uvector.c     u64vector_sub("u64vector-sub", d, SCM_OBJ(s0), s1, clamp);
u64vector_sub    4171 ext/uvector/uvector.c     u64vector_sub("u64vector-sub!", SCM_OBJ(s0), SCM_OBJ(s0), s1, clamp);