proposition: Theorem FIX_format_satisfies_any : satisfies_any FIX_format.
proof: Proof. refine (satisfies_any_eq _ _ _ (generic_format_satisfies_any beta FIX_exp)). intros x. split. apply FIX_format_generic. apply generic_format_FIX. Qed.
imports: Coq(ZArith Reals Lia) Zaux Raux Defs Round_pred Generic_fmt Ulp Round_NE