(** Divisions that can be turned into multiplication by an inverse. *)
Definition exact_inverse : float -> option float := Bexact_inverse 53 1024 __ __.

(* Specifications: *)
Theorem div_mul_inverse:
forall x y z, exact_inverse y = Some z -> div x y = mul x z.
Theorem div_mul_inverse:
forall x y z, exact_inverse y = Some z -> div x y = mul x z.