Hint Resolve eqm_unsigned_repr_r: ints.

(* Specifications: *)
Lemma eqm_signed_unsigned:
forall x, eqm (signed x) (unsigned x).
Theorem unsigned_range:
forall i, 0 <= unsigned i < modulus.
Lemma eqm_signed_unsigned:
forall x, eqm (signed x) (unsigned x).
Theorem unsigned_range:
forall i, 0 <= unsigned i < modulus.