Section Double_round_plus_beta_ge_3_FLX.
Variable prec : Z.
Variable prec' : Z.
Context { prec_gt_0_ : Prec_gt_0 prec }.
Context { prec_gt_0_' : Prec_gt_0 prec' }.

Theorem double_round_plus_beta_ge_3_FLX :
(3 <= beta)%Z ->
forall choice1 choice2,
(2 * prec <= prec')%Z ->
forall x y,
FLX_format beta prec x -> FLX_format beta prec y ->
double_round_eq (FLX_exp prec) (FLX_exp prec') choice1 choice2 (x + y).