diff options
Diffstat (limited to 'arm')
-rw-r--r-- | arm/Op.v | 26 |
1 files changed, 26 insertions, 0 deletions
@@ -518,6 +518,32 @@ Proof with (try exact I; try reflexivity). unfold Val.select. destruct (eval_condition c vl m). apply Val.normalize_type. exact I. Qed. + +Definition is_trapping_op (op : operation) := + match op with + | Odiv | Odivu + | Oshrximm _ + | Ointoffloat | Ointuoffloat + | Ointofsingle | Ointuofsingle + | Ofloatofint | Ofloatofintu + | Osingleofint | Osingleofintu => true + | _ => false + end. + + +Lemma is_trapping_op_sound: + forall op vl sp m, + op <> Omove -> + is_trapping_op op = false -> + (List.length vl) = (List.length (fst (type_of_operation op))) -> + eval_operation genv sp op vl m <> None. +Proof. + destruct op; intros; simpl in *; try congruence. + all: try (destruct vl as [ | vh1 vl1]; try discriminate). + all: try (destruct vl1 as [ | vh2 vl2]; try discriminate). + all: try (destruct vl2 as [ | vh3 vl3]; try discriminate). + all: try (destruct vl3 as [ | vh4 vl4]; try discriminate). +Qed. End SOUNDNESS. (** * Manipulating and transforming operations *) |