diff options
-rw-r--r-- | powerpc/SelectOpproof.v | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/powerpc/SelectOpproof.v b/powerpc/SelectOpproof.v index b6412c08..1aa889bb 100644 --- a/powerpc/SelectOpproof.v +++ b/powerpc/SelectOpproof.v @@ -490,7 +490,9 @@ Proof. intros; red; intros until x. unfold xorimm. predSpec Int.eq Int.eq_spec n Int.zero. intros. subst. exists x; split; auto. destruct x; simpl; auto. rewrite Int.xor_zero; auto. - clear H. destruct (xorimm_match a); intros; InvEval. + predSpec Int.eq Int.eq_spec n Int.mone. + intros. subst. rewrite <- Val.not_xor. apply eval_notint; auto. + clear H H0. destruct (xorimm_match a); intros; InvEval. TrivialExists. simpl. rewrite Int.xor_commut; auto. subst. rewrite Val.xor_assoc. simpl. rewrite Int.xor_commut. TrivialExists. subst x. TrivialExists. simpl. rewrite Val.not_xor. rewrite Val.xor_assoc. |