diff options
Diffstat (limited to 'backend/PPCgenproof.v')
| -rw-r--r-- | backend/PPCgenproof.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/backend/PPCgenproof.v b/backend/PPCgenproof.v index fd5843b1..6db8b477 100644 --- a/backend/PPCgenproof.v +++ b/backend/PPCgenproof.v @@ -567,14 +567,14 @@ Qed. Lemma loadv_8_signed_unsigned: forall m a, Mem.loadv Mint8signed m a = - option_map Val.cast8signed (Mem.loadv Mint8unsigned m a). + option_map (Val.sign_ext 8) (Mem.loadv Mint8unsigned m a). Proof. intros. unfold Mem.loadv. destruct a; try reflexivity. unfold load. rewrite (in_bounds_equiv Mint8signed Mint8unsigned). destruct (in_bounds m Mint8unsigned b (Int.signed i)); auto. simpl. destruct (getN 0 (Int.signed i) (contents (blocks m b))); auto. - simpl. rewrite Int.cast8_signed_unsigned. auto. + simpl. rewrite Int.sign_ext_zero_ext. auto. compute; auto. auto. Qed. |