diff options
| author |  xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2012-02-24 16:43:38 +0000 |
|---|---|---|
| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2012-02-24 16:43:38 +0000 |
| commit | 62316a8e94d8cdcbf9e7aeadd1caf8e29507e6b0 (patch) | |
| tree | 39b77b415e5387e8df643e18a206b7f1ffdaf329 /arm | |
| parent | 91dcfe11ff321386f7924da053be83523073a50c (diff) | |
Take advantage of Cmaskzero and Cmasknotzero.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1825 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'arm')
| -rw-r--r-- | arm/SelectOp.vp | 2 | ||||
| -rw-r--r-- | arm/SelectOpproof.v | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arm/SelectOp.vp b/arm/SelectOp.vp index 7b8851c..27b5f53 100644 --- a/arm/SelectOp.vp +++ b/arm/SelectOp.vp @@ -454,4 +454,4 @@ Nondetfunction addressing (chunk: memory_chunk) (e: expr) := | _ => (Aindexed Int.zero, e:::Enil) end. - +Definition cond_of_expr (e: expr) := (Ccompuimm Cne Int.zero, e:::Enil). diff --git a/arm/SelectOpproof.v b/arm/SelectOpproof.v index 0a5ee64..1a2f560 100644 --- a/arm/SelectOpproof.v +++ b/arm/SelectOpproof.v @@ -769,4 +769,19 @@ Proof. exists (v :: nil); split. eauto with evalexpr. subst. simpl. rewrite Int.add_zero; auto. Qed. +Theorem eval_cond_of_expr: + forall le a v b, + eval_expr ge sp e m le a v -> + Val.bool_of_val v b -> + match cond_of_expr a with (cond, args) => + exists vl, + eval_exprlist ge sp e m le args vl /\ + eval_condition cond vl m = Some b + end. +Proof. + intros. unfold cond_of_expr; simpl. + exists (v :: nil); split; auto with evalexpr. + simpl. inversion H0; simpl. rewrite Int.eq_false; auto. auto. auto. +Qed. + End CMCONSTR. |