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| author | Xavier Leroy <xavier.leroy@inria.fr> | 2019-04-15 17:50:30 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2019-05-20 18:00:46 +0200 |
| commit | 49342474c19558709c8cea6d70eaba9a4dd7a150 (patch) | |
| tree | 86fb6e9fc2081a71a2d770811164bb2f72b867e6 /arm/SelectOpproof.v | |
| parent | 996f2e071baaf52105714283d141af2eac8ffbfb (diff) | |
| download | compcert-kvx-49342474c19558709c8cea6d70eaba9a4dd7a150.tar.gz compcert-kvx-49342474c19558709c8cea6d70eaba9a4dd7a150.zip | |
Implement a `Osel` operation for ARM
The operation comples down to conditional moves.
Both integer and floating-point conditional moves are supported.
Diffstat (limited to 'arm/SelectOpproof.v')
| -rw-r--r-- | arm/SelectOpproof.v | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arm/SelectOpproof.v b/arm/SelectOpproof.v index d4aac9b6..f281f7ce 100644 --- a/arm/SelectOpproof.v +++ b/arm/SelectOpproof.v @@ -735,6 +735,20 @@ Proof. intros; red; intros. unfold compfs. TrivialExists. Qed. +Theorem eval_select: + forall le ty cond al vl a1 v1 a2 v2 a b, + select ty cond al a1 a2 = Some a -> + eval_exprlist ge sp e m le al vl -> + eval_expr ge sp e m le a1 v1 -> + eval_expr ge sp e m le a2 v2 -> + eval_condition cond vl m = Some b -> + exists v, + eval_expr ge sp e m le a v + /\ Val.lessdef (Val.select (Some b) v1 v2 ty) v. +Proof. + unfold select; intros; inv H. rewrite <- H3; TrivialExists. +Qed. + Theorem eval_cast8signed: unary_constructor_sound cast8signed (Val.sign_ext 8). Proof. red; intros until x. unfold cast8signed; case (cast8signed_match a); intros. |