diff options
| author |  xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2014-07-23 08:54:56 +0000 |
|---|---|---|
| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2014-07-23 08:54:56 +0000 |
| commit | 2a0168fea37b68ad14e2cb60bf215111e49d4870 (patch) | |
| tree | 2f59373790d8ce3a5df66ef7a692271cf0666c6c /backend/SelectDivproof.v | |
| parent | 00805153cf9b88aa07cc6694b17d93f5ba2e7de8 (diff) | |
Merge of "newspilling" branch:
- Support single-precision floats as first-class values
- Introduce chunks Many32, Many64 and types Tany32, Tany64 to
support saving and restoring registers without knowing
the exact types (int/single/float) of their contents, just
their sizes.
- Memory model: generalize the opaque encoding of pointers to
apply to any value, not just pointers, if chunks Many32/Many64
are selected.
- More properties of FP arithmetic proved.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2537 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'backend/SelectDivproof.v')
| -rw-r--r-- | backend/SelectDivproof.v | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/backend/SelectDivproof.v b/backend/SelectDivproof.v index 9228cde..d4bd4f5 100644 --- a/backend/SelectDivproof.v +++ b/backend/SelectDivproof.v @@ -570,4 +570,20 @@ Proof. - TrivialExists. Qed. +Theorem eval_divfs: + forall le a b x y, + eval_expr ge sp e m le a x -> + eval_expr ge sp e m le b y -> + exists v, eval_expr ge sp e m le (divfs a b) v /\ Val.lessdef (Val.divfs x y) v. +Proof. + intros until y. unfold divfs. destruct (divfs_match b); intros. +- unfold divfsimm. destruct (Float32.exact_inverse n2) as [n2' | ] eqn:EINV. + + inv H0. inv H4. simpl in H6. inv H6. econstructor; split. + EvalOp. constructor. eauto. constructor. EvalOp. simpl; eauto. constructor. + simpl; eauto. + destruct x; simpl; auto. erewrite Float32.div_mul_inverse; eauto. + + TrivialExists. +- TrivialExists. +Qed. + End CMCONSTRS. |