diff options
| author |  xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2008-07-31 12:44:18 +0000 |
|---|---|---|
| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2008-07-31 12:44:18 +0000 |
| commit | 4c8a550fae641115170e4fc9c1b1292834e0c6c0 (patch) | |
| tree | 2363194510dce61b3a6e3280601654c0c8646f9a /backend/Selectionproof.v | |
| parent | 99294ec7c8054b92536d14883599ff3bfe7745ee (diff) | |
Flag to turn on/off the recognition of fused multiply-add and multiply-sub
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@706 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'backend/Selectionproof.v')
| -rw-r--r-- | backend/Selectionproof.v | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/backend/Selectionproof.v b/backend/Selectionproof.v index bd4dd23..784823b 100644 --- a/backend/Selectionproof.v +++ b/backend/Selectionproof.v @@ -722,13 +722,13 @@ Theorem eval_addf: eval_expr ge sp e m le b (Vfloat y) -> eval_expr ge sp e m le (addf a b) (Vfloat (Float.add x y)). Proof. - intros until y; unfold addf; case (addf_match a b); intros; InvEval. + intros until y; unfold addf. + destruct (use_fused_mul tt). + case (addf_match a b); intros; InvEval. EvalOp. simpl. congruence. - econstructor. eauto. EvalOp. econstructor. eauto with evalexpr. - econstructor. eauto with evalexpr. econstructor. - econstructor. simpl. reflexivity. constructor. - simpl. subst y. rewrite Float.addf_commut. auto. + EvalOp. simpl. rewrite Float.addf_commut. congruence. EvalOp. + intros. EvalOp. Qed. Theorem eval_subf: @@ -737,9 +737,12 @@ Theorem eval_subf: eval_expr ge sp e m le b (Vfloat y) -> eval_expr ge sp e m le (subf a b) (Vfloat (Float.sub x y)). Proof. - intros until y; unfold subf; case (subf_match a b); intros. + intros until y; unfold subf. + destruct (use_fused_mul tt). + case (subf_match a b); intros. InvEval. EvalOp. simpl. congruence. EvalOp. + intros. EvalOp. Qed. Theorem eval_cast8signed: |