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| author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2019-05-13 14:02:23 +0200 |
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| committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2019-05-13 14:02:23 +0200 |
| commit | 5e53b6e6447b22eb34e5be1bc45320ca4e3d82a1 (patch) | |
| tree | 46cd387020eb3af3c65d8bd8d0b73af3e47feaaf /mppa_k1c/SelectOpproof.v | |
| parent | c1b36f701c8c3968bb5fad86c94dd5ccfa81e3e5 (diff) | |
| download | compcert-kvx-5e53b6e6447b22eb34e5be1bc45320ca4e3d82a1.tar.gz compcert-kvx-5e53b6e6447b22eb34e5be1bc45320ca4e3d82a1.zip | |
we directly call 64-bit unsigned division
Diffstat (limited to 'mppa_k1c/SelectOpproof.v')
| -rw-r--r-- | mppa_k1c/SelectOpproof.v | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/mppa_k1c/SelectOpproof.v b/mppa_k1c/SelectOpproof.v index 9e2eec8b..2730ee91 100644 --- a/mppa_k1c/SelectOpproof.v +++ b/mppa_k1c/SelectOpproof.v @@ -872,8 +872,24 @@ Theorem eval_divu_base: Val.divu x y = Some z -> exists v, eval_expr ge sp e m le (divu_base a b) v /\ Val.lessdef z v. Proof. - intros; unfold divu_base. - econstructor; split. eapply eval_helper_2; eauto. DeclHelper. UseHelper. auto. + intros until z. + intros Hax Hby Hdiv. unfold divu_base. + pose proof (divu_is_divlu x y) as DIVU. + destruct (Val.divlu (Val.longofintu x) (Val.longofintu y)) + as [ ql | ] eqn:Ediv. + { TrivialExists. + { econstructor. eapply eval_helper_2; eauto. + { econstructor. econstructor. eassumption. + constructor. simpl. reflexivity. } + { econstructor. econstructor. eassumption. + constructor. simpl. reflexivity. } + { DeclHelper. } + { UseHelper. } + constructor. } + simpl. + congruence. + } + congruence. Qed. Theorem eval_modu_base: |