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| author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-01-14 23:07:49 +0100 |
|---|---|---|
| committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-01-14 23:07:49 +0100 |
| commit | b92d5a32c314eee0c68a70c33f1847545aabeb19 (patch) | |
| tree | e18ebcbdf377d5e3dbd7ffe1224539309baa7086 /riscV/Asmgenproof1.v | |
| parent | d7c9c729ba52ae926238ab97650104117e488c05 (diff) | |
| download | compcert-kvx-b92d5a32c314eee0c68a70c33f1847545aabeb19.tar.gz compcert-kvx-b92d5a32c314eee0c68a70c33f1847545aabeb19.zip | |
64-bit signed division by two code
Diffstat (limited to 'riscV/Asmgenproof1.v')
| -rw-r--r-- | riscV/Asmgenproof1.v | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/riscV/Asmgenproof1.v b/riscV/Asmgenproof1.v index 3a1b6d13..3eb503f2 100644 --- a/riscV/Asmgenproof1.v +++ b/riscV/Asmgenproof1.v @@ -1076,17 +1076,24 @@ Opaque Int.eq. intros (rs' & A & B & C). exists rs'; split; eauto. rewrite B; auto with asmgen. - (* shrxlimm *) - clear H. exploit Val.shrxl_shrl_2; eauto. intros E; subst v; clear EV. + clear H. exploit Val.shrxl_shrl_3; eauto. intros E; subst v; clear EV. destruct (Int.eq n Int.zero). + econstructor; split. apply exec_straight_one. simpl; eauto. auto. split; intros; Simpl. -+ change (Int.repr 64) with Int64.iwordsize'. set (n' := Int.sub Int64.iwordsize' n). - econstructor; split. - eapply exec_straight_step. simpl; reflexivity. auto. - eapply exec_straight_step. simpl; reflexivity. auto. - eapply exec_straight_step. simpl; reflexivity. auto. - apply exec_straight_one. simpl; reflexivity. auto. - split; intros; Simpl. ++ destruct (Int.eq n Int.one). + * econstructor; split. + eapply exec_straight_step. simpl; reflexivity. auto. + eapply exec_straight_step. simpl; reflexivity. auto. + apply exec_straight_one. simpl; reflexivity. auto. + split; intros; Simpl. + + * change (Int.repr 64) with Int64.iwordsize'. set (n' := Int.sub Int64.iwordsize' n). + econstructor; split. + eapply exec_straight_step. simpl; reflexivity. auto. + eapply exec_straight_step. simpl; reflexivity. auto. + eapply exec_straight_step. simpl; reflexivity. auto. + apply exec_straight_one. simpl; reflexivity. auto. + split; intros; Simpl. - (* cond *) exploit transl_cond_op_correct; eauto. intros (rs' & A & B & C). exists rs'; split. eexact A. eauto with asmgen. |