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| author | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2013-07-29 12:10:11 +0000 |
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| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2013-07-29 12:10:11 +0000 |
| commit | 41b7ecb127b93b1aecc29a298ec21dc94603e6fa (patch) | |
| tree | 287ce1cbf88caf973534715c7816d57b9089b265 /arm/Asmgenproof1.v | |
| parent | 4bf8b331372388dc9cb39154c986c918df9e071c (diff) | |
| download | compcert-kvx-41b7ecb127b93b1aecc29a298ec21dc94603e6fa.tar.gz compcert-kvx-41b7ecb127b93b1aecc29a298ec21dc94603e6fa.zip | |
Optimize integer divisions by positive constants, turning them into
multiply-high and shifts.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2300 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'arm/Asmgenproof1.v')
| -rw-r--r-- | arm/Asmgenproof1.v | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arm/Asmgenproof1.v b/arm/Asmgenproof1.v index d77006ad..21d2b73c 100644 --- a/arm/Asmgenproof1.v +++ b/arm/Asmgenproof1.v @@ -942,11 +942,12 @@ Proof. eapply exec_straight_two. simpl; eauto. simpl; eauto. auto. auto. intuition Simpl. (* divs *) - econstructor. split. apply exec_straight_one. simpl. rewrite H0. reflexivity. auto. - intuition Simpl. +Local Transparent destroyed_by_op. + econstructor. split. apply exec_straight_one. simpl. rewrite H0. reflexivity. auto. + split. Simpl. simpl; intros. intuition Simpl. (* divu *) econstructor. split. apply exec_straight_one. simpl. rewrite H0. reflexivity. auto. - intuition Simpl. + split. Simpl. simpl; intros. intuition Simpl. (* Oandimm *) generalize (andimm_correct x x0 i k rs m). intros [rs' [A [B C]]]. |