commit dbbac8f812a866b1b53f3007721f66038d208549
author Aart Bik <ajcbik@google.com> Fri Sep 01 13:06:08 2017 -0700
committer Aart Bik <ajcbik@google.com> Thu Sep 21 10:20:55 2017 -0700
tree 05cecd927afccd33fc1c14b39ada47e86873f560
parent 2406bf17998e15bd40677a907beb3e9c41facce4

Implement Sum-of-Abs-Differences idiom recognition.

Rationale:
Currently just on ARM64 (x86 lacks proper support),
using the SAD idiom yields great speedup on loops
that compute the sum-of-abs-difference operation.
Also includes some refinements around type conversions.

Speedup ExoPlayerAudio (golem run):
1.3x on ARM64
1.1x on x86

Test: test-art-host test-art-target

Bug: 64091002

Change-Id: Ia2b711d2bc23609a2ed50493dfe6719eedfe0130

compiler/optimizing/nodes.h

diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index a6d0da1..6bc5111 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -1396,6 +1396,7 @@
   M(VecUShr, VecBinaryOperation)                                        \
   M(VecSetScalars, VecOperation)                                        \
   M(VecMultiplyAccumulate, VecOperation)                                \
+  M(VecSADAccumulate, VecOperation)                                     \
   M(VecLoad, VecMemoryOperation)                                        \
   M(VecStore, VecMemoryOperation)                                       \