[exo-tflite] Adding AvgPool2DConverter (#7317)

* [exo-tflite] Adding AvgPool2DConverter

AvgPool2DConverter is added, which converts loco::AvgPool2D to locoex::TFLAveragePool2D.

Signed-off-by: Hyun Sik Yoon <hyunsik.yoon@samsung.com>
* fix build error

* fix comments

* fix typo

diff --git a/compiler/exo-tflite/src/Conversion/AvgPool2DConverter.cpp b/compiler/exo-tflite/src/Conversion/AvgPool2DConverter.cpp
new file mode 100644 (file)
index 0000000..0bb8a54
--- /dev/null
+++ b/compiler/exo-tflite/src/Conversion/AvgPool2DConverter.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "AvgPool2DConverter.h"
+
+#include "Dialect/IR/TFLNodes.h"
+
+#include "GraphBlock.h"
+#include "Check.h"
+
+#include <loco.h>
+
+#include <stdex/Memory.h>
+
+namespace exo
+{
+/**
+ * @brief Converts loco::AvgPool2D to locoex::TFLAveragePool2D
+ *
+ * How it works:  (note: ten->fea means input: tensor, output: feature)
+ *
+ * Before:
+ *   Foo ---- FeatureEncode ---- AvgPool2D ---- FeatureDecode ---- Bar
+ *   ten->ten   ten->fea        fea->fea         fea->ten      ten->ten
+ *
+ * After:              AvgPool2D
+ *                    /
+ *   Foo -- FeatureEncode - FeatureDecode - TFLAvgPool2D - FeatureEncode - FeatureDecode -- Bar
+ *   ten->ten  ten->fea       fea->ten        ten->ten       ten->fea        fea->ten    ten->ten
+ *
+ * @note  This method replaces AvgPool2D with "FeatureDecode -- TFLAvgPool2D -- FeatureEncode".
+ *        Redundant nodes will be removed during transforms.
+ */
+bool AvgPool2DConverter::convert(loco::AvgPool2D *origin)
+{
+  auto *graph = origin->graph();
+
+  auto dec = make_feature_decode<DefaultLayout::NHWC>(origin->ifm());
+  auto tfl_average = graph->nodes()->create<locoex::TFLAveragePool2D>();
+  {
+    tfl_average->value(dec);
+
+    // set attributes
+    tfl_average->stride()->w(origin->stride()->horizontal());
+    tfl_average->stride()->h(origin->stride()->vertical());
+
+    tfl_average->filter()->w(origin->window()->horizontal());
+    tfl_average->filter()->h(origin->window()->vertical());
+
+    auto pad = origin->pad();
+    if (pad->bottom() == 0 && pad->top() == 0 && pad->left() == 0 && pad->right() == 0)
+      tfl_average->padding(locoex::Padding::VALID);
+    else
+      tfl_average->padding(locoex::Padding::SAME);
+
+    tfl_average->fusedActivationFunction(locoex::FusedActFunc::NONE);
+  }
+  auto enc = make_feature_encode<DefaultLayout::NHWC>(tfl_average);
+
+  // replace canonical node
+  loco::replace(origin).with(enc);
+  origin->ifm(nullptr);
+
+  return true;
+}
+
+} // namespace exo

diff --git a/compiler/exo-tflite/src/Conversion/AvgPool2DConverter.h b/compiler/exo-tflite/src/Conversion/AvgPool2DConverter.h
new file mode 100644 (file)
index 0000000..f66d02e
--- /dev/null
+++ b/compiler/exo-tflite/src/Conversion/AvgPool2DConverter.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __CONVERSION_AVGPOOL2D_CONVERTER__
+#define __CONVERSION_AVGPOOL2D_CONVERTER__
+
+#include "CanonicalNodeConverter.h"
+
+#include <loco.h>
+
+namespace exo
+{
+
+/**
+ * @brief  Convert loco::AvgPool2D to locoex::TFLAveragePool2D
+ */
+class AvgPool2DConverter : public CanonicalNodeConverter<loco::AvgPool2D>
+{
+public:
+  const char *name(void) const final { return "exo::AvgPool2DConverter"; }
+
+public:
+  bool convert(loco::AvgPool2D *origin) final;
+};
+
+} // namespace exo
+
+#endif // __CONVERSION_AVGPOOL2D_CONVERTER__

diff --git a/compiler/exo-tflite/src/Conversion/CanonicalNodeConverter.cpp b/compiler/exo-tflite/src/Conversion/CanonicalNodeConverter.cpp
index 467f7f0..9cc8d39 100644 (file)
--- a/compiler/exo-tflite/src/Conversion/CanonicalNodeConverter.cpp
+++ b/compiler/exo-tflite/src/Conversion/CanonicalNodeConverter.cpp
@@ -45,7 +45,7 @@ bool CanonicalNodeConverter<CanonicalType>::run(loco::Graph *graph)
 }
 
 // template instantiation
-// TODO loco::AvgPool2D
+template bool CanonicalNodeConverter<loco::AvgPool2D>::run(loco::Graph *graph);
 // TODO loco::ConstGen
 // TODO loco::Conv2D
 // TODO loco::DepthwiseConv2D