1 files changed, 138 insertions, 0 deletions
diff --git a/compiler/enco/frontend/caffe/src/Layer/Pooling.cpp b/compiler/enco/frontend/caffe/src/Layer/Pooling.cpp
new file mode 100644
index 000000000..36220d841
--- /dev/null
+++ b/compiler/enco/frontend/caffe/src/Layer/Pooling.cpp
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2018 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 "Pooling.h"
+#include "PoolingSpec.h"
+#include "IRBuilder.h"
+
+#include <coco/IR/FeatureLayouts.h>
+
+#include <morph/caffe.h>
+
+#include <cassert>
+#include <functional>
+
+using namespace nncc::core::ADT;
+using namespace morph::caffe;
+
+namespace caffeimport
+{
+
+void PoolingBuilder::build(const ::caffe::LayerParameter &layer, GraphBuilderContext *context) const
+{
+  coco::Module *module = context->module();
+  coco::Block *blk = context->block();
+  std::map<std::string, tensor::Shape> &shape_ctx = context->shape_ctx();
+  std::map<std::string, coco::Bag *> &bag_ctx = context->bag_ctx();
+
+  assert(layer.bottom().size() == 1);
+  assert(layer.top().size() == 1);
+
+  assert(layer.has_pooling_param());
+  const auto &param = layer.pooling_param();
+
+  PoolingSpec spec{param};
+  {
+    const auto ifm_name = layer.bottom(0);
+    const auto ifm_shape = shape_ctx.at(ifm_name);
+    spec.ifm_shape(ifm_shape);
+  }
+
+  // Create an object for an input feature map
+  const auto ifm_name = layer.bottom(0);
+  const auto ifm_shape = shape_ctx.at(ifm_name);
+  auto ifm_bag = bag_ctx.at(ifm_name);
+  auto ifm_obj = module->entity()->object()->create<coco::FeatureObject>();
+
+  ifm_obj->bag(ifm_bag);
+  ifm_obj->layout(coco::FeatureLayouts::BCHW::create(as_feature_shape(ifm_shape)));
+
+  // Create an object for an output feature map
+  const auto ofm_name = layer.top(0);
+  const auto ofm_shape = spec.ofm_shape();
+  auto ofm_bag = module->entity()->bag()->create(num_elements(ofm_shape));
+  auto ofm_obj = module->entity()->object()->create<coco::FeatureObject>();
+
+  ofm_obj->bag(ofm_bag);
+  ofm_obj->layout(coco::FeatureLayouts::BCHW::create(as_feature_shape(ofm_shape)));
+
+  using PoolingOpBuilder = std::function<coco::Op *(coco::Module * m, const PoolingSpec &spec)>;
+
+  std::map<PoolingMethod, PoolingOpBuilder> builders;
+
+  // MaxPool2D op builder
+  builders[PoolingMethod::Max] = [ifm_obj](coco::Module *module, const PoolingSpec &spec) {
+    auto load = op_builder(module).load(ifm_obj).pop();
+
+    auto op = module->entity()->op()->create<coco::MaxPool2D>();
+
+    op->arg(load);
+
+    op->window()->height(spec.window_height());
+    op->window()->width(spec.window_width());
+
+    op->stride()->vertical(spec.vertical_stride());
+    op->stride()->horizontal(spec.horizontal_stride());
+
+    op->pad()->top(spec.vertical_pad());
+    op->pad()->bottom(spec.vertical_pad());
+    op->pad()->left(spec.horizontal_pad());
+    op->pad()->right(spec.horizontal_pad());
+
+    return op;
+  };
+
+  // AvgPool2D op builder
+  builders[PoolingMethod::Avg] = [ifm_obj](coco::Module *module, const PoolingSpec &spec) {
+    auto load = op_builder(module).load(ifm_obj).pop();
+
+    auto op = module->entity()->op()->create<coco::AvgPool2D>();
+
+    op->arg(load);
+
+    // NOTE Caffe use static divisor on average pooling
+    op->divisor(coco::AvgPool2D::Divisor::Static);
+
+    op->window()->height(spec.window_height());
+    op->window()->width(spec.window_width());
+
+    op->stride()->vertical(spec.vertical_stride());
+    op->stride()->horizontal(spec.horizontal_stride());
+
+    op->pad()->top(spec.vertical_pad());
+    op->pad()->bottom(spec.vertical_pad());
+    op->pad()->left(spec.horizontal_pad());
+    op->pad()->right(spec.horizontal_pad());
+
+    return op;
+  };
+
+  // Create a pooling op
+  auto builder = builders.at(spec.method());
+  auto op = builder(module, spec);
+
+  // Create a UnitF instruction
+  auto ins = instr_builder(module).eval(ofm_obj, op);
+
+  // Append the instruction to the block
+  blk->instr()->append(ins);
+
+  // Update bag and shape context
+  bag_ctx[ofm_name] = ofm_bag;
+  shape_ctx[ofm_name] = ofm_shape;
+}
+
+} // namespace caffeimport