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/*
* 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 "Eltwise.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 EltwiseBuilder::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();
using coco::FeatureLayouts::BCHW;
assert(layer.bottom().size() > 1);
assert(layer.top().size() == 1);
assert(layer.has_eltwise_param());
const auto ¶m = layer.eltwise_param();
using ::caffe::EltwiseParameter_EltwiseOp;
using ::caffe::EltwiseParameter_EltwiseOp_SUM;
using ::caffe::EltwiseParameter_EltwiseOp_PROD;
using Reducer = std::function<coco::Op *(coco::Op * lhs, coco::Op * rhs)>;
using ReducerRegistry = std::map<EltwiseParameter_EltwiseOp, Reducer>;
ReducerRegistry registry;
// MAX are not supported, yet
registry[EltwiseParameter_EltwiseOp_SUM] = [](coco::Op *lhs, coco::Op *rhs) -> coco::Op * {
if (lhs == nullptr)
{
assert(rhs != nullptr);
return rhs;
}
assert(lhs != nullptr && rhs != nullptr);
assert(lhs->module() == rhs->module());
assert(lhs->module() != nullptr);
auto m = lhs->module();
return op_builder(m).push(rhs).push(lhs).add().pop();
};
registry[EltwiseParameter_EltwiseOp_PROD] = [](coco::Op *lhs, coco::Op *rhs) -> coco::Op * {
if (lhs == nullptr)
{
assert(rhs != nullptr);
return rhs;
}
assert(lhs != nullptr && rhs != nullptr);
assert(lhs->module() == rhs->module());
assert(lhs->module() != nullptr);
auto m = lhs->module();
return op_builder(m).push(rhs).push(lhs).mul().pop();
};
// coeff is not supported, yet
assert(!param.coeff().size());
// Decide appropriate reduce function
auto reduce = registry.at(param.operation());
coco::Op *op = nullptr;
for (const auto &ifm_name : layer.bottom())
{
auto ifm_shape = shape_ctx.at(ifm_name);
// NOTE The current implementation does not work in general
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(BCHW::create(as_feature_shape(ifm_shape)));
auto load = op_builder(module).load(ifm_obj).pop();
op = reduce(op, load);
}
assert(op != nullptr);
const auto ofm_name = layer.top(0);
const auto ofm_shape = shape_ctx.at(layer.bottom(0));
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(BCHW::create(as_feature_shape(ofm_shape)));
// Create "Eval" instruction
auto eval = instr_builder(module).eval(ofm_obj, op);
// Append the instruction to the block
blk->instr()->append(eval);
// Update bag and shape context
bag_ctx[ofm_name] = ofm_bag;
shape_ctx[ofm_name] = ofm_shape;
}
} // namespace caffeimport
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