1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
//*****************************************************************************
// Copyright 2017-2019 Intel Corporation
//
// 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 <list>
#include <memory>
#include <unordered_map>
#include <unordered_set>
#include "backprop_function.hpp"
#include "ngraph/autodiff/adjoints.hpp"
#include "ngraph/function.hpp"
#include "ngraph/node.hpp"
#include "ngraph/op/add.hpp"
#include "ngraph/op/broadcast.hpp"
#include "ngraph/op/constant.hpp"
#include "ngraph/op/convert.hpp"
using namespace ngraph;
std::shared_ptr<Function> autodiff::backprop_function(const std::shared_ptr<Function>& f)
{
auto Y_out = f->output(0);
auto Xs = f->get_parameters();
auto C = std::make_shared<op::Parameter>(Y_out.get_element_type(), Y_out.get_shape());
Adjoints adjoints(OutputVector{Y_out}, OutputVector{C});
std::vector<std::shared_ptr<Node>> dYdXs(Xs.size());
transform(Xs.begin(), Xs.end(), dYdXs.begin(), [C, &adjoints](const std::shared_ptr<Node>& X) {
return adjoints.backprop_node(X);
});
std::vector<std::shared_ptr<op::Parameter>> params(Xs);
params.push_back(C);
return std::make_shared<Function>(dYdXs, params);
}