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/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* 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 CAFFE2_OPERATORS_TT_PAD_OP_H_
#define CAFFE2_OPERATORS_TT_PAD_OP_H_
#include "caffe2/core/context.h"
#include "caffe2/core/operator.h"
#include "caffe2/utils/math.h"
namespace caffe2 {
template <typename T, class Context, class Engine = DefaultEngine>
class TTPadOp final : public Operator<Context> {
public:
USE_OPERATOR_CONTEXT_FUNCTIONS;
TTPadOp(const OperatorDef& operator_def, Workspace* ws)
: Operator<Context>(operator_def, ws),
scale_(OperatorBase::GetSingleArgument<int64_t>("scale", 0)) {
CAFFE_ENFORCE(
OperatorBase::HasArgument("scale"), "Argument `scale` is missing.");
}
bool RunOnDevice() override {
const auto& X = Input(0);
auto* X_pad = Output(0);
CAFFE_ENFORCE(&X == X_pad);
CAFFE_ENFORCE(X.dim() == 2, X.dim());
auto X_dim0 = X.size(0);
auto X_dim1 = X.size(1);
auto* X_orig_dim0 = Output(1, {1}, at::dtype<int64_t>());
*X_orig_dim0->template mutable_data<int64_t>() = X_dim0;
if (X_dim0 % scale_ != 0) {
int64_t padded_dim0 = (X_dim0 / scale_ + 1) * scale_;
auto dim0_diff = padded_dim0 - X_dim0;
// set growthPct to the upper bound percentage: (100 * scale_ / X_dim0)
X_pad->Extend(dim0_diff, 100 * scale_ / X_dim0);
auto* X_pad_data = X_pad->template mutable_data<T>();
int64_t X_size = X_dim0 * X_dim1;
memset(X_pad_data + X_size, 0, dim0_diff * X_dim1 * sizeof(T));
}
return true;
}
protected:
int64_t scale_;
};
template <typename T, class Context, class Engine = DefaultEngine>
class TTPadGradientOp final : public Operator<Context> {
public:
USE_OPERATOR_CONTEXT_FUNCTIONS;
TTPadGradientOp(const OperatorDef& operator_def, Workspace* ws)
: Operator<Context>(operator_def, ws) {}
bool RunOnDevice() override {
const auto& G = Input(0);
auto* output = Output(0);
CAFFE_ENFORCE(&G == output);
auto old_dim0 = *Input(1).template data<int64_t>();
auto new_dim0 = G.size(0);
auto dim1 = G.size(1);
if (old_dim0 < new_dim0) {
output->ShrinkTo(old_dim0);
}
return true;
}
};
} // namespace caffe2
#endif // CAFFE2_OPERATORS_TT_PAD_OP_H_
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