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57 lines
2.1 KiB
57 lines
2.1 KiB
6 years ago
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/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#pragma once
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#include <functional>
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#include "paddle/fluid/framework/op_registry.h"
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#include "paddle/fluid/operators/math/math_function.h"
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namespace paddle {
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namespace operators {
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template <typename T>
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void GetSize(T start, T end, T step, int64_t* size) {
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PADDLE_ENFORCE(!std::equal_to<T>()(step, 0),
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"The step of range op should not be 0.");
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PADDLE_ENFORCE(((start < end) && (step > 0)) || ((start > end) && (step < 0)),
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"The step should be greater than 0 while start < end. And the "
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"step should be less than 0 while start > end.");
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*size = std::is_integral<T>::value
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? ((std::abs(end - start) + std::abs(step) - 1) / std::abs(step))
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: std::ceil(std::abs((end - start) / step));
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}
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template <typename T>
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class CPURangeKernel : public framework::OpKernel<T> {
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public:
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void Compute(const framework::ExecutionContext& context) const override {
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T start = context.Input<framework::Tensor>("Start")->data<T>()[0];
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T end = context.Input<framework::Tensor>("End")->data<T>()[0];
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T step = context.Input<framework::Tensor>("Step")->data<T>()[0];
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auto* out = context.Output<framework::Tensor>("Out");
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int64_t size = 0;
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GetSize(start, end, step, &size);
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out->Resize(framework::make_ddim({size}));
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T* out_data = out->mutable_data<T>(context.GetPlace());
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T value = start;
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for (int64_t i = 0; i < size; ++i) {
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out_data[i] = value;
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value += step;
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}
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}
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};
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} // namespace operators
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} // namespace paddle
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