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60 lines
1.9 KiB
60 lines
1.9 KiB
6 years ago
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/* Copyright (c) 2019 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 "paddle/fluid/framework/op_registry.h"
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#include "paddle/fluid/operators/math/math_function.h"
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#include "paddle/fluid/platform/for_range.h"
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namespace paddle {
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namespace operators {
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template <typename T>
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struct DiagFunctor {
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DiagFunctor(const T* diagonal, int64_t numel, T* output)
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: diagonal_(diagonal), numel_(numel), output_(output) {}
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HOSTDEVICE void operator()(size_t idx) const {
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output_[idx * numel_ + idx] = diagonal_[idx];
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}
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const T* diagonal_;
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int64_t numel_;
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T* output_;
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};
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template <typename DeviceContext, typename T>
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class DiagKernel : 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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auto* diagonal = context.Input<framework::Tensor>("Diagonal");
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auto* diag_data = diagonal->data<T>();
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auto numel = diagonal->numel();
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auto* out = context.Output<framework::Tensor>("Out");
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T* out_data = out->mutable_data<T>(context.GetPlace());
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math::SetConstant<DeviceContext, T> set_zero;
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auto& dev_ctx = context.template device_context<DeviceContext>();
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set_zero(dev_ctx, out, static_cast<T>(0));
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platform::ForRange<DeviceContext> for_range(dev_ctx, numel);
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DiagFunctor<T> functor(diag_data, numel, out_data);
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for_range(functor);
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}
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};
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} // namespace operators
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} // namespace paddle
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