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62 lines
2.0 KiB
62 lines
2.0 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 <algorithm>
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#include "paddle/fluid/framework/data_type.h"
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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 EyeFunctor {
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EyeFunctor(int64_t num_columns, T* output)
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: num_columns_(num_columns), output_(output) {}
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HOSTDEVICE void operator()(size_t idx) const {
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output_[idx * num_columns_ + idx] = static_cast<T>(1);
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}
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int64_t num_columns_;
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T* output_;
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};
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template <typename DeviceContext, typename T>
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class EyeKernel : public framework::OpKernel<T> {
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public:
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void Compute(const paddle::framework::ExecutionContext& ctx) const override {
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auto num_rows = ctx.Attr<int64_t>("num_rows");
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auto num_columns = ctx.Attr<int64_t>("num_columns");
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if (num_columns == -1) num_columns = num_rows;
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auto* out_tensor = ctx.Output<framework::Tensor>("Out");
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T* out_data = out_tensor->mutable_data<T>(ctx.GetPlace());
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math::SetConstant<DeviceContext, T> set_zero;
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auto& dev_ctx = ctx.template device_context<DeviceContext>();
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set_zero(dev_ctx, out_tensor, static_cast<T>(0));
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int64_t num_eyes = std::min(num_rows, num_columns);
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platform::ForRange<DeviceContext> for_range(dev_ctx, num_eyes);
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EyeFunctor<T> functor(num_columns, 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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