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67 lines
2.2 KiB
67 lines
2.2 KiB
/* 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 "paddle/fluid/framework/data_type.h"
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#include "paddle/fluid/framework/framework.pb.h"
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#include "paddle/fluid/framework/op_registry.h"
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#include "paddle/fluid/platform/transform.h"
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namespace paddle {
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namespace operators {
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template <typename InT, typename OutT>
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struct CastOpTransformFunctor {
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HOSTDEVICE OutT operator()(InT in) const { return static_cast<OutT>(in); }
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};
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template <typename DeviceContext, typename InT>
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struct CastOpFunctor {
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const framework::Tensor* in_;
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framework::Tensor* out_;
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const DeviceContext& ctx_;
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CastOpFunctor(const framework::Tensor* in, framework::Tensor* out,
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const DeviceContext& ctx)
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: in_(in), out_(out), ctx_(ctx) {}
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template <typename OutT>
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void apply() const {
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auto* in_begin = in_->data<InT>();
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auto numel = in_->numel();
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auto* in_end = in_begin + numel;
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auto* out_begin = out_->mutable_data<OutT>(ctx_.GetPlace());
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platform::Transform<DeviceContext> trans;
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trans(ctx_, in_begin, in_end, out_begin,
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CastOpTransformFunctor<InT, OutT>());
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}
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};
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template <typename DeviceContext, typename InT>
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class CastOpKernel : public framework::OpKernel<InT> {
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public:
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void Compute(const framework::ExecutionContext& context) const override {
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auto* in = context.Input<framework::Tensor>("X");
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auto* out = context.Output<framework::Tensor>("Out");
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framework::VisitDataType(
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static_cast<framework::proto::VarType::Type>(
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context.Attr<int>("out_dtype")),
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CastOpFunctor<DeviceContext, InT>(
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in, out, context.template device_context<DeviceContext>()));
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}
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};
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} // namespace operators
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} // namespace paddle
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