wehub-resource-sync
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright (c) 2024 PaddlePaddle Authors. All Rights Reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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#include "paddle/phi/core/kernel_registry.h"
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#include "paddle/phi/kernels/funcs/eigen/common.h"
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namespace phi {
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template <typename T, typename Context>
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void AddPositionEncodingGradKernel(const Context& dev_ctx,
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const DenseTensor& x_in,
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const DenseTensor& out_grad,
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float alpha,
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float beta,
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DenseTensor* x_grad) {
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auto* dOut = &out_grad;
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auto dout = EigenVector<T>::Flatten(*dOut);
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auto* dX = x_grad;
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dev_ctx.template Alloc<T>(dX);
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auto dx = EigenVector<T>::Flatten(*dX);
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auto* place = dev_ctx.eigen_device();
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dx.device(*place) = dout * static_cast<T>(alpha);
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}
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} // namespace phi
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PD_REGISTER_KERNEL(add_position_encoding_grad,
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CPU,
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ALL_LAYOUT,
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phi::AddPositionEncodingGradKernel,
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float,
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double) {}
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