wehub-resource-sync
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
// Copyright (c) 2022 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/kernels/label_smooth_grad_kernel.h"
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#include "paddle/phi/backends/cpu/cpu_context.h"
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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 LabelSmoothGradKernel(const Context& dev_ctx,
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const DenseTensor& out_grad,
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float epsilon,
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DenseTensor* label_grad) {
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dev_ctx.template Alloc<T>(label_grad);
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auto d_out_dim = out_grad.dims()[out_grad.dims().size() - 1];
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if (d_out_dim != 0) {
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auto d_out = EigenVector<T>::Flatten(out_grad);
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auto d_in = EigenVector<T>::Flatten(*label_grad);
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auto& dev = *dev_ctx.eigen_device();
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d_in.device(dev) = static_cast<T>(1 - epsilon) * d_out;
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}
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}
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} // namespace phi
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PD_REGISTER_KERNEL(label_smooth_grad,
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CPU,
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ALL_LAYOUT,
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phi::LabelSmoothGradKernel,
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float,
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double) {}
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