wehub-resource-sync
75 lines
2.5 KiB
C++
75 lines
2.5 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/index_select_grad_kernel.h"
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#include "paddle/phi/core/kernel_registry.h"
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#include "paddle/phi/core/utils/data_type.h"
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#include "paddle/phi/kernels/cpu/index_select_impl.h"
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#include "paddle/phi/kernels/full_kernel.h"
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namespace phi {
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template <typename T, typename Context>
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void IndexSelectGradKernel(const Context& dev_ctx,
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const DenseTensor& x UNUSED,
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const DenseTensor& index,
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const DenseTensor& out_grad,
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int dim,
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DenseTensor* x_grad) {
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// x [3, 4], index [5, 0], out [5, 0]
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if (out_grad.numel() == 0) {
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Full<T, Context>(dev_ctx, x.dims(), 0, x_grad);
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return;
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}
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if (dim < 0) {
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dim += out_grad.dims().size();
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}
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const auto& index_type = index.dtype();
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bool index_type_match =
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index_type == DataType::INT32 || index_type == DataType::INT64;
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PADDLE_ENFORCE_EQ(index_type_match,
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true,
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common::errors::InvalidArgument(
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"Input(Index) holds the wrong type, it holds %s, but "
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"desires to be %s or %s",
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index_type,
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DataType::INT32,
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DataType::INT64));
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if (index_type == DataType::INT32) {
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IndexSelectGradInner<Context, T, int>(
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dev_ctx, out_grad, index, x_grad, dim);
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} else if (index_type == DataType::INT64) {
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IndexSelectGradInner<Context, T, int64_t>(
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dev_ctx, out_grad, index, x_grad, dim);
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}
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}
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} // namespace phi
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PD_REGISTER_KERNEL(index_select_grad,
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CPU,
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ALL_LAYOUT,
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phi::IndexSelectGradKernel,
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float,
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double,
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phi::bfloat16,
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phi::complex64,
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phi::complex128,
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int,
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int64_t,
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bool) {}
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