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paddlepaddle--paddle/paddle/phi/kernels/xpu/nll_loss_grad_kernel.cc
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2026-07-13 12:40:42 +08:00

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// Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "paddle/phi/kernels/nll_loss_grad_kernel.h"
#include "paddle/phi/backends/xpu/enforce_xpu.h"
#include "paddle/phi/core/kernel_registry.h"
namespace phi {
template <typename T, typename Context>
void NllLossGradKernel(const Context& dev_ctx,
const DenseTensor& x,
const DenseTensor& label,
const optional<DenseTensor>& weight,
const DenseTensor& total_weight,
const DenseTensor& d_out,
int64_t ignore_index,
const std::string& reduction,
DenseTensor* d_x) {
using XPUType = typename XPUTypeTrait<T>::Type;
const auto& label_type = label.dtype();
bool label_type_match =
label_type == DataType::INT32 || label_type == DataType::INT64;
PADDLE_ENFORCE_EQ(label_type_match,
true,
common::errors::InvalidArgument(
"Input(Label) holds the wrong type, it holds %s, but "
"desires to be %s or %s",
label_type,
DataType::INT32,
DataType::INT64));
auto d_out_data = d_out.data<XPUType>();
auto d_x_data = dev_ctx.template Alloc<XPUType>(d_x);
auto d_x_dims = d_x->dims();
std::vector<int64_t> d_x_shape = vectorize<int64_t>(d_x_dims);
auto weight_data =
weight.get_ptr() ? weight.get_ptr()->data<float>() : nullptr;
int64_t reduction_id = 0;
if (reduction == "none") {
reduction_id = 0;
} else if (reduction == "mean") {
reduction_id = 1;
} else if (reduction == "sum") {
reduction_id = 2;
}
auto total_weight_data = total_weight.data<XPUType>();
int r;
if (label_type == DataType::INT32) {
const int* label_data = label.data<int>();
r = xpu::nll_loss_grad(dev_ctx.x_context(),
d_out_data,
d_x_data,
d_x_shape,
label_data,
weight_data,
reduction_id,
ignore_index,
total_weight_data);
} else if (label_type == DataType::INT64) {
const int64_t* label_data = label.data<int64_t>();
r = xpu::nll_loss_grad(dev_ctx.x_context(),
d_out_data,
d_x_data,
d_x_shape,
label_data,
weight_data,
reduction_id,
ignore_index,
total_weight_data);
}
PADDLE_ENFORCE_XDNN_SUCCESS(r, "nll_loss_grad");
}
} // namespace phi
// TODO(xiongkun): add the non-raw kernel register here.
PD_REGISTER_KERNEL(
nll_loss_grad, XPU, ALL_LAYOUT, phi::NllLossGradKernel, float) {}