wehub-resource-sync
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
// Copyright (c) 2026 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/aminmax_grad_kernel.h"
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#include "paddle/phi/backends/all_context.h"
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#include "paddle/phi/core/kernel_registry.h"
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#include "paddle/phi/kernels/elementwise_add_kernel.h"
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#include "paddle/phi/kernels/reduce_amax_grad_kernel.h"
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#include "paddle/phi/kernels/reduce_amin_grad_kernel.h"
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namespace phi {
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template <typename T, typename Context>
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void AMinMaxGradKernel(const Context& dev_ctx,
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const DenseTensor& x,
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const DenseTensor& min,
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const DenseTensor& max,
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const DenseTensor& min_grad,
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const DenseTensor& max_grad,
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const std::vector<int64_t>& dims,
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bool keep_dim,
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bool reduce_all,
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DenseTensor* x_grad) {
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if (x_grad && x_grad->numel() == 0) {
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dev_ctx.template Alloc<T>(x_grad);
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return;
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}
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reduce_all = recompute_reduce_all(x, dims, reduce_all);
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// Compute amax grad contribution into x_grad
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ReduceAMaxGradKernel<T, Context>(
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dev_ctx, x, max, max_grad, dims, keep_dim, reduce_all, x_grad);
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// Compute amin grad contribution into a temporary tensor
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DenseTensor amin_x_grad;
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amin_x_grad.Resize(x_grad->dims());
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dev_ctx.template Alloc<T>(&amin_x_grad);
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ReduceAMinGradKernel<T, Context>(
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dev_ctx, x, min, min_grad, dims, keep_dim, reduce_all, &amin_x_grad);
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// x_grad = amax_grad_result + amin_grad_result
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Add<T, Context>(dev_ctx, *x_grad, amin_x_grad, x_grad);
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}
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} // namespace phi
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PD_REGISTER_KERNEL(aminmax_grad,
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CPU,
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ALL_LAYOUT,
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phi::AMinMaxGradKernel,
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float,
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double,
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int,
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int64_t) {}
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#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
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PD_REGISTER_KERNEL(aminmax_grad,
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GPU,
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ALL_LAYOUT,
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phi::AMinMaxGradKernel,
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float,
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double,
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int,
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int64_t) {}
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#endif
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