chore: import upstream snapshot with attribution

paddle/phi/kernels/sparse/pool_kernel.h

@@ -0,0 +1,58 @@
+/* Copyright (c) 2022 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. */
+
+#pragma once
+
+#include "paddle/phi/core/dense_tensor.h"
+#include "paddle/phi/core/sparse_coo_tensor.h"
+#include "paddle/phi/kernels/empty_kernel.h"
+
+namespace phi {
+namespace sparse {
+
+template <typename T, typename Context>
+void MaxPoolCooKernel(const Context& dev_ctx,
+                      const SparseCooTensor& x,
+                      const std::vector<int>& kernel_sizes,
+                      const std::vector<int>& paddings,
+                      const std::vector<int>& dilations,
+                      const std::vector<int>& strides,
+                      SparseCooTensor* out,
+                      DenseTensor* rulebook,
+                      DenseTensor* counter);
+
+template <typename T, typename Context>
+SparseCooTensor MaxPoolCoo(const Context& dev_ctx,
+                           const SparseCooTensor& x,
+                           const std::vector<int>& kernel_sizes,
+                           const std::vector<int>& paddings,
+                           const std::vector<int>& dilations,
+                           const std::vector<int>& strides,
+                           DenseTensor* rulebook,
+                           DenseTensor* counter) {
+  SparseCooTensor coo;
+  MaxPoolCooKernel<T, Context>(dev_ctx,
+                               x,
+                               kernel_sizes,
+                               paddings,
+                               dilations,
+                               strides,
+                               &coo,
+                               rulebook,
+                               counter);
+  return coo;
+}
+
+}  // namespace sparse
+}  // namespace phi