chore: import upstream snapshot with attribution

paddle/phi/kernels/selected_rows/merge_selected_rows_kernel.cc

@@ -0,0 +1,49 @@
+// 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.
+
+#include "paddle/phi/kernels/selected_rows/merge_selected_rows_kernel.h"
+
+#include "paddle/phi/backends/cpu/cpu_context.h"
+#include "paddle/phi/backends/gpu/gpu_context.h"
+#include "paddle/phi/core/kernel_registry.h"
+
+#include "paddle/phi/kernels/funcs/selected_rows_functor.h"
+
+namespace phi::sr {
+
+template <typename T, typename Context>
+void MergeSelectedRowsKernel(const Context& dev_ctx,
+                             const SelectedRows& x,
+                             SelectedRows* out) {
+  funcs::scatter::MergeAdd<Context, T> merge_func;
+  merge_func(dev_ctx, x, out);
+}
+
+}  // namespace phi::sr
+
+PD_REGISTER_KERNEL(merge_selected_rows,
+                   CPU,
+                   ALL_LAYOUT,
+                   phi::sr::MergeSelectedRowsKernel,
+                   float,
+                   double) {}
+
+#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
+PD_REGISTER_KERNEL(merge_selected_rows,
+                   GPU,
+                   ALL_LAYOUT,
+                   phi::sr::MergeSelectedRowsKernel,
+                   float,
+                   double) {}
+#endif