chore: import upstream snapshot with attribution

paddle/phi/kernels/generate_proposals_kernel.h

@@ -0,0 +1,38 @@
+// 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"
+
+namespace phi {
+
+template <typename T, typename Context>
+void GenerateProposalsKernel(const Context& dev_ctx,
+                             const DenseTensor& scores,
+                             const DenseTensor& bbox_deltas,
+                             const DenseTensor& im_shape,
+                             const DenseTensor& anchors,
+                             const DenseTensor& variances,
+                             int pre_nms_top_n,
+                             int post_nms_top_n,
+                             float nms_thresh,
+                             float min_size,
+                             float eta,
+                             bool pixel_offset,
+                             DenseTensor* rpn_rois,
+                             DenseTensor* rpn_roi_probs,
+                             DenseTensor* rpn_rois_num);
+
+}  // namespace phi