chore: import upstream snapshot with attribution

paddle/phi/kernels/strided_copy_kernel.h

@@ -0,0 +1,65 @@
+/* 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. */
+
+#pragma once
+
+#include "paddle/phi/core/dense_tensor.h"
+#include "paddle/phi/core/visit_type.h"
+#include "paddle/phi/kernels/empty_kernel.h"
+
+namespace phi {
+
+/**
+ * @brief copy memory with stride.
+ * @param  ctx     device context
+ * @param  input   Source tensor need copy from
+ * @param  out_stride   Dist tensor's stride
+ * @param  out     Dist tensor need copy to
+ */
+template <typename T, typename Context>
+void StridedCopyKernel(const Context& dev_ctx,
+                       const DenseTensor& input,
+                       const std::vector<int64_t>& dims,
+                       const std::vector<int64_t>& out_stride,
+                       int64_t offset,
+                       DenseTensor* out);
+
+template <typename T, typename Context>
+DenseTensor StridedCopy(const Context& dev_ctx,
+                        const DenseTensor& input,
+                        const std::vector<int64_t>& dims,
+                        const std::vector<int64_t>& out_stride,
+                        size_t offset) {
+  DenseTensor dense_out;
+  StridedCopyKernel<T, Context>(
+      dev_ctx, input, dims, out_stride, offset, &dense_out);
+  return dense_out;
+}
+
+template <typename T, typename Context>
+void StridedElementwiseCopyKernel(const Context& dev_ctx,
+                                  const DenseTensor& input,
+                                  const std::vector<int64_t>& out_dims,
+                                  const std::vector<int64_t>& out_strides,
+                                  int64_t out_offset,
+                                  DenseTensor* out);
+
+#ifdef _WIN32
+#define INSTANTIATE_STRIDEDCOPY_KERNEL(type, context)        \
+  template PADDLE_API void StridedCopyKernel<type, context>( \
+      const context&,                                        \
+      const DenseTensor&,                                    \
+      const std::vector<int64_t>&,                           \
+      const std::vector<int64_t>&,                           \
+      int64_t,                                               \
+      DenseTensor*);
+#endif
+}  // namespace phi