chore: import upstream snapshot with attribution

2026-07-13 12:40:42 +08:00
commit e25996e7db
15472 changed files with 3536181 additions and 0 deletions
@@ -0,0 +1,85 @@
+// 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.
+#include "paddle/phi/kernels/tensor_unfold_kernel.h"
+#include "paddle/common/flags.h"
+#include "paddle/phi/backends/all_context.h"
+#include "paddle/phi/core/kernel_registry.h"
+
+COMMON_DECLARE_bool(use_stride_kernel);
+
+namespace phi {
+
+template <typename Context>
+void TensorUnfoldKernel(const Context& dev_ctx,
+                        const DenseTensor& input,
+                        int64_t axis,
+                        int64_t size,
+                        int64_t step,
+                        DenseTensor* out) {
+  if (!FLAGS_use_stride_kernel) {
+    PADDLE_THROW(common::errors::Fatal(
+        "FLAGS_use_stride_kernel is closed. Strided kernel "
+        "be called, something wrong has happened!"));
+  }
+  if (axis < 0) {
+    axis += input.dims().size();
+  }
+
+  const DDim& input_dims = input.dims();
+  const DDim& input_stride = input.strides();
+  int64_t max_size =
+      input_dims.size() == 0 ? 1 : input_dims[static_cast<int>(axis)];
+
+  PADDLE_ENFORCE_LE(
+      size,
+      max_size,
+      common::errors::InvalidArgument(
+          "paddle.unfold size(%d) must be less than shape[axis](%d).",
+          size,
+          max_size));
+  PADDLE_ENFORCE_GT(step,
+                    0,
+                    common::errors::InvalidArgument(
+                        "paddle.unfold step must be greater than 0"));
+
+  std::vector<int64_t> shape(input_dims.size() + 1);
+  std::vector<int64_t> stride(input_dims.size() + 1);
+
+  shape[input_dims.size()] = size;
+  stride[input_dims.size()] =
+      input_dims.size() == 0 ? 1 : input_stride[static_cast<int>(axis)];
+  for (int i = 0; i < input_dims.size(); ++i) {
+    if (i == axis) {
+      shape[i] = (input_dims[i] - size) / step + 1;
+      stride[i] = step * input_stride[i];
+    } else {
+      shape[i] = input_dims[i];
+      stride[i] = input_stride[i];
+    }
+  }
+
+  auto meta = out->meta();
+  meta.dims = DDim(shape.data(), static_cast<int>(shape.size()));
+  meta.strides = DDim(stride.data(), static_cast<int>(stride.size()));
+  meta.offset = input.offset();
+  out->set_meta(meta);
+  out->ResetHolder(input.Holder());
+  out->ShareInplaceVersionCounterWith(input);
+}
+
+}  // namespace phi
+
+PD_REGISTER_KERNEL_FOR_ALL_BACKEND_DTYPE(tensor_unfold,
+                                         STRIDED,
+                                         phi::TensorUnfoldKernel) {}