chore: import upstream snapshot with attribution

2026-07-13 12:47:05 +08:00
commit 4f3b7da785
7394 changed files with 2005594 additions and 0 deletions
@@ -0,0 +1,71 @@
+/* ******************************************************************************
+ *
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ *  See the NOTICE file distributed with this work for additional
+ *  information regarding copyright ownership.
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ******************************************************************************/
+
+//
+//  @author raver119@gmail.com
+//
+#include <ops/declarable/helpers/flatten.h>
+#if NOT_EXCLUDED(OP_flatten)
+namespace sd {
+namespace ops {
+namespace helpers {
+
+template <typename T>
+static void flatten_(std::vector<NDArray *> &inputs, NDArray *output, const char order) {
+  int numArrays = inputs.size();
+  std::vector<sd::LongType> offsets(numArrays);
+  sd::LongType cOffset = 0;
+
+  // calculating offsets in output
+  for (int e = 0; e < numArrays; e++) {
+    offsets[e] = cOffset;
+    cOffset += inputs[e]->lengthOf();
+  }
+
+  // actually transferring data
+  for (sd::LongType e = 0; e < numArrays; e++) {
+    auto z = reinterpret_cast<T *>(output->bufferWithOffset(offsets[e]));
+    auto xBuffer = inputs[e]->bufferAsT<T>();
+    auto xShapeInfo = inputs[e]->shapeInfo();
+
+    // Cache shape-related values outside the inner loop
+    const int xRank = shape::rank(xShapeInfo);
+    const sd::LongType* xShape = shape::shapeOf(xShapeInfo);
+    const sd::LongType* xStride = shape::stride(xShapeInfo);
+    const sd::LongType xLength = inputs[e]->lengthOf();
+
+    for (sd::LongType i = 0; i < xLength; i++) {
+      sd::LongType xOffset;
+      sd::LongType xCoords[SD_MAX_RANK];
+
+      // Use cached shape values for coordinate transforms
+      INDEX2COORDS(i, xRank, xShape, xCoords);
+      COORDS2INDEX(xRank, xStride, xCoords, xOffset);
+
+      z[i] = xBuffer[xOffset];
+    }
+  }
+
+}
+void flatten(sd::LaunchContext *context, std::vector<NDArray *> &inputs, NDArray *output, char order) {
+  BUILD_SINGLE_SELECTOR(output->dataType(), flatten_, (inputs, output, order), SD_COMMON_TYPES);
+}
+}  // namespace helpers
+}  // namespace ops
+}  // namespace sd
+#endif