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
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+/* ******************************************************************************
+ *
+ *
+ * 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 George A. Shulinok <sgazeos@gmail.com>
+//
+#include <ops/declarable/helpers/matrix_band.h>
+#if NOT_EXCLUDED(OP_matrix_band)
+namespace sd {
+namespace ops {
+namespace helpers {
+
+template <typename T>
+void matrixBandPart_(NDArray* input, NDArray* output, sd::LongType lowerBand, sd::LongType upperBand) {
+  // TO DO: retrieve all 2D submatrices with last dimensions and process them with given bands
+  sd::LongType M = input->sizeAt(-2);
+  sd::LongType N = input->sizeAt(-1);
+  sd::LongType lastDim = input->rankOf() - 1;
+  sd::LongType preLastDim = input->rankOf() - 2;
+  ResultSet listOut = output->allTensorsAlongDimension({preLastDim, lastDim});
+  ResultSet listDiag = input->allTensorsAlongDimension({preLastDim, lastDim});
+  for (sd::LongType e = 0; e < static_cast<sd::LongType>(listOut.size()); ++e) {
+    NDArray* inputMatrix = listDiag.at(e);
+    NDArray* outputMatrix = listOut.at(e);
+    if (outputMatrix != inputMatrix)  // if not inplace
+      outputMatrix->assign(inputMatrix);
+    if (lowerBand >= 0) {
+      for (sd::LongType row = 0; row < inputMatrix->rows(); ++row) {
+        for (sd::LongType col = 0; col < row; ++col) {
+          if ((row - col) > lowerBand) outputMatrix->p(row, col, 0.);
+
+        }
+
+      }
+    }
+    if (upperBand >= 0) {
+      for (sd::LongType col = 0; col < inputMatrix->columns(); ++col) {
+        for (sd::LongType row = 0; row < col; ++row) {
+          if ((col - row) > upperBand) outputMatrix->p(row, col, 0.);
+        }
+      }
+    }
+  }
+}
+
+void matrixBandPart(sd::LaunchContext* context, NDArray* input, NDArray* output, sd::LongType lowerBand,
+                    sd::LongType upperBand) {
+  BUILD_SINGLE_SELECTOR(input->dataType(), matrixBandPart_, (input, output, lowerBand, upperBand), SD_FLOAT_TYPES);
+}
+BUILD_SINGLE_TEMPLATE( void matrixBandPart_,
+                      (NDArray * input, NDArray* output, sd::LongType lowerBand, sd::LongType upperBand),
+                      SD_FLOAT_TYPES);
+}  // namespace helpers
+}  // namespace ops
+}  // namespace sd
+#endif