chore: import upstream snapshot with attribution

libnd4j/include/ops/declarable/generic/linalg/tri.cpp

@@ -0,0 +1,58 @@
+/* ******************************************************************************
+ *
+ *
+ * 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 Yurii Shyrma, created on 31.03.2018
+//
+
+#include <ops/declarable/CustomOperations.h>
+#if NOT_EXCLUDED(OP_tri)
+
+namespace sd {
+namespace ops {
+
+//////////////////////////////////////////////////////////////////////////
+CUSTOM_OP_IMPL(tri, -2, 1, false, 0, 1) {
+  auto output = OUTPUT_VARIABLE(0);
+
+  const int diag = block.numI() > 2 ? INT_ARG(2) : 0;
+  char direction = diag <= 0  || diag == 0 || diag > 0 ? 'l': 'u';
+  BUILD_SINGLE_SELECTOR(output->dataType(), output->fillAsTriangular,
+                        (1., diag, diag, *output, direction),
+                        SD_COMMON_TYPES);  // fill with unities lower triangular block of matrix
+
+
+
+  return Status::OK;
+}
+
+DECLARE_TYPES(tri) { getOpDescriptor()->setAllowedOutputTypes(0, {ALL_FLOATS, ALL_INTS}); }
+
+DECLARE_SHAPE_FN(tri) {
+  const int rows = INT_ARG(0);
+  const int cols = block.numI() > 1 ? INT_ARG(1) : rows;
+
+  auto dtype = block.numD() ? D_ARG(0) : FLOAT32;
+
+  return SHAPELIST(ConstantShapeHelper::getInstance().createShapeInfo(dtype, 'c', {rows, cols}));
+}
+
+}  // namespace ops
+}  // namespace sd
+
+#endif