chore: import upstream snapshot with attribution

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

@@ -0,0 +1,51 @@
+/*
+ *  ******************************************************************************
+ *  *
+ *  *
+ *  * 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 <system/op_boilerplate.h>
+#if NOT_EXCLUDED(OP_lgamma)
+
+#include <ops/declarable/CustomOperations.h>
+#include <ops/declarable/helpers/lgamma.h>
+
+namespace sd {
+namespace ops {
+
+OP_IMPL(lgamma, 1, 1, true) {
+  auto x = INPUT_VARIABLE(0);
+  auto z = OUTPUT_VARIABLE(0);
+  helpers::lgamma(block.launchContext(), x, z);
+
+  return Status::OK;
+}
+
+DECLARE_TYPES(lgamma) {
+  getOpDescriptor()
+      ->setAllowedInputTypes({ALL_FLOATS})  // as TF says
+      ->setSameMode(true);
+}
+
+}  // namespace ops
+}  // namespace sd
+
+#endif