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 Yurii Shyrma (iuriish@yahoo.com)
+//
+#include <execution/Threads.h>
+#include <ops/declarable/helpers/gammaMathFunc.h>
+#if NOT_EXCLUDED(OP_digamma)
+namespace sd {
+namespace ops {
+namespace helpers {
+
+//////////////////////////////////////////////////////////////////////////
+// calculate digamma function for array elements
+template <typename T>
+static void diGamma_(NDArray& x, NDArray& z) {
+  auto func = PRAGMA_THREADS_FOR {
+    for (auto i = start; i < stop; i++) z.p(i, diGammaScalar<T>(x.e<T>(i)));
+  };
+  samediff::Threads::parallel_for(func, 0, x.lengthOf());
+}
+
+void diGamma(sd::LaunchContext* context, NDArray& x, NDArray& z) {
+  BUILD_SINGLE_SELECTOR(x.dataType(), diGamma_, (x, z), SD_FLOAT_TYPES);
+}
+
+BUILD_SINGLE_TEMPLATE( void diGamma_, (NDArray& x, NDArray& z), SD_FLOAT_TYPES);
+
+}  // namespace helpers
+}  // namespace ops
+}  // namespace sd
+#endif