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 +1,68 @@
+/* ******************************************************************************
+ *
+ *
+ * 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), created on 31.08.2018
+//
+#include <ops/declarable/helpers/histogramFixedWidth.h>
+#if NOT_EXCLUDED(OP_histogram_fixed_width)
+namespace sd {
+namespace ops {
+namespace helpers {
+
+template <typename T>
+void histogramFixedWidth_(NDArray& input, NDArray& range, NDArray& output) {
+  const int nbins = output.lengthOf();
+
+  // firstly initialize output with zeros
+  output.nullify();
+
+  const T leftEdge = static_cast<T>(range.e<double>(0));
+  const T rightEdge = static_cast<T>(range.e<double>(1));
+
+  const T binWidth = (rightEdge - leftEdge) / nbins;
+  const T secondEdge = leftEdge + binWidth;
+  const T lastButOneEdge = rightEdge - binWidth;
+
+  sd::LongType inputLength = input.lengthOf();
+
+  // FIXME: make this one parallel without CRITICAL section
+  for (sd::LongType i = 0; i < inputLength; ++i) {
+    const T value = input.e<T>(i);
+
+    if (value < secondEdge) {
+      output.p<sd::LongType>(0, output.e<sd::LongType>(0) + 1);
+    } else if (value >= lastButOneEdge) {
+      output.p<sd::LongType>(nbins - 1, output.e<sd::LongType>(nbins - 1) + 1);
+    } else {
+      sd::LongType currInd = static_cast<sd::LongType>((value - leftEdge) / binWidth);
+      output.p<sd::LongType>(currInd, output.e<sd::LongType>(currInd) + 1);
+    }
+  }
+}
+
+void histogramFixedWidth(sd::LaunchContext* context, NDArray& input, NDArray& range, NDArray& output) {
+  BUILD_SINGLE_SELECTOR(input.dataType(), histogramFixedWidth_, (input, range, output), SD_COMMON_TYPES);
+}
+BUILD_SINGLE_TEMPLATE( void histogramFixedWidth_, (NDArray& input, NDArray& range, NDArray& output),
+                      SD_COMMON_TYPES);
+
+}  // namespace helpers
+}  // namespace ops
+}  // namespace sd
+#endif