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
+ ******************************************************************************/
+
+//
+// Created by GS <sgazeos@gmail.com> at 3/30/2018
+//
+
+#include <ops/declarable/CustomOperations.h>
+#include <ops/declarable/helpers/nth_element.h>
+#if NOT_EXCLUDED(OP_nth_element)
+namespace sd {
+namespace ops {
+CUSTOM_OP_IMPL(nth_element, 2, 1, false, 0, 0) {
+  auto input = INPUT_VARIABLE(0);
+  auto n = INPUT_VARIABLE(1);
+  bool reverse = false;
+  if (block.getIArguments()->size() > 0) reverse = (bool)INT_ARG(0);
+
+  auto output = OUTPUT_VARIABLE(0);
+  LongType lastDim = input->sizeAt(-1);
+  int nVal = n->e<int>(0);
+  REQUIRE_TRUE(nVal < lastDim && nVal >= 0, 0,
+               "nth_element: n should be non-negative and less than last dimension size (%lld), but %i was given.",
+               lastDim, n);
+  REQUIRE_TRUE(input->rankOf() > 0, 0, "nth_element: The rank of input array should be at least 1, but %i is given",
+               input->rankOf());  //
+  if (output->lengthOf() == input->lengthOf())
+    output->assign(input);
+  else {
+    helpers::nthElementFunctor(block.launchContext(), input, nVal, output, reverse);
+  }
+  return Status::OK;
+}
+
+DECLARE_SHAPE_FN(nth_element) {
+  auto in = inputShape->at(0);
+  int outRank = shape::rank(in) - 1;
+  LongType* outShape = nullptr;
+  if (outRank > 1) {
+    LongType* outputShape = nullptr;
+    ALLOCATE(outputShape, block.getWorkspace(), shape::shapeInfoLength(outRank), sd::LongType);
+    outputShape[0] = outRank;
+    for (LongType e = 0; e < outRank; e++) outputShape[e + 1] = in[e + 1];
+
+    ShapeUtils::updateStridesAndType(outputShape, in, shape::order(in));
+    outShape = CONSTANT(outputShape);
+  } else if (outRank == 1) {
+    outShape = ConstantShapeHelper::getInstance().vectorShapeInfo(shape::sizeAt(in, static_cast<LongType>(0)), ArrayOptions::dataType(in));
+  } else {
+    outShape = ConstantShapeHelper::getInstance().scalarShapeInfo(ArrayOptions::dataType(in));
+  }
+  return SHAPELIST(outShape);
+}
+DECLARE_TYPES(nth_element) {
+  getOpDescriptor()->setAllowedInputTypes(ANY)->setAllowedOutputTypes(ANY);
+}
+
+}  // namespace ops
+}  // namespace sd
+#endif