78 lines
3.3 KiB
C++
78 lines
3.3 KiB
C++
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// Created by GS <sgazeos@gmail.com> at 3/30/2018
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//
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#include <ops/declarable/CustomOperations.h>
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#include <ops/declarable/helpers/nth_element.h>
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namespace nd4j {
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namespace ops {
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CUSTOM_OP_IMPL(nth_element, 2, 1, false, 0, 0) {
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auto input = INPUT_VARIABLE(0);
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auto n = INPUT_VARIABLE(1);
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bool reverse = false;
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if (block.getIArguments()->size() > 0)
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reverse = (bool)INT_ARG(0);
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auto output = OUTPUT_VARIABLE(0);
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Nd4jLong lastDim = input->sizeAt(-1);
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int nVal = n->e<int>(0);
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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);
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REQUIRE_TRUE(input->rankOf() > 0, 0, "nth_element: The rank of input array should be at least 1, but %i is given", input->rankOf()); //
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if (output->lengthOf() == input->lengthOf())
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output->assign(input);
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else {
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// if (!input->isVector() && reverse)
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// n->assign(lastDim - n->e<Nd4jLong>(0) - 1);
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helpers::nthElementFunctor(block.launchContext(), input, nVal, output, reverse);
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}
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return ND4J_STATUS_OK;
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}
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DECLARE_SHAPE_FN(nth_element) {
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auto in = inputShape->at(0);
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int outRank = shape::rank(in) - 1;
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Nd4jLong *outputShape = nullptr;
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if (outRank > 1) {
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ALLOCATE(outputShape, block.getWorkspace(), shape::shapeInfoLength(outRank), Nd4jLong);
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outputShape[0] = outRank;
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for (Nd4jLong e = 0; e < outRank; e++)
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outputShape[e + 1] = in[e + 1];
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ShapeUtils::updateStridesAndType(outputShape, in, shape::order(in));
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outputShape = CONSTANT(outputShape);
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}
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else if (outRank == 1) {
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outputShape = ConstantShapeHelper::getInstance()->vectorShapeInfo(shape::sizeAt(in, 0), ArrayOptions::dataType(in));
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}
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else {
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//outputShape = shape::createScalarShapeInfo();
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outputShape = ConstantShapeHelper::getInstance()->scalarShapeInfo(ArrayOptions::dataType(in));
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}
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return SHAPELIST(outputShape);
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}
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DECLARE_TYPES(nth_element) {
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getOpDescriptor()
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->setAllowedInputTypes(nd4j::DataType::ANY)
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->setAllowedOutputTypes(nd4j::DataType::ANY);
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}
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}
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} |