70 lines
2.3 KiB
C++
70 lines
2.3 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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// This file contains various helper methods/classes suited for sparse support
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//
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// @author raver119@gmail.com
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//
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#ifndef LIBND4J_SPECIALS_SPARSE_H
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#define LIBND4J_SPECIALS_SPARSE_H
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#include <pointercast.h>
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namespace nd4j {
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namespace sparse {
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template <typename T>
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class SparseUtils {
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public:
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/**
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* Just simple helper for debugging :)
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*
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* @param indices
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* @param rank
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* @param x
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*/
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static void printIndex(Nd4jLong *indices, int rank, int x);
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static bool ltIndices(Nd4jLong *indices, int rank, Nd4jLong x, Nd4jLong y);
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/**
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* Returns true, if x > y, false otherwise
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* @param indices
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* @param rank
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* @param x
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* @param y
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* @return
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*/
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static bool gtIndices(Nd4jLong *indices, int rank, Nd4jLong x, Nd4jLong y);
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static void swapEverything(Nd4jLong *indices, T *array, int rank, Nd4jLong x, Nd4jLong y);
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static void coo_quickSort_parallel_internal(Nd4jLong *indices, T* array, Nd4jLong left, Nd4jLong right, int cutoff, int rank);
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static void coo_quickSort_parallel(Nd4jLong *indices, T* array, Nd4jLong lenArray, int numThreads, int rank);
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static Nd4jLong coo_quickSort_findPivot(Nd4jLong *indices, T *array, Nd4jLong left, Nd4jLong right,
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int rank);
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static void sortCooIndicesGeneric(Nd4jLong *indices, T *values, Nd4jLong length, int rank);
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};
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}
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}
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#endif //LIBND4J_SPECIALS_SPARSE_H
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