wehub-resource-sync
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/* ******************************************************************************
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*
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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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* See the NOTICE file distributed with this work for additional
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* information regarding copyright ownership.
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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 <system/common.h>
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#define ND4J_CLIPMODE_THROW 0
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#define ND4J_CLIPMODE_WRAP 1
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#define ND4J_CLIPMODE_CLIP 2
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namespace sd {
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namespace sparse {
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template <typename T>
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class SD_LIB_EXPORT 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(LongType *indices, int rank, int x);
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static bool ltIndices(LongType *indices, int rank, LongType x, LongType 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(LongType *indices, int rank, LongType x, LongType y);
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static void swapEverything(LongType *indices, T *array, int rank, LongType x, LongType y);
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static void coo_quickSort_parallel_internal(LongType *indices, T *array, LongType left, LongType right,
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int cutoff, int rank);
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static void coo_quickSort_parallel(LongType *indices, T *array, LongType lenArray, int numThreads, int rank);
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static LongType coo_quickSort_findPivot(LongType *indices, T *array, LongType left, LongType right,
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int rank);
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static void sortCooIndicesGeneric(LongType *indices, void *vx, LongType length, int rank);
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};
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class SD_LIB_EXPORT IndexUtils {
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public:
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/**
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* Converts indices in COO format into an array of flat indices
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*
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* based on numpy.ravel_multi_index
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*/
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static void ravelMultiIndex(LongType *indices, LongType *flatIndices, LongType length, LongType *shapeInfo, int mode);
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/**
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* Converts flat indices to index matrix in COO format
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*
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* based on numpy.unravel_index
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*/
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static void unravelIndex(LongType *indices, LongType *flatIndices, LongType length, LongType *shapeInfo);
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};
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} // namespace sparse
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} // namespace sd
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#endif // LIBND4J_SPECIALS_SPARSE_H
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