cavis/libnd4j/include/ops/declarable/helpers/cpu/invertPermutation.cpp

52 lines
1.7 KiB
C++

/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* 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.
*
* 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 20.04.2018
//
#include <ops/declarable/helpers/transforms.h>
#include <helpers/Loops.h>
namespace sd {
namespace ops {
namespace helpers {
////////////////////////////////////////////////////////////////////////
void invertPermutation(sd::LaunchContext * context, const NDArray& input, NDArray& output) {
std::set<int> uniqueElems;
const int length = input.lengthOf();
for(int i = 0; i < length; ++i) {
int elem = input.e<int>(i);
if(!uniqueElems.insert(elem).second) // this operation forbids us to use #pragma omp
throw std::runtime_error("helpers::invertPermutation function: input array contains duplicates !");
if(elem < 0 || elem > length - 1)
throw std::runtime_error("helpers::invertPermutation function: element of input array is out of range (0, length-1) !");
output.p<int>(elem, i);
}
}
}
}
}