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

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2019-06-06 14:21:15 +02:00
/*******************************************************************************
* 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
******************************************************************************/
#include <ops/declarable/helpers/compare_elem.h>
namespace nd4j {
namespace ops {
namespace helpers {
template<typename T>
static void _compare_elem(NDArray *input, bool isStrictlyIncreasing, bool& output) {
auto length = shape::length(input->getShapeInfo());
int elementsPerThread = length / ELEMENT_THRESHOLD;
int num_threads = nd4j::math::nd4j_max<int>(1, elementsPerThread);
num_threads = nd4j::math::nd4j_min<int>(num_threads, omp_get_max_threads());
Nd4jLong sum = 0;
if(isStrictlyIncreasing) {
PRAGMA_OMP_PARALLEL_FOR_SIMD_REDUCTION(+:sum)
for (int i = 0; i < length - 1; i++) {
auto val0 = input->e<T>(i);
auto val1 = input->e<T>(i + 1);
sum += val0 >= val1 ? -1 : 0;
}
} else {
PRAGMA_OMP_PARALLEL_FOR_SIMD_REDUCTION(+:sum)
for (int i = 0; i < length - 1; i++) {
auto val0 = input->e<T>(i);
auto val1 = input->e<T>(i + 1);
sum += val0 > val1 ? -1 : 0;
}
}
output = (sum > -1);
}
void compare_elem(nd4j::LaunchContext * context, NDArray *input, bool isStrictlyIncreasing, bool& output) {
auto xType = input->dataType();
BUILD_SINGLE_SELECTOR(xType, _compare_elem, (input, isStrictlyIncreasing, output), LIBND4J_TYPES);
}
BUILD_SINGLE_TEMPLATE(template void _compare_elem, (NDArray *A, bool isStrictlyIncreasing, bool& output);, LIBND4J_TYPES);
}
}
}