cavis/libnd4j/include/ops/declarable/generic/parity_ops/reduce_max.cpp

162 lines
5.9 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
******************************************************************************/
//
// Created by george@skymind.io on 6/1/2018.
// @author Yurii Shyrma (iuriish@yahoo.com)
//
#include <ops/declarable/CustomOperations.h>
#include <ops/declarable/helpers/transforms.h>
#include <ops/declarable/helpers/axis.h>
namespace nd4j {
namespace ops {
#if NOT_EXCLUDED(OP_reduce_max)
//////////////////////////////////////////////////////////////////////////
CUSTOM_OP_IMPL(reduce_max, 1, 1, false, 0, 0) {
auto input = INPUT_VARIABLE(0);
auto output = OUTPUT_VARIABLE(0);
std::vector<int> dimensions = *block.getIArguments();
if (block.width() > 1) {
auto axesVector = INPUT_VARIABLE(1);
helpers::adjustAxis(input->rankOf(), axesVector, dimensions);
}
REQUIRE_TRUE(dimensions.size() <= input->rankOf(), 0, "REDUCE_MAX OP: the number of dimensions to reduce along must be <= input array rank, but got %i instead" , dimensions.size());
for(const auto& item : dimensions)
REQUIRE_TRUE(item >= -input->shapeInfo()[0] && item < input->shapeInfo()[0], 0, "REDUCE_MAX OP: the input dimension to reduce along must be in range [-%i, %i), but got %i instead !" , input->rankOf(), input->rankOf(), item);
bool keepDims = false;//: false;
if (block.getBArguments()->size() > 0)
keepDims = B_ARG(0);
else if (block.getTArguments()->size() > 0)
keepDims = (bool)T_ARG(0);
input->reduceAlongDimension(reduce::Max, *output, dimensions, keepDims);
return Status::OK();
}
DECLARE_SHAPE_FN(reduce_max) {
bool keepDims = false;//: false;
if (block.getBArguments()->size() > 0)
keepDims = B_ARG(0);
else if (block.getTArguments()->size() > 0)
keepDims = (bool)T_ARG(0);
auto dimensions = *block.getIArguments();
if (block.width() > 1) {
auto axesVector = INPUT_VARIABLE(1);
helpers::adjustAxis(INPUT_VARIABLE(0)->rankOf(), axesVector, dimensions);
}
REQUIRE_TRUE(dimensions.size() <= inputShape->at(0)[0], 0, "REDUCE_MAX OP: the number of dimensions to reduce along must be <= input array rank, but got %i instead" , dimensions.size());
for(const auto& item : dimensions)
REQUIRE_TRUE(item >= -inputShape->at(0)[0] && item < inputShape->at(0)[0], 0, "REDUCE_MAX OP: the input dimension to reduce along must be in range [-%i, %i), but got %i instead !" , inputShape->at(0)[0], inputShape->at(0)[0], item);
Nd4jLong* outShapeInfo = ShapeUtils::evalReduceShapeInfo(shape::order(inputShape->at(0)), dimensions, inputShape->at(0), keepDims, false, block.getWorkspace());
return SHAPELIST(outShapeInfo);
}
DECLARE_TYPES(reduce_max) {
getOpDescriptor()
->setAllowedInputTypes(nd4j::DataType::ANY)
->setSameMode(true);
}
#endif
#if NOT_EXCLUDED(OP_reduce_max_bp)
//////////////////////////////////////////////////////////////////////////
CUSTOM_OP_IMPL(reduce_max_bp, 2, 1, false, 0, 0) {
auto input = INPUT_VARIABLE(0);
auto gradO = INPUT_VARIABLE(1);
auto gradI = OUTPUT_VARIABLE(0);
std::vector<int> dimensions = *block.getIArguments();
if (block.width() > 2) {
auto axesVector = INPUT_VARIABLE(2);
helpers::adjustAxis(input->rankOf(), axesVector, dimensions);
}
REQUIRE_TRUE(dimensions.size() <= input->rankOf(), 0, "REDUCE_MAX_BP OP: the number of dimensions to reduce along must be <= input array rank, but got %i instead" , dimensions.size());
for(const auto& item : dimensions)
REQUIRE_TRUE(item >= -input->shapeInfo()[0] && item < input->shapeInfo()[0], 0, "REDUCE_MAX_BP OP: the input dimension to reduce along must be in range [-%i, %i), but got %i instead !" , input->rankOf(), input->rankOf(), item);
// *** calculations *** //
*gradI = 0;
if(gradO->lengthOf() == 1) {
auto indOfMaxElem = input->indexReduceNumber(nd4j::indexreduce::IndexMax);
gradI->p(indOfMaxElem.t<Nd4jLong>(0), gradO->e(0));
}
else {
auto indicesArr = input->applyIndexReduce(nd4j::indexreduce::IndexMax, dimensions);
helpers::scatterSimple(block.launchContext(), 6, *gradI, *gradO, indicesArr, ShapeUtils::evalDimsToExclude(gradI->rankOf(), dimensions)); // 6 corresponds to copy operation
}
return Status::OK();
}
DECLARE_SHAPE_FN(reduce_max_bp) {
std::vector<int> dimensions = *block.getIArguments();
if (block.width() > 2) {
auto axesVector = INPUT_VARIABLE(2);
helpers::adjustAxis(INPUT_VARIABLE(0)->rankOf(), axesVector, dimensions);
}
REQUIRE_TRUE(dimensions.size() <= inputShape->at(0)[0], 0, "REDUCE_MAX_BP OP: the number of dimensions to reduce along must be <= input array rank, but got %i instead" , dimensions.size());
for(const auto& item : dimensions)
REQUIRE_TRUE(item >= -inputShape->at(0)[0] && item < inputShape->at(0)[0], 0, "REDUCE_MAX_BP OP: the input dimension to reduce along must be in range [-%i, %i), but got %i instead !", inputShape->at(0)[0], inputShape->at(0)[0], item);
Nd4jLong* outShapeInfo;
COPY_SHAPE(inputShape->at(0), outShapeInfo);
return SHAPELIST(CONSTANT(outShapeInfo));
}
DECLARE_TYPES(reduce_max_bp) {
getOpDescriptor()
->setAllowedInputTypes(nd4j::DataType::ANY)
->setAllowedOutputTypes({ALL_FLOATS});
}
#endif
}
}