cavis/libnd4j/include/ops/declarable/generic/transforms/pad.cpp

116 lines
4.8 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 Shyrma Yurii (iuriish@yahoo.com), created on 06.11.2017.
//
#include <op_boilerplate.h>
#if NOT_EXCLUDED(OP_pad)
#include <ops/declarable/CustomOperations.h>
#include<ops/declarable/helpers/transforms.h>
#include <numeric>
namespace nd4j {
namespace ops {
//////////////////////////////////////////////////////////////////////////
CUSTOM_OP_IMPL(pad, 2, 1, false, 0, 1) {
auto input = INPUT_VARIABLE(0);
auto paddings = INPUT_VARIABLE(1);
auto output = OUTPUT_VARIABLE(0);
const int rank = input->rankOf();
// input validation
std::string expectedPaddingsShape = ShapeUtils::shapeAsString({rank, 2});
std::string currentPaddingsShape = ShapeUtils::shapeAsString(paddings);
REQUIRE_TRUE(expectedPaddingsShape == currentPaddingsShape, 0, "PAD op: wrong shape of paddings array, expected is %s, but got %s instead !", expectedPaddingsShape.c_str(), currentPaddingsShape.c_str());
NDArray padValue(input->dataType(), block.launchContext());
// in case of REFLECT and SYMMETRIC modes paddings must obey additional shape requirements
if (INT_ARG(0) == 0) { // CONSTANT mode
if(block.width() > 2) {
REQUIRE_TRUE(input->dataType() == INPUT_VARIABLE(2)->dataType(), 0, "PAD op: data types of input and padValue arrays should be the same but got %i and %i correspondingly !", input->dataType(), INPUT_VARIABLE(2)->dataType());
padValue.assign(INPUT_VARIABLE(2)->e(0));
}
else if (!block.getTArguments()->empty())
padValue = T_ARG(0);
}
else if(INT_ARG(0) == 1) { // REFLECT mode
for(int dim=0; dim < rank; ++dim)
REQUIRE_TRUE(paddings->e<Nd4jLong>(dim,0) <= (input->shapeOf()[dim]-1) && paddings->e<Nd4jLong>(dim,1) <= (input->shapeOf()[dim]-1), 0, "PAD op: wrong content of paddings array for REFLECT mode !");
}
if(INT_ARG(0) == 2) { // SYMMETRIC mode
for(int dim=0; dim < rank; ++dim)
REQUIRE_TRUE(paddings->e<Nd4jLong>(dim,0) <= input->shapeOf()[dim] && paddings->e<Nd4jLong>(dim,1) <= input->shapeOf()[dim], 0, "PAD op: wrong content of paddings array for SYMMETRIC mode !");
}
// CONSTANT->0, REFLECT->1, SYMMETRIC->2
REQUIRE_TRUE(INT_ARG(0) >= 0 && INT_ARG(0) <= 2, 0, "PAD op: unknown padding mode, there are only three possible legal values -> 0,1,2, but got %i instead !", INT_ARG(0));
// std::vector<int> dimensions(input->rankOf());
// std::iota(dimensions.begin(), dimensions.end(), 0); // fill with 0, 1, ... rank-1
// helpers::recursiveLoopForPad(INT_ARG(0), *input, *paddings, *output, dimensions, 0, 0, 0, padValue);
helpers::pad(block.launchContext(), INT_ARG(0), *input, *paddings, *output, padValue);
return Status::OK();
}
DECLARE_TYPES(pad) {
getOpDescriptor()
->setAllowedInputTypes(0, nd4j::DataType::ANY)
->setAllowedInputTypes(1, {DataType::INT32, DataType::INT64}) // INT32 with TF
// ->setAllowedInputTypes(1, {DataType::INT32, DataType::INT64}) // INT32 with TF, but used also INT64 due long shapes
->setSameMode(true);
}
DECLARE_SHAPE_FN(pad) {
// check shape of paddings
auto inputShapeInfo = inputShape->at(0);
auto paddings = INPUT_VARIABLE(1);
const int rank = inputShapeInfo[0];
// paddings validation
std::string expectedPaddingsShape = ShapeUtils::shapeAsString({rank, 2});
std::string currentPaddingsShape = ShapeUtils::shapeAsString(paddings);
REQUIRE_TRUE(expectedPaddingsShape == currentPaddingsShape, 0, "PAD op: wrong shape of paddings array, expected is %s, but got %s instead !", expectedPaddingsShape.c_str(), currentPaddingsShape.c_str());
Nd4jLong* outShapeInfo = nullptr;
ALLOCATE(outShapeInfo, block.getWorkspace(), shape::shapeInfoLength(rank), Nd4jLong);
outShapeInfo[0] = rank;
for(int i=1; i <= rank; ++i)
outShapeInfo[i] = inputShapeInfo[i] + paddings->e<Nd4jLong>(i-1,0) + paddings->e<Nd4jLong>(i-1,1);
ShapeUtils::updateStridesAndType(outShapeInfo, inputShapeInfo, shape::order(inputShapeInfo));
ShapeDescriptor descriptor(outShapeInfo);
RELEASE(outShapeInfo, block.getWorkspace());
return SHAPELIST(ConstantShapeHelper::getInstance()->createShapeInfo(descriptor));
}
}
}
#endif