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

110 lines
4.2 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 raver119@gmail.com
//
#include <op_boilerplate.h>
#if NOT_EXCLUDED(OP_roll)
#include <ops/declarable/headers/parity_ops.h>
#include <ops/declarable/helpers/roll.h>
#include <ops/declarable/helpers/axis.h>
namespace nd4j {
namespace ops {
CONFIGURABLE_OP_IMPL(roll, 1, 1, true, 0, 0) {
auto output = OUTPUT_VARIABLE(0);
auto input = INPUT_VARIABLE(0);
int inputLen = input->lengthOf();
bool shiftIsLinear = block.width() == 1;
std::vector<int> axes;
std::vector<int> shifts;
if (block.width() > 1) {
REQUIRE_TRUE(block.width() == 3, 0, "roll: 3 arguments required for roll - input, shifts and axes. But %i given.", block.width());
auto axesI = INPUT_VARIABLE(2);
auto shiftsI = INPUT_VARIABLE(1);
REQUIRE_TRUE(axesI->rankOf() == shiftsI->rankOf(), 0, "roll: shifts and axes should be the same rank, but %i and %i given.", (int)shiftsI->rankOf(), (int)axesI->rankOf());
REQUIRE_TRUE(axesI->lengthOf() == shiftsI->lengthOf(), 0, "roll: shifts and axes should be the same length, but %i and %i given.", (int)shiftsI->lengthOf(), (int)axesI->lengthOf());
helpers::adjustAxis(axesI->lengthOf(), axesI, axes );
shifts.resize(shiftsI->lengthOf());
for (Nd4jLong i = 0; i < shiftsI->lengthOf(); i++) {
auto shift = shiftsI->e<int>(i);
if (shift < 0) {
shift -= input->sizeAt(i) * (shift / inputLen - 1);
}
else {
shift %= input->sizeAt(i);
}
shifts[i] = shift;
}
}
else {
int shift = INT_ARG(0);
if (shift < 0) {
// convert shift to positive value between 1 and inputLen - 1
shift -= inputLen * (shift / inputLen - 1);
}
else
// cut shift to value between 1 and inputLen - 1
shift %= inputLen;
axes.resize(block.getIArguments()->size() - 1);
if (axes.size())
shifts.resize(axes.size());//emplace_back(shift);
else
shifts.push_back(shift);
for (auto& s: shifts)
s = shift;
for (unsigned e = 0; e < axes.size(); ++e) {
int axis = INT_ARG(e + 1);
REQUIRE_TRUE(axis < input->rankOf() && axis >= -input->rankOf(), 0, "roll: axe value should be between -%i and %i, but %i was given.",
input->rankOf(), input->rankOf() - 1, axis);
axes[e] = (axis < 0? (input->rankOf() + axis) : axis);
}
}
if (block.isInplace()) output = input;
shiftIsLinear = (axes.size() == 0) || (input->rankOf() == 1);
if (shiftIsLinear) {
helpers::rollFunctorLinear(block.launchContext(), input, output, shifts[0], block.isInplace());
}
else {
helpers::rollFunctorFull(block.launchContext(), input, output, shifts, axes, block.isInplace());
}
return Status::OK();
}
DECLARE_TYPES(roll) {
getOpDescriptor()
->setAllowedInputTypes(0,nd4j::DataType::ANY)
->setAllowedInputTypes(1,nd4j::DataType::INT32) // TODO: all ints in future
->setAllowedInputTypes(2,nd4j::DataType::INT32)
->setAllowedOutputTypes(nd4j::DataType::ANY)
->setSameMode(true);
}
}
}
#endif