deeplearning4j/deeplearning4j

/* ******************************************************************************
 *
 *
 * 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.
 *
 *  See the NOTICE file distributed with this work for additional
 *  information regarding copyright ownership.
 * 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 GS <sgazeos@gmail.com> at 12/10/2019
//

#include <system/op_boilerplate.h>
#if NOT_EXCLUDED(OP_matrix_inverse)

#include <ops/declarable/CustomOperations.h>
#include <ops/declarable/helpers/lup.h>
namespace sd {
namespace ops {
CUSTOM_OP_IMPL(lu, 1, 2, false, 0, 0) {
  auto input = INPUT_VARIABLE(0);
  auto z = OUTPUT_VARIABLE(0);

  auto p = OUTPUT_VARIABLE(1);
  if (block.getIArguments()->size()) {
    DataType dtype = (DataType)INT_ARG(0);
    REQUIRE_TRUE(dtype == sd::DataType::INT32 || dtype == sd::DataType::INT64, 0,
                 "lu: Permutation data type should be 32bit or 64bit int only, but '%s' given.",
                 DataTypeUtils::asString(dtype).c_str());
  }

  REQUIRE_TRUE(input->rankOf() >= 2, 0, "lu: The rank of input array should not less than 2, but %i is given",
               input->rankOf());
  REQUIRE_TRUE(input->sizeAt(-1) == input->sizeAt(-2), 0,
               "lu: The last two dimmensions should be equal, but %i and %i are given", input->sizeAt(-1),
               input->sizeAt(-2));

  helpers::lu(block.launchContext(), input, z, p);
  return sd::Status::OK;
}

DECLARE_SHAPE_FN(lu) {
  auto in = inputShape->at(0);
  auto shapeVector = ShapeUtils::shapeAsVector(in);
  auto luShape = ShapeBuilders::copyShapeInfoAndType(in, in, true, block.workspace());
  auto dtype = sd::DataType::INT32;
  if (block.getIArguments()->size()) {
    dtype = (DataType)INT_ARG(0);
    REQUIRE_TRUE(dtype == sd::DataType::INT32 || dtype == sd::DataType::INT64, 0,
                 "lu: Permutation data type should be 32bit or 64bit int only, but '%s' given.",
                 DataTypeUtils::asString(dtype).c_str());
  }
  auto luP = ShapeBuilders::createShapeInfo(dtype, shape::order(in), shapeVector.size() - 1, shapeVector.data(),
                                            block.workspace());
  return SHAPELIST(CONSTANT(luShape), CONSTANT(luP));
}

DECLARE_TYPES(lu) {
  getOpDescriptor()
      ->setAllowedInputTypes({ALL_FLOATS})
      ->setAllowedOutputTypes(0, {ALL_FLOATS})
      ->setAllowedOutputTypes(1, {sd::DataType::INT32, sd::DataType::INT64})
      ->setSameMode(false);
}
}  // namespace ops
}  // namespace sd

#endif