/*
 *  ******************************************************************************
 *  *
 *  *
 *  * 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
 *  *****************************************************************************
 */

//
// @author George A. Shulinok <sgazeos@gmail.com>
//
#include <execution/Threads.h>
#include <ops/declarable/helpers/lgamma.h>
#if NOT_EXCLUDED(OP_lgamma)
namespace sd {
namespace ops {
namespace helpers {

//////////////////////////////////////////////////////////////////////////
// calculate digamma function for array elements
template <typename T>
static void lgamma_(NDArray* x, NDArray* z) {
  auto lgammaProc = LAMBDA_T(x_) {
    auto output = math::sd_lgamma<T,T>(x_);
    return output;
  });

  x->applyLambda<T>(lgammaProc, z);
}

void lgamma(sd::LaunchContext* context, NDArray* x, NDArray* z) {
  BUILD_SINGLE_SELECTOR(x->dataType(), lgamma_, (x, z), SD_FLOAT_TYPES);
}

BUILD_SINGLE_TEMPLATE( void lgamma_, (NDArray * x, NDArray* z), SD_FLOAT_TYPES);

}  // namespace helpers
}  // namespace ops
}  // namespace sd
#endif