/* ******************************************************************************
 *
 *
 * 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 raver119@gmail.com
// @author Yurii Shyrma, created on 15.11.2018
//
#include <loops/special_kernels.h>


namespace sd {

////////////////////////////////////////////////////////////////////////
template <typename T>
SD_KERNEL void execConvertToHalf(void *dx, LongType n, half *dz) {
  auto x = reinterpret_cast<T *>(dx);
  int tid = threadIdx.x + blockIdx.x * blockDim.x;

  for (LongType i = tid; i < n; i += blockDim.x * gridDim.x) dz[i] = __float2half(static_cast<T>(x[i]));
}

////////////////////////////////////////////////////////////////////////
template <typename T>
SD_HOST void convertToHalfGeneric(dim3 &launchDims, cudaStream_t *stream, void *dx, LongType n, half *dz) {
  execConvertToHalf<T><<<launchDims.x, launchDims.y, launchDims.z, *stream>>>(dx, n, dz);
  DebugHelper::checkErrorCode(stream, "convertToHalfs(...) failed");
}

BUILD_SINGLE_TEMPLATE( void convertToHalfGeneric,
                      (dim3 & launchDims, cudaStream_t *stream, void *dx, sd::LongType n, half *dz), SD_COMMON_TYPES);

}  // namespace sd