cavis/libnd4j/include/loops/cuda/specials/convertToHalf.cu

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/*******************************************************************************
* 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
// @author Yurii Shyrma, created on 15.11.2018
//
#include <loops/special_kernels.h>
namespace nd4j {
////////////////////////////////////////////////////////////////////////
template<typename T>
__global__ void execConvertToHalf(void *dx, Nd4jLong n, half *dz) {
auto x = reinterpret_cast<T *>(dx);
int tid = threadIdx.x + blockIdx.x * blockDim.x;
for (Nd4jLong i = tid; i < n; i += blockDim.x * gridDim.x)
dz[i] = __float2half(static_cast<T>(x[i]));
}
////////////////////////////////////////////////////////////////////////
template<typename T>
__host__ void convertToHalfGeneric(dim3 &launchDims, cudaStream_t *stream, void *dx, Nd4jLong n, half *dz) {
execConvertToHalf<T><<<launchDims.x, launchDims.y, launchDims.z, *stream>>>(dx, n, dz);
nd4j::DebugHelper::checkErrorCode(stream, "convertToHalfs(...) failed");
}
BUILD_SINGLE_TEMPLATE(template void ND4J_EXPORT convertToHalfGeneric, (dim3 & launchDims, cudaStream_t * stream, void * dx, Nd4jLong n, half * dz), LIBND4J_TYPES);
}