cavis/libnd4j/include/ops/declarable/helpers/cuda/range.cu

52 lines
2.1 KiB
Plaintext

/*******************************************************************************
* 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 Yurii Shyrma (iuriish@yahoo.com), created on 27.08.2018
//
#include <ops/declarable/helpers/range.h>
namespace nd4j {
namespace ops {
namespace helpers {
template <typename T>
static __global__ void global_range(void *output, Nd4jLong length, T start, T delta) {
auto buff = reinterpret_cast<T*>(output);
const auto tid = blockIdx.x * gridDim.x + threadIdx.x;
const auto step = gridDim.x * blockDim.x;
for(Nd4jLong i = tid; i < length; i += step)
buff[i] = start + i * delta;
}
//////////////////////////////////////////////////////////////////////////
// be careful: outVector must have c-order and ews = 1 !!!
template <typename T>
static void _range(nd4j::LaunchContext * context, const NDArray& start, const NDArray& delta, NDArray& outVector) {
global_range<T><<<512, 512, 2048, *context->getCudaStream()>>>(outVector.getSpecialBuffer(), outVector.lengthOf(), start.e<T>(0), delta.e<T>(0));
}
void range(nd4j::LaunchContext * context, const NDArray& start, const NDArray& delta, NDArray& outVector) {
BUILD_SINGLE_SELECTOR(outVector.dataType(), _range, (context, start, delta, outVector), LIBND4J_TYPES);
}
BUILD_SINGLE_TEMPLATE(template void _range, (nd4j::LaunchContext * context, const NDArray& start, const NDArray& delta, NDArray& outVector), LIBND4J_TYPES);
}
}
}