GOSTCoin CUDA miner project, compatible with most nvidia cards, containing only gostd algo
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/*
* Copyright 2008-2012 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://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.
*/
#include <thrust/detail/config.h>
#include <thrust/system/cuda/detail/copy_device_to_device.h>
#include <thrust/system/cuda/detail/copy_cross_system.h>
#include <thrust/iterator/iterator_traits.h>
#include <thrust/distance.h>
#include <thrust/transform.h>
#include <thrust/functional.h>
#include <thrust/detail/type_traits.h>
#include <thrust/detail/temporary_array.h>
#include <thrust/system/cuda/detail/trivial_copy.h>
namespace thrust
{
namespace system
{
namespace cuda
{
namespace detail
{
namespace detail
{
template<typename DerivedPolicy,
typename InputIterator,
typename OutputIterator>
OutputIterator copy_device_to_device(execution_policy<DerivedPolicy> &exec,
InputIterator begin,
InputIterator end,
OutputIterator result,
thrust::detail::false_type)
{
// general case (mixed types)
typedef typename thrust::iterator_traits<InputIterator>::value_type InputType;
#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC
return thrust::transform(exec, begin, end, result, thrust::identity<InputType>());
#else
// we're not compiling with nvcc: copy [begin, end) to temp host memory
typename thrust::iterator_traits<InputIterator>::difference_type n = thrust::distance(begin, end);
thrust::host_system_tag temp_exec;
thrust::detail::temporary_array<InputType, thrust::host_system_tag> temp1(temp_exec, begin, end);
// transform temp1 to OutputType in host memory
typedef typename thrust::iterator_traits<OutputIterator>::value_type OutputType;
thrust::detail::temporary_array<OutputType, thrust::host_system_tag> temp2(temp_exec, temp1.begin(), temp1.end());
// copy temp2 to device
result = thrust::system::cuda::detail::copy_cross_system(temp2.begin(), temp2.end(), result);
return result;
#endif // THRUST_DEVICE_COMPILER_NVCC
}
template<typename DerivedPolicy,
typename InputIterator,
typename OutputIterator>
OutputIterator copy_device_to_device(execution_policy<DerivedPolicy> &exec,
InputIterator begin,
InputIterator end,
OutputIterator result,
thrust::detail::true_type)
{
// specialization for device to device when the value_types match, operator= is not overloaded,
// and the iterators are pointers
// how many elements to copy?
typename thrust::iterator_traits<OutputIterator>::difference_type n = end - begin;
thrust::system::cuda::detail::trivial_copy_n(exec, begin, n, result);
return result + n;
}
} // end namespace detail
/////////////////
// Entry Point //
/////////////////
template<typename DerivedPolicy,
typename InputIterator,
typename OutputIterator>
OutputIterator copy_device_to_device(execution_policy<DerivedPolicy> &exec,
InputIterator begin,
InputIterator end,
OutputIterator result)
{
typedef typename thrust::iterator_traits<InputIterator>::value_type InputType;
typedef typename thrust::iterator_traits<OutputIterator>::value_type OutputType;
const bool use_trivial_copy =
thrust::detail::is_same<InputType, OutputType>::value
&& thrust::detail::is_trivial_iterator<InputIterator>::value
&& thrust::detail::is_trivial_iterator<OutputIterator>::value;
// XXX WAR unused variable warning
(void) use_trivial_copy;
return detail::copy_device_to_device(exec, begin, end, result,
thrust::detail::integral_constant<bool, use_trivial_copy>());
}
} // end namespace detail
} // end namespace cuda
} // end namespace system
} // end namespace thrust