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.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/iterator/iterator_traits.h>
namespace thrust
{
namespace system
{
namespace cuda
{
namespace detail
{
namespace block
{
/* Reduces [data, data + n) using binary_op and stores the result in data[0]
*
* Upon return the elements in [data + 1, data + n) have unspecified values.
*/
template <typename Context, typename ValueIterator, typename BinaryFunction>
__device__ __thrust_forceinline__
void reduce_n(Context context, ValueIterator data, unsigned int n, BinaryFunction binary_op)
{
if (context.block_dimension() < n)
{
for (unsigned int i = context.block_dimension() + context.thread_index(); i < n; i += context.block_dimension())
data[context.thread_index()] = binary_op(data[context.thread_index()], data[i]);
context.barrier();
}
while (n > 1)
{
unsigned int half = n / 2;
if (context.thread_index() < half)
data[context.thread_index()] = binary_op(data[context.thread_index()], data[n - context.thread_index() - 1]);
context.barrier();
n = n - half;
}
}
} // end namespace block
} // end namespace detail
} // end namespace cuda
} // end namespace system
} // end namespace thrust