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Kokkos_Bitset_impl.hpp
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Tue, Jul 15, 10:11

Kokkos_Bitset_impl.hpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#ifndef KOKKOS_BITSET_IMPL_HPP
#define KOKKOS_BITSET_IMPL_HPP
#include <Kokkos_Macros.hpp>
#include <impl/Kokkos_BitOps.hpp>
#include <cstdint>
#include <cstdio>
#include <climits>
#include <iostream>
#include <iomanip>
namespace Kokkos {
namespace Impl {
KOKKOS_FORCEINLINE_FUNCTION
unsigned rotate_right( unsigned i, int r )
{
enum { size = static_cast<int>( sizeof(unsigned) * CHAR_BIT ) };
return r ? ( ( i >> r ) | ( i << ( size - r ) ) ) : i ;
}
template < typename Bitset >
struct BitsetCount
{
typedef Bitset bitset_type;
typedef typename bitset_type::execution_space::execution_space execution_space;
typedef typename bitset_type::size_type size_type;
typedef size_type value_type;
bitset_type m_bitset;
BitsetCount( bitset_type const& bitset )
: m_bitset(bitset)
{}
size_type apply() const
{
size_type count = 0u;
parallel_reduce( m_bitset.m_blocks.dimension_0(), *this, count );
return count;
}
KOKKOS_INLINE_FUNCTION
void init( value_type & count ) const
{
count = 0u;
}
KOKKOS_INLINE_FUNCTION
void join( volatile value_type & count, const volatile size_type & incr ) const
{
count += incr;
}
KOKKOS_INLINE_FUNCTION
void operator()( size_type i, value_type & count ) const
{
count += bit_count( m_bitset.m_blocks[i] );
}
};
} // namespace Impl
} // namespace Kokkos
#endif // KOKKOS_BITSET_IMPL_HPP

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