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TestCXX11Deduction.hpp
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Tue, Jul 23, 08:31

TestCXX11Deduction.hpp
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/*
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// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// documentation and/or other materials provided with the distribution.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#include <Kokkos_Core.hpp>
#ifndef TESTCXX11DEDUCTION_HPP
#define TESTCXX11DEDUCTION_HPP
namespace TestCXX11 {
struct TestReductionDeductionTagA {};
struct TestReductionDeductionTagB {};
template < class ExecSpace >
struct TestReductionDeductionFunctor {
// KOKKOS_INLINE_FUNCTION
// void operator()( long i, long & value ) const
// { value += i + 1; }
KOKKOS_INLINE_FUNCTION
void operator()( TestReductionDeductionTagA, long i, long & value ) const
{ value += ( 2 * i + 1 ) + ( 2 * i + 2 ); }
KOKKOS_INLINE_FUNCTION
void operator()( const TestReductionDeductionTagB &, const long i, long & value ) const
{ value += ( 3 * i + 1 ) + ( 3 * i + 2 ) + ( 3 * i + 3 ); }
};
template< class ExecSpace >
void test_reduction_deduction()
{
typedef TestReductionDeductionFunctor< ExecSpace > Functor;
const long N = 50;
// const long answer = N % 2 ? ( N * ( ( N + 1 ) / 2 ) ) : ( ( N / 2 ) * ( N + 1 ) );
const long answerA = N % 2 ? ( ( 2 * N ) * ( ( ( 2 * N ) + 1 ) / 2 ) ) : ( ( ( 2 * N ) / 2 ) * ( ( 2 * N ) + 1 ) );
const long answerB = N % 2 ? ( ( 3 * N ) * ( ( ( 3 * N ) + 1 ) / 2 ) ) : ( ( ( 3 * N ) / 2 ) * ( ( 3 * N ) + 1 ) );
long result = 0;
// Kokkos::parallel_reduce( Kokkos::RangePolicy< ExecSpace >( 0, N ), Functor(), result );
// ASSERT_EQ( answer, result );
Kokkos::parallel_reduce( Kokkos::RangePolicy< ExecSpace, TestReductionDeductionTagA >( 0, N ), Functor(), result );
ASSERT_EQ( answerA, result );
Kokkos::parallel_reduce( Kokkos::RangePolicy< ExecSpace, TestReductionDeductionTagB >( 0, N ), Functor(), result );
ASSERT_EQ( answerB, result );
}
} // namespace TestCXX11
namespace Test {
TEST_F( TEST_CATEGORY, reduction_deduction )
{
TestCXX11::test_reduction_deduction< TEST_EXECSPACE >();
}
}
#endif

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