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#include <unittest/unittest.h>
#include <thrust/iterator/zip_iterator.h>
#include <thrust/scan.h>
using namespace unittest;
template<typename Tuple>
struct TuplePlus
{
__host__ __device__
Tuple operator()(Tuple x, Tuple y) const
{
using namespace thrust;
return make_tuple(get<0>(x) + get<0>(y),
get<1>(x) + get<1>(y));
}
}; // end SumTuple
template <typename T>
struct TestZipIteratorScan
{
void operator()(const size_t n)
{
using namespace thrust;
host_vector<T> h_data0 = unittest::random_samples<T>(n);
host_vector<T> h_data1 = unittest::random_samples<T>(n);
device_vector<T> d_data0 = h_data0;
device_vector<T> d_data1 = h_data1;
typedef tuple<T,T> Tuple;
host_vector<Tuple> h_result(n);
device_vector<Tuple> d_result(n);
// inclusive_scan (tuple output)
inclusive_scan( make_zip_iterator(make_tuple(h_data0.begin(), h_data1.begin())),
make_zip_iterator(make_tuple(h_data0.end(), h_data1.end())),
h_result.begin(),
TuplePlus<Tuple>());
inclusive_scan( make_zip_iterator(make_tuple(d_data0.begin(), d_data1.begin())),
make_zip_iterator(make_tuple(d_data0.end(), d_data1.end())),
d_result.begin(),
TuplePlus<Tuple>());
ASSERT_EQUAL_QUIET(h_result, d_result);
// exclusive_scan (tuple output)
exclusive_scan( make_zip_iterator(make_tuple(h_data0.begin(), h_data1.begin())),
make_zip_iterator(make_tuple(h_data0.end(), h_data1.end())),
h_result.begin(),
make_tuple<T,T>(0,0),
TuplePlus<Tuple>());
exclusive_scan( make_zip_iterator(make_tuple(d_data0.begin(), d_data1.begin())),
make_zip_iterator(make_tuple(d_data0.end(), d_data1.end())),
d_result.begin(),
make_tuple<T,T>(0,0),
TuplePlus<Tuple>());
ASSERT_EQUAL_QUIET(h_result, d_result);
host_vector<T> h_result0(n);
host_vector<T> h_result1(n);
device_vector<T> d_result0(n);
device_vector<T> d_result1(n);
// inclusive_scan (zip_iterator output)
inclusive_scan( make_zip_iterator(make_tuple(h_data0.begin(), h_data1.begin())),
make_zip_iterator(make_tuple(h_data0.end(), h_data1.end())),
make_zip_iterator(make_tuple(h_result0.begin(), h_result1.begin())),
TuplePlus<Tuple>());
inclusive_scan( make_zip_iterator(make_tuple(d_data0.begin(), d_data1.begin())),
make_zip_iterator(make_tuple(d_data0.end(), d_data1.end())),
make_zip_iterator(make_tuple(d_result0.begin(), d_result1.begin())),
TuplePlus<Tuple>());
ASSERT_EQUAL_QUIET(h_result0, d_result0);
ASSERT_EQUAL_QUIET(h_result1, d_result1);
// exclusive_scan (zip_iterator output)
exclusive_scan( make_zip_iterator(make_tuple(h_data0.begin(), h_data1.begin())),
make_zip_iterator(make_tuple(h_data0.end(), h_data1.end())),
make_zip_iterator(make_tuple(h_result0.begin(), h_result1.begin())),
make_tuple<T,T>(0,0),
TuplePlus<Tuple>());
exclusive_scan( make_zip_iterator(make_tuple(d_data0.begin(), d_data1.begin())),
make_zip_iterator(make_tuple(d_data0.end(), d_data1.end())),
make_zip_iterator(make_tuple(d_result0.begin(), d_result1.begin())),
make_tuple<T,T>(0,0),
TuplePlus<Tuple>());
ASSERT_EQUAL_QUIET(h_result0, d_result0);
ASSERT_EQUAL_QUIET(h_result1, d_result1);
}
};
VariableUnitTest<TestZipIteratorScan, SignedIntegralTypes> TestZipIteratorScanInstance;
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