58 lines
1.4 KiB
Plaintext
58 lines
1.4 KiB
Plaintext
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#include <thrust/transform.h>
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#include <cuda/std/tuple>
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#include <unittest/unittest.h>
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using namespace unittest;
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struct MakeTupleFunctor
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{
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template <typename T1, typename T2>
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_CCCL_HOST_DEVICE cuda::std::tuple<T1, T2> operator()(T1& lhs, T2& rhs)
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{
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return cuda::std::tuple(lhs, rhs);
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}
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};
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template <int N>
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struct GetFunctor
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{
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template <typename Tuple>
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_CCCL_HOST_DEVICE typename cuda::std::tuple_element<N, Tuple>::type operator()(const Tuple& t)
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{
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return cuda::std::get<N>(t);
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}
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};
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template <typename T>
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struct TestTupleTransform
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{
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void operator()(const size_t n)
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{
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thrust::host_vector<T> h_t1 = random_integers<T>(n);
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thrust::host_vector<T> h_t2 = random_integers<T>(n);
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// zip up the data
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thrust::host_vector<cuda::std::tuple<T, T>> h_tuples(n);
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thrust::transform(h_t1.begin(), h_t1.end(), h_t2.begin(), h_tuples.begin(), MakeTupleFunctor());
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// copy to device
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thrust::device_vector<cuda::std::tuple<T, T>> d_tuples = h_tuples;
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thrust::device_vector<T> d_t1(n), d_t2(n);
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// select 0th
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thrust::transform(d_tuples.begin(), d_tuples.end(), d_t1.begin(), GetFunctor<0>());
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// select 1st
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thrust::transform(d_tuples.begin(), d_tuples.end(), d_t2.begin(), GetFunctor<1>());
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ASSERT_ALMOST_EQUAL(h_t1, d_t1);
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ASSERT_ALMOST_EQUAL(h_t2, d_t2);
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ASSERT_EQUAL_QUIET(h_tuples, d_tuples);
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}
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};
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VariableUnitTest<TestTupleTransform, SignedIntegralTypes> TestTupleTransformInstance;
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