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#include <unittest/unittest.h>
#include <thrust/copy.h>
#include <thrust/sequence.h>
#include <thrust/execution_policy.h>
template<typename T>
struct is_even
{
__host__ __device__
bool operator()(T x) { return (static_cast<unsigned int>(x) & 1) == 0; }
};
template<typename T>
struct mod_3
{
__host__ __device__
unsigned int operator()(T x) { return static_cast<unsigned int>(x) % 3; }
};
template<typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Predicate, typename Iterator3>
__global__ void copy_if_kernel(ExecutionPolicy exec, Iterator1 first, Iterator1 last, Iterator2 result1, Predicate pred, Iterator3 result2)
{
*result2 = thrust::copy_if(exec, first, last, result1, pred);
}
template<typename ExecutionPolicy>
void TestCopyIfDevice(ExecutionPolicy exec)
{
size_t n = 1000;
thrust::host_vector<int> h_data = unittest::random_integers<int>(n);
thrust::device_vector<int> d_data = h_data;
typename thrust::host_vector<int>::iterator h_new_end;
typename thrust::device_vector<int>::iterator d_new_end;
thrust::device_vector<
typename thrust::device_vector<int>::iterator
> d_new_end_vec(1);
// test with Predicate that returns a bool
{
thrust::host_vector<int> h_result(n);
thrust::device_vector<int> d_result(n);
h_new_end = thrust::copy_if(h_data.begin(), h_data.end(), h_result.begin(), is_even<int>());
copy_if_kernel<<<1,1>>>(exec, d_data.begin(), d_data.end(), d_result.begin(), is_even<int>(), d_new_end_vec.begin());
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
d_new_end = d_new_end_vec[0];
h_result.resize(h_new_end - h_result.begin());
d_result.resize(d_new_end - d_result.begin());
ASSERT_EQUAL(h_result, d_result);
}
// test with Predicate that returns a non-bool
{
thrust::host_vector<int> h_result(n);
thrust::device_vector<int> d_result(n);
h_new_end = thrust::copy_if(h_data.begin(), h_data.end(), h_result.begin(), mod_3<int>());
copy_if_kernel<<<1,1>>>(exec, d_data.begin(), d_data.end(), d_result.begin(), mod_3<int>(), d_new_end_vec.begin());
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
d_new_end = d_new_end_vec[0];
h_result.resize(h_new_end - h_result.begin());
d_result.resize(d_new_end - d_result.begin());
ASSERT_EQUAL(h_result, d_result);
}
}
void TestCopyIfDeviceSeq()
{
TestCopyIfDevice(thrust::seq);
}
DECLARE_UNITTEST(TestCopyIfDeviceSeq);
void TestCopyIfDeviceDevice()
{
TestCopyIfDevice(thrust::device);
}
DECLARE_UNITTEST(TestCopyIfDeviceDevice);
void TestCopyIfCudaStreams()
{
typedef thrust::device_vector<int> Vector;
Vector data(5);
data[0] = 1;
data[1] = 2;
data[2] = 1;
data[3] = 3;
data[4] = 2;
Vector result(5);
cudaStream_t s;
cudaStreamCreate(&s);
Vector::iterator end = thrust::copy_if(thrust::cuda::par.on(s),
data.begin(),
data.end(),
result.begin(),
is_even<int>());
ASSERT_EQUAL(end - result.begin(), 2);
ASSERT_EQUAL(result[0], 2);
ASSERT_EQUAL(result[1], 2);
cudaStreamDestroy(s);
}
DECLARE_UNITTEST(TestCopyIfCudaStreams);
template<typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Iterator3, typename Predicate, typename Iterator4>
__global__ void copy_if_kernel(ExecutionPolicy exec, Iterator1 first, Iterator1 last, Iterator2 stencil_first, Iterator3 result1, Predicate pred, Iterator4 result2)
{
*result2 = thrust::copy_if(exec, first, last, stencil_first, result1, pred);
}
template<typename ExecutionPolicy>
void TestCopyIfStencilDevice(ExecutionPolicy exec)
{
size_t n = 1000;
thrust::host_vector<int> h_data(n); thrust::sequence(h_data.begin(), h_data.end());
thrust::device_vector<int> d_data(n); thrust::sequence(d_data.begin(), d_data.end());
thrust::host_vector<int> h_stencil = unittest::random_integers<int>(n);
thrust::device_vector<int> d_stencil = unittest::random_integers<int>(n);
thrust::host_vector<int> h_result(n);
thrust::device_vector<int> d_result(n);
typename thrust::host_vector<int>::iterator h_new_end;
typename thrust::device_vector<int>::iterator d_new_end;
thrust::device_vector<
typename thrust::device_vector<int>::iterator
> d_new_end_vec(1);
// test with Predicate that returns a bool
{
thrust::host_vector<int> h_result(n);
thrust::device_vector<int> d_result(n);
h_new_end = thrust::copy_if(h_data.begin(), h_data.end(), h_result.begin(), is_even<int>());
copy_if_kernel<<<1,1>>>(exec, d_data.begin(), d_data.end(), d_result.begin(), is_even<int>(), d_new_end_vec.begin());
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
d_new_end = d_new_end_vec[0];
h_result.resize(h_new_end - h_result.begin());
d_result.resize(d_new_end - d_result.begin());
ASSERT_EQUAL(h_result, d_result);
}
// test with Predicate that returns a non-bool
{
thrust::host_vector<int> h_result(n);
thrust::device_vector<int> d_result(n);
h_new_end = thrust::copy_if(h_data.begin(), h_data.end(), h_result.begin(), mod_3<int>());
copy_if_kernel<<<1,1>>>(exec, d_data.begin(), d_data.end(), d_result.begin(), mod_3<int>(), d_new_end_vec.begin());
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
d_new_end = d_new_end_vec[0];
h_result.resize(h_new_end - h_result.begin());
d_result.resize(d_new_end - d_result.begin());
ASSERT_EQUAL(h_result, d_result);
}
}
void TestCopyIfStencilDeviceSeq()
{
TestCopyIfStencilDevice(thrust::seq);
}
DECLARE_UNITTEST(TestCopyIfStencilDeviceSeq);
void TestCopyIfStencilDeviceDevice()
{
TestCopyIfStencilDevice(thrust::device);
}
DECLARE_UNITTEST(TestCopyIfStencilDeviceDevice);
void TestCopyIfStencilCudaStreams()
{
typedef thrust::device_vector<int> Vector;
typedef Vector::value_type T;
Vector data(5);
data[0] = 1;
data[1] = 2;
data[2] = 1;
data[3] = 3;
data[4] = 2;
Vector result(5);
Vector stencil(5);
stencil[0] = 0;
stencil[1] = 1;
stencil[2] = 0;
stencil[3] = 0;
stencil[4] = 1;
cudaStream_t s;
cudaStreamCreate(&s);
Vector::iterator end = thrust::copy_if(thrust::cuda::par.on(s),
data.begin(),
data.end(),
stencil.begin(),
result.begin(),
thrust::identity<T>());
ASSERT_EQUAL(end - result.begin(), 2);
ASSERT_EQUAL(result[0], 2);
ASSERT_EQUAL(result[1], 2);
cudaStreamDestroy(s);
}
DECLARE_UNITTEST(TestCopyIfStencilCudaStreams);
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