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6b8ee90 Nov 2, 2010
@wnbell @nwhitehead @jaredhoberock
38 lines (29 sloc) 883 Bytes
#include <thrust/host_vector.h>
#include <thrust/device_vector.h>
#include <thrust/generate.h>
#include <thrust/reduce.h>
#include <thrust/functional.h>
#include <thrust/random.h>
int my_rand(void)
{
static thrust::default_random_engine rng;
static thrust::uniform_int_distribution<int> dist(0, 9999);
return dist(rng);
}
int main(void)
{
// generate random data on the host
thrust::host_vector<int> h_vec(100);
thrust::generate(h_vec.begin(), h_vec.end(), my_rand);
// transfer to device and compute sum
thrust::device_vector<int> d_vec = h_vec;
// initial value of the reduction
int init = 0;
// binary operation used to reduce values
thrust::plus<int> binary_op;
// compute sum on the device
int sum = thrust::reduce(d_vec.begin(), d_vec.end(), init, binary_op);
// print the sum
std::cout << "sum is " << sum << std::endl;
return 0;
}
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