sycl queue.copy(...), queue.fill(...) - Posted on July 21, 2024 - See https://sycl.tech - Logs Home - d0030

sycl queue.copy(...), queue.fill(...)

sycl copy, or fill data between/to sycl accessors, pointers, c++ std shared-pointers.

cpp example 1

cpp/c++ example 1: sycl queue.copy(...)

#include <sycl/sycl.hpp>
#include <iostream>
#include <vector>

// queue.copy(src, dst, count);

int main()
{
	sycl::queue queue{sycl::gpu_selector_v};
	std::vector<float> v1{5,4,3,2,1,0,-1};
	std::vector<float> v2(v1.size());
	queue.copy(v1.data(), v2.data(), v1.size());	// Copy on GPU
	queue.wait();	// Wait GPU
	std::copy(v2.begin(), v2.end(), std::ostream_iterator<float>(std::cout, " ")); // print
	std::cout << std::endl;
}

dpcpp prog.cpp -std=c++23 -o prog

5 4 3 2 1 0 -1

cpp example 2

cpp/c++ example 2: sycl queue.fill(...)

#include <sycl/sycl.hpp>
#include <vector>
#include <iostream>
#include <numbers>

using std::numbers::pi;

int main()
{
	std::vector<double> vector(11);
	sycl::queue queue{sycl::gpu_selector_v};
	auto buffer = new sycl::buffer<double, 1>{vector.data(), sycl::range<1>{vector.size()}};
	auto accessor = sycl::accessor<double, 1, sycl::access_mode::write>{* buffer, sycl::write_only};
	queue.fill(accessor, pi);	// Fill on GPU
	delete buffer;	// Wait
	std::copy(vector.begin(), vector.end(), std::ostream_iterator<double>{std::cout, " "});	// print
	std::cout << std::endl;
}

dpcpp prog.cpp -std=c++23 -o prog

3.14159 3.14159 3.14159 3.14159 3.14159 3.14159 3.14159 3.14159 3.14159 3.14159 3.14159