hello_sycl.cpp

// From https://www.codingame.com/playgrounds/48226/introduction-to-sycl/hello-world
// By Codeplay software
#include <CL/sycl.hpp>
#include <iostream>

class vector_addition;

int main(int, char **) {
  cl::sycl::float4 a = {1.0, 2.0, 3.0, 4.0};
  cl::sycl::float4 b = {4.0, 3.0, 2.0, 1.0};
  cl::sycl::float4 c = {0.0, 0.0, 0.0, 0.0};

  cl::sycl::default_selector device_selector;

  cl::sycl::queue queue(device_selector);
  std::cout << "Running on "
            << queue.get_device().get_info<cl::sycl::info::device::name>()
            << "\n";
  {
    cl::sycl::buffer<cl::sycl::float4, 1> a_sycl(&a, cl::sycl::range<1>(1));
    cl::sycl::buffer<cl::sycl::float4, 1> b_sycl(&b, cl::sycl::range<1>(1));
    cl::sycl::buffer<cl::sycl::float4, 1> c_sycl(&c, cl::sycl::range<1>(1));

    queue.submit([&](cl::sycl::handler &cgh) {
      auto a_acc = a_sycl.get_access<cl::sycl::access::mode::read>(cgh);
      auto b_acc = b_sycl.get_access<cl::sycl::access::mode::read>(cgh);
      auto c_acc = c_sycl.get_access<cl::sycl::access::mode::discard_write>(cgh);

      cgh.single_task<class vector_addition>(
          [=]() { c_acc[0] = a_acc[0] + b_acc[0]; });
    });
  }
  std::cout << "  A { " << a.x() << ", " << a.y() << ", " << a.z() << ", " << a.w() << " }\n"
            << "+ B { " << b.x() << ", " << b.y() << ", " << b.z() << ", " << b.w() << " }\n"
            << "------------------\n"
            << "= C { " << c.x() << ", " << c.y() << ", " << c.z() << ", " << c.w() << " }"
            << std::endl;

  return 0;
}