sycl-gray-scott.cpp

#include <CL/sycl.hpp>
#include <array>
#include <iostream>

using namespace cl::sycl;

constexpr int SIZE 5;
constexpr int ITER 2;

int main() {

    // Loop through available platforms and devices
    for (auto const& this_platform : platform::get_platforms() ) {
        std::cout << "Found platform: "
            << this_platform.get_info<info::platform::name>() << "\n";
        for (auto const& this_device : this_platform.get_devices() ) {
            std::cout << "  Device: "
                << this_device.get_info<info::device::name>() << "\n";
        }
    }

    // Create SYCL queue
    queue q;

    // Running platform and device
    std::cout << "Running on platform: "
        << q.get_platform().get_info<info::platform::name>() << "\n";
    std::cout << "  Device: "
        << q.get_device().get_info<info::device::name>() << "\n";
    std::cout << "\n";

    // Initialize input array
    std::array<float,SIZE*SIZE> input;
    std::array<float,SIZE*SIZE> output;
    for (int i = 0; i < SIZE; i++) {
        for (int j = 0; j < SIZE; j++) {
            input[i*SIZE+j] = i + j;
        }
    }

    // Create buffers
    buffer<float,2> input_buffer{input.data(),range<2>{SIZE,SIZE}};
    buffer<float,2> output_buffer{output.data(),range<2>{SIZE,SIZE}};

    // Submit command group for execution
    q.submit([&](handler& cgh) {

        // Create accessors for input and output buffers
        accessor input_accessor(input_buffer, cgh, read_only);
        accessor output_accessor(output_buffer, cgh, write_only);

        // Define the kernel
        cgh.parallel_for(SIZE, [=](id<1> idx) {
            output_accessor[idx] = input_accessor[idx] * input_accessor[idx];
        });
    });

    // Wait for the command group to finish
    q.wait();

    // Print the result
    host_accessor output_host_accessor(output_buffer, read_only);
    for (int i = 0; i < SIZE; i++) {
        std::cout << output_host_accessor[i] << " ";
    }
    std::cout << std::endl;

    return 0;
}