public static void Example2(GPGPU gpu)
{
ArrayView view1 = new ArrayView();
ArrayView view2 = new ArrayView();
float[] data = Enumerable.Range(0, 1000).Select(t => (float)t).ToArray();
// Two views of the array, simply applying an offset to the array; could slice instead for example.
view1.CreateView(data, 100);
view2.CreateView(data, 200);
for (int i = 0; i < 1000; ++i)
{
data[i] = data[i] * 10f;
}
// Should copy the 'large' array to the device only once; this is referenced by each ArrayView instance.
var dev_view1 = DeviceClassHelper.CreateDeviceObject(gpu, view1);
var dev_view2 = DeviceClassHelper.CreateDeviceObject(gpu, view2);
var dev_result = gpu.Allocate <float>(5);
var hostResult = new float[5];
gpu.Launch(1, 1).Test2(dev_view1, dev_view2, dev_result);
gpu.CopyFromDevice(dev_result, hostResult);
bool pass = (hostResult[0] == 1050f && hostResult[1] == 7f);
Console.WriteLine(pass ? "Pass" : "Fail");
}
public static void Example1(GPGPU gpu)
{
// Create instance and copy this to the GPU.
// Includes a base class and another class as a member.
DerivedClass[] array = new DerivedClass[2];
DerivedClass instance = new DerivedClass();
instance.PopulateMembers();
instance.MemberClassInstance = new MemberClass();
instance.MemberClassInstance.Field = 5;
instance.MemberClassInstance.MemberClassArray = new float[] { 3, 4, 5 };
DerivedClass instance2 = new DerivedClass();
instance2.PopulateMembers();
instance2.MemberClassInstance = new MemberClass();
instance2.MemberClassInstance.Field = 6;
instance2.MemberClassInstance.MemberClassArray = new float[] { 6, 7, 8 };
array[0] = instance;
array[1] = instance2;
DeviceClassHelper.CreateDeviceObject(gpu, array);
// could also use
// var dev_array = DeviceClassHelper.CreateDeviceObject(gpu, array);
// Note that this also copies reference type members to the GPU.
// Create a result array and copy to the GPU:
float[] result = new float[5];
var dev_result = DeviceClassHelper.CreateDeviceObject(gpu, result);
var dev_array = DeviceClassHelper.TryGetDeviceObjectFromHostObject(gpu, array);
gpu.Launch(1, 1).Test(dev_array, dev_result);
DeviceClassHelper.UpdateFromDevice(gpu, result);
bool pass = (result[0] == 18.9f && result[1] == 8.8f && result[2] == 10f && result[3] == 36f);
Console.WriteLine(pass ? "Pass" : "Fail");
}
