public void ArrayViewMultidimensionalAccess(long length)
{
var extent = new LongIndex3D(length);
using var buffer = Accelerator.Allocate3DDenseXY <int>(extent);
var expectedData = Enumerable.Range(0, (int)extent.Size).ToArray();
using (var source = Accelerator.Allocate3DDenseXY <int>(extent))
{
source.AsContiguous().CopyFromCPU(
Accelerator.DefaultStream,
new ReadOnlySpan <int>(expectedData));
Execute((int)extent.Size, buffer.View, source.View);
}
Verify(buffer.AsContiguous(), expectedData);
}
/// <summary>
/// Allocates a 3D buffer on the given accelerator and transfers memory
/// to and from the buffer.
/// </summary>
/// <param name="accelerator">The target accelerator.</param>
static void Alloc3D(Accelerator accelerator)
{
Console.WriteLine($"Performing 3D allocation on {accelerator.Name}");
var data = new int[AllocationSize1D, AllocationSize2D, AllocationSize3D];
for (int i = 0; i < AllocationSize1D; ++i)
{
for (int j = 0; j < AllocationSize2D; ++j)
{
for (int k = 0; k < AllocationSize3D; ++k)
{
data[i, j, k] = ((k * AllocationSize2D) + j) * AllocationSize1D + i;
}
}
}
var targetData = new int[AllocationSize1D, AllocationSize2D, AllocationSize3D];
using (var buffer = accelerator.Allocate3DDenseXY <int>(new LongIndex3D(AllocationSize1D, AllocationSize2D, AllocationSize3D)))
{
// Copy to accelerator
buffer.CopyFromCPU(data);
// Copy from accelerator
buffer.CopyToCPU(targetData);
}
// Verify data
for (int i = 0; i < AllocationSize1D; ++i)
{
for (int j = 0; j < AllocationSize2D; ++j)
{
for (int k = 0; k < AllocationSize3D; ++k)
{
if (data[i, j, k] != targetData[i, j, k])
{
Console.WriteLine($"Error comparing data and target data at {i}, {j}, {k}: {targetData[i, j, k]} found, but {data[i, j, k]} expected");
}
}
}
}
}
