/// <summary>
/// Performs a reduction using a reduction logic.
/// </summary>
/// <typeparam name="T">The underlying type of the reduction.</typeparam>
/// <typeparam name="TShuffleDown">The type of the shuffle logic.</typeparam>
/// <typeparam name="TReduction">The type of the reduction logic.</typeparam>
/// <param name="accelerator">The accelerator.</param>
/// <param name="stream">The accelerator stream.</param>
/// <param name="input">The input elements to reduce.</param>
/// <param name="shuffleDown">The shuffle logic.</param>
/// <param name="reduction">The reduction logic.</param>
/// <remarks>Uses the internal cache to realize a temporary output buffer.</remarks>
/// <returns>The reduced value.</returns>
public static T Reduce <T, TShuffleDown, TReduction>(
this Accelerator accelerator,
AcceleratorStream stream,
ArrayView <T> input,
TShuffleDown shuffleDown,
TReduction reduction)
where T : struct
where TShuffleDown : struct, IShuffleDown <T>
where TReduction : struct, IReduction <T>
{
if (!input.IsValid)
{
throw new ArgumentNullException(nameof(input));
}
if (input.Length < 1)
{
throw new ArgumentOutOfRangeException(nameof(input));
}
var tempStorageSize = accelerator.ComputeReductionTempStorageSize(input.Length);
var storage = accelerator.MemoryCache.Allocate <T>(tempStorageSize + 1);
var output = storage.GetSubView(0, 1);
var temp = storage.GetSubView(1);
accelerator.Reduce(
stream,
input,
output,
temp,
shuffleDown,
reduction);
stream.Synchronize();
accelerator.MemoryCache.CopyTo(out T result, 0);
return(result);
}
/// <summary>
/// Performs a reduction using a reduction logic.
/// </summary>
/// <typeparam name="T">The underlying type of the reduction.</typeparam>
/// <typeparam name="TShuffleDown">The type of the shuffle logic.</typeparam>
/// <typeparam name="TReduction">The type of the reduction logic.</typeparam>
/// <param name="accelerator">The accelerator.</param>
/// <param name="stream">The accelerator stream.</param>
/// <param name="input">The input elements to reduce.</param>
/// <param name="output">The output view to store the reduced value.</param>
/// <param name="shuffleDown">The shuffle logic.</param>
/// <param name="reduction">The reduction logic.</param>
/// <remarks>Uses the internal cache to realize a temporary output buffer.</remarks>
public static void Reduce <T, TShuffleDown, TReduction>(
this Accelerator accelerator,
AcceleratorStream stream,
ArrayView <T> input,
ArrayView <T> output,
TShuffleDown shuffleDown,
TReduction reduction)
where T : struct
where TShuffleDown : struct, IShuffleDown <T>
where TReduction : struct, IReduction <T>
{
if (!input.IsValid)
{
throw new ArgumentNullException(nameof(input));
}
if (input.Length < 1)
{
throw new ArgumentOutOfRangeException(nameof(input));
}
var tempStorageSize = accelerator.ComputeReductionTempStorageSize(input.Length);
var temp = accelerator.MemoryCache.Allocate <T>(tempStorageSize);
accelerator.CreateReduction <T, TShuffleDown, TReduction>()(
stream,
input,
output,
temp,
shuffleDown,
reduction);
}
