/// <summary>
/// Add to the destination by scale and source with indices.
/// </summary>
/// <param name="scale">The scale to add by.</param>
/// <param name="source">The source values.</param>
/// <param name="indices">The indices of value collection.</param>
/// <param name="destination">The destination values.</param>
/// <param name="count">The count of items.</param>
public static void AddScale(float scale, ReadOnlySpan <float> source, ReadOnlySpan <int> indices, Span <float> destination, int count)
{
Contracts.AssertNonEmpty(source);
Contracts.AssertNonEmpty(indices);
Contracts.AssertNonEmpty(destination);
Contracts.Assert(count > 0);
Contracts.Assert(count <= source.Length);
Contracts.Assert(count <= indices.Length);
Contracts.Assert(count < destination.Length);
if (Avx.IsSupported)
{
AvxIntrinsics.AddScaleSU(scale, source, indices, destination, count);
}
else if (Sse.IsSupported)
{
SseIntrinsics.AddScaleSU(scale, source, indices, destination, count);
}
else
{
for (int i = 0; i < count; i++)
{
int index = indices[i];
destination[index] += scale * source[i];
}
}
}
public void ManagedAddScaleSUPerf()
{
SseIntrinsics.AddScaleSU(DEFAULT_SCALE, new Span <float>(src), new Span <int>(idx, 0, IDXLEN), new Span <float>(dst));
}
public void AddScaleSU() => SseIntrinsics.AddScaleSU(DEFAULT_SCALE, new Span <float>(src), new Span <int>(idx, 0, IDXLEN), new Span <float>(dst));
public void AddScaleSU() => SseIntrinsics.AddScaleSU(DefaultScale, src, idx, dst, IndexLength);
public void AddScaleSU() => SseIntrinsics.AddScaleSU(DefaultScale, new Span <float>(src), new Span <int>(idx, 0, IndexLength), new Span <float>(dst));