public static float L2DistSquared(ReadOnlySpan <float> left, ReadOnlySpan <float> right, int count)
{
Contracts.AssertNonEmpty(left);
Contracts.AssertNonEmpty(right);
Contracts.Assert(count > 0);
Contracts.Assert(count <= left.Length);
Contracts.Assert(count <= right.Length);
if (Avx.IsSupported)
{
return(AvxIntrinsics.Dist2(left, right, count));
}
else if (Sse.IsSupported)
{
return(SseIntrinsics.Dist2(left, right, count));
}
else
{
float norm = 0;
for (int i = 0; i < count; i++)
{
float distance = left[i] - right[i];
norm += distance * distance;
}
return(norm);
}
}
public static float L2DistSquared(ReadOnlySpan <float> a, ReadOnlySpan <float> b, int count)
{
Contracts.AssertNonEmpty(a);
Contracts.AssertNonEmpty(b);
Contracts.Assert(count > 0);
Contracts.Assert(count <= a.Length);
Contracts.Assert(count <= b.Length);
if (Avx.IsSupported)
{
return(AvxIntrinsics.Dist2(a, b, count));
}
else if (Sse.IsSupported)
{
return(SseIntrinsics.Dist2(a, b, count));
}
else
{
float norm = 0;
for (int i = 0; i < count; i++)
{
float distance = a[i] - b[i];
norm += distance * distance;
}
return(norm);
}
}
private static float L2DistSquared(Span <float> a, Span <float> b)
{
if (Sse.IsSupported)
{
return(SseIntrinsics.Dist2(a, b));
}
else
{
float norm = 0;
for (int i = 0; i < b.Length; i++)
{
float distance = a[i] - b[i];
norm += distance * distance;
}
return(norm);
}
}