public static void MatrixTimesSource(ReadOnlySpan <float> matrix, ReadOnlySpan <int> rgposSrc, ReadOnlySpan <float> sourceValues,
int posMin, int iposMin, int iposLimit, Span <float> destination, int stride)
{
Contracts.Assert(iposMin >= 0);
Contracts.Assert(iposMin <= iposLimit);
Contracts.Assert(iposLimit <= rgposSrc.Length);
Contracts.AssertNonEmpty(matrix);
Contracts.AssertNonEmpty(sourceValues);
Contracts.AssertNonEmpty(destination);
Contracts.AssertNonEmpty(rgposSrc);
Contracts.Assert(stride > 0);
Contracts.Assert(matrix.Length == destination.Length * sourceValues.Length);
if (iposMin >= iposLimit)
{
destination.Clear();
return;
}
Contracts.AssertNonEmpty(rgposSrc);
Contracts.Assert(stride >= 0);
if (Avx.IsSupported)
{
Contracts.Assert(stride <= destination.Length);
AvxIntrinsics.MatMulP(matrix, rgposSrc, sourceValues, posMin, iposMin, iposLimit, destination, stride, sourceValues.Length);
}
else if (Sse.IsSupported)
{
Contracts.Assert(stride <= destination.Length);
SseIntrinsics.MatMulP(matrix, rgposSrc, sourceValues, posMin, iposMin, iposLimit, destination, stride, sourceValues.Length);
}
else
{
Contracts.Assert(stride <= destination.Length);
for (int i = 0; i < stride; i++)
{
float dotProduct = 0;
for (int j = iposMin; j < iposLimit; j++)
{
int col = rgposSrc[j] - posMin;
dotProduct += matrix[i * sourceValues.Length + col] * sourceValues[col];
}
destination[i] = dotProduct;
}
}
}
public static void MatrixTimesSource(AlignedArray matrix, ReadOnlySpan <int> rgposSrc, AlignedArray sourceValues,
int posMin, int iposMin, int iposLimit, AlignedArray destination, int stride)
{
Contracts.AssertValue(rgposSrc);
Contracts.Assert(iposMin >= 0);
Contracts.Assert(iposMin <= iposLimit);
Contracts.Assert(iposLimit <= rgposSrc.Length);
Contracts.Assert(matrix.Size == destination.Size * sourceValues.Size);
if (iposMin >= iposLimit)
{
destination.ZeroItems();
return;
}
Contracts.AssertNonEmpty(rgposSrc);
Contracts.Assert(stride >= 0);
if (Avx.IsSupported)
{
Contracts.Assert(stride <= destination.Size);
AvxIntrinsics.MatMulP(matrix, rgposSrc, sourceValues, posMin, iposMin, iposLimit, destination, stride, sourceValues.Size);
}
else if (Sse.IsSupported)
{
Contracts.Assert(stride <= destination.Size);
SseIntrinsics.MatMulP(matrix, rgposSrc, sourceValues, posMin, iposMin, iposLimit, destination, stride, sourceValues.Size);
}
else
{
Contracts.Assert(stride <= destination.Size);
for (int i = 0; i < stride; i++)
{
float dotProduct = 0;
for (int j = iposMin; j < iposLimit; j++)
{
int col = rgposSrc[j] - posMin;
dotProduct += matrix[i * sourceValues.Size + col] * sourceValues[col];
}
destination[i] = dotProduct;
}
}
}
public static void MatTimesSrc(AlignedArray mat, int[] rgposSrc, AlignedArray srcValues,
int posMin, int iposMin, int iposLim, AlignedArray dst, int crun)
{
Contracts.AssertValue(rgposSrc);
Contracts.Assert(iposMin >= 0);
Contracts.Assert(iposMin <= iposLim);
Contracts.Assert(iposLim <= rgposSrc.Length);
Contracts.Assert(mat.Size == dst.Size * srcValues.Size);
if (iposMin >= iposLim)
{
dst.ZeroItems();
return;
}
Contracts.AssertNonEmpty(rgposSrc);
Contracts.Assert(crun >= 0);
if (Avx.IsSupported)
{
Contracts.Assert(crun <= dst.Size);
AvxIntrinsics.MatMulP(mat, rgposSrc, srcValues, posMin, iposMin, iposLim, dst, crun, srcValues.Size);
}
else if (Sse.IsSupported)
{
Contracts.Assert(crun <= dst.Size);
SseIntrinsics.MatMulP(mat, rgposSrc, srcValues, posMin, iposMin, iposLim, dst, crun, srcValues.Size);
}
else
{
Contracts.Assert(crun <= dst.Size);
for (int i = 0; i < crun; i++)
{
float dotProduct = 0;
for (int j = iposMin; j < iposLim; j++)
{
int col = rgposSrc[j] - posMin;
dotProduct += mat[i * srcValues.Size + col] * srcValues[col];
}
dst[i] = dotProduct;
}
}
}