| public static dDot ( double aStore, int aOffset, int aStride, double bStore, int bOffset, int bStride, int count ) : double | ||
| aStore | double | The first vector a. |
| aOffset | int | Offset in the vector a. |
| aStride | int | The offset between two elements of the vector a. |
| bStore | double | The second vector b. |
| bOffset | int | Offset in the vector a. |
| bStride | int | The offset between two elements of the vector a. |
| count | int | The number of elements to consider. |
| return | double | |
/// <summary>
/// y = A * x + y, where x, y are vectors and A is a matrix.
/// </summary>
/// <param name="aStore">1 dim double array for A.</param>
/// <param name="aOffset">Offset in the array for A.</param>
/// <param name="aRowStride">Rows in A.</param>
/// <param name="aColStride">Columns in A.</param>
/// <param name="xStore">1 dim double array for x.</param>
/// <param name="xOffset">Offset in the array for x.</param>
/// <param name="xStride">Number of entries in x.</param>
/// <param name="yStore">1 dim double array for y.</param>
/// <param name="yOffset">Offset in the array for y.</param>
/// <param name="yStride">Number of entries in y.</param>
/// <param name="rows">Geometry information for the rows.</param>
/// <param name="cols">Geometry information for the columns.</param>
public static void dGemv(
double[] aStore, int aOffset, int aRowStride, int aColStride,
double[] xStore, int xOffset, int xStride,
double[] yStore, int yOffset, int yStride,
int rows, int cols
)
{
int aIndex = aOffset;
int yIndex = yOffset;
for (int n = 0; n < rows; n++)
{
yStore[yIndex] += BlasL1.dDot(aStore, aIndex, aColStride, xStore, xOffset, xStride, cols);
aIndex += aRowStride;
yIndex += yStride;
}
}
/// <summary>
/// Performs a matrix times matrix operation C = A * B with real matrices.
/// </summary>
/// <param name="aStore">The 1-dimensional array for the matrix A.</param>
/// <param name="aOffset">The offset in the array for A.</param>
/// <param name="aRowStride">The difference for skipping one row.</param>
/// <param name="aColStride">The difference for skipping one column.</param>
/// <param name="bStore">The 1-dimensional array for the matrix B.</param>
/// <param name="bOffset">The offset in the array for B.</param>
/// <param name="bRowStride">The difference for skipping one row.</param>
/// <param name="bColStride">The difference for skipping one column.</param>
/// <param name="cStore">The 1-dimensional array for the matrix C.</param>
/// <param name="cOffset">The offset in the array for C.</param>
/// <param name="cRowStride">The difference for skipping one row.</param>
/// <param name="cColStride">The difference for skipping one column.</param>
/// <param name="rowsA">The rows to handle in the matrix A.</param>
/// <param name="colsB">The coluumns to handle in the matrix B.</param>
/// <param name="length">The columns of A / rows of B - or length for the multiplication.</param>
public static void dGemm(double[] aStore, int aOffset, int aRowStride, int aColStride,
double[] bStore, int bOffset, int bRowStride, int bColStride,
double[] cStore, int cOffset, int cRowStride, int cColStride,
int rowsA, int colsB, int length)
{
int aIndex = aOffset;
int cStart = cOffset;
for (int n = 0; n < rowsA; n++)
{
int bIndex = bOffset;
int cIndex = cStart;
for (int m = 0; m < colsB; m++)
{
cStore[cIndex] = BlasL1.dDot(aStore, aIndex, aColStride, bStore, bIndex, bRowStride, length);
bIndex += bColStride;
cIndex += cColStride;
}
aIndex += aRowStride;
cStart += cRowStride;
}
}