Visible to Intel only — GUID: GUID-DA0B5A9C-EC0B-470C-A1BB-4D7507ABA1EE
Visible to Intel only — GUID: GUID-DA0B5A9C-EC0B-470C-A1BB-4D7507ABA1EE
?dgmm_batch_strided
Computes groups of matrix-vector product using general matrices.
Syntax
call sdgmm_batch_strided(left_right, m, n, a, lda, stridea, x, incx, stridex, c, ldc, stridec, batch_size)
call ddgmm_batch_strided(left_right, m, n, a, lda, stridea, x, incx, stridex, c, ldc, stridec, batch_size)
call cdgmm_batch_strided(left_right, m, n, a, lda, stridea, x, incx, stridex, c, ldc, stridec, batch_size)
call zdgmm_batch_strided(left_right, m, n, a, lda, stridea, x, incx, stridex, c, ldc, stridec, batch_size)
Include Files
- mkl.fi
Description
The ?dgmm_batch_strided routines perform a series of diagonal matrix-matrix product. The diagonal matrices are stored as dense vectors and the operations are performed with group of matrices and vectors.
All matrices a and c and vector x have the same parameters (size, increments) and are stored at constant stride, respectively, given by stridea, stridec, and stridex from each other. The operation is defined as
for i = 0 … batch_size – 1 A and C are matrices at offset i * stridea in a and i * stridec in c X is a vector at offset i * stridex in x C = diag(X) * A or C = A * diag(X) end for
Input Parameters
- left_right
-
CHARACTER*1.
Specifies the position of the diagonal matrix in the matrix product
if left_right = 'L' or 'l' , then C = diag(X) * A;
if left_right = 'R' or 'r' , then C = A * diag(X).
- m
-
INTEGER. Number of rows of the matrices A and C. The value of m must be at least 0.
- n
-
INTEGER. Number of columns of the matrices A and C. The value of n must be at least 0.
- a
-
REAL for sdgmm_batch_strided
DOUBLE PRECISION for ddgmm_batch_strided
COMPLEX for cdgmm_batch_strided
DOUBLE COMPLEX for zdgmm_batch_strided
Array holding all the input matrix A. Must be of size at least lda*k + stridea * (batch_size -1) where k is n if column major layout is used or m if row major layout is used.
- lda
-
INTEGER. Specifies the leading dimension of the matrixA. It must be positive and at least m .
- stridea
-
INTEGER. Stride between two consecutive A matrices, must be at least 0.
- x
-
REAL for sdgmm_batch_strided
DOUBLE PRECISION for ddgmm_batch_strided
COMPLEX for cdgmm_batch_strided
DOUBLE COMPLEX for zdgmm_batch_strided
Array holding all the input vector x. Must be of size at least (1 + (len -1)*abs(incx)) + stridex * (batch_size - 1) where len is n if the diagonal matrix is on the right of the product or m otherwise.
- incx
-
INTEGER. Stride between two consecutive elements of the x vectors.
- stridex
-
INTEGER. Stride between two consecutive x vectors, must be at least 0.
- c
-
REAL for sdgmm_batch_strided
DOUBLE PRECISION for ddgmm_batch_strided
COMPLEX for cdgmm_batch_strided
DOUBLE COMPLEX for zdgmm_batch_strided
Array holding all the input matrix C. Must be of size at least batch_size * stridec.
- ldc
-
INTEGER.
Specifies the leading dimension of the matrix C. It must be positive and at least m .
- stridec
-
INTEGER.
Stride between two consecutive A matrices, must be at least ldc * n .
- batch_size
-
INTEGER.
Number of dgmm computations to perform and a c matrices and x vectors. Must be at least 0.
Output Parameters
- c
-
Array holding the batch_size updated matrices c.