Visible to Intel only — GUID: GUID-161EB82A-8EB2-45AB-B204-B4843A916A92
Visible to Intel only — GUID: GUID-161EB82A-8EB2-45AB-B204-B4843A916A92
mkl_?cscmm
Computes matrix-matrix product of a sparse matrix stored in the CSC format (deprecated).
Syntax
call mkl_scscmm(transa, m, n, k, alpha, matdescra, val, indx, pntrb, pntre, b, ldb, beta, c, ldc)
call mkl_dcscmm(transa, m, n, k, alpha, matdescra, val, indx, pntrb, pntre, b, ldb, beta, c, ldc)
call mkl_ccscmm(transa, m, n, k, alpha, matdescra, val, indx, pntrb, pntre, b, ldb, beta, c, ldc)
call mkl_zcscmm(transa, m, n, k, alpha, matdescra, val, indx, pntrb, pntre, b, ldb, beta, c, ldc)
Include Files
- mkl.fi
Description
This routine is deprecated. Use Use mkl_sparse_?_mmfrom the Intel® oneAPI Math Kernel Library (oneMKL) Inspector-executor Sparse BLAS interface instead.
The mkl_?cscmm routine performs a matrix-matrix operation defined as
C := alpha*A*B + beta*C
or
C := alpha*AT*B + beta*C,
or
C := alpha*AH*B + beta*C,
where:
alpha and beta are scalars,
B and C are dense matrices, A is an m-by-k sparse matrix in compressed sparse column (CSC) format, AT is the transpose of A, and AH is the conjugate transpose of A.
This routine supports CSC format both with one-based indexing and zero-based indexing.
Input Parameters
Parameter descriptions are common for all implemented interfaces with the exception of data types that refer here to the FORTRAN 77 standard types. Data types specific to the different interfaces are described in the section "Interfaces" below.
- transa
-
CHARACTER*1. Specifies the operation.
If transa = 'N' or 'n', then C := alpha*A* B + beta*C
If transa = 'T' or 't', then C := alpha*AT*B + beta*C,
If transa ='C' or 'c', then C := alpha*AH*B + beta*C
- m
-
INTEGER. Number of rows of the matrix A.
- n
-
INTEGER. Number of columns of the matrix C.
- k
-
INTEGER. Number of columns of the matrix A.
- alpha
-
REAL for mkl_scscmm.
DOUBLE PRECISION for mkl_dcscmm.
COMPLEX for mkl_ccscmm.
DOUBLE COMPLEX for mkl_zcscmm.
Specifies the scalar alpha.
- matdescra
-
CHARACTER. Array of six elements, specifies properties of the matrix used for operation. Only first four array elements are used, their possible values are given in Table “Possible Values of the Parameter matdescra (descra)”. Possible combinations of element values of this parameter are given in Table “Possible Combinations of Element Values of the Parameter matdescra”.
- val
-
REAL for mkl_scscmm.
DOUBLE PRECISION for mkl_dcscmm.
COMPLEX for mkl_ccscmm.
DOUBLE COMPLEX for mkl_zcscmm.
Array containing non-zero elements of the matrix A.
For one-based indexing its length is pntrb(k) - pntrb(1).
For zero-based indexing its length is pntre(m-1) - pntrb(0).
Refer to values array description in CSC Format for more details.
- indx
-
INTEGER. Array containing the row indices for each non-zero element of the matrix A.
Its length is equal to length of the val array.
Refer to rows array description in CSC Format for more details.
- pntrb
-
INTEGER. Array of length k.
For one-based indexing this array contains column indices, such that pntrb(i) - pntrb(1) + 1 is the first index of column i in the arrays val and indx.
For zero-based indexing this array contains column indices, such that pntrb(i) - pntrb(0) is the first index of column i in the arrays val and indx.
Refer to pointerb array description in CSC Format for more details.
- pntre
-
INTEGER. Array of length k.
For one-based indexing this array contains column indices, such that pntre(i) - pntrb(1) is the last index of column i in the arrays val and indx.
For zero-based indexing this array contains column indices, such that pntre(i) - pntrb(1) - 1 is the last index of column i in the arrays val and indx.
Refer to pointerE array description in CSC Format for more details.
- b
-
REAL for mkl_scscmm.
DOUBLE PRECISION for mkl_dcscmm.
COMPLEX for mkl_ccscmm.
DOUBLE COMPLEX for mkl_zcscmm.
Array, size ldb by at least n for non-transposed matrix A and at least m for transposed for one-based indexing, and (at least k for non-transposed matrix A and at least m for transposed, ldb) for zero-based indexing.
On entry with transa = 'N' or 'n', the leading k-by-n part of the array b must contain the matrix B, otherwise the leading m-by-n part of the array b must contain the matrix B.
- ldb
-
INTEGER. Specifies the leading dimension of b for one-based indexing, and the second dimension of b for zero-based indexing, as declared in the calling (sub)program.
- beta
-
REAL*8. Specifies the scalar beta.
- c
-
REAL for mkl_scscmm.
DOUBLE PRECISION for mkl_dcscmm.
COMPLEX for mkl_ccscmm.
DOUBLE COMPLEX for mkl_zcscmm.
Array, size ldc by n for one-based indexing, and (m, ldc) for zero-based indexing.
On entry, the leading m-by-n part of the array c must contain the matrix C, otherwise the leading k-by-n part of the array c must contain the matrix C.
- ldc
-
INTEGER. Specifies the leading dimension of c for one-based indexing, and the second dimension of c for zero-based indexing, as declared in the calling (sub)program.
Output Parameters
- c
-
Overwritten by the matrix (alpha*A*B + beta* C) or (alpha*AT*B + beta*C) or (alpha*AH*B + beta*C).
Interfaces
FORTRAN 77:
SUBROUTINE mkl_scscmm(transa, m, n, k, alpha, matdescra, val, indx,
pntrb, pntre, b, ldb, beta, c, ldc)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, n, k, ldb, ldc
INTEGER indx(*), pntrb(k), pntre(k)
REAL alpha, beta
REAL val(*), b(ldb,*), c(ldc,*)
SUBROUTINE mkl_dcscmm(transa, m, n, k, alpha, matdescra, val, indx,
pntrb, pntre, b, ldb, beta, c, ldc)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, n, k, ldb, ldc
INTEGER indx(*), pntrb(k), pntre(k)
DOUBLE PRECISION alpha, beta
DOUBLE PRECISION val(*), b(ldb,*), c(ldc,*)
SUBROUTINE mkl_ccscmm(transa, m, n, k, alpha, matdescra, val, indx,
pntrb, pntre, b, ldb, beta, c, ldc)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, n, k, ldb, ldc
INTEGER indx(*), pntrb(k), pntre(k)
COMPLEX alpha, beta
COMPLEX val(*), b(ldb,*), c(ldc,*)
SUBROUTINE mkl_zcscmm(transa, m, n, k, alpha, matdescra, val, indx,
pntrb, pntre, b, ldb, beta, c, ldc)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, n, k, ldb, ldc
INTEGER indx(*), pntrb(k), pntre(k)
DOUBLE COMPLEX alpha, beta
DOUBLE COMPLEX val(*), b(ldb,*), c(ldc,*)