csc_dusmm csc_dusmv csc_dussm csc_dussv csr_dusmm csr_dusmv csr_dussm csr_dussv ssc_dusmv ssr_dusmv

csr_dusmm() void csr_dusmm ( char  trans, char  order, int  m, int  n, int  nrhs, double  alpha, const double  val[], const int  rowptr[], const int  colind[], int  base, int  ldb, const double  b[], double  beta, int  ldc, double  c[], int *  info  ) C <- αAB + βC or C <- αATB + βC (CSR) Purpose This function performs one of the following matrix-vector operations for a sparse matrix in CSR format. C <- αAB + βC or C <- αA^TB + βC where α and β are scalars, A or A^T is an m x n sparse matrix, B is an n x nrhs dense matrix, and C is an m x nrhs dense matrix. Parameters [in] trans Specifies the operation to be performed. = 'N': C <- αAB + βC. = 'T' or 'C': C <- αA^TB + βC. [in] order Storage order of b[] and c[]. = 'C': Column major. = 'R': Row major. [in] m Number of rows of matrix A. (m >= 0) (If m = 0, returns without computation) [in] n Number of columns of matrix A. (n >= 0) (If n = 0, returns without computation) [in] nrhs Number of columns of matrices B and C. (nrhs >= 0) (if nrhs = 0, returns without computation) [in] alpha Scalar α [in] val[] Array val[lval] (lval >= nnz) Values of nonzero elements of matrix A (where nnz is the number of nonzero elements). [in] rowptr[] Array rowptr[lrowptr] (lrowptr >= n + 1) Row pointers of matrix A. [in] colind[] Array colind[lcolind] (lcolind >= nnz) Column indices of matrix A (where nnz is the number of nonzero elements). [in] base Indexing of rowptr[] and colind[]. = 0: Zero-based (C style) indexing: Starting index is 0. = 1: One-based (Fortran style) indexing: Starting index is 1. [in] ldb Leading dimension of two dimensional array b[]. (ldb >= n) [in] b[] Array b[lb] (lb >= n*nrhs) Matrix B. [in] beta Scalar β. [in] ldc Leading dimension of two dimensional array c[]. (ldc >= m) [in,out] c[] Array c[lc] (lc >= m*nrhs) [in] Input matrix C (If beta is supplied as zero, c[] needs not be set on input). [out] Output matrix (= αAB + βC). [out] info = 0: Successful exit. = i < 0: The (-i)-th argument is invalid.