NAME

SYNOPSIS

  SUBROUTINE SBCOMM( TRANSA, MB, N, KB, ALPHA, DESCRA,
 *           VAL, BINDX, BJNDX, BNNZ, LB,
 *           B, LDB, BETA, C, LDC, WORK, LWORK )
  INTEGER*4  TRANSA, MB, N, KB, DESCRA(5), BNNZ, LB,
 *           LDB, LDC, LWORK
  INTEGER*4  BINDX(BNNZ), BJNDX(BNNZ)
  REAL*4     ALPHA, BETA
  REAL*4     VAL(LB*LB*BNNZ), B(LDB,*), C(LDC,*), WORK(LWORK)
  SUBROUTINE DBCOMM( TRANSA, MB, N, KB, ALPHA, DESCRA,
 *           VAL, BINDX, BJNDX, BNNZ, LB,
 *           B, LDB, BETA, C, LDC, WORK, LWORK)
  INTEGER*4  TRANSA, MB, N, KB, DESCRA(5), BNNZ, LB,
 *           LDB, LDC, LWORK
  INTEGER*4  BINDX(BNNZ), BJNDX(BNNZ)
  REAL*8     ALPHA, BETA
  REAL*8     VAL(LB*LB*BNNZ), B(LDB,*), C(LDC,*), WORK(LWORK)

DESCRIPTION

 C <- alpha A B + beta C
 C <- alpha A'B + beta C
                                    ( ' indicates matrix transpose)

ARGUMENTS

 TRANSA        Indicates how to operate with the sparse matrix
                 0 : operate with matrix
                 1 : operate with transpose matrix
 MB            Number of block rows in matrix A
 N             Number of columns in matrix C
 KB            Number of block columns in matrix A
 ALPHA         Scalar parameter
 DESCRA()      Descriptor argument.  Five element integer array
               DESCRA(1) matrix structure
                 0 : general
                 1 : symmetric
                 2 : Hermitian
                 3 : Triangular
                 4 : Skew(Anti)-Symmetric
                 5 : Diagonal
               DESCRA(2) upper/lower triangular indicator (NOT IMPLEMENTED)
                 1 : lower
                 2 : upper
               DESCRA(3) main diagonal type (NOT IMPLEMENTED)
                 0 : non-unit
                 1 : unit
               DESCRA(4) Array base  (NOT IMPLEMENTED)
                 0 : C/C++ compatible
                 1 : Fortran compatible
               DESCRA(5) repeated indices? (NOT IMPLEMENTED)
                 0 : unknown
                 1 : no repeated indices
 VAL()         scalar array of length LB*LB*BNNZ containing
               matrix entries stored column-major within each
               dense block.
 BINDX()       integer array of length BNNZ consisting of the
               block row indices of the block entries of A.
 BJNDX()       integer array of length BNNZ consisting of the
               block column indices of the block entries of A.
 BNNZ          number of block entries
 LB            dimension of dense blocks composing A.
 B()           rectangular array with first dimension LDB.
 LDB           leading dimension of B
 BETA          Scalar parameter
 C()           rectangular array with first dimension LDC.
 LDC           leading dimension of C
 WORK()        scratch array of length LWORK.  LWORK should be at least
               MAX(MB*LB*LB,N).
 LWORK         length of WORK array

SEE ALSO

http://math.nist.gov/mcsd/Staff/KRemington/fspblas/

NOTES/BUGS