NAME

coomm, scoomm, dcoomm, ccoomm, zcoomm - coordinate matrix-matrix multiply

SYNOPSIS

  SUBROUTINE SCOOMM( TRANSA, M, N, K, ALPHA, DESCRA,
 *           VAL, INDX, JNDX, NNZ,
 *           B, LDB, BETA, C, LDC, WORK, LWORK )
  INTEGER*4  TRANSA, M, N, K, DESCRA(5), NNZ
 *           LDB, LDC, LWORK
  INTEGER*4  INDX(NNZ), JNDX(NNZ)
  REAL*4     ALPHA, BETA
  REAL*4     VAL(NNZ), B(LDB,*), C(LDC,*), WORK(LWORK)

  SUBROUTINE DCOOMM( TRANSA, M, N, K, ALPHA, DESCRA,
 *           VAL, INDX, JNDX, NNZ,
 *           B, LDB, BETA, C, LDC, WORK, LWORK)
  INTEGER*4  TRANSA, M, N, K, DESCRA(5), NNZ
 *           LDB, LDC, LWORK
  INTEGER*4  INDX(NNZ), JNDX(NNZ)
  REAL*8     ALPHA, BETA
  REAL*8     VAL(NNZ), B(LDB,*), C(LDC,*), WORK(LWORK)


  SUBROUTINE CCOOMM( TRANSA, M, N, K, ALPHA, DESCRA,
 *           VAL, INDX, JNDX, NNZ,
 *           B, LDB, BETA, C, LDC, WORK, LWORK )
  INTEGER*4  TRANSA, M, N, K, DESCRA(5), NNZ
 *           LDB, LDC, LWORK
  INTEGER*4  INDX(NNZ), JNDX(NNZ)
  COMPLEX*8  ALPHA, BETA
  COMPLEX*8  VAL(NNZ), B(LDB,*), C(LDC,*), WORK(LWORK)

  SUBROUTINE ZCOOMM( TRANSA, M, N, K, ALPHA, DESCRA,
 *           VAL, INDX, JNDX, NNZ,
 *           B, LDB, BETA, C, LDC, WORK, LWORK)
  INTEGER*4  TRANSA, M, N, K, DESCRA(5), NNZ
 *           LDB, LDC, LWORK
  INTEGER*4  INDX(NNZ), JNDX(NNZ)
  COMPLEX*16 ALPHA, BETA
  COMPLEX*16 VAL(NNZ), B(LDB,*), C(LDC,*), WORK(LWORK)

DESCRIPTION

          C <- alpha op(A) B + beta C


 where ALPHA and BETA are scalar, C and B are dense matrices,
 A is a matrix represented in coordinate format and    
 op( A )  is one  of

 op( A ) = A   or   op( A ) = A'   or   op( A ) = conjg( A' ).
                                    ( ' indicates matrix transpose)

ARGUMENTS

 TRANSA        Indicates how to operate with the sparse matrix
                 0 : operate with matrix
                 1 : operate with transpose matrix
                 2 : operate with the conjugate transpose of matrix.
                     2 is equivalent to 1 if matrix is real.

 M             Number of rows in matrix A

 N             Number of columns in matrix C

 K             Number of columns in matrix A

 ALPHA         Scalar parameter

 DESCRA()      Descriptor argument.  Five element integer array
               DESCRA(1) matrix structure
                 0 : general
                 1 : symmetric (A=A')
                 2 : Hermitian (A= CONJG(A'))
                 3 : Triangular
                 4 : Skew(Anti)-Symmetric (A=-A')
                 5 : Diagonal
                 6 : Skew-Hermitian (A= -CONJG(A'))
               DESCRA(2) upper/lower triangular indicator 
                 1 : lower
                 2 : upper
               DESCRA(3) main diagonal type 
                 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 NNZ consisting of the
               non-zero entries of A, in any order.

 INDX()        integer array of length NNZ consisting of the
               corresponding row indices of the entries of A.

 JNDX()        integer array of length NNZ consisting of the
               corresponding column indices of the entries of A.

 NNZ           number of non-zero elements in 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. WORK is not
               referenced in the current version.


 LWORK         length of WORK array. LWORK is not referenced
               in the current version.

NAME

SYNOPSIS

DESCRIPTION

ARGUMENTS

SEE ALSO