      DOUBLE PRECISION FUNCTION DASUM( N, SX, INCX )
****************************************************************************
*                                                                          *
*   DATA PARALLEL BLAS based on MPL                                        *
*                                                                          *
*   Version 1.0   1/9-92 ,                                                 *
*   For MasPar MP-1 computers                                              *
*                                                                          *
*   para//ab, University of Bergen, NORWAY                                 *
*                                                                          *
*   These programs must be called using F90 style array syntax.            *
*   Note that the F77 style calling sequence has been retained             *
*   in this version for compatibility reasons, be aware that               *
*   parameters related to the array dimensions and shape therefore may     *
*   be redundant and without any influence.                                *
*   The calling sequence may be changed in a future version.               *
*   Please report any BUGs, ideas for improvement or other                 *
*   comments to                                                            *
*                    adm@parallab.uib.no                                   *
*                                                                          *
*   Future versions may then reflect your suggestions.                     *
*   The most current version of this software is available                 *
*   from netlib@nac.no , send the message `send index from maspar'         *
*                                                                          *
*   REVISIONS:                                                             *
*                                                                          *
****************************************************************************
      implicit none
*
*     takes the sum of the absolute values.
*     uses unrolled loops for increment equal to one.
*     jack dongarra, linpack, 3/11/78.
*
*     .. Scalar Arguments ..
      INTEGER                          INCX, N
*     ..
*     .. Array Arguments ..
      DOUBLE PRECISION, array(:) :: sx
*     ..
*     .. Local Scalars ..
      INTEGER                          jx
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC                        ABS, sum
*     ..
*     .. Executable Statements ..
*
      DASUM = 0.0D0
      IF( N.LE.0 ) return
*
      jx = abs(incx)
      IF( jX.EQ.1 ) then
*
*        code for increment equal to 1
*
        dasum = sum ( abs(sx(1:n)), 1 )
      else
*
*        code for increment not equal to 1
*
        dasum = sum ( abs(sx(1:jx*(n-1)+1:jx)), 1 )
      endif
*
      RETURN
*
*     End of DASUM .
*
      END