NAME

       asum - asum: sum | real( x_i ) | + | imag( x_i ) |

SYNOPSIS

   Functions
       double precision function dasum (n, dx, incx)
           DASUM
       double precision function dzasum (n, zx, incx)
           DZASUM
       real function sasum (n, sx, incx)
           SASUM
       real function scasum (n, cx, incx)
           SCASUM

Detailed Description

Function Documentation

   double precision function dasum (integer n, double precision, dimension(*) dx, integer incx)
       DASUM

       Purpose:

               DASUM takes the sum of the absolute values.

       Parameters
           N

                     N is INTEGER
                    number of elements in input vector(s)

           DX

                     DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

           INCX

                     INCX is INTEGER
                    storage spacing between elements of DX

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

                jack dongarra, linpack, 3/11/78.
                modified 3/93 to return if incx .le. 0.
                modified 12/3/93, array(1) declarations changed to array(*)

   double precision function dzasum (integer n, complex*16, dimension(*) zx, integer incx)
       DZASUM

       Purpose:

               DZASUM takes the sum of the (|Re(.)| + |Im(.)|)'s of a complex vector and
               returns a double precision result.

       Parameters
           N

                     N is INTEGER
                    number of elements in input vector(s)

           ZX

                     ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

           INCX

                     INCX is INTEGER
                    storage spacing between elements of ZX

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

                jack dongarra, 3/11/78.
                modified 3/93 to return if incx .le. 0.
                modified 12/3/93, array(1) declarations changed to array(*)

   real function sasum (integer n, real, dimension(*) sx, integer incx)
       SASUM

       Purpose:

               SASUM takes the sum of the absolute values.
               uses unrolled loops for increment equal to one.

       Parameters
           N

                     N is INTEGER
                    number of elements in input vector(s)

           SX

                     SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

           INCX

                     INCX is INTEGER
                    storage spacing between elements of SX

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

                jack dongarra, linpack, 3/11/78.
                modified 3/93 to return if incx .le. 0.
                modified 12/3/93, array(1) declarations changed to array(*)

   real function scasum (integer n, complex, dimension(*) cx, integer incx)
       SCASUM

       Purpose:

               SCASUM takes the sum of the (|Re(.)| + |Im(.)|)'s of a complex vector and
               returns a single precision result.

       Parameters
           N

                     N is INTEGER
                    number of elements in input vector(s)

           CX

                     CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

           INCX

                     INCX is INTEGER
                    storage spacing between elements of SX

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

                jack dongarra, linpack, 3/11/78.
                modified 3/93 to return if incx .le. 0.
                modified 12/3/93, array(1) declarations changed to array(*)

Author

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