NAME

       swap - swap: x <=> y

SYNOPSIS

   Functions
       subroutine cswap (n, cx, incx, cy, incy)
           CSWAP
       subroutine dswap (n, dx, incx, dy, incy)
           DSWAP
       subroutine sswap (n, sx, incx, sy, incy)
           SSWAP
       subroutine zswap (n, zx, incx, zy, incy)
           ZSWAP

Detailed Description

Function Documentation

   subroutine cswap (integer n, complex, dimension(*) cx, integer incx, complex, dimension(*) cy,
       integer incy)
       CSWAP

       Purpose:

              CSWAP interchanges two vectors.

       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 CX

           CY

                     CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

           INCY

                     INCY is INTEGER
                    storage spacing between elements of CY

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

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

   subroutine dswap (integer n, double precision, dimension(*) dx, integer incx, double
       precision, dimension(*) dy, integer incy)
       DSWAP

       Purpose:

               DSWAP interchanges two vectors.
               uses unrolled loops for increments equal to 1.

       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

           DY

                     DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

           INCY

                     INCY is INTEGER
                    storage spacing between elements of DY

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

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

   subroutine sswap (integer n, real, dimension(*) sx, integer incx, real, dimension(*) sy,
       integer incy)
       SSWAP

       Purpose:

               SSWAP interchanges two vectors.
               uses unrolled loops for increments equal to 1.

       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

           SY

                     SY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

           INCY

                     INCY is INTEGER
                    storage spacing between elements of SY

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

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

   subroutine zswap (integer n, complex*16, dimension(*) zx, integer incx, complex*16,
       dimension(*) zy, integer incy)
       ZSWAP

       Purpose:

               ZSWAP interchanges two vectors.

       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

           ZY

                     ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

           INCY

                     INCY is INTEGER
                    storage spacing between elements of ZY

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Further Details:

                jack dongarra, 3/11/78.
                modified 12/3/93, array(1) declarations changed to array(*)

Author

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