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swap(3) LAPACK swap(3)

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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