dswap(3P) Sun Performance Library dswap(3P)NAMEdswap - Exchange vectors x and y.
SYNOPSIS
SUBROUTINE DSWAP(N, X, INCX, Y, INCY)
INTEGER N, INCX, INCY
DOUBLE PRECISION X(*), Y(*)
SUBROUTINE DSWAP_64(N, X, INCX, Y, INCY)
INTEGER*8 N, INCX, INCY
DOUBLE PRECISION X(*), Y(*)
F95 INTERFACE
SUBROUTINE SWAP([N], X, [INCX], Y, [INCY])
INTEGER :: N, INCX, INCY
REAL(8), DIMENSION(:) :: X, Y
SUBROUTINE SWAP_64([N], X, [INCX], Y, [INCY])
INTEGER(8) :: N, INCX, INCY
REAL(8), DIMENSION(:) :: X, Y
C INTERFACE
#include <sunperf.h>
void dswap(int n, double *x, int incx, double *y, int incy);
void dswap_64(long n, double *x, long incx, double *y, long incy);
PURPOSEdswap Exchange x and y where x and y are n-vectors.
ARGUMENTS
N (input)
On entry, N specifies the number of elements in the vector.
N must be at least one for the subroutine to have any visible
effect. Unchanged on exit.
X (input/output)
( 1 + ( n - 1 )*abs( INCX ) ). On entry, the incremented
array X must contain the vector x. On exit, the y vector.
INCX (input)
On entry, INCX specifies the increment for the elements of X.
Unchanged on exit.
Y (input/output)
( 1 + ( n - 1 )*abs( INCY ) ). On entry, the incremented
array Y must contain the vector y. On exit, the x vector.
INCY (input)
On entry, INCY specifies the increment for the elements of Y.
Unchanged on exit.
6 Mar 2009 dswap(3P)
