swap: x <=> y

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