JCublasJava/src/main/java/jcuda/jcublas/JCublas.java
public static void cublasCswap(int n, Pointer x, int incx, Pointer y, int incy)
    {
        cublasCswapNative(n, x, incx, y, incy);
        checkResultBLAS();
    }
public static void cublasCswap(int n, Pointer x, int incx, Pointer y, int incy)
    {
        cublasCswapNative(n, x, incx, y, incy);
        checkResultBLAS();
    }
<pre>
void
cublasCswap (int n, const cuComplex *x, int incx, cuComplex *y, int incy)

interchanges the single-complex vector x with the single-complex vector y.
For i = 0 to n-1, interchanges x[lx + i * incx] with y[ly + i * incy], where
lx = 1 if incx >= 0, else lx = 1 + (1 - n) * incx, and ly is defined in a
similar way using incy.

Input
-----
n      number of elements in input vectors
x      single-complex vector with n elements
incx   storage spacing between elements of x
y      single-complex vector with n elements
incy   storage spacing between elements of y

Output
------
x      contains-single complex vector y
y      contains-single complex vector x

Reference: http://www.netlib.org/blas/cswap.f

Error status for this function can be retrieved via cublasGetError().

Error Status
------------
CUBLAS_STATUS_NOT_INITIALIZED  if CUBLAS library has not been initialized
CUBLAS_STATUS_EXECUTION_FAILED if function failed to launch on GPU
</pre>