JCublasJava/src/main/java/jcuda/jcublas/JCublas.java
public static float cublasSdot(int n, Pointer x, int incx, Pointer y, int incy)
    {
        float result = cublasSdotNative(n, x, incx, y, incy);
        checkResultBLAS();
        return result;
    }
public static float cublasSdot(int n, Pointer x, int incx, Pointer y, int incy)
    {
        float result = cublasSdotNative(n, x, incx, y, incy);
        checkResultBLAS();
        return result;
    }
<pre>
float
cublasSdot (int n, const float *x, int incx, const float *y, int incy)

computes the dot product of two single precision vectors. It returns the
dot product of the single precision vectors x and y if successful, and
0.0f otherwise. It computes the sum for i = 0 to n - 1 of x[lx + i *
incx] * 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 precision vector with n elements
incx   storage spacing between elements of x
y      single precision vector with n elements
incy   storage spacing between elements of y

Output
------
returns single precision dot product (zero if n <= 0)

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

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

Error Status
------------
CUBLAS_STATUS_NOT_INITIALIZED  if CUBLAS library has nor been initialized
CUBLAS_STATUS_EXECUTION_FAILED if function failed to execute on GPU
</pre>