code: def cublasSspmv(handle, uplo, n, alpha, AP, x, incx, beta, y, incy):
      
  
      status = _libcublas.cublasSspmv_v2(handle,
                                         _CUBLAS_FILL_MODE[uplo], 
                                         n,
                                         ctypes.byref(ctypes.c_float(alpha)),
                                         ctypes.byref(ctypes.c_float(AP)),
                                         int(x),
                                         incx,
                                         ctypes.byref(ctypes.c_float(beta)),
                                         int(y),
                                         incy)
      cublasCheckStatus(status)
docs: Matrix-vector product for real symmetric-packed matrix.