.. _onemkl_blas_dotu: dotu ==== Computes the dot product of two complex vectors. .. _onemkl_blas_dotu_description: .. rubric:: Description The dotu routines perform a dot product between two complex vectors: .. math:: result = \sum_{i=1}^{n}X_iY_i dotu supports the following precisions. .. list-table:: :header-rows: 1 * - T * - std::complex * - std::complex .. _onemkl_blas_dotu_buffer: dotu (Buffer Version) --------------------- .. rubric:: Syntax .. code-block:: cpp namespace oneapi::mkl::blas::column_major { void dotu(sycl::queue &queue, std::int64_t n, sycl::buffer &x, std::int64_t incx, sycl::buffer &y, std::int64_t incy, sycl::buffer &result) } .. code-block:: cpp namespace oneapi::mkl::blas::row_major { void dotu(sycl::queue &queue, std::int64_t n, sycl::buffer &x, std::int64_t incx, sycl::buffer &y, std::int64_t incy, sycl::buffer &result) } .. container:: section .. rubric:: Input Parameters queue The queue where the routine should be executed. n Number of elements in vectors x and y. x Buffer holding input vector x. The buffer must be of size at least (1 + (n - 1)*abs(incx)). See :ref:matrix-storage for more details. incx Stride of vector x. y Buffer holding input vector y. The buffer must be of size at least (1 + (n - 1)*abs(incy)). See :ref:matrix-storage for more details. incy Stride of vector y. .. container:: section .. rubric:: Output Parameters result Buffer where the result (a scalar) is stored. .. _onemkl_blas_dotu_usm: dotu (USM Version) ------------------ .. rubric:: Syntax .. code-block:: cpp namespace oneapi::mkl::blas::column_major { sycl::event dotu(sycl::queue &queue, std::int64_t n, const T *x, std::int64_t incx, const T *y, std::int64_t incy, T *result, const std::vector &dependencies = {}) } .. code-block:: cpp namespace oneapi::mkl::blas::row_major { sycl::event dotu(sycl::queue &queue, std::int64_t n, const T *x, std::int64_t incx, const T *y, std::int64_t incy, T *result, const std::vector &dependencies = {}) } .. container:: section .. rubric:: Input Parameters queue The queue where the routine should be executed. n Number of elements in vectors x and y. x Pointer to the input vector x. The array holding input vector x must be of size at least (1 + (n - 1)*abs(incx)). See :ref:matrix-storage for more details. incx Stride of vector x. y Pointer to input vector y. The array holding input vector y must be of size at least (1 + (n - 1)*abs(incy)). See :ref:matrix-storage for more details. incy Stride of vector y. dependencies List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies. .. container:: section .. rubric:: Output Parameters result Pointer to where the result (a scalar) is stored. .. container:: section .. rubric:: Return Values Output event to wait on to ensure computation is complete. **Parent topic:** :ref:blas-level-1-routines