dotu#

Computes the dot product of two complex vectors.

Description#

The dotu routines perform a dot product between two complex vectors. The operation is defined as:

\[\mathrm{result} = \sum_{i=1}^n X_i Y_i\]

dotu supports the following precisions:

T

std::complex<float>

std::complex<double>

dotu (Buffer Version)#

Syntax#

namespace oneapi::mkl::blas::column_major {
    void dotu(sycl::queue &queue,
              std::int64_t n,
              sycl::buffer<T,1> &x,
              std::int64_t incx,
              sycl::buffer<T,1> &y,
              std::int64_t incy,
              sycl::buffer<T,1> &result)
}
namespace oneapi::mkl::blas::row_major {
    void dotu(sycl::queue &queue,
              std::int64_t n,
              sycl::buffer<T,1> &x,
              std::int64_t incx,
              sycl::buffer<T,1> &y,
              std::int64_t incy,
              sycl::buffer<T,1> &result)
}

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. Size of the buffer must be at least (1 + (n - 1)*abs(incx)). See Matrix Storage for more details.

incx

Stride of vector x.

y

Buffer holding input vector y. The buffer must have size at least (1 + (n - 1)*abs(incy)). See Matrix Storage for more details.

incy

Stride of vector y.

Output Parameters#

result

Buffer where the result (a scalar) is stored.

dotu (USM Version)#

Syntax#

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<sycl::event> &dependencies = {})
}
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<sycl::event> &dependencies = {})
}

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. Size of the array holding input vector x must be at least (1 + (n - 1)*abs(incx)). See Matrix Storage for more details.

incx

Stride of vector x.

y

Pointer to input vector y. Size of the array holding input vector y must be at least (1 + (n - 1)*abs(incy)). See 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.

Output Parameters#

result

Pointer to where the result (a scalar) is stored.

Return Values#

Output event to wait on to ensure computation is complete.