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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.

dotc iamax