dotc

Computes the dot product of two complex vectors, conjugating the first vector.

Description

\mathrm{res} = \sum_{i-1}^n \mathrm{conjg} (x_i) * y_i

The dotc routines perform a dot product between two complex vectors, conjugating the first of them:

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

API

Syntax

namespace oneapi::mkl::blas::column_major {
    void dotc(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 dotc(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)
}

dotc supports the following precisions and devices:

T

Devices Supported

std::complex<float>

Host, CPU, and GPU

std::complex<double>

Host, CPU, and GPU

Input Parameters

exec_queue

The queue where the routine should be executed.

n

The 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 Matrix Storage for more details.

incx

The stride of vector x.

y

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

incy

The stride of vector y.

Output Parameters

result

The buffer where the result (a scalar) is stored.