Contents

dotc

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

Description

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

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

dotc supports the following precisions for data.

T

std::complex<float>

std::complex<double>

dotc (Buffer Version)

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)
}

Input Parameters

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.

Throws

This routine shall throw the following exceptions if the associated condition is detected. An implementation may throw additional implementation-specific exception(s) in case of error conditions not covered here.

oneapi::mkl::invalid_argument

oneapi::mkl::unsupported_device

oneapi::mkl::host_bad_alloc

oneapi::mkl::device_bad_alloc

oneapi::mkl::unimplemented

dotc (USM Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    void dotc(sycl::queue &queue,
              std::int64_t n,
              const T *x,
              std::int64_t incx,
              const T *y,
              std::int64_t incy,
              T *result,
              const sycl::vector_class<sycl::event> &dependencies = {})
}

namespace oneapi::mkl::blas::row_major {
    void dotc(sycl::queue &queue,
              std::int64_t n,
              const T *x,
              std::int64_t incx,
              const T *y,
              std::int64_t incy,
              T *result,
              const sycl::vector_class<sycl::event> &dependencies = {})
}

Input Parameters

queue

The queue where the routine should be executed.

n

The number of elements in vectors x and y.

x

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

incx

The stride of vector x.

y

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

incy

The 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

The pointer to where the result (a scalar) is stored.

Return Values

Output event to wait on to ensure computation is complete.

Throws

This routine shall throw the following exceptions if the associated condition is detected. An implementation may throw additional implementation-specific exception(s) in case of error conditions not covered here.

oneapi::mkl::invalid_argument

oneapi::mkl::unsupported_device

oneapi::mkl::host_bad_alloc

oneapi::mkl::device_bad_alloc

oneapi::mkl::unimplemented

Parent topic: BLAS Level 1 Routines

sdsdot dotu