sdsdot#

Computes a vector-vector dot product with double precision.

Description#

The sdsdot routines perform a dot product between two vectors with double precision. The operation is defined as:

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

sdsdot (Buffer Version)#

Syntax#

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

Input Parameters#

queue

The queue where the routine should be executed.

n

Number of elements in vectors x and y.

sb

Single precision scalar to be added to the dot product.

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

incy

Stride of vector y.

Output Parameters#

result

Buffer where the result (a scalar) will be stored. If n < 0 the result is sb.

sdsdot (USM Version)#

Syntax#

namespace oneapi::mkl::blas::column_major {
    sycl::event sdsdot(sycl::queue &queue,
                       std::int64_t n,
                       float sb,
                       const float *x,
                       std::int64_t incx,
                       const float *y,
                       std::int64_t incy,
                       float *result,
                       const std::vector<sycl::event> &dependencies = {})
}
namespace oneapi::mkl::blas::row_major {
    sycl::event sdsdot(sycl::queue &queue,
                       std::int64_t n,
                       float sb,
                       const float *x,
                       std::int64_t incx,
                       const float *y,
                       std::int64_t incy,
                       float *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.

sb

Single precision scalar to be added to the dot product.

x

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

incx

Stride of vector x.

y

Pointer to the input vector y. Size of the array 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) will be stored. If n < 0 the result is sb.

Return Values#

Output event to wait on to ensure computation is complete.