sdsdot

Computes a vector-vector dot product with double precision.

Description

The sdsdot routines perform a dot product between two vectors with double precision:

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

API

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)
}

sdsdot supports the Host, CPU, and GPU devices.

Input Parameters

exec_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. The buffer must be of size at least (1 + (n - 1)*abs(incx)). See ref:matrix-storage for more details.

incx

Stride of vector x.

y

Buffer holding input vector y. The buffer must be of size at least (1 + (n - 1)*abs(incxy)). See ref: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.