sdsdot#

Computes a vector-vector dot product with double precision.

Description

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

\[result = sb + \sum_{i=1}^{n}X_iY_i\]

sdsdot (Buffer Version)#

Syntax

namespace oneapi::math::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::math::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. The buffer must be of size 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 be of size 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.

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::math::invalid_argument

oneapi::math::unsupported_device

oneapi::math::host_bad_alloc

oneapi::math::device_bad_alloc

oneapi::math::unimplemented

sdsdot (USM Version)#

Syntax

namespace oneapi::math::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::math::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 the input vector x. The array must be of size 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. The array must be of size at least (1 + (n - 1)*abs(incxy)). 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.