sdsdot

Intel® oneAPI Math Kernel Library (oneMKL) - Data Parallel C++ Developer Reference

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ID 772045

Date 12/16/2022

Version

Public

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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:

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 ref: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 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.

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 ref: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 ref: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.

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Intel® oneAPI Math Kernel Library (oneMKL) - Data Parallel C++ Developer Reference

sdsdot

Description

sdsdot (Buffer Version)

sdsdot (USM Version)