asum

oneMKL - Data Parallel C++ Developer Reference

Download PDF

ID 772045

Date 3/22/2024

Version

Public

A newer version of this document is available. Customers should click here to go to the newest version.

Visible to Intel only — GUID: GUID-E95D856F-A6BE-42F2-8099-365BA19068F5

View Details

asum

Computes the sum of magnitudes of the vector elements.

Description

The asum routine computes the sum of the magnitudes of elements of a real vector, or the sum of magnitudes of the real and imaginary parts of elements of a complex vector. The operation is defined as:

where:

x is a vector with n elements

asum supports the following precisions:

T	Tres
`float`	`float`
`double`	`double`
`std::complex<float>`	`float`
`std::complex<double>`	`double`

asum (Buffer Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    void asum(sycl::queue &queue,
              std::int64_t n,
              sycl::buffer<T,1> &x,
              std::int64_t incx,
              sycl::buffer<Tres,1> &result)
}

namespace oneapi::mkl::blas::row_major {
    void asum(sycl::queue &queue,
              std::int64_t n,
              sycl::buffer<T,1> &x,
              std::int64_t incx,
              sycl::buffer<Tres,1> &result)
}

Input Parameters

queue: The queue where the routine should be executed.
n: Number of elements in vector x.
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.

Output Parameters

result: Buffer where the scalar result is stored.

asum (USM Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    sycl::event asum(sycl::queue &queue,
                     std::int64_t n,
                     const T *x,
                     std::int64_t incx,
                     Tres *result,
                     const std::vector<sycl::event> &dependencies = {})
}

namespace oneapi::mkl::blas::row_major {
    sycl::event asum(sycl::queue &queue,
                     std::int64_t n,
                     const T *x,
                     std::int64_t incx,
                     Tres *result,
                     const std::vector<sycl::event> &dependencies = {})
}

Input Parameters

queue: The queue where the routine should be executed.
n: Number of elements in vector x.
x: Pointer to input vector x. Size of the array holding vector x must be least (1 + (n - 1)*abs(incx)). See Matrix Storage for more details.
incx: Stride of vector x.
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 scalar result is stored.

Return Values

Output event to wait on to ensure computation is complete.

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in

oneMKL - Data Parallel C++ Developer Reference

asum

Description

asum (Buffer Version)

asum (USM Version)