swap

oneMKL - Data Parallel C++ Developer Reference

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ID 772045

Date 3/31/2021

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Public

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swap

Swaps a vector with another vector.

Description

Given two vectors of n elements, x and y, the swap routines return vectors y and x swapped, each replacing the other. The operation is defined as:

swap supports the following precisions:

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

swap (Buffer Version)

Syntax

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

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

Input Parameters

queue: The queue where the routine should be executed.
n: Number of elements in vectors x and y.
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(incy)). See ref:matrix-storage for more details.
incy: Stride of vector y.

Output Parameters

x: Buffer holding updated buffer x, that is, the input vector y.
y: Buffer holding updated buffer y, that is, the input vector x.

swap (USM Version)

Syntax

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

namespace oneapi::mkl::blas::row_major {
    sycl::event swap(sycl::queue &queue,
                     std::int64_t n,
                     T *x,
                     std::int64_t incx,
                     T *y,
                     std::int64_t incy,
                     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.
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 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

x: Pointer to updated array x, that is, the input vector y.
y: Pointer to updated array y, that is, the input vector x.

Return Values

Output event to wait on to ensure computation is complete.

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oneMKL - Data Parallel C++ Developer Reference

swap

Description

swap (Buffer Version)

swap (USM Version)