rot

oneMKL - Data Parallel C++ Developer Reference

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ID 772045

Date 10/31/2024

Version

Public

Visible to Intel only — GUID: GUID-4370165C-CBCD-468C-847D-366D0EE5E114

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rot

Performs rotation of points in the plane.

Description

Given two vectors x and y of n elements, the rot routines compute four scalar-vector products and update the input vectors with the sum of two of these scalar-vector products. The operation is defined as:

If s is a complex type, the operation is defined as:

rot supports the following precisions:

T	Tc	Ts
`sycl::half`	`sycl::half`	`sycl::half`
`oneapi::mkl::bfloat16`	`oneapi::mkl::bfloat16`	`oneapi::mkl::bfloat16`
`float`	`float`	`float`
`double`	`double`	`double`
`std::complex<float>`	`float`	`std::complex<float>`
`std::complex<double>`	`double`	`std::complex<double>`
`std::complex<float>`	`float`	`float`
`std::complex<double>`	`double`	`double`

rot (Buffer Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    void rot(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,
             Tc c,
             Ts s)
}

namespace oneapi::mkl::blas::row_major {
    void rot(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,
             Tc c,
             Ts s)
}

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.
y: Buffer holding input vector y. Size of the buffer must be at least (1 + (n - 1)*abs(incy)). See Matrix Storage for more details.
incy: Stride of vector y.
c: Scaling factor.
s: Scaling factor.

Output Parameters

x: Buffer holding updated buffer x.
y: Buffer holding updated buffer y.

rot (USM Version)

Syntax

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

namespace oneapi::mkl::blas::row_major {
    sycl::event rot(sycl::queue &queue,
                    std::int64_t n,
                    T *x,
                    std::int64_t incx,
                    T *y,
                    std::int64_t incy,
                    oneapi::mkl::value_or_pointer<Tc> c,
                    oneapi::mkl::value_or_pointer<Ts> s,
                    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 input vector x must be at least (1 + (n - 1)*abs(incx)). See Matrix Storage for more details.
incx: Stride of vector x.
y: Pointer to input vector y. Size of the array holding input vector y must be at least (1 + (n - 1)*abs(incy)). See Matrix Storage for more details.
incy: Stride of vector y.
c: Scaling factor. See Scalar Arguments for more information on the value_or_pointer data type.
s: Scaling factor. See Scalar Arguments for more information on the value_or_pointer data type.
dependencies: List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies.

Output Parameters

x: Pointer to updated vector x.
y: Pointer to updated vector y.

Return Values

Output event to wait on to ensure computation is complete.

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oneMKL - Data Parallel C++ Developer Reference

rot

Description

rot (Buffer Version)

rot (USM Version)