Visible to Intel only — GUID: GUID-9AE25F8E-F0D5-44FF-B444-7DB3577E119B
Visible to Intel only — GUID: GUID-9AE25F8E-F0D5-44FF-B444-7DB3577E119B
rotg
Computes the parameters for a Givens rotation.
Description
Given the Cartesian coordinates (a, b) of a point, the rotg routines return the parameters c, s, r, and z associated with the Givens rotation. The parameters c and s define a unitary matrix such that:
The parameter z is defined such that if |a| > |b|, z is s; otherwise if c is not 0 z is 1/c; otherwise z is 1.
rotg supports the following precisions:
T |
Tc |
---|---|
float |
float |
double |
double |
std::complex<float> |
float |
std::complex<double> |
double |
rotg (Buffer Version)
Syntax
namespace oneapi::mkl::blas::column_major { void rotg(sycl::queue &queue, sycl::buffer<T,1> &a, sycl::buffer<T,1> &b, sycl::buffer<Tc,1> &c, sycl::buffer<T,1> &s) }
namespace oneapi::mkl::blas::row_major { void rotg(sycl::queue &queue, sycl::buffer<T,1> &a, sycl::buffer<T,1> &b, sycl::buffer<Tc,1> &c, sycl::buffer<T,1> &s) }
Input Parameters
- queue
-
The queue where the routine should be executed
- a
-
Buffer holding x-coordinate of the point.
- b
-
Buffer holding y-coordinate of the point.
Output Parameters
- a
-
Buffer holding parameter r associated with the Givens rotation.
- b
-
Buffer holding parameter z associated with the Givens rotation.
- c
-
Buffer holding parameter c associated with the Givens rotation.
- s
-
Buffer holding parameter s associated with the Givens rotation.
rotg (USM Version)
Syntax
namespace oneapi::mkl::blas::column_major { sycl::event rotg(sycl::queue &queue, T *a, T *b, Tc *c, T *s, const std::vector<sycl::event> &dependencies = {}) }
namespace oneapi::mkl::blas::row_major { sycl::event rotg(sycl::queue &queue, T *a, T *b, Tc *c, T *s, const std::vector<sycl::event> &dependencies = {}) }
Input Parameters
- queue
-
The queue where the routine should be executed
- a
-
Pointer to x-coordinate of the point.
- b
-
Pointer to y-coordinate of the point.
- dependencies
-
List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies.
Output Parameters
- a
-
Pointer to parameter r associated with the Givens rotation.
- b
-
Pointer to parameter z associated with the Givens rotation.
- c
-
Pointer to parameter c associated with the Givens rotation.
- s
-
Pointer to parameter s associated with the Givens rotation.
Return Values
Output event to wait on to ensure computation is complete.