Visible to Intel only — GUID: GUID-62847DA6-F2CA-46DE-9E86-B686AD8FF9F3
Visible to Intel only — GUID: GUID-62847DA6-F2CA-46DE-9E86-B686AD8FF9F3
nrm2
Computes the Euclidean norm of a vector.
Description
The nrm2 routines compute Euclidean norm of a vector. The operation is defined as:
where:
x is a vector of n elements
nrm2 supports the following precisions:
T |
Tres |
---|---|
sycl::half |
sycl::half |
oneapi::mkl::bfloat16 |
oneapi::mkl::bfloat16 |
float |
float |
double |
double |
std::complex<float> |
float |
std::complex<double> |
double |
nrm2 (Buffer Version)
Syntax
namespace oneapi::mkl::blas::column_major {
void nrm2(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 nrm2(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 Euclidean norm of the vector x is stored.
nrm2 (USM Version)
Syntax
namespace oneapi::mkl::blas::column_major {
sycl::event nrm2(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 nrm2(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 input vector x must be at 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 Euclidean norm of the vector x is stored.
Return Values
Output event to wait on to ensure computation is complete.