asum¶

Computes the sum of magnitudes of the vector elements.

asum supports the following precisions.

T

T_res

float

float

double

double

std::complex<float>

float

std::complex<double>

double

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:

where x is a vector with n elements.

asum (Buffer Version)¶

Syntax

void onemkl::blas::asum(sycl::queue &queue, std::int64_t n, sycl::buffer<T, 1> &x, std::int64_t incx, sycl::buffer<T_res, 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. The buffer must be of size at least (1 + (n - 1)*abs(incx)). See Matrix and Vector Storage for more details.
incx: Stride of vector x.

Output Parameters

result: Buffer where the scalar result is stored (the sum of magnitudes of the real and imaginary parts of all elements of the vector).

asum (USM Version)¶

Syntax

sycl::event onemkl::blas::asum(sycl::queue &queue, std::int64_t n, const T *x, std::int64_t incx, T_res *result, const sycl::vector_class<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. The array holding the vector x must be of size at least (1 + (n - 1)*abs(incx)). See Matrix and Vector 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 the output matrix where the scalar result is stored (the sum of magnitudes of the real and imaginary parts of all elements of the vector).

Return Values

Output event to wait on to ensure computation is complete.

Parent topic: BLAS Level 1 Routines