asum (USM Version)¶
Computes the sum of magnitudes of the vector elements.
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.
API¶
Syntax¶
namespace oneapi::mkl::blas::column_major {
sycl::event 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 = {})
}
namespace oneapi::mkl::blas::row_major {
sycl::event 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 = {})
}
The USM version of asum
supports the following precisions and devices.
T |
T_res |
Devices Supported |
---|---|---|
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
Input Parameters¶
- exec_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 vectorx
must be of size 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 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.