asum¶
Computes the sum of magnitudes of the vector elements.
Syntax
-
void
asum(queue &exec_queue, std::int64_t n, buffer<T, 1> &x, std::int64_t incx, buffer<T_res, 1> &result)¶
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 |
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.
Input Parameters
- exec_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).