Computes the sum of magnitudes of the vector elements.
event asum(queue &exec_queue, std::int64_t n, const T *x, std::int64_t incx, T_res *result, const vector_class<event> &dependencies = {});
The USM version of asum supports the following precisions and devices.
T | T_res | Devices Supported |
---|---|---|
float | float | Host, CPU, and GPU |
double | double | Host, CPU, and GPU |
std::complex<float> | float | Host, CPU, and GPU |
std::complex<double> | double | Host, CPU, and GPU |
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.
The queue where the routine should be executed.
Number of elements in vector 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.
Stride of vector x.
List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies.
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).
Output event to wait on to ensure computation is complete.