Computes the sum of magnitudes of the vector elements.
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 |
---|---|---|
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.
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.
Stride of vector x.
Buffer where the scalar result is stored (the sum of magnitudes of the real and imaginary parts of all elements of the vector).