asum
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. The operation is defined as:
where:
- xis a vector withnelements
asum
supports the following precisions:T | T_res |
---|---|
float | float |
double | double |
std::complex<float> | float |
std::complex<double> | double |
asum (Buffer Version)
Syntax
namespace oneapi::mkl::blas::column_major {
void asum(sycl::queue &queue,
std::int64_t n,
sycl::buffer<T,1> &x,
std::int64_t incx,
sycl::buffer<T_res,1> &result)
}
namespace oneapi::mkl::blas::row_major {
void 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 vectorx.
- x
- Buffer holding input vectorx. Size of the buffer must be at least (1 + (n- 1)*abs(incx)). See Matrix Storage for more details.
- incx
- Stride of vectorx.
Output Parameters
- result
- Buffer where the scalar result is stored.
asum (USM Version)
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 std::vector<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 std::vector<sycl::event> &dependencies = {})
}
Input Parameters
- queue
- The queue where the routine should be executed.
- n
- Number of elements in vectorx.
- x
- Pointer to input vectorx. Size of the array holding vectorxmust be least (1 + (n- 1)*abs(incx)). See Matrix Storage for more details.
- incx
- Stride of vectorx.
- dependencies
- List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies.
Output Parameters
- result
- Pointer to where the scalar result is stored.
Return Values
Output event to wait on to ensure computation is complete.