Visible to Intel only — GUID: GUID-B8EC3A0E-4876-43C5-9182-9DA7A07F329D
Visible to Intel only — GUID: GUID-B8EC3A0E-4876-43C5-9182-9DA7A07F329D
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:
x is a vector with n elements
asum supports the following precisions:
T |
Tres |
---|---|
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<Tres,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<Tres,1> &result)
}
Input Parameters
- queue
-
The queue where the routine should be executed.
- n
-
Number of elements in vector x.
- x
-
Buffer holding input vector x. Size of the buffer must be at least (1 + (n - 1)*abs(incx)). See Matrix Storage for more details.
- incx
-
Stride of vector x.
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,
Tres *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,
Tres *result,
const std::vector<sycl::event> &dependencies = {})
}
Input Parameters
- queue
-
The queue where the routine should be executed.
- n
-
Number of elements in vector x.
- x
-
Pointer to input vector x. Size of the array holding vector x must be 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 where the scalar result is stored.
Return Values
Output event to wait on to ensure computation is complete.