sytrf_scratchpad_size#
Computes size of scratchpad memory required for sytrf function.
Description
sytrf_scratchpad_size
supports the following precisions.
T
float
double
std::complex<float>
std::complex<double>
Computes the number of elements of type T
the scratchpad memory to be passed to sytrf function should be able to hold.
Calls to this routine must specify the template parameter
explicitly.
sytrf_scratchpad_size#
Syntax
namespace oneapi::mkl::lapack {
template <typename T>
std::int64_t sytrf_scratchpad_size(sycl::queue &queue, oneapi::mkl::uplo upper_lower, std::int64_t n, std::int64_t lda)
}
Input Parameters
- queue
Device queue where calculations by sytrf function will be performed.
- upper_lower
Indicates whether the upper or lower triangular part of \(A\) is stored and how \(A\) is factored:
If
upper_lower=uplo::upper
, the buffera
stores the upper triangular part of the matrix \(A\), and \(A\) is factored as \(UDU^T\).If
upper_lower=uplo::lower
, the buffera
stores the lower triangular part of the matrix \(A\), and \(A\) is factored as \(LDL^T\)- n
The order of the matrix \(A\) (\(0 \le n\)).
- lda
The leading dimension of
a
.
Return Value
The number of elements of type T
the scratchpad memory to be passed to sytrf function should be able to hold.
Parent topic: LAPACK Linear Equation Routines