potrs_scratchpad_size¶
Computes size of scratchpad memory required for potrs function.
Description
potrs_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 potrs function should be able to hold.
Calls to this routine must specify the template parameter explicitly.
potrs_scratchpad_size¶
Syntax
namespace oneapi::mkl::lapack {
template <typename T>
std::int64_t potrs_scratchpad_size(sycl::queue &queue, oneapi::mkl::uplo upper_lower, std::int64_t n, std::int64_t nrhs, std::int64_t lda, std::int64_t ldb)
}
Input Parameters
- queue
Device queue where calculations by potrs function will be performed.
- upper_lower
Indicates how the input matrix has been factored:
If
upper_lower = oneapi::mkl::uplo::upper, the upper triangle \(U\) of \(A\) is stored, where \(A = U^{T}U\) for real data, \(A = U^{H}U\) for complex data.If
upper_lower = oneapi::mkl::uplo::lower, the lower triangle \(L\) of \(A\) is stored, where \(A = LL^{T}\) for real data, \(A = LL^{H}\) for complex data.- n
The order of matrix \(A\) (\(0 \le n\)).
- nrhs
The number of right-hand sides (\(0 \le nrhs\)).
- lda
The leading dimension of
a.- ldb
The leading dimension of
b.
Return Value
The number of elements of type T the scratchpad memory to be passed to potrs function should be able to hold.
Parent topic: LAPACK Linear Equation Routines