potri_scratchpad_size

Computes size of scratchpad memory required for potri function.

potri_scratchpad_size supports the following precisions.

T
float
double
std::complex<float>
std::complex<double>

Description

Computes the number of elements of type T the scratchpad memory to be passed to potri function should be able to hold. Calls to this routine must specify the template parameter explicitly.

potri_scratchpad_size

Syntax

template<typename T>
std::int64_t onemkl::lapack::potri_scratchpad_size(cl::sycl::queue &queue, onemkl::uplo upper_lower, std::int64_t n, std::int64_t lda)

Input Parameters

queue

Device queue where calculations by potri function will be performed.

upper_lower

Indicates how the input matrix A has been factored:

If upper_lower = onemkl::uplo::upper, the upper triangle of A is stored.

If upper_lower = onemkl::uplo::lower, the lower triangle of A is stored.

n

Specifies the order of the matrix A(0≤n).

lda

The leading dimension of a.

Throws

onemkl::lapack::exception

Exception is thrown in case of incorrect argument value is supplied. Position of wrong argument can be determined by get_info() method of exception object.

Return Value

The number of elements of type T the scratchpad memory to be passed to potri function should be able to hold.

Parent topic: LAPACK Linear Equation Routines