ungqr_scratchpad_size

Computes size of scratchpad memory required for ungqr function.

ungqr_scratchpad_size supports the following precisions.

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

Description

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

ungqr_scratchpad_size

Syntax

template<typename T>
std::int64_t onemkl::lapack::ungqr_scratchpad_size(cl::sycl::queue &queue, std::int64_t m, std::int64_t n, std::int64_t k, std::int64_t lda)

Input Parameters

queue

Device queue where calculations by ungqr function will be performed.

m

The number of rows in the matrix A (0≤m).

n

The number of columns the matrix A (0≤n≤m).

k

The number of elementary reflectors whose product defines the matrix Q (0≤k≤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 ungqr function should be able to hold.

Parent topic: LAPACK Linear Equation Routines