orgbr_scratchpad_size

Computes size of scratchpad memory required for orgbr (USM Version) function. This routine belongs to the oneapi::mkl::lapacknamespace.

Syntax

template<typename T>
std::int64_t orgbr_scratchpad_size(cl::sycl::queue &queue, mkl::generate gen, std::int64_t m, std::int64_t n, std::int64_t k, std::int64_t lda)

Description

Computes the number of elements of type T the scratchpad memory to be passed to the orgbr (buffer or USM version) function should be able to hold.

Input Parameters

queue

Device queue where calculations by the orgbr (buffer or USM version) function will be performed.

gen

Must be generate::q or generate::p.

If gen= generate::q, the routine generates the matrix Q.

If gen= generate::p, the routine generates the matrix PT.

m

The number of rows in the matrix Q or PT to be returned (0≤m).

If gen= generate::q, m ≥ n ≥ min(m, k).

If gen= generate::p, n ≥ m ≥ min(n, k).

n

The number of rows in the matrix Q or PT to be returned (0≤n). See m for constraints.

k

If gen= generate::q, the number of columns in the original m-by-k matrix reduced by gebrd (USM Version).

If gen= generate::p, the number of rows in the original k-by-n matrix reduced by gebrd (USM Version).

lda

The leading dimension of a.

Exceptions

mkl::lapack::exception

This exception is thrown when an incorrect argument value is supplied. You can determine the position of the incorrect argument by the info() method of the exception object.

Return Values

The number of elements of type T the scratchpad memory to be passed to the orgbr (buffer or USM version) function should be able to hold.

orgbr (USM Version) orgqr