Computes size of scratchpad memory required for orgtr function.

Description

orgtr_scratchpad_size supports the following precisions.

T

float

double

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

Syntax

namespace oneapi::mkl::lapack {
template <typename T>
std::int64_t orgtr_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 orgtr function will be performed.

upper_lower

Must be uplo::upper or uplo::lower. Uses the same upper_lower as supplied to sytrd.

n

The order of the matrix $$Q$$ $$(0 \le n)$$.

lda

The leading dimension of a $$(n \le \text{lda})$$.

Return Value

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