ungqr_batch_scratchpad_size (Strided Version)

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

Syntax

std::int64_t ungqr_batch_scratchpad_size(cl::sycl::queue &queue, std::int64_t m, std::int64_t n, std::int64_t k, std::int64_t lda, std::int64_t stride_a, std::int64_t stride_tau, std::int64_t batch_size)

Description

Computes the number of elements of type T the scratchpad memory to be passed to the ungqr_batch (Strided Version) function should be able to hold.

Input Parameters

queue

Device queue where calculations will be performed.

m

The number of rows in the matrices Ai (0 m).

n

The number of columns in the matrices Ai (0 n).

k

the number of elementary reflectors whose product defines the matrices Qi (0 ≤ kn) .

lda

The leading dimension of Ai (ldam).

stride_a

The stride between the beginnings of matrices Ai inside the batch array a.

stride_tau

The stride between the beginnings of arrays taui inside the array tau.

batch_size

Specifies the number of problems in a batch.

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 ungqr_batch (Strided Version) function should be able to hold.