ungtr_scratchpad_size¶

Computes size of scratchpad memory required for ungtr function.

ungtr_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 ungtr function should be able to hold. Calls to this routine must specify the template parameter explicitly.

ungtr_scratchpad_size¶

Syntax

template<typename T> std::int64_t onemkl::lapack::ungtr_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 ungtr function will be performed.
upper_lower: Must be uplo::upper or uplo::lower. Uses the same upper_lower as supplied to hetrd.
n: The order of the matrix Q(0≤n).
lda: The leading dimension of a(n≤lda).

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 ungtr function should be able to hold.

Parent topic: LAPACK Singular Value and Eigenvalue Problem Routines