potrs_scratchpad_size

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

Syntax

template<typename T>
std::int64_t potrs_scratchpad_size(cl::sycl::queue &queue, mkl::uplo uplo, std::int64_t n, std::int64_t nrhs, std::int64_t lda, std::int64_t ldb)

Description

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

Input Parameters

queue

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

uplo

Indicates how the input matrix has been factored:

If uplo=mkl::uplo::upper, the upper triangle U of A is stored, where A = UT*U for real data, A = UH*U for complex data.

If uplo=mkl::uplo::lower, the upper triangle L of A is stored, where A = L*LT for real data, A = L*LH for complex data.

n

The order of matrix A (0≤n).

nrhs

The number of right-hand sides (0≤nrhs).

lda

The leading dimension of A.

ldb

The leading dimension of B.

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 potrs (buffer or USM version) function should be able to hold.