getrs_scratchpad_size

Computes size of scratchpad memory required for getrs function.

getrs_scratchpad_size supports the following precisions.

T
float
double
std::complex<float>
std::complex<double>

Description

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

getrs_scratchpad_size

Syntax

template<typename T>
std::int64_t onemkl::lapack::getrs_scratchpad_size(cl::sycl::queue &queue, onemkl::transpose trans, std::int64_t n, std::int64_t nrhs, std::int64_t lda, std::int64_t ldb)

Input Parameters

queue

Device queue where calculations by getrs function will be performed.

trans

Indicates the form of the equations:

If trans=onemkl::transpose::nontrans, then A*X = B is solved for X.

If trans=onemkl::transpose::trans, then AT*X = B is solved for X.

If trans=onemkl::transpose::conjtrans, then AH*X = B is solved for X.

n

The order of the matrix A(0≤n) and the number of rows in matrix B(0≤n).

nrhs

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

lda

The leading dimension of a.

ldb

The leading dimension of b.

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 getrs function should be able to hold.

Parent topic: LAPACK Linear Equation Routines