getrs_scratchpad_size

Computes size of scratchpad memory required for getrs function.

Description

getrs_scratchpad_size supports the following precisions.

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

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

namespace oneapi::mkl::lapack {
  template <typename T>
  std::int64_t getrs_scratchpad_size(sycl::queue &queue, oneapi::mkl::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=oneapi::mkl::transpose::nontrans, then \(AX = B\) is solved for \(X\).

If trans=oneapi::mkl::transpose::trans, then \(A^TX = B\) is solved for \(X\).

If trans=oneapi::mkl::transpose::conjtrans, then \(A^HX = B\) is solved for \(X\).

n

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

nrhs

The number of right-hand sides (\(0 \le \text{nrhs}\)).

lda

The leading dimension of a.

ldb

The leading dimension of b.

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