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(cl::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.
Throws
This routine shall throw the following exceptions if the associated condition is detected. An implementation may throw additional implementation-specific exception(s) in case of error conditions not covered here.
oneapi::mkl::unsupported_device
oneapi::mkl::lapack::invalid_argument
Exception is thrown in case of incorrect supplied argument value. Position of wrong argument can be determined by 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