block_apply_packed_Q_cl()

void stan::math::internal::block_apply_packed_Q_cl ( const matrix_cl< double > &  packed_cl, matrix_cl< double > &  A, const int  r = 200  )

inline

Calculates Q*A in-place.

To construct Q pass an appropriate identity matrix as input A.

Parameters

	packed_cl	Packed result of tridiagonalization that contains householder vectors that define Q in columns bellow the diagonal. Usually result of a call to block_householder_tridiag_cl.
[in,out]	A	On input a matrix to multiply with Q. On output the product Q*A.
	r	Block size. Affects only performance of the algorithm. Optimal value depends on the size of A and cache of the processor. For larger matrices or larger cache sizes a larger value is optimal.

Definition at line 100 of file tridiagonalization.hpp.