int PLASMA_zcungesv_Tile ( PLASMA_enum  trans,
PLASMA_desc *  A,
PLASMA_desc *  T,
PLASMA_desc *  B,
PLASMA_desc *  X,
int *  ITER 
)

PLASMA_zcungesv_Tile - Solves symmetric linear system of equations using the tile QR or the tile LQ factorization and mixed-precision iterative refinement. Tile equivalent of PLASMA_zcungesv(). Operates on matrices stored by tiles. All matrices are passed through descriptors. All dimensions are taken from the descriptors.

Parameters:
[in] trans Intended usage: = PlasmaNoTrans: the linear system involves A; = PlasmaConjTrans: the linear system involves A**H. Currently only PlasmaNoTrans is supported.
[in,out] A 
  • If the iterative refinement converged, A is not modified;
  • otherwise, it fell back to double precision solution, and on exit the M-by-N matrix A contains: if M >= N, A is overwritten by details of its QR factorization as returned by PLASMA_zgeqrf; if M < N, A is overwritten by details of its LQ factorization as returned by PLASMA_zgelqf.
[out] T On exit:

  • if the iterative refinement converged, T is not modified;
  • otherwise, it fell back to double precision solution, and then T is an auxiliary factorization data.
[in,out] B On entry, the M-by-NRHS matrix B of right hand side vectors, stored columnwise; On exit, if return value = 0, B is overwritten by the solution vectors, stored columnwise: if M >= N, rows 1 to N of B contain the least squares solution vectors; the residual sum of squares for the solution in each column is given by the sum of squares of the modulus of elements N+1 to M in that column; if M < N, rows 1 to N of B contain the minimum norm solution vectors;
Returns:
Return values:
PLASMA_SUCCESS successful exit
See also:
PLASMA_zcungesv
PLASMA_zcungesv_Tile_Async
PLASMA_dsungesv_Tile
PLASMA_zgels_Tile
 All Data Structures
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