PLASMA  2.8.0
PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures
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]transIntended 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]TOn 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]BOn entry, the M-by-NRHS matrix B of right hand side vectors, stored columnwise;
[in]BThe N-by-NRHS matrix of right hand side matrix B.
[out]XIf return value = 0, X is the solution vectors, stored columnwise: if M >= N, rows 1 to N of X 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 X contain the minimum norm solution vectors;
[out]ITERThe number of the current iteration in the iterative refinement process
Returns
Return values
PLASMA_SUCCESSsuccessful exit
See also
PLASMA_zcungesv
PLASMA_zcungesv_Tile_Async
PLASMA_dsungesv_Tile
PLASMA_zgels_Tile