PLASMA 2.8.0 PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures

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void CORE_dlaed3_updatevectors | ( | int | op,
|  | int | wsmode,
|  | int | n,
|  | int | n1,
|  | int | K,
|  | int | il_nondef,
|  | int | iu_nondef,
|  | double * | Q,
|  | int | ldq,
|  | double * | Q2,
|  | const int * | ctot,
|  | double * | W,
|  | int | start,
|  | int | end
| ) |  |

CORE_dlaed3_updatevectors -

Parameters

  [in] | op | Type of operation to apply = PlasmaLaed3Update1: Apply the GEMM on the first subproblem = PlasmaLaed3Update2: Apply the GEMM on the second subproblem and merge the eigenvalues. = PlasmaLaed3UpdateAll: Apply all operations in one call.
  [in] | wsmode | Specifies the amount of extra workspace used for the computations. = 0 : means that no extra workspace is available (WORK = NULL). S = Q2 + n12 * n1 + n23 * (n-n1) is used as the workspace to sequentially apply the updates = 1 : means that extra workspace has been allocated in CORE_dlaed3_computevectors() to apply the updates in parallel. If op = PlasmaLaed3Update1, the first subproblem is updated. If op = PlasmaLaed3Update2, the second subproblem is updated. = 3 : means that extra workspace has been allocated in after K has been computed in CORE_dlaed2_computeK(). Allows to apply both updates in parallel as previously.
  [in] | n | n specifies the dimension of the symmetric tridiagonal matrix
  [in] | n1 | n1 specifies the location of the last eigenvalue of the first subproblem min(1, n) <= n1 <= n/2
  [in] | K | K specifies the number of non-deflated eigenvalues
  [in] | il_nondef | The first eigenvector index when computing only a subset of all eigenpairs
  [in] | iu_nondef | The last eigenvector index when computing only a subset of all eigenpairs
  [out] | Q | The current eigenvectors
  [in] | ldq | LDQ specifies the leading direction of Q
  [in,out] | Q2 | The updated eigenvectors
  [in] | ctot | ctot indicates the number of vectors of each type in the Q matrix. 0- non-zero in the upper half only 1- dense 2- non-zero in the lower half only 3- deflated
  [in] | W | W is the place were will be stored the updated eigenvectors
  [in] | start | start specifies the first column index to be considered by this kernel
  [in] | end | end specifies the last column index to be considered by this kernel