PLASMA: PLASMA_sgebrd_Tile

PLASMA 2.4.6

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PLASMA_sgebrd_Tile
PLASMA_sgecon_Tile
PLASMA_sgelqf_Tile
PLASMA_sgelqs_Tile
PLASMA_sgels_Tile
PLASMA_sgemm_Tile
PLASMA_sgeqrf_Tile
PLASMA_sgeqrs_Tile
PLASMA_sgesv_incpiv_Tile
PLASMA_sgesv_Tile
PLASMA_sgesvd_Tile
PLASMA_sgetrf_incpiv_Tile
PLASMA_sgetrf_Tile
PLASMA_sgetri_Tile
PLASMA_sgetrs_incpiv_Tile
PLASMA_sgetrs_Tile
PLASMA_slacpy_Tile
PLASMA_slange_Tile
PLASMA_slansy_Tile
PLASMA_slaset_Tile
PLASMA_slaswp_Tile
PLASMA_slaswpc_Tile
PLASMA_slauum_Tile
PLASMA_sorglq_Tile
PLASMA_sorgqr_Tile
PLASMA_sormlq_Tile
PLASMA_sormqr_Tile
PLASMA_splgsy_Tile
PLASMA_splrnt_Tile
PLASMA_spocon_Tile
PLASMA_sposv_Tile
PLASMA_spotrf_Tile
PLASMA_spotri_Tile
PLASMA_spotrs_Tile
PLASMA_ssyev_Tile
PLASMA_ssyevd_Tile
PLASMA_ssygst_Tile
PLASMA_ssygv_Tile
PLASMA_ssygvd_Tile
PLASMA_ssymm_Tile
PLASMA_ssyr2k_Tile
PLASMA_ssyrk_Tile
PLASMA_ssytrd_Tile
PLASMA_strmm_Tile
PLASMA_strsm_Tile
PLASMA_strsmpl_Tile
PLASMA_strsmrv_Tile
PLASMA_strtri_Tile
int PLASMA_sgebrd_Tile | ( | PLASMA_desc * | A,
|  | float * | D,
|  | float * | E,
|  | PLASMA_desc * | T
| ) |  |
  PLASMA_sgebrd_Tile - reduces a general complex M-by-N matrix A to upper or lower bidiagonal form B using a two-stage approach First stage: reduction to band bidiagonal form (orthogonal matrices Q1 and P1); Second stage: reduction from band to bidiagonal form (orthogonal matrices Q2 and P2). Let Q = Q1 * Q2 be the global left unitary transformation; Let P = P1 * P2 be the global right unitary transformation; Q**T * A * P = B. If M >= N, B is upper bidiagonal; if M < N, B is lower bidiagonal. Note: T is incomplete and contains only the block reflectors of the first stage. Therefore, Q and P can not be built completely. Tile equivalent of PLASMA_sgebrd(). Operates on matrices stored by tiles. All matrices are passed through descriptors. All dimensions are taken from the descriptors. Parameters
  [in,out] | A | On entry, the M-by-N matrix A. On exit, if M >= N, the diagonal and the first superdiagonal are overwritten with the upper bidiagonal matrix B; the elements below the diagonal, with the array T, represent the unitary matrix Q as a product of elementary reflectors, and the elements above the first superdiagonal, with the array T, represent the unitary matrix P as a product of elementary reflectors; if M < N, the diagonal and the first subdiagonal are overwritten with the lower bidiagonal matrix B; the elements below the first subdiagonal, with the array T, represent the unitary matrix Q as a product of elementary reflectors, and the elements above the diagonal, with the array T, represent the unitary matrix P as a product of elementary reflectors.
  [out] | D | The real array containing the diagonal elements of the bidiagonal matrix B: D(i) = A(i,i). Dimension (min(M,N)).
  [out] | E | The real array containing the off-diagonal elements of the bidiagonal matrix B: if M >= N, E(i) = A(i,i+1) for i = 1,2,...,N-1; if M < N, E(i) = A(i+1,i) for i = 1,2,...,M-1. Dimension (min(M,N)-1).
  [out] | T | On exit, contains auxiliary factorization data.
Returns PLASMA_SUCCESS successful exit See Also PLASMA_sgebrd PLASMA_sgebrd_Tile_Async PLASMA_cgebrd_Tile PLASMA_dgebrd_Tile PLASMA_sgebrd_Tile