chb2st_kernels.f(3) LAPACK chb2st_kernels.f(3)

chb2st_kernels.f


subroutine chb2st_kernels (UPLO, WANTZ, TTYPE, ST, ED, SWEEP, N, NB, IB, A, LDA, V, TAU, LDVT, WORK)
CHB2ST_KERNELS

CHB2ST_KERNELS

Purpose:

CHB2ST_KERNELS is an internal routine used by the CHETRD_HB2ST
subroutine.

Parameters

UPLO
UPLO is CHARACTER*1

WANTZ

WANTZ is LOGICAL which indicate if Eigenvalue are requested or both
Eigenvalue/Eigenvectors.

TTYPE

TTYPE is INTEGER

ST

ST is INTEGER
internal parameter for indices.

ED

ED is INTEGER
internal parameter for indices.

SWEEP

SWEEP is INTEGER
internal parameter for indices.

N

N is INTEGER. The order of the matrix A.

NB

NB is INTEGER. The size of the band.

IB

IB is INTEGER.

A

A is COMPLEX array. A pointer to the matrix A.

LDA

LDA is INTEGER. The leading dimension of the matrix A.

V

V is COMPLEX array, dimension 2*n if eigenvalues only are
requested or to be queried for vectors.

TAU

TAU is COMPLEX array, dimension (2*n).
The scalar factors of the Householder reflectors are stored
in this array.

LDVT

LDVT is INTEGER.

WORK

WORK is COMPLEX array. Workspace of size nb.

Further Details:

Implemented by Azzam Haidar.
All details are available on technical report, SC11, SC13 papers.
Azzam Haidar, Hatem Ltaief, and Jack Dongarra.
Parallel reduction to condensed forms for symmetric eigenvalue problems
using aggregated fine-grained and memory-aware kernels. In Proceedings
of 2011 International Conference for High Performance Computing,
Networking, Storage and Analysis (SC '11), New York, NY, USA,
Article 8 , 11 pages.
http://doi.acm.org/10.1145/2063384.2063394
A. Haidar, J. Kurzak, P. Luszczek, 2013.
An improved parallel singular value algorithm and its implementation
for multicore hardware, In Proceedings of 2013 International Conference
for High Performance Computing, Networking, Storage and Analysis (SC '13).
Denver, Colorado, USA, 2013.
Article 90, 12 pages.
http://doi.acm.org/10.1145/2503210.2503292
A. Haidar, R. Solca, S. Tomov, T. Schulthess and J. Dongarra.
A novel hybrid CPU-GPU generalized eigensolver for electronic structure
calculations based on fine-grained memory aware tasks.
International Journal of High Performance Computing Applications.
Volume 28 Issue 2, Pages 196-209, May 2014.
http://hpc.sagepub.com/content/28/2/196

Definition at line 167 of file chb2st_kernels.f.

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