DLASDT(3S)DLASDT(3S)NAME
DLASDT - create a tree of subproblems for bidiagonal divide and conquer
SYNOPSIS
SUBROUTINE DLASDT( N, LVL, ND, INODE, NDIML, NDIMR, MSUB )
INTEGER LVL, MSUB, N, ND
INTEGER INODE( * ), NDIML( * ), NDIMR( * )
IMPLEMENTATION
These routines are part of the SCSL Scientific Library and can be loaded
using either the -lscs or the -lscs_mp option. The -lscs_mp option
directs the linker to use the multi-processor version of the library.
When linking to SCSL with -lscs or -lscs_mp, the default integer size is
4 bytes (32 bits). Another version of SCSL is available in which integers
are 8 bytes (64 bits). This version allows the user access to larger
memory sizes and helps when porting legacy Cray codes. It can be loaded
by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
only one of the two versions; 4-byte integer and 8-byte integer library
calls cannot be mixed.
PURPOSE
DLASDT creates a tree of subproblems for bidiagonal divide and conquer.
ARGUMENTS
N (input) INTEGER
On entry, the number of diagonal elements of the bidiagonal
matrix.
LVL (output) INTEGER
On exit, the number of levels on the computation tree.
ND (output) INTEGER
On exit, the number of nodes on the tree.
INODE (output) INTEGER array, dimension ( N )
On exit, centers of subproblems.
NDIML (output) INTEGER array, dimension ( N )
On exit, row dimensions of left children.
NDIMR (output) INTEGER array, dimension ( N )
On exit, row dimensions of right children.
MSUB (input) INTEGER.
On entry, the maximum row dimension each subproblem at the bottom
of the tree can be of.
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DLASDT(3S)DLASDT(3S)FURTHER DETAILS
Based on contributions by
Ming Gu and Huan Ren, Computer Science Division, University of
California at Berkeley, USA
SEE ALSOINTRO_LAPACK(3S), INTRO_SCSL(3S)
This man page is available only online.
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