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HPL_dlocswpN(3)              HPL Library Functions             HPL_dlocswpN(3)


NAME

       HPL_dlocswpN - locally swaps rows within panel.


SYNOPSIS

       #include "hpl.h"

       void HPL_dlocswpN( HPL_T_panel * PANEL, const int II, const int JJ,
       double * WORK );


DESCRIPTION

       HPL_dlocswpN performs  the local swapping operations  within a panel.
       The lower triangular  N0-by-N0  upper block of the panel is stored in
       no-transpose form (i.e. just like the input matrix itself).


ARGUMENTS

       PANEL   (local input/output)    HPL_T_panel *
               On entry,  PANEL  points to the data structure containing the
               panel information.

       II      (local input)           const int
               On entry, II  specifies the row offset where the column to be
               operated on starts with respect to the panel.

       JJ      (local input)           const int
               On entry, JJ  specifies the column offset where the column to
               be operated on starts with respect to the panel.

       WORK    (local workspace)       double *
               On entry, WORK  is a workarray of size at least 2 * (4+2*N0).
               WORK[0] contains  the  local  maximum  absolute value scalar,
               WORK[1] contains  the corresponding local row index,  WORK[2]
               contains the corresponding global row index, and  WORK[3]  is
               the coordinate of process owning this max.  The N0 length max
               row is stored in WORK[4:4+N0-1];  Note  that this is also the
               JJth row  (or column) of L1. The remaining part of this array
               is used as workspace.


SEE ALSO

       HPL_dlocmax (3), HPL_dlocswpT (3), HPL_pdmxswp (3), HPL_pdpancrN (3),
       HPL_pdpancrT (3), HPL_pdpanllN (3), HPL_pdpanllT (3), HPL_pdpanrlN (3),
       HPL_pdpanrlT (3), HPL_pdrpancrN (3), HPL_pdrpancrT (3),
       HPL_pdrpanllN (3), HPL_pdrpanllT (3), HPL_pdrpanrlN (3),
       HPL_pdrpanrlT (3), HPL_pdfact (3).

HPL 2.1                        October 26, 2012                HPL_dlocswpN(3)

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