Name
HPL_rollN Roll U and forward the column panel.
Synopsis
#include "hpl.h"
void
HPL_rollN(
HPL_T_panel *
PBCST,
int *
IFLAG,
HPL_T_panel *
PANEL,
const int
N,
double *
U,
const int
LDU,
const int *
IPLEN,
const int *
IPMAP,
const int *
IPMAPM1
);
Description
HPL_rollN
rolls the local arrays containing the local pieces of U, so
that on exit to this function  U  is replicated in every process row.
In addition, this function probe for the presence of the column panel
and forwards it when available.
Arguments
PBCST   (local input/output)          HPL_T_panel *
        On entry,  PBCST  points to the data structure containing the
        panel (to be broadcast) information.
IFLAG   (local input/output)          int *
        On entry, IFLAG  indicates  whether or not  the broadcast has
        already been completed.  If not,  probing will occur, and the
        outcome will be contained in IFLAG on exit.
PANEL   (local input/output)          HPL_T_panel *
        On entry,  PANEL  points to the data structure containing the
        panel (to be rolled) information.
N       (local input)                 const int
        On entry, N specifies the number of columns of  U.  N must be
        at least zero.
U       (local input/output)          double *
        On entry,  U  is an array of dimension (LDU,*) containing the
        local pieces of U in each process row.
LDU     (local input)                 const int
        On entry, LDU specifies the local leading dimension of U. LDU
        should be at least  MAX(1,IPLEN[NPROW]).
IPLEN   (global input)                const int *
        On entry, IPLEN is an array of dimension NPROW+1.  This array
        is such that IPLEN[i+1] - IPLEN[i] is the number of rows of U
        in each process row.
IPMAP   (global input)                const int *
        On entry, IMAP  is an array of dimension  NPROW.  This  array
        contains  the  logarithmic mapping of the processes. In other
        words,  IMAP[myrow]  is the absolute coordinate of the sorted
        process.
IPMAPM1 (global input)                const int *
        On entry,  IMAPM1  is an array of dimension NPROW. This array
        contains  the inverse of the logarithmic mapping contained in
        IMAP: For i in [0.. NPROW) IMAPM1[IMAP[i]] = i.
See Also
HPL_pdlaswp01N.