PDLAMR1D(3)   ScaLAPACK routine of NEC Numeric Library Collection  PDLAMR1D(3)



NAME
       PDLAMR1D  -  redistributes  a  one-dimensional row vector from one data
       decomposition to another.

SYNOPSIS
       SUBROUTINE PDLAMR1D( N, A, IA, JA, DESCA, B, IB, JB, DESCB )

           INTEGER      IA, IB, JA, JB, N

           INTEGER      DESCA( * ), DESCB( * )

           DOUBLE       PRECISION A( * ), B( * )

PURPOSE
       PDLAMR1D redistributes a  one-dimensional  row  vector  from  one  data
       decomposition to another.

       This is an auxiliary routine called by PDSYTRD to redistribute D, E and
       TAU.

       Notes
       =====
       Although all processes call PDGEMR2D, only the processes that  own  the
       first  column of A send data and only processes that own the first col-
       umn of B receive data.  The calls to DGEBS2D/DGEBR2D  spread  the  data
       down.


ARGUMENTS
       N       (global input) INTEGER
               The size of the matrix to be transposed.

       A       (local output) DOUBLE PRECISION pointer into the
               local  memory to an array of dimension (LOCc(JA+N-1)).  On out-
               put, A is replicated across all  processes  in  this  processor
               column.

       IA      (global input) INTEGER
               A's global row index, which points to the beginning of the sub-
               matrix which is to be operated on.

       JA      (global input) INTEGER
               A's global column index, which points to the beginning  of  the
               submatrix which is to be operated on.

       DESCA   (global and local input) INTEGER array of dimension DLEN_.
               The array descriptor for the distributed matrix A.

       B       (local input/local output) DOUBLE PRECISION pointer into the
               local memory to an array of dimension (LOCc(JB+N-1)).

       IB      (global input) INTEGER
               B's global row index,  NOT USED

       JB      (global input) INTEGER
               B's  global  column index, which points to the beginning of the
               submatrix which is to be operated on.

       DESCB   (global and local input) INTEGER array of dimension DLEN_.
               The array descriptor for the distributed matrix B.



ScaLAPACK routine               31 October 2017                    PDLAMR1D(3)