PSLAMR1D(3)   ScaLAPACK routine of NEC Numeric Library Collection  PSLAMR1D(3)



NAME
       PSLAMR1D  -  redistributes  a  one-dimensional row vector from one data
       decomposition to another.

SYNOPSIS
       SUBROUTINE PSLAMR1D( N, A, IA, JA, DESCA, B, IB, JB, DESCB )

           INTEGER      IA, IB, JA, JB, N

           INTEGER      DESCA( * ), DESCB( * )

           REAL         A( * ), B( * )

PURPOSE
       PSLAMR1D redistributes a  one-dimensional  row  vector  from  one  data
       decomposition to another.

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

       Notes
       =====
       Although all processes call PSGEMR2D, 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) REAL 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) REAL 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                    PSLAMR1D(3)