spmd_fvb_amax.F File Reference

#include "implicit_f.inc"
#include "spmd.inc"
#include "com01_c.inc"
#include "task_c.inc"

Go to the source code of this file.

Functions/Subroutines
subroutine	spmd_fvb_amax (idcmax, idcmaxl)

Function/Subroutine Documentation

spmd_fvb_amax()

subroutine spmd_fvb_amax	(	integer	idcmax,
		integer	idcmaxl )

Definition at line 31 of file spmd_fvb_amax.F.

C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
        USE spmd_comm_world_mod, ONLY : spmd_comm_world
#include      "implicit_f.inc"
C-----------------------------------------------------------------
C   M e s s a g e   P a s s i n g
C-----------------------------------------------
#include "spmd.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com01_c.inc"
#include      "task_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER IDCMAX, IDCMAXL
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
#ifdef MPI
      INTEGER I, ITAG, MSGOFF, IDCMAXP(NSPMD-1), REQ(NSPMD-1),
     .        STAT(MPI_STATUS_SIZE,NSPMD-1), IERR
C-----------------------------------------------
      DATA msgoff/7053/
C-----------------------------------------------
C
      IF (ispmd==0) THEN
         DO i=1,nspmd-1
            itag=msgoff
            CALL mpi_irecv(idcmaxp(i), 1, mpi_integer, it_spmd(i+1),
     .                     itag, spmd_comm_world, req(i), ierr)
         ENDDO
         CALL mpi_waitall(nspmd-1, req, stat, ierr)
C         
         idcmax=idcmaxl
         DO i=1,nspmd-1
            idcmax=max(idcmax,idcmaxp(i))
         ENDDO
      ELSE
         itag=msgoff
         CALL mpi_isend(idcmaxl, 1, mpi_integer, it_spmd(1),
     .                  itag, spmd_comm_world, req, ierr)
         CALL mpi_wait(req, stat, ierr)
      ENDIF
C
#endif
      RETURN