spmd_fxb_for.F

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!||====================================================================
!||    spmd_fxb_for          ../engine/source/mpi/kinematic_conditions/spmd_fxb_for.f
!||--- called by ------------------------------------------------------
!||    fxbyfor               ../engine/source/constraints/fxbody/fxbyfor.F
!||--- calls      -----------------------------------------------------
!||--- uses       -----------------------------------------------------
!||    spmd_comm_world_mod   ../engine/source/mpi/spmd_comm_world.F90
!||====================================================================
      SUBROUTINE spmd_fxb_for(FXBIPM, MFEXTP)
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      "com04_c.inc"
#include      "task_c.inc"
#include      "fxbcom.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER FXBIPM(NBIPM,*)
      my_real
     .        mfextp(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
#ifdef MPI
      INTEGER NFX, NMOD, NME, LEN, AVAR, PMAIN, II, I, ITAG, MSGOFF,
     .        REQ(NSPMD-1), STAT(MPI_STATUS_SIZE,NSPMD-1), IERR,
     .        J
      my_real
     .       , DIMENSION(:,:), ALLOCATABLE :: ff
C
      DATA msgoff /196/
C
      DO nfx=1,nfxbody
         nmod=fxbipm(4,nfx)
         nme=fxbipm(17,nfx)
         len=nme+nmod
         avar=fxbipm(13,nfx)
         pmain=fxbipm(39,nfx)
         IF (ispmd==pmain) THEN
            ALLOCATE(ff(len,nspmd-1))
            ii=0
            DO i=1,nspmd
               IF (ispmd==i-1) cycle
               ii=ii+1
               itag=msgoff
               CALL mpi_irecv(ff(1,ii), len, real, it_spmd(i), itag,
     .                        spmd_comm_world, req(ii), ierr)
            ENDDO
C
            CALL mpi_waitall(nspmd-1, req, stat, ierr)
            DO i=1,nspmd-1
               DO j=1,len
                  mfextp(avar+j-1)=mfextp(avar+j-1)+ff(j,i)
               ENDDO
            ENDDO
            DEALLOCATE(ff)
         ELSE
            itag=msgoff
            CALL mpi_isend(mfextp(avar), len, real, it_spmd(pmain+1),
     .                     itag, spmd_comm_world, req(1), ierr)
C
            CALL mpi_wait(req, stat, ierr)
         ENDIF
      ENDDO
C
#endif
      RETURN
      END