spmd_exch_tag_scnd.F File Reference

#include "implicit_f.inc"
#include "spmd.inc"
#include "com01_c.inc"
#include "com04_c.inc"
#include "task_c.inc"

Go to the source code of this file.

Functions/Subroutines
subroutine	spmd_exch_tag_scnd (itagnd, fr_cnds, iad_cnds, lcomm)

Function/Subroutine Documentation

spmd_exch_tag_scnd()

subroutine spmd_exch_tag_scnd	(	integer, dimension(*)	itagnd,
		integer, dimension(*)	fr_cnds,
		integer, dimension(*)	iad_cnds,
		integer	lcomm )

Definition at line 32 of file spmd_exch_tag_scnd.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      "com04_c.inc"
#include      "task_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER LCOMM, ITAGND(*), FR_CNDS(*), IAD_CNDS(*)
C-----------------------------------------------
C   L o c a l  V a r i a b l e s
C-----------------------------------------------
#ifdef MPI
      INTEGER MSGTYP,LOC_PROC,NOD,I,J,L,IDEB,IAD,LEN,
     .        NBINDEX,INDEX,MSGOFF,SIZ,IERROR,
     .        STATUS(MPI_STATUS_SIZE),
     .        REQ_S(NSPMD),REQ_R(NSPMD),INDEXI(NSPMD)
      DATA msgoff/1179/
      integer
     .        sbuf(lcomm),rbuf(lcomm)
C-----------------------------------------------
C   S o u r c e  L i n e s
C-----------------------------------------------
      loc_proc = ispmd + 1
      DO i=1,nspmd
        siz = iad_cnds(i+1)-iad_cnds(i)
        IF(siz>0)THEN
         l = iad_cnds(i)
          msgtyp = msgoff 
          CALL mpi_irecv(
     s      rbuf(l),siz  ,mpi_integer,it_spmd(i),msgtyp,
     g      spmd_comm_world,req_r(i),ierror)
        ENDIF
      END DO
C
C preparation envoi  a proc I
C--------------------------------------------------------------------
      DO i=1,nspmd
       DO j=iad_cnds(i),iad_cnds(i+1)-1
        nod =  fr_cnds(j)
          IF (iabs(itagnd(nod))>ns10e) THEN
         sbuf(j) = 1
          ELSE
         sbuf(j) = 0
          END IF
       ENDDO
      ENDDO
C
C   echange messages
C--------------------------------------------------------------------
      DO i=1,nspmd
        siz = iad_cnds(i+1)-iad_cnds(i)
        IF(siz>0)THEN
          l = iad_cnds(i)
          msgtyp = msgoff 
          CALL mpi_isend(
     +      sbuf(l),siz,mpi_integer,it_spmd(i),msgtyp,
     +      spmd_comm_world,req_s(i),ierror)
        ENDIF        
      ENDDO
C
C assemblage
C--------------------------------------------------------------------
      DO i=1,nspmd
        siz = iad_cnds(i+1)-iad_cnds(i)
       IF(siz>0)THEN
        CALL mpi_wait(req_r(i),status,ierror)
        DO j=iad_cnds(i),iad_cnds(i+1)-1
         nod =  fr_cnds(j)
         IF (itagnd(nod)>0) THEN
          IF (itagnd(nod)<=ns10e.AND.rbuf(j)==1)
     +     itagnd(nod) = itagnd(nod) + ns10e
         ELSEIF(itagnd(nod)<0) THEN
          IF (itagnd(nod)>=-ns10e.AND.rbuf(j)==1)
     +     itagnd(nod) = itagnd(nod) - ns10e
         END IF
        ENDDO
       ENDIF
      ENDDO
C
C--------------------------------------------------------------------
      DO i = 1, nspmd
        IF((iad_cnds(i+1)-iad_cnds(i))>0)THEN
          CALL mpi_wait(req_s(i),status,ierror)
        ENDIF
      ENDDO
C
#endif
      RETURN