spmd_i21crit.F

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C
!||====================================================================
!||    spmd_i21crit          ../engine/source/mpi/interfaces/spmd_i21crit.F
!||--- called by ------------------------------------------------------
!||    i21_icrit             ../engine/source/interfaces/intsort/i21_icrit.F
!||--- calls      -----------------------------------------------------
!||    spmd_rbcast           ../engine/source/mpi/generic/spmd_rbcast.F
!||--- uses       -----------------------------------------------------
!||    spmd_comm_world_mod   ../engine/source/mpi/spmd_comm_world.F90
!||====================================================================
      SUBROUTINE spmd_i21crit(GAPINF,VX,VY,VZ,DIST)
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      "intstamp_c.inc"
#include      "task_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      my_real
     .        gapinf(*),vx(*),vy(*),vz(*),dist(*)
C-----------------------------------------------
C   L o c a l  V a r i a b l e s
C-----------------------------------------------
#ifdef MPI
      INTEGER I, N, MSGTYP, IERROR, LOC_PROC,
     .        SIZE
      my_real
     .        rbuf(5,nintstamp,nspmd),rrbuf(5,nintstamp)
C-----------------------------------------------
C   S o u r c e  L i n e s
C-----------------------------------------------
C
      loc_proc=ispmd+1
      SIZE = 5*nintstamp
C
      DO n=1,nintstamp
        rrbuf(1,n) = gapinf(n)
        rrbuf(2,n) = vx(n)
        rrbuf(3,n) = vy(n)
        rrbuf(4,n) = vz(n)
        rrbuf(5,n) = dist(n)
      END DO
C
      CALL mpi_gather(
     s    rrbuf         ,SIZE  ,real,
     r    rbuf          ,SIZE  ,real,it_spmd(1),
     g    spmd_comm_world,ierror)
      IF(ispmd==0) THEN
        DO n=1,nintstamp
         DO i = 2, nspmd
          IF(rbuf(1,n,i)<rbuf(1,n,1))THEN
            rbuf(1,n,1) = rbuf(1,n,i)
          END IF
          IF(rbuf(2,n,i)>rbuf(2,n,1))THEN
            rbuf(2,n,1) = rbuf(2,n,i)
          END IF
          IF(rbuf(3,n,i)>rbuf(3,n,1))THEN
            rbuf(3,n,1) = rbuf(3,n,i)
          END IF
          IF(rbuf(4,n,i)>rbuf(4,n,1))THEN
            rbuf(4,n,1) = rbuf(4,n,i)
          END IF
          IF(rbuf(5,n,i)<rbuf(5,n,1))THEN
            rbuf(5,n,1) = rbuf(5,n,i)
          END IF
         END DO
        END DO
      END IF
      CALL spmd_rbcast(rbuf,rbuf,SIZE,1,0,2)
C
      DO n=1,nintstamp
        gapinf(n)=rbuf(1,n,1)
        vx(n)    =rbuf(2,n,1)
        vy(n)    =rbuf(3,n,1)
        vz(n)    =rbuf(4,n,1)
        dist(n)  =rbuf(5,n,1)
      END DO
C
#endif
      RETURN
      END