C -*- Mode: Fortran; -*- 

C

C  (C) 2012 by Argonne National Laboratory.

C      See COPYRIGHT in top-level directory.

C

      program main

      implicit none

      include 'mpif.h'

      integer NUM_INTS

      parameter (NUM_INTS=2)

      integer maxSize

      parameter (maxSize=128)

      integer scounts(maxSize), sdispls(maxSize)

      integer rcounts(maxSize), rdispls(maxSize)

      integer types(maxSize)

      integer sbuf(maxSize), rbuf(maxSize)

      integer comm, size, rank, req

      integer ierr, errs

      integer ii, ans

      errs = 0

      call mtest_init(ierr)

      comm = MPI_COMM_WORLD

      call MPI_Comm_size(comm, size, ierr)

      call MPI_Comm_rank(comm, rank, ierr)

C      

      do ii = 1, size

         sbuf(2*ii-1) = ii

         sbuf(2*ii)   = ii

         sbuf(2*ii-1) = ii

         sbuf(2*ii)   = ii

         scounts(ii)  = NUM_INTS

         rcounts(ii)  = NUM_INTS

         sdispls(ii)  = (ii-1) * NUM_INTS

         rdispls(ii)  = (ii-1) * NUM_INTS

         types(ii)    = MPI_INTEGER

      enddo

      call MPI_Ibarrier(comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ibcast(sbuf, NUM_INTS, MPI_INTEGER, 0, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Igather(sbuf, NUM_INTS, MPI_INTEGER,

     .                  rbuf, NUM_INTS, MPI_INTEGER,

     .                  0, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Igatherv(sbuf, NUM_INTS, MPI_INTEGER,

     .                   rbuf, rcounts, rdispls, MPI_INTEGER,

     .                   0, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ialltoall(sbuf, NUM_INTS, MPI_INTEGER,

     .                    rbuf, NUM_INTS, MPI_INTEGER,

     .                    comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ialltoallv(sbuf, scounts, sdispls, MPI_INTEGER,

     .                     rbuf, rcounts, rdispls, MPI_INTEGER,

     .                     comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ialltoallw(sbuf, scounts, sdispls, types,

     .                     rbuf, rcounts, rdispls, types,

     .                     comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ireduce(sbuf, rbuf, NUM_INTS, MPI_INTEGER,

     .                  MPI_SUM, 0, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Iallreduce(sbuf, rbuf, NUM_INTS, MPI_INTEGER,

     .                     MPI_SUM, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ireduce_scatter(sbuf, rbuf, rcounts, MPI_INTEGER,

     .                          MPI_SUM, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Ireduce_scatter_block(sbuf, rbuf, NUM_INTS, MPI_INTEGER,

     .                                MPI_SUM, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Iscan(sbuf, rbuf, NUM_INTS, MPI_INTEGER,

     .                MPI_SUM, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call MPI_Iexscan(sbuf, rbuf, NUM_INTS, MPI_INTEGER,

     .                  MPI_SUM, comm, req, ierr)

      call MPI_Wait(req, MPI_STATUS_IGNORE, ierr)

      call mtest_finalize( errs )

      end