! This file created from test/mpi/f77/coll/allredopttf.f with f77tof90

! -*- Mode: Fortran; -*-

!

!  (C) 2007 by Argonne National Laboratory.

!      See COPYRIGHT in top-level directory.

!

      program main

      use mpi_f08

      integer*8 inbuf, outbuf

      double complex zinbuf, zoutbuf

      integer wsize

      integer errs, ierr

      errs = 0

      call mtest_init( ierr )

      call mpi_comm_size( MPI_COMM_WORLD, wsize, ierr )

!

! A simple test of allreduce for the optional integer*8 type

      inbuf = 1

      outbuf = 0

      call mpi_allreduce(inbuf, outbuf, 1, MPI_INTEGER8, MPI_SUM,  &

      &                   MPI_COMM_WORLD, ierr)

      if (outbuf .ne. wsize ) then

         errs = errs + 1

         print *, "result wrong for sum with integer*8 = got ", outbuf,  &

      & " but should have ", wsize

      endif

      zinbuf = (1,1)

      zoutbuf = (0,0)

      call mpi_allreduce(zinbuf, zoutbuf, 1, MPI_DOUBLE_COMPLEX,  &

      &                   MPI_SUM,  MPI_COMM_WORLD, ierr)

      if (dreal(zoutbuf) .ne. wsize ) then

         errs = errs + 1

         print *, "result wrong for sum with double complex = got ",  &

      & outbuf, " but should have ", wsize

      endif

      if (dimag(zoutbuf) .ne. wsize ) then

         errs = errs + 1

         print *, "result wrong for sum with double complex = got ",  &

      & outbuf, " but should have ", wsize

      endif

      call mtest_finalize( errs )

      call mpi_finalize( ierr )

      end