C      Parameters used with MPI.

#ifdef ALLOW_MPI
       COMMON /MPI_INFO/
     &  mpi_pid,     mpi_np,
#ifdef DECOMP2D
     &  ewslice, nsslice,
     &  mpi_eastId, mpi_westId,
#endif
     &  mpi_northId, mpi_southId,
     &  comm_use

       INTEGER mpi_pid
       INTEGER mpi_np
       INTEGER mpi_northId
       INTEGER mpi_southId
#ifdef DECOMP2D
       INTEGER mpi_eastId
       INTEGER mpi_westId
       INTEGER ewslice
       INTEGER nsslice
#endif
       INTEGER comm_use

#ifndef USE_SINGLE_PRECISION
#define _MPI_TYPE_REAL MPI_REAL8
#else
#define _MPI_TYPE_REAL MPI_REAL
#endif
#endif