MPI_SGE_FL_SIZE_64
flags = MPI_SGE_FL_TYPE_SIMPLE | MPI_SGE_FL_SIZE_64;
MPI_SGE_FL_SIZE_64 | addr);
MPI_SGE_FL_SIZE_64 | MPI_SGE_FL_LAST | MPI_SGE_FL_EOB |
htolem32(&sge->sg_hdr, MPI_SGE_FL_TYPE_SIMPLE | MPI_SGE_FL_SIZE_64 |