MPI2_SGE_FLAGS_CHAIN_ELEMENT
sgc->Flags = MPI2_SGE_FLAGS_CHAIN_ELEMENT | MPI2_SGE_FLAGS_64_BIT_ADDRESSING;
case MPI2_SGE_FLAGS_CHAIN_ELEMENT:
if ((sgc->Flags & MPI2_SGE_FLAGS_CHAIN_ELEMENT) == 0) {