UCS_MASK           56 ompi/mca/pml/ucx/pml_ucx_request.h         _ucp_tag = (((uint64_t)(_src) & UCS_MASK(PML_UCX_RANK_BITS)) << PML_UCX_CONTEXT_BITS) | \
UCS_MASK           66 ompi/mca/pml/ucx/pml_ucx_request.h     (((_tag) >> PML_UCX_CONTEXT_BITS) & UCS_MASK(PML_UCX_RANK_BITS))