UCT_ATOMIC_OP_SWAP   22 opal/mca/btl/uct/btl_uct_amo.c     [MCA_BTL_ATOMIC_SWAP] = UCT_ATOMIC_OP_SWAP + 1,
UCT_ATOMIC_OP_SWAP   66 opal/mca/btl/uct/btl_uct_tl.c     {UCS_BIT(UCT_ATOMIC_OP_SWAP), MCA_BTL_ATOMIC_SUPPORTS_SWAP},