{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"\"M2.cnacs.s1\""}]}
                    "M2.cnacs.s1" => "__builtin_HEXAGON_M2_cnacs_s1",
                    "M2.cnacs.s0" => "__builtin_HEXAGON_M2_cnacs_s0",
                    "M2.cnacsc.s0" => "__builtin_HEXAGON_M2_cnacsc_s0",