{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"sym::ctlz_nonzero"}]}
                        sym::ctlz_nonzero => self.count_leading_zeroes(width, args[0].immediate()),
                        }
                        sym::cttz_nonzero => self.count_trailing_zeroes(width, args[0].immediate()),