{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"(types::F64,"}]}
            (types::F64, types::F16) => return f64_to_f16(fx, from),
            (types::F128, types::F16) => "__trunctfhf2",
            (types::F32, types::F16) => return f32_to_f16(fx, from),