{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"(types::F128,"}]}
            (types::F128, types::F64 | types::F32 | types::F16)
            | (types::F64, types::F128) => fx.bcx.ins().fpromote(to_ty, from),
            | (types::F64, types::F32 | types::F16)