{"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"let"}]}
    let res = fx.bcx.ins().bor(res, sign);
    let sign = fx.bcx.ins().band_imm(rhs, 0x8000);
    fx.bcx.ins().bitcast(types::F16, MemFlags::new(), res)