20251209

#define VI_XI_SLIDEDOWN_PARAMS(x, off) \
  auto &vd = P.VU.elt<type_sew_t<x>::type>(rd_num, i, true); \
  auto vs2 = P.VU.elt<type_sew_t<x>::type>(rs2_num, i + off);

和类型斗，其乐无穷。