struct svp64_desc {
  uint64_t mode : 3;
  uint64_t in1 : 4;
  uint64_t in2 : 5;
  uint64_t in3 : 4;
  uint64_t out : 4;
  uint64_t out2 : 4;
  uint64_t cr_in : 4;
  uint64_t cr_in2 : 2;
  uint64_t cr_out : 3;
  uint64_t ptype : 3;
  uint64_t etype : 2;
  uint64_t extra_idx_in1 : 3;
  uint64_t extra_idx_in2 : 3;
  uint64_t extra_idx_in3 : 3;
  uint64_t extra_idx_out : 3;
  uint64_t extra_idx_out2 : 3;
  uint64_t extra_idx_cr_in : 3;
  uint64_t extra_idx_cr_in2 : 3;
  uint64_t extra_idx_cr_out : 3;
  uint64_t Rc : 1;
  uint64_t : 1;
};