wrp_reg_subpart
wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off);
wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo,
wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0);
wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2),
wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2),