AMD0F_WRITE_FIDVID
AMD0F_WRITE_FIDVID(cfid, val, 0ULL);
AMD0F_WRITE_FIDVID(cfid, cvid - 1, 0ULL);
AMD0F_WRITE_FIDVID(val, cvid,
AMD0F_WRITE_FIDVID(fv->fid, cvid,
AMD0F_WRITE_FIDVID(cfid, fv->vid, 0ULL);