2513     uint8_t top3bits;  in sg_is_scsi_cdb()  local
2518     top3bits = opcode >> 5;  in sg_is_scsi_cdb()
2519     if (0x3 == top3bits) {  in sg_is_scsi_cdb()
2537             if (top3bits > 0x5)         /* vendor */  in sg_is_scsi_cdb()
2539             return (0x0 == top3bits);   /* 6 byte cdb */  in sg_is_scsi_cdb()
2541             if (top3bits > 0x5)         /* vendor */  in sg_is_scsi_cdb()
2543             return ((0x1 == top3bits) || (0x2 == top3bits)); /* 10 byte cdb */  in sg_is_scsi_cdb()
2545             if (top3bits > 0x5)         /* vendor */  in sg_is_scsi_cdb()
2547             return (0x4 == top3bits);   /* 16 byte cdb */  in sg_is_scsi_cdb()
2549             if (top3bits > 0x5)         /* vendor */  in sg_is_scsi_cdb()
2551             return (0x5 == top3bits);   /* 12 byte cdb */  in sg_is_scsi_cdb()