| 0-1 | 2 | 3 4 | description |
| ------ | --- |---------|-------------------------- |
| 0 0 | 0 | dz sz | simple mode |
-| 0 0 | 1 | 0 RG | scalar reduce mode (mapreduce) |
-| 0 0 | 1 | 1 / | reserved |
+| 0 0 | 1 | RG 0 | scalar reduce mode (mapreduce) |
+| 0 0 | 1 | / 1 | reserved |
| 1 0 | N | dz sz | sat mode: N=0/1 u/s |
| VLi 1 | inv | CR-bit | Rc=1: ffirst CR sel |
| VLi 1 | inv | zz RC1 | Rc=0: ffirst z/nonz |