lookup table is 4 bits wide not 8 bits, and secondly the lookup
table comes from a register not an immediate.
-| 0.5|6.10|11.15|16.20| 21..25|26..30 |31| Form |
-| -- | -- | --- | --- | ----- |------ |--|---------|
-| NN | RT | RA | RB | RC |nh 0000|1 | VA-Form |
-| NN | RT | RA | RB | /BFA/ |0 0100|1 | VA-Form |
+| 0.5|6.10|11.15|16.20| 21..25|26..31 | Form |
+| -- | -- | --- | --- | ----- |--------|---------|
+| NN | RT | RA | RB | RC |nh 00001| VA-Form |
+| NN | RT | RA | RB | /BFA/ |0 01001| VA-Form |
For binlut: