unlike xvtstdcsp the result is stored in a Condition Register specified by BF.
this allows it to be used as a predicate mask. setb may be used to create the equivalent of xvtstdcsp if desired.
-| 0.5| 6..10 |11.15| 16.20 | 21...30 |31| name | Form |
-| -- | ----- | --- | ----- | ------- |--| ------- | ------ |
-| PO | BF/dx | FRA | dc | XO |dm| fptstsp | XX2-Form|
+| 0.5| 6.8 |9.10|11.15| 16.20 | 21...30 |31| name | Form |
+| -- | --- | -- | --- | ----- | ------- |--| ------- | ------ |
+| PO | BF | dx | FRA | dc | XO |dm| fptstsp | XX2-Form|
```
DCMX <- dc || dm || dx