there is no sign-extension, and for XLEN=8 truncation of `SI` will occur.
Illustrates that there are subtle quirks involved, requiring some thought.
+The reason for keeping as many bits of the Immediate as possible should be clear.
+
## Compare Ranged Byte (cmprb BF,L,RA,RB)
```
## Trap Word Immediate
Like FP Single operations there also exist operations at "half of regfile width"
-in the Integer realm. They are discernable with the designation `Word` in their
-title.
+in the Integer realm. They are discernable with the designation "Word" in their
+title, such as "Trap WORD Immediate".
```
a <- EXTS((RA)[XLEN/2:XLEN-1])