The format of the STATE CSR is as follows:
-| (30..29 | (28..27) | (26..24) | (23..18) | (17..12) | (11..6) | (5...0) |
+| (29..28 | (27..26) | (25..24) | (23..18) | (17..12) | (11..6) | (5...0) |
| ------- | -------- | -------- | -------- | -------- | ------- | ------- |
| dsvoffs | ssvoffs | subvl | destoffs | srcoffs | vl | maxvl |
--
+Expand the range of SUBVL and its associated svsrcoffs and svdestoffs by
+adding a 2nd STATE CSR (or extending STATE to 64 bits). Future version?
+
+--
+
TODO evaluate strncpy and strlen
<https://groups.google.com/forum/m/#!msg/comp.arch/bGBeaNjAKvc/_vbqyxTUAQAJ>