-* default bitwidth for a given operation *divided* by two
-* default bitwidth for a given operation *multiplied* by two
-* 8-bit
-
-At first glance this seems completely inadequate: for example, RV64
-cannot possibly operate on 16-bit operations, because 64 divided by
-2 is 32. However, the reader may have forgotten that it is possible,
-at run-time, to switch a 64-bit application into 32-bit mode, by
-setting UXL. Once switched, opcodes that formerly had 64-bit
-meanings now have 32-bit meanings, and in this way, "default/2"
-now reaches **16-bit** where previously it meant "32-bit".
-
-There is however an absolutely crucial aspect oF SV here that explicitly
+* 8 bit
+* 16 hit
+* 32 bit
+
+This would seem inadequate, surely it would be better to have 3 bits or more and allow 64, 128 and some other options besides. The answer here is, it gets too complex, no RV128 implementation yet exists, and so RV64's default is 64 bit, so the 4 major element widths are covered anyway.
+
+There is an absolutely crucial aspect oF SV here that explicitly