clarify

diff --git a/simple_v_extension.mdwn b/simple_v_extension.mdwn
index bd4c44b2eed7a29c745206934585c4488166d618..59f7d6b12ca27392e3dc35b5967e1ea85a67968a 100644 (file)
--- a/simple_v_extension.mdwn
+++ b/simple_v_extension.mdwn
@@ -379,6 +379,10 @@ Notes:
   as opposed to having the predicate register explicitly in the instruction.
 * Whilst the predication CSR is a key-value store it *generates* easier-to-use
   state information.
+* TODO: assess whether the same technique could be applied to the other
+  Vector CSRs, particularly as pointed out in Section 17.8 (Draft RV 0.4,
+  V2.3-Draft ISA Reference) it becomes possible to greatly reduce state
+  needed for context-switches (empty slots need never be stored).
 
 ## Predication CSR