From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 24 Apr 2018 10:34:17 +0000 (+0100)
Subject: clarify
X-Git-Tag: convert-csv-opcode-to-binary~5583
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f11442b94d4b9a280f34be30d3f0ae35dee586dc;p=libreriscv.git

clarify
---

diff --git a/simple_v_extension.mdwn b/simple_v_extension.mdwn
index bd4c44b2e..59f7d6b12 100644
--- 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