From: lkcl <lkcl@web>
Date: Sun, 29 May 2022 09:18:31 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~2044
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4d4341a2dffae646c565c6c74e0ff7127ea84b3b;p=libreriscv.git

---

diff --git a/openpower/sv.mdwn b/openpower/sv.mdwn
index 13e7812fb..23eca5283 100644
--- a/openpower/sv.mdwn
+++ b/openpower/sv.mdwn
@@ -70,6 +70,13 @@ same level as add, popcnt and fld**
   for a location at all, and may be moved to EXT059, EXT019,
   EXT031 or other much more suitable location.
 
+Note that there is no Sandbox allocation in the published ISA Spec for
+v3.1 EXT01 usage, and because SVP64 is already 64-bit Prefixed,
+Prefixed-Prefixed-instructions (SVP64 Prefixed v3.1 Prefixed)
+would become a whopping 96-bit long instruction. Avoiding this
+situation is a high priority which in turn by necessity puts pressure
+on the 32-bit Major Opcode space.
+
 # Sub-pages
 
 Pages being developed and examples