From 358af205f4e38f0a0e8e275fd01eed272873f4e3 Mon Sep 17 00:00:00 2001
From: lkcl <lkcl@web>
Date: Fri, 9 Jun 2023 02:01:28 +0100
Subject: [PATCH]

---
 openpower/sv/po9_encoding/discussion.mdwn | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/openpower/sv/po9_encoding/discussion.mdwn b/openpower/sv/po9_encoding/discussion.mdwn
index da26b4c2b..e1deb2040 100644
--- a/openpower/sv/po9_encoding/discussion.mdwn
+++ b/openpower/sv/po9_encoding/discussion.mdwn
@@ -95,21 +95,23 @@ Length detection:
 
 TODO 
 aim of this idea is to attempt simplification of area identification
-and length.
+and length.  the 55-bit area is eliminated but may be reintroduced.
 
 
 
 
 ```
-|0-5| 6-28|29 30 31|32|33-36|37 | 38-60 | 61-63 | Description      |
-|---|-----|--------|--|-----|---|-------|-------|------------------|
-|PO9| rm0 | 1  0 0 | 0 0000  rm1|  xxxx | 000   | SVP64:EXT900     |
-|PO9|!ZERO| 1  0 0 | 0 1000  1  |  xxxx | 000   | SSingle:EXT900   |
-|PO9| xxx | 1  0 0 | 0 !zero0   |  xxxx | !zero1| 55-bit RESERVED  |
-|PO9| xxxx   | 0 0 |            32-bit EXT900                      |
-|PO9| !ZERO  | 1 0 |  0 | DWi                 | SSingle:EXT232-263 |
-|PO9|  0000  | 1 0 |  0 | DWi                 | Scalar EXT232-263  |
-|PO9|  nnnn  | 1 0 |  1 | DWi                 | SVP64:EXT232-263   |
+|0-5| 6-29   |30 31|32|33-36|37 | 38-61 | 62-63 | Description      |
+|---|--------|-----|--|-----|---|-------|-------|------------------|
+|PO9| xxxx   | 0 0 | (next new instruction)     |  32-bit EXT900   |
+|PO9| 0000   | 1 0 | 0 1000  1  |  xxxx |  00   | RESERVED         |
+|PO9| !ZERO  | 1 0 | 0 1000  1  |  xxxx |  00   | SSingle:EXT900   |
+|PO9| nnnn   | 1 0 | 0 1000  1  |  xxxx |  01   | SVP64:EXT900     |
+|PO9| xxxx   | 1 0 | 0 1000  1  |  xxxx |  10   | RESERVED         |
+|PO9| xxxx   | 1 0 | 0 1000  1  |  xxxx |  11   | RESERVED         |
+|PO9| !ZERO  | 1 0 | 0 | !PO9   |     xxxx      | SSingle:EXT232-263 |
+|PO9|  0000  | 1 0 | 0 | !PO9   |     xxxx      | Scalar EXT232-263  |
+|PO9|  nnnn  | 1 0 | 1 | !PO9   |     xxxx      | SVP64:EXT232-263   |
 |PO9|  0000  | 0 1 | Defined Word-instruction | 32-bit Unvec in 64b|
 |PO9| !ZERO  | 0 1 | Defined Word-instruction | SSingle:EXT000-063 |
 |PO9|  nnnn  | 1 1 | Defined Word-instruction | SVP64:EXT000-063   |
-- 
2.30.2