From 9127940e0591f5cac4f9820b4fab0f66e6f1ffa3 Mon Sep 17 00:00:00 2001
From: lkcl <lkcl@web>
Date: Mon, 13 Jun 2022 23:15:19 +0100
Subject: [PATCH]

---
 openpower/sv/mv.swizzle.mdwn | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/openpower/sv/mv.swizzle.mdwn b/openpower/sv/mv.swizzle.mdwn
index b6b121875..af419bf8b 100644
--- a/openpower/sv/mv.swizzle.mdwn
+++ b/openpower/sv/mv.swizzle.mdwn
@@ -161,8 +161,6 @@ Swizzle Pseudocode:
         if swiz[i] == 0b001:
             dst_subvl = i+1
             break
-    # source subvector length is maximum of both RM fields
-    src_subvl = MAX(SRC_SUBVL, SUBVL)
 ```
 
 What is going on here is that the option is provided to have different
@@ -172,6 +170,26 @@ each destination position, the marker "0b001" may be used to indicate
 the end. If no marker is present then the destination subvector length
 may be assumed to be 4.
 
+```
+    def index_src():
+        for i in range(VL):
+            for j in range(SUBVL):
+                if swiz[j] == 0b000: # skip
+                    continue
+                if swiz[j] == 0b001: # end
+                    break
+                if swiz[j] in [0b010, 0b011]:
+                    yield (i*SUBVL, CONSTANT)
+                else:
+                    yield (i*SUBVL, swiz[j]-3)
+
+    # yield an outer-SUBVL, inner VL loop with DEST SUBVL
+    def index_dest():
+        for i in range(VL):
+            for j in range(dst_subvl):
+                yield i*dst_subvl+j
+```
+
 **Effect of Saturation on Vectorised Swizzle**
 
 A useful convenience for pixel data is to be able to insert values
-- 
2.30.2