From: lkcl <lkcl@web>
Date: Tue, 19 Jan 2021 14:49:39 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~400
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9517626a24cc32c853fab231313d5592fcdc99fa;p=libreriscv.git

---

diff --git a/openpower/sv/remap.mdwn b/openpower/sv/remap.mdwn
index 69d5295c5..b60b297a5 100644
--- a/openpower/sv/remap.mdwn
+++ b/openpower/sv/remap.mdwn
@@ -186,10 +186,11 @@ An example where SUBVL Remap is appropriate is the Rijndael MixColumns stage:
 
 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/AES-MixColumns.svg/600px-AES-MixColumns.svg.png" width="400px" />
 
-A 2D REMAP allows:
+Assuming that the bytes are stored `a00 a01 a02 a03 a10 .. a33`
+a 2D REMAP allows:
 
-* the column bytes (as a vec4) to be iterated over as an inner loop.
-  (`a00 a10 a20 a30`)
+* the column bytes (as a vec4) to be iterated over as an inner loop,
+  progressing vertically (`a00 a10 a20 a30`)
 * the columns themselves to be iterated as an outer loop
 * a 32 bit `GF(256)` multiply on the vec4 to be performed.