From: lkcl <lkcl@web>
Date: Sat, 13 Feb 2021 14:10:29 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: convert-csv-opcode-to-binary~187
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8dd67f3aea788cdc371372f227870464e8e5faa4;p=libreriscv.git

---

diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn
index 0d3436983..cc78fb8a8 100644
--- a/openpower/sv/bitmanip.mdwn
+++ b/openpower/sv/bitmanip.mdwn
@@ -63,7 +63,7 @@ minor opcode allocation
 | NN | RS | RA  | RB  | deg   | 00  011  |Rc| gfmul |
 | NN | RS | RA  | RB  | deg   | 01  011  |Rc| gfadd |
 | NN | RT | RA  | RB  | deg   | 10  011  |Rc| gfinv |
-| NN | RS | RA  | RB  | deg   | 11  011  |Rc| gf rsvd |
+| NN | RS | RA  | RB  | deg   | 11  011  |Rc| gfmod |
 
 | 0.5|6.10|11.15| 16.23 |24.27 | 28.30 |31| name |
 | -- | -- | --- | ----- | ---- | ----- |--| ------ |
@@ -599,6 +599,10 @@ def gf_invert(a, mod=0x1B) :
   return g1
 ```
 
+## GF mod
+
+modulo arithmetic to ensure a polynomial is in range seems sensible to have.
+
 # bitmatrix
 
 ```