From: lkcl <lkcl@web>
Date: Sat, 10 Sep 2022 09:22:38 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~533
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=89759360e9c76c5443e62c6b6f6e45596f0b1e38;p=libreriscv.git

---

diff --git a/openpower/sv/rfc/ls001/discussion.mdwn b/openpower/sv/rfc/ls001/discussion.mdwn
index ebb0128b0..8a33870d9 100644
--- a/openpower/sv/rfc/ls001/discussion.mdwn
+++ b/openpower/sv/rfc/ls001/discussion.mdwn
@@ -114,3 +114,7 @@ EXT200-263 and EXT300-363 respectively seems sane.
 EXT300-363 for `RESERVED1` comes with a caveat that it can
 **never** be SVP64-Augmented.
 
+the only downside of the third PO Group (EXT300-363) is that
+this is now *four* PO Groups right at the Decode Phase:
+EXT0nn EXT1nn EXT2nn and EXT3nn.  this is incredibly expensive.
+however we don't actually need EXT3nn, it's just a nice-to-have