(no commit message)

diff --git a/openpower/sv/rfc/ls001/discussion.mdwn b/openpower/sv/rfc/ls001/discussion.mdwn
index ebb0128b076cdec20a97235e8a11936f9f151880..8a33870d9e2944e0ca2aca18f2848fb37c903629 100644 (file)
--- 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