From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 24 Sep 2022 10:25:04 +0000 (+0100)
Subject: comment inv,CRbit swap in decode_bo
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9d2f3501ba18097e358938cd5b8967fb7f8da5c8;p=openpower-isa.git

comment inv,CRbit swap in decode_bo
---

diff --git a/src/openpower/sv/trans/svp64.py b/src/openpower/sv/trans/svp64.py
index f242fe5c..61438284 100644
--- a/src/openpower/sv/trans/svp64.py
+++ b/src/openpower/sv/trans/svp64.py
@@ -666,7 +666,9 @@ def decode_bo(encoding):
     }
     assert encoding in pmap, \
         "encoding %s for BO Mode not recognised" % encoding
-    # barse-ackwards MSB0/LSB0. sigh
+    # barse-ackwards MSB0/LSB0. sigh.  this would be nice to be the
+    # same as the decode_predicate() CRfield table above, but (inv,CRbit)
+    # is how it is in the spec [decode_predicate is (CRbit,inv)]
     mapped = pmap[encoding]
     si =  SelectableInt(0, 3)
     si[0] = mapped & 1 # inv