From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 23 Sep 2022 19:20:39 +0000 (+0100)
Subject: remove barse-ackwardsness, use SelectableInt() in decode_bo
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=09ac856dba6eb9b96a13b84a8e175152ff7bcb8f;p=openpower-isa.git

remove barse-ackwardsness, use SelectableInt() in decode_bo
---

diff --git a/src/openpower/sv/trans/svp64.py b/src/openpower/sv/trans/svp64.py
index 8a6d271a..6037de94 100644
--- a/src/openpower/sv/trans/svp64.py
+++ b/src/openpower/sv/trans/svp64.py
@@ -668,7 +668,10 @@ def decode_bo(encoding):
         "encoding %s for BO Mode not recognised" % encoding
     # barse-ackwards MSB0/LSB0. sigh
     mapped = pmap[encoding]
-    return int(bin(mapped)[:1:-1], 2) # to 0bNNN, reverse-and-strip b0, base2
+    si =  SelectableInt(0, 3)
+    si[0] = mapped>>2
+    si[1:3] = mapped & 3
+    return int(si)
 
 
 # partial-decode fail-first mode