From b6e90f790ac13cfb3408c7ffcafd5182e22752ad Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 7 Apr 2020 19:13:38 +0100
Subject: [PATCH] add "undefined" to namespace

---
 src/soc/decoder/isa/caller.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/soc/decoder/isa/caller.py b/src/soc/decoder/isa/caller.py
index 6000786f..8a4da033 100644
--- a/src/soc/decoder/isa/caller.py
+++ b/src/soc/decoder/isa/caller.py
@@ -150,12 +150,16 @@ class ISACaller:
         # create CR then allow portions of it to be "selectable" (below)
         self.cr = SelectableInt(0, 32)
 
+        # "undefined", just set to variable-bit-width int (use exts "max")
+        self.undefined = SelectableInt(0, 256) # TODO, not hard-code 256!
+
         self.namespace = {'GPR': self.gpr,
                           'MEM': self.mem,
                           'memassign': self.memassign,
                           'NIA': self.pc.NIA,
                           'CIA': self.pc.CIA,
                           'CR': self.cr,
+                          'undefined': self.undefined,
                           }
 
         # field-selectable versions of Condition Register TODO check bitranges?
-- 
2.30.2