From d55a3a073ac731ec9ec87ee39a2ce8d4191afcd9 Mon Sep 17 00:00:00 2001
From: Nick Gasson <nick@nickg.me.uk>
Date: Mon, 11 Aug 2008 13:53:42 +0100
Subject: [PATCH] Handle '?' in vl_to_vhdl_bit

The rough translation is '-', although the semantics are incompatible
in some cases (e.g. '-' = '1' is false)
---
 tgt-vhdl/vhdl_helper.hh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tgt-vhdl/vhdl_helper.hh b/tgt-vhdl/vhdl_helper.hh
index d003ff1ef..a9c4b7717 100644
--- a/tgt-vhdl/vhdl_helper.hh
+++ b/tgt-vhdl/vhdl_helper.hh
@@ -69,6 +69,8 @@ static inline char vl_to_vhdl_bit(char bit)
    case 'x':
    case 'X':
       return 'U';
+   case '?':
+      return '-';
    }
    assert(false);
 }