From dd2cb3ffadb8b425db9c16d576c7642a041c2aee Mon Sep 17 00:00:00 2001
From: Ben Elliston <bje@air.not.au>
Date: Thu, 9 Jan 2003 03:08:32 +0000
Subject: [PATCH] 2003-01-09  Ben Elliston  <bje@redhat.com>

        From Graydon Hoare <graydon@redhat.com>:
	* utils-sim.scm (-gen-decoder-switch): Fix edge condition for
	empty ISAs.
---
 ChangeLog     | 6 ++++++
 utils-sim.scm | 8 +++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 0a670ef..351b724 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2003-01-09  Ben Elliston  <bje@redhat.com>
+
+        From Graydon Hoare <graydon@redhat.com>:
+	* utils-sim.scm (-gen-decoder-switch): Fix edge condition for
+	empty ISAs.
+
 2002-12-21  Doug Evans  <dje@sebabeach.org>
 
 	* ifield.scm (-ifield-parse): Rewrite <bitrange> computation.
diff --git a/utils-sim.scm b/utils-sim.scm
index b049a61..4a291fb 100644
--- a/utils-sim.scm
+++ b/utils-sim.scm
@@ -938,9 +938,11 @@
 			";\n"
 			indent "  val = "))
        (string-append indent "  unsigned int val = "))
-   (-gen-decode-bits (dtable-guts-bitnums table-guts)
-		     (dtable-guts-startbit table-guts)
-		     (dtable-guts-bitsize table-guts) "insn" lsb0?)
+   (if (< (length (dtable-guts-bitnums table-guts)) 1)
+       "0"
+       (-gen-decode-bits (dtable-guts-bitnums table-guts)
+			 (dtable-guts-startbit table-guts)
+			 (dtable-guts-bitsize table-guts) "insn" lsb0?))
    ";\n"
    indent "  switch (val)\n"
    indent "  {\n"
-- 
2.43.5