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decoder bug fix
- From: Ben Elliston <bje at redhat dot com>
- To: cgen at sources dot redhat dot com
- Date: 09 Jan 2003 14:07:30 +1100
- Subject: decoder bug fix
I am committing the following patch (written by Graydon Hoare last
year) that fixes an edge condition in the (-gen-decoder-switch) logic.
Ben
2003-01-09 Ben Elliston <bje@redhat.com>
From Graydon Hoare <graydon@redhat.com>:
* utils-sim.scm (-gen-decoder-switch): Fix edge condition
empty ISAs.
Index: utils-sim.scm
===================================================================
RCS file: /cvs/src/src/cgen/utils-sim.scm,v
retrieving revision 1.8
diff -u -p -r1.8 utils-sim.scm
--- utils-sim.scm 20 Dec 2002 07:58:32 -0000 1.8
+++ utils-sim.scm 9 Jan 2003 03:05:01 -0000
@@ -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"
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