Intial Thumb2 Sandbox (naclrev 6680)

src/trusted/validator_arm/generate_decoder.py

 #!/usr/bin/python
 #
-# Copyright 2009 The Native Client Authors.  All rights reserved.
+# Copyright 2011 The Native Client Authors.  All rights reserved.
 # Use of this source code is governed by a BSD-style license that can
 # be found in the LICENSE file.
-# Copyright 2009, Google Inc.
+# Copyright 2011, Google Inc.
 #
 
 """Decoder Generator script.
 
-Usage: generate-decoder.py <table-file> <output-cc-file>
+Usage: generate-decoder.py <arm-table-file> <thumb-table-file> <output-cc-file>

[Karl, 2011/09/19 19:56:05]

Again, thumb or thumb2?

[jasonwkim, 2011/09/26 21:35:52]

Decision on whethwe you are in thumb2 (vs old thumb) actually depends on the
architecture level.

and transition between arm and thumb mode is idential (i.e. LSB of jump target
ADDRESS set to 1 whether or not you are using thumb2 instructions or not

so the correct thing to say is

thumb MODE
thumb2 ISA

 """
 
 import sys
 import dgen_input
 import dgen_output
 
-def main(argv):
-    table_filename, output_filename = argv[1], argv[2]
-
-    print "Decoder Generator reading ", table_filename
-    f = open(table_filename, 'r')
+def get_tables(filename):
+    print "Decoder Generator reading ", filename
+    f = open(filename, 'r')
     tables = dgen_input.parse_tables(f)
     f.close()
+    print "Successful - got %d tables." % len (tables)
+    return tables
 
-    print "Successful - got %d tables." % len(tables)
+def main(argv):
+    arm_filename, thumb_filename, output_filename = argv[1], argv[2], argv[3]
+    arm_tables = get_tables(arm_filename)
+    thumb_tables = get_tables(thumb_filename)
 
     print "Generating output to %s..." % output_filename
     f = open(output_filename, 'w')
-    dgen_output.generate_decoder(tables,
+    dgen_output.generate_decoder(arm_tables, thumb_tables,
         dgen_output.COutput(f))
     f.close()
+
     print "Completed."
 
     return 0
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))