unknown.isa revision 12234:78ece221f9f5 
1// Copyright (c) 2006 The Regents of The University of Michigan
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met: redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer;
8// redistributions in binary form must reproduce the above copyright
9// notice, this list of conditions and the following disclaimer in the
10// documentation and/or other materials provided with the distribution;
11// neither the name of the copyright holders nor the names of its
12// contributors may be used to endorse or promote products derived from
13// this software without specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26//
27// Authors: Gabe Black
28//          Steve Reinhardt
29
30////////////////////////////////////////////////////////////////////
31//
32// Unknown instructions
33//
34
35output header {{
36        /**
37         * Class for Unknown/Illegal instructions
38         */
39        class Unknown : public SparcStaticInst
40        {
41          public:
42
43            // Constructor
44            Unknown(ExtMachInst _machInst) :
45                    SparcStaticInst("unknown", _machInst, No_OpClass)
46            {
47            }
48
49            %(BasicExecDeclare)s
50
51            std::string generateDisassembly(Addr pc,
52                    const SymbolTable *symtab) const;
53
54        };
55}};
56
57output decoder {{
58        std::string Unknown::generateDisassembly(Addr pc,
59                const SymbolTable *symtab) const
60        {
61            return "Unknown instruction";
62        }
63}};
64
65output exec {{
66        Fault Unknown::execute(ExecContext *xc,
67                Trace::InstRecord *traceData) const
68        {
69            return std::make_shared<IllegalInstruction>();
70        }
71}};
72
73def format Unknown() {{
74        decode_block = 'return new Unknown(machInst);\n'
75}};
76