opcdec.isa revision 2649:2fb859a457a2 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2005 The Regents of The University of Michigan
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met: redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer;
10// redistributions in binary form must reproduce the above copyright
11// notice, this list of conditions and the following disclaimer in the
12// documentation and/or other materials provided with the distribution;
13// neither the name of the copyright holders nor the names of its
14// contributors may be used to endorse or promote products derived from
15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29////////////////////////////////////////////////////////////////////
30//
31// OPCDEC fault instructions
32//
33
34output header {{
35    /**
36     * Static instruction class for instructions that cause an OPCDEC fault
37     * when executed.  This is currently only for PAL mode instructions
38     * executed in non-PAL mode.
39     */
40    class OpcdecFault : public AlphaStaticInst
41    {
42      public:
43        /// Constructor
44        OpcdecFault(ExtMachInst _machInst)
45            : AlphaStaticInst("opcdec fault", _machInst, No_OpClass)
46        {
47        }
48
49        %(BasicExecDeclare)s
50
51        std::string
52        generateDisassembly(Addr pc, const SymbolTable *symtab) const;
53    };
54}};
55
56output decoder {{
57    std::string
58    OpcdecFault::generateDisassembly(Addr pc, const SymbolTable *symtab) const
59    {
60        return csprintf("%-10s (inst 0x%x, opcode 0x%x)",
61                        " OPCDEC fault", machInst, OPCODE);
62    }
63}};
64
65output exec {{
66    Fault
67    OpcdecFault::execute(%(CPU_exec_context)s *xc,
68                     Trace::InstRecord *traceData) const
69    {
70        return new UnimplementedOpcodeFault;
71    }
72}};
73
74def format OpcdecFault() {{
75    decode_block = 'return new OpcdecFault(machInst);\n'
76}};
77
78