xref: /gem5/src/arch/x86/isa/formats/unknown.isa

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// Copyright (c) 2007 The Regents of The University of Michigan
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
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// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// Authors: Gabe Black

////////////////////////////////////////////////////////////////////
//
// Unknown instructions
//

output header {{
        /**
         * Class for Unknown/Illegal instructions
         */
        class Unknown : public StaticInst
        {
          public:

            // Constructor
            Unknown(ExtMachInst _machInst) :
                    StaticInst("unknown", _machInst, No_OpClass)
            {
            }

            %(BasicExecDeclare)s

            std::string generateDisassembly(Addr pc,
                    const SymbolTable *symtab) const;

        };
}};

output decoder {{
        std::string Unknown::generateDisassembly(Addr pc,
                const SymbolTable *symtab) const
        {
            return "Unknown instruction";
        }
}};

output exec {{
        Fault Unknown::execute(%(CPU_exec_context)s *xc,
                Trace::InstRecord *traceData) const
        {
            warn("No instructions are implemented for X86!\n");
            return NoFault;
        }
}};

def format Unknown() {{
        decode_block = 'return new Unknown(machInst);\n'
}};