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

// Copyright (c) 2006 The Regents of The University of Michigan
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// 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
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Gabe Black
//          Steve Reinhardt

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

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

            // Constructor
            Unknown(ExtMachInst _machInst) :
                    SparcStaticInst("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
        {
            return new IllegalInstruction;
        }
}};

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