unimp.hh

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/*
 * Copyright (c) 2003-2005 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,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __ARCH_SPARC_INSTS_UNIMP_HH__
#define __ARCH_SPARC_INSTS_UNIMP_HH__
 
#include <memory>
 
#include "arch/generic/debugfaults.hh"
#include "arch/sparc/insts/static_inst.hh"
#include "base/cprintf.hh"
 
namespace gem5
{
 
namespace SparcISA
{
 
//
// Unimplemented instructions
//
 
class FailUnimplemented : public SparcStaticInst
{
  public:
    FailUnimplemented(const char *_mnemonic, ExtMachInst _machInst) :
            SparcStaticInst(_mnemonic, _machInst, No_OpClass)
    {
        flags[IsInvalid] = true;
    }
 
    Fault
    execute(ExecContext *xc, trace::InstRecord *traceData) const override
    {
        return std::make_shared<GenericISA::M5PanicFault>(
            "attempt to execute unimplemented instruction '%s' (inst %#08x)",
            mnemonic, machInst);
    }
 
    std::string
    generateDisassembly(
            Addr pc, const loader::SymbolTable *symtab) const override
    {
        return csprintf("%-10s (unimplemented)", mnemonic);
    }
};
 
class WarnUnimplemented : public SparcStaticInst
{
  private:
    mutable bool warned;
 
  public:
    WarnUnimplemented(const char *_mnemonic, ExtMachInst _machInst) :
            SparcStaticInst(_mnemonic, _machInst, No_OpClass), warned(false)
    {}
 
    Fault
    execute(ExecContext *xc, trace::InstRecord *traceData) const override
    {
        if (!warned) {
            return std::make_shared<GenericISA::M5WarnFault>(
                "instruction '%s' unimplemented\n", mnemonic);
            warned = true;
        }
        return NoFault;
    }
 
    std::string
    generateDisassembly(
            Addr pc, const loader::SymbolTable *symtab) const override
    {
        return csprintf("%-10s (unimplemented)", mnemonic);
    }
};
 
} // namespace SparcISA
} // namespace gem5
 
#endif // __ARCH_SPARC_INSTS_UNIMP_HH__