macroop.hh

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/*
 * 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
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 * modified or unmodified, in source code or in binary form.
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 * met: redistributions of source code must retain the above copyright
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#ifndef __ARCH_X86_INSTS_MACROOP_HH__
#define __ARCH_X86_INSTS_MACROOP_HH__
 
#include "arch/x86/insts/badmicroop.hh"
#include "arch/x86/insts/static_inst.hh"
#include "arch/x86/emulenv.hh"
#include "arch/x86/types.hh"
 
namespace gem5
{
 
namespace X86ISA
{
// Base class for combinationally generated macroops
class MacroopBase : public X86StaticInst
{
  protected:
    const char *macrocodeBlock;
 
    const uint32_t numMicroops;
    X86ISA::EmulEnv env;
 
    //Constructor.
    MacroopBase(const char *mnem, ExtMachInst _machInst,
            uint32_t _numMicroops, X86ISA::EmulEnv _env) :
                X86StaticInst(mnem, _machInst, No_OpClass),
                numMicroops(_numMicroops), env(_env)
    {
        assert(numMicroops);
        microops = new StaticInstPtr[numMicroops];
        flags[IsMacroop] = true;
    }
 
    ~MacroopBase()
    {
        delete [] microops;
    }
 
    StaticInstPtr * microops;
 
    StaticInstPtr
    fetchMicroop(MicroPC microPC) const override
    {
        if (microPC >= numMicroops)
            return badMicroop;
        else
            return microops[microPC];
    }
 
    std::string
    generateDisassembly(Addr pc,
                        const loader::SymbolTable *symtab) const override
    {
        return mnemonic;
    }
 
  public:
    ExtMachInst
    getExtMachInst()
    {
        return machInst;
    }
 
    X86ISA::EmulEnv
    getEmulEnv()
    {
        return env;
    }
 
    void size(size_t newSize) override
    {
        for (int i = 0; i < numMicroops; i++) {
            microops[i]->size(newSize);
        }
        _size = newSize;
    }
};
 
} // namespace X86ISA
} // namespace gem5
 
#endif //__ARCH_X86_INSTS_MACROOP_HH__