gem5/src/arch/x86/isa/microops/base.isa

// -*- mode:c++ -*-

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// Authors: Gabe Black

let {{
    # This will be populated with mappings between microop mnemonics and
    # the classes that represent them.
    microopClasses = {}
}};

//A class which is the base of all x86 micro ops. It provides a function to
//set necessary flags appropriately.
output header {{
    class X86MicroOpBase : public X86StaticInst
    {
      protected:
        const char * instMnem;
        uint8_t opSize;
        uint8_t addrSize;

        X86MicroOpBase(ExtMachInst _machInst,
                const char *mnem, const char *_instMnem,
                bool isMicro, bool isDelayed,
                bool isFirst, bool isLast,
                OpClass __opClass) :
            X86StaticInst(mnem, _machInst, __opClass),
            instMnem(_instMnem)
        {
            flags[IsMicroOp] = isMicro;
            flags[IsDelayedCommit] = isDelayed;
            flags[IsFirstMicroOp] = isFirst;
            flags[IsLastMicroOp] = isLast;
        }

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

            ccprintf(ss, "\t%s.%s", instMnem, mnemonic);

            return ss.str();
        }
    };
}};

//////////////////////////////////////////////////////////////////////////
//
// Base class for the python representation of x86 microops
//
//////////////////////////////////////////////////////////////////////////

let {{
    class X86Microop(object):
        def __init__(self, name):
            self.name = name

        # This converts a list of python bools into
        # a comma seperated list of C++ bools.
        def microFlagsText(self, vals):
            text = ""
            for val in vals:
                if val:
                    text += ", true"
                else:
                    text += ", false"
            return text

        def getAllocator(self, mnemonic, *microFlags):
            return 'new %s(machInst, %s)' % (self.className, mnemonic, self.microFlagsText(microFlags))
}};

//////////////////////////////////////////////////////////////////////////
//
// LdStOp Microop templates
//
//////////////////////////////////////////////////////////////////////////

def template MicroLdStOpDeclare {{
    class %(class_name)s : public X86MicroOpBase
    {
      protected:
        const uint8_t scale;
        const RegIndex index;
        const RegIndex base;
        const uint64_t disp;
        const uint8_t segment;
        const RegIndex data;
        const uint8_t dataSize;
        const uint8_t addressSize;
        void buildMe();

      public:
        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                uint8_t _scale, RegIndex _index, RegIndex _base,
                uint64_t _disp, uint8_t _segment,
                RegIndex _data,
                uint8_t _dataSize, uint8_t _addressSize);

        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                uint8_t _scale, RegIndex _index, RegIndex _base,
                uint64_t _disp, uint8_t _segment,
                RegIndex _data,
                uint8_t _dataSize, uint8_t _addressSize);

        %(BasicExecDeclare)s
    };
}};

def template MicroLdStOpConstructor {{

    inline void %(class_name)s::buildMe()
    {
        %(constructor)s;
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            uint8_t _scale, RegIndex _index, RegIndex _base,
            uint64_t _disp, uint8_t _segment,
            RegIndex _data,
            uint8_t _dataSize, uint8_t _addressSize) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                false, false, false, false, %(op_class)s),
                scale(_scale), index(_index), base(_base),
                disp(_disp), segment(_segment),
                data(_data),
                dataSize(_dataSize), addressSize(_addressSize)
    {
        buildMe();
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
            uint8_t _scale, RegIndex _index, RegIndex _base,
            uint64_t _disp, uint8_t segment,
            RegIndex data,
            uint8_t dataSize, uint8_t addressSize) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                isMicro, isDelayed, isFirst, isLast, %(op_class)s),
                scale(_scale), index(_index), base(_base),
                disp(_disp), segment(_segment),
                data(_data),
                dataSize(_dataSize), addressSize(_addressSize)
    {
        buildMe();
    }
}};

//////////////////////////////////////////////////////////////////////////
//
// FpOp Microop templates
//
//////////////////////////////////////////////////////////////////////////

//TODO Actually write an fp microop base class.