xref: /gem5/src/arch/x86/isa/microops/ldstop.isa

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// Authors: Gabe Black

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


// Load templates

output header {{
    /**
     * Base class for load and store ops
     */
    class LdStOp : 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;

        //Constructor
        LdStOp(ExtMachInst _machInst,
                const char * mnem, 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,
                OpClass __opClass) :
        X86MicroopBase(machInst, mnem, _instMnem,
                isMicro, isDelayed, isFirst, isLast, __opClass),
                scale(_scale), index(_index), base(_base),
                disp(_disp), segment(_segment),
                data(_data),
                dataSize(_dataSize), addressSize(_addressSize)
        {}

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

output decoder {{
    std::string LdStOp::generateDisassembly(Addr pc,
            const SymbolTable *symtab) const
    {
        std::stringstream response;

        printMnemonic(response, instMnem, mnemonic);
        printReg(response, data);
        response << ", ";
        printSegment(response, segment);
        ccprintf(response, ":[%d*", scale);
        printReg(response, index);
        response << " + ";
        printReg(response, base);
        ccprintf(response, " + %#x]", disp);
        return response.str();
    }
}};

def template MicroLoadExecute {{
    Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
          Trace::InstRecord *traceData) const
    {
        Fault fault = NoFault;
        Addr EA;

        %(op_decl)s;
        %(op_rd)s;
        %(ea_code)s;
        DPRINTF(X86, "%s : %s: The address is %#x\n", instMnem, mnemonic, EA);

        fault = xc->read(EA, (%(mem_acc_type)s%(mem_acc_size)s_t&)Mem, 0);
        if(fault == NoFault)
        {
            %(code)s;
        }
        if(fault == NoFault)
        {
            %(op_wb)s;
        }

        return fault;
    }
}};

def template MicroLoadInitiateAcc {{
    Fault %(class_name)s::initiateAcc(%(CPU_exec_context)s * xc,
            Trace::InstRecord * traceData) const
    {
        Fault fault = NoFault;
        Addr EA;

        %(op_decl)s;
        %(op_rd)s;
        %(ea_code)s;
        DPRINTF(X86, "%s : %s: The address is %#x\n", instMnem, mnemonic, EA);

        fault = xc->read(EA, (%(mem_acc_type)s%(mem_acc_size)s_t&)Mem, 0);

        return fault;
    }
}};

def template MicroLoadCompleteAcc {{
    Fault %(class_name)s::completeAcc(PacketPtr pkt,
            %(CPU_exec_context)s * xc,
            Trace::InstRecord * traceData) const
    {
        Fault fault = NoFault;

        %(op_decl)s;
        %(op_rd)s;

        Mem = pkt->get<typeof(Mem)>();
        %(code)s;

        if(fault == NoFault)
        {
            %(op_wb)s;
        }

        return fault;
    }
}};

// Store templates

def template MicroStoreExecute {{
    Fault %(class_name)s::execute(%(CPU_exec_context)s * xc,
            Trace::InstRecord *traceData) const
    {
        Fault fault = NoFault;

        Addr EA;
        %(op_decl)s;
        %(op_rd)s;
        %(ea_code)s;
        DPRINTF(X86, "%s : %s: The address is %#x\n", instMnem, mnemonic, EA);

        %(code)s;

        if(fault == NoFault)
        {
            fault = xc->write((%(mem_acc_type)s%(mem_acc_size)s_t)Mem,
                    EA, 0, 0);
        }
        if(fault == NoFault)
        {
            %(op_wb)s;
        }

        return fault;
    }
}};

def template MicroStoreInitiateAcc {{
    Fault %(class_name)s::initiateAcc(%(CPU_exec_context)s * xc,
            Trace::InstRecord * traceData) const
    {
        Fault fault = NoFault;

        Addr EA;
        %(op_decl)s;
        %(op_rd)s;
        %(ea_code)s;
        DPRINTF(X86, "%s : %s: The address is %#x\n", instMnem, mnemonic, EA);

        %(code)s;

        if(fault == NoFault)
        {
            fault = xc->write((%(mem_acc_type)s%(mem_acc_size)s_t)Mem,
                    EA, 0, 0);
        }
        if(fault == NoFault)
        {
            %(op_wb)s;
        }
        return fault;
    }
}};

def template MicroStoreCompleteAcc {{
    Fault %(class_name)s::completeAcc(PacketPtr, %(CPU_exec_context)s * xc,
            Trace::InstRecord * traceData) const
    {
        return NoFault;
    }
}};

// Common templates

//This delcares the initiateAcc function in memory operations
def template InitiateAccDeclare {{
    Fault initiateAcc(%(CPU_exec_context)s *, Trace::InstRecord *) const;
}};

//This declares the completeAcc function in memory operations
def template CompleteAccDeclare {{
    Fault completeAcc(PacketPtr, %(CPU_exec_context)s *, Trace::InstRecord *) const;
}};

def template MicroLdStOpDeclare {{
    class %(class_name)s : public %(base_class)s
    {
      protected:
        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

        %(InitiateAccDeclare)s

        %(CompleteAccDeclare)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,
                _scale, _index, _base,
                _disp, _segment, _data,
                _dataSize, _addressSize, %(op_class)s)
    {
        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,
                _scale, _index, _base,
                _disp, _segment, _data,
                _dataSize, _addressSize, %(op_class)s)
    {
        buildMe();
    }
}};

let {{
    class LdStOp(X86Microop):
        def __init__(self, data, segment, addr, disp):
            self.data = data
            [self.scale, self.index, self.base] = addr
            self.disp = disp
            self.segment = segment
            self.dataSize = "env.dataSize"
            self.addressSize = "env.addressSize"

        def getAllocator(self, *microFlags):
            allocator = '''new %(class_name)s(machInst, mnemonic
                    %(flags)s, %(scale)s, %(index)s, %(base)s,
                    %(disp)s, %(segment)s, %(data)s,
                    %(dataSize)s, %(addressSize)s)''' % {
                "class_name" : self.className,
                "flags" : self.microFlagsText(microFlags),
                "scale" : self.scale, "index" : self.index,
                "base" : self.base,
                "disp" : self.disp,
                "segment" : self.segment, "data" : self.data,
                "dataSize" : self.dataSize, "addressSize" : self.addressSize}
            return allocator
}};

let {{

    # Make these empty strings so that concatenating onto
    # them will always work.
    header_output = ""
    decoder_output = ""
    exec_output = ""

    calculateEA = "EA = scale * Index + Base + disp;"

    def defineMicroLoadOp(mnemonic, code):
        global header_output
        global decoder_output
        global exec_output
        global microopClasses
        Name = mnemonic
        name = mnemonic.lower()

        # Build up the all register version of this micro op
        iop = InstObjParams(name, Name, 'LdStOp',
                {"code": code, "ea_code": calculateEA})
        header_output += MicroLdStOpDeclare.subst(iop)
        decoder_output += MicroLdStOpConstructor.subst(iop)
        exec_output += MicroLoadExecute.subst(iop)
        exec_output += MicroLoadInitiateAcc.subst(iop)
        exec_output += MicroLoadCompleteAcc.subst(iop)

        class LoadOp(LdStOp):
            def __init__(self, data, segment, addr, disp = 0):
                super(LoadOp, self).__init__(data, segment, addr, disp)
                self.className = Name
                self.mnemonic = name

        microopClasses[name] = LoadOp

    defineMicroLoadOp('Ld', 'Data = merge(Data, Mem, dataSize);')

    def defineMicroStoreOp(mnemonic, code):
        global header_output
        global decoder_output
        global exec_output
        global microopClasses
        Name = mnemonic
        name = mnemonic.lower()

        # Build up the all register version of this micro op
        iop = InstObjParams(name, Name, 'LdStOp',
                {"code": code, "ea_code": calculateEA})
        header_output += MicroLdStOpDeclare.subst(iop)
        decoder_output += MicroLdStOpConstructor.subst(iop)
        exec_output += MicroStoreExecute.subst(iop)
        exec_output += MicroStoreInitiateAcc.subst(iop)
        exec_output += MicroStoreCompleteAcc.subst(iop)

        class StoreOp(LdStOp):
            def __init__(self, data, addr, segment):
                super(LoadOp, self).__init__(data, addr, segment)
                self.className = Name
                self.mnemonic = name

        microopClasses[name] = StoreOp

    defineMicroLoadOp('St', 'Mem = Data;')
}};