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

// Copyright (c) 2007 The Hewlett-Packard Development Company
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// Authors: Gabe Black

//////////////////////////////////////////////////////////////////////////
//
// RegOp Microop templates
//
//////////////////////////////////////////////////////////////////////////

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

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

            //Write the resulting state to the execution context
            if(fault == NoFault)
            {
                %(op_wb)s;
            }
            return fault;
        }
}};

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

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

            //Write the resulting state to the execution context
            if(fault == NoFault)
            {
                %(op_wb)s;
            }
            return fault;
        }
}};

def template MicroRegOpDeclare {{
    class %(class_name)s : public %(base_class)s
    {
      protected:
        const RegIndex src1;
        const RegIndex src2;
        const RegIndex dest;
        const bool setStatus;
        const uint8_t dataSize;
        const uint8_t ext;
        void buildMe();

      public:
        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                RegIndex _src1, RegIndex _src2, RegIndex _dest,
                bool _setStatus, uint8_t _dataSize, uint8_t _ext);

        %(class_name)s(ExtMachInst _machInst,
                const char * instMnem,
                RegIndex _src1, RegIndex _src2, RegIndex _dest,
                bool _setStatus, uint8_t _dataSize, uint8_t _ext);

        %(BasicExecDeclare)s
    };
}};

def template MicroRegOpImmDeclare {{

    class %(class_name)sImm : public %(base_class)s
    {
      protected:
        const RegIndex src1;
        const uint8_t imm8;
        const RegIndex dest;
        const bool setStatus;
        const uint8_t dataSize;
        const uint8_t ext;
        void buildMe();

      public:
        %(class_name)sImm(ExtMachInst _machInst,
                const char * instMnem,
                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                RegIndex _src1, uint8_t _imm8, RegIndex _dest,
                bool _setStatus, uint8_t _dataSize, uint8_t _ext);

        %(class_name)sImm(ExtMachInst _machInst,
                const char * instMnem,
                RegIndex _src1, uint8_t _imm8, RegIndex _dest,
                bool _setStatus, uint8_t _dataSize, uint8_t _ext);

        %(BasicExecDeclare)s
    };
}};

def template MicroRegOpConstructor {{

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

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            RegIndex _src1, RegIndex _src2, RegIndex _dest,
            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                false, false, false, false, %(op_class)s),
                src1(_src1), src2(_src2), dest(_dest),
                setStatus(_setStatus), dataSize(_dataSize), ext(_ext)
    {
        buildMe();
    }

    inline %(class_name)s::%(class_name)s(
            ExtMachInst machInst, const char * instMnem,
            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
            RegIndex _src1, RegIndex _src2, RegIndex _dest,
            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                isMicro, isDelayed, isFirst, isLast, %(op_class)s),
                src1(_src1), src2(_src2), dest(_dest),
                setStatus(_setStatus), dataSize(_dataSize), ext(_ext)
    {
        buildMe();
    }
}};

def template MicroRegOpImmConstructor {{

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

    inline %(class_name)sImm::%(class_name)sImm(
            ExtMachInst machInst, const char * instMnem,
            RegIndex _src1, uint8_t _imm8, RegIndex _dest,
            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                false, false, false, false, %(op_class)s),
                src1(_src1), imm8(_imm8), dest(_dest),
                setStatus(_setStatus), dataSize(_dataSize), ext(_ext)
    {
        buildMe();
    }

    inline %(class_name)sImm::%(class_name)sImm(
            ExtMachInst machInst, const char * instMnem,
            bool isMicro, bool isDelayed, bool isFirst, bool isLast,
            RegIndex _src1, uint8_t _imm8, RegIndex _dest,
            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
        %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                isMicro, isDelayed, isFirst, isLast, %(op_class)s),
                src1(_src1), imm8(_imm8), dest(_dest),
                setStatus(_setStatus), dataSize(_dataSize), ext(_ext)
    {
        buildMe();
    }
}};

let {{
    class RegOp(X86Microop):
        def __init__(self, dest, src1, src2):
            self.dest = dest
            self.src1 = src1
            self.src2 = src2
            self.setStatus = False
            self.dataSize = 1
            self.ext = 0

        def getAllocator(self, *microFlags):
            allocator = '''new %(class_name)s(machInst, %(mnemonic)s,
                    %(flags)s %(src1)s, %(src2)s, %(dest)s,
                    %(setStatus)s, %(dataSize)s, %(ext)s)''' % {
                "class_name" : self.className,
                "mnemonic" : self.mnemonic,
                "flags" : self.microFlagsText(microFlags),
                "src1" : self.src1, "src2" : self.src2,
                "dest" : self.dest,
                "setStatus" : self.setStatus,
                "dataSize" : self.dataSize,
                "ext" : self.ext}

    class RegOpImm(X86Microop):
        def __init__(self, dest, src1, imm):
            self.dest = dest
            self.src1 = src1
            self.imm = imm
            self.setStatus = False
            self.dataSize = 1
            self.ext = 0

        def getAllocator(self, *microFlags):
            allocator = '''new %(class_name)s(machInst, %(mnemonic)s,
                    %(flags)s %(src1)s, %(imm8)s, %(dest)s,
                    %(setStatus)s, %(dataSize)s, %(ext)s)''' % {
                "class_name" : self.className,
                "mnemonic" : self.mnemonic,
                "flags" : self.microFlagsText(microFlags),
                "src1" : self.src1, "imm8" : self.imm8,
                "dest" : self.dest,
                "setStatus" : self.setStatus,
                "dataSize" : self.dataSize,
                "ext" : self.ext}
}};

let {{

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

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

        # Find op2 in each of the instruction definitions. Create two versions
        # of the code, one with an integer operand, and one with an immediate
        # operand.
        matcher = re.compile("op2(?P<typeQual>\\.\\w+)?")
        regCode = matcher.sub("SrcReg2", code)
        immCode = matcher.sub("imm8", code)

        # Build up the all register version of this micro op
        iop = InstObjParams(name, Name, 'X86MicroOpBase', {"code" : regCode})
        header_output += MicroRegOpDeclare.subst(iop)
        decoder_output += MicroRegOpConstructor.subst(iop)
        exec_output += MicroRegOpExecute.subst(iop)

        class RegOpChild(RegOp):
            def __init__(self, dest, src1, src2):
                super(RegOpChild, self).__init__(dest, src1, src2)
                self.className = Name
                self.mnemonic = name

        microopClasses[name] = RegOpChild

        # Build up the immediate version of this micro op
        iop = InstObjParams(name + "i", Name,
                'X86MicroOpBase', {"code" : immCode})
        header_output += MicroRegOpImmDeclare.subst(iop)
        decoder_output += MicroRegOpImmConstructor.subst(iop)
        exec_output += MicroRegOpImmExecute.subst(iop)

        class RegOpImmChild(RegOpImm):
            def __init__(self, dest, src1, imm):
                super(RegOpImmChild, self).__init__(dest, src1, imm)
                self.className = Name + "Imm"
                self.mnemonic = name + "i"

        microopClasses[name + "i"] = RegOpChild

    defineMicroRegOp('Add', 'DestReg = merge(DestReg, SrcReg1 + op2, dataSize)') #Needs to set OF,CF,SF
    defineMicroRegOp('Or', 'DestReg = merge(DestReg, SrcReg1 | op2, dataSize)')
    defineMicroRegOp('Adc', 'DestReg = merge(DestReg, SrcReg1 + op2, dataSize)') #Needs to add in CF, set OF,CF,SF
    defineMicroRegOp('Sbb', 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)') #Needs to subtract CF, set OF,CF,SF
    defineMicroRegOp('And', 'DestReg = merge(DestReg, SrcReg1 & op2, dataSize)')
    defineMicroRegOp('Sub', 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)') #Needs to set OF,CF,SF
    defineMicroRegOp('Xor', 'DestReg = merge(DestReg, SrcReg1 ^ op2, dataSize)')
    defineMicroRegOp('Cmp', 'DestReg = merge(DestReg, DestReg - op2, dataSize)') #Needs to set OF,CF,SF and not DestReg
    defineMicroRegOp('Mov', 'DestReg = merge(SrcReg1, op2, dataSize)')

}};