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

// Copyright (c) 2015 Riscv Developers
// Copyright (c) 2016 The University of Virginia
// 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,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Alec Roelke

def template MacroInitiateAcc {{
    Fault initiateAcc(ExecContext *xc, Trace::InstRecord *traceData) const
    {
        panic("Tried to execute a macroop directly!\n");
        return NoFault;
    }
}};

def template MacroCompleteAcc {{
    Fault completeAcc(PacketPtr pkt, ExecContext *xc,
        Trace::InstRecord *traceData) const
    {
        panic("Tried to execute a macroop directly!\n");
        return NoFault;
    }
}};

def template MacroExecute {{
    Fault execute(ExecContext *xc, Trace::InstRecord *traceData) const
    {
        panic("Tried to execute a macroop directly!\n");
        return NoFault;
    }
}};

output header {{
    /**
     * Base class for all RISC-V Macroops
     */
    class RiscvMacroInst : public RiscvStaticInst
    {
    protected:
        std::vector<StaticInstPtr> microops;

        // Constructor
        RiscvMacroInst(const char *mnem, ExtMachInst _machInst,
            OpClass __opClass)
                : RiscvStaticInst(mnem, _machInst, __opClass)
        {
            flags[IsMacroop] = true;
        }

        ~RiscvMacroInst()
        {
            microops.clear();
        }

        StaticInstPtr fetchMicroop(MicroPC upc) const
        {
            return microops[upc];
        }

        %(MacroInitiateAcc)s

        %(MacroCompleteAcc)s

        %(MacroExecute)s
    };

    /**
     * Base class for all RISC-V Microops
     */
    class RiscvMicroInst : public RiscvStaticInst
    {
    protected:
        // Constructor
        RiscvMicroInst(const char *mnem, ExtMachInst _machInst,
            OpClass __opClass)
                : RiscvStaticInst(mnem, _machInst, __opClass)
        {
            flags[IsMicroop] = true;
        }

        void advancePC(RiscvISA::PCState &pcState) const
        {
            if (flags[IsLastMicroop]) {
                pcState.uEnd();
            } else {
                pcState.uAdvance();
            }
        }
    };
}};