xref: /gem5/src/arch/mips/isa/formats/int.isa

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

// Copyright (c) 2003-2006 The Regents of The University of Michigan
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
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// 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
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// 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
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Korey Sewell

////////////////////////////////////////////////////////////////////
//
// Integer operate instructions
//
output header {{
#include <iostream>
    using namespace std;
        /**
         * Base class for integer operations.
         */
        class IntOp : public MipsStaticInst
        {
                protected:

                /// Constructor
                IntOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
                                MipsStaticInst(mnem, _machInst, __opClass)
                {
                }

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


        class HiLoOp: public IntOp
        {
                protected:

                /// Constructor
                HiLoOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
                                IntOp(mnem, _machInst, __opClass)
                {
                }

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

        class HiLoMiscOp: public HiLoOp
        {
                protected:

                /// Constructor
                HiLoMiscOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
                                HiLoOp(mnem, _machInst, __opClass)
                {
                }

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


        class IntImmOp : public MipsStaticInst
        {
                protected:

                int16_t imm;
                int32_t sextImm;
                uint32_t zextImm;

                /// Constructor
                IntImmOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
                    MipsStaticInst(mnem, _machInst, __opClass),imm(INTIMM),
                    sextImm(INTIMM),zextImm(0x0000FFFF & INTIMM)
                {
                    //If Bit 15 is 1 then Sign Extend
                    int32_t temp = sextImm & 0x00008000;
                    if (temp > 0 && mnemonic != "lui") {
                        sextImm |= 0xFFFF0000;
                    }
                }

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


        };

}};

// HiLo<Misc> instruction class execute method template.
// Mainly to get instruction trace data to print out
// correctly
def template HiLoExecute {{
        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
        {
                Fault fault = NoFault;

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

                if(fault == NoFault)
                {
                    %(op_wb)s;
                    //If there are 2 Destination Registers then
                    //concatenate the values for the traceData
                    if(traceData && _numDestRegs == 2) {
                        uint64_t hilo_final_val = (uint64_t)HI << 32 | LO;
                        traceData->setData(hilo_final_val);
                    }
                }
                return fault;
        }
}};

//Outputs to decoder.cc
output decoder {{
        std::string IntOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
        {
            std::stringstream ss;

            ccprintf(ss, "%-10s ", mnemonic);

            // just print the first dest... if there's a second one,
            // it's generally implicit
            if (_numDestRegs > 0) {
                printReg(ss, _destRegIdx[0]);
                ss << ", ";
            }

            // just print the first two source regs... if there's
            // a third one, it's a read-modify-write dest (Rc),
            // e.g. for CMOVxx
            if (_numSrcRegs > 0) {
                printReg(ss, _srcRegIdx[0]);
            }

            if (_numSrcRegs > 1) {
                ss << ", ";
                printReg(ss, _srcRegIdx[1]);
            }

            return ss.str();
        }

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

            ccprintf(ss, "%-10s ", mnemonic);

            //Destination Registers are implicit for HI/LO ops
            if (_numSrcRegs > 0) {
                printReg(ss, _srcRegIdx[0]);
            }

            if (_numSrcRegs > 1) {
                ss << ", ";
                printReg(ss, _srcRegIdx[1]);
            }

            return ss.str();
        }

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

            ccprintf(ss, "%-10s ", mnemonic);

            if (_numDestRegs > 0 && _destRegIdx[0] < 32) {
                printReg(ss, _destRegIdx[0]);
            } else if (_numSrcRegs > 0 && _srcRegIdx[0] < 32) {
                printReg(ss, _srcRegIdx[0]);
            }

            return ss.str();
        }

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

            ccprintf(ss, "%-10s ", mnemonic);

            if (_numDestRegs > 0) {
                printReg(ss, _destRegIdx[0]);
            }

            ss << ", ";

            if (_numSrcRegs > 0) {
                printReg(ss, _srcRegIdx[0]);
                ss << ", ";
            }

            if( mnemonic == "lui")
                ccprintf(ss, "0x%x ", sextImm);
            else
                ss << (int) sextImm;

            return ss.str();
        }

}};

def format IntOp(code, *opt_flags) {{
    iop = InstObjParams(name, Name, 'IntOp', CodeBlock(code), opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = OperateNopCheckDecode.subst(iop)
    exec_output = BasicExecute.subst(iop)
}};

def format IntImmOp(code, *opt_flags) {{
    iop = InstObjParams(name, Name, 'IntImmOp', CodeBlock(code), opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = OperateNopCheckDecode.subst(iop)
    exec_output = BasicExecute.subst(iop)
}};

def format HiLoOp(code, *opt_flags) {{
    if '.sd' in code:
        code = 'int64_t ' + code
    elif '.ud' in code:
        code = 'uint64_t ' + code

    code += 'HI = val<63:32>;\n'
    code += 'LO = val<31:0>;\n'

    iop = InstObjParams(name, Name, 'HiLoOp', CodeBlock(code), opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = OperateNopCheckDecode.subst(iop)
    exec_output = HiLoExecute.subst(iop)
}};

def format HiLoMiscOp(code, *opt_flags) {{
    iop = InstObjParams(name, Name, 'HiLoMiscOp', CodeBlock(code), opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = OperateNopCheckDecode.subst(iop)
    exec_output = HiLoExecute.subst(iop)
}};