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

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

// Copyright (c) 2007 MIPS Technologies, Inc.
// 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: 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 override;
        };


        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 override;
        };

        class HiLoRsSelOp: public HiLoOp
        {
                protected:

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

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

        class HiLoRdSelOp: public HiLoOp
        {
                protected:

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

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

        class HiLoRdSelValOp: public HiLoOp
        {
                protected:

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

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

        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 && strcmp(mnemonic,"lui") != 0) {
                        sextImm |= 0xFFFF0000;
                    }
                }

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

}};

// HiLo instruction class execute method template.
def template HiLoExecute {{
        Fault %(class_name)s::execute(
            ExecContext *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;
                }
                return fault;
        }
}};

// HiLoRsSel instruction class execute method template.
def template HiLoRsSelExecute {{
        Fault %(class_name)s::execute(
            ExecContext *xc, Trace::InstRecord *traceData) const
        {
                Fault fault = NoFault;

                %(op_decl)s;

                if( ACSRC > 0 && !isDspEnabled(xc) )
                {
                    fault = std::make_shared<DspStateDisabledFault>();
                }
                else
                {
                    %(op_rd)s;
                    %(code)s;
                }

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

// HiLoRdSel instruction class execute method template.
def template HiLoRdSelExecute {{
        Fault %(class_name)s::execute(
            ExecContext *xc, Trace::InstRecord *traceData) const
        {
                Fault fault = NoFault;

                %(op_decl)s;

                if( ACDST > 0 && !isDspEnabled(xc) )
                {
                    fault = std::make_shared<DspStateDisabledFault>();
                }
                else
                {
                    %(op_rd)s;
                    %(code)s;
                }

                if(fault == NoFault)
                {
                    %(op_wb)s;
                }
                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 HiLoRsSelOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
        {
            std::stringstream ss;

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

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

            return ss.str();
        }

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

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

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

            return ss.str();
        }

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

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

            if (_numDestRegs > 0 && _destRegIdx[0].index() < 32) {
                printReg(ss, _destRegIdx[0]);
            } else if (_numSrcRegs > 0 && _srcRegIdx[0].index() < 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(strcmp(mnemonic,"lui") == 0)
                ccprintf(ss, "0x%x ", sextImm);
            else
                ss << (int) sextImm;

            return ss.str();
        }

}};

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

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

def format HiLoRsSelOp(code, *opt_flags) {{
    iop = InstObjParams(name, Name, 'HiLoRsSelOp', code, opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = BasicDecode.subst(iop)
    exec_output = HiLoRsSelExecute.subst(iop)
}};

def format HiLoRdSelOp(code, *opt_flags) {{
    iop = InstObjParams(name, Name, 'HiLoRdSelOp', code, opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = BasicDecode.subst(iop)
    exec_output = HiLoRdSelExecute.subst(iop)
}};

def format HiLoRdSelValOp(code, *opt_flags) {{

    if '_sd' in code:
        code = 'int64_t ' + code
    elif '_ud' in code:
        code = 'uint64_t ' + code

    code += 'HI_RD_SEL = val<63:32>;\n'
    code += 'LO_RD_SEL = val<31:0>;\n'

    iop = InstObjParams(name, Name, 'HiLoRdSelOp', code, opt_flags)
    header_output = BasicDeclare.subst(iop)
    decoder_output = BasicConstructor.subst(iop)
    decode_block = BasicDecode.subst(iop)
    exec_output = HiLoRdSelExecute.subst(iop)
}};

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