xref: /gem5/src/arch/arm/isa/insts/misc.isa

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

// Copyright (c) 2010-2013,2017 ARM Limited
// All rights reserved
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// 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: Gabe Black

let {{

    svcCode = '''
    fault = std::make_shared<SupervisorCall>(machInst, imm);
    '''

    svcIop = InstObjParams("svc", "Svc", "ImmOp",
                           { "code": svcCode,
                             "predicate_test": predicateTest },
                           ["IsSyscall", "IsNonSpeculative", "IsSerializeAfter"])
    header_output = ImmOpDeclare.subst(svcIop)
    decoder_output = ImmOpConstructor.subst(svcIop)
    exec_output = PredOpExecute.subst(svcIop)

    smcCode = '''
    HCR  hcr  = Hcr;
    CPSR cpsr = Cpsr;
    SCR  scr  = Scr;

    if ((cpsr.mode != MODE_USER) && FullSystem) {
        if (ArmSystem::haveVirtualization(xc->tcBase()) &&
            !inSecureState(scr, cpsr) && (cpsr.mode != MODE_HYP) && hcr.tsc) {
            fault = std::make_shared<HypervisorTrap>(machInst, 0,
                                                     EC_SMC_TO_HYP);
        } else {
            if (scr.scd) {
                fault = disabledFault();
            } else {
                fault = std::make_shared<SecureMonitorCall>(machInst);
            }
        }
    } else {
        fault = disabledFault();
    }
    '''

    smcIop = InstObjParams("smc", "Smc", "PredOp",
                           { "code": smcCode,
                             "predicate_test": predicateTest },
                           ["IsNonSpeculative", "IsSerializeAfter"])
    header_output += BasicDeclare.subst(smcIop)
    decoder_output += BasicConstructor.subst(smcIop)
    exec_output += PredOpExecute.subst(smcIop)

    hvcCode = '''
    CPSR cpsr = Cpsr;
    SCR  scr  = Scr;

    // Filter out the various cases where this instruction isn't defined
    if (!FullSystem || !ArmSystem::haveVirtualization(xc->tcBase()) ||
        (cpsr.mode == MODE_USER) ||
        (ArmSystem::haveSecurity(xc->tcBase()) && (!scr.ns || !scr.hce))) {
        fault = disabledFault();
    } else {
        fault = std::make_shared<HypervisorCall>(machInst, imm);
    }
    '''

    hvcIop = InstObjParams("hvc", "Hvc", "ImmOp",
                           { "code": hvcCode,
                             "predicate_test": predicateTest },
                           ["IsNonSpeculative", "IsSerializeAfter"])
    header_output += ImmOpDeclare.subst(hvcIop)
    decoder_output += ImmOpConstructor.subst(hvcIop)
    exec_output += PredOpExecute.subst(hvcIop)

    eretCode = '''
        SCTLR sctlr   = Sctlr;
        CPSR old_cpsr = Cpsr;
        old_cpsr.nz   = CondCodesNZ;
        old_cpsr.c    = CondCodesC;
        old_cpsr.v    = CondCodesV;
        old_cpsr.ge   = CondCodesGE;

        CPSR new_cpsr = cpsrWriteByInstr(old_cpsr, Spsr, Scr, Nsacr, 0xF,
                            true, sctlr.nmfi, xc->tcBase());
        Cpsr        = ~CondCodesMask & new_cpsr;
        CondCodesNZ = new_cpsr.nz;
        CondCodesC  = new_cpsr.c;
        CondCodesV  = new_cpsr.v;
        CondCodesGE = new_cpsr.ge;

        NextThumb = (new_cpsr).t;
                    NextJazelle = (new_cpsr).j;
                    NextItState = (((new_cpsr).it2 << 2) & 0xFC)
                        | ((new_cpsr).it1 & 0x3);

        NPC = (old_cpsr.mode == MODE_HYP) ? ElrHyp : LR;
    '''

    eretIop = InstObjParams("eret", "Eret", "PredOp",
                           { "code": eretCode,
                             "predicate_test": predicateTest },
                           ["IsNonSpeculative", "IsSerializeAfter",
                            "IsSquashAfter"])
    header_output += BasicDeclare.subst(eretIop)
    decoder_output += BasicConstructor.subst(eretIop)
    exec_output += PredOpExecute.subst(eretIop)



}};

let {{

    header_output = decoder_output = exec_output = ""

    mrsCpsrCode = '''
        CPSR cpsr = Cpsr;
        cpsr.nz = CondCodesNZ;
        cpsr.c = CondCodesC;
        cpsr.v = CondCodesV;
        cpsr.ge = CondCodesGE;
        Dest = cpsr & 0xF8FF03DF
    '''

    mrsCpsrIop = InstObjParams("mrs", "MrsCpsr", "MrsOp",
                               { "code": mrsCpsrCode,
                                 "predicate_test": condPredicateTest },
                               ["IsSerializeBefore"])
    header_output += MrsDeclare.subst(mrsCpsrIop)
    decoder_output += MrsConstructor.subst(mrsCpsrIop)
    exec_output += PredOpExecute.subst(mrsCpsrIop)

    mrsSpsrCode = "Dest = Spsr"
    mrsSpsrIop = InstObjParams("mrs", "MrsSpsr", "MrsOp",
                               { "code": mrsSpsrCode,
                                 "predicate_test": predicateTest },
                               ["IsSerializeBefore"])
    header_output += MrsDeclare.subst(mrsSpsrIop)
    decoder_output += MrsConstructor.subst(mrsSpsrIop)
    exec_output += PredOpExecute.subst(mrsSpsrIop)

    mrsBankedRegCode = '''
        bool isIntReg;
        int  regIdx;

        if (decodeMrsMsrBankedReg(byteMask, r, isIntReg, regIdx, Cpsr, Scr, Nsacr)) {
            if (isIntReg) {
                Dest = DecodedBankedIntReg;
            } else {
                Dest = xc->readMiscReg(regIdx);
            }
        } else {
            return std::make_shared<UndefinedInstruction>(machInst, false,
                                                          mnemonic);
        }
    '''
    mrsBankedRegIop = InstObjParams("mrs", "MrsBankedReg", "MrsOp",
                                    { "code": mrsBankedRegCode,
                                      "predicate_test": predicateTest },
                                    ["IsSerializeBefore"])
    header_output += MrsBankedRegDeclare.subst(mrsBankedRegIop)
    decoder_output += MrsBankedRegConstructor.subst(mrsBankedRegIop)
    exec_output += PredOpExecute.subst(mrsBankedRegIop)

    msrBankedRegCode = '''
        bool isIntReg;
        int  regIdx;

        if (decodeMrsMsrBankedReg(byteMask, r, isIntReg, regIdx, Cpsr, Scr, Nsacr)) {
            if (isIntReg) {
                // This is a bit nasty, you would have thought that
                // DecodedBankedIntReg wouldn't be written to unless the
                // conditions on the IF statements above are met, however if
                // you look at the generated C code you'll find that they are.
                // However this is safe as DecodedBankedIntReg (which is used
                // in operands.isa to get the index of DecodedBankedIntReg)
                // will return INTREG_DUMMY if its not a valid integer
                // register, so redirecting the write to somewhere we don't
                // care about.
                DecodedBankedIntReg = Op1;
            } else {
                xc->setMiscReg(regIdx, Op1);
            }
        } else {
            return std::make_shared<UndefinedInstruction>(machInst, false,
                                                          mnemonic);
        }
    '''
    msrBankedRegIop = InstObjParams("msr", "MsrBankedReg", "MsrRegOp",
                                    { "code": msrBankedRegCode,
                                      "predicate_test": predicateTest },
                                    ["IsSerializeAfter", "IsNonSpeculative"])
    header_output += MsrBankedRegDeclare.subst(msrBankedRegIop)
    decoder_output += MsrBankedRegConstructor.subst(msrBankedRegIop)
    exec_output += PredOpExecute.subst(msrBankedRegIop)

    msrCpsrRegCode = '''
        SCTLR sctlr = Sctlr;
        CPSR old_cpsr = Cpsr;
        old_cpsr.nz = CondCodesNZ;
        old_cpsr.c = CondCodesC;
        old_cpsr.v = CondCodesV;
        old_cpsr.ge = CondCodesGE;

        CPSR new_cpsr =
            cpsrWriteByInstr(old_cpsr, Op1, Scr, Nsacr, byteMask, false,
                             sctlr.nmfi, xc->tcBase());
        Cpsr = ~CondCodesMask & new_cpsr;
        CondCodesNZ = new_cpsr.nz;
        CondCodesC = new_cpsr.c;
        CondCodesV = new_cpsr.v;
        CondCodesGE = new_cpsr.ge;
    '''
    msrCpsrRegIop = InstObjParams("msr", "MsrCpsrReg", "MsrRegOp",
                                  { "code": msrCpsrRegCode,
                                    "predicate_test": condPredicateTest },
                                  ["IsSerializeAfter","IsNonSpeculative"])
    header_output += MsrRegDeclare.subst(msrCpsrRegIop)
    decoder_output += MsrRegConstructor.subst(msrCpsrRegIop)
    exec_output += PredOpExecute.subst(msrCpsrRegIop)

    msrSpsrRegCode = "Spsr = spsrWriteByInstr(Spsr, Op1, byteMask, false);"
    msrSpsrRegIop = InstObjParams("msr", "MsrSpsrReg", "MsrRegOp",
                                  { "code": msrSpsrRegCode,
                                    "predicate_test": predicateTest },
                                  ["IsSerializeAfter","IsNonSpeculative"])
    header_output += MsrRegDeclare.subst(msrSpsrRegIop)
    decoder_output += MsrRegConstructor.subst(msrSpsrRegIop)
    exec_output += PredOpExecute.subst(msrSpsrRegIop)

    msrCpsrImmCode = '''
        SCTLR sctlr = Sctlr;
        CPSR old_cpsr = Cpsr;
        old_cpsr.nz = CondCodesNZ;
        old_cpsr.c = CondCodesC;
        old_cpsr.v = CondCodesV;
        old_cpsr.ge = CondCodesGE;
        CPSR new_cpsr =
            cpsrWriteByInstr(old_cpsr, imm, Scr, Nsacr, byteMask, false,
                             sctlr.nmfi, xc->tcBase());
        Cpsr = ~CondCodesMask & new_cpsr;
        CondCodesNZ = new_cpsr.nz;
        CondCodesC = new_cpsr.c;
        CondCodesV = new_cpsr.v;
        CondCodesGE = new_cpsr.ge;
    '''
    msrCpsrImmIop = InstObjParams("msr", "MsrCpsrImm", "MsrImmOp",
                                  { "code": msrCpsrImmCode,
                                    "predicate_test": condPredicateTest },
                                  ["IsSerializeAfter","IsNonSpeculative"])
    header_output += MsrImmDeclare.subst(msrCpsrImmIop)
    decoder_output += MsrImmConstructor.subst(msrCpsrImmIop)
    exec_output += PredOpExecute.subst(msrCpsrImmIop)

    msrSpsrImmCode = "Spsr = spsrWriteByInstr(Spsr, imm, byteMask, false);"
    msrSpsrImmIop = InstObjParams("msr", "MsrSpsrImm", "MsrImmOp",
                                  { "code": msrSpsrImmCode,
                                    "predicate_test": predicateTest },
                                  ["IsSerializeAfter","IsNonSpeculative"])
    header_output += MsrImmDeclare.subst(msrSpsrImmIop)
    decoder_output += MsrImmConstructor.subst(msrSpsrImmIop)
    exec_output += PredOpExecute.subst(msrSpsrImmIop)

    revCode = '''
    uint32_t val = Op1;
    Dest = swap_byte(val);
    '''
    revIop = InstObjParams("rev", "Rev", "RegRegOp",
                           { "code": revCode,
                             "predicate_test": predicateTest }, [])
    header_output += RegRegOpDeclare.subst(revIop)
    decoder_output += RegRegOpConstructor.subst(revIop)
    exec_output += PredOpExecute.subst(revIop)

    rev16Code = '''
    uint32_t val = Op1;
    Dest = (bits(val, 15, 8) << 0) |
           (bits(val, 7, 0) << 8) |
           (bits(val, 31, 24) << 16) |
           (bits(val, 23, 16) << 24);
    '''
    rev16Iop = InstObjParams("rev16", "Rev16", "RegRegOp",
                             { "code": rev16Code,
                               "predicate_test": predicateTest }, [])
    header_output += RegRegOpDeclare.subst(rev16Iop)
    decoder_output += RegRegOpConstructor.subst(rev16Iop)
    exec_output += PredOpExecute.subst(rev16Iop)

    revshCode = '''
    uint16_t val = Op1;
    Dest = sext<16>(swap_byte(val));
    '''
    revshIop = InstObjParams("revsh", "Revsh", "RegRegOp",
                             { "code": revshCode,
                               "predicate_test": predicateTest }, [])
    header_output += RegRegOpDeclare.subst(revshIop)
    decoder_output += RegRegOpConstructor.subst(revshIop)
    exec_output += PredOpExecute.subst(revshIop)

    rbitCode = '''
    uint8_t *opBytes = (uint8_t *)&Op1;
    uint32_t resTemp;
    uint8_t *destBytes = (uint8_t *)&resTemp;
    // This reverses the bytes and bits of the input, or so says the
    // internet.
    for (int i = 0; i < 4; i++) {
        uint32_t temp = opBytes[i];
        temp = (temp * 0x0802 & 0x22110) | (temp * 0x8020 & 0x88440);
        destBytes[3 - i] = (temp * 0x10101) >> 16;
    }
    Dest = resTemp;
    '''
    rbitIop = InstObjParams("rbit", "Rbit", "RegRegOp",
                            { "code": rbitCode,
                              "predicate_test": predicateTest }, [])
    header_output += RegRegOpDeclare.subst(rbitIop)
    decoder_output += RegRegOpConstructor.subst(rbitIop)
    exec_output += PredOpExecute.subst(rbitIop)

    clzCode = '''
        Dest = (Op1 == 0) ? 32 : (31 - findMsbSet(Op1));
    '''
    clzIop = InstObjParams("clz", "Clz", "RegRegOp",
                           { "code": clzCode,
                             "predicate_test": predicateTest }, [])
    header_output += RegRegOpDeclare.subst(clzIop)
    decoder_output += RegRegOpConstructor.subst(clzIop)
    exec_output += PredOpExecute.subst(clzIop)

    ssatCode = '''
        int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
        int32_t res;
        if (satInt(res, operand, imm))
            CpsrQ = 1 << 27;
        Dest = res;
    '''
    ssatIop = InstObjParams("ssat", "Ssat", "RegImmRegShiftOp",
                            { "code": ssatCode,
                              "predicate_test": pickPredicate(ssatCode) }, [])
    header_output += RegImmRegShiftOpDeclare.subst(ssatIop)
    decoder_output += RegImmRegShiftOpConstructor.subst(ssatIop)
    exec_output += PredOpExecute.subst(ssatIop)

    usatCode = '''
        int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
        int32_t res;
        if (uSatInt(res, operand, imm))
            CpsrQ = 1 << 27;
        Dest = res;
    '''
    usatIop = InstObjParams("usat", "Usat", "RegImmRegShiftOp",
                            { "code": usatCode,
                              "predicate_test": pickPredicate(usatCode) }, [])
    header_output += RegImmRegShiftOpDeclare.subst(usatIop)
    decoder_output += RegImmRegShiftOpConstructor.subst(usatIop)
    exec_output += PredOpExecute.subst(usatIop)

    ssat16Code = '''
        int32_t res;
        uint32_t resTemp = 0;
        int32_t argLow = sext<16>(bits(Op1, 15, 0));
        int32_t argHigh = sext<16>(bits(Op1, 31, 16));
        if (satInt(res, argLow, imm))
            CpsrQ = 1 << 27;
        replaceBits(resTemp, 15, 0, res);
        if (satInt(res, argHigh, imm))
            CpsrQ = 1 << 27;
        replaceBits(resTemp, 31, 16, res);
        Dest = resTemp;
    '''
    ssat16Iop = InstObjParams("ssat16", "Ssat16", "RegImmRegOp",
                              { "code": ssat16Code,
                                "predicate_test": pickPredicate(ssat16Code) }, [])
    header_output += RegImmRegOpDeclare.subst(ssat16Iop)
    decoder_output += RegImmRegOpConstructor.subst(ssat16Iop)
    exec_output += PredOpExecute.subst(ssat16Iop)

    usat16Code = '''
        int32_t res;
        uint32_t resTemp = 0;
        int32_t argLow = sext<16>(bits(Op1, 15, 0));
        int32_t argHigh = sext<16>(bits(Op1, 31, 16));
        if (uSatInt(res, argLow, imm))
            CpsrQ = 1 << 27;
        replaceBits(resTemp, 15, 0, res);
        if (uSatInt(res, argHigh, imm))
            CpsrQ = 1 << 27;
        replaceBits(resTemp, 31, 16, res);
        Dest = resTemp;
    '''
    usat16Iop = InstObjParams("usat16", "Usat16", "RegImmRegOp",
                              { "code": usat16Code,
                                "predicate_test": pickPredicate(usat16Code) }, [])
    header_output += RegImmRegOpDeclare.subst(usat16Iop)
    decoder_output += RegImmRegOpConstructor.subst(usat16Iop)
    exec_output += PredOpExecute.subst(usat16Iop)

    sxtbIop = InstObjParams("sxtb", "Sxtb", "RegImmRegOp",
                            { "code":
                              "Dest = sext<8>((uint8_t)(Op1_ud >> imm));",
                              "predicate_test": predicateTest }, [])
    header_output += RegImmRegOpDeclare.subst(sxtbIop)
    decoder_output += RegImmRegOpConstructor.subst(sxtbIop)
    exec_output += PredOpExecute.subst(sxtbIop)

    sxtabIop = InstObjParams("sxtab", "Sxtab", "RegRegRegImmOp",
                             { "code":
                               '''
                                   Dest = sext<8>((uint8_t)(Op2_ud >> imm)) +
                                          Op1;
                               ''',
                               "predicate_test": predicateTest }, [])
    header_output += RegRegRegImmOpDeclare.subst(sxtabIop)
    decoder_output += RegRegRegImmOpConstructor.subst(sxtabIop)
    exec_output += PredOpExecute.subst(sxtabIop)

    sxtb16Code = '''
    uint32_t resTemp = 0;
    replaceBits(resTemp, 15, 0, sext<8>(bits(Op1, imm + 7, imm)));
    replaceBits(resTemp, 31, 16,
                sext<8>(bits(Op1, (imm + 23) % 32, (imm + 16) % 32)));
    Dest = resTemp;
    '''
    sxtb16Iop = InstObjParams("sxtb16", "Sxtb16", "RegImmRegOp",
                              { "code": sxtb16Code,
                                "predicate_test": predicateTest }, [])
    header_output += RegImmRegOpDeclare.subst(sxtb16Iop)
    decoder_output += RegImmRegOpConstructor.subst(sxtb16Iop)
    exec_output += PredOpExecute.subst(sxtb16Iop)

    sxtab16Code = '''
    uint32_t resTemp = 0;
    replaceBits(resTemp, 15, 0, sext<8>(bits(Op2, imm + 7, imm)) +
                                        bits(Op1, 15, 0));
    replaceBits(resTemp, 31, 16,
                sext<8>(bits(Op2, (imm + 23) % 32, (imm + 16) % 32)) +
                bits(Op1, 31, 16));
    Dest = resTemp;
    '''
    sxtab16Iop = InstObjParams("sxtab16", "Sxtab16", "RegRegRegImmOp",
                               { "code": sxtab16Code,
                                 "predicate_test": predicateTest }, [])
    header_output += RegRegRegImmOpDeclare.subst(sxtab16Iop)
    decoder_output += RegRegRegImmOpConstructor.subst(sxtab16Iop)
    exec_output += PredOpExecute.subst(sxtab16Iop)

    sxthCode = '''
    uint64_t rotated = (uint32_t)Op1;
    rotated = (rotated | (rotated << 32)) >> imm;
    Dest = sext<16>((uint16_t)rotated);
    '''
    sxthIop = InstObjParams("sxth", "Sxth", "RegImmRegOp",
                              { "code": sxthCode,
                                "predicate_test": predicateTest }, [])
    header_output += RegImmRegOpDeclare.subst(sxthIop)
    decoder_output += RegImmRegOpConstructor.subst(sxthIop)
    exec_output += PredOpExecute.subst(sxthIop)

    sxtahCode = '''
    uint64_t rotated = (uint32_t)Op2;
    rotated = (rotated | (rotated << 32)) >> imm;
    Dest = sext<16>((uint16_t)rotated) + Op1;
    '''
    sxtahIop = InstObjParams("sxtah", "Sxtah", "RegRegRegImmOp",
                             { "code": sxtahCode,
                               "predicate_test": predicateTest }, [])
    header_output += RegRegRegImmOpDeclare.subst(sxtahIop)
    decoder_output += RegRegRegImmOpConstructor.subst(sxtahIop)
    exec_output += PredOpExecute.subst(sxtahIop)

    uxtbIop = InstObjParams("uxtb", "Uxtb", "RegImmRegOp",
                            { "code": "Dest = (uint8_t)(Op1_ud >> imm);",
                              "predicate_test": predicateTest }, [])
    header_output += RegImmRegOpDeclare.subst(uxtbIop)
    decoder_output += RegImmRegOpConstructor.subst(uxtbIop)
    exec_output += PredOpExecute.subst(uxtbIop)

    uxtabIop = InstObjParams("uxtab", "Uxtab", "RegRegRegImmOp",
                             { "code":
                               "Dest = (uint8_t)(Op2_ud >> imm) + Op1;",
                               "predicate_test": predicateTest }, [])
    header_output += RegRegRegImmOpDeclare.subst(uxtabIop)
    decoder_output += RegRegRegImmOpConstructor.subst(uxtabIop)
    exec_output += PredOpExecute.subst(uxtabIop)

    uxtb16Code = '''
    uint32_t resTemp = 0;
    replaceBits(resTemp, 15, 0, (uint8_t)(bits(Op1, imm + 7, imm)));
    replaceBits(resTemp, 31, 16,
                (uint8_t)(bits(Op1, (imm + 23) % 32, (imm + 16) % 32)));
    Dest = resTemp;
    '''
    uxtb16Iop = InstObjParams("uxtb16", "Uxtb16", "RegImmRegOp",
                              { "code": uxtb16Code,
                                "predicate_test": predicateTest }, [])
    header_output += RegImmRegOpDeclare.subst(uxtb16Iop)
    decoder_output += RegImmRegOpConstructor.subst(uxtb16Iop)
    exec_output += PredOpExecute.subst(uxtb16Iop)

    uxtab16Code = '''
    uint32_t resTemp = 0;
    replaceBits(resTemp, 15, 0, (uint8_t)(bits(Op2, imm + 7, imm)) +
                                        bits(Op1, 15, 0));
    replaceBits(resTemp, 31, 16,
                (uint8_t)(bits(Op2, (imm + 23) % 32, (imm + 16) % 32)) +
                bits(Op1, 31, 16));
    Dest = resTemp;
    '''
    uxtab16Iop = InstObjParams("uxtab16", "Uxtab16", "RegRegRegImmOp",
                               { "code": uxtab16Code,
                                 "predicate_test": predicateTest }, [])
    header_output += RegRegRegImmOpDeclare.subst(uxtab16Iop)
    decoder_output += RegRegRegImmOpConstructor.subst(uxtab16Iop)
    exec_output += PredOpExecute.subst(uxtab16Iop)

    uxthCode = '''
    uint64_t rotated = (uint32_t)Op1;
    rotated = (rotated | (rotated << 32)) >> imm;
    Dest = (uint16_t)rotated;
    '''
    uxthIop = InstObjParams("uxth", "Uxth", "RegImmRegOp",
                              { "code": uxthCode,
                                "predicate_test": predicateTest }, [])
    header_output += RegImmRegOpDeclare.subst(uxthIop)
    decoder_output += RegImmRegOpConstructor.subst(uxthIop)
    exec_output += PredOpExecute.subst(uxthIop)

    uxtahCode = '''
    uint64_t rotated = (uint32_t)Op2;
    rotated = (rotated | (rotated << 32)) >> imm;
    Dest = (uint16_t)rotated + Op1;
    '''
    uxtahIop = InstObjParams("uxtah", "Uxtah", "RegRegRegImmOp",
                             { "code": uxtahCode,
                               "predicate_test": predicateTest }, [])
    header_output += RegRegRegImmOpDeclare.subst(uxtahIop)
    decoder_output += RegRegRegImmOpConstructor.subst(uxtahIop)
    exec_output += PredOpExecute.subst(uxtahIop)

    selCode = '''
        uint32_t resTemp = 0;
        for (unsigned i = 0; i < 4; i++) {
            int low = i * 8;
            int high = low + 7;
            replaceBits(resTemp, high, low,
                        bits(CondCodesGE, i) ?
                            bits(Op1, high, low) : bits(Op2, high, low));
        }
        Dest = resTemp;
    '''
    selIop = InstObjParams("sel", "Sel", "RegRegRegOp",
                           { "code": selCode,
                             "predicate_test": predicateTest }, [])
    header_output += RegRegRegOpDeclare.subst(selIop)
    decoder_output += RegRegRegOpConstructor.subst(selIop)
    exec_output += PredOpExecute.subst(selIop)

    usad8Code = '''
        uint32_t resTemp = 0;
        for (unsigned i = 0; i < 4; i++) {
            int low = i * 8;
            int high = low + 7;
            int32_t diff = bits(Op1, high, low) -
                           bits(Op2, high, low);
            resTemp += ((diff < 0) ? -diff : diff);
        }
        Dest = resTemp;
    '''
    usad8Iop = InstObjParams("usad8", "Usad8", "RegRegRegOp",
                             { "code": usad8Code,
                               "predicate_test": predicateTest }, [])
    header_output += RegRegRegOpDeclare.subst(usad8Iop)
    decoder_output += RegRegRegOpConstructor.subst(usad8Iop)
    exec_output += PredOpExecute.subst(usad8Iop)

    usada8Code = '''
        uint32_t resTemp = 0;
        for (unsigned i = 0; i < 4; i++) {
            int low = i * 8;
            int high = low + 7;
            int32_t diff = bits(Op1, high, low) -
                           bits(Op2, high, low);
            resTemp += ((diff < 0) ? -diff : diff);
        }
        Dest = Op3 + resTemp;
    '''
    usada8Iop = InstObjParams("usada8", "Usada8", "RegRegRegRegOp",
                              { "code": usada8Code,
                                "predicate_test": predicateTest }, [])
    header_output += RegRegRegRegOpDeclare.subst(usada8Iop)
    decoder_output += RegRegRegRegOpConstructor.subst(usada8Iop)
    exec_output += PredOpExecute.subst(usada8Iop)

    bkptCode = 'return std::make_shared<PrefetchAbort>(PC, ArmFault::DebugEvent);\n'
    bkptIop = InstObjParams("bkpt", "BkptInst", "PredOp", bkptCode)
    header_output += BasicDeclare.subst(bkptIop)
    decoder_output += BasicConstructor.subst(bkptIop)
    exec_output += BasicExecute.subst(bkptIop)

    nopIop = InstObjParams("nop", "NopInst", "ArmStaticInst", "", ['IsNop'])
    header_output += BasicDeclare.subst(nopIop)
    decoder_output += BasicConstructor64.subst(nopIop)
    exec_output += BasicExecute.subst(nopIop)

    yieldIop = InstObjParams("yield", "YieldInst", "PredOp", \
            { "code" : "", "predicate_test" : predicateTest })
    header_output += BasicDeclare.subst(yieldIop)
    decoder_output += BasicConstructor.subst(yieldIop)
    exec_output += PredOpExecute.subst(yieldIop)

    wfeCode = '''
    HCR  hcr  = Hcr;
    CPSR cpsr = Cpsr;
    SCR  scr  = Scr64;
    SCTLR sctlr = Sctlr;

    // WFE Sleeps if SevMailbox==0 and no unmasked interrupts are pending,
    ThreadContext *tc = xc->tcBase();
    if (SevMailbox == 1) {
        SevMailbox = 0;
        PseudoInst::quiesceSkip(tc);
    } else if (tc->getCpuPtr()->getInterruptController(
                tc->threadId())->checkInterrupts(tc)) {
        PseudoInst::quiesceSkip(tc);
    } else if (cpsr.el == EL0 && !sctlr.ntwe) {
        PseudoInst::quiesceSkip(tc);
        fault = std::make_shared<SupervisorTrap>(machInst, 0x1E00001,
                                                 EC_TRAPPED_WFI_WFE);
    } else if (ArmSystem::haveVirtualization(tc) &&
               !inSecureState(scr, cpsr) && (cpsr.mode != MODE_HYP) &&
               hcr.twe) {
        PseudoInst::quiesceSkip(tc);
        fault = std::make_shared<HypervisorTrap>(machInst, 0x1E00001,
                                                 EC_TRAPPED_WFI_WFE);
    } else if (ArmSystem::haveSecurity(tc) && cpsr.el != EL3 && scr.twe) {
        PseudoInst::quiesceSkip(tc);
        fault = std::make_shared<SecureMonitorTrap>(machInst, 0x1E00001,
                                                    EC_TRAPPED_WFI_WFE);
    } else {
        PseudoInst::quiesce(tc);
    }
    '''
    wfePredFixUpCode = '''
    // WFE is predicated false, reset SevMailbox to reduce spurious sleeps
    // and SEV interrupts
    SevMailbox = 1;
    '''
    wfeIop = InstObjParams("wfe", "WfeInst", "PredOp", \
            { "code" : wfeCode,
              "pred_fixup" : wfePredFixUpCode,
              "predicate_test" : predicateTest },
            ["IsNonSpeculative", "IsQuiesce",
             "IsSerializeAfter", "IsUnverifiable"])
    header_output += BasicDeclare.subst(wfeIop)
    decoder_output += BasicConstructor.subst(wfeIop)
    exec_output += QuiescePredOpExecuteWithFixup.subst(wfeIop)

    wfiCode = '''
    HCR  hcr  = Hcr;
    CPSR cpsr = Cpsr;
    SCR  scr  = Scr64;
    SCTLR sctlr = Sctlr;

    // WFI doesn't sleep if interrupts are pending (masked or not)
    ThreadContext *tc = xc->tcBase();
    if (tc->getCpuPtr()->getInterruptController(
                tc->threadId())->checkWfiWake(hcr, cpsr, scr)) {
        PseudoInst::quiesceSkip(tc);
    } else if (cpsr.el == EL0 && !sctlr.ntwi) {
        PseudoInst::quiesceSkip(tc);
        fault = std::make_shared<SupervisorTrap>(machInst, 0x1E00000,
                                                 EC_TRAPPED_WFI_WFE);
    } else if (ArmSystem::haveVirtualization(tc) && hcr.twi &&
               (cpsr.mode != MODE_HYP) && !inSecureState(scr, cpsr)) {
        PseudoInst::quiesceSkip(tc);
        fault = std::make_shared<HypervisorTrap>(machInst, 0x1E00000,
                                                 EC_TRAPPED_WFI_WFE);
    } else if (ArmSystem::haveSecurity(tc) && cpsr.el != EL3 && scr.twi) {
        PseudoInst::quiesceSkip(tc);
        fault = std::make_shared<SecureMonitorTrap>(machInst, 0x1E00000,
                                                    EC_TRAPPED_WFI_WFE);
    } else {
        PseudoInst::quiesce(tc);
    }
    tc->getCpuPtr()->clearInterrupt(tc->threadId(), INT_ABT, 0);
    '''
    wfiIop = InstObjParams("wfi", "WfiInst", "PredOp", \
            { "code" : wfiCode, "predicate_test" : predicateTest },
            ["IsNonSpeculative", "IsQuiesce",
             "IsSerializeAfter", "IsUnverifiable"])
    header_output += BasicDeclare.subst(wfiIop)
    decoder_output += BasicConstructor.subst(wfiIop)
    exec_output += QuiescePredOpExecute.subst(wfiIop)

    sevCode = '''
    SevMailbox = 1;
    System *sys = xc->tcBase()->getSystemPtr();
    for (int x = 0; x < sys->numContexts(); x++) {
        ThreadContext *oc = sys->getThreadContext(x);
        if (oc == xc->tcBase())
            continue;
        // Wake CPU with interrupt if they were sleeping
        if (oc->readMiscReg(MISCREG_SEV_MAILBOX) == 0) {
            // Post Interrupt and wake cpu if needed
            oc->getCpuPtr()->postInterrupt(oc->threadId(), INT_SEV, 0);
        }
    }
    '''
    sevIop = InstObjParams("sev", "SevInst", "PredOp", \
            { "code" : sevCode, "predicate_test" : predicateTest },
            ["IsNonSpeculative", "IsSquashAfter", "IsUnverifiable"])
    header_output += BasicDeclare.subst(sevIop)
    decoder_output += BasicConstructor.subst(sevIop)
    exec_output += PredOpExecute.subst(sevIop)

    sevlCode = '''
    SevMailbox = 1;
    '''
    sevlIop = InstObjParams("sevl", "SevlInst", "PredOp", \
            { "code" : sevlCode, "predicate_test" : predicateTest },
            ["IsNonSpeculative", "IsSquashAfter", "IsUnverifiable"])
    header_output += BasicDeclare.subst(sevlIop)
    decoder_output += BasicConstructor.subst(sevlIop)
    exec_output += BasicExecute.subst(sevlIop)

    itIop = InstObjParams("it", "ItInst", "PredOp", \
            { "code" : ";",
              "predicate_test" : predicateTest }, [])
    header_output += BasicDeclare.subst(itIop)
    decoder_output += BasicConstructor.subst(itIop)
    exec_output += PredOpExecute.subst(itIop)
    unknownCode = '''
        return std::make_shared<UndefinedInstruction>(machInst, true);
    '''
    unknownIop = InstObjParams("unknown", "Unknown", "UnknownOp", \
                               { "code": unknownCode,
                                 "predicate_test": predicateTest })
    header_output += BasicDeclare.subst(unknownIop)
    decoder_output += BasicConstructor.subst(unknownIop)
    exec_output += PredOpExecute.subst(unknownIop)

    ubfxCode = '''
        Dest = bits(Op1, imm2, imm1);
    '''
    ubfxIop = InstObjParams("ubfx", "Ubfx", "RegRegImmImmOp",
                            { "code": ubfxCode,
                              "predicate_test": predicateTest }, [])
    header_output += RegRegImmImmOpDeclare.subst(ubfxIop)
    decoder_output += RegRegImmImmOpConstructor.subst(ubfxIop)
    exec_output += PredOpExecute.subst(ubfxIop)

    sbfxCode = '''
        int32_t resTemp = bits(Op1, imm2, imm1);
        Dest = resTemp | -(resTemp & (1 << (imm2 - imm1)));
    '''
    sbfxIop = InstObjParams("sbfx", "Sbfx", "RegRegImmImmOp",
                            { "code": sbfxCode,
                              "predicate_test": predicateTest }, [])
    header_output += RegRegImmImmOpDeclare.subst(sbfxIop)
    decoder_output += RegRegImmImmOpConstructor.subst(sbfxIop)
    exec_output += PredOpExecute.subst(sbfxIop)

    bfcCode = '''
        Dest = Op1 & ~(mask(imm2 - imm1 + 1) << imm1);
    '''
    bfcIop = InstObjParams("bfc", "Bfc", "RegRegImmImmOp",
                           { "code": bfcCode,
                             "predicate_test": predicateTest }, [])
    header_output += RegRegImmImmOpDeclare.subst(bfcIop)
    decoder_output += RegRegImmImmOpConstructor.subst(bfcIop)
    exec_output += PredOpExecute.subst(bfcIop)

    bfiCode = '''
        uint32_t bitMask = (mask(imm2 - imm1 + 1) << imm1);
        Dest = ((Op1 << imm1) & bitMask) | (Dest & ~bitMask);
    '''
    bfiIop = InstObjParams("bfi", "Bfi", "RegRegImmImmOp",
                           { "code": bfiCode,
                             "predicate_test": predicateTest }, [])
    header_output += RegRegImmImmOpDeclare.subst(bfiIop)
    decoder_output += RegRegImmImmOpConstructor.subst(bfiIop)
    exec_output += PredOpExecute.subst(bfiIop)

    mrc14code = '''
    MiscRegIndex miscReg = (MiscRegIndex) xc->tcBase()->flattenRegId(
                               RegId(MiscRegClass, op1)).index();
    bool can_read, undefined;
    std::tie(can_read, undefined) = canReadCoprocReg(miscReg, Scr, Cpsr);
    if (!can_read || undefined) {
        return std::make_shared<UndefinedInstruction>(machInst, false,
                                                      mnemonic);
    }
    if (mcrMrc14TrapToHyp((const MiscRegIndex) op1, Hcr, Cpsr, Scr, Hdcr,
                          Hstr, Hcptr, imm)) {
        return std::make_shared<HypervisorTrap>(machInst, imm,
                                                EC_TRAPPED_CP14_MCR_MRC);
    }
    Dest = MiscOp1;
    '''

    mrc14Iop = InstObjParams("mrc", "Mrc14", "RegRegImmOp",
                             { "code": mrc14code,
                               "predicate_test": predicateTest }, [])
    header_output += RegRegImmOpDeclare.subst(mrc14Iop)
    decoder_output += RegRegImmOpConstructor.subst(mrc14Iop)
    exec_output += PredOpExecute.subst(mrc14Iop)


    mcr14code = '''
    MiscRegIndex miscReg = (MiscRegIndex) xc->tcBase()->flattenRegId(
                               RegId(MiscRegClass, dest)).index();
    bool can_write, undefined;
    std::tie(can_write, undefined) = canWriteCoprocReg(miscReg, Scr, Cpsr);
    if (undefined || !can_write) {
        return std::make_shared<UndefinedInstruction>(machInst, false,
                                                      mnemonic);
    }
    if (mcrMrc14TrapToHyp(miscReg, Hcr, Cpsr, Scr, Hdcr,
                          Hstr, Hcptr, imm)) {
        return std::make_shared<HypervisorTrap>(machInst, imm,
                                                EC_TRAPPED_CP14_MCR_MRC);
    }
    MiscDest = Op1;
    '''
    mcr14Iop = InstObjParams("mcr", "Mcr14", "RegRegImmOp",
                             { "code": mcr14code,
                               "predicate_test": predicateTest },
                               ["IsSerializeAfter","IsNonSpeculative"])
    header_output += RegRegImmOpDeclare.subst(mcr14Iop)
    decoder_output += RegRegImmOpConstructor.subst(mcr14Iop)
    exec_output += PredOpExecute.subst(mcr14Iop)

    mrc15code = '''
    int preFlatOp1 = flattenMiscRegNsBanked(op1, xc->tcBase());
    MiscRegIndex miscReg = (MiscRegIndex)
                           xc->tcBase()->flattenRegId(RegId(MiscRegClass,
                                                      preFlatOp1)).index();
    bool hypTrap = mcrMrc15TrapToHyp(miscReg, Hcr, Cpsr, Scr, Hdcr, Hstr,
                                     Hcptr, imm);
    bool can_read, undefined;
    std::tie(can_read, undefined) = canReadCoprocReg(miscReg, Scr, Cpsr);
    // if we're in non secure PL1 mode then we can trap regargless of whether
    // the register is accessable, in other modes we trap if only if the register
    // IS accessable.
    if (undefined || (!can_read && !(hypTrap && !inUserMode(Cpsr) &&
                                    !inSecureState(Scr, Cpsr)))) {
        return std::make_shared<UndefinedInstruction>(machInst, false,
                                                      mnemonic);
    }
    if (hypTrap) {
        return std::make_shared<HypervisorTrap>(machInst, imm,
                                                EC_TRAPPED_CP15_MCR_MRC);
    }
    Dest = MiscNsBankedOp1;
    '''

    mrc15Iop = InstObjParams("mrc", "Mrc15", "RegMiscRegImmOp",
                             { "code": mrc15code,
                               "predicate_test": predicateTest }, [])
    header_output += RegMiscRegImmOpDeclare.subst(mrc15Iop)
    decoder_output += RegMiscRegImmOpConstructor.subst(mrc15Iop)
    exec_output += PredOpExecute.subst(mrc15Iop)


    mcr15code = '''
    int preFlatDest = flattenMiscRegNsBanked(dest, xc->tcBase());
    MiscRegIndex miscReg = (MiscRegIndex)
                       xc->tcBase()->flattenRegId(RegId(MiscRegClass,
                                                  preFlatDest)).index();
    bool hypTrap  = mcrMrc15TrapToHyp(miscReg, Hcr, Cpsr, Scr, Hdcr, Hstr,
                                      Hcptr, imm);
    bool can_write, undefined;
    std::tie(can_write, undefined) = canWriteCoprocReg(miscReg, Scr, Cpsr);

    // if we're in non secure PL1 mode then we can trap regargless of whether
    // the register is accessable, in other modes we trap if only if the register
    // IS accessable.
    if (undefined || (!can_write && !(hypTrap && !inUserMode(Cpsr) &&
                                      !inSecureState(Scr, Cpsr)))) {
        return std::make_shared<UndefinedInstruction>(machInst, false,
                                                      mnemonic);
    }
    if (hypTrap) {
        return std::make_shared<HypervisorTrap>(machInst, imm,
                                                EC_TRAPPED_CP15_MCR_MRC);
    }
    MiscNsBankedDest = Op1;
    '''
    mcr15Iop = InstObjParams("mcr", "Mcr15", "MiscRegRegImmOp",
                             { "code": mcr15code,
                               "predicate_test": predicateTest },
                               ["IsSerializeAfter","IsNonSpeculative"])
    header_output += MiscRegRegImmOpDeclare.subst(mcr15Iop)
    decoder_output += MiscRegRegImmOpConstructor.subst(mcr15Iop)
    exec_output += PredOpExecute.subst(mcr15Iop)


    mrrc15code = '''
    int preFlatOp1 = flattenMiscRegNsBanked(op1, xc->tcBase());
    MiscRegIndex miscReg = (MiscRegIndex)
                           xc->tcBase()->flattenRegId(RegId(MiscRegClass,
                                                      preFlatOp1)).index();
    bool hypTrap = mcrrMrrc15TrapToHyp(miscReg, Cpsr, Scr, Hstr, Hcr, imm);
    bool can_read, undefined;
    std::tie(can_read, undefined) = canReadCoprocReg(miscReg, Scr, Cpsr);
    // if we're in non secure PL1 mode then we can trap regargless of whether
    // the register is accessable, in other modes we trap if only if the register
    // IS accessable.
    if (undefined || (!can_read && !(hypTrap && !inUserMode(Cpsr) &&
                                     !inSecureState(Scr, Cpsr)))) {
        return std::make_shared<UndefinedInstruction>(machInst, false,
                                                      mnemonic);
    }
    if (hypTrap) {
        return std::make_shared<HypervisorTrap>(machInst, imm,
                                                EC_TRAPPED_CP15_MCRR_MRRC);
    }
    Dest = bits(MiscNsBankedOp164, 63, 32);
    Dest2 = bits(MiscNsBankedOp164, 31, 0);
    '''
    mrrc15Iop = InstObjParams("mrrc", "Mrrc15", "MrrcOp",
                              { "code": mrrc15code,
                                "predicate_test": predicateTest }, [])
    header_output += MrrcOpDeclare.subst(mrrc15Iop)
    decoder_output += MrrcOpConstructor.subst(mrrc15Iop)
    exec_output += PredOpExecute.subst(mrrc15Iop)


    mcrr15code = '''
    int preFlatDest = flattenMiscRegNsBanked(dest, xc->tcBase());
    MiscRegIndex miscReg = (MiscRegIndex)
                           xc->tcBase()->flattenRegId(RegId(MiscRegClass,
                                                      preFlatDest)).index();
    bool hypTrap  = mcrrMrrc15TrapToHyp(miscReg, Cpsr, Scr, Hstr, Hcr, imm);
    bool can_write, undefined;
    std::tie(can_write, undefined) = canWriteCoprocReg(miscReg, Scr, Cpsr);

    // if we're in non secure PL1 mode then we can trap regargless of whether
    // the register is accessable, in other modes we trap if only if the register
    // IS accessable.
    if (undefined || (!can_write && !(hypTrap && !inUserMode(Cpsr) &&
                                     !inSecureState(Scr, Cpsr)))) {
        return std::make_shared<UndefinedInstruction>(machInst, false,
                                                      mnemonic);
    }
    if (hypTrap) {
        return std::make_shared<HypervisorTrap>(machInst, imm,
                                                EC_TRAPPED_CP15_MCRR_MRRC);
    }
    MiscNsBankedDest64 = ((uint64_t) Op1 << 32) | Op2;
    '''
    mcrr15Iop = InstObjParams("mcrr", "Mcrr15", "McrrOp",
                              { "code": mcrr15code,
                                "predicate_test": predicateTest }, [])
    header_output += McrrOpDeclare.subst(mcrr15Iop)
    decoder_output += McrrOpConstructor.subst(mcrr15Iop)
    exec_output += PredOpExecute.subst(mcrr15Iop)


    enterxCode = '''
        NextThumb = true;
        NextJazelle = true;
    '''
    enterxIop = InstObjParams("enterx", "Enterx", "PredOp",
                              { "code": enterxCode,
                                "predicate_test": predicateTest }, [])
    header_output += BasicDeclare.subst(enterxIop)
    decoder_output += BasicConstructor.subst(enterxIop)
    exec_output += PredOpExecute.subst(enterxIop)

    leavexCode = '''
        NextThumb = true;
        NextJazelle = false;
    '''
    leavexIop = InstObjParams("leavex", "Leavex", "PredOp",
                              { "code": leavexCode,
                                "predicate_test": predicateTest }, [])
    header_output += BasicDeclare.subst(leavexIop)
    decoder_output += BasicConstructor.subst(leavexIop)
    exec_output += PredOpExecute.subst(leavexIop)

    setendCode = '''
        CPSR cpsr = Cpsr;
        cpsr.e = imm;
        Cpsr = cpsr;
    '''
    setendIop = InstObjParams("setend", "Setend", "ImmOp",
                              { "code": setendCode,
                                "predicate_test": predicateTest },
                              ["IsSerializeAfter","IsNonSpeculative"])
    header_output += ImmOpDeclare.subst(setendIop)
    decoder_output += ImmOpConstructor.subst(setendIop)
    exec_output += PredOpExecute.subst(setendIop)

    clrexCode = '''
        LLSCLock = 0;
    '''
    clrexIop = InstObjParams("clrex", "Clrex","PredOp",
                             { "code": clrexCode,
                               "predicate_test": predicateTest },[])
    header_output += BasicDeclare.subst(clrexIop)
    decoder_output += BasicConstructor.subst(clrexIop)
    exec_output += PredOpExecute.subst(clrexIop)

    isbCode = '''
        // If the barrier is due to a CP15 access check for hyp traps
        if ((imm != 0) && mcrMrc15TrapToHyp(MISCREG_CP15ISB, Hcr, Cpsr, Scr,
            Hdcr, Hstr, Hcptr, imm)) {
            return std::make_shared<HypervisorTrap>(machInst, imm,
                EC_TRAPPED_CP15_MCR_MRC);
        }
        fault = std::make_shared<FlushPipe>();
    '''
    isbIop = InstObjParams("isb", "Isb", "ImmOp",
                             {"code": isbCode,
                               "predicate_test": predicateTest},
                                ['IsSerializeAfter'])
    header_output += ImmOpDeclare.subst(isbIop)
    decoder_output += ImmOpConstructor.subst(isbIop)
    exec_output += PredOpExecute.subst(isbIop)

    dsbCode = '''
        // If the barrier is due to a CP15 access check for hyp traps
        if ((imm != 0) && mcrMrc15TrapToHyp(MISCREG_CP15DSB, Hcr, Cpsr, Scr,
            Hdcr, Hstr, Hcptr, imm)) {
            return std::make_shared<HypervisorTrap>(machInst, imm,
                EC_TRAPPED_CP15_MCR_MRC);
        }
        fault = std::make_shared<FlushPipe>();
    '''
    dsbIop = InstObjParams("dsb", "Dsb", "ImmOp",
                             {"code": dsbCode,
                               "predicate_test": predicateTest},
                              ['IsMemBarrier', 'IsSerializeAfter'])
    header_output += ImmOpDeclare.subst(dsbIop)
    decoder_output += ImmOpConstructor.subst(dsbIop)
    exec_output += PredOpExecute.subst(dsbIop)

    dmbCode = '''
        // If the barrier is due to a CP15 access check for hyp traps
        if ((imm != 0) && mcrMrc15TrapToHyp(MISCREG_CP15DMB, Hcr, Cpsr, Scr,
            Hdcr, Hstr, Hcptr, imm)) {
            return std::make_shared<HypervisorTrap>(machInst, imm,
                EC_TRAPPED_CP15_MCR_MRC);
        }
    '''
    dmbIop = InstObjParams("dmb", "Dmb", "ImmOp",
                             {"code": dmbCode,
                               "predicate_test": predicateTest},
                               ['IsMemBarrier'])
    header_output += ImmOpDeclare.subst(dmbIop)
    decoder_output += ImmOpConstructor.subst(dmbIop)
    exec_output += PredOpExecute.subst(dmbIop)

    dbgCode = '''
    '''
    dbgIop = InstObjParams("dbg", "Dbg", "PredOp",
                             {"code": dbgCode,
                               "predicate_test": predicateTest})
    header_output += BasicDeclare.subst(dbgIop)
    decoder_output += BasicConstructor.subst(dbgIop)
    exec_output += PredOpExecute.subst(dbgIop)

    cpsCode = '''
    uint32_t mode = bits(imm, 4, 0);
    uint32_t f = bits(imm, 5);
    uint32_t i = bits(imm, 6);
    uint32_t a = bits(imm, 7);
    bool setMode = bits(imm, 8);
    bool enable = bits(imm, 9);
    CPSR cpsr = Cpsr;
    SCTLR sctlr = Sctlr;
    if (cpsr.mode != MODE_USER) {
        if (enable) {
            if (f) cpsr.f = 0;
            if (i) cpsr.i = 0;
            if (a) cpsr.a = 0;
        } else {
            if (f && !sctlr.nmfi) cpsr.f = 1;
            if (i) cpsr.i = 1;
            if (a) cpsr.a = 1;
        }
        if (setMode) {
            cpsr.mode = mode;
        }
    }
    Cpsr = cpsr;
    '''
    cpsIop = InstObjParams("cps", "Cps", "ImmOp",
                           { "code": cpsCode,
                             "predicate_test": predicateTest },
                           ["IsSerializeAfter","IsNonSpeculative"])
    header_output += ImmOpDeclare.subst(cpsIop)
    decoder_output += ImmOpConstructor.subst(cpsIop)
    exec_output += PredOpExecute.subst(cpsIop)
}};