xref: /gem5/src/arch/sparc/isa/decoder.isa

// Copyright (c) 2006-2007 The Regents of The University of Michigan
// 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: Ali Saidi
//          Gabe Black
//          Steve Reinhardt

////////////////////////////////////////////////////////////////////
//
// The actual decoder specification
//

decode OP default Unknown::unknown()
{
    0x0: decode OP2
    {
        // Throw an illegal instruction acception
        0x0: Trap::illtrap({{fault = new IllegalInstruction;}});
        format BranchN
        {
            // bpcc
            0x1: decode COND2
            {
                // Branch Always
                0x8: bpa(19, annul_code={{
                                 SparcISA::PCState pc = PCS;
                                 pc.npc(pc.pc() + disp);
                                 pc.nnpc(pc.npc() + 4);
                                 PCS = pc;
                             }});
                // Branch Never
                0x0: bpn(19, {{;}},
                             annul_code={{
                                 SparcISA::PCState pc = PCS;
                                 pc.nnpc(pc.npc() + 8);
                                 pc.npc(pc.npc() + 4);
                                 PCS = pc;
                             }});
                default: decode BPCC
                {
                    0x0: bpcci(19, test={{passesCondition(Ccr<3:0>, COND2)}});
                    0x2: bpccx(19, test={{passesCondition(Ccr<7:4>, COND2)}});
                }
            }
            // bicc
            0x2: decode COND2
            {
                // Branch Always
                0x8: ba(22, annul_code={{
                                SparcISA::PCState pc = PCS;
                                pc.npc(pc.pc() + disp);
                                pc.nnpc(pc.npc() + 4);
                                PCS = pc;
                            }});
                // Branch Never
                0x0: bn(22, {{;}},
                            annul_code={{
                                SparcISA::PCState pc = PCS;
                                pc.nnpc(pc.npc() + 8);
                                pc.npc(pc.npc() + 4);
                                PCS = pc;
                            }});
                default: bicc(22, test={{passesCondition(Ccr<3:0>, COND2)}});
            }
        }
        0x3: decode RCOND2
        {
            format BranchSplit
            {
                0x1: bpreq(test={{Rs1.sdw == 0}});
                0x2: bprle(test={{Rs1.sdw <= 0}});
                0x3: bprl(test={{Rs1.sdw < 0}});
                0x5: bprne(test={{Rs1.sdw != 0}});
                0x6: bprg(test={{Rs1.sdw > 0}});
                0x7: bprge(test={{Rs1.sdw >= 0}});
            }
        }
        // SETHI (or NOP if rd == 0 and imm == 0)
        0x4: SetHi::sethi({{Rd.udw = imm;}});
        // fbpfcc
        0x5: decode COND2 {
            format BranchN {
                // Branch Always
                0x8: fbpa(22, annul_code={{
                                  SparcISA::PCState pc = PCS;
                                  pc.npc(pc.pc() + disp);
                                  pc.nnpc(pc.npc() + 4);
                                  PCS = pc;
                              }});
                // Branch Never
                0x0: fbpn(22, {{;}},
                             annul_code={{
                                 SparcISA::PCState pc = PCS;
                                 pc.nnpc(pc.npc() + 8);
                                 pc.npc(pc.npc() + 4);
                                 PCS = pc;
                             }});
                default: decode BPCC {
                    0x0: fbpfcc0(19, test=
                                 {{passesFpCondition(Fsr<11:10>, COND2)}});
                    0x1: fbpfcc1(19, test=
                                 {{passesFpCondition(Fsr<33:32>, COND2)}});
                    0x2: fbpfcc2(19, test=
                                 {{passesFpCondition(Fsr<35:34>, COND2)}});
                    0x3: fbpfcc3(19, test=
                                 {{passesFpCondition(Fsr<37:36>, COND2)}});
                }
            }
        }
        // fbfcc
        0x6: decode COND2 {
            format BranchN {
                // Branch Always
                0x8: fba(22, annul_code={{
                                 SparcISA::PCState pc = PCS;
                                 pc.npc(pc.pc() + disp);
                                 pc.nnpc(pc.npc() + 4);
                                 PCS = pc;
                             }});
                // Branch Never
                0x0: fbn(22, {{;}},
                             annul_code={{
                                 SparcISA::PCState pc = PCS;
                                 pc.nnpc(pc.npc() + 8);
                                 pc.npc(pc.npc() + 4);
                                 PCS = pc;
                             }});
                default: fbfcc(22, test=
                               {{passesFpCondition(Fsr<11:10>, COND2)}});
            }
        }
    }
    0x1: BranchN::call(30, {{
            SparcISA::PCState pc = PCS;
            if (Pstate<3:>)
                R15 = (pc.pc())<31:0>;
            else
                R15 = pc.pc();
            pc.nnpc(R15 + disp);
            PCS = pc;
    }});
    0x2: decode OP3 {
        format IntOp {
            0x00: add({{Rd = Rs1.sdw + Rs2_or_imm13;}});
            0x01: and({{Rd = Rs1.sdw & Rs2_or_imm13;}});
            0x02: or({{Rd = Rs1.sdw | Rs2_or_imm13;}});
            0x03: xor({{Rd = Rs1.sdw ^ Rs2_or_imm13;}});
            0x04: sub({{Rd = Rs1.sdw - Rs2_or_imm13;}});
            0x05: andn({{Rd = Rs1.sdw & ~Rs2_or_imm13;}});
            0x06: orn({{Rd = Rs1.sdw | ~Rs2_or_imm13;}});
            0x07: xnor({{Rd = ~(Rs1.sdw ^ Rs2_or_imm13);}});
            0x08: addc({{Rd = Rs1.sdw + Rs2_or_imm13 + Ccr<0:0>;}});
            0x09: mulx({{Rd = Rs1.sdw * Rs2_or_imm13;}});
            0x0A: umul({{
                Rd = Rs1.udw<31:0> * Rs2_or_imm13<31:0>;
                Y = Rd<63:32>;
            }});
            0x0B: smul({{
                Rd.sdw = sext<32>(Rs1.sdw<31:0>) * sext<32>(Rs2_or_imm13<31:0>);
                Y = Rd.sdw<63:32>;
            }});
            0x0C: subc({{Rd.sdw = Rs1.sdw + (~Rs2_or_imm13) + 1 - Ccr<0:0>}});
            0x0D: udivx({{
                if (Rs2_or_imm13 == 0)
                    fault = new DivisionByZero;
                else
                    Rd.udw = Rs1.udw / Rs2_or_imm13;
            }});
            0x0E: udiv({{
                if (Rs2_or_imm13 == 0) {
                    fault = new DivisionByZero;
                } else {
                    Rd.udw = ((Y << 32) | Rs1.udw<31:0>) / Rs2_or_imm13;
                    if (Rd.udw >> 32 != 0)
                        Rd.udw = 0xFFFFFFFF;
                }
            }});
            0x0F: sdiv({{
                if (Rs2_or_imm13.sdw == 0) {
                    fault = new DivisionByZero;
                } else {
                    Rd.udw = ((int64_t)((Y << 32) |
                            Rs1.sdw<31:0>)) / Rs2_or_imm13.sdw;
                    if ((int64_t)Rd.udw >=
                        std::numeric_limits<int32_t>::max()) {
                        Rd.udw = 0x7FFFFFFF;
                    } else if ((int64_t)Rd.udw <=
                        std::numeric_limits<int32_t>::min()) {
                        Rd.udw = ULL(0xFFFFFFFF80000000);
                    }
                }
            }});
        }
        format IntOpCc {
            0x10: addcc({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = op1 + op2;
                }});
            0x11: IntOpCcRes::andcc({{Rd = Rs1 & Rs2_or_imm13;}});
            0x12: IntOpCcRes::orcc({{Rd = Rs1 | Rs2_or_imm13;}});
            0x13: IntOpCcRes::xorcc({{Rd = Rs1 ^ Rs2_or_imm13;}});
            0x14: subcc({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = op1 - op2;
                }}, sub=True);
            0x15: IntOpCcRes::andncc({{Rd = Rs1 & ~Rs2_or_imm13;}});
            0x16: IntOpCcRes::orncc({{Rd = Rs1 | ~Rs2_or_imm13;}});
            0x17: IntOpCcRes::xnorcc({{Rd = ~(Rs1 ^ Rs2_or_imm13);}});
            0x18: addccc({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = op1 + op2 + Ccr<0:>;
                }});
            0x1A: IntOpCcRes::umulcc({{
                uint64_t resTemp;
                Rd = resTemp = Rs1.udw<31:0> * Rs2_or_imm13.udw<31:0>;
                Y = resTemp<63:32>;}});
            0x1B: IntOpCcRes::smulcc({{
                int64_t resTemp;
                Rd = resTemp = sext<32>(Rs1.sdw<31:0>) * sext<32>(Rs2_or_imm13<31:0>);
                Y = resTemp<63:32>;}});
            0x1C: subccc({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = op1 - op2 - Ccr<0:>;
                }}, sub=True);
            0x1D: IntOpCcRes::udivxcc({{
                if (Rs2_or_imm13.udw == 0)
                    fault = new DivisionByZero;
                else
                    Rd = Rs1.udw / Rs2_or_imm13.udw;}});
            0x1E: IntOpCcRes::udivcc({{
                    uint64_t resTemp;
                    uint32_t val2 = Rs2_or_imm13.udw;
                    int32_t overflow = 0;
                    if (val2 == 0) {
                        fault = new DivisionByZero;
                    } else {
                        resTemp = (uint64_t)((Y << 32) | Rs1.udw<31:0>) / val2;
                        overflow = (resTemp<63:32> != 0);
                        if (overflow)
                            Rd = resTemp = 0xFFFFFFFF;
                        else
                            Rd = resTemp;
                    }
                }}, iv={{overflow}});
            0x1F: IntOpCcRes::sdivcc({{
                    int64_t val2 = Rs2_or_imm13.sdw<31:0>;
                    bool overflow = false, underflow = false;
                    if (val2 == 0) {
                        fault = new DivisionByZero;
                    } else {
                        Rd = (int64_t)((Y << 32) | Rs1.sdw<31:0>) / val2;
                        overflow = ((int64_t)Rd >= std::numeric_limits<int32_t>::max());
                        underflow = ((int64_t)Rd <= std::numeric_limits<int32_t>::min());
                        if (overflow)
                            Rd = 0x7FFFFFFF;
                        else if (underflow)
                            Rd = ULL(0xFFFFFFFF80000000);
                    }
                }}, iv={{overflow || underflow}});
            0x20: taddcc({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = Rs1 + op2;
                }}, iv={{
                    (op1 & mask(2)) || (op2 & mask(2)) ||
                    findOverflow(32, res, op1, op2)
                }});
            0x21: tsubcc({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = Rs1 - op2;
                }}, iv={{
                    (op1 & mask(2)) || (op2 & mask(2)) ||
                    findOverflow(32, res, op1, ~op2)
                }}, sub=True);
            0x22: taddcctv({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = op1 + op2;
                    bool overflow = (op1 & mask(2)) || (op2 & mask(2)) ||
                        findOverflow(32, res, op1, op2);
                    if (overflow)
                        fault = new TagOverflow;
                }}, iv={{overflow}});
            0x23: tsubcctv({{
                    int64_t res, op1 = Rs1, op2 = Rs2_or_imm13;
                    Rd = res = op1 - op2;
                    bool overflow = (op1 & mask(2)) || (op2 & mask(2)) ||
                        findOverflow(32, res, op1, ~op2);
                    if (overflow)
                        fault = new TagOverflow;
                }}, iv={{overflow}}, sub=True);
            0x24: mulscc({{
                    int32_t savedLSB = Rs1<0:>;

                    // Step 1
                    int64_t multiplicand = Rs2_or_imm13;
                    // Step 2
                    int32_t partialP = Rs1<31:1> |
                        ((Ccr<3:3> ^ Ccr<1:1>) << 31);
                    // Step 3
                    int32_t added = Y<0:> ? multiplicand : 0;
                    int64_t res, op1 = partialP, op2 = added;
                    Rd = res = partialP + added;
                    // Steps 4 & 5
                    Y = Y<31:1> | (savedLSB << 31);
                }});
        }
        format IntOp
        {
            0x25: decode X {
                0x0: sll({{Rd = Rs1 << (I ? SHCNT32 : Rs2<4:0>);}});
                0x1: sllx({{Rd = Rs1 << (I ? SHCNT64 : Rs2<5:0>);}});
            }
            0x26: decode X {
                0x0: srl({{Rd = Rs1.uw >> (I ? SHCNT32 : Rs2<4:0>);}});
                0x1: srlx({{Rd = Rs1.udw >> (I ? SHCNT64 : Rs2<5:0>);}});
            }
            0x27: decode X {
                0x0: sra({{Rd = Rs1.sw >> (I ? SHCNT32 : Rs2<4:0>);}});
                0x1: srax({{Rd = Rs1.sdw >> (I ? SHCNT64 : Rs2<5:0>);}});
            }
            0x28: decode RS1 {
                0x00: NoPriv::rdy({{Rd = Y<31:0>;}});
                // 1 should cause an illegal instruction exception
                0x02: NoPriv::rdccr({{Rd = Ccr;}});
                0x03: NoPriv::rdasi({{Rd = Asi;}});
                0x04: Priv::rdtick({{Rd = Tick;}}, {{Tick<63:>}});
                0x05: NoPriv::rdpc({{
                    SparcISA::PCState pc = PCS;
                    if (Pstate<3:>)
                        Rd = (pc.pc())<31:0>;
                    else
                        Rd = pc.pc();
                }});
                0x06: NoPriv::rdfprs({{
                    // Wait for all fpops to finish.
                    Rd = Fprs;
                }});
                // 7-14 should cause an illegal instruction exception
                0x0F: decode I {
                    0x0: Nop::stbar({{/*stuff*/}}, IsWriteBarrier, MemWriteOp);
                    0x1: Nop::membar({{/*stuff*/}}, IsMemBarrier, MemReadOp);
                }
                0x10: Priv::rdpcr({{Rd = Pcr;}});
                0x11: Priv::rdpic({{Rd = Pic;}}, {{Pcr<0:>}});
                // 0x12 should cause an illegal instruction exception
                0x13: NoPriv::rdgsr({{
                       fault = checkFpEnableFault(xc);
                       if (fault)
                            return fault;
                       Rd = Gsr;
                }});
                // 0x14-0x15 should cause an illegal instruction exception
                0x16: Priv::rdsoftint({{Rd = Softint;}});
                0x17: Priv::rdtick_cmpr({{Rd = TickCmpr;}});
                0x18: Priv::rdstick({{Rd = Stick}}, {{Stick<63:>}});
                0x19: Priv::rdstick_cmpr({{Rd = StickCmpr;}});
                0x1A: Priv::rdstrand_sts_reg({{
                    if (Pstate<2:> && !Hpstate<2:>)
                        Rd = StrandStsReg<0:>;
                    else
                        Rd = StrandStsReg;
                }});
                // 0x1A is supposed to be reserved, but it reads the strand
                // status register.
                // 0x1B-0x1F should cause an illegal instruction exception
            }
            0x29: decode RS1 {
                0x00: HPriv::rdhprhpstate({{Rd = Hpstate;}});
                0x01: HPriv::rdhprhtstate({{Rd = Htstate;}}, checkTl=true);
                // 0x02 should cause an illegal instruction exception
                0x03: HPriv::rdhprhintp({{Rd = Hintp;}});
                // 0x04 should cause an illegal instruction exception
                0x05: HPriv::rdhprhtba({{Rd = Htba;}});
                0x06: HPriv::rdhprhver({{Rd = Hver;}});
                // 0x07-0x1E should cause an illegal instruction exception
                0x1F: HPriv::rdhprhstick_cmpr({{Rd = HstickCmpr;}});
            }
            0x2A: decode RS1 {
                0x00: Priv::rdprtpc({{Rd = Tpc;}}, checkTl=true);
                0x01: Priv::rdprtnpc({{Rd = Tnpc;}}, checkTl=true);
                0x02: Priv::rdprtstate({{Rd = Tstate;}}, checkTl=true);
                0x03: Priv::rdprtt({{Rd = Tt;}}, checkTl=true);
                0x04: Priv::rdprtick({{Rd = Tick;}});
                0x05: Priv::rdprtba({{Rd = Tba;}});
                0x06: Priv::rdprpstate({{Rd = Pstate;}});
                0x07: Priv::rdprtl({{Rd = Tl;}});
                0x08: Priv::rdprpil({{Rd = Pil;}});
                0x09: Priv::rdprcwp({{Rd = Cwp;}});
                0x0A: Priv::rdprcansave({{Rd = Cansave;}});
                0x0B: Priv::rdprcanrestore({{Rd = Canrestore;}});
                0x0C: Priv::rdprcleanwin({{Rd = Cleanwin;}});
                0x0D: Priv::rdprotherwin({{Rd = Otherwin;}});
                0x0E: Priv::rdprwstate({{Rd = Wstate;}});
                // 0x0F should cause an illegal instruction exception
                0x10: Priv::rdprgl({{Rd = Gl;}});
                // 0x11-0x1F should cause an illegal instruction exception
            }
            0x2B: BasicOperate::flushw({{
                if (NWindows - 2 - Cansave != 0) {
                    if (Otherwin)
                        fault = new SpillNOther(4*Wstate<5:3>);
                    else
                        fault = new SpillNNormal(4*Wstate<2:0>);
                }
            }});
            0x2C: decode MOVCC3
            {
                0x0: decode CC
                {
                    0x0: movccfcc0({{
                        if (passesCondition(Fsr<11:10>, COND4))
                            Rd = Rs2_or_imm11;
                        else
                            Rd = Rd;
                    }});
                    0x1: movccfcc1({{
                        if (passesCondition(Fsr<33:32>, COND4))
                            Rd = Rs2_or_imm11;
                        else
                            Rd = Rd;
                    }});
                    0x2: movccfcc2({{
                        if (passesCondition(Fsr<35:34>, COND4))
                            Rd = Rs2_or_imm11;
                        else
                            Rd = Rd;
                    }});
                    0x3: movccfcc3({{
                        if (passesCondition(Fsr<37:36>, COND4))
                            Rd = Rs2_or_imm11;
                        else
                            Rd = Rd;
                    }});
                }
                0x1: decode CC
                {
                    0x0: movcci({{
                        if (passesCondition(Ccr<3:0>, COND4))
                            Rd = Rs2_or_imm11;
                        else
                            Rd = Rd;
                    }});
                    0x2: movccx({{
                        if (passesCondition(Ccr<7:4>, COND4))
                            Rd = Rs2_or_imm11;
                        else
                            Rd = Rd;
                    }});
                }
            }
            0x2D: sdivx({{
                if (Rs2_or_imm13.sdw == 0)
                    fault = new DivisionByZero;
                else
                    Rd.sdw = Rs1.sdw / Rs2_or_imm13.sdw;
            }});
            0x2E: Trap::popc({{fault = new IllegalInstruction;}});
            0x2F: decode RCOND3
            {
                0x1: movreq({{Rd = (Rs1.sdw == 0) ? Rs2_or_imm10 : Rd;}});
                0x2: movrle({{Rd = (Rs1.sdw <= 0) ? Rs2_or_imm10 : Rd;}});
                0x3: movrl({{Rd = (Rs1.sdw < 0) ? Rs2_or_imm10 : Rd;}});
                0x5: movrne({{Rd = (Rs1.sdw != 0) ? Rs2_or_imm10 : Rd;}});
                0x6: movrg({{Rd = (Rs1.sdw > 0) ? Rs2_or_imm10 : Rd;}});
                0x7: movrge({{Rd = (Rs1.sdw >= 0) ? Rs2_or_imm10 : Rd;}});
            }
            0x30: decode RD {
                0x00: NoPriv::wry({{Y = (Rs1 ^ Rs2_or_imm13)<31:0>;}});
                // 0x01 should cause an illegal instruction exception
                0x02: NoPriv::wrccr({{Ccr = Rs1 ^ Rs2_or_imm13;}});
                0x03: NoPriv::wrasi({{Asi = Rs1 ^ Rs2_or_imm13;}});
                // 0x04-0x05 should cause an illegal instruction exception
                0x06: NoPriv::wrfprs({{Fprs = Rs1 ^ Rs2_or_imm13;}});
                // 0x07-0x0E should cause an illegal instruction exception
                0x0F: Trap::softreset({{fault = new SoftwareInitiatedReset;}});
                0x10: Priv::wrpcr({{Pcr = Rs1 ^ Rs2_or_imm13;}});
                0x11: Priv::wrpic({{Pic = Rs1 ^ Rs2_or_imm13;}}, {{Pcr<0:>}});
                // 0x12 should cause an illegal instruction exception
                0x13: NoPriv::wrgsr({{
                    if (Fprs<2:> == 0 || Pstate<4:> == 0)
                        return new FpDisabled;
                    Gsr = Rs1 ^ Rs2_or_imm13;
                }});
                0x14: Priv::wrsoftint_set({{SoftintSet = Rs1 ^ Rs2_or_imm13;}});
                0x15: Priv::wrsoftint_clr({{SoftintClr = Rs1 ^ Rs2_or_imm13;}});
                0x16: Priv::wrsoftint({{Softint = Rs1 ^ Rs2_or_imm13;}});
                0x17: Priv::wrtick_cmpr({{TickCmpr = Rs1 ^ Rs2_or_imm13;}});
                0x18: NoPriv::wrstick({{
                    if (!Hpstate<2:>)
                        return new IllegalInstruction;
                    Stick = Rs1 ^ Rs2_or_imm13;
                }});
                0x19: Priv::wrstick_cmpr({{StickCmpr = Rs1 ^ Rs2_or_imm13;}});
                0x1A: Priv::wrstrand_sts_reg({{
                        StrandStsReg = Rs1 ^ Rs2_or_imm13;
                }});
                // 0x1A is supposed to be reserved, but it writes the strand
                // status register.
                // 0x1B-0x1F should cause an illegal instruction exception
            }
            0x31: decode FCN {
                0x0: Priv::saved({{
                    assert(Cansave < NWindows - 2);
                    assert(Otherwin || Canrestore);
                    Cansave = Cansave + 1;
                    if (Otherwin == 0)
                        Canrestore = Canrestore - 1;
                    else
                        Otherwin = Otherwin - 1;
                }});
                0x1: Priv::restored({{
                    assert(Cansave || Otherwin);
                    assert(Canrestore < NWindows - 2);
                    Canrestore = Canrestore + 1;
                    if (Otherwin == 0)
                        Cansave = Cansave - 1;
                    else
                        Otherwin = Otherwin - 1;

                    if (Cleanwin < NWindows - 1)
                        Cleanwin = Cleanwin + 1;
                }});
            }
            0x32: decode RD {
                0x00: Priv::wrprtpc(
                              {{Tpc = Rs1 ^ Rs2_or_imm13;}}, checkTl=true);
                0x01: Priv::wrprtnpc(
                              {{Tnpc = Rs1 ^ Rs2_or_imm13;}}, checkTl=true);
                0x02: Priv::wrprtstate(
                              {{Tstate = Rs1 ^ Rs2_or_imm13;}}, checkTl=true);
                0x03: Priv::wrprtt(
                              {{Tt = Rs1 ^ Rs2_or_imm13;}}, checkTl=true);
                0x04: HPriv::wrprtick({{Tick = Rs1 ^ Rs2_or_imm13;}});
                0x05: Priv::wrprtba({{Tba = Rs1 ^ Rs2_or_imm13;}});
                0x06: Priv::wrprpstate({{Pstate = Rs1 ^ Rs2_or_imm13;}});
                0x07: Priv::wrprtl({{
                    if (Pstate<2:> && !Hpstate<2:>)
                        Tl = std::min<uint64_t>(Rs1 ^ Rs2_or_imm13, MaxPTL);
                    else
                        Tl = std::min<uint64_t>(Rs1 ^ Rs2_or_imm13, MaxTL);
                }});
                0x08: Priv::wrprpil({{Pil = Rs1 ^ Rs2_or_imm13;}});
                0x09: Priv::wrprcwp({{Cwp = Rs1 ^ Rs2_or_imm13;}});
                0x0A: Priv::wrprcansave({{Cansave = Rs1 ^ Rs2_or_imm13;}});
                0x0B: Priv::wrprcanrestore({{Canrestore = Rs1 ^ Rs2_or_imm13;}});
                0x0C: Priv::wrprcleanwin({{Cleanwin = Rs1 ^ Rs2_or_imm13;}});
                0x0D: Priv::wrprotherwin({{Otherwin = Rs1 ^ Rs2_or_imm13;}});
                0x0E: Priv::wrprwstate({{Wstate = Rs1 ^ Rs2_or_imm13;}});
                // 0x0F should cause an illegal instruction exception
                0x10: Priv::wrprgl({{
                    if (Pstate<2:> && !Hpstate<2:>)
                        Gl = std::min<uint64_t>(Rs1 ^ Rs2_or_imm13, MaxPGL);
                    else
                        Gl = std::min<uint64_t>(Rs1 ^ Rs2_or_imm13, MaxGL);
                }});
                // 0x11-0x1F should cause an illegal instruction exception
            }
            0x33: decode RD {
                0x00: HPriv::wrhprhpstate({{Hpstate = Rs1 ^ Rs2_or_imm13;}});
                0x01: HPriv::wrhprhtstate(
                              {{Htstate = Rs1 ^ Rs2_or_imm13;}}, checkTl=true);
                // 0x02 should cause an illegal instruction exception
                0x03: HPriv::wrhprhintp({{Hintp = Rs1 ^ Rs2_or_imm13;}});
                // 0x04 should cause an illegal instruction exception
                0x05: HPriv::wrhprhtba({{Htba = Rs1 ^ Rs2_or_imm13;}});
                // 0x06-0x01D should cause an illegal instruction exception
                0x1F: HPriv::wrhprhstick_cmpr({{HstickCmpr = Rs1 ^ Rs2_or_imm13;}});
            }
            0x34: decode OPF{
                format FpBasic{
                    0x01: fmovs({{Frds.uw = Frs2s.uw;}});
                    0x02: fmovd({{Frd.udw = Frs2.udw;}});
                    0x03: FpUnimpl::fmovq();
                    0x05: fnegs({{Frds.uw = Frs2s.uw ^ (1UL << 31);}});
                    0x06: fnegd({{Frd.udw = Frs2.udw ^ (1ULL << 63);}});
                    0x07: FpUnimpl::fnegq();
                    0x09: fabss({{Frds.uw = ((1UL << 31) - 1) & Frs2s.uw;}});
                    0x0A: fabsd({{Frd.udw = ((1ULL << 63) - 1) & Frs2.udw;}});
                    0x0B: FpUnimpl::fabsq();
                    0x29: fsqrts({{Frds.sf = std::sqrt(Frs2s.sf);}});
                    0x2A: fsqrtd({{Frd.df = std::sqrt(Frs2.df);}});
                    0x2B: FpUnimpl::fsqrtq();
                    0x41: fadds({{Frds.sf = Frs1s.sf + Frs2s.sf;}});
                    0x42: faddd({{Frd.df = Frs1.df + Frs2.df;}});
                    0x43: FpUnimpl::faddq();
                    0x45: fsubs({{Frds.sf = Frs1s.sf - Frs2s.sf;}});
                    0x46: fsubd({{Frd.df = Frs1.df - Frs2.df; }});
                    0x47: FpUnimpl::fsubq();
                    0x49: fmuls({{Frds.sf = Frs1s.sf * Frs2s.sf;}});
                    0x4A: fmuld({{Frd.df = Frs1.df * Frs2.df;}});
                    0x4B: FpUnimpl::fmulq();
                    0x4D: fdivs({{Frds.sf = Frs1s.sf / Frs2s.sf;}});
                    0x4E: fdivd({{Frd.df = Frs1.df / Frs2.df;}});
                    0x4F: FpUnimpl::fdivq();
                    0x69: fsmuld({{Frd.df = Frs1s.sf * Frs2s.sf;}});
                    0x6E: FpUnimpl::fdmulq();
                    0x81: fstox({{Frd.sdw = static_cast<int64_t>(Frs2s.sf);}});
                    0x82: fdtox({{Frd.sdw = static_cast<int64_t>(Frs2.df);}});
                    0x83: FpUnimpl::fqtox();
                    0x84: fxtos({{Frds.sf = static_cast<float>(Frs2.sdw);}});
                    0x88: fxtod({{Frd.df = static_cast<double>(Frs2.sdw);}});
                    0x8C: FpUnimpl::fxtoq();
                    0xC4: fitos({{Frds.sf = static_cast<float>(Frs2s.sw);}});
                    0xC6: fdtos({{Frds.sf = Frs2.df;}});
                    0xC7: FpUnimpl::fqtos();
                    0xC8: fitod({{Frd.df = static_cast<double>(Frs2s.sw);}});
                    0xC9: fstod({{Frd.df = Frs2s.sf;}});
                    0xCB: FpUnimpl::fqtod();
                    0xCC: FpUnimpl::fitoq();
                    0xCD: FpUnimpl::fstoq();
                    0xCE: FpUnimpl::fdtoq();
                    0xD1: fstoi({{
                            Frds.sw = static_cast<int32_t>(Frs2s.sf);
                            float t = Frds.sw;
                            if (t != Frs2s.sf)
                               Fsr = insertBits(Fsr, 4,0, 0x01);
                    }});
                    0xD2: fdtoi({{
                            Frds.sw = static_cast<int32_t>(Frs2.df);
                            double t = Frds.sw;
                            if (t != Frs2.df)
                               Fsr = insertBits(Fsr, 4,0, 0x01);
                    }});
                    0xD3: FpUnimpl::fqtoi();
                    default: FailUnimpl::fpop1();
                }
            }
            0x35: decode OPF{
                format FpBasic{
                    0x01: fmovs_fcc0({{
                        if (passesFpCondition(Fsr<11:10>, COND4))
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x02: fmovd_fcc0({{
                        if (passesFpCondition(Fsr<11:10>, COND4))
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x03: FpUnimpl::fmovq_fcc0();
                    0x25: fmovrsz({{
                        if (Rs1 == 0)
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x26: fmovrdz({{
                        if (Rs1 == 0)
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x27: FpUnimpl::fmovrqz();
                    0x41: fmovs_fcc1({{
                        if (passesFpCondition(Fsr<33:32>, COND4))
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x42: fmovd_fcc1({{
                        if (passesFpCondition(Fsr<33:32>, COND4))
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x43: FpUnimpl::fmovq_fcc1();
                    0x45: fmovrslez({{
                        if (Rs1 <= 0)
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x46: fmovrdlez({{
                        if (Rs1 <= 0)
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x47: FpUnimpl::fmovrqlez();
                    0x51: fcmps({{
                          uint8_t fcc;
                          if (isnan(Frs1s) || isnan(Frs2s))
                              fcc = 3;
                          else if (Frs1s < Frs2s)
                              fcc = 1;
                          else if (Frs1s > Frs2s)
                              fcc = 2;
                          else
                              fcc = 0;
                          uint8_t firstbit = 10;
                          if (FCMPCC)
                              firstbit = FCMPCC * 2 + 30;
                          Fsr = insertBits(Fsr, firstbit +1, firstbit, fcc);
                    }});
                    0x52: fcmpd({{
                          uint8_t fcc;
                          if (isnan(Frs1) || isnan(Frs2))
                              fcc = 3;
                          else if (Frs1 < Frs2)
                              fcc = 1;
                          else if (Frs1 > Frs2)
                              fcc = 2;
                          else
                              fcc = 0;
                          uint8_t firstbit = 10;
                          if (FCMPCC)
                              firstbit = FCMPCC * 2 + 30;
                          Fsr = insertBits(Fsr, firstbit +1, firstbit, fcc);
                    }});
                    0x53: FpUnimpl::fcmpq();
                    0x55: fcmpes({{
                          uint8_t fcc = 0;
                          if (isnan(Frs1s) || isnan(Frs2s))
                              fault = new FpExceptionIEEE754;
                          if (Frs1s < Frs2s)
                              fcc = 1;
                          else if (Frs1s > Frs2s)
                              fcc = 2;
                          uint8_t firstbit = 10;
                          if (FCMPCC)
                              firstbit = FCMPCC * 2 + 30;
                          Fsr = insertBits(Fsr, firstbit +1, firstbit, fcc);
                    }});
                    0x56: fcmped({{
                          uint8_t fcc = 0;
                          if (isnan(Frs1) || isnan(Frs2))
                              fault = new FpExceptionIEEE754;
                          if (Frs1 < Frs2)
                              fcc = 1;
                          else if (Frs1 > Frs2)
                              fcc = 2;
                          uint8_t firstbit = 10;
                          if (FCMPCC)
                              firstbit = FCMPCC * 2 + 30;
                          Fsr = insertBits(Fsr, firstbit +1, firstbit, fcc);
                    }});
                    0x57: FpUnimpl::fcmpeq();
                    0x65: fmovrslz({{
                        if (Rs1 < 0)
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x66: fmovrdlz({{
                        if (Rs1 < 0)
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x67: FpUnimpl::fmovrqlz();
                    0x81: fmovs_fcc2({{
                        if (passesFpCondition(Fsr<35:34>, COND4))
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x82: fmovd_fcc2({{
                        if (passesFpCondition(Fsr<35:34>, COND4))
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x83: FpUnimpl::fmovq_fcc2();
                    0xA5: fmovrsnz({{
                        if (Rs1 != 0)
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0xA6: fmovrdnz({{
                        if (Rs1 != 0)
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0xA7: FpUnimpl::fmovrqnz();
                    0xC1: fmovs_fcc3({{
                        if (passesFpCondition(Fsr<37:36>, COND4))
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0xC2: fmovd_fcc3({{
                        if (passesFpCondition(Fsr<37:36>, COND4))
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0xC3: FpUnimpl::fmovq_fcc3();
                    0xC5: fmovrsgz({{
                        if (Rs1 > 0)
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0xC6: fmovrdgz({{
                        if (Rs1 > 0)
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0xC7: FpUnimpl::fmovrqgz();
                    0xE5: fmovrsgez({{
                        if (Rs1 >= 0)
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0xE6: fmovrdgez({{
                        if (Rs1 >= 0)
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0xE7: FpUnimpl::fmovrqgez();
                    0x101: fmovs_icc({{
                        if (passesCondition(Ccr<3:0>, COND4))
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x102: fmovd_icc({{
                        if (passesCondition(Ccr<3:0>, COND4))
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x103: FpUnimpl::fmovq_icc();
                    0x181: fmovs_xcc({{
                        if (passesCondition(Ccr<7:4>, COND4))
                            Frds = Frs2s;
                        else
                            Frds = Frds;
                    }});
                    0x182: fmovd_xcc({{
                        if (passesCondition(Ccr<7:4>, COND4))
                            Frd = Frs2;
                        else
                            Frd = Frd;
                    }});
                    0x183: FpUnimpl::fmovq_xcc();
                    default: FailUnimpl::fpop2();
                }
            }
            // This used to be just impdep1, but now it's a whole bunch
            // of instructions
            0x36: decode OPF{
                0x00: FailUnimpl::edge8();
                0x01: FailUnimpl::edge8n();
                0x02: FailUnimpl::edge8l();
                0x03: FailUnimpl::edge8ln();
                0x04: FailUnimpl::edge16();
                0x05: FailUnimpl::edge16n();
                0x06: FailUnimpl::edge16l();
                0x07: FailUnimpl::edge16ln();
                0x08: FailUnimpl::edge32();
                0x09: FailUnimpl::edge32n();
                0x0A: FailUnimpl::edge32l();
                0x0B: FailUnimpl::edge32ln();
                0x10: FailUnimpl::array8();
                0x12: FailUnimpl::array16();
                0x14: FailUnimpl::array32();
                0x18: BasicOperate::alignaddr({{
                    uint64_t sum = Rs1 + Rs2;
                    Rd = sum & ~7;
                    Gsr = (Gsr & ~7) | (sum & 7);
                }});
                0x19: FailUnimpl::bmask();
                0x1A: BasicOperate::alignaddresslittle({{
                    uint64_t sum = Rs1 + Rs2;
                    Rd = sum & ~7;
                    Gsr = (Gsr & ~7) | ((~sum + 1) & 7);
                }});
                0x20: FailUnimpl::fcmple16();
                0x22: FailUnimpl::fcmpne16();
                0x24: FailUnimpl::fcmple32();
                0x26: FailUnimpl::fcmpne32();
                0x28: FailUnimpl::fcmpgt16();
                0x2A: FailUnimpl::fcmpeq16();
                0x2C: FailUnimpl::fcmpgt32();
                0x2E: FailUnimpl::fcmpeq32();
                0x31: FailUnimpl::fmul8x16();
                0x33: FailUnimpl::fmul8x16au();
                0x35: FailUnimpl::fmul8x16al();
                0x36: FailUnimpl::fmul8sux16();
                0x37: FailUnimpl::fmul8ulx16();
                0x38: FailUnimpl::fmuld8sux16();
                0x39: FailUnimpl::fmuld8ulx16();
                0x3A: Trap::fpack32({{fault = new IllegalInstruction;}});
                0x3B: Trap::fpack16({{fault = new IllegalInstruction;}});
                0x3D: Trap::fpackfix({{fault = new IllegalInstruction;}});
                0x3E: Trap::pdist({{fault = new IllegalInstruction;}});
                0x48: BasicOperate::faligndata({{
                        uint64_t msbX = Frs1.udw;
                        uint64_t lsbX = Frs2.udw;
                        // Some special cases need to be split out, first
                        // because they're the most likely to be used, and
                        // second because otherwise, we end up shifting by
                        // greater than the width of the type being shifted,
                        // namely 64, which produces undefined results
                        // according to the C standard.
                        switch (Gsr<2:0>) {
                          case 0:
                            Frd.udw = msbX;
                            break;
                          case 8:
                            Frd.udw = lsbX;
                            break;
                          default:
                            uint64_t msbShift = Gsr<2:0> * 8;
                            uint64_t lsbShift = (8 - Gsr<2:0>) * 8;
                            uint64_t msbMask = ((uint64_t)(-1)) >> msbShift;
                            uint64_t lsbMask = ((uint64_t)(-1)) << lsbShift;
                            Frd.udw = ((msbX & msbMask) << msbShift) |
                                      ((lsbX & lsbMask) >> lsbShift);
                        }
                }});
                0x4B: Trap::fpmerge({{fault = new IllegalInstruction;}});
                0x4C: FailUnimpl::bshuffle();
                0x4D: FailUnimpl::fexpand();
                0x50: FailUnimpl::fpadd16();
                0x51: FailUnimpl::fpadd16s();
                0x52: FailUnimpl::fpadd32();
                0x53: FailUnimpl::fpadd32s();
                0x54: FailUnimpl::fpsub16();
                0x55: FailUnimpl::fpsub16s();
                0x56: FailUnimpl::fpsub32();
                0x57: FailUnimpl::fpsub32s();
                0x60: FpBasic::fzero({{Frd.df = 0;}});
                0x61: FpBasic::fzeros({{Frds.sf = 0;}});
                0x62: FailUnimpl::fnor();
                0x63: FailUnimpl::fnors();
                0x64: FailUnimpl::fandnot2();
                0x65: FailUnimpl::fandnot2s();
                0x66: FpBasic::fnot2({{
                        Frd.df = (double)(~((uint64_t)Frs2.df));
                }});
                0x67: FpBasic::fnot2s({{
                        Frds.sf = (float)(~((uint32_t)Frs2s.sf));
                }});
                0x68: FailUnimpl::fandnot1();
                0x69: FailUnimpl::fandnot1s();
                0x6A: FpBasic::fnot1({{
                        Frd.df = (double)(~((uint64_t)Frs1.df));
                }});
                0x6B: FpBasic::fnot1s({{
                        Frds.sf = (float)(~((uint32_t)Frs1s.sf));
                }});
                0x6C: FailUnimpl::fxor();
                0x6D: FailUnimpl::fxors();
                0x6E: FailUnimpl::fnand();
                0x6F: FailUnimpl::fnands();
                0x70: FailUnimpl::fand();
                0x71: FailUnimpl::fands();
                0x72: FailUnimpl::fxnor();
                0x73: FailUnimpl::fxnors();
                0x74: FpBasic::fsrc1({{Frd.udw = Frs1.udw;}});
                0x75: FpBasic::fsrc1s({{Frds.uw = Frs1s.uw;}});
                0x76: FailUnimpl::fornot2();
                0x77: FailUnimpl::fornot2s();
                0x78: FpBasic::fsrc2({{Frd.udw = Frs2.udw;}});
                0x79: FpBasic::fsrc2s({{Frds.uw = Frs2s.uw;}});
                0x7A: FailUnimpl::fornot1();
                0x7B: FailUnimpl::fornot1s();
                0x7C: FailUnimpl::for();
                0x7D: FailUnimpl::fors();
                0x7E: FpBasic::fone({{Frd.udw = std::numeric_limits<uint64_t>::max();}});
                0x7F: FpBasic::fones({{Frds.uw = std::numeric_limits<uint32_t>::max();}});
                0x80: Trap::shutdown({{fault = new IllegalInstruction;}});
                0x81: FailUnimpl::siam();
            }
            // M5 special opcodes use the reserved IMPDEP2A opcode space
            0x37: decode M5FUNC {
#if FULL_SYSTEM
                format BasicOperate {
                    // we have 7 bits of space here to play with...
                    0x21: m5exit({{PseudoInst::m5exit(xc->tcBase(), O0);
                                  }}, No_OpClass, IsNonSpeculative);
                    0x50: m5readfile({{
                                     O0 = PseudoInst::readfile(xc->tcBase(), O0, O1, O2);
                                     }}, IsNonSpeculative);
                    0x51: m5break({{PseudoInst::debugbreak(xc->tcBase());
                                  }}, IsNonSpeculative);
                    0x54: m5panic({{
                                  SparcISA::PCState pc = PCS;
                                  panic("M5 panic instruction called at pc=%#x.", pc.pc());
                                  }}, No_OpClass, IsNonSpeculative);
                }
#endif
                default: Trap::impdep2({{fault = new IllegalInstruction;}});
            }
            0x38: Branch::jmpl({{
                Addr target = Rs1 + Rs2_or_imm13;
                if (target & 0x3) {
                    fault = new MemAddressNotAligned;
                } else {
                    SparcISA::PCState pc = PCS;
                    if (Pstate<3:>)
                        Rd = (pc.pc())<31:0>;
                    else
                        Rd = pc.pc();
                    pc.nnpc(target);
                    PCS = pc;
                }
            }});
            0x39: Branch::return({{
                Addr target = Rs1 + Rs2_or_imm13;
                if (fault == NoFault) {
                    // Check for fills which are higher priority than alignment
                    // faults.
                    if (Canrestore == 0) {
                        if (Otherwin)
                            fault = new FillNOther(4*Wstate<5:3>);
                        else
                            fault = new FillNNormal(4*Wstate<2:0>);
                    } else if (target & 0x3) { // Check for alignment faults
                        fault = new MemAddressNotAligned;
                    } else {
                        SparcISA::PCState pc = PCS;
                        pc.nnpc(target);
                        PCS = pc;
                        Cwp = (Cwp - 1 + NWindows) % NWindows;
                        Cansave = Cansave + 1;
                        Canrestore = Canrestore - 1;
                    }
                }
            }});
            0x3A: decode CC
            {
                0x0: Trap::tcci({{
                    if (passesCondition(Ccr<3:0>, COND2)) {
                        int lTrapNum = I ? (Rs1 + SW_TRAP) : (Rs1 + Rs2);
                        DPRINTF(Sparc, "The trap number is %d\n", lTrapNum);
                        fault = new TrapInstruction(lTrapNum);
                    }
                }}, IsSerializeAfter, IsNonSpeculative, IsSyscall);
                0x2: Trap::tccx({{
                    if (passesCondition(Ccr<7:4>, COND2)) {
                        int lTrapNum = I ? (Rs1 + SW_TRAP) : (Rs1 + Rs2);
                        DPRINTF(Sparc, "The trap number is %d\n", lTrapNum);
                        fault = new TrapInstruction(lTrapNum);
                    }
                }}, IsSerializeAfter, IsNonSpeculative, IsSyscall);
            }
            0x3B: Nop::flush({{/*Instruction memory flush*/}}, IsWriteBarrier,
                          MemWriteOp);
            0x3C: save({{
                if (Cansave == 0) {
                    if (Otherwin)
                        fault = new SpillNOther(4*Wstate<5:3>);
                    else
                        fault = new SpillNNormal(4*Wstate<2:0>);
                } else if (Cleanwin - Canrestore == 0) {
                    fault = new CleanWindow;
                } else {
                    Cwp = (Cwp + 1) % NWindows;
                    Rd_next = Rs1 + Rs2_or_imm13;
                    Cansave = Cansave - 1;
                    Canrestore = Canrestore + 1;
                }
            }});
            0x3D: restore({{
                if (Canrestore == 0) {
                    if (Otherwin)
                        fault = new FillNOther(4*Wstate<5:3>);
                    else
                        fault = new FillNNormal(4*Wstate<2:0>);
                } else {
                    Cwp = (Cwp - 1 + NWindows) % NWindows;
                    Rd_prev = Rs1 + Rs2_or_imm13;
                    Cansave = Cansave + 1;
                    Canrestore = Canrestore - 1;
                }
            }});
            0x3E: decode FCN {
                0x0: Priv::done({{
                    Cwp = Tstate<4:0>;
                    Pstate = Tstate<20:8>;
                    Asi = Tstate<31:24>;
                    Ccr = Tstate<39:32>;
                    Gl = Tstate<42:40>;
                    Hpstate = Htstate;
                    SparcISA::PCState pc = PCS;
                    pc.npc(Tnpc);
                    pc.nnpc(Tnpc + 4);
                    PCS = pc;
                    Tl = Tl - 1;
                }}, checkTl=true);
                0x1: Priv::retry({{
                    Cwp = Tstate<4:0>;
                    Pstate = Tstate<20:8>;
                    Asi = Tstate<31:24>;
                    Ccr = Tstate<39:32>;
                    Gl = Tstate<42:40>;
                    Hpstate = Htstate;
                    SparcISA::PCState pc = PCS;
                    pc.npc(Tpc);
                    pc.nnpc(Tnpc);
                    PCS = pc;
                    Tl = Tl - 1;
                }}, checkTl=true);
            }
        }
    }
    0x3: decode OP3 {
        format Load {
            0x00: lduw({{Rd = Mem.uw;}});
            0x01: ldub({{Rd = Mem.ub;}});
            0x02: lduh({{Rd = Mem.uhw;}});
            0x03: ldtw({{
                        RdLow = (Mem.tuw).a;
                        RdHigh = (Mem.tuw).b;
            }});
        }
        format Store {
            0x04: stw({{Mem.uw = Rd.sw;}});
            0x05: stb({{Mem.ub = Rd.sb;}});
            0x06: sth({{Mem.uhw = Rd.shw;}});
            0x07: sttw({{
                      // This temporary needs to be here so that the parser
                      // will correctly identify this instruction as a store.
                      // It's probably either the parenthesis or referencing
                      // the member variable that throws confuses it.
                      Twin32_t temp;
                      temp.a = RdLow<31:0>;
                      temp.b = RdHigh<31:0>;
                      Mem.tuw = temp;
                  }});
        }
        format Load {
            0x08: ldsw({{Rd = (int32_t)Mem.sw;}});
            0x09: ldsb({{Rd = (int8_t)Mem.sb;}});
            0x0A: ldsh({{Rd = (int16_t)Mem.shw;}});
            0x0B: ldx({{Rd = (int64_t)Mem.sdw;}});
        }
        0x0D: Swap::ldstub({{Mem.ub = 0xFF;}},
                           {{
                               uint8_t tmp = mem_data;
                               Rd.ub = tmp;
                           }}, MEM_SWAP);
        0x0E: Store::stx({{Mem.udw = Rd}});
        0x0F: Swap::swap({{Mem.uw = Rd.uw}},
                         {{
                               uint32_t tmp = mem_data;
                               Rd.uw = tmp;
                         }}, MEM_SWAP);
        format LoadAlt {
            0x10: lduwa({{Rd = Mem.uw;}});
            0x11: lduba({{Rd = Mem.ub;}});
            0x12: lduha({{Rd = Mem.uhw;}});
            0x13: decode EXT_ASI {
                // ASI_LDTD_AIUP
                0x22: TwinLoad::ldtx_aiup(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTD_AIUS
                0x23: TwinLoad::ldtx_aius(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_QUAD_LDD
                0x24: TwinLoad::ldtx_quad_ldd(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_REAL
                0x26: TwinLoad::ldtx_real(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_N
                0x27: TwinLoad::ldtx_n(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_AIUP_L
                0x2A: TwinLoad::ldtx_aiup_l(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_AIUS_L
                0x2B: TwinLoad::ldtx_aius_l(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_L
                0x2C: TwinLoad::ldtx_l(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_REAL_L
                0x2E: TwinLoad::ldtx_real_l(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_N_L
                0x2F: TwinLoad::ldtx_n_l(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_P
                0xE2: TwinLoad::ldtx_p(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_S
                0xE3: TwinLoad::ldtx_s(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_PL
                0xEA: TwinLoad::ldtx_pl(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                // ASI_LDTX_SL
                0xEB: TwinLoad::ldtx_sl(
                    {{RdLow.udw = (Mem.tudw).a;
                      RdHigh.udw = (Mem.tudw).b;}});
                default: ldtwa({{
                        RdLow = (Mem.tuw).a;
                        RdHigh = (Mem.tuw).b;}});
            }
        }
        format StoreAlt {
            0x14: stwa({{Mem.uw = Rd;}});
            0x15: stba({{Mem.ub = Rd;}});
            0x16: stha({{Mem.uhw = Rd;}});
            0x17: sttwa({{
                      // This temporary needs to be here so that the parser
                      // will correctly identify this instruction as a store.
                      // It's probably either the parenthesis or referencing
                      // the member variable that throws confuses it.
                      Twin32_t temp;
                      temp.a = RdLow<31:0>;
                      temp.b = RdHigh<31:0>;
                      Mem.tuw = temp;
                  }});
        }
        format LoadAlt {
            0x18: ldswa({{Rd = (int32_t)Mem.sw;}});
            0x19: ldsba({{Rd = (int8_t)Mem.sb;}});
            0x1A: ldsha({{Rd = (int16_t)Mem.shw;}});
            0x1B: ldxa({{Rd = (int64_t)Mem.sdw;}});
        }
        0x1D: SwapAlt::ldstuba({{Mem.ub = 0xFF;}},
                           {{
                               uint8_t tmp = mem_data;
                               Rd.ub = tmp;
                           }}, MEM_SWAP);
        0x1E: StoreAlt::stxa({{Mem.udw = Rd}});
        0x1F: SwapAlt::swapa({{Mem.uw = Rd.uw}},
                         {{
                               uint32_t tmp = mem_data;
                               Rd.uw = tmp;
                         }}, MEM_SWAP);

        format Trap {
            0x20: Load::ldf({{Frds.uw = Mem.uw;}});
            0x21: decode RD {
                0x0: Load::ldfsr({{fault = checkFpEnableFault(xc);
                                     if (fault)
                                         return fault;
                                   Fsr = Mem.uw | Fsr<63:32>;}});
                0x1: Load::ldxfsr({{fault = checkFpEnableFault(xc);
                                     if (fault)
                                         return fault;
                                    Fsr = Mem.udw;}});
                default: FailUnimpl::ldfsrOther();
            }
            0x22: ldqf({{fault = new FpDisabled;}});
            0x23: Load::lddf({{Frd.udw = Mem.udw;}});
            0x24: Store::stf({{Mem.uw = Frds.uw;}});
            0x25: decode RD {
                0x0: StoreFsr::stfsr({{fault = checkFpEnableFault(xc);
                                       if (fault)
                                           return fault;
                                       Mem.uw = Fsr<31:0>;}});
                0x1: StoreFsr::stxfsr({{fault = checkFpEnableFault(xc);
                                        if (fault)
                                            return fault;
                                        Mem.udw = Fsr;}});
                default: FailUnimpl::stfsrOther();
            }
            0x26: stqf({{fault = new FpDisabled;}});
            0x27: Store::stdf({{Mem.udw = Frd.udw;}});
            0x2D: Nop::prefetch({{ }});
            0x30: LoadAlt::ldfa({{Frds.uw = Mem.uw;}});
            0x32: ldqfa({{fault = new FpDisabled;}});
            format LoadAlt {
                0x33: decode EXT_ASI {
                    // ASI_NUCLEUS
                    0x04: FailUnimpl::lddfa_n();
                    // ASI_NUCLEUS_LITTLE
                    0x0C: FailUnimpl::lddfa_nl();
                    // ASI_AS_IF_USER_PRIMARY
                    0x10: FailUnimpl::lddfa_aiup();
                    // ASI_AS_IF_USER_PRIMARY_LITTLE
                    0x18: FailUnimpl::lddfa_aiupl();
                    // ASI_AS_IF_USER_SECONDARY
                    0x11: FailUnimpl::lddfa_aius();
                    // ASI_AS_IF_USER_SECONDARY_LITTLE
                    0x19: FailUnimpl::lddfa_aiusl();
                    // ASI_REAL
                    0x14: FailUnimpl::lddfa_real();
                    // ASI_REAL_LITTLE
                    0x1C: FailUnimpl::lddfa_real_l();
                    // ASI_REAL_IO
                    0x15: FailUnimpl::lddfa_real_io();
                    // ASI_REAL_IO_LITTLE
                    0x1D: FailUnimpl::lddfa_real_io_l();
                    // ASI_PRIMARY
                    0x80: FailUnimpl::lddfa_p();
                    // ASI_PRIMARY_LITTLE
                    0x88: FailUnimpl::lddfa_pl();
                    // ASI_SECONDARY
                    0x81: FailUnimpl::lddfa_s();
                    // ASI_SECONDARY_LITTLE
                    0x89: FailUnimpl::lddfa_sl();
                    // ASI_PRIMARY_NO_FAULT
                    0x82: FailUnimpl::lddfa_pnf();
                    // ASI_PRIMARY_NO_FAULT_LITTLE
                    0x8A: FailUnimpl::lddfa_pnfl();
                    // ASI_SECONDARY_NO_FAULT
                    0x83: FailUnimpl::lddfa_snf();
                    // ASI_SECONDARY_NO_FAULT_LITTLE
                    0x8B: FailUnimpl::lddfa_snfl();

                    format BlockLoad {
                        // LDBLOCKF
                        // ASI_BLOCK_AS_IF_USER_PRIMARY
                        0x16: FailUnimpl::ldblockf_aiup();
                        // ASI_BLOCK_AS_IF_USER_SECONDARY
                        0x17: FailUnimpl::ldblockf_aius();
                        // ASI_BLOCK_AS_IF_USER_PRIMARY_LITTLE
                        0x1E: FailUnimpl::ldblockf_aiupl();
                        // ASI_BLOCK_AS_IF_USER_SECONDARY_LITTLE
                        0x1F: FailUnimpl::ldblockf_aiusl();
                        // ASI_BLOCK_PRIMARY
                        0xF0: ldblockf_p({{Frd_N.udw = Mem.udw;}});
                        // ASI_BLOCK_SECONDARY
                        0xF1: FailUnimpl::ldblockf_s();
                        // ASI_BLOCK_PRIMARY_LITTLE
                        0xF8: FailUnimpl::ldblockf_pl();
                        // ASI_BLOCK_SECONDARY_LITTLE
                        0xF9: FailUnimpl::ldblockf_sl();
                    }

                    // LDSHORTF
                    // ASI_FL8_PRIMARY
                    0xD0: FailUnimpl::ldshortf_8p();
                    // ASI_FL8_SECONDARY
                    0xD1: FailUnimpl::ldshortf_8s();
                    // ASI_FL8_PRIMARY_LITTLE
                    0xD8: FailUnimpl::ldshortf_8pl();
                    // ASI_FL8_SECONDARY_LITTLE
                    0xD9: FailUnimpl::ldshortf_8sl();
                    // ASI_FL16_PRIMARY
                    0xD2: FailUnimpl::ldshortf_16p();
                    // ASI_FL16_SECONDARY
                    0xD3: FailUnimpl::ldshortf_16s();
                    // ASI_FL16_PRIMARY_LITTLE
                    0xDA: FailUnimpl::ldshortf_16pl();
                    // ASI_FL16_SECONDARY_LITTLE
                    0xDB: FailUnimpl::ldshortf_16sl();
                    // Not an ASI which is legal with lddfa
                    default: Trap::lddfa_bad_asi(
                        {{fault = new DataAccessException;}});
                }
            }
            0x34: Store::stfa({{Mem.uw = Frds.uw;}});
            0x36: stqfa({{fault = new FpDisabled;}});
            format StoreAlt {
                0x37: decode EXT_ASI {
                    // ASI_NUCLEUS
                    0x04: FailUnimpl::stdfa_n();
                    // ASI_NUCLEUS_LITTLE
                    0x0C: FailUnimpl::stdfa_nl();
                    // ASI_AS_IF_USER_PRIMARY
                    0x10: FailUnimpl::stdfa_aiup();
                    // ASI_AS_IF_USER_PRIMARY_LITTLE
                    0x18: FailUnimpl::stdfa_aiupl();
                    // ASI_AS_IF_USER_SECONDARY
                    0x11: FailUnimpl::stdfa_aius();
                    // ASI_AS_IF_USER_SECONDARY_LITTLE
                    0x19: FailUnimpl::stdfa_aiusl();
                    // ASI_REAL
                    0x14: FailUnimpl::stdfa_real();
                    // ASI_REAL_LITTLE
                    0x1C: FailUnimpl::stdfa_real_l();
                    // ASI_REAL_IO
                    0x15: FailUnimpl::stdfa_real_io();
                    // ASI_REAL_IO_LITTLE
                    0x1D: FailUnimpl::stdfa_real_io_l();
                    // ASI_PRIMARY
                    0x80: FailUnimpl::stdfa_p();
                    // ASI_PRIMARY_LITTLE
                    0x88: FailUnimpl::stdfa_pl();
                    // ASI_SECONDARY
                    0x81: FailUnimpl::stdfa_s();
                    // ASI_SECONDARY_LITTLE
                    0x89: FailUnimpl::stdfa_sl();
                    // ASI_PRIMARY_NO_FAULT
                    0x82: FailUnimpl::stdfa_pnf();
                    // ASI_PRIMARY_NO_FAULT_LITTLE
                    0x8A: FailUnimpl::stdfa_pnfl();
                    // ASI_SECONDARY_NO_FAULT
                    0x83: FailUnimpl::stdfa_snf();
                    // ASI_SECONDARY_NO_FAULT_LITTLE
                    0x8B: FailUnimpl::stdfa_snfl();

                    format BlockStore {
                        // STBLOCKF
                        // ASI_BLOCK_AS_IF_USER_PRIMARY
                        0x16: FailUnimpl::stblockf_aiup();
                        // ASI_BLOCK_AS_IF_USER_SECONDARY
                        0x17: FailUnimpl::stblockf_aius();
                        // ASI_BLOCK_AS_IF_USER_PRIMARY_LITTLE
                        0x1E: FailUnimpl::stblockf_aiupl();
                        // ASI_BLOCK_AS_IF_USER_SECONDARY_LITTLE
                        0x1F: FailUnimpl::stblockf_aiusl();
                        // ASI_BLOCK_PRIMARY
                        0xF0: stblockf_p({{Mem.udw = Frd_N.udw;}});
                        // ASI_BLOCK_SECONDARY
                        0xF1: FailUnimpl::stblockf_s();
                        // ASI_BLOCK_PRIMARY_LITTLE
                        0xF8: FailUnimpl::stblockf_pl();
                        // ASI_BLOCK_SECONDARY_LITTLE
                        0xF9: FailUnimpl::stblockf_sl();
                    }

                    // STSHORTF
                    // ASI_FL8_PRIMARY
                    0xD0: FailUnimpl::stshortf_8p();
                    // ASI_FL8_SECONDARY
                    0xD1: FailUnimpl::stshortf_8s();
                    // ASI_FL8_PRIMARY_LITTLE
                    0xD8: FailUnimpl::stshortf_8pl();
                    // ASI_FL8_SECONDARY_LITTLE
                    0xD9: FailUnimpl::stshortf_8sl();
                    // ASI_FL16_PRIMARY
                    0xD2: FailUnimpl::stshortf_16p();
                    // ASI_FL16_SECONDARY
                    0xD3: FailUnimpl::stshortf_16s();
                    // ASI_FL16_PRIMARY_LITTLE
                    0xDA: FailUnimpl::stshortf_16pl();
                    // ASI_FL16_SECONDARY_LITTLE
                    0xDB: FailUnimpl::stshortf_16sl();
                    // Not an ASI which is legal with lddfa
                    default: Trap::stdfa_bad_asi(
                        {{fault = new DataAccessException;}});
                }
            }
            0x3C: CasAlt::casa({{
                               mem_data = htog(Rs2.uw);
                               Mem.uw = Rd.uw;}},
                         {{
                               uint32_t tmp = mem_data;
                               Rd.uw = tmp;
                         }}, MEM_SWAP_COND);
            0x3D: Nop::prefetcha({{ }});
            0x3E: CasAlt::casxa({{mem_data = gtoh(Rs2);
                                Mem.udw = Rd.udw; }},
                         {{ Rd.udw = mem_data; }}, MEM_SWAP_COND);
        }
    }
}