decoder.isa

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· ISA 代码 · 共 1,399 行 · 第 1/5 页

            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({{
                    if(Pstate<3:>)
                        Rd = (xc->readPC())<31:0>;
                    else
                        Rd = xc->readPC();}});
                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: Trap::movccfcc({{fault = new FpDisabled;}});
                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{