contrib/llvm/lib/Target/PowerPC/PPCScheduleE500.td

   1 //===-- PPCScheduleE500.td - e500 Scheduling Defs ------*- tablegen -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines the itinerary class data for the Freescale e500 32-bit
  11 // Power processor.
  12 //
  13 // All information is derived from the "e500 Core Reference Manual",
  14 // Freescale Document Number E500MCRM, Rev. 1, 03/2012.
  15 //
  16 //===----------------------------------------------------------------------===//
  17 // Relevant functional units in the Freescale e500 core:
  18 //
  19 //  * Decode & Dispatch
  20 //    Can dispatch up to 2 instructions per clock cycle to either the GPR Issue
  21 //    queues (GIQx) or Branch issue queue (BIQ).
  22 def E500_DIS0 : FuncUnit; // Dispatch stage - insn 1
  23 def E500_DIS1 : FuncUnit; // Dispatch stage - insn 2
  24
  25 //  * Execute
  26 //    6 pipelined execution units: SU0, SU1, BU, LSU, MU.
  27 //    Some instructions can only execute in SU0 but not SU1.
  28 def E500_SU0  : FuncUnit; // Simple unit 0
  29 def E500_SU1  : FuncUnit; // Simple unit 1
  30 def E500_BU    : FuncUnit; // Branch unit
  31 def E500_MU    : FuncUnit; // MU pipeline
  32 def E500_LSU_0 : FuncUnit; // LSU pipeline
  33
  34 def E500_GPR_Bypass : Bypass;
  35 def E500_CR_Bypass  : Bypass;
  36 def E500_DivBypass  : Bypass;
  37
  38 def PPCE500Itineraries : ProcessorItineraries<
  39   [E500_DIS0, E500_DIS1, E500_SU0, E500_SU1, E500_BU,
  40    E500_MU, E500_LSU_0],
  41   [E500_CR_Bypass, E500_GPR_Bypass, E500_DivBypass], [
  42   InstrItinData<IIC_IntSimple,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  43                                   InstrStage<1, [E500_SU0, E500_SU1]>],
  44                                  [4, 1, 1], // Latency = 1
  45                                  [E500_GPR_Bypass,
  46                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  47   InstrItinData<IIC_IntGeneral,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  48                                   InstrStage<1, [E500_SU0, E500_SU1]>],
  49                                  [4, 1, 1], // Latency = 1
  50                                  [E500_GPR_Bypass,
  51                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  52   InstrItinData<IIC_IntISEL,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  53                                   InstrStage<1, [E500_SU0, E500_SU1]>],
  54                                  [4, 1, 1, 1], // Latency = 1
  55                                  [E500_GPR_Bypass,
  56                                   E500_GPR_Bypass, E500_GPR_Bypass,
  57                                   E500_CR_Bypass]>,
  58   InstrItinData<IIC_IntCompare,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  59                                   InstrStage<1, [E500_SU0, E500_SU1]>],
  60                                  [5, 1, 1], // Latency = 1 or 2
  61                                  [E500_CR_Bypass,
  62                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  63   InstrItinData<IIC_IntDivW,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  64                                   InstrStage<1, [E500_MU], 0>,
  65                                   InstrStage<14, [E500_MU]>],
  66                                  [17, 1, 1], // Latency=4..35, Repeat= 4..35
  67                                  [E500_GPR_Bypass,
  68                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  69   InstrItinData<IIC_IntMulHW,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  70                                   InstrStage<4, [E500_MU]>],
  71                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
  72                                  [E500_GPR_Bypass,
  73                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  74   InstrItinData<IIC_IntMulHWU,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  75                                   InstrStage<4, [E500_MU]>],
  76                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
  77                                  [E500_GPR_Bypass,
  78                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  79   InstrItinData<IIC_IntMulLI,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  80                                   InstrStage<4, [E500_MU]>],
  81                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
  82                                  [E500_GPR_Bypass,
  83                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  84   InstrItinData<IIC_IntRotate,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  85                                   InstrStage<1, [E500_SU0, E500_SU1]>],
  86                                  [4, 1, 1], // Latency = 1
  87                                  [E500_GPR_Bypass,
  88                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  89   InstrItinData<IIC_IntShift,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  90                                   InstrStage<1, [E500_SU0, E500_SU1]>],
  91                                  [4, 1, 1], // Latency = 1
  92                                  [E500_GPR_Bypass,
  93                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  94   InstrItinData<IIC_IntTrapW,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  95                                   InstrStage<2, [E500_SU0]>],
  96                                  [5, 1], // Latency = 2, Repeat rate = 2
  97                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
  98   InstrItinData<IIC_BrB,         [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  99                                   InstrStage<1, [E500_BU]>],
 100                                  [4, 1], // Latency = 1
 101                                  [NoBypass, E500_GPR_Bypass]>,
 102   InstrItinData<IIC_BrCR,        [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 103                                   InstrStage<1, [E500_BU]>],
 104                                  [4, 1, 1], // Latency = 1
 105                                  [E500_CR_Bypass,
 106                                   E500_CR_Bypass, E500_CR_Bypass]>,
 107   InstrItinData<IIC_BrMCR,       [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 108                                   InstrStage<1, [E500_BU]>],
 109                                  [4, 1], // Latency = 1
 110                                  [E500_CR_Bypass, E500_CR_Bypass]>,
 111   InstrItinData<IIC_BrMCRX,      [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 112                                   InstrStage<1, [E500_SU0, E500_SU1]>],
 113                                  [4, 1, 1], // Latency = 1
 114                                  [E500_CR_Bypass, E500_GPR_Bypass]>,
 115   InstrItinData<IIC_LdStDCBA,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 116                                   InstrStage<1, [E500_LSU_0]>],
 117                                  [6, 1], // Latency = 3, Repeat rate = 1
 118                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 119   InstrItinData<IIC_LdStDCBF,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 120                                   InstrStage<1, [E500_LSU_0]>],
 121                                  [6, 1], // Latency = 3
 122                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 123   InstrItinData<IIC_LdStDCBI,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 124                                   InstrStage<1, [E500_LSU_0]>],
 125                                  [6, 1], // Latency = 3
 126                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 127   InstrItinData<IIC_LdStLoad,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 128                                   InstrStage<1, [E500_LSU_0]>],
 129                                  [6, 1], // Latency = 3
 130                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 131   InstrItinData<IIC_LdStLoadUpd, [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 132                                   InstrStage<1, [E500_SU0, E500_SU1], 0>,
 133                                   InstrStage<1, [E500_LSU_0]>],
 134                                  [6, 1], // Latency = 3
 135                                  [E500_GPR_Bypass, E500_GPR_Bypass],
 136                                  2>, // 2 micro-ops
 137   InstrItinData<IIC_LdStLoadUpdX,[InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 138                                   InstrStage<1, [E500_SU0, E500_SU1], 0>,
 139                                   InstrStage<1, [E500_LSU_0]>],
 140                                  [6, 1], // Latency = 3
 141                                  [E500_GPR_Bypass, E500_GPR_Bypass],
 142                                  2>, // 2 micro-ops
 143   InstrItinData<IIC_LdStStore,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 144                                   InstrStage<1, [E500_LSU_0]>],
 145                                  [6, 1], // Latency = 3
 146                                  [NoBypass, E500_GPR_Bypass]>,
 147   InstrItinData<IIC_LdStStoreUpd,[InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 148                                   InstrStage<1, [E500_SU0, E500_SU1], 0>,
 149                                   InstrStage<1, [E500_LSU_0]>],
 150                                  [6, 1], // Latency = 3
 151                                  [NoBypass, E500_GPR_Bypass],
 152                                  2>, // 2 micro-ops
 153   InstrItinData<IIC_LdStICBI,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 154                                   InstrStage<1, [E500_LSU_0]>],
 155                                  [6, 1], // Latency = 3
 156                                  [NoBypass, E500_GPR_Bypass]>,
 157   InstrItinData<IIC_LdStLHA,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 158                                   InstrStage<1, [E500_LSU_0]>],
 159                                  [6, 1], // Latency = 3
 160                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 161   InstrItinData<IIC_LdStLHAU,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 162                                   InstrStage<1, [E500_SU0, E500_SU1], 0>,
 163                                   InstrStage<1, [E500_LSU_0]>],
 164                                  [6, 1], // Latency = 3
 165                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 166   InstrItinData<IIC_LdStLHAUX,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 167                                   InstrStage<1, [E500_SU0, E500_SU1], 0>,
 168                                   InstrStage<1, [E500_LSU_0]>],
 169                                  [6, 1], // Latency = 3
 170                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 171   InstrItinData<IIC_LdStLMW,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 172                                   InstrStage<1, [E500_LSU_0]>],
 173                                  [7, 1], // Latency = r+3
 174                                  [NoBypass, E500_GPR_Bypass]>,
 175   InstrItinData<IIC_LdStLWARX,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 176                                   InstrStage<3, [E500_LSU_0]>],
 177                                  [6, 1, 1], // Latency = 3, Repeat rate = 3
 178                                  [E500_GPR_Bypass,
 179                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
 180   InstrItinData<IIC_LdStSTWCX,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 181                                   InstrStage<1, [E500_LSU_0]>],
 182                                  [6, 1], // Latency = 3
 183                                  [NoBypass, E500_GPR_Bypass]>,
 184   InstrItinData<IIC_LdStSync,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 185                                   InstrStage<1, [E500_LSU_0]>]>,
 186   InstrItinData<IIC_SprMFSR,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 187                                   InstrStage<4, [E500_SU0]>],
 188                                  [7, 1],
 189                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 190   InstrItinData<IIC_SprMTMSR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 191                                   InstrStage<2, [E500_SU0, E500_SU1]>],
 192                                  [5, 1], // Latency = 2, Repeat rate = 4
 193                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 194   InstrItinData<IIC_SprMTSR,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 195                                   InstrStage<1, [E500_SU0]>],
 196                                  [5, 1],
 197                                  [NoBypass, E500_GPR_Bypass]>,
 198   InstrItinData<IIC_SprTLBSYNC,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 199                                   InstrStage<1, [E500_LSU_0], 0>]>,
 200   InstrItinData<IIC_SprMFCR,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 201                                   InstrStage<5, [E500_SU0]>],
 202                                  [8, 1],
 203                                  [E500_GPR_Bypass, E500_CR_Bypass]>,
 204   InstrItinData<IIC_SprMFCRF,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 205                                   InstrStage<5, [E500_SU0]>],
 206                                  [8, 1],
 207                                  [E500_GPR_Bypass, E500_CR_Bypass]>,
 208   InstrItinData<IIC_SprMFPMR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 209                                   InstrStage<4, [E500_SU0]>],
 210                                  [7, 1], // Latency = 4, Repeat rate = 4
 211                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 212   InstrItinData<IIC_SprMFMSR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 213                                   InstrStage<4, [E500_SU0]>],
 214                                  [7, 1], // Latency = 4, Repeat rate = 4
 215                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 216   InstrItinData<IIC_SprMFSPR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 217                                   InstrStage<1, [E500_SU0, E500_SU1]>],
 218                                  [4, 1], // Latency = 1, Repeat rate = 1
 219                                  [E500_GPR_Bypass, E500_CR_Bypass]>,
 220   InstrItinData<IIC_SprMTPMR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 221                                   InstrStage<1, [E500_SU0]>],
 222                                  [4, 1], // Latency = 1, Repeat rate = 1
 223                                  [E500_CR_Bypass, E500_GPR_Bypass]>,
 224   InstrItinData<IIC_SprMFTB,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 225                                   InstrStage<4, [E500_SU0]>],
 226                                  [7, 1], // Latency = 4, Repeat rate = 4
 227                                  [NoBypass, E500_GPR_Bypass]>,
 228   InstrItinData<IIC_SprMTSPR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 229                                   InstrStage<1, [E500_SU0, E500_SU1]>],
 230                                  [4, 1], // Latency = 1, Repeat rate = 1
 231                                  [E500_CR_Bypass, E500_GPR_Bypass]>,
 232   InstrItinData<IIC_SprMTSRIN,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 233                                   InstrStage<1, [E500_SU0]>],
 234                                  [4, 1],
 235                                  [NoBypass, E500_GPR_Bypass]>,
 236   InstrItinData<IIC_FPDGeneral,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 237                                   InstrStage<6, [E500_MU]>],
 238                                  [9, 1, 1],  // Latency = 6, Repeat rate = 1
 239                                  [NoBypass]>,
 240   InstrItinData<IIC_FPSGeneral,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 241                                   InstrStage<4, [E500_MU]>],
 242                                  [7, 1, 1],  // Latency = 4, Repeat rate = 1
 243                                  [NoBypass]>,
 244   InstrItinData<IIC_FPDivD,      [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 245                                   InstrStage<32, [E500_MU]>],
 246                                  [35, 1, 1], // Latency = 32, Repeat rate = 32
 247                                  [E500_DivBypass]>,
 248   InstrItinData<IIC_FPDivS,      [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 249                                   InstrStage<29, [E500_MU]>],
 250                                  [32, 1, 1], // Latency = 29, Repeat rate = 29
 251                                  [E500_DivBypass]>,
 252   InstrItinData<IIC_VecGeneral,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 253                                   InstrStage<1, [E500_SU0]>],
 254                                  [4, 1, 1], // Latency = 1, Repeat rate = 1
 255                                  [NoBypass]>,
 256   InstrItinData<IIC_VecComplex,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 257                                   InstrStage<4, [E500_MU]>],
 258                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
 259                                  [NoBypass]>
 260 ]>;
 261
 262 // ===---------------------------------------------------------------------===//
 263 // e500 machine model for scheduling and other instruction cost heuristics.
 264
 265 def PPCE500Model : SchedMachineModel {
 266   let IssueWidth = 2;  // 2 micro-ops are dispatched per cycle.
 267   let LoadLatency = 5; // Optimistic load latency assuming bypass.
 268                        // This is overriden by OperandCycles if the
 269                        // Itineraries are queried instead.
 270
 271   let CompleteModel = 0;
 272
 273   let Itineraries = PPCE500Itineraries;
 274 }