lib/Target/PowerPC/PPCScheduleE500mc.td

   1 //===-- PPCScheduleE500mc.td - e500mc 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 e500mc 32-bit
  11 // Power processor.
  12 //
  13 // All information is derived from the "e500mc Core Reference Manual",
  14 // Freescale Document Number E500MCRM, Rev. 1, 03/2012.
  15 //
  16 //===----------------------------------------------------------------------===//
  17 // Relevant functional units in the Freescale e500mc core:
  18 //
  19 //  * Decode & Dispatch
  20 //    Can dispatch up to 2 instructions per clock cycle to either the GPR Issue
  21 //    queues (GIQx), FP Issue Queue (FIQ), 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: SFX0, SFX1, BU, FPU, LSU, CFX.
  27 //    Some instructions can only execute in SFX0 but not SFX1.
  28 //    The CFX has a bypass path, allowing non-divide instructions to execute
  29 //    while a divide instruction is executed.
  30 def E500_SFX0  : FuncUnit; // Simple unit 0
  31 def E500_SFX1  : FuncUnit; // Simple unit 1
  32 def E500_BU    : FuncUnit; // Branch unit
  33 def E500_CFX_DivBypass
  34                : FuncUnit; // CFX divide bypass path
  35 def E500_CFX_0 : FuncUnit; // CFX pipeline
  36 def E500_LSU_0 : FuncUnit; // LSU pipeline
  37 def E500_FPU_0 : FuncUnit; // FPU pipeline
  38
  39 def E500_GPR_Bypass : Bypass;
  40 def E500_FPR_Bypass : Bypass;
  41 def E500_CR_Bypass  : Bypass;
  42
  43 def PPCE500mcItineraries : ProcessorItineraries<
  44   [E500_DIS0, E500_DIS1, E500_SFX0, E500_SFX1, E500_BU, E500_CFX_DivBypass,
  45    E500_CFX_0, E500_LSU_0, E500_FPU_0],
  46   [E500_CR_Bypass, E500_GPR_Bypass, E500_FPR_Bypass], [
  47   InstrItinData<IIC_IntSimple,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  48                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
  49                                  [4, 1, 1], // Latency = 1
  50                                  [E500_GPR_Bypass,
  51                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  52   InstrItinData<IIC_IntGeneral,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  53                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
  54                                  [4, 1, 1], // Latency = 1
  55                                  [E500_GPR_Bypass,
  56                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  57   InstrItinData<IIC_IntCompare,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  58                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
  59                                  [5, 1, 1], // Latency = 1 or 2
  60                                  [E500_CR_Bypass,
  61                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  62   InstrItinData<IIC_IntDivW,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  63                                   InstrStage<1, [E500_CFX_0], 0>,
  64                                   InstrStage<14, [E500_CFX_DivBypass]>],
  65                                  [17, 1, 1], // Latency=4..35, Repeat= 4..35
  66                                  [E500_GPR_Bypass,
  67                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  68   InstrItinData<IIC_IntMFFS,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  69                                   InstrStage<8, [E500_FPU_0]>],
  70                                  [11], // Latency = 8
  71                                  [E500_FPR_Bypass]>,
  72   InstrItinData<IIC_IntMTFSB0,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  73                                   InstrStage<8, [E500_FPU_0]>],
  74                                  [11, 1, 1], // Latency = 8
  75                                  [NoBypass, NoBypass, NoBypass]>,
  76   InstrItinData<IIC_IntMulHW,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  77                                   InstrStage<1, [E500_CFX_0]>],
  78                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
  79                                  [E500_GPR_Bypass,
  80                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  81   InstrItinData<IIC_IntMulHWU,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  82                                   InstrStage<1, [E500_CFX_0]>],
  83                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
  84                                  [E500_GPR_Bypass,
  85                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  86   InstrItinData<IIC_IntMulLI,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  87                                   InstrStage<1, [E500_CFX_0]>],
  88                                  [7, 1, 1], // Latency = 4, Repeat rate = 1
  89                                  [E500_GPR_Bypass,
  90                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  91   InstrItinData<IIC_IntRotate,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  92                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
  93                                  [4, 1, 1], // Latency = 1
  94                                  [E500_GPR_Bypass,
  95                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
  96   InstrItinData<IIC_IntShift,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
  97                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
  98                                  [4, 1, 1], // Latency = 1
  99                                  [E500_GPR_Bypass,
 100                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
 101   InstrItinData<IIC_IntTrapW,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 102                                   InstrStage<2, [E500_SFX0]>],
 103                                  [5, 1], // Latency = 2, Repeat rate = 2
 104                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 105   InstrItinData<IIC_BrB,         [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 106                                   InstrStage<1, [E500_BU]>],
 107                                  [4, 1], // Latency = 1
 108                                  [NoBypass, E500_GPR_Bypass]>,
 109   InstrItinData<IIC_BrCR,        [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 110                                   InstrStage<1, [E500_BU]>],
 111                                  [4, 1, 1], // Latency = 1
 112                                  [E500_CR_Bypass,
 113                                   E500_CR_Bypass, E500_CR_Bypass]>,
 114   InstrItinData<IIC_BrMCR,       [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 115                                   InstrStage<1, [E500_BU]>],
 116                                  [4, 1], // Latency = 1
 117                                  [E500_CR_Bypass, E500_CR_Bypass]>,
 118   InstrItinData<IIC_BrMCRX,      [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 119                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
 120                                  [4, 1, 1], // Latency = 1
 121                                  [E500_CR_Bypass, E500_GPR_Bypass]>,
 122   InstrItinData<IIC_LdStDCBA,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 123                                   InstrStage<1, [E500_LSU_0]>],
 124                                  [6, 1], // Latency = 3, Repeat rate = 1
 125                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 126   InstrItinData<IIC_LdStDCBF,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 127                                   InstrStage<1, [E500_LSU_0]>],
 128                                  [6, 1], // Latency = 3
 129                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 130   InstrItinData<IIC_LdStDCBI,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 131                                   InstrStage<1, [E500_LSU_0]>],
 132                                  [6, 1], // Latency = 3
 133                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 134   InstrItinData<IIC_LdStLoad,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 135                                   InstrStage<1, [E500_LSU_0]>],
 136                                  [6, 1], // Latency = 3
 137                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 138   InstrItinData<IIC_LdStLoadUpd, [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 139                                   InstrStage<1, [E500_SFX0, E500_SFX1], 0>,
 140                                   InstrStage<1, [E500_LSU_0]>],
 141                                  [6, 1], // Latency = 3
 142                                  [E500_GPR_Bypass, E500_GPR_Bypass],
 143                                  2>, // 2 micro-ops
 144   InstrItinData<IIC_LdStStore,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 145                                   InstrStage<1, [E500_LSU_0]>],
 146                                  [6, 1], // Latency = 3
 147                                  [NoBypass, E500_GPR_Bypass]>,
 148   InstrItinData<IIC_LdStStoreUpd,[InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 149                                   InstrStage<1, [E500_SFX0, E500_SFX1], 0>,
 150                                   InstrStage<1, [E500_LSU_0]>],
 151                                  [6, 1], // Latency = 3
 152                                  [NoBypass, E500_GPR_Bypass],
 153                                  2>, // 2 micro-ops
 154   InstrItinData<IIC_LdStICBI,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 155                                   InstrStage<1, [E500_LSU_0]>],
 156                                  [6, 1], // Latency = 3
 157                                  [NoBypass, E500_GPR_Bypass]>,
 158   InstrItinData<IIC_LdStSTFD,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 159                                   InstrStage<1, [E500_LSU_0]>],
 160                                  [6, 1, 1], // Latency = 3
 161                                  [E500_GPR_Bypass,
 162                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
 163   InstrItinData<IIC_LdStSTFDU,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 164                                   InstrStage<1, [E500_SFX0, E500_SFX1], 0>,
 165                                   InstrStage<1, [E500_LSU_0]>],
 166                                  [6, 1, 1], // Latency = 3
 167                                  [E500_GPR_Bypass,
 168                                   E500_GPR_Bypass, E500_GPR_Bypass],
 169                                  2>, // 2 micro-ops
 170   InstrItinData<IIC_LdStLFD,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 171                                   InstrStage<1, [E500_LSU_0]>],
 172                                  [7, 1, 1], // Latency = 4
 173                                  [E500_FPR_Bypass,
 174                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
 175   InstrItinData<IIC_LdStLFDU,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 176                                   InstrStage<1, [E500_SFX0, E500_SFX1], 0>,
 177                                   InstrStage<1, [E500_LSU_0]>],
 178                                  [7, 1, 1], // Latency = 4
 179                                  [E500_FPR_Bypass,
 180                                   E500_GPR_Bypass, E500_GPR_Bypass],
 181                                  2>, // 2 micro-ops
 182   InstrItinData<IIC_LdStLHA,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 183                                   InstrStage<1, [E500_LSU_0]>],
 184                                  [6, 1], // Latency = 3
 185                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 186   InstrItinData<IIC_LdStLHAU,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 187                                   InstrStage<1, [E500_SFX0, E500_SFX1], 0>,
 188                                   InstrStage<1, [E500_LSU_0]>],
 189                                  [6, 1], // Latency = 3
 190                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 191   InstrItinData<IIC_LdStLMW,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 192                                   InstrStage<1, [E500_LSU_0]>],
 193                                  [7, 1], // Latency = r+3
 194                                  [NoBypass, E500_GPR_Bypass]>,
 195   InstrItinData<IIC_LdStLWARX,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 196                                   InstrStage<3, [E500_LSU_0]>],
 197                                  [6, 1, 1], // Latency = 3, Repeat rate = 3
 198                                  [E500_GPR_Bypass,
 199                                   E500_GPR_Bypass, E500_GPR_Bypass]>,
 200   InstrItinData<IIC_LdStSTWCX,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 201                                   InstrStage<1, [E500_LSU_0]>],
 202                                  [6, 1], // Latency = 3
 203                                  [NoBypass, E500_GPR_Bypass]>,
 204   InstrItinData<IIC_LdStSync,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 205                                   InstrStage<1, [E500_LSU_0]>]>,
 206   InstrItinData<IIC_SprMFSR,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 207                                   InstrStage<4, [E500_SFX0]>],
 208                                  [7, 1],
 209                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 210   InstrItinData<IIC_SprMTMSR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 211                                   InstrStage<2, [E500_SFX0, E500_SFX1]>],
 212                                  [5, 1], // Latency = 2, Repeat rate = 4
 213                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 214   InstrItinData<IIC_SprMTSR,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 215                                   InstrStage<1, [E500_SFX0]>],
 216                                  [5, 1],
 217                                  [NoBypass, E500_GPR_Bypass]>,
 218   InstrItinData<IIC_SprTLBSYNC,  [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 219                                   InstrStage<1, [E500_LSU_0], 0>]>,
 220   InstrItinData<IIC_SprMFCR,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 221                                   InstrStage<5, [E500_SFX0]>],
 222                                  [8, 1],
 223                                  [E500_GPR_Bypass, E500_CR_Bypass]>,
 224   InstrItinData<IIC_SprMFMSR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 225                                   InstrStage<4, [E500_SFX0]>],
 226                                  [7, 1], // Latency = 4, Repeat rate = 4
 227                                  [E500_GPR_Bypass, E500_GPR_Bypass]>,
 228   InstrItinData<IIC_SprMFSPR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 229                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
 230                                  [4, 1], // Latency = 1, Repeat rate = 1
 231                                  [E500_GPR_Bypass, E500_CR_Bypass]>,
 232   InstrItinData<IIC_SprMFTB,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 233                                   InstrStage<4, [E500_SFX0]>],
 234                                  [7, 1], // Latency = 4, Repeat rate = 4
 235                                  [NoBypass, E500_GPR_Bypass]>,
 236   InstrItinData<IIC_SprMTSPR,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 237                                   InstrStage<1, [E500_SFX0, E500_SFX1]>],
 238                                  [4, 1], // Latency = 1, Repeat rate = 1
 239                                  [E500_CR_Bypass, E500_GPR_Bypass]>,
 240   InstrItinData<IIC_SprMTSRIN,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 241                                   InstrStage<1, [E500_SFX0]>],
 242                                  [4, 1],
 243                                  [NoBypass, E500_GPR_Bypass]>,
 244   InstrItinData<IIC_FPGeneral,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 245                                   InstrStage<2, [E500_FPU_0]>],
 246                                  [11, 1, 1], // Latency = 8, Repeat rate = 2
 247                                  [E500_FPR_Bypass,
 248                                   E500_FPR_Bypass, E500_FPR_Bypass]>,
 249   InstrItinData<IIC_FPAddSub,    [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 250                                   InstrStage<4, [E500_FPU_0]>],
 251                                  [13, 1, 1], // Latency = 10, Repeat rate = 4
 252                                  [E500_FPR_Bypass,
 253                                   E500_FPR_Bypass, E500_FPR_Bypass]>,
 254   InstrItinData<IIC_FPCompare,   [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 255                                   InstrStage<2, [E500_FPU_0]>],
 256                                  [11, 1, 1], // Latency = 8, Repeat rate = 2
 257                                  [E500_CR_Bypass,
 258                                   E500_FPR_Bypass, E500_FPR_Bypass]>,
 259   InstrItinData<IIC_FPDivD,      [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 260                                   InstrStage<68, [E500_FPU_0]>],
 261                                  [71, 1, 1], // Latency = 68, Repeat rate = 68
 262                                  [E500_FPR_Bypass,
 263                                   E500_FPR_Bypass, E500_FPR_Bypass]>,
 264   InstrItinData<IIC_FPDivS,      [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 265                                   InstrStage<38, [E500_FPU_0]>],
 266                                  [41, 1, 1], // Latency = 38, Repeat rate = 38
 267                                  [E500_FPR_Bypass,
 268                                   E500_FPR_Bypass, E500_FPR_Bypass]>,
 269   InstrItinData<IIC_FPFused,     [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 270                                   InstrStage<4, [E500_FPU_0]>],
 271                                  [13, 1, 1, 1], // Latency = 10, Repeat rate = 4
 272                                  [E500_FPR_Bypass,
 273                                   E500_FPR_Bypass, E500_FPR_Bypass,
 274                                   E500_FPR_Bypass]>,
 275   InstrItinData<IIC_FPRes,       [InstrStage<1, [E500_DIS0, E500_DIS1], 0>,
 276                                   InstrStage<38, [E500_FPU_0]>],
 277                                  [41, 1], // Latency = 38, Repeat rate = 38
 278                                  [E500_FPR_Bypass, E500_FPR_Bypass]>
 279 ]>;
 280
 281 // ===---------------------------------------------------------------------===//
 282 // e500mc machine model for scheduling and other instruction cost heuristics.
 283
 284 def PPCE500mcModel : SchedMachineModel {
 285   let IssueWidth = 2;  // 2 micro-ops are dispatched per cycle.
 286   let MinLatency = -1; // OperandCycles are interpreted as MinLatency.
 287   let LoadLatency = 5; // Optimistic load latency assuming bypass.
 288                        // This is overriden by OperandCycles if the
 289                        // Itineraries are queried instead.
 290
 291   let Itineraries = PPCE500mcItineraries;
 292 }