1/*************************************************************************************** 2* Copyright (c) 2020-2021 Institute of Computing Technology, Chinese Academy of Sciences 3* Copyright (c) 2020-2021 Peng Cheng Laboratory 4* 5* XiangShan is licensed under Mulan PSL v2. 6* You can use this software according to the terms and conditions of the Mulan PSL v2. 7* You may obtain a copy of Mulan PSL v2 at: 8* http://license.coscl.org.cn/MulanPSL2 9* 10* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, 11* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, 12* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. 13* 14* See the Mulan PSL v2 for more details. 15***************************************************************************************/ 16 17package xiangshan.backend.rename 18 19import org.chipsalliance.cde.config.Parameters 20import chisel3._ 21import chisel3.util._ 22import utility._ 23import utils._ 24import xiangshan._ 25import xiangshan.backend.Bundles.{DecodedInst, DynInst} 26import xiangshan.backend.decode.{FusionDecodeInfo, ImmUnion, Imm_I, Imm_LUI_LOAD, Imm_U} 27import xiangshan.backend.fu.FuType 28import xiangshan.backend.rename.freelist._ 29import xiangshan.backend.rob.{RobEnqIO, RobPtr} 30import xiangshan.mem.mdp._ 31import xiangshan.ExceptionNO._ 32import xiangshan.backend.fu.FuType._ 33import xiangshan.mem.{EewLog2, GenUSWholeEmul} 34import xiangshan.mem.GenRealFlowNum 35import xiangshan.backend.trace._ 36import xiangshan.backend.decode.isa.bitfield.{OPCODE5Bit, XSInstBitFields} 37import xiangshan.backend.fu.NewCSR.CSROoORead 38import yunsuan.{VfaluType, VipuType} 39 40class Rename(implicit p: Parameters) extends XSModule with HasCircularQueuePtrHelper with HasPerfEvents { 41 42 // params alias 43 private val numRegSrc = backendParams.numRegSrc 44 private val numVecRegSrc = backendParams.numVecRegSrc 45 private val numVecRatPorts = numVecRegSrc 46 47 println(s"[Rename] numRegSrc: $numRegSrc") 48 49 val io = IO(new Bundle() { 50 val redirect = Flipped(ValidIO(new Redirect)) 51 val rabCommits = Input(new RabCommitIO) 52 // from csr 53 val singleStep = Input(Bool()) 54 // from decode 55 val in = Vec(RenameWidth, Flipped(DecoupledIO(new DecodedInst))) 56 val fusionInfo = Vec(DecodeWidth - 1, Flipped(new FusionDecodeInfo)) 57 // ssit read result 58 val ssit = Flipped(Vec(RenameWidth, Output(new SSITEntry))) 59 // waittable read result 60 val waittable = Flipped(Vec(RenameWidth, Output(Bool()))) 61 // to rename table 62 val intReadPorts = Vec(RenameWidth, Vec(2, Input(UInt(PhyRegIdxWidth.W)))) 63 val fpReadPorts = Vec(RenameWidth, Vec(3, Input(UInt(PhyRegIdxWidth.W)))) 64 val vecReadPorts = Vec(RenameWidth, Vec(numVecRatPorts, Input(UInt(PhyRegIdxWidth.W)))) 65 val v0ReadPorts = Vec(RenameWidth, Vec(1, Input(UInt(PhyRegIdxWidth.W)))) 66 val vlReadPorts = Vec(RenameWidth, Vec(1, Input(UInt(PhyRegIdxWidth.W)))) 67 val intRenamePorts = Vec(RenameWidth, Output(new RatWritePort(log2Ceil(IntLogicRegs)))) 68 val fpRenamePorts = Vec(RenameWidth, Output(new RatWritePort(log2Ceil(FpLogicRegs)))) 69 val vecRenamePorts = Vec(RenameWidth, Output(new RatWritePort(log2Ceil(VecLogicRegs)))) 70 val v0RenamePorts = Vec(RenameWidth, Output(new RatWritePort(log2Ceil(V0LogicRegs)))) 71 val vlRenamePorts = Vec(RenameWidth, Output(new RatWritePort(log2Ceil(VlLogicRegs)))) 72 // from rename table 73 val int_old_pdest = Vec(RabCommitWidth, Input(UInt(PhyRegIdxWidth.W))) 74 val fp_old_pdest = Vec(RabCommitWidth, Input(UInt(PhyRegIdxWidth.W))) 75 val vec_old_pdest = Vec(RabCommitWidth, Input(UInt(PhyRegIdxWidth.W))) 76 val v0_old_pdest = Vec(RabCommitWidth, Input(UInt(PhyRegIdxWidth.W))) 77 val vl_old_pdest = Vec(RabCommitWidth, Input(UInt(PhyRegIdxWidth.W))) 78 val int_need_free = Vec(RabCommitWidth, Input(Bool())) 79 // to dispatch1 80 val out = Vec(RenameWidth, DecoupledIO(new DynInst)) 81 // for snapshots 82 val snpt = Input(new SnapshotPort) 83 val snptLastEnq = Flipped(ValidIO(new RobPtr)) 84 val snptIsFull= Input(Bool()) 85 // debug arch ports 86 val debug_int_rat = if (backendParams.debugEn) Some(Vec(32, Input(UInt(PhyRegIdxWidth.W)))) else None 87 val debug_fp_rat = if (backendParams.debugEn) Some(Vec(32, Input(UInt(PhyRegIdxWidth.W)))) else None 88 val debug_vec_rat = if (backendParams.debugEn) Some(Vec(31, Input(UInt(PhyRegIdxWidth.W)))) else None 89 val debug_v0_rat = if (backendParams.debugEn) Some(Vec(1, Input(UInt(PhyRegIdxWidth.W)))) else None 90 val debug_vl_rat = if (backendParams.debugEn) Some(Vec(1, Input(UInt(PhyRegIdxWidth.W)))) else None 91 // perf only 92 val stallReason = new Bundle { 93 val in = Flipped(new StallReasonIO(RenameWidth)) 94 val out = new StallReasonIO(RenameWidth) 95 } 96 }) 97 98 // io alias 99 private val dispatchCanAcc = io.out.head.ready 100 101 val compressUnit = Module(new CompressUnit()) 102 // create free list and rat 103 val intFreeList = Module(new MEFreeList(IntPhyRegs)) 104 val fpFreeList = Module(new StdFreeList(FpPhyRegs - FpLogicRegs, FpLogicRegs, Reg_F)) 105 val vecFreeList = Module(new StdFreeList(VfPhyRegs - VecLogicRegs, VecLogicRegs, Reg_V, 31)) 106 val v0FreeList = Module(new StdFreeList(V0PhyRegs - V0LogicRegs, V0LogicRegs, Reg_V0, 1)) 107 val vlFreeList = Module(new StdFreeList(VlPhyRegs - VlLogicRegs, VlLogicRegs, Reg_Vl, 1)) 108 109 110 intFreeList.io.commit <> io.rabCommits 111 intFreeList.io.debug_rat.foreach(_ <> io.debug_int_rat.get) 112 fpFreeList.io.commit <> io.rabCommits 113 fpFreeList.io.debug_rat.foreach(_ <> io.debug_fp_rat.get) 114 vecFreeList.io.commit <> io.rabCommits 115 vecFreeList.io.debug_rat.foreach(_ <> io.debug_vec_rat.get) 116 v0FreeList.io.commit <> io.rabCommits 117 v0FreeList.io.debug_rat.foreach(_ <> io.debug_v0_rat.get) 118 vlFreeList.io.commit <> io.rabCommits 119 vlFreeList.io.debug_rat.foreach(_ <> io.debug_vl_rat.get) 120 121 // decide if given instruction needs allocating a new physical register (CfCtrl: from decode; RobCommitInfo: from rob) 122 def needDestReg[T <: DecodedInst](reg_t: RegType, x: T): Bool = reg_t match { 123 case Reg_I => x.rfWen 124 case Reg_F => x.fpWen 125 case Reg_V => x.vecWen 126 case Reg_V0 => x.v0Wen 127 case Reg_Vl => x.vlWen 128 } 129 def needDestRegCommit[T <: RabCommitInfo](reg_t: RegType, x: T): Bool = { 130 reg_t match { 131 case Reg_I => x.rfWen 132 case Reg_F => x.fpWen 133 case Reg_V => x.vecWen 134 case Reg_V0 => x.v0Wen 135 case Reg_Vl => x.vlWen 136 } 137 } 138 def needDestRegWalk[T <: RabCommitInfo](reg_t: RegType, x: T): Bool = { 139 reg_t match { 140 case Reg_I => x.rfWen 141 case Reg_F => x.fpWen 142 case Reg_V => x.vecWen 143 case Reg_V0 => x.v0Wen 144 case Reg_Vl => x.vlWen 145 } 146 } 147 148 // connect [redirect + walk] ports for fp & vec & int free list 149 Seq(fpFreeList, vecFreeList, intFreeList, v0FreeList, vlFreeList).foreach { case fl => 150 fl.io.redirect := io.redirect.valid 151 fl.io.walk := io.rabCommits.isWalk 152 } 153 // only when all free list and dispatch1 has enough space can we do allocation 154 // when isWalk, freelist can definitely allocate 155 intFreeList.io.doAllocate := fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && dispatchCanAcc || io.rabCommits.isWalk 156 fpFreeList.io.doAllocate := intFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && dispatchCanAcc || io.rabCommits.isWalk 157 vecFreeList.io.doAllocate := intFreeList.io.canAllocate && fpFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && dispatchCanAcc || io.rabCommits.isWalk 158 v0FreeList.io.doAllocate := intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && vlFreeList.io.canAllocate && dispatchCanAcc || io.rabCommits.isWalk 159 vlFreeList.io.doAllocate := intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && dispatchCanAcc || io.rabCommits.isWalk 160 161 // dispatch1 ready ++ float point free list ready ++ int free list ready ++ vec free list ready ++ not walk 162 val canOut = dispatchCanAcc && fpFreeList.io.canAllocate && intFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !io.rabCommits.isWalk 163 164 compressUnit.io.in.zip(io.in).foreach{ case(sink, source) => 165 sink.valid := source.valid && !io.singleStep 166 sink.bits := source.bits 167 } 168 val needRobFlags = compressUnit.io.out.needRobFlags 169 val instrSizesVec = compressUnit.io.out.instrSizes 170 val compressMasksVec = compressUnit.io.out.masks 171 172 // speculatively assign the instruction with an robIdx 173 val validCount = PopCount(io.in.zip(needRobFlags).map{ case(in, needRobFlag) => in.valid && in.bits.lastUop && needRobFlag}) // number of instructions waiting to enter rob (from decode) 174 val robIdxHead = RegInit(0.U.asTypeOf(new RobPtr)) 175 val lastCycleMisprediction = GatedValidRegNext(io.redirect.valid && !io.redirect.bits.flushItself()) 176 val robIdxHeadNext = Mux(io.redirect.valid, io.redirect.bits.robIdx, // redirect: move ptr to given rob index 177 Mux(lastCycleMisprediction, robIdxHead + 1.U, // mis-predict: not flush robIdx itself 178 Mux(canOut, robIdxHead + validCount, // instructions successfully entered next stage: increase robIdx 179 /* default */ robIdxHead))) // no instructions passed by this cycle: stick to old value 180 robIdxHead := robIdxHeadNext 181 182 /** 183 * Rename: allocate free physical register and update rename table 184 */ 185 val uops = Wire(Vec(RenameWidth, new DynInst)) 186 uops.foreach( uop => { 187 uop.srcState := DontCare 188 uop.debugInfo := DontCare 189 uop.lqIdx := DontCare 190 uop.sqIdx := DontCare 191 uop.waitForRobIdx := DontCare 192 uop.singleStep := DontCare 193 uop.snapshot := DontCare 194 uop.srcLoadDependency := DontCare 195 uop.numLsElem := DontCare 196 uop.hasException := DontCare 197 uop.useRegCache := DontCare 198 uop.regCacheIdx := DontCare 199 uop.traceBlockInPipe := DontCare 200 uop.isDropAmocasSta := DontCare 201 }) 202 private val inst = Wire(Vec(RenameWidth, new XSInstBitFields)) 203 private val isCsr = Wire(Vec(RenameWidth, Bool())) 204 private val isCsrr = Wire(Vec(RenameWidth, Bool())) 205 private val isWaitForwardCsrr = Wire(Vec(RenameWidth, Bool())) 206 private val isBlockBackwardCsrr = Wire(Vec(RenameWidth, Bool())) 207 private val fuType = uops.map(_.fuType) 208 private val fuOpType = uops.map(_.fuOpType) 209 private val vtype = uops.map(_.vpu.vtype) 210 private val sew = vtype.map(_.vsew) 211 private val lmul = vtype.map(_.vlmul) 212 private val eew = uops.map(_.vpu.veew) 213 private val mop = fuOpType.map(fuOpTypeItem => LSUOpType.getVecLSMop(fuOpTypeItem)) 214 private val isVlsType = fuType.map(fuTypeItem => isVls(fuTypeItem)) 215 private val isSegment = fuType.map(fuTypeItem => isVsegls(fuTypeItem)) 216 private val isUnitStride = fuOpType.map(fuOpTypeItem => LSUOpType.isAllUS(fuOpTypeItem)) 217 private val nf = fuOpType.zip(uops.map(_.vpu.nf)).map { case (fuOpTypeItem, nfItem) => Mux(LSUOpType.isWhole(fuOpTypeItem), 0.U, nfItem) } 218 private val mulBits = 3 // dirty code 219 private val emul = fuOpType.zipWithIndex.map { case (fuOpTypeItem, index) => 220 Mux( 221 LSUOpType.isWhole(fuOpTypeItem), 222 GenUSWholeEmul(nf(index)), 223 Mux( 224 LSUOpType.isMasked(fuOpTypeItem), 225 0.U(mulBits.W), 226 EewLog2(eew(index)) - sew(index) + lmul(index) 227 ) 228 ) 229 } 230 private val isVecUnitType = isVlsType.zip(isUnitStride).map { case (isVlsTypeItme, isUnitStrideItem) => 231 isVlsTypeItme && isUnitStrideItem 232 } 233 private val isfofFixVlUop = uops.map{x => x.vpu.isVleff && x.lastUop} 234 private val instType = isSegment.zip(mop).map { case (isSegementItem, mopItem) => Cat(isSegementItem, mopItem) } 235 // There is no way to calculate the 'flow' for 'unit-stride' exactly: 236 // Whether 'unit-stride' needs to be split can only be known after obtaining the address. 237 // For scalar instructions, this is not handled here, and different assignments are done later according to the situation. 238 private val numLsElem = instType.zipWithIndex.map { case (instTypeItem, index) => 239 Mux( 240 isVecUnitType(index), 241 VecMemUnitStrideMaxFlowNum.U, 242 GenRealFlowNum(instTypeItem, emul(index), lmul(index), eew(index), sew(index)) 243 ) 244 } 245 uops.zipWithIndex.map { case(u, i) => 246 u.numLsElem := Mux(io.in(i).valid & isVlsType(i) && !isfofFixVlUop(i), numLsElem(i), 0.U) 247 } 248 249 val needVecDest = Wire(Vec(RenameWidth, Bool())) 250 val needFpDest = Wire(Vec(RenameWidth, Bool())) 251 val needIntDest = Wire(Vec(RenameWidth, Bool())) 252 val needV0Dest = Wire(Vec(RenameWidth, Bool())) 253 val needVlDest = Wire(Vec(RenameWidth, Bool())) 254 private val inHeadValid = io.in.head.valid 255 256 val isMove = Wire(Vec(RenameWidth, Bool())) 257 isMove zip io.in.map(_.bits) foreach { 258 case (move, in) => move := Mux(in.exceptionVec.asUInt.orR, false.B, in.isMove) 259 } 260 261 val walkNeedIntDest = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 262 val walkNeedFpDest = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 263 val walkNeedVecDest = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 264 val walkNeedV0Dest = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 265 val walkNeedVlDest = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 266 val walkIsMove = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 267 268 val intSpecWen = Wire(Vec(RenameWidth, Bool())) 269 val fpSpecWen = Wire(Vec(RenameWidth, Bool())) 270 val vecSpecWen = Wire(Vec(RenameWidth, Bool())) 271 val v0SpecWen = Wire(Vec(RenameWidth, Bool())) 272 val vlSpecWen = Wire(Vec(RenameWidth, Bool())) 273 274 val walkIntSpecWen = WireDefault(VecInit(Seq.fill(RenameWidth)(false.B))) 275 276 val walkPdest = Wire(Vec(RenameWidth, UInt(PhyRegIdxWidth.W))) 277 278 // uop calculation 279 for (i <- 0 until RenameWidth) { 280 (uops(i): Data).waiveAll :<= (io.in(i).bits: Data).waiveAll 281 282 // read only CSRR instruction support: remove blockBackward and waitForward 283 inst(i) := uops(i).instr.asTypeOf(new XSInstBitFields) 284 isCsr(i) := inst(i).OPCODE5Bit === OPCODE5Bit.SYSTEM && inst(i).FUNCT3(1, 0) =/= 0.U 285 isCsrr(i) := isCsr(i) && inst(i).FUNCT3 === BitPat("b?1?") && inst(i).RS1 === 0.U 286 isWaitForwardCsrr(i) := isCsrr(i) && LookupTreeDefault( 287 inst(i).CSRIDX, true.B, CSROoORead.waitForwardInOrderCsrReadList.map(_.U -> false.B)) 288 isBlockBackwardCsrr(i) := isCsrr(i) && LookupTreeDefault( 289 inst(i).CSRIDX, true.B, CSROoORead.blockBackwardInOrderCsrReadList.map(_.U -> false.B)) 290 291 /* 292 * For most CSRs, CSRR instructions do not need to wait forward instructions. 293 * 294 * For most CSRs, CSRR instructions do not need to block backward instructions. 295 * 296 * Signal "isCsrr" contains not only "CSRR", but also other CSR instructions that do not require writing to CSR. 297 */ 298 uops(i).waitForward := io.in(i).bits.waitForward && !isWaitForwardCsrr(i) 299 uops(i).blockBackward := io.in(i).bits.blockBackward && !isBlockBackwardCsrr(i) 300 301 // update cf according to ssit result 302 uops(i).storeSetHit := io.ssit(i).valid 303 uops(i).loadWaitStrict := io.ssit(i).strict && io.ssit(i).valid 304 uops(i).ssid := io.ssit(i).ssid 305 306 // update cf according to waittable result 307 uops(i).loadWaitBit := io.waittable(i) 308 309 uops(i).replayInst := false.B // set by IQ or MemQ 310 // alloc a new phy reg 311 needV0Dest(i) := io.in(i).valid && needDestReg(Reg_V0, io.in(i).bits) 312 needVlDest(i) := io.in(i).valid && needDestReg(Reg_Vl, io.in(i).bits) 313 needVecDest(i) := io.in(i).valid && needDestReg(Reg_V, io.in(i).bits) 314 needFpDest(i) := io.in(i).valid && needDestReg(Reg_F, io.in(i).bits) 315 needIntDest(i) := io.in(i).valid && needDestReg(Reg_I, io.in(i).bits) 316 if (i < RabCommitWidth) { 317 walkNeedIntDest(i) := io.rabCommits.walkValid(i) && needDestRegWalk(Reg_I, io.rabCommits.info(i)) 318 walkNeedFpDest(i) := io.rabCommits.walkValid(i) && needDestRegWalk(Reg_F, io.rabCommits.info(i)) 319 walkNeedVecDest(i) := io.rabCommits.walkValid(i) && needDestRegWalk(Reg_V, io.rabCommits.info(i)) 320 walkNeedV0Dest(i) := io.rabCommits.walkValid(i) && needDestRegWalk(Reg_V0, io.rabCommits.info(i)) 321 walkNeedVlDest(i) := io.rabCommits.walkValid(i) && needDestRegWalk(Reg_Vl, io.rabCommits.info(i)) 322 walkIsMove(i) := io.rabCommits.info(i).isMove 323 } 324 fpFreeList.io.allocateReq(i) := needFpDest(i) 325 fpFreeList.io.walkReq(i) := walkNeedFpDest(i) 326 vecFreeList.io.allocateReq(i) := needVecDest(i) 327 vecFreeList.io.walkReq(i) := walkNeedVecDest(i) 328 v0FreeList.io.allocateReq(i) := needV0Dest(i) 329 v0FreeList.io.walkReq(i) := walkNeedV0Dest(i) 330 vlFreeList.io.allocateReq(i) := needVlDest(i) 331 vlFreeList.io.walkReq(i) := walkNeedVlDest(i) 332 intFreeList.io.allocateReq(i) := needIntDest(i) && !isMove(i) 333 intFreeList.io.walkReq(i) := walkNeedIntDest(i) && !walkIsMove(i) 334 335 // no valid instruction from decode stage || all resources (dispatch1 + both free lists) ready 336 io.in(i).ready := !io.in(0).valid || canOut 337 338 uops(i).robIdx := robIdxHead + PopCount(io.in.zip(needRobFlags).take(i).map{ case(in, needRobFlag) => in.valid && in.bits.lastUop && needRobFlag}) 339 uops(i).instrSize := instrSizesVec(i) 340 val hasExceptionExceptFlushPipe = Cat(selectFrontend(uops(i).exceptionVec) :+ uops(i).exceptionVec(illegalInstr) :+ uops(i).exceptionVec(virtualInstr)).orR || TriggerAction.isDmode(uops(i).trigger) 341 when(isMove(i) || hasExceptionExceptFlushPipe) { 342 uops(i).numUops := 0.U 343 uops(i).numWB := 0.U 344 } 345 if (i > 0) { 346 when(!needRobFlags(i - 1)) { 347 uops(i).firstUop := false.B 348 uops(i).ftqPtr := uops(i - 1).ftqPtr 349 uops(i).ftqOffset := uops(i - 1).ftqOffset 350 uops(i).numUops := instrSizesVec(i) - PopCount(compressMasksVec(i) & Cat(isMove.reverse)) 351 uops(i).numWB := instrSizesVec(i) - PopCount(compressMasksVec(i) & Cat(isMove.reverse)) 352 } 353 } 354 when(!needRobFlags(i)) { 355 uops(i).lastUop := false.B 356 uops(i).numUops := instrSizesVec(i) - PopCount(compressMasksVec(i) & Cat(isMove.reverse)) 357 uops(i).numWB := instrSizesVec(i) - PopCount(compressMasksVec(i) & Cat(isMove.reverse)) 358 } 359 uops(i).wfflags := (compressMasksVec(i) & Cat(io.in.map(_.bits.wfflags).reverse)).orR 360 uops(i).dirtyFs := (compressMasksVec(i) & Cat(io.in.map(_.bits.fpWen).reverse)).orR 361 uops(i).dirtyVs := ( 362 compressMasksVec(i) & Cat(io.in.map(in => 363 // vector instructions' uopSplitType cannot be UopSplitType.SCA_SIM 364 in.bits.uopSplitType =/= UopSplitType.SCA_SIM && 365 !UopSplitType.isAMOCAS(in.bits.uopSplitType) && 366 // vfmv.f.s, vcpop.m, vfirst.m and vmv.x.s don't change vector state 367 !Seq( 368 (FuType.vfalu, VfaluType.vfmv_f_s), // vfmv.f.s 369 (FuType.vipu, VipuType.vcpop_m), // vcpop.m 370 (FuType.vipu, VipuType.vfirst_m), // vfirst.m 371 (FuType.vipu, VipuType.vmv_x_s) // vmv.x.s 372 ).map(x => FuTypeOrR(in.bits.fuType, x._1) && in.bits.fuOpType === x._2).reduce(_ || _) 373 ).reverse) 374 ).orR 375 // psrc0,psrc1,psrc2 don't require v0ReadPorts because their srcType can distinguish whether they are V0 or not 376 uops(i).psrc(0) := Mux1H(uops(i).srcType(0)(2, 0), Seq(io.intReadPorts(i)(0), io.fpReadPorts(i)(0), io.vecReadPorts(i)(0))) 377 uops(i).psrc(1) := Mux1H(uops(i).srcType(1)(2, 0), Seq(io.intReadPorts(i)(1), io.fpReadPorts(i)(1), io.vecReadPorts(i)(1))) 378 uops(i).psrc(2) := Mux1H(uops(i).srcType(2)(2, 1), Seq(io.fpReadPorts(i)(2), io.vecReadPorts(i)(2))) 379 uops(i).psrc(3) := io.v0ReadPorts(i)(0) 380 uops(i).psrc(4) := io.vlReadPorts(i)(0) 381 382 // int psrc2 should be bypassed from next instruction if it is fused 383 if (i < RenameWidth - 1) { 384 when (io.fusionInfo(i).rs2FromRs2 || io.fusionInfo(i).rs2FromRs1) { 385 uops(i).psrc(1) := Mux(io.fusionInfo(i).rs2FromRs2, io.intReadPorts(i + 1)(1), io.intReadPorts(i + 1)(0)) 386 }.elsewhen(io.fusionInfo(i).rs2FromZero) { 387 uops(i).psrc(1) := 0.U 388 } 389 } 390 uops(i).eliminatedMove := isMove(i) 391 392 // update pdest 393 uops(i).pdest := MuxCase(0.U, Seq( 394 needIntDest(i) -> intFreeList.io.allocatePhyReg(i), 395 needFpDest(i) -> fpFreeList.io.allocatePhyReg(i), 396 needVecDest(i) -> vecFreeList.io.allocatePhyReg(i), 397 needV0Dest(i) -> v0FreeList.io.allocatePhyReg(i), 398 needVlDest(i) -> vlFreeList.io.allocatePhyReg(i), 399 )) 400 401 // Assign performance counters 402 uops(i).debugInfo.renameTime := GTimer() 403 404 io.out(i).valid := io.in(i).valid && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !io.rabCommits.isWalk 405 io.out(i).bits := uops(i) 406 // dirty code 407 if (i == 0) { 408 io.out(i).bits.psrc(0) := Mux(io.out(i).bits.isLUI, 0.U, uops(i).psrc(0)) 409 } 410 // Todo: move these shit in decode stage 411 // dirty code for fence. The lsrc is passed by imm. 412 when (io.out(i).bits.fuType === FuType.fence.U) { 413 io.out(i).bits.imm := Cat(io.in(i).bits.lsrc(1), io.in(i).bits.lsrc(0)) 414 } 415 416 // dirty code for SoftPrefetch (prefetch.r/prefetch.w) 417// when (io.in(i).bits.isSoftPrefetch) { 418// io.out(i).bits.fuType := FuType.ldu.U 419// io.out(i).bits.fuOpType := Mux(io.in(i).bits.lsrc(1) === 1.U, LSUOpType.prefetch_r, LSUOpType.prefetch_w) 420// io.out(i).bits.selImm := SelImm.IMM_S 421// io.out(i).bits.imm := Cat(io.in(i).bits.imm(io.in(i).bits.imm.getWidth - 1, 5), 0.U(5.W)) 422// } 423 424 // dirty code for lui+addi(w) fusion 425 if (i < RenameWidth - 1) { 426 val fused_lui32 = io.in(i).bits.selImm === SelImm.IMM_LUI32 && io.in(i).bits.fuType === FuType.alu.U 427 when (fused_lui32) { 428 val lui_imm = io.in(i).bits.imm(19, 0) 429 val add_imm = io.in(i + 1).bits.imm(11, 0) 430 require(io.out(i).bits.imm.getWidth >= lui_imm.getWidth + add_imm.getWidth) 431 io.out(i).bits.imm := Cat(lui_imm, add_imm) 432 } 433 } 434 435 // write speculative rename table 436 // we update rat later inside commit code 437 intSpecWen(i) := needIntDest(i) && intFreeList.io.canAllocate && intFreeList.io.doAllocate && !io.rabCommits.isWalk && !io.redirect.valid 438 fpSpecWen(i) := needFpDest(i) && fpFreeList.io.canAllocate && fpFreeList.io.doAllocate && !io.rabCommits.isWalk && !io.redirect.valid 439 vecSpecWen(i) := needVecDest(i) && vecFreeList.io.canAllocate && vecFreeList.io.doAllocate && !io.rabCommits.isWalk && !io.redirect.valid 440 v0SpecWen(i) := needV0Dest(i) && v0FreeList.io.canAllocate && v0FreeList.io.doAllocate && !io.rabCommits.isWalk && !io.redirect.valid 441 vlSpecWen(i) := needVlDest(i) && vlFreeList.io.canAllocate && vlFreeList.io.doAllocate && !io.rabCommits.isWalk && !io.redirect.valid 442 443 444 if (i < RabCommitWidth) { 445 walkIntSpecWen(i) := walkNeedIntDest(i) && !io.redirect.valid 446 walkPdest(i) := io.rabCommits.info(i).pdest 447 } else { 448 walkPdest(i) := io.out(i).bits.pdest 449 } 450 } 451 452 /** 453 * trace begin 454 */ 455 // note: fusionInst can't robcompress 456 val inVec = io.in.map(_.bits) 457 val isRVCVec = inVec.map(_.preDecodeInfo.isRVC) 458 val isFusionVec = inVec.map(_.commitType).map(ctype => CommitType.isFused(ctype)) 459 460 val canRobCompressVec = compressUnit.io.out.canCompressVec 461 val iLastSizeVec = isRVCVec.map(isRVC => Mux(isRVC, Ilastsize.HalfWord, Ilastsize.Word)) 462 val halfWordNumVec = isRVCVec.map(isRVC => Mux(isRVC, 1.U, 2.U)) 463 val halfWordNumMatrix = (0 until RenameWidth).map( 464 i => compressMasksVec(i).asBools.zipWithIndex.map{ case(mask, j) => 465 Mux(mask, halfWordNumVec(j), 0.U) 466 } 467 ) 468 469 for (i <- 0 until RenameWidth) { 470 // iretire 471 uops(i).traceBlockInPipe.iretire := Mux(canRobCompressVec(i), 472 halfWordNumMatrix(i).reduce(_ +& _), 473 (if(i < RenameWidth -1) Mux(isFusionVec(i), halfWordNumVec(i+1), 0.U) else 0.U) +& halfWordNumVec(i) 474 ) 475 476 // ilastsize 477 val tmp = i 478 val lastIsRVC = WireInit(false.B) 479 (tmp until RenameWidth).map { j => 480 when(compressMasksVec(i)(j)) { 481 lastIsRVC := io.in(j).bits.preDecodeInfo.isRVC 482 } 483 } 484 uops(i).traceBlockInPipe.ilastsize := Mux(canRobCompressVec(i), 485 Mux(lastIsRVC, Ilastsize.HalfWord, Ilastsize.Word), 486 (if(i < RenameWidth -1) Mux(isFusionVec(i), iLastSizeVec(i+1), iLastSizeVec(i)) else iLastSizeVec(i)) 487 ) 488 489 // itype 490 uops(i).traceBlockInPipe.itype := Itype.jumpTypeGen(inVec(i).preDecodeInfo.brType, inVec(i).ldest.asTypeOf(new OpRegType), inVec(i).lsrc(0).asTypeOf((new OpRegType))) 491 } 492 /** 493 * trace end 494 */ 495 496 /** 497 * How to set psrc: 498 * - bypass the pdest to psrc if previous instructions write to the same ldest as lsrc 499 * - default: psrc from RAT 500 * How to set pdest: 501 * - Mux(isMove, psrc, pdest_from_freelist). 502 * 503 * The critical path of rename lies here: 504 * When move elimination is enabled, we need to update the rat with psrc. 505 * However, psrc maybe comes from previous instructions' pdest, which comes from freelist. 506 * 507 * If we expand these logic for pdest(N): 508 * pdest(N) = Mux(isMove(N), psrc(N), freelist_out(N)) 509 * = Mux(isMove(N), Mux(bypass(N, N - 1), pdest(N - 1), 510 * Mux(bypass(N, N - 2), pdest(N - 2), 511 * ... 512 * Mux(bypass(N, 0), pdest(0), 513 * rat_out(N))...)), 514 * freelist_out(N)) 515 */ 516 // a simple functional model for now 517 io.out(0).bits.pdest := Mux(isMove(0), uops(0).psrc.head, uops(0).pdest) 518 519 // psrc(n) + pdest(1) 520 val bypassCond: Vec[MixedVec[UInt]] = Wire(Vec(numRegSrc, MixedVec(List.tabulate(RenameWidth-1)(i => UInt((i+1).W))))) 521 require(io.in(0).bits.srcType.size == io.in(0).bits.numSrc) 522 private val pdestLoc = io.in.head.bits.srcType.size // 2 vector src: v0, vl&vtype 523 println(s"[Rename] idx of pdest in bypassCond $pdestLoc") 524 for (i <- 1 until RenameWidth) { 525 val v0Cond = io.in(i).bits.srcType.zipWithIndex.map{ case (s, i) => 526 if (i == 3) (s === SrcType.vp) || (s === SrcType.v0) 527 else false.B 528 } 529 val vlCond = io.in(i).bits.srcType.zipWithIndex.map{ case (s, i) => 530 if (i == 4) s === SrcType.vp 531 else false.B 532 } 533 val vecCond = io.in(i).bits.srcType.map(_ === SrcType.vp) 534 val fpCond = io.in(i).bits.srcType.map(_ === SrcType.fp) 535 val intCond = io.in(i).bits.srcType.map(_ === SrcType.xp) 536 val target = io.in(i).bits.lsrc 537 for ((((((cond1, (condV0, condVl)), cond2), cond3), t), j) <- vecCond.zip(v0Cond.zip(vlCond)).zip(fpCond).zip(intCond).zip(target).zipWithIndex) { 538 val destToSrc = io.in.take(i).zipWithIndex.map { case (in, j) => 539 val indexMatch = in.bits.ldest === t 540 val writeMatch = cond3 && needIntDest(j) || cond2 && needFpDest(j) || cond1 && needVecDest(j) 541 val v0vlMatch = condV0 && needV0Dest(j) || condVl && needVlDest(j) 542 indexMatch && writeMatch || v0vlMatch 543 } 544 bypassCond(j)(i - 1) := VecInit(destToSrc).asUInt 545 } 546 // For the LUI instruction: psrc(0) is from register file and should always be zero. 547 io.out(i).bits.psrc(0) := Mux(io.out(i).bits.isLUI, 0.U, io.out.take(i).map(_.bits.pdest).zip(bypassCond(0)(i-1).asBools).foldLeft(uops(i).psrc(0)) { 548 (z, next) => Mux(next._2, next._1, z) 549 }) 550 io.out(i).bits.psrc(1) := io.out.take(i).map(_.bits.pdest).zip(bypassCond(1)(i-1).asBools).foldLeft(uops(i).psrc(1)) { 551 (z, next) => Mux(next._2, next._1, z) 552 } 553 io.out(i).bits.psrc(2) := io.out.take(i).map(_.bits.pdest).zip(bypassCond(2)(i-1).asBools).foldLeft(uops(i).psrc(2)) { 554 (z, next) => Mux(next._2, next._1, z) 555 } 556 io.out(i).bits.psrc(3) := io.out.take(i).map(_.bits.pdest).zip(bypassCond(3)(i-1).asBools).foldLeft(uops(i).psrc(3)) { 557 (z, next) => Mux(next._2, next._1, z) 558 } 559 io.out(i).bits.psrc(4) := io.out.take(i).map(_.bits.pdest).zip(bypassCond(4)(i-1).asBools).foldLeft(uops(i).psrc(4)) { 560 (z, next) => Mux(next._2, next._1, z) 561 } 562 io.out(i).bits.pdest := Mux(isMove(i), io.out(i).bits.psrc(0), uops(i).pdest) 563 564 // Todo: better implementation for fields reuse 565 // For fused-lui-load, load.src(0) is replaced by the imm. 566 val last_is_lui = io.in(i - 1).bits.selImm === SelImm.IMM_U && io.in(i - 1).bits.srcType(0) =/= SrcType.pc 567 val this_is_load = io.in(i).bits.fuType === FuType.ldu.U 568 val lui_to_load = io.in(i - 1).valid && io.in(i - 1).bits.rfWen && io.in(i - 1).bits.ldest === io.in(i).bits.lsrc(0) 569 val fused_lui_load = last_is_lui && this_is_load && lui_to_load 570 when (fused_lui_load) { 571 // The first LOAD operand (base address) is replaced by LUI-imm and stored in imm 572 val lui_imm = io.in(i - 1).bits.imm(ImmUnion.U.len - 1, 0) 573 val ld_imm = io.in(i).bits.imm(ImmUnion.I.len - 1, 0) 574 require(io.out(i).bits.imm.getWidth >= lui_imm.getWidth + ld_imm.getWidth) 575 io.out(i).bits.srcType(0) := SrcType.imm 576 io.out(i).bits.imm := Cat(lui_imm, ld_imm) 577 } 578 579 } 580 581 val genSnapshot = Cat(io.out.map(out => out.fire && out.bits.snapshot)).orR 582 val lastCycleCreateSnpt = RegInit(false.B) 583 lastCycleCreateSnpt := genSnapshot && !io.snptIsFull 584 val sameSnptDistance = (RobCommitWidth * 4).U 585 // notInSameSnpt: 1.robidxHead - snapLastEnq >= sameSnptDistance 2.no snap 586 val notInSameSnpt = GatedValidRegNext(distanceBetween(robIdxHeadNext, io.snptLastEnq.bits) >= sameSnptDistance || !io.snptLastEnq.valid) 587 val allowSnpt = if (EnableRenameSnapshot) notInSameSnpt && !lastCycleCreateSnpt && io.in.head.bits.firstUop else false.B 588 io.out.zip(io.in).foreach{ case (out, in) => out.bits.snapshot := allowSnpt && (!in.bits.preDecodeInfo.notCFI || FuType.isJump(in.bits.fuType)) && in.fire } 589 io.out.map{ x => 590 x.bits.hasException := Cat(selectFrontend(x.bits.exceptionVec) :+ x.bits.exceptionVec(illegalInstr) :+ x.bits.exceptionVec(virtualInstr)).orR || TriggerAction.isDmode(x.bits.trigger) 591 } 592 if(backendParams.debugEn){ 593 dontTouch(robIdxHeadNext) 594 dontTouch(notInSameSnpt) 595 dontTouch(genSnapshot) 596 } 597 intFreeList.io.snpt := io.snpt 598 fpFreeList.io.snpt := io.snpt 599 vecFreeList.io.snpt := io.snpt 600 v0FreeList.io.snpt := io.snpt 601 vlFreeList.io.snpt := io.snpt 602 intFreeList.io.snpt.snptEnq := genSnapshot 603 fpFreeList.io.snpt.snptEnq := genSnapshot 604 vecFreeList.io.snpt.snptEnq := genSnapshot 605 v0FreeList.io.snpt.snptEnq := genSnapshot 606 vlFreeList.io.snpt.snptEnq := genSnapshot 607 608 /** 609 * Instructions commit: update freelist and rename table 610 */ 611 for (i <- 0 until RabCommitWidth) { 612 val commitValid = io.rabCommits.isCommit && io.rabCommits.commitValid(i) 613 val walkValid = io.rabCommits.isWalk && io.rabCommits.walkValid(i) 614 615 // I. RAT Update 616 // When redirect happens (mis-prediction), don't update the rename table 617 io.intRenamePorts(i).wen := intSpecWen(i) 618 io.intRenamePorts(i).addr := uops(i).ldest(log2Ceil(IntLogicRegs) - 1, 0) 619 io.intRenamePorts(i).data := io.out(i).bits.pdest 620 621 io.fpRenamePorts(i).wen := fpSpecWen(i) 622 io.fpRenamePorts(i).addr := uops(i).ldest(log2Ceil(FpLogicRegs) - 1, 0) 623 io.fpRenamePorts(i).data := fpFreeList.io.allocatePhyReg(i) 624 625 io.vecRenamePorts(i).wen := vecSpecWen(i) 626 io.vecRenamePorts(i).addr := uops(i).ldest(log2Ceil(VecLogicRegs) - 1, 0) 627 io.vecRenamePorts(i).data := vecFreeList.io.allocatePhyReg(i) 628 629 io.v0RenamePorts(i).wen := v0SpecWen(i) 630 io.v0RenamePorts(i).addr := uops(i).ldest(log2Ceil(V0LogicRegs) - 1, 0) 631 io.v0RenamePorts(i).data := v0FreeList.io.allocatePhyReg(i) 632 633 io.vlRenamePorts(i).wen := vlSpecWen(i) 634 io.vlRenamePorts(i).addr := uops(i).ldest(log2Ceil(VlLogicRegs) - 1, 0) 635 io.vlRenamePorts(i).data := vlFreeList.io.allocatePhyReg(i) 636 637 // II. Free List Update 638 intFreeList.io.freeReq(i) := io.int_need_free(i) 639 intFreeList.io.freePhyReg(i) := RegNext(io.int_old_pdest(i)) 640 fpFreeList.io.freeReq(i) := GatedValidRegNext(commitValid && needDestRegCommit(Reg_F, io.rabCommits.info(i))) 641 fpFreeList.io.freePhyReg(i) := io.fp_old_pdest(i) 642 vecFreeList.io.freeReq(i) := GatedValidRegNext(commitValid && needDestRegCommit(Reg_V, io.rabCommits.info(i))) 643 vecFreeList.io.freePhyReg(i) := io.vec_old_pdest(i) 644 v0FreeList.io.freeReq(i) := GatedValidRegNext(commitValid && needDestRegCommit(Reg_V0, io.rabCommits.info(i))) 645 v0FreeList.io.freePhyReg(i) := io.v0_old_pdest(i) 646 vlFreeList.io.freeReq(i) := GatedValidRegNext(commitValid && needDestRegCommit(Reg_Vl, io.rabCommits.info(i))) 647 vlFreeList.io.freePhyReg(i) := io.vl_old_pdest(i) 648 } 649 650 /* 651 Debug and performance counters 652 */ 653 def printRenameInfo(in: DecoupledIO[DecodedInst], out: DecoupledIO[DynInst]) = { 654 XSInfo(out.fire, p"pc:${Hexadecimal(in.bits.pc)} in(${in.valid},${in.ready}) " + 655 p"lsrc(0):${in.bits.lsrc(0)} -> psrc(0):${out.bits.psrc(0)} " + 656 p"lsrc(1):${in.bits.lsrc(1)} -> psrc(1):${out.bits.psrc(1)} " + 657 p"lsrc(2):${in.bits.lsrc(2)} -> psrc(2):${out.bits.psrc(2)} " + 658 p"ldest:${in.bits.ldest} -> pdest:${out.bits.pdest}\n" 659 ) 660 } 661 662 for ((x,y) <- io.in.zip(io.out)) { 663 printRenameInfo(x, y) 664 } 665 666 io.out.map { case x => 667 when(x.valid && x.bits.rfWen){ 668 assert(x.bits.ldest =/= 0.U, "rfWen cannot be 1 when Int regfile ldest is 0") 669 } 670 } 671 val debugRedirect = RegEnable(io.redirect.bits, io.redirect.valid) 672 // bad speculation 673 val recStall = io.redirect.valid || io.rabCommits.isWalk 674 val ctrlRecStall = Mux(io.redirect.valid, io.redirect.bits.debugIsCtrl, io.rabCommits.isWalk && debugRedirect.debugIsCtrl) 675 val mvioRecStall = Mux(io.redirect.valid, io.redirect.bits.debugIsMemVio, io.rabCommits.isWalk && debugRedirect.debugIsMemVio) 676 val otherRecStall = recStall && !(ctrlRecStall || mvioRecStall) 677 XSPerfAccumulate("recovery_stall", recStall) 678 XSPerfAccumulate("control_recovery_stall", ctrlRecStall) 679 XSPerfAccumulate("mem_violation_recovery_stall", mvioRecStall) 680 XSPerfAccumulate("other_recovery_stall", otherRecStall) 681 // freelist stall 682 val notRecStall = !io.out.head.valid && !recStall 683 val intFlStall = notRecStall && inHeadValid && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !intFreeList.io.canAllocate 684 val fpFlStall = notRecStall && inHeadValid && intFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !fpFreeList.io.canAllocate 685 val vecFlStall = notRecStall && inHeadValid && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !vecFreeList.io.canAllocate 686 val v0FlStall = notRecStall && inHeadValid && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && vlFreeList.io.canAllocate && !v0FreeList.io.canAllocate 687 val vlFlStall = notRecStall && inHeadValid && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && !vlFreeList.io.canAllocate 688 val multiFlStall = notRecStall && inHeadValid && (PopCount(Cat( 689 !intFreeList.io.canAllocate, 690 !fpFreeList.io.canAllocate, 691 !vecFreeList.io.canAllocate, 692 !v0FreeList.io.canAllocate, 693 !vlFreeList.io.canAllocate, 694 )) > 1.U) 695 // other stall 696 val otherStall = notRecStall && !intFlStall && !fpFlStall && !vecFlStall && !v0FlStall && !vlFlStall && !multiFlStall 697 698 io.stallReason.in.backReason.valid := io.stallReason.out.backReason.valid || !io.in.head.ready 699 io.stallReason.in.backReason.bits := Mux(io.stallReason.out.backReason.valid, io.stallReason.out.backReason.bits, 700 MuxCase(TopDownCounters.OtherCoreStall.id.U, Seq( 701 ctrlRecStall -> TopDownCounters.ControlRecoveryStall.id.U, 702 mvioRecStall -> TopDownCounters.MemVioRecoveryStall.id.U, 703 otherRecStall -> TopDownCounters.OtherRecoveryStall.id.U, 704 intFlStall -> TopDownCounters.IntFlStall.id.U, 705 fpFlStall -> TopDownCounters.FpFlStall.id.U, 706 vecFlStall -> TopDownCounters.VecFlStall.id.U, 707 v0FlStall -> TopDownCounters.V0FlStall.id.U, 708 vlFlStall -> TopDownCounters.VlFlStall.id.U, 709 multiFlStall -> TopDownCounters.MultiFlStall.id.U, 710 ) 711 )) 712 io.stallReason.out.reason.zip(io.stallReason.in.reason).zip(io.in.map(_.valid)).foreach { case ((out, in), valid) => 713 out := Mux(io.stallReason.in.backReason.valid, io.stallReason.in.backReason.bits, in) 714 } 715 716 XSDebug(io.rabCommits.isWalk, p"Walk Recovery Enabled\n") 717 XSDebug(io.rabCommits.isWalk, p"validVec:${Binary(io.rabCommits.walkValid.asUInt)}\n") 718 for (i <- 0 until RabCommitWidth) { 719 val info = io.rabCommits.info(i) 720 XSDebug(io.rabCommits.isWalk && io.rabCommits.walkValid(i), p"[#$i walk info] " + 721 p"ldest:${info.ldest} rfWen:${info.rfWen} fpWen:${info.fpWen} vecWen:${info.vecWen} v0Wen:${info.v0Wen} vlWen:${info.vlWen}") 722 } 723 724 XSDebug(p"inValidVec: ${Binary(Cat(io.in.map(_.valid)))}\n") 725 726 XSPerfAccumulate("in_valid_count", PopCount(io.in.map(_.valid))) 727 XSPerfAccumulate("in_fire_count", PopCount(io.in.map(_.fire))) 728 XSPerfAccumulate("in_valid_not_ready_count", PopCount(io.in.map(x => x.valid && !x.ready))) 729 XSPerfAccumulate("wait_cycle", !io.in.head.valid && dispatchCanAcc) 730 731 // These stall reasons could overlap each other, but we configure the priority as fellows. 732 // walk stall > dispatch stall > int freelist stall > fp freelist stall 733 private val inHeadStall = io.in.head match { case x => x.valid && !x.ready } 734 private val stallForWalk = inHeadValid && io.rabCommits.isWalk 735 private val stallForDispatch = inHeadValid && !io.rabCommits.isWalk && !dispatchCanAcc 736 private val stallForIntFL = inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !intFreeList.io.canAllocate 737 private val stallForFpFL = inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !fpFreeList.io.canAllocate 738 private val stallForVecFL = inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !vecFreeList.io.canAllocate 739 private val stallForV0FL = inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && vlFreeList.io.canAllocate && !v0FreeList.io.canAllocate 740 private val stallForVlFL = inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && !vlFreeList.io.canAllocate 741 XSPerfAccumulate("stall_cycle", inHeadStall) 742 XSPerfAccumulate("stall_cycle_walk", stallForWalk) 743 XSPerfAccumulate("stall_cycle_dispatch", stallForDispatch) 744 XSPerfAccumulate("stall_cycle_int", stallForIntFL) 745 XSPerfAccumulate("stall_cycle_fp", stallForFpFL) 746 XSPerfAccumulate("stall_cycle_vec", stallForVecFL) 747 XSPerfAccumulate("stall_cycle_vec", stallForV0FL) 748 XSPerfAccumulate("stall_cycle_vec", stallForVlFL) 749 750 XSPerfHistogram("in_valid_range", PopCount(io.in.map(_.valid)), true.B, 0, DecodeWidth + 1, 1) 751 XSPerfHistogram("in_fire_range", PopCount(io.in.map(_.fire)), true.B, 0, DecodeWidth + 1, 1) 752 XSPerfHistogram("out_valid_range", PopCount(io.out.map(_.valid)), true.B, 0, DecodeWidth + 1, 1) 753 XSPerfHistogram("out_fire_range", PopCount(io.out.map(_.fire)), true.B, 0, DecodeWidth + 1, 1) 754 755 XSPerfAccumulate("move_instr_count", PopCount(io.out.map(out => out.fire && out.bits.isMove))) 756 val is_fused_lui_load = io.out.map(o => o.fire && o.bits.fuType === FuType.ldu.U && o.bits.srcType(0) === SrcType.imm) 757 XSPerfAccumulate("fused_lui_load_instr_count", PopCount(is_fused_lui_load)) 758 759 val renamePerf = Seq( 760 ("rename_in ", PopCount(io.in.map(_.valid & io.in(0).ready ))), 761 ("rename_waitinstr ", PopCount((0 until RenameWidth).map(i => io.in(i).valid && !io.in(i).ready))), 762 ("rename_stall ", inHeadStall), 763 ("rename_stall_cycle_walk ", inHeadValid && io.rabCommits.isWalk), 764 ("rename_stall_cycle_dispatch", inHeadValid && !io.rabCommits.isWalk && !dispatchCanAcc), 765 ("rename_stall_cycle_int ", inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !intFreeList.io.canAllocate), 766 ("rename_stall_cycle_fp ", inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !fpFreeList.io.canAllocate), 767 ("rename_stall_cycle_vec ", inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && v0FreeList.io.canAllocate && vlFreeList.io.canAllocate && !vecFreeList.io.canAllocate), 768 ("rename_stall_cycle_v0 ", inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && vlFreeList.io.canAllocate && !v0FreeList.io.canAllocate), 769 ("rename_stall_cycle_vl ", inHeadValid && !io.rabCommits.isWalk && dispatchCanAcc && intFreeList.io.canAllocate && fpFreeList.io.canAllocate && vecFreeList.io.canAllocate && v0FreeList.io.canAllocate && !vlFreeList.io.canAllocate), 770 ) 771 val intFlPerf = intFreeList.getPerfEvents 772 val fpFlPerf = fpFreeList.getPerfEvents 773 val vecFlPerf = vecFreeList.getPerfEvents 774 val v0FlPerf = v0FreeList.getPerfEvents 775 val vlFlPerf = vlFreeList.getPerfEvents 776 val perfEvents = renamePerf ++ intFlPerf ++ fpFlPerf ++ vecFlPerf ++ v0FlPerf ++ vlFlPerf 777 generatePerfEvent() 778} 779