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.frontend 18 19import chipsalliance.rocketchip.config.Parameters 20import chisel3._ 21import chisel3.util._ 22import chisel3.experimental.chiselName 23import xiangshan._ 24import utils._ 25 26@chiselName 27class Composer(implicit p: Parameters) extends BasePredictor with HasBPUConst with HasPerfEvents { 28 val (components, resp) = getBPDComponents(io.in.bits.resp_in(0), p) 29 io.out.resp := resp 30 31 var metas = 0.U(1.W) 32 var meta_sz = 0 33 for (c <- components) { 34 c.io.in.valid := io.in.valid 35 c.io.in.bits.s0_pc := io.in.bits.s0_pc 36 c.io.in.bits.folded_hist := io.in.bits.folded_hist 37 38 c.io.s0_fire := io.s0_fire 39 c.io.s1_fire := io.s1_fire 40 c.io.s2_fire := io.s2_fire 41 42 c.io.redirect := io.redirect 43 44 if (c.meta_size > 0) { 45 metas = (metas << c.meta_size) | c.io.out.last_stage_meta(c.meta_size-1,0) 46 } 47 meta_sz = meta_sz + c.meta_size 48 } 49 println(s"total meta size: $meta_sz\n\n") 50 51 io.in.ready := components.map(_.io.s1_ready).reduce(_ && _) 52 53 io.s1_ready := components.map(_.io.s1_ready).reduce(_ && _) 54 io.s2_ready := components.map(_.io.s2_ready).reduce(_ && _) 55 56 require(meta_sz < MaxMetaLength) 57 io.out.last_stage_meta := metas 58 59 var update_meta = io.update.bits.meta 60 for (c <- components.reverse) { 61 c.io.update := io.update 62 c.io.update.bits.meta := update_meta 63 update_meta = update_meta >> c.meta_size 64 } 65 66 def extractMeta(meta: UInt, idx: Int): UInt = { 67 var update_meta = meta 68 var metas: Seq[UInt] = Nil 69 for (c <- components.reverse) { 70 metas = metas :+ update_meta 71 update_meta = update_meta >> c.meta_size 72 } 73 metas(idx) 74 } 75 76 override def getFoldedHistoryInfo = Some(components.map(_.getFoldedHistoryInfo.getOrElse(Set())).reduce(_++_)) 77 78 val comp_1_perf = components(1).asInstanceOf[MicroBTB].getPerfEvents 79 val comp_2_perf = components(2).asInstanceOf[Tage_SC].getPerfEvents 80 val comp_3_perf = components(3).asInstanceOf[FTB].getPerfEvents 81 val perfEvents = comp_1_perf ++ comp_2_perf ++ comp_3_perf 82 generatePerfEvent() 83} 84