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 c.io.in.bits.ghist := io.in.bits.ghist 38 39 c.io.s0_fire := io.s0_fire 40 c.io.s1_fire := io.s1_fire 41 c.io.s2_fire := io.s2_fire 42 c.io.s3_fire := io.s3_fire 43 44 c.io.s2_redirect := io.s2_redirect 45 c.io.s3_redirect := io.s3_redirect 46 47 c.io.redirect := io.redirect 48 49 if (c.meta_size > 0) { 50 metas = (metas << c.meta_size) | c.io.out.last_stage_meta(c.meta_size-1,0) 51 } 52 meta_sz = meta_sz + c.meta_size 53 } 54 println(s"total meta size: $meta_sz\n\n") 55 56 io.in.ready := components.map(_.io.s1_ready).reduce(_ && _) 57 58 io.s1_ready := components.map(_.io.s1_ready).reduce(_ && _) 59 io.s2_ready := components.map(_.io.s2_ready).reduce(_ && _) 60 61 require(meta_sz < MaxMetaLength) 62 io.out.last_stage_meta := metas 63 64 var update_meta = io.update.bits.meta 65 for (c <- components.reverse) { 66 c.io.update := io.update 67 c.io.update.bits.meta := update_meta 68 update_meta = update_meta >> c.meta_size 69 } 70 71 def extractMeta(meta: UInt, idx: Int): UInt = { 72 var update_meta = meta 73 var metas: Seq[UInt] = Nil 74 for (c <- components.reverse) { 75 metas = metas :+ update_meta 76 update_meta = update_meta >> c.meta_size 77 } 78 metas(idx) 79 } 80 81 override def getFoldedHistoryInfo = Some(components.map(_.getFoldedHistoryInfo.getOrElse(Set())).reduce(_++_)) 82 83 override val perfEvents = components.map(_.getPerfEvents).reduce(_++_) 84 generatePerfEvent() 85} 86