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.decode 18 19import chipsalliance.rocketchip.config.Parameters 20import chisel3._ 21import chisel3.util._ 22import freechips.rocketchip.rocket.Instructions._ 23import freechips.rocketchip.util.uintToBitPat 24import utility._ 25import utils._ 26import xiangshan.ExceptionNO.illegalInstr 27import xiangshan._ 28import xiangshan.backend.fu.FuType 29import xiangshan.backend.Bundles.{DecodedInst, DynInst, StaticInst} 30import xiangshan.backend.decode.isa.bitfield.{InstVType, XSInstBitFields} 31import xiangshan.backend.fu.vector.Bundles.{Category, VType} 32 33/** 34 * Abstract trait giving defaults and other relevant values to different Decode constants/ 35 */ 36abstract trait DecodeConstants { 37 // This X should be used only in 1-bit signal. Otherwise, use BitPat("b???") to align with the width of UInt. 38 def X = BitPat("b0") 39 def N = BitPat("b0") 40 def Y = BitPat("b1") 41 def T = true 42 def F = false 43 44 def decodeDefault: List[BitPat] = // illegal instruction 45 // srcType(0) srcType(1) srcType(2) fuType fuOpType rfWen 46 // | | | | | | fpWen 47 // | | | | | | | vecWen 48 // | | | | | | | | isXSTrap 49 // | | | | | | | | | noSpecExec 50 // | | | | | | | | | | blockBackward 51 // | | | | | | | | | | | flushPipe 52 // | | | | | | | | | | | | canRobCompress 53 // | | | | | | | | | | | | | uopSplitType 54 // | | | | | | | | | | | | | | selImm 55 List(SrcType.X, SrcType.X, SrcType.X, FuType.X, FuOpType.X, N, N, N, N, N, N, N, N, UopSplitType.X, SelImm.INVALID_INSTR) // Use SelImm to indicate invalid instr 56 57 val decodeArray: Array[(BitPat, XSDecodeBase)] 58 final def table: Array[(BitPat, List[BitPat])] = decodeArray.map(x => (x._1, x._2.generate())) 59} 60 61trait DecodeUnitConstants 62{ 63 // abstract out instruction decode magic numbers 64 val RD_MSB = 11 65 val RD_LSB = 7 66 val RS1_MSB = 19 67 val RS1_LSB = 15 68 val RS2_MSB = 24 69 val RS2_LSB = 20 70 val RS3_MSB = 31 71 val RS3_LSB = 27 72} 73 74/** 75 * Decoded control signals 76 * See xiangshan/package.scala, xiangshan/backend/package.scala, Bundle.scala 77 */ 78 79abstract class XSDecodeBase { 80 def X = BitPat("b?") 81 def N = BitPat("b0") 82 def Y = BitPat("b1") 83 def T = true 84 def F = false 85 def generate() : List[BitPat] 86} 87 88case class XSDecode( 89 src1: BitPat, src2: BitPat, src3: BitPat, 90 fu: FuType.OHType, fuOp: BitPat, selImm: BitPat, 91 uopSplitType: BitPat = UopSplitType.X, 92 xWen: Boolean = false, 93 fWen: Boolean = false, 94 vWen: Boolean = false, 95 mWen: Boolean = false, 96 xsTrap: Boolean = false, 97 noSpec: Boolean = false, 98 blockBack: Boolean = false, 99 flushPipe: Boolean = false, 100 canRobCompress: Boolean = false, 101) extends XSDecodeBase { 102 def generate() : List[BitPat] = { 103 List (src1, src2, src3, BitPat(fu.U(FuType.num.W)), fuOp, xWen.B, fWen.B, (vWen || mWen).B, xsTrap.B, noSpec.B, blockBack.B, flushPipe.B, canRobCompress.B, uopSplitType, selImm) 104 } 105} 106 107case class FDecode( 108 src1: BitPat, src2: BitPat, src3: BitPat, 109 fu: FuType.OHType, fuOp: BitPat, selImm: BitPat = SelImm.X, 110 uopSplitType: BitPat = UopSplitType.X, 111 xWen: Boolean = false, 112 fWen: Boolean = false, 113 vWen: Boolean = false, 114 mWen: Boolean = false, 115 xsTrap: Boolean = false, 116 noSpec: Boolean = false, 117 blockBack: Boolean = false, 118 flushPipe: Boolean = false, 119 canRobCompress: Boolean = false, 120) extends XSDecodeBase { 121 def generate() : List[BitPat] = { 122 XSDecode(src1, src2, src3, fu, fuOp, selImm, uopSplitType, xWen, fWen, vWen, mWen, xsTrap, noSpec, blockBack, flushPipe, canRobCompress).generate() 123 } 124} 125 126/** 127 * Decode constants for RV64 128 */ 129object X64Decode extends DecodeConstants { 130 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 131 LD -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.ld , SelImm.IMM_I, xWen = T), 132 LWU -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lwu , SelImm.IMM_I, xWen = T), 133 SD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.stu, LSUOpType.sd , SelImm.IMM_S ), 134 135 SLLI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.sll , SelImm.IMM_I, xWen = T, canRobCompress = T), 136 SRLI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.srl , SelImm.IMM_I, xWen = T, canRobCompress = T), 137 SRAI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.sra , SelImm.IMM_I, xWen = T, canRobCompress = T), 138 139 ADDIW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.addw, SelImm.IMM_I, xWen = T, canRobCompress = T), 140 SLLIW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.sllw, SelImm.IMM_I, xWen = T, canRobCompress = T), 141 SRAIW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.sraw, SelImm.IMM_I, xWen = T, canRobCompress = T), 142 SRLIW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.srlw, SelImm.IMM_I, xWen = T, canRobCompress = T), 143 144 ADDW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.addw, SelImm.X , xWen = T, canRobCompress = T), 145 SUBW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.subw, SelImm.X , xWen = T, canRobCompress = T), 146 SLLW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sllw, SelImm.X , xWen = T, canRobCompress = T), 147 SRAW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sraw, SelImm.X , xWen = T, canRobCompress = T), 148 SRLW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.srlw, SelImm.X , xWen = T, canRobCompress = T), 149 150 RORW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.rorw, SelImm.X , xWen = T, canRobCompress = T), 151 RORIW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.rorw, SelImm.IMM_I, xWen = T, canRobCompress = T), 152 ROLW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.rolw, SelImm.X , xWen = T, canRobCompress = T), 153 ) 154} 155 156/** 157 * Overall Decode constants 158 */ 159object XDecode extends DecodeConstants { 160 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 161 LW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lw , SelImm.IMM_I, xWen = T), 162 LH -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lh , SelImm.IMM_I, xWen = T), 163 LHU -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lhu , SelImm.IMM_I, xWen = T), 164 LB -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lb , SelImm.IMM_I, xWen = T), 165 LBU -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lbu , SelImm.IMM_I, xWen = T), 166 SW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.stu, LSUOpType.sw , SelImm.IMM_S ), 167 SH -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.stu, LSUOpType.sh , SelImm.IMM_S ), 168 SB -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.stu, LSUOpType.sb , SelImm.IMM_S ), 169 LUI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.add , SelImm.IMM_U, xWen = T, canRobCompress = T), 170 ADDI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.add , SelImm.IMM_I, xWen = T, canRobCompress = T), 171 ANDI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.and , SelImm.IMM_I, xWen = T, canRobCompress = T), 172 ORI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.or , SelImm.IMM_I, xWen = T, canRobCompress = T), 173 XORI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.xor , SelImm.IMM_I, xWen = T, canRobCompress = T), 174 SLTI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.slt , SelImm.IMM_I, xWen = T, canRobCompress = T), 175 SLTIU -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.sltu, SelImm.IMM_I, xWen = T, canRobCompress = T), 176 SLL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sll , SelImm.X , xWen = T, canRobCompress = T), 177 ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.add , SelImm.X , xWen = T, canRobCompress = T), 178 SUB -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sub , SelImm.X , xWen = T, canRobCompress = T), 179 SLT -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.slt , SelImm.X , xWen = T, canRobCompress = T), 180 SLTU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sltu, SelImm.X , xWen = T, canRobCompress = T), 181 AND -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.and , SelImm.X , xWen = T, canRobCompress = T), 182 OR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.or , SelImm.X , xWen = T, canRobCompress = T), 183 XOR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.xor , SelImm.X , xWen = T, canRobCompress = T), 184 SRA -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sra , SelImm.X , xWen = T, canRobCompress = T), 185 SRL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.srl , SelImm.X , xWen = T, canRobCompress = T), 186 187 MUL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mul, MDUOpType.mul , SelImm.X, xWen = T, canRobCompress = T), 188 MULH -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mul, MDUOpType.mulh , SelImm.X, xWen = T, canRobCompress = T), 189 MULHU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mul, MDUOpType.mulhu , SelImm.X, xWen = T, canRobCompress = T), 190 MULHSU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mul, MDUOpType.mulhsu, SelImm.X, xWen = T, canRobCompress = T), 191 MULW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mul, MDUOpType.mulw , SelImm.X, xWen = T, canRobCompress = T), 192 193 DIV -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.div , SelImm.X, xWen = T, canRobCompress = T), 194 DIVU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.divu , SelImm.X, xWen = T, canRobCompress = T), 195 REM -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.rem , SelImm.X, xWen = T, canRobCompress = T), 196 REMU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.remu , SelImm.X, xWen = T, canRobCompress = T), 197 DIVW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.divw , SelImm.X, xWen = T, canRobCompress = T), 198 DIVUW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.divuw , SelImm.X, xWen = T, canRobCompress = T), 199 REMW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.remw , SelImm.X, xWen = T, canRobCompress = T), 200 REMUW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.div, MDUOpType.remuw , SelImm.X, xWen = T, canRobCompress = T), 201 202 AUIPC -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType. 203 204 jmp, JumpOpType.auipc, SelImm.IMM_U , xWen = T), 205 JAL -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.jmp, JumpOpType.jal , SelImm.IMM_UJ, xWen = T), 206 JALR -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.jmp, JumpOpType.jalr , SelImm.IMM_I , uopSplitType = UopSplitType.SCA_SIM, xWen = T), 207 BEQ -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.beq , SelImm.IMM_SB ), 208 BNE -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bne , SelImm.IMM_SB ), 209 BGE -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bge , SelImm.IMM_SB ), 210 BGEU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bgeu , SelImm.IMM_SB ), 211 BLT -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.blt , SelImm.IMM_SB ), 212 BLTU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bltu , SelImm.IMM_SB ), 213 214 // I-type, the immediate12 holds the CSR register. 215 CSRRW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.wrt , SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 216 CSRRS -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.set , SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 217 CSRRC -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.clr , SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 218 219 CSRRWI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.wrti, SelImm.IMM_Z, xWen = T, noSpec = T, blockBack = T), 220 CSRRSI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.seti, SelImm.IMM_Z, xWen = T, noSpec = T, blockBack = T), 221 CSRRCI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.clri, SelImm.IMM_Z, xWen = T, noSpec = T, blockBack = T), 222 223 EBREAK -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 224 ECALL -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 225 SRET -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 226 MRET -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 227 DRET -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 228 WFI -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.csr, CSROpType.wfi, SelImm.X , xWen = T, noSpec = T, blockBack = T), 229 230 SFENCE_VMA -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.fence, FenceOpType.sfence, SelImm.X, noSpec = T, blockBack = T, flushPipe = T), 231 FENCE_I -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.fence, FenceOpType.fencei, SelImm.X, noSpec = T, blockBack = T, flushPipe = T), 232 FENCE -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.fence, FenceOpType.fence , SelImm.X, noSpec = T, blockBack = T, flushPipe = T), 233 234 // A-type 235 AMOADD_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoadd_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 236 AMOXOR_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoxor_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 237 AMOSWAP_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoswap_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 238 AMOAND_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoand_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 239 AMOOR_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoor_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 240 AMOMIN_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomin_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 241 AMOMINU_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amominu_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 242 AMOMAX_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomax_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 243 AMOMAXU_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomaxu_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 244 245 AMOADD_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoadd_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 246 AMOXOR_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoxor_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 247 AMOSWAP_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoswap_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 248 AMOAND_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoand_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 249 AMOOR_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoor_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 250 AMOMIN_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomin_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 251 AMOMINU_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amominu_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 252 AMOMAX_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomax_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 253 AMOMAXU_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomaxu_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 254 255 LR_W -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.mou, LSUOpType.lr_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 256 LR_D -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.mou, LSUOpType.lr_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 257 SC_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.sc_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 258 SC_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.sc_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 259 260 ANDN -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.andn, SelImm.X, xWen = T, canRobCompress = T), 261 ORN -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.orn , SelImm.X, xWen = T, canRobCompress = T), 262 XNOR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.xnor, SelImm.X, xWen = T, canRobCompress = T), 263 ORC_B -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.orcb, SelImm.X, xWen = T, canRobCompress = T), 264 265 MIN -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.min , SelImm.X, xWen = T, canRobCompress = T), 266 MINU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.minu, SelImm.X, xWen = T, canRobCompress = T), 267 MAX -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.max , SelImm.X, xWen = T, canRobCompress = T), 268 MAXU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.maxu, SelImm.X, xWen = T, canRobCompress = T), 269 270 SEXT_B -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.sextb, SelImm.X, xWen = T, canRobCompress = T), 271 PACKH -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.packh, SelImm.X, xWen = T, canRobCompress = T), 272 SEXT_H -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.sexth, SelImm.X, xWen = T, canRobCompress = T), 273 PACKW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.packw, SelImm.X, xWen = T, canRobCompress = T), 274 BREV8 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.revb , SelImm.X, xWen = T, canRobCompress = T), 275 REV8 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.rev8 , SelImm.X, xWen = T, canRobCompress = T), 276 PACK -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.pack , SelImm.X, xWen = T, canRobCompress = T), 277 278 BSET -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.bset, SelImm.X , xWen = T, canRobCompress = T), 279 BSETI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.bset, SelImm.IMM_I, xWen = T, canRobCompress = T), 280 BCLR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.bclr, SelImm.X , xWen = T, canRobCompress = T), 281 BCLRI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.bclr, SelImm.IMM_I, xWen = T, canRobCompress = T), 282 BINV -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.binv, SelImm.X , xWen = T, canRobCompress = T), 283 BINVI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.binv, SelImm.IMM_I, xWen = T, canRobCompress = T), 284 BEXT -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.bext, SelImm.X , xWen = T, canRobCompress = T), 285 BEXTI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.bext, SelImm.IMM_I, xWen = T, canRobCompress = T), 286 287 ROR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.ror, SelImm.X , xWen = T, canRobCompress = T), 288 RORI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.ror, SelImm.IMM_I , xWen = T, canRobCompress = T), 289 ROL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.rol, SelImm.X , xWen = T, canRobCompress = T), 290 291 SH1ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh1add , SelImm.X , xWen = T, canRobCompress = T), 292 SH2ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh2add , SelImm.X , xWen = T, canRobCompress = T), 293 SH3ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh3add , SelImm.X , xWen = T, canRobCompress = T), 294 SH1ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh1adduw, SelImm.X , xWen = T, canRobCompress = T), 295 SH2ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh2adduw, SelImm.X , xWen = T, canRobCompress = T), 296 SH3ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh3adduw, SelImm.X , xWen = T, canRobCompress = T), 297 ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.adduw , SelImm.X , xWen = T, canRobCompress = T), 298 SLLI_UW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.slliuw , SelImm.IMM_I, xWen = T, canRobCompress = T), 299 ) 300} 301 302/** 303 * FP Decode constants 304 */ 305object FpDecode extends DecodeConstants{ 306 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 307 FLW -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lw, selImm = SelImm.IMM_I, fWen = T), 308 FLD -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.ld, selImm = SelImm.IMM_I, fWen = T), 309 FSW -> FDecode(SrcType.reg, SrcType.fp, SrcType.X, FuType.stu, LSUOpType.sw, selImm = SelImm.IMM_S ), 310 FSD -> FDecode(SrcType.reg, SrcType.fp, SrcType.X, FuType.stu, LSUOpType.sd, selImm = SelImm.IMM_S ), 311 312 FMV_X_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 313 FMV_X_W -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 314 315 FMV_D_X -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 316 FMV_W_X -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 317 318 // FP to FP 319 FCVT_S_D -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 320 FCVT_D_S -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 321 322 // Int to FP 323 FCVT_S_W -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 324 FCVT_S_WU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 325 FCVT_S_L -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 326 FCVT_S_LU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 327 328 FCVT_D_W -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 329 FCVT_D_WU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 330 FCVT_D_L -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 331 FCVT_D_LU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 332 333 // FP to Int 334 FCVT_W_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 335 FCVT_WU_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 336 FCVT_L_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 337 FCVT_LU_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 338 339 FCVT_W_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 340 FCVT_WU_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 341 FCVT_L_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 342 FCVT_LU_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 343 344 ) 345} 346 347/** 348 * Bit Manipulation Decode 349 */ 350object BDecode extends DecodeConstants{ 351 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 352 // Basic bit manipulation 353 CLZ -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.clz, SelImm.X, xWen = T, canRobCompress = T), 354 CTZ -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.ctz, SelImm.X, xWen = T, canRobCompress = T), 355 CPOP -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.cpop, SelImm.X, xWen = T, canRobCompress = T), 356 XPERM8 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.xpermb, SelImm.X, xWen = T, canRobCompress = T), 357 XPERM4 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.xpermn, SelImm.X, xWen = T, canRobCompress = T), 358 359 CLZW -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.clzw, SelImm.X, xWen = T, canRobCompress = T), 360 CTZW -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.ctzw, SelImm.X, xWen = T, canRobCompress = T), 361 CPOPW -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.cpopw, SelImm.X, xWen = T, canRobCompress = T), 362 363 CLMUL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.clmul, SelImm.X, xWen = T, canRobCompress = T), 364 CLMULH -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.clmulh, SelImm.X, xWen = T, canRobCompress = T), 365 CLMULR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.clmulr, SelImm.X, xWen = T, canRobCompress = T), 366 367 AES64ES -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64es, SelImm.X , xWen = T, canRobCompress = T), 368 AES64ESM -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64esm, SelImm.X , xWen = T, canRobCompress = T), 369 AES64DS -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64ds, SelImm.X , xWen = T, canRobCompress = T), 370 AES64DSM -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64dsm, SelImm.X , xWen = T, canRobCompress = T), 371 AES64IM -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.aes64im, SelImm.X , xWen = T, canRobCompress = T), 372 AES64KS1I -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.bku, BKUOpType.aes64ks1i, SelImm.IMM_I, xWen = T, canRobCompress = T), 373 AES64KS2 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64ks2, SelImm.X , xWen = T, canRobCompress = T), 374 SHA256SUM0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sum0, SelImm.X , xWen = T, canRobCompress = T), 375 SHA256SUM1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sum1, SelImm.X , xWen = T, canRobCompress = T), 376 SHA256SIG0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sig0, SelImm.X , xWen = T, canRobCompress = T), 377 SHA256SIG1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sig1, SelImm.X , xWen = T, canRobCompress = T), 378 SHA512SUM0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sum0, SelImm.X , xWen = T, canRobCompress = T), 379 SHA512SUM1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sum1, SelImm.X , xWen = T, canRobCompress = T), 380 SHA512SIG0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sig0, SelImm.X , xWen = T, canRobCompress = T), 381 SHA512SIG1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sig1, SelImm.X , xWen = T, canRobCompress = T), 382 SM3P0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sm3p0, SelImm.X , xWen = T, canRobCompress = T), 383 SM3P1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sm3p1, SelImm.X , xWen = T, canRobCompress = T), 384 SM4KS0 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks0, SelImm.X , xWen = T, canRobCompress = T), 385 SM4KS1 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks1, SelImm.X , xWen = T, canRobCompress = T), 386 SM4KS2 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks2, SelImm.X , xWen = T, canRobCompress = T), 387 SM4KS3 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks3, SelImm.X , xWen = T, canRobCompress = T), 388 SM4ED0 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed0, SelImm.X , xWen = T, canRobCompress = T), 389 SM4ED1 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed1, SelImm.X , xWen = T, canRobCompress = T), 390 SM4ED2 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed2, SelImm.X , xWen = T, canRobCompress = T), 391 SM4ED3 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed3, SelImm.X , xWen = T, canRobCompress = T), 392 ) 393} 394 395/** 396 * FP Divide SquareRoot Constants 397 */ 398object FDivSqrtDecode extends DecodeConstants { 399 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 400 FDIV_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 401 FDIV_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 402 FSQRT_S -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 403 FSQRT_D -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 404 ) 405} 406 407/** 408 * Svinval extension Constants 409 */ 410object SvinvalDecode extends DecodeConstants { 411 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 412 /* sinval_vma is like sfence.vma , but sinval_vma can be dispatched and issued like normal instructions while sfence.vma 413 * must assure it is the ONLY instrucion executing in backend. 414 */ 415 SINVAL_VMA -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.fence, FenceOpType.sfence, SelImm.X), 416 /* sfecne.w.inval is the begin instrucion of a TLB flush which set *noSpecExec* and *blockBackward* signals 417 * so when it comes to dispatch , it will block all instruction after itself until all instrucions ahead of it in rob commit 418 * then dispatch and issue this instrucion to flush sbuffer to dcache 419 * after this instrucion commits , issue following sinval_vma instructions (out of order) to flush TLB 420 */ 421 SFENCE_W_INVAL -> XSDecode(SrcType.DC, SrcType.DC, SrcType.X, FuType.fence, FenceOpType.nofence, SelImm.X, noSpec = T, blockBack = T), 422 /* sfecne.inval.ir is the end instrucion of a TLB flush which set *noSpecExec* *blockBackward* and *flushPipe* signals 423 * so when it comes to dispatch , it will wait until all sinval_vma ahead of it in rob commit 424 * then dispatch and issue this instrucion 425 * when it commit at the head of rob , flush the pipeline since some instrucions have been fetched to ibuffer using old TLB map 426 */ 427 SFENCE_INVAL_IR -> XSDecode(SrcType.DC, SrcType.DC, SrcType.X, FuType.fence, FenceOpType.nofence, SelImm.X, noSpec = T, blockBack = T, flushPipe = T) 428 /* what is Svinval extension ? 429 * -----> sfecne.w.inval 430 * sfence.vma vpn1 -----> sinval_vma vpn1 431 * sfence.vma vpn2 -----> sinval_vma vpn2 432 * -----> sfecne.inval.ir 433 * 434 * sfence.vma should be executed in-order and it flushes the pipeline after committing 435 * we can parallel sfence instrucions with this extension 436 */ 437 ) 438} 439 440/* 441 * CBO decode 442 */ 443object CBODecode extends DecodeConstants { 444 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 445 CBO_ZERO -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_zero , SelImm.IMM_S), 446 CBO_CLEAN -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_clean, SelImm.IMM_S), 447 CBO_FLUSH -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_flush, SelImm.IMM_S), 448 CBO_INVAL -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_inval, SelImm.IMM_S) 449 ) 450} 451 452/** 453 * XiangShan Trap Decode constants 454 */ 455object XSTrapDecode extends DecodeConstants { 456 def TRAP = BitPat("b000000000000?????000000001101011") 457 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 458 TRAP -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.add, SelImm.IMM_I, xWen = T, xsTrap = T, noSpec = T, blockBack = T) 459 ) 460} 461 462abstract class Imm(val len: Int) extends Bundle { 463 def toImm32(minBits: UInt): UInt = do_toImm32(minBits(len - 1, 0)) 464 def do_toImm32(minBits: UInt): UInt 465 def minBitsFromInstr(instr: UInt): UInt 466} 467 468case class Imm_I() extends Imm(12) { 469 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits(len - 1, 0), 32) 470 471 override def minBitsFromInstr(instr: UInt): UInt = 472 Cat(instr(31, 20)) 473} 474 475case class Imm_S() extends Imm(12) { 476 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 477 478 override def minBitsFromInstr(instr: UInt): UInt = 479 Cat(instr(31, 25), instr(11, 7)) 480} 481 482case class Imm_B() extends Imm(12) { 483 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 484 485 override def minBitsFromInstr(instr: UInt): UInt = 486 Cat(instr(31), instr(7), instr(30, 25), instr(11, 8)) 487} 488 489case class Imm_U() extends Imm(20){ 490 override def do_toImm32(minBits: UInt): UInt = Cat(minBits(len - 1, 0), 0.U(12.W)) 491 492 override def minBitsFromInstr(instr: UInt): UInt = { 493 instr(31, 12) 494 } 495} 496 497case class Imm_J() extends Imm(20){ 498 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 499 500 override def minBitsFromInstr(instr: UInt): UInt = { 501 Cat(instr(31), instr(19, 12), instr(20), instr(30, 25), instr(24, 21)) 502 } 503} 504 505case class Imm_Z() extends Imm(12 + 5){ 506 override def do_toImm32(minBits: UInt): UInt = minBits 507 508 override def minBitsFromInstr(instr: UInt): UInt = { 509 Cat(instr(19, 15), instr(31, 20)) 510 } 511} 512 513case class Imm_B6() extends Imm(6){ 514 override def do_toImm32(minBits: UInt): UInt = ZeroExt(minBits, 32) 515 516 override def minBitsFromInstr(instr: UInt): UInt = { 517 instr(25, 20) 518 } 519} 520 521case class Imm_OPIVIS() extends Imm(5){ 522 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 523 524 override def minBitsFromInstr(instr: UInt): UInt = { 525 instr(19, 15) 526 } 527} 528 529case class Imm_OPIVIU() extends Imm(5){ 530 override def do_toImm32(minBits: UInt): UInt = ZeroExt(minBits, 32) 531 532 override def minBitsFromInstr(instr: UInt): UInt = { 533 instr(19, 15) 534 } 535} 536 537case class Imm_VSETVLI() extends Imm(11){ 538 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 539 540 override def minBitsFromInstr(instr: UInt): UInt = { 541 instr(30, 20) 542 } 543} 544 545case class Imm_VSETIVLI() extends Imm(13){ 546 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 547 548 override def minBitsFromInstr(instr: UInt): UInt = { 549 val rvInst: XSInstBitFields = instr.asTypeOf(new XSInstBitFields) 550 val uimm5 = rvInst.UIMM_VSETIVLI 551 val vtype8 = rvInst.ZIMM_VTYPE 552 Cat(uimm5, vtype8) 553 } 554 /** 555 * get VType from extended imm 556 * @param extedImm 557 * @return VType 558 */ 559 def getVType(extedImm: UInt): InstVType = { 560 val vtype = Wire(new InstVType) 561 vtype := extedImm(7, 0).asTypeOf(new InstVType) 562 vtype 563 } 564 565 def getAvl(extedImm: UInt): UInt = { 566 extedImm(12, 8) 567 } 568} 569 570case class Imm_LUI32() extends Imm(32){ 571 override def do_toImm32(minBits: UInt): UInt = minBits(31, 0) 572 573 override def minBitsFromInstr(instr: UInt): UInt = { 574 instr(31, 0) 575 } 576} 577 578object ImmUnion { 579 val I = Imm_I() 580 val S = Imm_S() 581 val B = Imm_B() 582 val U = Imm_U() 583 val J = Imm_J() 584 val Z = Imm_Z() 585 val B6 = Imm_B6() 586 val OPIVIS = Imm_OPIVIS() 587 val OPIVIU = Imm_OPIVIU() 588 val VSETVLI = Imm_VSETVLI() 589 val VSETIVLI = Imm_VSETIVLI() 590 val LUI32 = Imm_LUI32() 591 592 val imms = Seq(I, S, B, U, J, Z, B6, OPIVIS, OPIVIU, VSETVLI, VSETIVLI) 593 val maxLen = imms.maxBy(_.len).len 594 val immSelMap = Seq( 595 SelImm.IMM_I, 596 SelImm.IMM_S, 597 SelImm.IMM_SB, 598 SelImm.IMM_U, 599 SelImm.IMM_UJ, 600 SelImm.IMM_Z, 601 SelImm.IMM_B6, 602 SelImm.IMM_OPIVIS, 603 SelImm.IMM_OPIVIU, 604 SelImm.IMM_VSETVLI, 605 SelImm.IMM_VSETIVLI, 606 ).zip(imms) 607 println(s"ImmUnion max len: $maxLen") 608} 609 610case class Imm_LUI_LOAD() { 611 def immFromLuiLoad(lui_imm: UInt, load_imm: UInt): UInt = { 612 val loadImm = load_imm(Imm_I().len - 1, 0) 613 Cat(lui_imm(ImmUnion.maxLen - loadImm.getWidth - 1, 0), loadImm) 614 } 615 def getLuiImm(uop: DynInst): UInt = { 616 val loadImmLen = Imm_I().len 617 val imm_u = Cat(uop.psrc(1), uop.psrc(0), uop.imm(ImmUnion.maxLen - 1, loadImmLen)) 618 Cat(Imm_U().toImm32(imm_u)(31, loadImmLen), uop.imm(loadImmLen - 1, 0)) 619 } 620} 621 622/** 623 * IO bundle for the Decode unit 624 */ 625class DecodeUnitIO(implicit p: Parameters) extends XSBundle { 626 val enq = new Bundle { 627 val ctrlFlow = Input(new StaticInst) 628 val vtype = Input(new VType) 629 } 630// val vconfig = Input(UInt(XLEN.W)) 631 val deq = new Bundle { 632 val decodedInst = Output(new DecodedInst) 633 val isComplex = Output(Bool()) 634 val uopInfo = Output(new UopInfo) 635 } 636 val csrCtrl = Input(new CustomCSRCtrlIO) 637} 638 639/** 640 * Decode unit that takes in a single CtrlFlow and generates a CfCtrl. 641 */ 642class DecodeUnit(implicit p: Parameters) extends XSModule with DecodeUnitConstants { 643 val io = IO(new DecodeUnitIO) 644 645 val ctrl_flow = io.enq.ctrlFlow // input with RVC Expanded 646 647 private val inst: XSInstBitFields = io.enq.ctrlFlow.instr.asTypeOf(new XSInstBitFields) 648 649 val decode_table: Array[(BitPat, List[BitPat])] = XDecode.table ++ 650 FpDecode.table ++ 651// FDivSqrtDecode.table ++ 652 X64Decode.table ++ 653 XSTrapDecode.table ++ 654 BDecode.table ++ 655 CBODecode.table ++ 656 SvinvalDecode.table ++ 657 VecDecoder.table 658 659 require(decode_table.map(_._2.length == 15).reduce(_ && _), "Decode tables have different column size") 660 // assertion for LUI: only LUI should be assigned `selImm === SelImm.IMM_U && fuType === FuType.alu` 661 val luiMatch = (t: Seq[BitPat]) => t(3).value == FuType.alu.ohid && t.reverse.head.value == SelImm.IMM_U.litValue 662 val luiTable = decode_table.filter(t => luiMatch(t._2)).map(_._1).distinct 663 assert(luiTable.length == 1 && luiTable.head == LUI, "Conflicts: LUI is determined by FuType and SelImm in Dispatch") 664 665 // output 666 val decodedInst: DecodedInst = Wire(new DecodedInst()).decode(ctrl_flow.instr, decode_table) 667 668 val fpDecoder = Module(new FPDecoder) 669 fpDecoder.io.instr := ctrl_flow.instr 670 decodedInst.fpu := fpDecoder.io.fpCtrl 671 672 decodedInst.connectStaticInst(io.enq.ctrlFlow) 673 674 decodedInst.uopIdx := 0.U 675 decodedInst.firstUop := true.B 676 decodedInst.lastUop := true.B 677 decodedInst.numUops := 1.U 678 679 val isMove = BitPat("b000000000000_?????_000_?????_0010011") === ctrl_flow.instr 680 decodedInst.isMove := isMove && inst.RD =/= 0.U 681 682 private val v0Idx = 0 683 private val vconfigIdx = VCONFIG_IDX 684 685 // read src1~3 location 686 decodedInst.lsrc(0) := inst.RS1 687 decodedInst.lsrc(1) := inst.RS2 688 decodedInst.lsrc(2) := inst.FS3 689 decodedInst.lsrc(3) := v0Idx.U 690 decodedInst.lsrc(4) := vconfigIdx.U 691 decodedInst.srcType(3) := Mux(inst.VM.asBool, SrcType.DC, SrcType.vp) // mask src 692 decodedInst.srcType(4) := SrcType.vp // vconfig 693 694 // cs.lsrc(2) := Mux(FuType.isVecExu(cs.fuType), ctrl_flow.instr(RD_MSB, RD_LSB), ctrl_flow.instr(RS3_MSB, RS3_LSB)) 695 // read dest location 696 decodedInst.ldest := inst.RD 697 698 // fill in exception vector 699 val vecException = Module(new VecExceptionGen) 700 vecException.io.inst := io.enq.ctrlFlow.instr 701 vecException.io.decodedInst := decodedInst 702 vecException.io.vtype := decodedInst.vpu.vtype 703 decodedInst.exceptionVec(illegalInstr) := decodedInst.selImm === SelImm.INVALID_INSTR || vecException.io.illegalInst 704 705 when (!io.csrCtrl.svinval_enable) { 706 val base_ii = decodedInst.selImm === SelImm.INVALID_INSTR || vecException.io.illegalInst 707 val sinval = BitPat("b0001011_?????_?????_000_00000_1110011") === ctrl_flow.instr 708 val w_inval = BitPat("b0001100_00000_00000_000_00000_1110011") === ctrl_flow.instr 709 val inval_ir = BitPat("b0001100_00001_00000_000_00000_1110011") === ctrl_flow.instr 710 val svinval_ii = sinval || w_inval || inval_ir 711 decodedInst.exceptionVec(illegalInstr) := base_ii || svinval_ii 712 decodedInst.flushPipe := false.B 713 } 714 715 // fix frflags 716 // fflags zero csrrs rd csr 717 val isFrflags = BitPat("b000000000001_00000_010_?????_1110011") === ctrl_flow.instr 718 when (decodedInst.fuType === FuType.csr.U && isFrflags) { 719 decodedInst.blockBackward := false.B 720 } 721 722 decodedInst.imm := LookupTree(decodedInst.selImm, ImmUnion.immSelMap.map( 723 x => { 724 val minBits = x._2.minBitsFromInstr(ctrl_flow.instr) 725 require(minBits.getWidth == x._2.len) 726 x._1 -> minBits 727 } 728 )) 729 730 decodedInst.commitType := 0.U // Todo: remove it 731 732 decodedInst.isVset := FuType.isVset(decodedInst.fuType) 733 734 private val needReverseInsts = Seq(VRSUB_VI, VRSUB_VX, VREM_VV, VREM_VX, VREMU_VV, VFRDIV_VF, VFRSUB_VF, VFMV_F_S) 735 private val vextInsts = Seq(VZEXT_VF2, VZEXT_VF4, VZEXT_VF8, VSEXT_VF2, VSEXT_VF4, VSEXT_VF8) 736 private val narrowInsts = Seq( 737 VNSRA_WV, VNSRA_WX, VNSRA_WI, VNSRL_WV, VNSRL_WX, VNSRL_WI, 738 VNCLIP_WV, VNCLIP_WX, VNCLIP_WI, VNCLIPU_WV, VNCLIPU_WX, VNCLIPU_WI, 739 ) 740 private val maskDstInsts = Seq( 741 VMADC_VV, VMADC_VX, VMADC_VI, VMADC_VVM, VMADC_VXM, VMADC_VIM, 742 VMSBC_VV, VMSBC_VX, VMSBC_VVM, VMSBC_VXM, 743 VMAND_MM, VMNAND_MM, VMANDN_MM, VMXOR_MM, VMOR_MM, VMNOR_MM, VMORN_MM, VMXNOR_MM, 744 VMSEQ_VV, VMSEQ_VX, VMSEQ_VI, VMSNE_VV, VMSNE_VX, VMSNE_VI, 745 VMSLE_VV, VMSLE_VX, VMSLE_VI, VMSLEU_VV, VMSLEU_VX, VMSLEU_VI, 746 VMSLT_VV, VMSLT_VX, VMSLTU_VV, VMSLTU_VX, 747 VMSGT_VX, VMSGT_VI, VMSGTU_VX, VMSGTU_VI, 748 VMFEQ_VV, VMFEQ_VF, VMFNE_VV, VMFNE_VF, VMFLT_VV, VMFLT_VF, VMFLE_VV, VMFLE_VF, VMFGT_VF, VMFGE_VF, 749 ) 750 private val maskOpInsts = Seq( 751 VMAND_MM, VMNAND_MM, VMANDN_MM, VMXOR_MM, VMOR_MM, VMNOR_MM, VMORN_MM, VMXNOR_MM, 752 ) 753 private val wfflagsInsts = Seq( 754 // opfff 755 FADD_S, FSUB_S, FADD_D, FSUB_D, 756 FEQ_S, FLT_S, FLE_S, FEQ_D, FLT_D, FLE_D, 757 FMIN_S, FMAX_S, FMIN_D, FMAX_D, 758 FMUL_S, FMUL_D, 759 FDIV_S, FDIV_D, FSQRT_S, FSQRT_D, 760 FMADD_S, FMSUB_S, FNMADD_S, FNMSUB_S, FMADD_D, FMSUB_D, FNMADD_D, FNMSUB_D, 761 FSGNJ_S, FSGNJN_S, FSGNJX_S, 762 // opfvv 763 VFADD_VV, VFSUB_VV, VFWADD_VV, VFWSUB_VV, VFWADD_WV, VFWSUB_WV, 764 VFMUL_VV, VFDIV_VV, VFWMUL_VV, 765 VFMACC_VV, VFNMACC_VV, VFMSAC_VV, VFNMSAC_VV, VFMADD_VV, VFNMADD_VV, VFMSUB_VV, VFNMSUB_VV, 766 VFWMACC_VV, VFWNMACC_VV, VFWMSAC_VV, VFWNMSAC_VV, 767 VFSQRT_V, 768 VFMIN_VV, VFMAX_VV, 769 VMFEQ_VV, VMFNE_VV, VMFLT_VV, VMFLE_VV, 770 VFSGNJ_VV, VFSGNJN_VV, VFSGNJX_VV, 771 // opfvf 772 VFADD_VF, VFSUB_VF, VFRSUB_VF, VFWADD_VF, VFWSUB_VF, VFWADD_WF, VFWSUB_WF, 773 VFMUL_VF, VFDIV_VF, VFRDIV_VF, VFWMUL_VF, 774 VFMACC_VF, VFNMACC_VF, VFMSAC_VF, VFNMSAC_VF, VFMADD_VF, VFNMADD_VF, VFMSUB_VF, VFNMSUB_VF, 775 VFWMACC_VF, VFWNMACC_VF, VFWMSAC_VF, VFWNMSAC_VF, 776 VFMIN_VF, VFMAX_VF, 777 VMFEQ_VF, VMFNE_VF, VMFLT_VF, VMFLE_VF, VMFGT_VF, VMFGE_VF, 778 VFSGNJ_VF, VFSGNJN_VF, VFSGNJX_VF, 779 // fcvt & vfcvt 780 FCVT_S_W, FCVT_S_WU, FCVT_S_L, FCVT_S_LU, 781 FCVT_W_S, FCVT_WU_S, FCVT_L_S, FCVT_LU_S, 782 FCVT_D_W, FCVT_D_WU, FCVT_D_L, FCVT_D_LU, 783 FCVT_W_D, FCVT_WU_D, FCVT_L_D, FCVT_LU_D, FCVT_S_D, FCVT_D_S, 784 ) 785 decodedInst.wfflags := wfflagsInsts.map(_ === inst.ALL).reduce(_ || _) 786 val fpToVecDecoder = Module(new FPToVecDecoder()) 787 fpToVecDecoder.io.instr := inst.asUInt 788 val isFpToVecInst = fpToVecDecoder.io.vpuCtrl.fpu.isFpToVecInst 789 decodedInst.vpu := 0.U.asTypeOf(decodedInst.vpu) // Todo: Connect vpu decoder 790 when(isFpToVecInst){ 791 decodedInst.vpu := fpToVecDecoder.io.vpuCtrl 792 }.otherwise{ 793 decodedInst.vpu.vill := io.enq.vtype.illegal 794 decodedInst.vpu.vma := io.enq.vtype.vma 795 decodedInst.vpu.vta := io.enq.vtype.vta 796 decodedInst.vpu.vsew := io.enq.vtype.vsew 797 decodedInst.vpu.vlmul := io.enq.vtype.vlmul 798 decodedInst.vpu.vm := inst.VM 799 decodedInst.vpu.nf := inst.NF 800 decodedInst.vpu.needScalaSrc := Category.needScalaSrc(inst.VCATEGORY) 801 decodedInst.vpu.permImmTruncate := Category.permImmTruncate(inst.VCATEGORY) 802 decodedInst.vpu.isReverse := needReverseInsts.map(_ === inst.ALL).reduce(_ || _) 803 decodedInst.vpu.isExt := vextInsts.map(_ === inst.ALL).reduce(_ || _) 804 decodedInst.vpu.isNarrow := narrowInsts.map(_ === inst.ALL).reduce(_ || _) 805 decodedInst.vpu.isDstMask := maskDstInsts.map(_ === inst.ALL).reduce(_ || _) 806 decodedInst.vpu.isOpMask := maskOpInsts.map(_ === inst.ALL).reduce(_ || _) 807 } 808 809 val uopInfoGen = Module(new UopInfoGen) 810 uopInfoGen.io.in.preInfo.typeOfSplit := decodedInst.uopSplitType 811 uopInfoGen.io.in.preInfo.vsew := decodedInst.vpu.vsew 812 uopInfoGen.io.in.preInfo.vlmul := decodedInst.vpu.vlmul 813 uopInfoGen.io.in.preInfo.vwidth := inst.RM 814 io.deq.isComplex := uopInfoGen.io.out.isComplex 815 io.deq.uopInfo.numOfUop := uopInfoGen.io.out.uopInfo.numOfUop 816 io.deq.uopInfo.lmul := uopInfoGen.io.out.uopInfo.lmul 817 818 io.deq.decodedInst := decodedInst 819 820 //------------------------------------------------------------- 821 // Debug Info 822// XSDebug("in: instr=%x pc=%x excepVec=%b crossPageIPFFix=%d\n", 823// io.enq.ctrl_flow.instr, io.enq.ctrl_flow.pc, io.enq.ctrl_flow.exceptionVec.asUInt, 824// io.enq.ctrl_flow.crossPageIPFFix) 825// XSDebug("out: srcType(0)=%b srcType(1)=%b srcType(2)=%b lsrc(0)=%d lsrc(1)=%d lsrc(2)=%d ldest=%d fuType=%b fuOpType=%b\n", 826// io.deq.cf_ctrl.ctrl.srcType(0), io.deq.cf_ctrl.ctrl.srcType(1), io.deq.cf_ctrl.ctrl.srcType(2), 827// io.deq.cf_ctrl.ctrl.lsrc(0), io.deq.cf_ctrl.ctrl.lsrc(1), io.deq.cf_ctrl.ctrl.lsrc(2), 828// io.deq.cf_ctrl.ctrl.ldest, io.deq.cf_ctrl.ctrl.fuType, io.deq.cf_ctrl.ctrl.fuOpType) 829// XSDebug("out: rfWen=%d fpWen=%d isXSTrap=%d noSpecExec=%d isBlocked=%d flushPipe=%d imm=%x\n", 830// io.deq.cf_ctrl.ctrl.rfWen, io.deq.cf_ctrl.ctrl.fpWen, io.deq.cf_ctrl.ctrl.isXSTrap, 831// io.deq.cf_ctrl.ctrl.noSpecExec, io.deq.cf_ctrl.ctrl.blockBackward, io.deq.cf_ctrl.ctrl.flushPipe, 832// io.deq.cf_ctrl.ctrl.imm) 833// XSDebug("out: excepVec=%b\n", io.deq.cf_ctrl.cf.exceptionVec.asUInt) 834} 835