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: Int, 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: Int, 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.jmp, JumpOpType.auipc, SelImm.IMM_U , xWen = T), 203 JAL -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.jmp, JumpOpType.jal , SelImm.IMM_UJ, xWen = T), 204 JALR -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.jmp, JumpOpType.jalr , SelImm.IMM_I , uopSplitType = UopSplitType.SCA_SIM, xWen = T), 205 BEQ -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.beq , SelImm.IMM_SB ), 206 BNE -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bne , SelImm.IMM_SB ), 207 BGE -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bge , SelImm.IMM_SB ), 208 BGEU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bgeu , SelImm.IMM_SB ), 209 BLT -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.blt , SelImm.IMM_SB ), 210 BLTU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.brh, BRUOpType.bltu , SelImm.IMM_SB ), 211 212 // I-type, the immediate12 holds the CSR register. 213 CSRRW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.wrt , SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 214 CSRRS -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.set , SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 215 CSRRC -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.clr , SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 216 217 CSRRWI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.wrti, SelImm.IMM_Z, xWen = T, noSpec = T, blockBack = T), 218 CSRRSI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.seti, SelImm.IMM_Z, xWen = T, noSpec = T, blockBack = T), 219 CSRRCI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.clri, SelImm.IMM_Z, xWen = T, noSpec = T, blockBack = T), 220 221 EBREAK -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 222 ECALL -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 223 SRET -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 224 MRET -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 225 DRET -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.csr, CSROpType.jmp, SelImm.IMM_I, xWen = T, noSpec = T, blockBack = T), 226 WFI -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.csr, CSROpType.wfi, SelImm.X , xWen = T, noSpec = T, blockBack = T), 227 228 SFENCE_VMA -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.fence, FenceOpType.sfence, SelImm.X, noSpec = T, blockBack = T, flushPipe = T), 229 FENCE_I -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.fence, FenceOpType.fencei, SelImm.X, noSpec = T, blockBack = T, flushPipe = T), 230 FENCE -> XSDecode(SrcType.pc , SrcType.imm, SrcType.X, FuType.fence, FenceOpType.fence , SelImm.X, noSpec = T, blockBack = T, flushPipe = T), 231 232 // A-type 233 AMOADD_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoadd_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 234 AMOXOR_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoxor_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 235 AMOSWAP_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoswap_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 236 AMOAND_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoand_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 237 AMOOR_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoor_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 238 AMOMIN_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomin_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 239 AMOMINU_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amominu_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 240 AMOMAX_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomax_w , SelImm.X, xWen = T, noSpec = T, blockBack = T), 241 AMOMAXU_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomaxu_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 242 243 AMOADD_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoadd_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 244 AMOXOR_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoxor_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 245 AMOSWAP_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoswap_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 246 AMOAND_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoand_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 247 AMOOR_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amoor_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 248 AMOMIN_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomin_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 249 AMOMINU_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amominu_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 250 AMOMAX_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomax_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 251 AMOMAXU_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.amomaxu_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 252 253 LR_W -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.mou, LSUOpType.lr_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 254 LR_D -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.mou, LSUOpType.lr_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 255 SC_W -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.sc_w, SelImm.X, xWen = T, noSpec = T, blockBack = T), 256 SC_D -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.mou, LSUOpType.sc_d, SelImm.X, xWen = T, noSpec = T, blockBack = T), 257 258 ANDN -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.andn, SelImm.X, xWen = T, canRobCompress = T), 259 ORN -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.orn , SelImm.X, xWen = T, canRobCompress = T), 260 XNOR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.xnor, SelImm.X, xWen = T, canRobCompress = T), 261 ORC_B -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.orcb, SelImm.X, xWen = T, canRobCompress = T), 262 263 MIN -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.min , SelImm.X, xWen = T, canRobCompress = T), 264 MINU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.minu, SelImm.X, xWen = T, canRobCompress = T), 265 MAX -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.max , SelImm.X, xWen = T, canRobCompress = T), 266 MAXU -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.maxu, SelImm.X, xWen = T, canRobCompress = T), 267 268 SEXT_B -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.sextb, SelImm.X, xWen = T, canRobCompress = T), 269 PACKH -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.packh, SelImm.X, xWen = T, canRobCompress = T), 270 SEXT_H -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.sexth, SelImm.X, xWen = T, canRobCompress = T), 271 PACKW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.packw, SelImm.X, xWen = T, canRobCompress = T), 272 BREV8 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.revb , SelImm.X, xWen = T, canRobCompress = T), 273 REV8 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.alu, ALUOpType.rev8 , SelImm.X, xWen = T, canRobCompress = T), 274 PACK -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.pack , SelImm.X, xWen = T, canRobCompress = T), 275 276 BSET -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.bset, SelImm.X , xWen = T, canRobCompress = T), 277 BSETI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.bset, SelImm.IMM_I, xWen = T, canRobCompress = T), 278 BCLR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.bclr, SelImm.X , xWen = T, canRobCompress = T), 279 BCLRI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.bclr, SelImm.IMM_I, xWen = T, canRobCompress = T), 280 BINV -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.binv, SelImm.X , xWen = T, canRobCompress = T), 281 BINVI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.binv, SelImm.IMM_I, xWen = T, canRobCompress = T), 282 BEXT -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.bext, SelImm.X , xWen = T, canRobCompress = T), 283 BEXTI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.bext, SelImm.IMM_I, xWen = T, canRobCompress = T), 284 285 ROR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.ror, SelImm.X , xWen = T, canRobCompress = T), 286 RORI -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.ror, SelImm.IMM_I , xWen = T, canRobCompress = T), 287 ROL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.rol, SelImm.X , xWen = T, canRobCompress = T), 288 289 SH1ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh1add , SelImm.X , xWen = T, canRobCompress = T), 290 SH2ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh2add , SelImm.X , xWen = T, canRobCompress = T), 291 SH3ADD -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh3add , SelImm.X , xWen = T, canRobCompress = T), 292 SH1ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh1adduw, SelImm.X , xWen = T, canRobCompress = T), 293 SH2ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh2adduw, SelImm.X , xWen = T, canRobCompress = T), 294 SH3ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.sh3adduw, SelImm.X , xWen = T, canRobCompress = T), 295 ADD_UW -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.alu, ALUOpType.adduw , SelImm.X , xWen = T, canRobCompress = T), 296 SLLI_UW -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.slliuw , SelImm.IMM_I, xWen = T, canRobCompress = T), 297 ) 298} 299 300/** 301 * FP Decode constants 302 */ 303object FpDecode extends DecodeConstants{ 304 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 305 FLW -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.lw, selImm = SelImm.IMM_I, fWen = T), 306 FLD -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.ldu, LSUOpType.ld, selImm = SelImm.IMM_I, fWen = T), 307 FSW -> FDecode(SrcType.reg, SrcType.fp, SrcType.X, FuType.stu, LSUOpType.sw, selImm = SelImm.IMM_S ), 308 FSD -> FDecode(SrcType.reg, SrcType.fp, SrcType.X, FuType.stu, LSUOpType.sd, selImm = SelImm.IMM_S ), 309 310 FCLASS_S-> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 311 FCLASS_D-> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 312 313 FMV_X_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 314 FMV_X_W -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 315 316 FMV_D_X -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 317 FMV_W_X -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 318 319 FSGNJ_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 320 FSGNJ_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 321 FSGNJX_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 322 FSGNJX_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 323 FSGNJN_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 324 FSGNJN_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 325 326 // FP to FP 327 FCVT_S_D -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 328 FCVT_D_S -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 329 330 // Int to FP 331 FCVT_S_W -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 332 FCVT_S_WU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 333 FCVT_S_L -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 334 FCVT_S_LU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 335 336 FCVT_D_W -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 337 FCVT_D_WU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 338 FCVT_D_L -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 339 FCVT_D_LU -> FDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.i2f, FuOpType.X, fWen = T, canRobCompress = T), 340 341 // FP to Int 342 FCVT_W_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 343 FCVT_WU_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 344 FCVT_L_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 345 FCVT_LU_S -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 346 347 FCVT_W_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 348 FCVT_WU_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 349 FCVT_L_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 350 FCVT_LU_D -> FDecode(SrcType.fp , SrcType.imm, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 351 352 FEQ_S -> FDecode(SrcType.fp , SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 353 FLT_S -> FDecode(SrcType.fp , SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 354 FLE_S -> FDecode(SrcType.fp , SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 355 356 FEQ_D -> FDecode(SrcType.fp , SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 357 FLT_D -> FDecode(SrcType.fp , SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 358 FLE_D -> FDecode(SrcType.fp , SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, xWen = T, canRobCompress = T), 359 360 FMIN_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 361 FMAX_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 362 FMIN_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 363 FMAX_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmisc, FuOpType.X, fWen = T, canRobCompress = T), 364 365 FADD_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 366 FSUB_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 367 FMUL_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 368 FADD_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 369 FSUB_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 370 FMUL_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 371 372 FMADD_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 373 FMSUB_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 374 FNMADD_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 375 FNMSUB_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 376 FMADD_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 377 FMSUB_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 378 FNMADD_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 379 FNMSUB_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, FuOpType.X, fWen = T, canRobCompress = T), 380 ) 381} 382 383/** 384 * Bit Manipulation Decode 385 */ 386object BDecode extends DecodeConstants{ 387 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 388 // Basic bit manipulation 389 CLZ -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.clz, SelImm.X, xWen = T, canRobCompress = T), 390 CTZ -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.ctz, SelImm.X, xWen = T, canRobCompress = T), 391 CPOP -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.cpop, SelImm.X, xWen = T, canRobCompress = T), 392 XPERM8 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.xpermb, SelImm.X, xWen = T, canRobCompress = T), 393 XPERM4 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.xpermn, SelImm.X, xWen = T, canRobCompress = T), 394 395 CLZW -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.clzw, SelImm.X, xWen = T, canRobCompress = T), 396 CTZW -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.ctzw, SelImm.X, xWen = T, canRobCompress = T), 397 CPOPW -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.cpopw, SelImm.X, xWen = T, canRobCompress = T), 398 399 CLMUL -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.clmul, SelImm.X, xWen = T, canRobCompress = T), 400 CLMULH -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.clmulh, SelImm.X, xWen = T, canRobCompress = T), 401 CLMULR -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.clmulr, SelImm.X, xWen = T, canRobCompress = T), 402 403 AES64ES -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64es, SelImm.X , xWen = T, canRobCompress = T), 404 AES64ESM -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64esm, SelImm.X , xWen = T, canRobCompress = T), 405 AES64DS -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64ds, SelImm.X , xWen = T, canRobCompress = T), 406 AES64DSM -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64dsm, SelImm.X , xWen = T, canRobCompress = T), 407 AES64IM -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.aes64im, SelImm.X , xWen = T, canRobCompress = T), 408 AES64KS1I -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.bku, BKUOpType.aes64ks1i, SelImm.IMM_I, xWen = T, canRobCompress = T), 409 AES64KS2 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.aes64ks2, SelImm.X , xWen = T, canRobCompress = T), 410 SHA256SUM0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sum0, SelImm.X , xWen = T, canRobCompress = T), 411 SHA256SUM1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sum1, SelImm.X , xWen = T, canRobCompress = T), 412 SHA256SIG0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sig0, SelImm.X , xWen = T, canRobCompress = T), 413 SHA256SIG1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha256sig1, SelImm.X , xWen = T, canRobCompress = T), 414 SHA512SUM0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sum0, SelImm.X , xWen = T, canRobCompress = T), 415 SHA512SUM1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sum1, SelImm.X , xWen = T, canRobCompress = T), 416 SHA512SIG0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sig0, SelImm.X , xWen = T, canRobCompress = T), 417 SHA512SIG1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sha512sig1, SelImm.X , xWen = T, canRobCompress = T), 418 SM3P0 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sm3p0, SelImm.X , xWen = T, canRobCompress = T), 419 SM3P1 -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.bku, BKUOpType.sm3p1, SelImm.X , xWen = T, canRobCompress = T), 420 SM4KS0 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks0, SelImm.X , xWen = T, canRobCompress = T), 421 SM4KS1 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks1, SelImm.X , xWen = T, canRobCompress = T), 422 SM4KS2 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks2, SelImm.X , xWen = T, canRobCompress = T), 423 SM4KS3 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ks3, SelImm.X , xWen = T, canRobCompress = T), 424 SM4ED0 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed0, SelImm.X , xWen = T, canRobCompress = T), 425 SM4ED1 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed1, SelImm.X , xWen = T, canRobCompress = T), 426 SM4ED2 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed2, SelImm.X , xWen = T, canRobCompress = T), 427 SM4ED3 -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.bku, BKUOpType.sm4ed3, SelImm.X , xWen = T, canRobCompress = T), 428 ) 429} 430 431/** 432 * FP Divide SquareRoot Constants 433 */ 434object FDivSqrtDecode extends DecodeConstants { 435 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 436 FDIV_S -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 437 FDIV_D -> FDecode(SrcType.fp, SrcType.fp, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 438 FSQRT_S -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 439 FSQRT_D -> FDecode(SrcType.fp, SrcType.imm, SrcType.X, FuType.fDivSqrt, FuOpType.X, fWen = T, canRobCompress = T), 440 ) 441} 442 443/** 444 * Svinval extension Constants 445 */ 446object SvinvalDecode extends DecodeConstants { 447 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 448 /* sinval_vma is like sfence.vma , but sinval_vma can be dispatched and issued like normal instructions while sfence.vma 449 * must assure it is the ONLY instrucion executing in backend. 450 */ 451 SINVAL_VMA -> XSDecode(SrcType.reg, SrcType.reg, SrcType.X, FuType.fence, FenceOpType.sfence, SelImm.X), 452 /* sfecne.w.inval is the begin instrucion of a TLB flush which set *noSpecExec* and *blockBackward* signals 453 * so when it comes to dispatch , it will block all instruction after itself until all instrucions ahead of it in rob commit 454 * then dispatch and issue this instrucion to flush sbuffer to dcache 455 * after this instrucion commits , issue following sinval_vma instructions (out of order) to flush TLB 456 */ 457 SFENCE_W_INVAL -> XSDecode(SrcType.DC, SrcType.DC, SrcType.X, FuType.fence, FenceOpType.nofence, SelImm.X, noSpec = T, blockBack = T), 458 /* sfecne.inval.ir is the end instrucion of a TLB flush which set *noSpecExec* *blockBackward* and *flushPipe* signals 459 * so when it comes to dispatch , it will wait until all sinval_vma ahead of it in rob commit 460 * then dispatch and issue this instrucion 461 * when it commit at the head of rob , flush the pipeline since some instrucions have been fetched to ibuffer using old TLB map 462 */ 463 SFENCE_INVAL_IR -> XSDecode(SrcType.DC, SrcType.DC, SrcType.X, FuType.fence, FenceOpType.nofence, SelImm.X, noSpec = T, blockBack = T, flushPipe = T) 464 /* what is Svinval extension ? 465 * -----> sfecne.w.inval 466 * sfence.vma vpn1 -----> sinval_vma vpn1 467 * sfence.vma vpn2 -----> sinval_vma vpn2 468 * -----> sfecne.inval.ir 469 * 470 * sfence.vma should be executed in-order and it flushes the pipeline after committing 471 * we can parallel sfence instrucions with this extension 472 */ 473 ) 474} 475 476/* 477 * CBO decode 478 */ 479object CBODecode extends DecodeConstants { 480 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 481 CBO_ZERO -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_zero , SelImm.IMM_S), 482 CBO_CLEAN -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_clean, SelImm.IMM_S), 483 CBO_FLUSH -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_flush, SelImm.IMM_S), 484 CBO_INVAL -> XSDecode(SrcType.reg, SrcType.DC, SrcType.X, FuType.stu, LSUOpType.cbo_inval, SelImm.IMM_S) 485 ) 486} 487 488/** 489 * XiangShan Trap Decode constants 490 */ 491object XSTrapDecode extends DecodeConstants { 492 def TRAP = BitPat("b000000000000?????000000001101011") 493 val decodeArray: Array[(BitPat, XSDecodeBase)] = Array( 494 TRAP -> XSDecode(SrcType.reg, SrcType.imm, SrcType.X, FuType.alu, ALUOpType.add, SelImm.IMM_I, xWen = T, xsTrap = T, noSpec = T, blockBack = T) 495 ) 496} 497 498abstract class Imm(val len: Int) extends Bundle { 499 def toImm32(minBits: UInt): UInt = do_toImm32(minBits(len - 1, 0)) 500 def do_toImm32(minBits: UInt): UInt 501 def minBitsFromInstr(instr: UInt): UInt 502} 503 504case class Imm_I() extends Imm(12) { 505 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits(len - 1, 0), 32) 506 507 override def minBitsFromInstr(instr: UInt): UInt = 508 Cat(instr(31, 20)) 509} 510 511case class Imm_S() extends Imm(12) { 512 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 513 514 override def minBitsFromInstr(instr: UInt): UInt = 515 Cat(instr(31, 25), instr(11, 7)) 516} 517 518case class Imm_B() extends Imm(12) { 519 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 520 521 override def minBitsFromInstr(instr: UInt): UInt = 522 Cat(instr(31), instr(7), instr(30, 25), instr(11, 8)) 523} 524 525case class Imm_U() extends Imm(20){ 526 override def do_toImm32(minBits: UInt): UInt = Cat(minBits(len - 1, 0), 0.U(12.W)) 527 528 override def minBitsFromInstr(instr: UInt): UInt = { 529 instr(31, 12) 530 } 531} 532 533case class Imm_J() extends Imm(20){ 534 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 535 536 override def minBitsFromInstr(instr: UInt): UInt = { 537 Cat(instr(31), instr(19, 12), instr(20), instr(30, 25), instr(24, 21)) 538 } 539} 540 541case class Imm_Z() extends Imm(12 + 5){ 542 override def do_toImm32(minBits: UInt): UInt = minBits 543 544 override def minBitsFromInstr(instr: UInt): UInt = { 545 Cat(instr(19, 15), instr(31, 20)) 546 } 547} 548 549case class Imm_B6() extends Imm(6){ 550 override def do_toImm32(minBits: UInt): UInt = ZeroExt(minBits, 32) 551 552 override def minBitsFromInstr(instr: UInt): UInt = { 553 instr(25, 20) 554 } 555} 556 557case class Imm_OPIVIS() extends Imm(5){ 558 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 559 560 override def minBitsFromInstr(instr: UInt): UInt = { 561 instr(19, 15) 562 } 563} 564 565case class Imm_OPIVIU() extends Imm(5){ 566 override def do_toImm32(minBits: UInt): UInt = ZeroExt(minBits, 32) 567 568 override def minBitsFromInstr(instr: UInt): UInt = { 569 instr(19, 15) 570 } 571} 572 573case class Imm_VSETVLI() extends Imm(11){ 574 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 575 576 override def minBitsFromInstr(instr: UInt): UInt = { 577 instr(30, 20) 578 } 579} 580 581case class Imm_VSETIVLI() extends Imm(13){ 582 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 583 584 override def minBitsFromInstr(instr: UInt): UInt = { 585 val rvInst: XSInstBitFields = instr.asTypeOf(new XSInstBitFields) 586 val uimm5 = rvInst.UIMM_VSETIVLI 587 val vtype8 = rvInst.ZIMM_VTYPE 588 Cat(uimm5, vtype8) 589 } 590 /** 591 * get VType from extended imm 592 * @param extedImm 593 * @return VType 594 */ 595 def getVType(extedImm: UInt): InstVType = { 596 val vtype = Wire(new InstVType) 597 vtype := extedImm(7, 0).asTypeOf(new InstVType) 598 vtype 599 } 600 601 def getAvl(extedImm: UInt): UInt = { 602 extedImm(12, 8) 603 } 604} 605object ImmUnion { 606 val I = Imm_I() 607 val S = Imm_S() 608 val B = Imm_B() 609 val U = Imm_U() 610 val J = Imm_J() 611 val Z = Imm_Z() 612 val B6 = Imm_B6() 613 val OPIVIS = Imm_OPIVIS() 614 val OPIVIU = Imm_OPIVIU() 615 val VSETVLI = Imm_VSETVLI() 616 val VSETIVLI = Imm_VSETIVLI() 617 618 val imms = Seq(I, S, B, U, J, Z, B6, OPIVIS, OPIVIU, VSETVLI, VSETIVLI) 619 val maxLen = imms.maxBy(_.len).len 620 val immSelMap = Seq( 621 SelImm.IMM_I, 622 SelImm.IMM_S, 623 SelImm.IMM_SB, 624 SelImm.IMM_U, 625 SelImm.IMM_UJ, 626 SelImm.IMM_Z, 627 SelImm.IMM_B6, 628 SelImm.IMM_OPIVIS, 629 SelImm.IMM_OPIVIU, 630 SelImm.IMM_VSETVLI, 631 SelImm.IMM_VSETIVLI 632 ).zip(imms) 633 println(s"ImmUnion max len: $maxLen") 634} 635 636case class Imm_LUI_LOAD() { 637 def immFromLuiLoad(lui_imm: UInt, load_imm: UInt): UInt = { 638 val loadImm = load_imm(Imm_I().len - 1, 0) 639 Cat(lui_imm(Imm_U().len - loadImm.getWidth - 1, 0), loadImm) 640 } 641 def getLuiImm(uop: DynInst): UInt = { 642 val loadImmLen = Imm_I().len 643 val imm_u = Cat(uop.psrc(1), uop.psrc(0), uop.imm(ImmUnion.maxLen - 1, loadImmLen)) 644 Imm_U().do_toImm32(imm_u) 645 } 646} 647 648/** 649 * IO bundle for the Decode unit 650 */ 651class DecodeUnitIO(implicit p: Parameters) extends XSBundle { 652 val enq = new Bundle { 653 val ctrlFlow = Input(new StaticInst) 654 val vtype = Input(new VType) 655 } 656// val vconfig = Input(UInt(XLEN.W)) 657 val deq = new Bundle { 658 val decodedInst = Output(new DecodedInst) 659 val isComplex = Output(Bool()) 660 val uopInfo = Output(new UopInfo) 661 } 662 val csrCtrl = Input(new CustomCSRCtrlIO) 663} 664 665/** 666 * Decode unit that takes in a single CtrlFlow and generates a CfCtrl. 667 */ 668class DecodeUnit(implicit p: Parameters) extends XSModule with DecodeUnitConstants { 669 val io = IO(new DecodeUnitIO) 670 671 val ctrl_flow = io.enq.ctrlFlow // input with RVC Expanded 672 673 private val inst: XSInstBitFields = io.enq.ctrlFlow.instr.asTypeOf(new XSInstBitFields) 674 675 val decode_table: Array[(BitPat, List[BitPat])] = XDecode.table ++ 676 FpDecode.table ++ 677 FDivSqrtDecode.table ++ 678 X64Decode.table ++ 679 XSTrapDecode.table ++ 680 BDecode.table ++ 681 CBODecode.table ++ 682 SvinvalDecode.table ++ 683 VecDecoder.table 684 685 require(decode_table.map(_._2.length == 15).reduce(_ && _), "Decode tables have different column size") 686 // assertion for LUI: only LUI should be assigned `selImm === SelImm.IMM_U && fuType === FuType.alu` 687 val luiMatch = (t: Seq[BitPat]) => t(3).value == FuType.alu && t.reverse.head.value == SelImm.IMM_U.litValue 688 val luiTable = decode_table.filter(t => luiMatch(t._2)).map(_._1).distinct 689 assert(luiTable.length == 1 && luiTable.head == LUI, "Conflicts: LUI is determined by FuType and SelImm in Dispatch") 690 691 // output 692 val decodedInst: DecodedInst = Wire(new DecodedInst()).decode(ctrl_flow.instr, decode_table) 693 694 val fpDecoder = Module(new FPDecoder) 695 fpDecoder.io.instr := ctrl_flow.instr 696 decodedInst.fpu := fpDecoder.io.fpCtrl 697 698 decodedInst.connectStaticInst(io.enq.ctrlFlow) 699 700 decodedInst.uopIdx := 0.U 701 decodedInst.firstUop := true.B 702 decodedInst.lastUop := true.B 703 decodedInst.numUops := 1.U 704 705 val isMove = BitPat("b000000000000_?????_000_?????_0010011") === ctrl_flow.instr 706 decodedInst.isMove := isMove && inst.RD =/= 0.U 707 708 private val v0Idx = 0 709 private val vconfigIdx = VCONFIG_IDX 710 711 // read src1~3 location 712 decodedInst.lsrc(0) := inst.RS1 713 decodedInst.lsrc(1) := inst.RS2 714 decodedInst.lsrc(2) := inst.FS3 715 decodedInst.lsrc(3) := v0Idx.U 716 decodedInst.lsrc(4) := vconfigIdx.U 717 decodedInst.srcType(3) := Mux(inst.VM.asBool, SrcType.DC, SrcType.vp) // mask src 718 decodedInst.srcType(4) := SrcType.vp // vconfig 719 720 // cs.lsrc(2) := Mux(FuType.isVecExu(cs.fuType), ctrl_flow.instr(RD_MSB, RD_LSB), ctrl_flow.instr(RS3_MSB, RS3_LSB)) 721 // read dest location 722 decodedInst.ldest := inst.RD 723 724 // fill in exception vector 725 val vecException = Module(new VecExceptionGen) 726 vecException.io.inst := io.enq.ctrlFlow.instr 727 vecException.io.decodedInst := decodedInst 728 vecException.io.vtype := io.enq.vtype 729 730 decodedInst.exceptionVec(illegalInstr) := decodedInst.selImm === SelImm.INVALID_INSTR || vecException.io.illegalInst 731 732 when (!io.csrCtrl.svinval_enable) { 733 val base_ii = decodedInst.selImm === SelImm.INVALID_INSTR || vecException.io.illegalInst 734 val sinval = BitPat("b0001011_?????_?????_000_00000_1110011") === ctrl_flow.instr 735 val w_inval = BitPat("b0001100_00000_00000_000_00000_1110011") === ctrl_flow.instr 736 val inval_ir = BitPat("b0001100_00001_00000_000_00000_1110011") === ctrl_flow.instr 737 val svinval_ii = sinval || w_inval || inval_ir 738 decodedInst.exceptionVec(illegalInstr) := base_ii || svinval_ii 739 decodedInst.flushPipe := false.B 740 } 741 742 // fix frflags 743 // fflags zero csrrs rd csr 744 val isFrflags = BitPat("b000000000001_00000_010_?????_1110011") === ctrl_flow.instr 745 when (decodedInst.fuType === FuType.csr.U && isFrflags) { 746 decodedInst.blockBackward := false.B 747 } 748 749 decodedInst.imm := LookupTree(decodedInst.selImm, ImmUnion.immSelMap.map( 750 x => { 751 val minBits = x._2.minBitsFromInstr(ctrl_flow.instr) 752 require(minBits.getWidth == x._2.len) 753 x._1 -> minBits 754 } 755 )) 756 757 decodedInst.commitType := 0.U // Todo: remove it 758 759 decodedInst.isVset := FuType.isVset(decodedInst.fuType) 760 761 private val needReverseInsts = Seq(VRSUB_VI, VRSUB_VX, VREM_VV, VREM_VX, VREMU_VV, VFRDIV_VF, VFRSUB_VF) 762 private val vextInsts = Seq(VZEXT_VF2, VZEXT_VF4, VZEXT_VF8, VSEXT_VF2, VSEXT_VF4, VSEXT_VF8) 763 private val narrowInsts = Seq( 764 VNSRA_WV, VNSRA_WX, VNSRA_WI, VNSRL_WV, VNSRL_WX, VNSRL_WI, 765 VNCLIP_WV, VNCLIP_WX, VNCLIP_WI, VNCLIPU_WV, VNCLIPU_WX, VNCLIPU_WI, 766 ) 767 private val maskDstInsts = Seq( 768 VMADC_VV, VMADC_VX, VMADC_VI, VMADC_VVM, VMADC_VXM, VMADC_VIM, 769 VMSBC_VV, VMSBC_VX, VMSBC_VVM, VMSBC_VXM, 770 VMAND_MM, VMNAND_MM, VMANDN_MM, VMXOR_MM, VMOR_MM, VMNOR_MM, VMORN_MM, VMXNOR_MM, 771 VMSEQ_VV, VMSEQ_VX, VMSEQ_VI, VMSNE_VV, VMSNE_VX, VMSNE_VI, 772 VMSLE_VV, VMSLE_VX, VMSLE_VI, VMSLEU_VV, VMSLEU_VX, VMSLEU_VI, 773 VMSLT_VV, VMSLT_VX, VMSLTU_VV, VMSLTU_VX, 774 VMSGT_VX, VMSGT_VI, VMSGTU_VX, VMSGTU_VI, 775 VMFEQ_VV, VMFEQ_VF, VMFNE_VV, VMFNE_VF, VMFLT_VV, VMFLT_VF, VMFLE_VV, VMFLE_VF, VMFGT_VF, VMFGE_VF, 776 ) 777 778 decodedInst.vpu := 0.U.asTypeOf(decodedInst.vpu) // Todo: Connect vpu decoder 779 decodedInst.vpu.vill := io.enq.vtype.illegal 780 decodedInst.vpu.vma := io.enq.vtype.vma 781 decodedInst.vpu.vta := io.enq.vtype.vta 782 decodedInst.vpu.vsew := io.enq.vtype.vsew 783 decodedInst.vpu.vlmul := io.enq.vtype.vlmul 784 decodedInst.vpu.vm := inst.VM 785 decodedInst.vpu.nf := inst.NF 786 decodedInst.vpu.needScalaSrc := Category.needScalaSrc(inst.VCATEGORY) 787 decodedInst.vpu.permImmTruncate := Category.permImmTruncate(inst.VCATEGORY) 788 decodedInst.vpu.isReverse := needReverseInsts.map(_ === inst.ALL).reduce(_ || _) 789 decodedInst.vpu.isExt := vextInsts.map(_ === inst.ALL).reduce(_ || _) 790 decodedInst.vpu.isNarrow := narrowInsts.map(_ === inst.ALL).reduce(_ || _) 791 decodedInst.vpu.isDstMask := maskDstInsts.map(_ === inst.ALL).reduce(_ || _) 792 793 val uopInfoGen = Module(new UopInfoGen) 794 uopInfoGen.io.in.preInfo.typeOfSplit := decodedInst.uopSplitType 795 uopInfoGen.io.in.preInfo.vsew := decodedInst.vpu.vsew 796 uopInfoGen.io.in.preInfo.vlmul := decodedInst.vpu.vlmul 797 uopInfoGen.io.in.preInfo.vwidth := inst.RM 798 io.deq.isComplex := uopInfoGen.io.out.isComplex 799 io.deq.uopInfo.numOfUop := uopInfoGen.io.out.uopInfo.numOfUop 800 io.deq.uopInfo.lmul := uopInfoGen.io.out.uopInfo.lmul 801 802 io.deq.decodedInst := decodedInst 803 804 //------------------------------------------------------------- 805 // Debug Info 806// XSDebug("in: instr=%x pc=%x excepVec=%b crossPageIPFFix=%d\n", 807// io.enq.ctrl_flow.instr, io.enq.ctrl_flow.pc, io.enq.ctrl_flow.exceptionVec.asUInt, 808// io.enq.ctrl_flow.crossPageIPFFix) 809// 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", 810// io.deq.cf_ctrl.ctrl.srcType(0), io.deq.cf_ctrl.ctrl.srcType(1), io.deq.cf_ctrl.ctrl.srcType(2), 811// io.deq.cf_ctrl.ctrl.lsrc(0), io.deq.cf_ctrl.ctrl.lsrc(1), io.deq.cf_ctrl.ctrl.lsrc(2), 812// io.deq.cf_ctrl.ctrl.ldest, io.deq.cf_ctrl.ctrl.fuType, io.deq.cf_ctrl.ctrl.fuOpType) 813// XSDebug("out: rfWen=%d fpWen=%d isXSTrap=%d noSpecExec=%d isBlocked=%d flushPipe=%d imm=%x\n", 814// io.deq.cf_ctrl.ctrl.rfWen, io.deq.cf_ctrl.ctrl.fpWen, io.deq.cf_ctrl.ctrl.isXSTrap, 815// io.deq.cf_ctrl.ctrl.noSpecExec, io.deq.cf_ctrl.ctrl.blockBackward, io.deq.cf_ctrl.ctrl.flushPipe, 816// io.deq.cf_ctrl.ctrl.imm) 817// XSDebug("out: excepVec=%b\n", io.deq.cf_ctrl.cf.exceptionVec.asUInt) 818} 819