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.util.{UIntIsOneOf, uintToBitPat} 23import xiangshan._ 24import utils._ 25import xiangshan.backend._ 26import xiangshan.backend.decode.BDecode.{N, Y} 27import xiangshan.backend.decode.Instructions._ 28 29/** 30 * Abstract trait giving defaults and other relevant values to different Decode constants/ 31 */ 32abstract trait DecodeConstants { 33 def X = BitPat("b?") 34 def N = BitPat("b0") 35 def Y = BitPat("b1") 36 37 def decodeDefault: List[BitPat] = // illegal instruction 38 // srcType(0) srcType(1) srcType(2) fuType fuOpType rfWen 39 // | | | | | | fpWen 40 // | | | | | | | isXSTrap 41 // | | | | | | | | noSpecExec 42 // | | | | | | | | | blockBackward 43 // | | | | | | | | | | flushPipe 44 // | | | | | | | | | | | isRVF 45 // | | | | | | | | | | | | selImm 46 List(SrcType.DC, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.sll, N, N, N, N, N, N, N, SelImm.INVALID_INSTR) // Use SelImm to indicate invalid instr 47 48 val table: Array[(BitPat, List[BitPat])] 49} 50 51trait DecodeUnitConstants 52{ 53 // abstract out instruction decode magic numbers 54 val RD_MSB = 11 55 val RD_LSB = 7 56 val RS1_MSB = 19 57 val RS1_LSB = 15 58 val RS2_MSB = 24 59 val RS2_LSB = 20 60 val RS3_MSB = 31 61 val RS3_LSB = 27 62} 63 64/** 65 * Decoded control signals 66 * See xiangshan/package.scala, xiangshan/backend/package.scala, Bundle.scala 67 */ 68 69/** 70 * Decode constants for RV64 71 */ 72object X64Decode extends DecodeConstants { 73 val table: Array[(BitPat, List[BitPat])] = Array( 74 LD -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.ld, Y, N, N, N, N, N, N, SelImm.IMM_I), 75 LWU -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lwu, Y, N, N, N, N, N, N, SelImm.IMM_I), 76 SD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.stu, LSUOpType.sd, N, N, N, N, N, N, N, SelImm.IMM_S), 77 78 SLLI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sll, Y, N, N, N, N, N, N, SelImm.IMM_I), 79 SRLI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.srl, Y, N, N, N, N, N, N, SelImm.IMM_I), 80 SRAI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sra, Y, N, N, N, N, N, N, SelImm.IMM_I), 81 82 ADDIW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.addw, Y, N, N, N, N, N, N, SelImm.IMM_I), 83 SLLIW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sllw, Y, N, N, N, N, N, N, SelImm.IMM_I), 84 SRAIW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sraw, Y, N, N, N, N, N, N, SelImm.IMM_I), 85 SRLIW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.srlw, Y, N, N, N, N, N, N, SelImm.IMM_I), 86 87 ADDW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.addw, Y, N, N, N, N, N, N, SelImm.IMM_X), 88 SUBW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.subw, Y, N, N, N, N, N, N, SelImm.IMM_X), 89 SLLW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sllw, Y, N, N, N, N, N, N, SelImm.IMM_X), 90 SRAW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sraw, Y, N, N, N, N, N, N, SelImm.IMM_X), 91 SRLW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.srlw, Y, N, N, N, N, N, N, SelImm.IMM_X), 92 93 RORW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.rorw, Y, N, N, N, N, N, N, SelImm.IMM_X), 94 RORIW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.rorw, Y, N, N, N, N, N, N, SelImm.IMM_I), 95 ROLW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.rolw, Y, N, N, N, N, N, N, SelImm.IMM_X) 96 ) 97} 98 99/** 100 * Overall Decode constants 101 */ 102object XDecode extends DecodeConstants { 103 val table: Array[(BitPat, List[BitPat])] = Array( 104 LW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lw, Y, N, N, N, N, N, N, SelImm.IMM_I), 105 LH -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lh, Y, N, N, N, N, N, N, SelImm.IMM_I), 106 LHU -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lhu, Y, N, N, N, N, N, N, SelImm.IMM_I), 107 LB -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lb, Y, N, N, N, N, N, N, SelImm.IMM_I), 108 LBU -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lbu, Y, N, N, N, N, N, N, SelImm.IMM_I), 109 110 SW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.stu, LSUOpType.sw, N, N, N, N, N, N, N, SelImm.IMM_S), 111 SH -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.stu, LSUOpType.sh, N, N, N, N, N, N, N, SelImm.IMM_S), 112 SB -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.stu, LSUOpType.sb, N, N, N, N, N, N, N, SelImm.IMM_S), 113 114 LUI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.add, Y, N, N, N, N, N, N, SelImm.IMM_U), 115 116 ADDI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.add, Y, N, N, N, N, N, N, SelImm.IMM_I), 117 ANDI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.and, Y, N, N, N, N, N, N, SelImm.IMM_I), 118 ORI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.or, Y, N, N, N, N, N, N, SelImm.IMM_I), 119 XORI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.xor, Y, N, N, N, N, N, N, SelImm.IMM_I), 120 SLTI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.slt, Y, N, N, N, N, N, N, SelImm.IMM_I), 121 SLTIU -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sltu, Y, N, N, N, N, N, N, SelImm.IMM_I), 122 123 SLL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sll, Y, N, N, N, N, N, N, SelImm.IMM_X), 124 ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.add, Y, N, N, N, N, N, N, SelImm.IMM_X), 125 SUB -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sub, Y, N, N, N, N, N, N, SelImm.IMM_X), 126 SLT -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.slt, Y, N, N, N, N, N, N, SelImm.IMM_X), 127 SLTU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sltu, Y, N, N, N, N, N, N, SelImm.IMM_X), 128 AND -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.and, Y, N, N, N, N, N, N, SelImm.IMM_X), 129 OR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.or, Y, N, N, N, N, N, N, SelImm.IMM_X), 130 XOR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.xor, Y, N, N, N, N, N, N, SelImm.IMM_X), 131 SRA -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sra, Y, N, N, N, N, N, N, SelImm.IMM_X), 132 SRL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.srl, Y, N, N, N, N, N, N, SelImm.IMM_X), 133 134 MUL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mul, MDUOpType.mul, Y, N, N, N, N, N, N, SelImm.IMM_X), 135 MULH -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mul, MDUOpType.mulh, Y, N, N, N, N, N, N, SelImm.IMM_X), 136 MULHU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mul, MDUOpType.mulhu, Y, N, N, N, N, N, N, SelImm.IMM_X), 137 MULHSU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mul, MDUOpType.mulhsu, Y, N, N, N, N, N, N, SelImm.IMM_X), 138 MULW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mul, MDUOpType.mulw, Y, N, N, N, N, N, N, SelImm.IMM_X), 139 140 DIV -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.div, Y, N, N, N, N, N, N, SelImm.IMM_X), 141 DIVU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.divu, Y, N, N, N, N, N, N, SelImm.IMM_X), 142 REM -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.rem, Y, N, N, N, N, N, N, SelImm.IMM_X), 143 REMU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.remu, Y, N, N, N, N, N, N, SelImm.IMM_X), 144 DIVW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.divw, Y, N, N, N, N, N, N, SelImm.IMM_X), 145 DIVUW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.divuw, Y, N, N, N, N, N, N, SelImm.IMM_X), 146 REMW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.remw, Y, N, N, N, N, N, N, SelImm.IMM_X), 147 REMUW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.div, MDUOpType.remuw, Y, N, N, N, N, N, N, SelImm.IMM_X), 148 149 AUIPC -> List(SrcType.pc , SrcType.imm, SrcType.DC, FuType.jmp, JumpOpType.auipc, Y, N, N, N, N, N, N, SelImm.IMM_U), 150 JAL -> List(SrcType.pc , SrcType.imm, SrcType.DC, FuType.jmp, JumpOpType.jal, Y, N, N, N, N, N, N, SelImm.IMM_UJ), 151 JALR -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.jmp, JumpOpType.jalr, Y, N, N, N, N, N, N, SelImm.IMM_I), 152 BEQ -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.beq, N, N, N, N, N, N, N, SelImm.IMM_SB), 153 BNE -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bne, N, N, N, N, N, N, N, SelImm.IMM_SB), 154 BGE -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bge, N, N, N, N, N, N, N, SelImm.IMM_SB), 155 BGEU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bgeu, N, N, N, N, N, N, N, SelImm.IMM_SB), 156 BLT -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.blt, N, N, N, N, N, N, N, SelImm.IMM_SB), 157 BLTU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bltu, N, N, N, N, N, N, N, SelImm.IMM_SB), 158 159 // I-type, the immediate12 holds the CSR register. 160 CSRRW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.wrt, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 161 CSRRS -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.set, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 162 CSRRC -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.clr, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 163 164 CSRRWI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.wrti, Y, N, N, Y, Y, N, N, SelImm.IMM_Z), 165 CSRRSI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.seti, Y, N, N, Y, Y, N, N, SelImm.IMM_Z), 166 CSRRCI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.clri, Y, N, N, Y, Y, N, N, SelImm.IMM_Z), 167 168 SFENCE_VMA->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.fence, FenceOpType.sfence, N, N, N, Y, Y, Y, N, SelImm.IMM_X), 169 EBREAK -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 170 ECALL -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 171 SRET -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 172 MRET -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 173 DRET -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 174 175 WFI -> List(SrcType.pc, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sll, Y, N, N, N, N, N, N, SelImm.IMM_X), 176 177 FENCE_I -> List(SrcType.pc, SrcType.imm, SrcType.DC, FuType.fence, FenceOpType.fencei, N, N, N, Y, Y, Y, N, SelImm.IMM_X), 178 FENCE -> List(SrcType.pc, SrcType.imm, SrcType.DC, FuType.fence, FenceOpType.fence, N, N, N, Y, Y, Y, N, SelImm.IMM_X), 179 180 // A-type 181 AMOADD_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoadd_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 182 AMOXOR_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoxor_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 183 AMOSWAP_W->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoswap_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 184 AMOAND_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoand_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 185 AMOOR_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoor_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 186 AMOMIN_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomin_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 187 AMOMINU_W->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amominu_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 188 AMOMAX_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomax_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 189 AMOMAXU_W->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomaxu_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 190 191 AMOADD_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoadd_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 192 AMOXOR_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoxor_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 193 AMOSWAP_D->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoswap_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 194 AMOAND_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoand_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 195 AMOOR_D -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoor_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 196 AMOMIN_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomin_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 197 AMOMINU_D->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amominu_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 198 AMOMAX_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomax_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 199 AMOMAXU_D->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomaxu_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 200 201 LR_W -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.mou, LSUOpType.lr_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 202 LR_D -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.mou, LSUOpType.lr_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 203 SC_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.sc_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 204 SC_D -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.sc_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 205 206 ANDN -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.andn, Y, N, N, N, N, N, N, SelImm.IMM_X), 207 ORN -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.orn, Y, N, N, N, N, N, N, SelImm.IMM_X), 208 XNOR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.xnor, Y, N, N, N, N, N, N, SelImm.IMM_X), 209 ORC_B -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.orcb, Y, N, N, N, N, N, N, SelImm.IMM_X), 210 211 MIN -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.min, Y, N, N, N, N, N, N, SelImm.IMM_X), 212 MINU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.minu, Y, N, N, N, N, N, N, SelImm.IMM_X), 213 MAX -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.max, Y, N, N, N, N, N, N, SelImm.IMM_X), 214 MAXU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.maxu, Y, N, N, N, N, N, N, SelImm.IMM_X), 215 216 SEXT_B -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.sextb, Y, N, N, N, N, N, N, SelImm.IMM_X), 217 PACKH -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.packh, Y, N, N, N, N, N, N, SelImm.IMM_X), 218 SEXT_H -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.sexth, Y, N, N, N, N, N, N, SelImm.IMM_X), 219 PACKW -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.packw, Y, N, N, N, N, N, N, SelImm.IMM_X), 220 REVB -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.revb, Y, N, N, N, N, N, N, SelImm.IMM_X), 221 REV8 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.rev8, Y, N, N, N, N, N, N, SelImm.IMM_X), 222 PACK -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.pack, Y, N, N, N, N, N, N, SelImm.IMM_X), 223 224 BSET -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bset, Y, N, N, N, N, N, N, SelImm.IMM_X), 225 BSETI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.bset, Y, N, N, N, N, N, N, SelImm.IMM_I), 226 BCLR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bclr, Y, N, N, N, N, N, N, SelImm.IMM_X), 227 BCLRI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.bclr, Y, N, N, N, N, N, N, SelImm.IMM_I), 228 BINV -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.binv, Y, N, N, N, N, N, N, SelImm.IMM_X), 229 BINVI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.binv, Y, N, N, N, N, N, N, SelImm.IMM_I), 230 BEXT -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bext, Y, N, N, N, N, N, N, SelImm.IMM_X), 231 BEXTI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.bext, Y, N, N, N, N, N, N, SelImm.IMM_I), 232 233 ROR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.ror, Y, N, N, N, N, N, N, SelImm.IMM_X), 234 RORI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.ror, Y, N, N, N, N, N, N, SelImm.IMM_I), 235 ROL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.rol, Y, N, N, N, N, N, N, SelImm.IMM_X), 236 237 SH1ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh1add, Y, N, N, N, N, N, N, SelImm.IMM_X), 238 SH2ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh2add, Y, N, N, N, N, N, N, SelImm.IMM_X), 239 SH3ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh3add, Y, N, N, N, N, N, N, SelImm.IMM_X), 240 SH1ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh1adduw, Y, N, N, N, N, N, N, SelImm.IMM_X), 241 SH2ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh2adduw, Y, N, N, N, N, N, N, SelImm.IMM_X), 242 SH3ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh3adduw, Y, N, N, N, N, N, N, SelImm.IMM_X), 243 ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.adduw, Y, N, N, N, N, N, N, SelImm.IMM_X), 244 SLLIU_W -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.slliuw, Y, N, N, N, N, N, N, SelImm.IMM_I) 245 ) 246} 247 248/** 249 * FP Decode constants 250 */ 251object FDecode extends DecodeConstants{ 252 val table: Array[(BitPat, List[BitPat])] = Array( 253 254 FLW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lw, N, Y, N, N, N, N, Y, SelImm.IMM_I), 255 FLD -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.ld, N, Y, N, N, N, N, N, SelImm.IMM_I), 256 FSW -> List(SrcType.reg, SrcType.fp, SrcType.DC, FuType.stu, LSUOpType.sw, N, N, N, N, N, N, Y, SelImm.IMM_S), 257 FSD -> List(SrcType.reg, SrcType.fp, SrcType.DC, FuType.stu, LSUOpType.sd, N, N, N, N, N, N, N, SelImm.IMM_S), 258 259 FCLASS_S-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 260 FCLASS_D-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 261 262 FMV_D_X -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 263 FMV_X_D -> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 264 FMV_X_W -> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 265 FMV_W_X -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 266 267 FSGNJ_S -> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 268 FSGNJ_D -> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 269 FSGNJX_S-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 270 FSGNJX_D-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 271 FSGNJN_S-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 272 FSGNJN_D-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 273 274 // FP to FP 275 FCVT_S_D-> List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 276 FCVT_D_S-> List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 277 278 // Int to FP 279 FCVT_S_W-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 280 FCVT_S_WU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 281 FCVT_S_L-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 282 FCVT_S_LU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 283 284 FCVT_D_W-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 285 FCVT_D_WU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 286 FCVT_D_L-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 287 FCVT_D_LU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 288 289 // FP to Int 290 FCVT_W_S-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 291 FCVT_WU_S->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 292 FCVT_L_S-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 293 FCVT_LU_S->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 294 295 FCVT_W_D-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 296 FCVT_WU_D->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 297 FCVT_L_D-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 298 FCVT_LU_D->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 299 300 // "fp_single" is used for wb_data formatting (and debugging) 301 FEQ_S ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 302 FLT_S ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 303 FLE_S ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 304 305 FEQ_D ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 306 FLT_D ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 307 FLE_D ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 308 309 FMIN_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 310 FMAX_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 311 FMIN_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 312 FMAX_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 313 314 FADD_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 315 FSUB_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 316 FMUL_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 317 FADD_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 318 FSUB_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 319 FMUL_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 320 321 FMADD_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 322 FMSUB_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 323 FNMADD_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 324 FNMSUB_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 325 FMADD_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 326 FMSUB_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 327 FNMADD_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 328 FNMSUB_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X) 329 ) 330} 331 332/** 333 * Bit Manipulation Decode 334 */ 335object BDecode extends DecodeConstants{ 336 val table: Array[(BitPat, List[BitPat])] = Array( 337 // Basic bit manipulation 338 CLZ -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.clz, Y, N, N, N, N, N, N, SelImm.IMM_X), 339 CTZ -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.ctz, Y, N, N, N, N, N, N, SelImm.IMM_X), 340 CPOP -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.cpop, Y, N, N, N, N, N, N, SelImm.IMM_X), 341 XPERM_B -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.xpermb, Y, N, N, N, N, N, N, SelImm.IMM_X), 342 XPERM_N -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.xpermn, Y, N, N, N, N, N, N, SelImm.IMM_X), 343 344 CLZW -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.clzw, Y, N, N, N, N, N, N, SelImm.IMM_X), 345 CTZW -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.ctzw, Y, N, N, N, N, N, N, SelImm.IMM_X), 346 CPOPW -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.cpopw, Y, N, N, N, N, N, N, SelImm.IMM_X), 347 348 CLMUL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.clmul, Y, N, N, N, N, N, N, SelImm.IMM_X), 349 CLMULH -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.clmulh, Y, N, N, N, N, N, N, SelImm.IMM_X), 350 CLMULR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.clmulr, Y, N, N, N, N, N, N, SelImm.IMM_X), 351 352 AES64ES -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.aes64es, Y, N, N, N, N, N, N, SelImm.IMM_X), 353 AES64ESM -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.aes64esm, Y, N, N, N, N, N, N, SelImm.IMM_X), 354 AES64DS -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.aes64ds, Y, N, N, N, N, N, N, SelImm.IMM_X), 355 AES64DSM -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.aes64dsm, Y, N, N, N, N, N, N, SelImm.IMM_X), 356 AES64IM -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.aes64im, Y, N, N, N, N, N, N, SelImm.IMM_X), 357 AES64KS1I -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.bku, BKUOpType.aes64ks1i, Y, N, N, N, N, N, N, SelImm.IMM_I), 358 AES64KS2 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.aes64ks2, Y, N, N, N, N, N, N, SelImm.IMM_X), 359 SHA256SUM0 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha256sum0, Y, N, N, N, N, N, N, SelImm.IMM_X), 360 SHA256SUM1 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha256sum1, Y, N, N, N, N, N, N, SelImm.IMM_X), 361 SHA256SIG0 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha256sig0, Y, N, N, N, N, N, N, SelImm.IMM_X), 362 SHA256SIG1 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha256sig1, Y, N, N, N, N, N, N, SelImm.IMM_X), 363 SHA512SUM0 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha512sum0, Y, N, N, N, N, N, N, SelImm.IMM_X), 364 SHA512SUM1 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha512sum1, Y, N, N, N, N, N, N, SelImm.IMM_X), 365 SHA512SIG0 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha512sig0, Y, N, N, N, N, N, N, SelImm.IMM_X), 366 SHA512SIG1 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sha512sig1, Y, N, N, N, N, N, N, SelImm.IMM_X), 367 SM3P0 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sm3p0, Y, N, N, N, N, N, N, SelImm.IMM_X), 368 SM3P1 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bku, BKUOpType.sm3p1, Y, N, N, N, N, N, N, SelImm.IMM_X), 369 SM4KS0 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ks0, Y, N, N, N, N, N, N, SelImm.IMM_X), 370 SM4KS1 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ks1, Y, N, N, N, N, N, N, SelImm.IMM_X), 371 SM4KS2 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ks2, Y, N, N, N, N, N, N, SelImm.IMM_X), 372 SM4KS3 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ks3, Y, N, N, N, N, N, N, SelImm.IMM_X), 373 SM4ED0 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ed0, Y, N, N, N, N, N, N, SelImm.IMM_X), 374 SM4ED1 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ed1, Y, N, N, N, N, N, N, SelImm.IMM_X), 375 SM4ED2 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ed2, Y, N, N, N, N, N, N, SelImm.IMM_X), 376 SM4ED3 -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bku, BKUOpType.sm4ed3, Y, N, N, N, N, N, N, SelImm.IMM_X), 377 ) 378} 379 380/** 381 * FP Divide SquareRoot Constants 382 */ 383object FDivSqrtDecode extends DecodeConstants { 384 val table: Array[(BitPat, List[BitPat])] = Array( 385 FDIV_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 386 FDIV_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 387 FSQRT_S ->List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 388 FSQRT_D ->List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X) 389 ) 390} 391 392/** 393 * XiangShan Trap Decode constants 394 */ 395object XSTrapDecode extends DecodeConstants { 396 // calculate as ADDI => addi zero, a0, 0 397 // replace rs '?????' with '01010'(a0) in decode stage 398 def lsrc1 = "b01010".U // $a0 399 val table: Array[(BitPat, List[BitPat])] = Array( 400 TRAP -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.add, Y, N, Y, Y, Y, N, N, SelImm.IMM_I) 401 ) 402} 403 404//object Imm32Gen { 405// def apply(sel: UInt, inst: UInt) = { 406// val sign = Mux(sel === SelImm.IMM_Z, 0.S, inst(31).asSInt) 407// val b30_20 = Mux(sel === SelImm.IMM_U, inst(30,20).asSInt, sign) 408// val b19_12 = Mux(sel =/= SelImm.IMM_U && sel =/= SelImm.IMM_UJ, sign, inst(19,12).asSInt) 409// val b11 = Mux(sel === SelImm.IMM_U || sel === SelImm.IMM_Z, 0.S, 410// Mux(sel === SelImm.IMM_UJ, inst(20).asSInt, 411// Mux(sel === SelImm.IMM_SB, inst(7).asSInt, sign))) 412// val b10_5 = Mux(sel === SelImm.IMM_U || sel === SelImm.IMM_Z, 0.U(1.W), inst(30,25)) 413// val b4_1 = Mux(sel === SelImm.IMM_U, 0.U(1.W), 414// Mux(sel === SelImm.IMM_S || sel === SelImm.IMM_SB, inst(11,8), 415// Mux(sel === SelImm.IMM_Z, inst(19,16), inst(24,21)))) 416// val b0 = Mux(sel === SelImm.IMM_S, inst(7), 417// Mux(sel === SelImm.IMM_I, inst(20), 418// Mux(sel === SelImm.IMM_Z, inst(15), 0.U(1.W)))) 419// 420// Cat(sign, b30_20, b19_12, b11, b10_5, b4_1, b0) 421// } 422//} 423 424abstract class Imm(val len: Int) extends Bundle { 425 def toImm32(minBits: UInt): UInt = do_toImm32(minBits(len - 1, 0)) 426 def do_toImm32(minBits: UInt): UInt 427 def minBitsFromInstr(instr: UInt): UInt 428} 429 430case class Imm_I() extends Imm(12) { 431 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 432 433 override def minBitsFromInstr(instr: UInt): UInt = 434 Cat(instr(31, 20)) 435} 436 437case class Imm_S() extends Imm(12) { 438 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 439 440 override def minBitsFromInstr(instr: UInt): UInt = 441 Cat(instr(31, 25), instr(11, 7)) 442} 443 444case class Imm_B() extends Imm(12) { 445 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 446 447 override def minBitsFromInstr(instr: UInt): UInt = 448 Cat(instr(31), instr(7), instr(30, 25), instr(11, 8)) 449} 450 451case class Imm_U() extends Imm(20){ 452 override def do_toImm32(minBits: UInt): UInt = Cat(minBits, 0.U(12.W)) 453 454 override def minBitsFromInstr(instr: UInt): UInt = { 455 instr(31, 12) 456 } 457} 458 459case class Imm_J() extends Imm(20){ 460 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 461 462 override def minBitsFromInstr(instr: UInt): UInt = { 463 Cat(instr(31), instr(19, 12), instr(20), instr(30, 25), instr(24, 21)) 464 } 465} 466 467case class Imm_Z() extends Imm(12 + 5){ 468 override def do_toImm32(minBits: UInt): UInt = minBits 469 470 override def minBitsFromInstr(instr: UInt): UInt = { 471 Cat(instr(19, 15), instr(31, 20)) 472 } 473} 474 475case class Imm_B6() extends Imm(6){ 476 override def do_toImm32(minBits: UInt): UInt = ZeroExt(minBits, 32) 477 478 override def minBitsFromInstr(instr: UInt): UInt = { 479 instr(25, 20) 480 } 481} 482 483object ImmUnion { 484 val I = Imm_I() 485 val S = Imm_S() 486 val B = Imm_B() 487 val U = Imm_U() 488 val J = Imm_J() 489 val Z = Imm_Z() 490 val B6 = Imm_B6() 491 val imms = Seq(I, S, B, U, J, Z, B6) 492 val maxLen = imms.maxBy(_.len).len 493 val immSelMap = Seq( 494 SelImm.IMM_I, 495 SelImm.IMM_S, 496 SelImm.IMM_SB, 497 SelImm.IMM_U, 498 SelImm.IMM_UJ, 499 SelImm.IMM_Z, 500 SelImm.IMM_B6 501 ).zip(imms) 502 println(s"ImmUnion max len: $maxLen") 503} 504 505 506/** 507 * IO bundle for the Decode unit 508 */ 509class DecodeUnitIO(implicit p: Parameters) extends XSBundle { 510 val enq = new Bundle { val ctrl_flow = Input(new CtrlFlow) } 511 val deq = new Bundle { val cf_ctrl = Output(new CfCtrl) } 512} 513 514/** 515 * Decode unit that takes in a single CtrlFlow and generates a CfCtrl. 516 */ 517class DecodeUnit(implicit p: Parameters) extends XSModule with DecodeUnitConstants { 518 val io = IO(new DecodeUnitIO) 519 520 val ctrl_flow = Wire(new CtrlFlow) // input with RVC Expanded 521 val cf_ctrl = Wire(new CfCtrl) 522 523 ctrl_flow := io.enq.ctrl_flow 524 525 val decode_table = XDecode.table ++ FDecode.table ++ FDivSqrtDecode.table ++ X64Decode.table ++ XSTrapDecode.table ++ BDecode.table 526 527 // output 528 cf_ctrl.cf := ctrl_flow 529 val cs = Wire(new CtrlSignals()).decode(ctrl_flow.instr, decode_table) 530 cs.singleStep := false.B 531 cs.replayInst := false.B 532 cs.isSoftPrefetchRead := false.B 533 cs.isSoftPrefetchWrite := false.B 534 535 cs.isFused := 0.U 536 537 val fpDecoder = Module(new FPDecoder) 538 fpDecoder.io.instr := ctrl_flow.instr 539 cs.fpu := fpDecoder.io.fpCtrl 540 541 val isMove = BitPat("b000000000000_?????_000_?????_0010011") === ctrl_flow.instr 542 cs.isMove := isMove 543 544 // read src1~3 location 545 cs.lsrc(0) := Mux(ctrl_flow.instr === LUI, 0.U,ctrl_flow.instr(RS1_MSB,RS1_LSB)) 546 cs.lsrc(1) := ctrl_flow.instr(RS2_MSB,RS2_LSB) 547 cs.lsrc(2) := ctrl_flow.instr(RS3_MSB,RS3_LSB) 548 // read dest location 549 cs.ldest := Mux((cs.fpWen || cs.rfWen) && !(isMove && ctrl_flow.instr(RS1_MSB,RS1_LSB) === ctrl_flow.instr(RD_MSB,RD_LSB)), ctrl_flow.instr(RD_MSB,RD_LSB), 0.U) 550 551 // fill in exception vector 552 cf_ctrl.cf.exceptionVec := io.enq.ctrl_flow.exceptionVec 553 cf_ctrl.cf.exceptionVec(illegalInstr) := cs.selImm === SelImm.INVALID_INSTR 554 555 // fix frflags 556 // fflags zero csrrs rd csr 557 val isFrflags = BitPat("b000000000001_00000_010_?????_1110011") === ctrl_flow.instr 558 when (cs.fuType === FuType.csr && isFrflags) { 559 cs.blockBackward := false.B 560 } 561 562 // fix isXSTrap 563 when (cs.isXSTrap) { 564 cs.lsrc(0) := XSTrapDecode.lsrc1 565 } 566 567 //to selectout prefetch.r/prefetch.w 568 val isORI = BitPat("b?????????????????110?????0010011") === ctrl_flow.instr 569 cs.isORI := isORI 570 when(cs.isORI) { 571 when(cs.ldest === 0.U) { 572 when(cs.lsrc(1) === "b00001".U) { 573 cs.isSoftPrefetchRead := true.B 574 cs.isSoftPrefetchWrite := false.B 575 }.otherwise { 576 cs.isSoftPrefetchRead := false.B 577 cs.isSoftPrefetchWrite := true.B 578 } 579 cs.selImm := SelImm.IMM_S 580 cs.fuType := FuType.ldu 581 cs.fuOpType := LSUOpType.lb 582 } 583 } 584 585 cs.imm := LookupTree(cs.selImm, ImmUnion.immSelMap.map( 586 x => { 587 val minBits = x._2.minBitsFromInstr(ctrl_flow.instr) 588 require(minBits.getWidth == x._2.len) 589 x._1 -> minBits 590 } 591 )) 592 593 cf_ctrl.ctrl := cs 594 595 // TODO: do we still need this? 596 // fix ret and call 597// when (cs.fuType === FuType.jmp) { 598// def isLink(reg: UInt) = (reg === 1.U || reg === 5.U) 599// when (isLink(cs.ldest) && cs.fuOpType === JumpOpType.jal) { cf_ctrl.ctrl.fuOpType := JumpOpType.call } 600// when (cs.fuOpType === JumpOpType.jalr) { 601// when (isLink(cs.lsrc(0))) { cf_ctrl.ctrl.fuOpType := JumpOpType.ret } 602// when (isLink(cs.ldest)) { cf_ctrl.ctrl.fuOpType := JumpOpType.call } 603// } 604// } 605 606 io.deq.cf_ctrl := cf_ctrl 607 608 //------------------------------------------------------------- 609 // Debug Info 610 XSDebug("in: instr=%x pc=%x excepVec=%b intrVec=%b crossPageIPFFix=%d\n", 611 io.enq.ctrl_flow.instr, io.enq.ctrl_flow.pc, io.enq.ctrl_flow.exceptionVec.asUInt, 612 io.enq.ctrl_flow.intrVec.asUInt, io.enq.ctrl_flow.crossPageIPFFix) 613 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", 614 io.deq.cf_ctrl.ctrl.srcType(0), io.deq.cf_ctrl.ctrl.srcType(1), io.deq.cf_ctrl.ctrl.srcType(2), 615 io.deq.cf_ctrl.ctrl.lsrc(0), io.deq.cf_ctrl.ctrl.lsrc(1), io.deq.cf_ctrl.ctrl.lsrc(2), 616 io.deq.cf_ctrl.ctrl.ldest, io.deq.cf_ctrl.ctrl.fuType, io.deq.cf_ctrl.ctrl.fuOpType) 617 XSDebug("out: rfWen=%d fpWen=%d isXSTrap=%d noSpecExec=%d isBlocked=%d flushPipe=%d isRVF=%d isORI=%x imm=%x\n", 618 io.deq.cf_ctrl.ctrl.rfWen, io.deq.cf_ctrl.ctrl.fpWen, io.deq.cf_ctrl.ctrl.isXSTrap, 619 io.deq.cf_ctrl.ctrl.noSpecExec, io.deq.cf_ctrl.ctrl.blockBackward, io.deq.cf_ctrl.ctrl.flushPipe, 620 io.deq.cf_ctrl.ctrl.isRVF, io.deq.cf_ctrl.ctrl.isORI, io.deq.cf_ctrl.ctrl.imm) 621 XSDebug("out: excepVec=%b intrVec=%b\n", 622 io.deq.cf_ctrl.cf.exceptionVec.asUInt, io.deq.cf_ctrl.cf.intrVec.asUInt) 623} 624