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 ECALL -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 170 SRET -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 171 MRET -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.csr, CSROpType.jmp, Y, N, N, Y, Y, N, N, SelImm.IMM_I), 172 173 WFI -> List(SrcType.pc, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.sll, Y, N, N, N, N, N, N, SelImm.IMM_X), 174 175 FENCE_I -> List(SrcType.pc, SrcType.imm, SrcType.DC, FuType.fence, FenceOpType.fencei, N, N, N, Y, Y, Y, N, SelImm.IMM_X), 176 FENCE -> List(SrcType.pc, SrcType.imm, SrcType.DC, FuType.fence, FenceOpType.fence, N, N, N, Y, Y, Y, N, SelImm.IMM_X), 177 178 // A-type 179 AMOADD_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoadd_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 180 AMOXOR_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoxor_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 181 AMOSWAP_W->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoswap_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 182 AMOAND_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoand_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 183 AMOOR_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoor_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 184 AMOMIN_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomin_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 185 AMOMINU_W->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amominu_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 186 AMOMAX_W-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomax_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 187 AMOMAXU_W->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomaxu_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 188 189 AMOADD_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoadd_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 190 AMOXOR_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoxor_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 191 AMOSWAP_D->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoswap_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 192 AMOAND_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoand_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 193 AMOOR_D -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amoor_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 194 AMOMIN_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomin_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 195 AMOMINU_D->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amominu_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 196 AMOMAX_D-> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomax_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 197 AMOMAXU_D->List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.amomaxu_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 198 199 LR_W -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.mou, LSUOpType.lr_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 200 LR_D -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.mou, LSUOpType.lr_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 201 SC_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.sc_w, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 202 SC_D -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.mou, LSUOpType.sc_d, Y, N, N, Y, Y, N, N, SelImm.IMM_X), 203 204 ANDN -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.andn, Y, N, N, N, N, N, N, SelImm.IMM_X), 205 ORN -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.orn, Y, N, N, N, N, N, N, SelImm.IMM_X), 206 XNOR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.xnor, Y, N, N, N, N, N, N, SelImm.IMM_X), 207 208 MIN -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.min, Y, N, N, N, N, N, N, SelImm.IMM_X), 209 MINU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.minu, Y, N, N, N, N, N, N, SelImm.IMM_X), 210 MAX -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.max, Y, N, N, N, N, N, N, SelImm.IMM_X), 211 MAXU -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.maxu, Y, N, N, N, N, N, N, SelImm.IMM_X), 212 213 SEXT_B -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.sext_b, Y, N, N, N, N, N, N, SelImm.IMM_X), 214 SEXT_H -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.sext_h, Y, N, N, N, N, N, N, SelImm.IMM_X), 215 ZEXT_H -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.zext_h, Y, N, N, N, N, N, N, SelImm.IMM_X), 216 217 ORC_B -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.orc_b, Y, N, N, N, N, N, N, SelImm.IMM_X), 218 REV8 -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.alu, ALUOpType.rev8, Y, N, N, N, N, N, N, SelImm.IMM_X), 219 220 BSET -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bset, Y, N, N, N, N, N, N, SelImm.IMM_X), 221 BSETI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.bset, Y, N, N, N, N, N, N, SelImm.IMM_I), 222 BCLR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bclr, Y, N, N, N, N, N, N, SelImm.IMM_X), 223 BCLRI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.bclr, Y, N, N, N, N, N, N, SelImm.IMM_I), 224 BINV -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.binv, Y, N, N, N, N, N, N, SelImm.IMM_X), 225 BINVI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.binv, Y, N, N, N, N, N, N, SelImm.IMM_I), 226 BEXT -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.bext, Y, N, N, N, N, N, N, SelImm.IMM_X), 227 BEXTI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.bext, Y, N, N, N, N, N, N, SelImm.IMM_I), 228 229 ROR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.ror, Y, N, N, N, N, N, N, SelImm.IMM_X), 230 RORI -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.ror, Y, N, N, N, N, N, N, SelImm.IMM_I), 231 ROL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.rol, Y, N, N, N, N, N, N, SelImm.IMM_X), 232 233 SH1ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh1add, Y, N, N, N, N, N, N, SelImm.IMM_X), 234 SH2ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh2add, Y, N, N, N, N, N, N, SelImm.IMM_X), 235 SH3ADD -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh3add, Y, N, N, N, N, N, N, SelImm.IMM_X), 236 SH1ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh1add_uw, Y, N, N, N, N, N, N, SelImm.IMM_X), 237 SH2ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh2add_uw, Y, N, N, N, N, N, N, SelImm.IMM_X), 238 SH3ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.sh3add_uw, Y, N, N, N, N, N, N, SelImm.IMM_X), 239 ADDU_W -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.alu, ALUOpType.add_uw, Y, N, N, N, N, N, N, SelImm.IMM_X), 240 SLLIU_W -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.slli_uw, Y, N, N, N, N, N, N, SelImm.IMM_I), 241 ) 242} 243 244/** 245 * FP Decode constants 246 */ 247object FDecode extends DecodeConstants{ 248 val table: Array[(BitPat, List[BitPat])] = Array( 249 250 FLW -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.lw, N, Y, N, N, N, N, Y, SelImm.IMM_I), 251 FLD -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.ldu, LSUOpType.ld, N, Y, N, N, N, N, N, SelImm.IMM_I), 252 FSW -> List(SrcType.reg, SrcType.fp, SrcType.DC, FuType.stu, LSUOpType.sw, N, N, N, N, N, N, Y, SelImm.IMM_S), 253 FSD -> List(SrcType.reg, SrcType.fp, SrcType.DC, FuType.stu, LSUOpType.sd, N, N, N, N, N, N, N, SelImm.IMM_S), 254 255 FCLASS_S-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 256 FCLASS_D-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 257 258 FMV_D_X -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 259 FMV_X_D -> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 260 FMV_X_W -> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 261 FMV_W_X -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 262 263 FSGNJ_S -> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 264 FSGNJ_D -> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 265 FSGNJX_S-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 266 FSGNJX_D-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 267 FSGNJN_S-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 268 FSGNJN_D-> List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 269 270 // FP to FP 271 FCVT_S_D-> List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 272 FCVT_D_S-> List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 273 274 // Int to FP 275 FCVT_S_W-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 276 FCVT_S_WU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 277 FCVT_S_L-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 278 FCVT_S_LU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 279 280 FCVT_D_W-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 281 FCVT_D_WU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 282 FCVT_D_L-> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 283 FCVT_D_LU->List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.i2f, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 284 285 // FP to Int 286 FCVT_W_S-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 287 FCVT_WU_S->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 288 FCVT_L_S-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 289 FCVT_LU_S->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 290 291 FCVT_W_D-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 292 FCVT_WU_D->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 293 FCVT_L_D-> List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 294 FCVT_LU_D->List(SrcType.fp , SrcType.imm, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 295 296 // "fp_single" is used for wb_data formatting (and debugging) 297 FEQ_S ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 298 FLT_S ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 299 FLE_S ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, Y, SelImm.IMM_X), 300 301 FEQ_D ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 302 FLT_D ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 303 FLE_D ->List(SrcType.fp , SrcType.fp, SrcType.DC, FuType.fmisc, X, Y, N, N, N, N, N, N, SelImm.IMM_X), 304 305 FMIN_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 306 FMAX_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 307 FMIN_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 308 FMAX_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 309 310 FADD_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 311 FSUB_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 312 FMUL_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 313 FADD_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 314 FSUB_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 315 FMUL_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 316 317 FMADD_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 318 FMSUB_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 319 FNMADD_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 320 FNMSUB_S ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 321 FMADD_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 322 FMSUB_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 323 FNMADD_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 324 FNMSUB_D ->List(SrcType.fp, SrcType.fp, SrcType.fp, FuType.fmac, X, N, Y, N, N, N, N, N, SelImm.IMM_X) 325 ) 326} 327 328/** 329 * Bit Manipulation Decode 330 */ 331object BDecode extends DecodeConstants{ 332 val table: Array[(BitPat, List[BitPat])] = Array( 333 // Basic bit manipulation 334 CLZ -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bmu, ALUOpType.clz, Y, N, N, N, N, N, N, SelImm.IMM_X), 335 CTZ -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bmu, ALUOpType.ctz, Y, N, N, N, N, N, N, SelImm.IMM_X), 336 CPOP -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bmu, ALUOpType.cpop, Y, N, N, N, N, N, N, SelImm.IMM_X), 337 338 CLZW -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bmu, ALUOpType.clzw, Y, N, N, N, N, N, N, SelImm.IMM_X), 339 CTZW -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bmu, ALUOpType.ctzw, Y, N, N, N, N, N, N, SelImm.IMM_X), 340 CPOPW -> List(SrcType.reg, SrcType.DC, SrcType.DC, FuType.bmu, ALUOpType.cpopw, Y, N, N, N, N, N, N, SelImm.IMM_X), 341 342 CLMUL -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bmu, BMUOpType.clmul, Y, N, N, N, N, N, N, SelImm.IMM_X), 343 CLMULH -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bmu, BMUOpType.clmulh, Y, N, N, N, N, N, N, SelImm.IMM_X), 344 CLMULR -> List(SrcType.reg, SrcType.reg, SrcType.DC, FuType.bmu, BMUOpType.clmulr, Y, N, N, N, N, N, N, SelImm.IMM_X) 345 ) 346} 347 348/** 349 * FP Divide SquareRoot Constants 350 */ 351object FDivSqrtDecode extends DecodeConstants { 352 val table: Array[(BitPat, List[BitPat])] = Array( 353 FDIV_S ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 354 FDIV_D ->List(SrcType.fp, SrcType.fp, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X), 355 FSQRT_S ->List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, Y, SelImm.IMM_X), 356 FSQRT_D ->List(SrcType.fp, SrcType.imm, SrcType.DC, FuType.fmisc, X, N, Y, N, N, N, N, N, SelImm.IMM_X) 357 ) 358} 359 360/** 361 * XiangShan Trap Decode constants 362 */ 363object XSTrapDecode extends DecodeConstants { 364 // calculate as ADDI => addi zero, a0, 0 365 // replace rs '?????' with '01010'(a0) in decode stage 366 def lsrc1 = "b01010".U // $a0 367 val table: Array[(BitPat, List[BitPat])] = Array( 368 TRAP -> List(SrcType.reg, SrcType.imm, SrcType.DC, FuType.alu, ALUOpType.add, Y, N, Y, Y, Y, N, N, SelImm.IMM_I) 369 ) 370} 371 372//object Imm32Gen { 373// def apply(sel: UInt, inst: UInt) = { 374// val sign = Mux(sel === SelImm.IMM_Z, 0.S, inst(31).asSInt) 375// val b30_20 = Mux(sel === SelImm.IMM_U, inst(30,20).asSInt, sign) 376// val b19_12 = Mux(sel =/= SelImm.IMM_U && sel =/= SelImm.IMM_UJ, sign, inst(19,12).asSInt) 377// val b11 = Mux(sel === SelImm.IMM_U || sel === SelImm.IMM_Z, 0.S, 378// Mux(sel === SelImm.IMM_UJ, inst(20).asSInt, 379// Mux(sel === SelImm.IMM_SB, inst(7).asSInt, sign))) 380// val b10_5 = Mux(sel === SelImm.IMM_U || sel === SelImm.IMM_Z, 0.U(1.W), inst(30,25)) 381// val b4_1 = Mux(sel === SelImm.IMM_U, 0.U(1.W), 382// Mux(sel === SelImm.IMM_S || sel === SelImm.IMM_SB, inst(11,8), 383// Mux(sel === SelImm.IMM_Z, inst(19,16), inst(24,21)))) 384// val b0 = Mux(sel === SelImm.IMM_S, inst(7), 385// Mux(sel === SelImm.IMM_I, inst(20), 386// Mux(sel === SelImm.IMM_Z, inst(15), 0.U(1.W)))) 387// 388// Cat(sign, b30_20, b19_12, b11, b10_5, b4_1, b0) 389// } 390//} 391 392abstract class Imm(val len: Int) extends Bundle { 393 def toImm32(minBits: UInt): UInt = do_toImm32(minBits(len - 1, 0)) 394 def do_toImm32(minBits: UInt): UInt 395 def minBitsFromInstr(instr: UInt): UInt 396} 397 398case class Imm_I() extends Imm(12) { 399 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 400 401 override def minBitsFromInstr(instr: UInt): UInt = 402 Cat(instr(31, 20)) 403} 404 405case class Imm_S() extends Imm(12) { 406 override def do_toImm32(minBits: UInt): UInt = SignExt(minBits, 32) 407 408 override def minBitsFromInstr(instr: UInt): UInt = 409 Cat(instr(31, 25), instr(11, 7)) 410} 411 412case class Imm_B() extends Imm(12) { 413 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 414 415 override def minBitsFromInstr(instr: UInt): UInt = 416 Cat(instr(31), instr(7), instr(30, 25), instr(11, 8)) 417} 418 419case class Imm_U() extends Imm(20){ 420 override def do_toImm32(minBits: UInt): UInt = Cat(minBits, 0.U(12.W)) 421 422 override def minBitsFromInstr(instr: UInt): UInt = { 423 instr(31, 12) 424 } 425} 426 427case class Imm_J() extends Imm(20){ 428 override def do_toImm32(minBits: UInt): UInt = SignExt(Cat(minBits, 0.U(1.W)), 32) 429 430 override def minBitsFromInstr(instr: UInt): UInt = { 431 Cat(instr(31), instr(19, 12), instr(20), instr(30, 25), instr(24, 21)) 432 } 433} 434 435case class Imm_Z() extends Imm(12 + 5){ 436 override def do_toImm32(minBits: UInt): UInt = minBits 437 438 override def minBitsFromInstr(instr: UInt): UInt = { 439 Cat(instr(19, 15), instr(31, 20)) 440 } 441} 442 443case class Imm_B6() extends Imm(6){ 444 override def do_toImm32(minBits: UInt): UInt = ZeroExt(minBits, 32) 445 446 override def minBitsFromInstr(instr: UInt): UInt = { 447 instr(25, 20) 448 } 449} 450 451object ImmUnion { 452 val I = Imm_I() 453 val S = Imm_S() 454 val B = Imm_B() 455 val U = Imm_U() 456 val J = Imm_J() 457 val Z = Imm_Z() 458 val B6 = Imm_B6() 459 val imms = Seq(I, S, B, U, J, Z, B6) 460 val maxLen = imms.maxBy(_.len).len 461 val immSelMap = Seq( 462 SelImm.IMM_I, 463 SelImm.IMM_S, 464 SelImm.IMM_SB, 465 SelImm.IMM_U, 466 SelImm.IMM_UJ, 467 SelImm.IMM_Z, 468 SelImm.IMM_B6 469 ).zip(imms) 470 println(s"ImmUnion max len: $maxLen") 471} 472 473 474/** 475 * IO bundle for the Decode unit 476 */ 477class DecodeUnitIO(implicit p: Parameters) extends XSBundle { 478 val enq = new Bundle { val ctrl_flow = Input(new CtrlFlow) } 479 val deq = new Bundle { val cf_ctrl = Output(new CfCtrl) } 480} 481 482/** 483 * Decode unit that takes in a single CtrlFlow and generates a CfCtrl. 484 */ 485class DecodeUnit(implicit p: Parameters) extends XSModule with DecodeUnitConstants { 486 val io = IO(new DecodeUnitIO) 487 488 val ctrl_flow = Wire(new CtrlFlow) // input with RVC Expanded 489 val cf_ctrl = Wire(new CfCtrl) 490 491 ctrl_flow := io.enq.ctrl_flow 492 493 var decode_table = XDecode.table ++ FDecode.table ++ FDivSqrtDecode.table ++ X64Decode.table ++ XSTrapDecode.table ++ BDecode.table 494 495 // output 496 cf_ctrl.cf := ctrl_flow 497 val cs = Wire(new CtrlSignals()).decode(ctrl_flow.instr, decode_table) 498 499 val fpDecoder = Module(new FPDecoder) 500 fpDecoder.io.instr := ctrl_flow.instr 501 cs.fpu := fpDecoder.io.fpCtrl 502 503 // read src1~3 location 504 cs.lsrc(0) := Mux(ctrl_flow.instr === LUI, 0.U,ctrl_flow.instr(RS1_MSB,RS1_LSB)) 505 cs.lsrc(1) := ctrl_flow.instr(RS2_MSB,RS2_LSB) 506 cs.lsrc(2) := ctrl_flow.instr(RS3_MSB,RS3_LSB) 507 // read dest location 508 cs.ldest := Mux(cs.fpWen || cs.rfWen, ctrl_flow.instr(RD_MSB,RD_LSB), 0.U) 509 510 // fill in exception vector 511 cf_ctrl.cf.exceptionVec := io.enq.ctrl_flow.exceptionVec 512 cf_ctrl.cf.exceptionVec(illegalInstr) := cs.selImm === SelImm.INVALID_INSTR 513 514 // fix frflags 515 // fflags zero csrrs rd csr 516 val isFrflags = BitPat("b000000000001_00000_010_?????_1110011") === ctrl_flow.instr 517 when (cs.fuType === FuType.csr && isFrflags) { 518 cs.blockBackward := false.B 519 } 520 521 // fix isXSTrap 522 when (cs.isXSTrap) { 523 cs.lsrc(0) := XSTrapDecode.lsrc1 524 } 525 526 cs.imm := LookupTree(cs.selImm, ImmUnion.immSelMap.map( 527 x => { 528 val minBits = x._2.minBitsFromInstr(ctrl_flow.instr) 529 require(minBits.getWidth == x._2.len) 530 x._1 -> minBits 531 } 532 )) 533 534 cs.isMove := BitPat("b000000000000_?????_000_?????_0010011") === ctrl_flow.instr 535 536 cf_ctrl.ctrl := cs 537 538 // TODO: do we still need this? 539 // fix ret and call 540// when (cs.fuType === FuType.jmp) { 541// def isLink(reg: UInt) = (reg === 1.U || reg === 5.U) 542// when (isLink(cs.ldest) && cs.fuOpType === JumpOpType.jal) { cf_ctrl.ctrl.fuOpType := JumpOpType.call } 543// when (cs.fuOpType === JumpOpType.jalr) { 544// when (isLink(cs.lsrc(0))) { cf_ctrl.ctrl.fuOpType := JumpOpType.ret } 545// when (isLink(cs.ldest)) { cf_ctrl.ctrl.fuOpType := JumpOpType.call } 546// } 547// } 548 549 io.deq.cf_ctrl := cf_ctrl 550 551 //------------------------------------------------------------- 552 // Debug Info 553 XSDebug("in: instr=%x pc=%x excepVec=%b intrVec=%b crossPageIPFFix=%d\n", 554 io.enq.ctrl_flow.instr, io.enq.ctrl_flow.pc, io.enq.ctrl_flow.exceptionVec.asUInt, 555 io.enq.ctrl_flow.intrVec.asUInt, io.enq.ctrl_flow.crossPageIPFFix) 556 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", 557 io.deq.cf_ctrl.ctrl.srcType(0), io.deq.cf_ctrl.ctrl.srcType(1), io.deq.cf_ctrl.ctrl.srcType(2), 558 io.deq.cf_ctrl.ctrl.lsrc(0), io.deq.cf_ctrl.ctrl.lsrc(1), io.deq.cf_ctrl.ctrl.lsrc(2), 559 io.deq.cf_ctrl.ctrl.ldest, io.deq.cf_ctrl.ctrl.fuType, io.deq.cf_ctrl.ctrl.fuOpType) 560 XSDebug("out: rfWen=%d fpWen=%d isXSTrap=%d noSpecExec=%d isBlocked=%d flushPipe=%d isRVF=%d imm=%x\n", 561 io.deq.cf_ctrl.ctrl.rfWen, io.deq.cf_ctrl.ctrl.fpWen, io.deq.cf_ctrl.ctrl.isXSTrap, 562 io.deq.cf_ctrl.ctrl.noSpecExec, io.deq.cf_ctrl.ctrl.blockBackward, io.deq.cf_ctrl.ctrl.flushPipe, 563 io.deq.cf_ctrl.ctrl.isRVF, io.deq.cf_ctrl.ctrl.imm) 564 XSDebug("out: excepVec=%b intrVec=%b\n", 565 io.deq.cf_ctrl.cf.exceptionVec.asUInt, io.deq.cf_ctrl.cf.intrVec.asUInt) 566} 567