spike_main/disasm.cc

   1 // See LICENSE for license details.
   2
   3 #include "disasm.h"
   4 #include <string>
   5 #include <vector>
   6 #include <cstdarg>
   7 #include <sstream>
   8 #include <stdlib.h>
   9
  10
  11 struct : public arg_t {
  12   std::string to_string(insn_t insn) const {
  13     return std::to_string((int)insn.i_imm()) + '(' + xpr_name[insn.rs1()] + ')';
  14   }
  15 } load_address;
  16
  17 struct : public arg_t {
  18   std::string to_string(insn_t insn) const {
  19     return std::to_string((int)insn.s_imm()) + '(' + xpr_name[insn.rs1()] + ')';
  20   }
  21 } store_address;
  22
  23 struct : public arg_t {
  24   std::string to_string(insn_t insn) const {
  25     return std::string("(") + xpr_name[insn.rs1()] + ')';
  26   }
  27 } amo_address;
  28
  29 struct : public arg_t {
  30   std::string to_string(insn_t insn) const {
  31     return xpr_name[insn.rd()];
  32   }
  33 } xrd;
  34
  35 struct : public arg_t {
  36   std::string to_string(insn_t insn) const {
  37     return xpr_name[insn.rs1()];
  38   }
  39 } xrs1;
  40
  41 struct : public arg_t {
  42   std::string to_string(insn_t insn) const {
  43     return xpr_name[insn.rs2()];
  44   }
  45 } xrs2;
  46
  47 struct : public arg_t {
  48   std::string to_string(insn_t insn) const {
  49     return fpr_name[insn.rd()];
  50   }
  51 } frd;
  52
  53 struct : public arg_t {
  54   std::string to_string(insn_t insn) const {
  55     return fpr_name[insn.rs1()];
  56   }
  57 } frs1;
  58
  59 struct : public arg_t {
  60   std::string to_string(insn_t insn) const {
  61     return fpr_name[insn.rs2()];
  62   }
  63 } frs2;
  64
  65 struct : public arg_t {
  66   std::string to_string(insn_t insn) const {
  67     return fpr_name[insn.rs3()];
  68   }
  69 } frs3;
  70
  71 struct : public arg_t {
  72   std::string to_string(insn_t insn) const {
  73     switch (insn.csr())
  74     {
  75       #define DECLARE_CSR(name, num) case num: return #name;
  76       #include "encoding.h"
  77       #undef DECLARE_CSR
  78       default: return "unknown";
  79     }
  80   }
  81 } csr;
  82
  83 struct : public arg_t {
  84   std::string to_string(insn_t insn) const {
  85     return std::to_string((int)insn.i_imm());
  86   }
  87 } imm;
  88
  89 struct : public arg_t {
  90   std::string to_string(insn_t insn) const {
  91     std::stringstream s;
  92     s << std::hex << "0x" << ((uint32_t)insn.u_imm() >> 12);
  93     return s.str();
  94   }
  95 } bigimm;
  96
  97 struct : public arg_t {
  98   std::string to_string(insn_t insn) const {
  99     return std::to_string(insn.rs1());
 100   }
 101 } zimm5;
 102
 103 struct : public arg_t {
 104   std::string to_string(insn_t insn) const {
 105     std::stringstream s;
 106     int32_t target = insn.sb_imm();
 107     char sign = target >= 0 ? '+' : '-';
 108     s << "pc " << sign << ' ' << abs(target);
 109     return s.str();
 110   }
 111 } branch_target;
 112
 113 struct : public arg_t {
 114   std::string to_string(insn_t insn) const {
 115     std::stringstream s;
 116     int32_t target = insn.uj_imm();
 117     char sign = target >= 0 ? '+' : '-';
 118     s << "pc " << sign << std::hex << " 0x" << abs(target);
 119     return s.str();
 120   }
 121 } jump_target;
 122
 123 struct : public arg_t {
 124   std::string to_string(insn_t insn) const {
 125     return xpr_name[insn.rvc_rs1()];
 126   }
 127 } rvc_rs1;
 128
 129 struct : public arg_t {
 130   std::string to_string(insn_t insn) const {
 131     return xpr_name[insn.rvc_rs2()];
 132   }
 133 } rvc_rs2;
 134
 135 struct : public arg_t {
 136   std::string to_string(insn_t insn) const {
 137     return xpr_name[insn.rvc_rs1s()];
 138   }
 139 } rvc_rs1s;
 140
 141 struct : public arg_t {
 142   std::string to_string(insn_t insn) const {
 143     return xpr_name[insn.rvc_rs2s()];
 144   }
 145 } rvc_rs2s;
 146
 147 struct : public arg_t {
 148   std::string to_string(insn_t insn) const {
 149     return xpr_name[X_SP];
 150   }
 151 } rvc_sp;
 152
 153 struct : public arg_t {
 154   std::string to_string(insn_t insn) const {
 155     return std::to_string((int)insn.rvc_imm());
 156   }
 157 } rvc_imm;
 158
 159 struct : public arg_t {
 160   std::string to_string(insn_t insn) const {
 161     return std::to_string((int)insn.rvc_addi4spn_imm());
 162   }
 163 } rvc_addi4spn_imm;
 164
 165 struct : public arg_t {
 166   std::string to_string(insn_t insn) const {
 167     return std::to_string((int)insn.rvc_addi16sp_imm());
 168   }
 169 } rvc_addi16sp_imm;
 170
 171 struct : public arg_t {
 172   std::string to_string(insn_t insn) const {
 173     return std::to_string((int)insn.rvc_lwsp_imm());
 174   }
 175 } rvc_lwsp_imm;
 176
 177 struct : public arg_t {
 178   std::string to_string(insn_t insn) const {
 179     return std::to_string((int)(insn.rvc_imm() & 0x3f));
 180   }
 181 } rvc_shamt;
 182
 183 struct : public arg_t {
 184   std::string to_string(insn_t insn) const {
 185     std::stringstream s;
 186     s << std::hex << "0x" << (uint32_t)insn.rvc_imm();
 187     return s.str();
 188   }
 189 } rvc_uimm;
 190
 191 struct : public arg_t {
 192   std::string to_string(insn_t insn) const {
 193     return std::to_string((int)insn.rvc_lwsp_imm()) + '(' + xpr_name[X_SP] + ')';
 194   }
 195 } rvc_lwsp_address;
 196
 197 struct : public arg_t {
 198   std::string to_string(insn_t insn) const {
 199     return std::to_string((int)insn.rvc_ldsp_imm()) + '(' + xpr_name[X_SP] + ')';
 200   }
 201 } rvc_ldsp_address;
 202
 203 struct : public arg_t {
 204   std::string to_string(insn_t insn) const {
 205     return std::to_string((int)insn.rvc_swsp_imm()) + '(' + xpr_name[X_SP] + ')';
 206   }
 207 } rvc_swsp_address;
 208
 209 struct : public arg_t {
 210   std::string to_string(insn_t insn) const {
 211     return std::to_string((int)insn.rvc_sdsp_imm()) + '(' + xpr_name[X_SP] + ')';
 212   }
 213 } rvc_sdsp_address;
 214
 215 struct : public arg_t {
 216   std::string to_string(insn_t insn) const {
 217     return std::to_string((int)insn.rvc_lw_imm()) + '(' + xpr_name[insn.rvc_rs1s()] + ')';
 218   }
 219 } rvc_lw_address;
 220
 221 struct : public arg_t {
 222   std::string to_string(insn_t insn) const {
 223     return std::to_string((int)insn.rvc_ld_imm()) + '(' + xpr_name[insn.rvc_rs1s()] + ')';
 224   }
 225 } rvc_ld_address;
 226
 227 struct : public arg_t {
 228   std::string to_string(insn_t insn) const {
 229     std::stringstream s;
 230     int32_t target = insn.rvc_b_imm();
 231     char sign = target >= 0 ? '+' : '-';
 232     s << "pc " << sign << ' ' << abs(target);
 233     return s.str();
 234   }
 235 } rvc_branch_target;
 236
 237 struct : public arg_t {
 238   std::string to_string(insn_t insn) const {
 239     std::stringstream s;
 240     int32_t target = insn.rvc_j_imm();
 241     char sign = target >= 0 ? '+' : '-';
 242     s << "pc " << sign << ' ' << abs(target);
 243     return s.str();
 244   }
 245 } rvc_jump_target;
 246
 247 std::string disassembler_t::disassemble(insn_t insn)
 248 {
 249   const disasm_insn_t* disasm_insn = lookup(insn);
 250   return disasm_insn ? disasm_insn->to_string(insn) : "unknown";
 251 }
 252
 253 disassembler_t::disassembler_t()
 254 {
 255   const uint32_t mask_rd = 0x1fUL << 7;
 256   const uint32_t match_rd_ra = 1UL << 7;
 257   const uint32_t mask_rs1 = 0x1fUL << 15;
 258   const uint32_t match_rs1_ra = 1UL << 15;
 259   const uint32_t mask_rs2 = 0x1fUL << 20;
 260   const uint32_t mask_imm = 0xfffUL << 20;
 261   const uint32_t match_imm_1 = 1UL << 20;
 262   const uint32_t mask_rvc_rs2 = 0x1fUL << 2;
 263   const uint32_t mask_rvc_imm = mask_rvc_rs2 | 0x1000UL;
 264
 265   #define DECLARE_INSN(code, match, mask) \
 266    const uint32_t match_##code = match; \
 267    const uint32_t mask_##code = mask;
 268   #include "encoding.h"
 269   #undef DECLARE_INSN
 270
 271   // explicit per-instruction disassembly
 272   #define DISASM_INSN(name, code, extra, ...) \
 273     add_insn(new disasm_insn_t(name, match_##code, mask_##code | (extra), __VA_ARGS__));
 274   #define DEFINE_NOARG(code) \
 275     add_insn(new disasm_insn_t(#code, match_##code, mask_##code, {}));
 276   #define DEFINE_RTYPE(code) DISASM_INSN(#code, code, 0, {&xrd, &xrs1, &xrs2})
 277   #define DEFINE_ITYPE(code) DISASM_INSN(#code, code, 0, {&xrd, &xrs1, &imm})
 278   #define DEFINE_I0TYPE(name, code) DISASM_INSN(name, code, mask_rs1, {&xrd, &imm})
 279   #define DEFINE_I1TYPE(name, code) DISASM_INSN(name, code, mask_imm, {&xrd, &xrs1})
 280   #define DEFINE_I2TYPE(name, code) DISASM_INSN(name, code, mask_rd | mask_imm, {&xrs1})
 281   #define DEFINE_LTYPE(code) DISASM_INSN(#code, code, 0, {&xrd, &bigimm})
 282   #define DEFINE_BTYPE(code) DISASM_INSN(#code, code, 0, {&xrs1, &xrs2, &branch_target})
 283   #define DEFINE_B0TYPE(name, code) DISASM_INSN(name, code, mask_rs1 | mask_rs2, {&branch_target})
 284   #define DEFINE_B1TYPE(name, code) DISASM_INSN(name, code, mask_rs2, {&xrs1, &branch_target})
 285   #define DEFINE_XLOAD(code) DISASM_INSN(#code, code, 0, {&xrd, &load_address})
 286   #define DEFINE_XSTORE(code) DISASM_INSN(#code, code, 0, {&xrs2, &store_address})
 287   #define DEFINE_XAMO(code) DISASM_INSN(#code, code, 0, {&xrd, &xrs2, &amo_address})
 288   #define DEFINE_FLOAD(code) DISASM_INSN(#code, code, 0, {&frd, &load_address})
 289   #define DEFINE_FSTORE(code) DISASM_INSN(#code, code, 0, {&frs2, &store_address})
 290   #define DEFINE_FRTYPE(code) DISASM_INSN(#code, code, 0, {&frd, &frs1, &frs2})
 291   #define DEFINE_FR1TYPE(code) DISASM_INSN(#code, code, 0, {&frd, &frs1})
 292   #define DEFINE_FR3TYPE(code) DISASM_INSN(#code, code, 0, {&frd, &frs1, &frs2, &frs3})
 293   #define DEFINE_FXTYPE(code) DISASM_INSN(#code, code, 0, {&xrd, &frs1})
 294   #define DEFINE_XFTYPE(code) DISASM_INSN(#code, code, 0, {&frd, &xrs1})
 295
 296   DEFINE_XLOAD(lb)
 297   DEFINE_XLOAD(lbu)
 298   DEFINE_XLOAD(lh)
 299   DEFINE_XLOAD(lhu)
 300   DEFINE_XLOAD(lw)
 301   DEFINE_XLOAD(lwu)
 302   DEFINE_XLOAD(ld)
 303
 304   DEFINE_XSTORE(sb)
 305   DEFINE_XSTORE(sh)
 306   DEFINE_XSTORE(sw)
 307   DEFINE_XSTORE(sd)
 308
 309   DEFINE_XAMO(amoadd_w)
 310   DEFINE_XAMO(amoswap_w)
 311   DEFINE_XAMO(amoand_w)
 312   DEFINE_XAMO(amoor_w)
 313   DEFINE_XAMO(amoxor_w)
 314   DEFINE_XAMO(amomin_w)
 315   DEFINE_XAMO(amomax_w)
 316   DEFINE_XAMO(amominu_w)
 317   DEFINE_XAMO(amomaxu_w)
 318   DEFINE_XAMO(amoadd_d)
 319   DEFINE_XAMO(amoswap_d)
 320   DEFINE_XAMO(amoand_d)
 321   DEFINE_XAMO(amoor_d)
 322   DEFINE_XAMO(amoxor_d)
 323   DEFINE_XAMO(amomin_d)
 324   DEFINE_XAMO(amomax_d)
 325   DEFINE_XAMO(amominu_d)
 326   DEFINE_XAMO(amomaxu_d)
 327
 328   DEFINE_XAMO(lr_w)
 329   DEFINE_XAMO(sc_w)
 330   DEFINE_XAMO(lr_d)
 331   DEFINE_XAMO(sc_d)
 332
 333   DEFINE_FLOAD(flw)
 334   DEFINE_FLOAD(fld)
 335
 336   DEFINE_FSTORE(fsw)
 337   DEFINE_FSTORE(fsd)
 338
 339   add_insn(new disasm_insn_t("j", match_jal, mask_jal | mask_rd, {&jump_target}));
 340   add_insn(new disasm_insn_t("jal", match_jal | match_rd_ra, mask_jal | mask_rd, {&jump_target}));
 341   add_insn(new disasm_insn_t("jal", match_jal, mask_jal, {&xrd, &jump_target}));
 342
 343   DEFINE_B1TYPE("beqz", beq);
 344   DEFINE_B1TYPE("bnez", bne);
 345   DEFINE_B1TYPE("bltz", blt);
 346   DEFINE_B1TYPE("bgez", bge);
 347   DEFINE_BTYPE(beq)
 348   DEFINE_BTYPE(bne)
 349   DEFINE_BTYPE(blt)
 350   DEFINE_BTYPE(bge)
 351   DEFINE_BTYPE(bltu)
 352   DEFINE_BTYPE(bgeu)
 353
 354   DEFINE_LTYPE(lui);
 355   DEFINE_LTYPE(auipc);
 356
 357   add_insn(new disasm_insn_t("ret", match_jalr | match_rs1_ra, mask_jalr | mask_rd | mask_rs1 | mask_imm, {}));
 358   DEFINE_I2TYPE("jr", jalr);
 359   add_insn(new disasm_insn_t("jalr", match_jalr | match_rd_ra, mask_jalr | mask_rd | mask_imm, {&xrs1}));
 360   DEFINE_ITYPE(jalr);
 361
 362   add_insn(new disasm_insn_t("nop", match_addi, mask_addi | mask_rd | mask_rs1 | mask_imm, {}));
 363   add_insn(new disasm_insn_t(" - ", match_xor, mask_xor | mask_rd | mask_rs1 | mask_rs2, {})); // for machine-generated bubbles
 364   DEFINE_I0TYPE("li", addi);
 365   DEFINE_I1TYPE("mv", addi);
 366   DEFINE_ITYPE(addi);
 367   DEFINE_ITYPE(slli);
 368   DEFINE_ITYPE(slti);
 369   add_insn(new disasm_insn_t("seqz", match_sltiu | match_imm_1, mask_sltiu | mask_imm, {&xrd, &xrs1}));
 370   DEFINE_ITYPE(sltiu);
 371   add_insn(new disasm_insn_t("not", match_xori | mask_imm, mask_xori | mask_imm, {&xrd, &xrs1}));
 372   DEFINE_ITYPE(xori);
 373   DEFINE_ITYPE(srli);
 374   DEFINE_ITYPE(srai);
 375   DEFINE_ITYPE(ori);
 376   DEFINE_ITYPE(andi);
 377   DEFINE_I1TYPE("sext.w", addiw);
 378   DEFINE_ITYPE(addiw);
 379   DEFINE_ITYPE(slliw);
 380   DEFINE_ITYPE(srliw);
 381   DEFINE_ITYPE(sraiw);
 382
 383   DEFINE_RTYPE(add);
 384   DEFINE_RTYPE(sub);
 385   DEFINE_RTYPE(sll);
 386   DEFINE_RTYPE(slt);
 387   add_insn(new disasm_insn_t("snez", match_sltu, mask_sltu | mask_rs1, {&xrd, &xrs2}));
 388   DEFINE_RTYPE(sltu);
 389   DEFINE_RTYPE(xor);
 390   DEFINE_RTYPE(srl);
 391   DEFINE_RTYPE(sra);
 392   DEFINE_RTYPE(or);
 393   DEFINE_RTYPE(and);
 394   DEFINE_RTYPE(mul);
 395   DEFINE_RTYPE(mulh);
 396   DEFINE_RTYPE(mulhu);
 397   DEFINE_RTYPE(mulhsu);
 398   DEFINE_RTYPE(div);
 399   DEFINE_RTYPE(divu);
 400   DEFINE_RTYPE(rem);
 401   DEFINE_RTYPE(remu);
 402   DEFINE_RTYPE(addw);
 403   DEFINE_RTYPE(subw);
 404   DEFINE_RTYPE(sllw);
 405   DEFINE_RTYPE(srlw);
 406   DEFINE_RTYPE(sraw);
 407   DEFINE_RTYPE(mulw);
 408   DEFINE_RTYPE(divw);
 409   DEFINE_RTYPE(divuw);
 410   DEFINE_RTYPE(remw);
 411   DEFINE_RTYPE(remuw);
 412
 413   DEFINE_NOARG(scall);
 414   DEFINE_NOARG(sbreak);
 415   DEFINE_NOARG(fence);
 416   DEFINE_NOARG(fence_i);
 417
 418   add_insn(new disasm_insn_t("csrr", match_csrrs, mask_csrrs | mask_rs1, {&xrd, &csr}));
 419   add_insn(new disasm_insn_t("csrw", match_csrrw, mask_csrrw | mask_rd, {&csr, &xrs1}));
 420   add_insn(new disasm_insn_t("csrs", match_csrrs, mask_csrrs | mask_rd, {&csr, &xrs1}));
 421   add_insn(new disasm_insn_t("csrc", match_csrrc, mask_csrrc | mask_rd, {&csr, &xrs1}));
 422   add_insn(new disasm_insn_t("csrwi", match_csrrwi, mask_csrrwi | mask_rd, {&csr, &zimm5}));
 423   add_insn(new disasm_insn_t("csrsi", match_csrrsi, mask_csrrsi | mask_rd, {&csr, &zimm5}));
 424   add_insn(new disasm_insn_t("csrci", match_csrrci, mask_csrrci | mask_rd, {&csr, &zimm5}));
 425   add_insn(new disasm_insn_t("csrrw", match_csrrw, mask_csrrw, {&xrd, &csr, &xrs1}));
 426   add_insn(new disasm_insn_t("csrrs", match_csrrs, mask_csrrs, {&xrd, &csr, &xrs1}));
 427   add_insn(new disasm_insn_t("csrrc", match_csrrc, mask_csrrc, {&xrd, &csr, &xrs1}));
 428   add_insn(new disasm_insn_t("csrrwi", match_csrrwi, mask_csrrwi, {&xrd, &csr, &zimm5}));
 429   add_insn(new disasm_insn_t("csrrsi", match_csrrsi, mask_csrrsi, {&xrd, &csr, &zimm5}));
 430   add_insn(new disasm_insn_t("csrrci", match_csrrci, mask_csrrci, {&xrd, &csr, &zimm5}));
 431   DEFINE_NOARG(sret)
 432
 433   DEFINE_FRTYPE(fadd_s);
 434   DEFINE_FRTYPE(fsub_s);
 435   DEFINE_FRTYPE(fmul_s);
 436   DEFINE_FRTYPE(fdiv_s);
 437   DEFINE_FR1TYPE(fsqrt_s);
 438   DEFINE_FRTYPE(fmin_s);
 439   DEFINE_FRTYPE(fmax_s);
 440   DEFINE_FR3TYPE(fmadd_s);
 441   DEFINE_FR3TYPE(fmsub_s);
 442   DEFINE_FR3TYPE(fnmadd_s);
 443   DEFINE_FR3TYPE(fnmsub_s);
 444   DEFINE_FRTYPE(fsgnj_s);
 445   DEFINE_FRTYPE(fsgnjn_s);
 446   DEFINE_FRTYPE(fsgnjx_s);
 447   DEFINE_FR1TYPE(fcvt_s_d);
 448   DEFINE_XFTYPE(fcvt_s_l);
 449   DEFINE_XFTYPE(fcvt_s_lu);
 450   DEFINE_XFTYPE(fcvt_s_w);
 451   DEFINE_XFTYPE(fcvt_s_wu);
 452   DEFINE_XFTYPE(fcvt_s_wu);
 453   DEFINE_XFTYPE(fmv_s_x);
 454   DEFINE_FXTYPE(fcvt_l_s);
 455   DEFINE_FXTYPE(fcvt_lu_s);
 456   DEFINE_FXTYPE(fcvt_w_s);
 457   DEFINE_FXTYPE(fcvt_wu_s);
 458   DEFINE_FXTYPE(fclass_s);
 459   DEFINE_FXTYPE(fmv_x_s);
 460   DEFINE_FXTYPE(feq_s);
 461   DEFINE_FXTYPE(flt_s);
 462   DEFINE_FXTYPE(fle_s);
 463
 464   DEFINE_FRTYPE(fadd_d);
 465   DEFINE_FRTYPE(fsub_d);
 466   DEFINE_FRTYPE(fmul_d);
 467   DEFINE_FRTYPE(fdiv_d);
 468   DEFINE_FR1TYPE(fsqrt_d);
 469   DEFINE_FRTYPE(fmin_d);
 470   DEFINE_FRTYPE(fmax_d);
 471   DEFINE_FR3TYPE(fmadd_d);
 472   DEFINE_FR3TYPE(fmsub_d);
 473   DEFINE_FR3TYPE(fnmadd_d);
 474   DEFINE_FR3TYPE(fnmsub_d);
 475   DEFINE_FRTYPE(fsgnj_d);
 476   DEFINE_FRTYPE(fsgnjn_d);
 477   DEFINE_FRTYPE(fsgnjx_d);
 478   DEFINE_FR1TYPE(fcvt_d_s);
 479   DEFINE_XFTYPE(fcvt_d_l);
 480   DEFINE_XFTYPE(fcvt_d_lu);
 481   DEFINE_XFTYPE(fcvt_d_w);
 482   DEFINE_XFTYPE(fcvt_d_wu);
 483   DEFINE_XFTYPE(fcvt_d_wu);
 484   DEFINE_XFTYPE(fmv_d_x);
 485   DEFINE_FXTYPE(fcvt_l_d);
 486   DEFINE_FXTYPE(fcvt_lu_d);
 487   DEFINE_FXTYPE(fcvt_w_d);
 488   DEFINE_FXTYPE(fcvt_wu_d);
 489   DEFINE_FXTYPE(fclass_d);
 490   DEFINE_FXTYPE(fmv_x_d);
 491   DEFINE_FXTYPE(feq_d);
 492   DEFINE_FXTYPE(flt_d);
 493   DEFINE_FXTYPE(fle_d);
 494
 495   DISASM_INSN("ebreak", c_add, mask_rd | mask_rvc_rs2, {});
 496   add_insn(new disasm_insn_t("ret", match_c_li | match_rd_ra, mask_c_li | mask_rd | mask_rvc_imm, {}));
 497   DISASM_INSN("jr", c_li, mask_rvc_imm, {&rvc_rs1});
 498   DISASM_INSN("jalr", c_lui, mask_rvc_imm, {&rvc_rs1});
 499   DISASM_INSN("nop", c_addi, mask_rd | mask_rvc_imm, {});
 500   DISASM_INSN("addi", c_addi16sp, mask_rd, {&rvc_sp, &rvc_sp, &rvc_addi16sp_imm});
 501   DISASM_INSN("addi", c_addi4spn, 0, {&rvc_rs1s, &rvc_sp, &rvc_addi4spn_imm});
 502   DISASM_INSN("li", c_li, 0, {&xrd, &rvc_imm});
 503   DISASM_INSN("lui", c_lui, 0, {&xrd, &rvc_uimm});
 504   DISASM_INSN("addi", c_addi, 0, {&xrd, &xrd, &rvc_imm});
 505   DISASM_INSN("addiw", c_addiw, 0, {&xrd, &xrd, &rvc_imm});
 506   DISASM_INSN("slli", c_slli, 0, {&xrd, &rvc_shamt});
 507   DISASM_INSN("mv", c_mv, 0, {&xrd, &rvc_rs2});
 508   DISASM_INSN("add", c_add, 0, {&xrd, &xrd, &rvc_rs2});
 509   DISASM_INSN("addw", c_addw, 0, {&rvc_rs1s, &rvc_rs1s, &rvc_rs2s});
 510   DISASM_INSN("sub", c_sub, 0, {&rvc_rs1s, &rvc_rs1s, &rvc_rs2s});
 511   DISASM_INSN("subw", c_subw, 0, {&rvc_rs1s, &rvc_rs1s, &rvc_rs2s});
 512   DISASM_INSN("and", c_and, 0, {&rvc_rs1s, &rvc_rs1s, &rvc_rs2s});
 513   DISASM_INSN("or", c_or, 0, {&rvc_rs1s, &rvc_rs1s, &rvc_rs2s});
 514   DISASM_INSN("xor", c_xor, 0, {&rvc_rs1s, &rvc_rs1s, &rvc_rs2s});
 515   DISASM_INSN("lw", c_lwsp, 0, {&xrd, &rvc_lwsp_address});
 516   DISASM_INSN("flw", c_flwsp, 0, {&xrd, &rvc_lwsp_address});
 517   DISASM_INSN("sw", c_swsp, 0, {&rvc_rs2, &rvc_swsp_address});
 518   DISASM_INSN("fsw", c_fswsp, 0, {&rvc_rs2, &rvc_swsp_address});
 519   DISASM_INSN("lw", c_lw, 0, {&rvc_rs2s, &rvc_lw_address});
 520   DISASM_INSN("flw", c_flw, 0, {&rvc_rs2s, &rvc_lw_address});
 521   DISASM_INSN("sw", c_sw, 0, {&rvc_rs2s, &rvc_lw_address});
 522   DISASM_INSN("fsw", c_fsw, 0, {&rvc_rs2s, &rvc_lw_address});
 523   DISASM_INSN("beqz", c_beqz, 0, {&rvc_rs1s, &rvc_branch_target});
 524   DISASM_INSN("bnez", c_bnez, 0, {&rvc_rs1s, &rvc_branch_target});
 525   DISASM_INSN("j", c_j, 0, {&rvc_jump_target});
 526
 527   // provide a default disassembly for all instructions as a fallback
 528   #define DECLARE_INSN(code, match, mask) \
 529    add_insn(new disasm_insn_t(#code " (args unknown)", match, mask, {}));
 530   #include "encoding.h"
 531   #undef DECLARE_INSN
 532 }
 533
 534 const disasm_insn_t* disassembler_t::lookup(insn_t insn)
 535 {
 536   size_t idx = insn.bits() % HASH_SIZE;
 537   for (size_t j = 0; j < chain[idx].size(); j++)
 538     if(*chain[idx][j] == insn)
 539       return chain[idx][j];
 540
 541   idx = HASH_SIZE;
 542   for (size_t j = 0; j < chain[idx].size(); j++)
 543     if(*chain[idx][j] == insn)
 544       return chain[idx][j];
 545
 546   return NULL;
 547 }
 548
 549 void disassembler_t::add_insn(disasm_insn_t* insn)
 550 {
 551   size_t idx = HASH_SIZE;
 552   if (insn->get_mask() % HASH_SIZE == HASH_SIZE - 1)
 553     idx = insn->get_match() % HASH_SIZE;
 554   chain[idx].push_back(insn);
 555 }
 556
 557 disassembler_t::~disassembler_t()
 558 {
 559   for (size_t i = 0; i < HASH_SIZE+1; i++)
 560     for (size_t j = 0; j < chain[i].size(); j++)
 561       delete chain[i][j];
 562 }