target-lm32/translate.c

   1 /*
   2  *  LatticeMico32 main translation routines.
   3  *
   4  *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cpu.h"
  21 #include "disas/disas.h"
  22 #include "exec/helper-proto.h"
  23 #include "tcg-op.h"
  24
  25 #include "exec/cpu_ldst.h"
  26 #include "hw/lm32/lm32_pic.h"
  27
  28 #include "exec/helper-gen.h"
  29
  30 #include "trace-tcg.h"
  31
  32
  33 #define DISAS_LM32 1
  34 #if DISAS_LM32
  35 #  define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
  36 #else
  37 #  define LOG_DIS(...) do { } while (0)
  38 #endif
  39
  40 #define EXTRACT_FIELD(src, start, end) \
  41             (((src) >> start) & ((1 << (end - start + 1)) - 1))
  42
  43 #define MEM_INDEX 0
  44
  45 static TCGv_ptr cpu_env;
  46 static TCGv cpu_R[32];
  47 static TCGv cpu_pc;
  48 static TCGv cpu_ie;
  49 static TCGv cpu_icc;
  50 static TCGv cpu_dcc;
  51 static TCGv cpu_cc;
  52 static TCGv cpu_cfg;
  53 static TCGv cpu_eba;
  54 static TCGv cpu_dc;
  55 static TCGv cpu_deba;
  56 static TCGv cpu_bp[4];
  57 static TCGv cpu_wp[4];
  58
  59 #include "exec/gen-icount.h"
  60
  61 enum {
  62     OP_FMT_RI,
  63     OP_FMT_RR,
  64     OP_FMT_CR,
  65     OP_FMT_I
  66 };
  67
  68 /* This is the state at translation time.  */
  69 typedef struct DisasContext {
  70     target_ulong pc;
  71
  72     /* Decoder.  */
  73     int format;
  74     uint32_t ir;
  75     uint8_t opcode;
  76     uint8_t r0, r1, r2, csr;
  77     uint16_t imm5;
  78     uint16_t imm16;
  79     uint32_t imm26;
  80
  81     unsigned int delayed_branch;
  82     unsigned int tb_flags, synced_flags; /* tb dependent flags.  */
  83     int is_jmp;
  84
  85     struct TranslationBlock *tb;
  86     int singlestep_enabled;
  87
  88     uint32_t features;
  89     uint8_t num_breakpoints;
  90     uint8_t num_watchpoints;
  91 } DisasContext;
  92
  93 static const char *regnames[] = {
  94     "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
  95     "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
  96     "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
  97     "r24", "r25", "r26/gp", "r27/fp", "r28/sp", "r29/ra",
  98     "r30/ea", "r31/ba", "bp0", "bp1", "bp2", "bp3", "wp0",
  99     "wp1", "wp2", "wp3"
 100 };
 101
 102 static inline int zero_extend(unsigned int val, int width)
 103 {
 104     return val & ((1 << width) - 1);
 105 }
 106
 107 static inline int sign_extend(unsigned int val, int width)
 108 {
 109     int sval;
 110
 111     /* LSL.  */
 112     val <<= 32 - width;
 113     sval = val;
 114     /* ASR.  */
 115     sval >>= 32 - width;
 116
 117     return sval;
 118 }
 119
 120 static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
 121 {
 122     TCGv_i32 tmp = tcg_const_i32(index);
 123
 124     gen_helper_raise_exception(cpu_env, tmp);
 125     tcg_temp_free_i32(tmp);
 126 }
 127
 128 static inline void t_gen_illegal_insn(DisasContext *dc)
 129 {
 130     tcg_gen_movi_tl(cpu_pc, dc->pc);
 131     gen_helper_ill(cpu_env);
 132 }
 133
 134 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
 135 {
 136     TranslationBlock *tb;
 137
 138     tb = dc->tb;
 139     if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
 140             likely(!dc->singlestep_enabled)) {
 141         tcg_gen_goto_tb(n);
 142         tcg_gen_movi_tl(cpu_pc, dest);
 143         tcg_gen_exit_tb((uintptr_t)tb + n);
 144     } else {
 145         tcg_gen_movi_tl(cpu_pc, dest);
 146         if (dc->singlestep_enabled) {
 147             t_gen_raise_exception(dc, EXCP_DEBUG);
 148         }
 149         tcg_gen_exit_tb(0);
 150     }
 151 }
 152
 153 static void dec_add(DisasContext *dc)
 154 {
 155     if (dc->format == OP_FMT_RI) {
 156         if (dc->r0 == R_R0) {
 157             if (dc->r1 == R_R0 && dc->imm16 == 0) {
 158                 LOG_DIS("nop\n");
 159             } else {
 160                 LOG_DIS("mvi r%d, %d\n", dc->r1, sign_extend(dc->imm16, 16));
 161             }
 162         } else {
 163             LOG_DIS("addi r%d, r%d, %d\n", dc->r1, dc->r0,
 164                     sign_extend(dc->imm16, 16));
 165         }
 166     } else {
 167         LOG_DIS("add r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 168     }
 169
 170     if (dc->format == OP_FMT_RI) {
 171         tcg_gen_addi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
 172                 sign_extend(dc->imm16, 16));
 173     } else {
 174         tcg_gen_add_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 175     }
 176 }
 177
 178 static void dec_and(DisasContext *dc)
 179 {
 180     if (dc->format == OP_FMT_RI) {
 181         LOG_DIS("andi r%d, r%d, %d\n", dc->r1, dc->r0,
 182                 zero_extend(dc->imm16, 16));
 183     } else {
 184         LOG_DIS("and r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 185     }
 186
 187     if (dc->format == OP_FMT_RI) {
 188         tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
 189                 zero_extend(dc->imm16, 16));
 190     } else  {
 191         if (dc->r0 == 0 && dc->r1 == 0 && dc->r2 == 0) {
 192             tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
 193             gen_helper_hlt(cpu_env);
 194         } else {
 195             tcg_gen_and_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 196         }
 197     }
 198 }
 199
 200 static void dec_andhi(DisasContext *dc)
 201 {
 202     LOG_DIS("andhi r%d, r%d, %d\n", dc->r2, dc->r0, dc->imm16);
 203
 204     tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0], (dc->imm16 << 16));
 205 }
 206
 207 static void dec_b(DisasContext *dc)
 208 {
 209     if (dc->r0 == R_RA) {
 210         LOG_DIS("ret\n");
 211     } else if (dc->r0 == R_EA) {
 212         LOG_DIS("eret\n");
 213     } else if (dc->r0 == R_BA) {
 214         LOG_DIS("bret\n");
 215     } else {
 216         LOG_DIS("b r%d\n", dc->r0);
 217     }
 218
 219     /* restore IE.IE in case of an eret */
 220     if (dc->r0 == R_EA) {
 221         TCGv t0 = tcg_temp_new();
 222         TCGLabel *l1 = gen_new_label();
 223         tcg_gen_andi_tl(t0, cpu_ie, IE_EIE);
 224         tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_IE);
 225         tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_EIE, l1);
 226         tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
 227         gen_set_label(l1);
 228         tcg_temp_free(t0);
 229     } else if (dc->r0 == R_BA) {
 230         TCGv t0 = tcg_temp_new();
 231         TCGLabel *l1 = gen_new_label();
 232         tcg_gen_andi_tl(t0, cpu_ie, IE_BIE);
 233         tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_IE);
 234         tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_BIE, l1);
 235         tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
 236         gen_set_label(l1);
 237         tcg_temp_free(t0);
 238     }
 239     tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
 240
 241     dc->is_jmp = DISAS_JUMP;
 242 }
 243
 244 static void dec_bi(DisasContext *dc)
 245 {
 246     LOG_DIS("bi %d\n", sign_extend(dc->imm26 << 2, 26));
 247
 248     gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
 249
 250     dc->is_jmp = DISAS_TB_JUMP;
 251 }
 252
 253 static inline void gen_cond_branch(DisasContext *dc, int cond)
 254 {
 255     TCGLabel *l1 = gen_new_label();
 256     tcg_gen_brcond_tl(cond, cpu_R[dc->r0], cpu_R[dc->r1], l1);
 257     gen_goto_tb(dc, 0, dc->pc + 4);
 258     gen_set_label(l1);
 259     gen_goto_tb(dc, 1, dc->pc + (sign_extend(dc->imm16 << 2, 16)));
 260     dc->is_jmp = DISAS_TB_JUMP;
 261 }
 262
 263 static void dec_be(DisasContext *dc)
 264 {
 265     LOG_DIS("be r%d, r%d, %d\n", dc->r0, dc->r1,
 266             sign_extend(dc->imm16, 16) * 4);
 267
 268     gen_cond_branch(dc, TCG_COND_EQ);
 269 }
 270
 271 static void dec_bg(DisasContext *dc)
 272 {
 273     LOG_DIS("bg r%d, r%d, %d\n", dc->r0, dc->r1,
 274             sign_extend(dc->imm16, 16 * 4));
 275
 276     gen_cond_branch(dc, TCG_COND_GT);
 277 }
 278
 279 static void dec_bge(DisasContext *dc)
 280 {
 281     LOG_DIS("bge r%d, r%d, %d\n", dc->r0, dc->r1,
 282             sign_extend(dc->imm16, 16) * 4);
 283
 284     gen_cond_branch(dc, TCG_COND_GE);
 285 }
 286
 287 static void dec_bgeu(DisasContext *dc)
 288 {
 289     LOG_DIS("bgeu r%d, r%d, %d\n", dc->r0, dc->r1,
 290             sign_extend(dc->imm16, 16) * 4);
 291
 292     gen_cond_branch(dc, TCG_COND_GEU);
 293 }
 294
 295 static void dec_bgu(DisasContext *dc)
 296 {
 297     LOG_DIS("bgu r%d, r%d, %d\n", dc->r0, dc->r1,
 298             sign_extend(dc->imm16, 16) * 4);
 299
 300     gen_cond_branch(dc, TCG_COND_GTU);
 301 }
 302
 303 static void dec_bne(DisasContext *dc)
 304 {
 305     LOG_DIS("bne r%d, r%d, %d\n", dc->r0, dc->r1,
 306             sign_extend(dc->imm16, 16) * 4);
 307
 308     gen_cond_branch(dc, TCG_COND_NE);
 309 }
 310
 311 static void dec_call(DisasContext *dc)
 312 {
 313     LOG_DIS("call r%d\n", dc->r0);
 314
 315     tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
 316     tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
 317
 318     dc->is_jmp = DISAS_JUMP;
 319 }
 320
 321 static void dec_calli(DisasContext *dc)
 322 {
 323     LOG_DIS("calli %d\n", sign_extend(dc->imm26, 26) * 4);
 324
 325     tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
 326     gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
 327
 328     dc->is_jmp = DISAS_TB_JUMP;
 329 }
 330
 331 static inline void gen_compare(DisasContext *dc, int cond)
 332 {
 333     int rX = (dc->format == OP_FMT_RR) ? dc->r2 : dc->r1;
 334     int rY = (dc->format == OP_FMT_RR) ? dc->r0 : dc->r0;
 335     int rZ = (dc->format == OP_FMT_RR) ? dc->r1 : -1;
 336     int i;
 337
 338     if (dc->format == OP_FMT_RI) {
 339         switch (cond) {
 340         case TCG_COND_GEU:
 341         case TCG_COND_GTU:
 342             i = zero_extend(dc->imm16, 16);
 343             break;
 344         default:
 345             i = sign_extend(dc->imm16, 16);
 346             break;
 347         }
 348
 349         tcg_gen_setcondi_tl(cond, cpu_R[rX], cpu_R[rY], i);
 350     } else {
 351         tcg_gen_setcond_tl(cond, cpu_R[rX], cpu_R[rY], cpu_R[rZ]);
 352     }
 353 }
 354
 355 static void dec_cmpe(DisasContext *dc)
 356 {
 357     if (dc->format == OP_FMT_RI) {
 358         LOG_DIS("cmpei r%d, r%d, %d\n", dc->r0, dc->r1,
 359                 sign_extend(dc->imm16, 16));
 360     } else {
 361         LOG_DIS("cmpe r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 362     }
 363
 364     gen_compare(dc, TCG_COND_EQ);
 365 }
 366
 367 static void dec_cmpg(DisasContext *dc)
 368 {
 369     if (dc->format == OP_FMT_RI) {
 370         LOG_DIS("cmpgi r%d, r%d, %d\n", dc->r0, dc->r1,
 371                 sign_extend(dc->imm16, 16));
 372     } else {
 373         LOG_DIS("cmpg r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 374     }
 375
 376     gen_compare(dc, TCG_COND_GT);
 377 }
 378
 379 static void dec_cmpge(DisasContext *dc)
 380 {
 381     if (dc->format == OP_FMT_RI) {
 382         LOG_DIS("cmpgei r%d, r%d, %d\n", dc->r0, dc->r1,
 383                 sign_extend(dc->imm16, 16));
 384     } else {
 385         LOG_DIS("cmpge r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 386     }
 387
 388     gen_compare(dc, TCG_COND_GE);
 389 }
 390
 391 static void dec_cmpgeu(DisasContext *dc)
 392 {
 393     if (dc->format == OP_FMT_RI) {
 394         LOG_DIS("cmpgeui r%d, r%d, %d\n", dc->r0, dc->r1,
 395                 zero_extend(dc->imm16, 16));
 396     } else {
 397         LOG_DIS("cmpgeu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 398     }
 399
 400     gen_compare(dc, TCG_COND_GEU);
 401 }
 402
 403 static void dec_cmpgu(DisasContext *dc)
 404 {
 405     if (dc->format == OP_FMT_RI) {
 406         LOG_DIS("cmpgui r%d, r%d, %d\n", dc->r0, dc->r1,
 407                 zero_extend(dc->imm16, 16));
 408     } else {
 409         LOG_DIS("cmpgu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 410     }
 411
 412     gen_compare(dc, TCG_COND_GTU);
 413 }
 414
 415 static void dec_cmpne(DisasContext *dc)
 416 {
 417     if (dc->format == OP_FMT_RI) {
 418         LOG_DIS("cmpnei r%d, r%d, %d\n", dc->r0, dc->r1,
 419                 sign_extend(dc->imm16, 16));
 420     } else {
 421         LOG_DIS("cmpne r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 422     }
 423
 424     gen_compare(dc, TCG_COND_NE);
 425 }
 426
 427 static void dec_divu(DisasContext *dc)
 428 {
 429     TCGLabel *l1;
 430
 431     LOG_DIS("divu r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 432
 433     if (!(dc->features & LM32_FEATURE_DIVIDE)) {
 434         qemu_log_mask(LOG_GUEST_ERROR, "hardware divider is not available\n");
 435         t_gen_illegal_insn(dc);
 436         return;
 437     }
 438
 439     l1 = gen_new_label();
 440     tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
 441     tcg_gen_movi_tl(cpu_pc, dc->pc);
 442     t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
 443     gen_set_label(l1);
 444     tcg_gen_divu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 445 }
 446
 447 static void dec_lb(DisasContext *dc)
 448 {
 449     TCGv t0;
 450
 451     LOG_DIS("lb r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
 452
 453     t0 = tcg_temp_new();
 454     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 455     tcg_gen_qemu_ld8s(cpu_R[dc->r1], t0, MEM_INDEX);
 456     tcg_temp_free(t0);
 457 }
 458
 459 static void dec_lbu(DisasContext *dc)
 460 {
 461     TCGv t0;
 462
 463     LOG_DIS("lbu r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
 464
 465     t0 = tcg_temp_new();
 466     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 467     tcg_gen_qemu_ld8u(cpu_R[dc->r1], t0, MEM_INDEX);
 468     tcg_temp_free(t0);
 469 }
 470
 471 static void dec_lh(DisasContext *dc)
 472 {
 473     TCGv t0;
 474
 475     LOG_DIS("lh r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
 476
 477     t0 = tcg_temp_new();
 478     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 479     tcg_gen_qemu_ld16s(cpu_R[dc->r1], t0, MEM_INDEX);
 480     tcg_temp_free(t0);
 481 }
 482
 483 static void dec_lhu(DisasContext *dc)
 484 {
 485     TCGv t0;
 486
 487     LOG_DIS("lhu r%d, (r%d+%d)\n", dc->r1, dc->r0, dc->imm16);
 488
 489     t0 = tcg_temp_new();
 490     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 491     tcg_gen_qemu_ld16u(cpu_R[dc->r1], t0, MEM_INDEX);
 492     tcg_temp_free(t0);
 493 }
 494
 495 static void dec_lw(DisasContext *dc)
 496 {
 497     TCGv t0;
 498
 499     LOG_DIS("lw r%d, (r%d+%d)\n", dc->r1, dc->r0, sign_extend(dc->imm16, 16));
 500
 501     t0 = tcg_temp_new();
 502     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 503     tcg_gen_qemu_ld32s(cpu_R[dc->r1], t0, MEM_INDEX);
 504     tcg_temp_free(t0);
 505 }
 506
 507 static void dec_modu(DisasContext *dc)
 508 {
 509     TCGLabel *l1;
 510
 511     LOG_DIS("modu r%d, r%d, %d\n", dc->r2, dc->r0, dc->r1);
 512
 513     if (!(dc->features & LM32_FEATURE_DIVIDE)) {
 514         qemu_log_mask(LOG_GUEST_ERROR, "hardware divider is not available\n");
 515         t_gen_illegal_insn(dc);
 516         return;
 517     }
 518
 519     l1 = gen_new_label();
 520     tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
 521     tcg_gen_movi_tl(cpu_pc, dc->pc);
 522     t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
 523     gen_set_label(l1);
 524     tcg_gen_remu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 525 }
 526
 527 static void dec_mul(DisasContext *dc)
 528 {
 529     if (dc->format == OP_FMT_RI) {
 530         LOG_DIS("muli r%d, r%d, %d\n", dc->r0, dc->r1,
 531                 sign_extend(dc->imm16, 16));
 532     } else {
 533         LOG_DIS("mul r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 534     }
 535
 536     if (!(dc->features & LM32_FEATURE_MULTIPLY)) {
 537         qemu_log_mask(LOG_GUEST_ERROR,
 538                       "hardware multiplier is not available\n");
 539         t_gen_illegal_insn(dc);
 540         return;
 541     }
 542
 543     if (dc->format == OP_FMT_RI) {
 544         tcg_gen_muli_tl(cpu_R[dc->r1], cpu_R[dc->r0],
 545                 sign_extend(dc->imm16, 16));
 546     } else {
 547         tcg_gen_mul_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 548     }
 549 }
 550
 551 static void dec_nor(DisasContext *dc)
 552 {
 553     if (dc->format == OP_FMT_RI) {
 554         LOG_DIS("nori r%d, r%d, %d\n", dc->r0, dc->r1,
 555                 zero_extend(dc->imm16, 16));
 556     } else {
 557         LOG_DIS("nor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 558     }
 559
 560     if (dc->format == OP_FMT_RI) {
 561         TCGv t0 = tcg_temp_new();
 562         tcg_gen_movi_tl(t0, zero_extend(dc->imm16, 16));
 563         tcg_gen_nor_tl(cpu_R[dc->r1], cpu_R[dc->r0], t0);
 564         tcg_temp_free(t0);
 565     } else {
 566         tcg_gen_nor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 567     }
 568 }
 569
 570 static void dec_or(DisasContext *dc)
 571 {
 572     if (dc->format == OP_FMT_RI) {
 573         LOG_DIS("ori r%d, r%d, %d\n", dc->r1, dc->r0,
 574                 zero_extend(dc->imm16, 16));
 575     } else {
 576         if (dc->r1 == R_R0) {
 577             LOG_DIS("mv r%d, r%d\n", dc->r2, dc->r0);
 578         } else {
 579             LOG_DIS("or r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 580         }
 581     }
 582
 583     if (dc->format == OP_FMT_RI) {
 584         tcg_gen_ori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
 585                 zero_extend(dc->imm16, 16));
 586     } else {
 587         tcg_gen_or_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 588     }
 589 }
 590
 591 static void dec_orhi(DisasContext *dc)
 592 {
 593     if (dc->r0 == R_R0) {
 594         LOG_DIS("mvhi r%d, %d\n", dc->r1, dc->imm16);
 595     } else {
 596         LOG_DIS("orhi r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm16);
 597     }
 598
 599     tcg_gen_ori_tl(cpu_R[dc->r1], cpu_R[dc->r0], (dc->imm16 << 16));
 600 }
 601
 602 static void dec_scall(DisasContext *dc)
 603 {
 604     switch (dc->imm5) {
 605     case 2:
 606         LOG_DIS("break\n");
 607         tcg_gen_movi_tl(cpu_pc, dc->pc);
 608         t_gen_raise_exception(dc, EXCP_BREAKPOINT);
 609         break;
 610     case 7:
 611         LOG_DIS("scall\n");
 612         tcg_gen_movi_tl(cpu_pc, dc->pc);
 613         t_gen_raise_exception(dc, EXCP_SYSTEMCALL);
 614         break;
 615     default:
 616         qemu_log_mask(LOG_GUEST_ERROR, "invalid opcode @0x%x", dc->pc);
 617         t_gen_illegal_insn(dc);
 618         break;
 619     }
 620 }
 621
 622 static void dec_rcsr(DisasContext *dc)
 623 {
 624     LOG_DIS("rcsr r%d, %d\n", dc->r2, dc->csr);
 625
 626     switch (dc->csr) {
 627     case CSR_IE:
 628         tcg_gen_mov_tl(cpu_R[dc->r2], cpu_ie);
 629         break;
 630     case CSR_IM:
 631         gen_helper_rcsr_im(cpu_R[dc->r2], cpu_env);
 632         break;
 633     case CSR_IP:
 634         gen_helper_rcsr_ip(cpu_R[dc->r2], cpu_env);
 635         break;
 636     case CSR_CC:
 637         tcg_gen_mov_tl(cpu_R[dc->r2], cpu_cc);
 638         break;
 639     case CSR_CFG:
 640         tcg_gen_mov_tl(cpu_R[dc->r2], cpu_cfg);
 641         break;
 642     case CSR_EBA:
 643         tcg_gen_mov_tl(cpu_R[dc->r2], cpu_eba);
 644         break;
 645     case CSR_DC:
 646         tcg_gen_mov_tl(cpu_R[dc->r2], cpu_dc);
 647         break;
 648     case CSR_DEBA:
 649         tcg_gen_mov_tl(cpu_R[dc->r2], cpu_deba);
 650         break;
 651     case CSR_JTX:
 652         gen_helper_rcsr_jtx(cpu_R[dc->r2], cpu_env);
 653         break;
 654     case CSR_JRX:
 655         gen_helper_rcsr_jrx(cpu_R[dc->r2], cpu_env);
 656         break;
 657     case CSR_ICC:
 658     case CSR_DCC:
 659     case CSR_BP0:
 660     case CSR_BP1:
 661     case CSR_BP2:
 662     case CSR_BP3:
 663     case CSR_WP0:
 664     case CSR_WP1:
 665     case CSR_WP2:
 666     case CSR_WP3:
 667         qemu_log_mask(LOG_GUEST_ERROR, "invalid read access csr=%x\n", dc->csr);
 668         break;
 669     default:
 670         qemu_log_mask(LOG_GUEST_ERROR, "read_csr: unknown csr=%x\n", dc->csr);
 671         break;
 672     }
 673 }
 674
 675 static void dec_sb(DisasContext *dc)
 676 {
 677     TCGv t0;
 678
 679     LOG_DIS("sb (r%d+%d), r%d\n", dc->r0, dc->imm16, dc->r1);
 680
 681     t0 = tcg_temp_new();
 682     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 683     tcg_gen_qemu_st8(cpu_R[dc->r1], t0, MEM_INDEX);
 684     tcg_temp_free(t0);
 685 }
 686
 687 static void dec_sextb(DisasContext *dc)
 688 {
 689     LOG_DIS("sextb r%d, r%d\n", dc->r2, dc->r0);
 690
 691     if (!(dc->features & LM32_FEATURE_SIGN_EXTEND)) {
 692         qemu_log_mask(LOG_GUEST_ERROR,
 693                       "hardware sign extender is not available\n");
 694         t_gen_illegal_insn(dc);
 695         return;
 696     }
 697
 698     tcg_gen_ext8s_tl(cpu_R[dc->r2], cpu_R[dc->r0]);
 699 }
 700
 701 static void dec_sexth(DisasContext *dc)
 702 {
 703     LOG_DIS("sexth r%d, r%d\n", dc->r2, dc->r0);
 704
 705     if (!(dc->features & LM32_FEATURE_SIGN_EXTEND)) {
 706         qemu_log_mask(LOG_GUEST_ERROR,
 707                       "hardware sign extender is not available\n");
 708         t_gen_illegal_insn(dc);
 709         return;
 710     }
 711
 712     tcg_gen_ext16s_tl(cpu_R[dc->r2], cpu_R[dc->r0]);
 713 }
 714
 715 static void dec_sh(DisasContext *dc)
 716 {
 717     TCGv t0;
 718
 719     LOG_DIS("sh (r%d+%d), r%d\n", dc->r0, dc->imm16, dc->r1);
 720
 721     t0 = tcg_temp_new();
 722     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 723     tcg_gen_qemu_st16(cpu_R[dc->r1], t0, MEM_INDEX);
 724     tcg_temp_free(t0);
 725 }
 726
 727 static void dec_sl(DisasContext *dc)
 728 {
 729     if (dc->format == OP_FMT_RI) {
 730         LOG_DIS("sli r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
 731     } else {
 732         LOG_DIS("sl r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 733     }
 734
 735     if (!(dc->features & LM32_FEATURE_SHIFT)) {
 736         qemu_log_mask(LOG_GUEST_ERROR, "hardware shifter is not available\n");
 737         t_gen_illegal_insn(dc);
 738         return;
 739     }
 740
 741     if (dc->format == OP_FMT_RI) {
 742         tcg_gen_shli_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
 743     } else {
 744         TCGv t0 = tcg_temp_new();
 745         tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
 746         tcg_gen_shl_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
 747         tcg_temp_free(t0);
 748     }
 749 }
 750
 751 static void dec_sr(DisasContext *dc)
 752 {
 753     if (dc->format == OP_FMT_RI) {
 754         LOG_DIS("sri r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
 755     } else {
 756         LOG_DIS("sr r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 757     }
 758
 759     /* The real CPU (w/o hardware shifter) only supports right shift by exactly
 760      * one bit */
 761     if (dc->format == OP_FMT_RI) {
 762         if (!(dc->features & LM32_FEATURE_SHIFT) && (dc->imm5 != 1)) {
 763             qemu_log_mask(LOG_GUEST_ERROR,
 764                     "hardware shifter is not available\n");
 765             t_gen_illegal_insn(dc);
 766             return;
 767         }
 768         tcg_gen_sari_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
 769     } else {
 770         TCGLabel *l1 = gen_new_label();
 771         TCGLabel *l2 = gen_new_label();
 772         TCGv t0 = tcg_temp_local_new();
 773         tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
 774
 775         if (!(dc->features & LM32_FEATURE_SHIFT)) {
 776             tcg_gen_brcondi_tl(TCG_COND_EQ, t0, 1, l1);
 777             t_gen_illegal_insn(dc);
 778             tcg_gen_br(l2);
 779         }
 780
 781         gen_set_label(l1);
 782         tcg_gen_sar_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
 783         gen_set_label(l2);
 784
 785         tcg_temp_free(t0);
 786     }
 787 }
 788
 789 static void dec_sru(DisasContext *dc)
 790 {
 791     if (dc->format == OP_FMT_RI) {
 792         LOG_DIS("srui r%d, r%d, %d\n", dc->r1, dc->r0, dc->imm5);
 793     } else {
 794         LOG_DIS("sru r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 795     }
 796
 797     if (dc->format == OP_FMT_RI) {
 798         if (!(dc->features & LM32_FEATURE_SHIFT) && (dc->imm5 != 1)) {
 799             qemu_log_mask(LOG_GUEST_ERROR,
 800                     "hardware shifter is not available\n");
 801             t_gen_illegal_insn(dc);
 802             return;
 803         }
 804         tcg_gen_shri_tl(cpu_R[dc->r1], cpu_R[dc->r0], dc->imm5);
 805     } else {
 806         TCGLabel *l1 = gen_new_label();
 807         TCGLabel *l2 = gen_new_label();
 808         TCGv t0 = tcg_temp_local_new();
 809         tcg_gen_andi_tl(t0, cpu_R[dc->r1], 0x1f);
 810
 811         if (!(dc->features & LM32_FEATURE_SHIFT)) {
 812             tcg_gen_brcondi_tl(TCG_COND_EQ, t0, 1, l1);
 813             t_gen_illegal_insn(dc);
 814             tcg_gen_br(l2);
 815         }
 816
 817         gen_set_label(l1);
 818         tcg_gen_shr_tl(cpu_R[dc->r2], cpu_R[dc->r0], t0);
 819         gen_set_label(l2);
 820
 821         tcg_temp_free(t0);
 822     }
 823 }
 824
 825 static void dec_sub(DisasContext *dc)
 826 {
 827     LOG_DIS("sub r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 828
 829     tcg_gen_sub_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 830 }
 831
 832 static void dec_sw(DisasContext *dc)
 833 {
 834     TCGv t0;
 835
 836     LOG_DIS("sw (r%d+%d), r%d\n", dc->r0, sign_extend(dc->imm16, 16), dc->r1);
 837
 838     t0 = tcg_temp_new();
 839     tcg_gen_addi_tl(t0, cpu_R[dc->r0], sign_extend(dc->imm16, 16));
 840     tcg_gen_qemu_st32(cpu_R[dc->r1], t0, MEM_INDEX);
 841     tcg_temp_free(t0);
 842 }
 843
 844 static void dec_user(DisasContext *dc)
 845 {
 846     LOG_DIS("user");
 847
 848     qemu_log_mask(LOG_GUEST_ERROR, "user instruction undefined\n");
 849     t_gen_illegal_insn(dc);
 850 }
 851
 852 static void dec_wcsr(DisasContext *dc)
 853 {
 854     int no;
 855
 856     LOG_DIS("wcsr r%d, %d\n", dc->r1, dc->csr);
 857
 858     switch (dc->csr) {
 859     case CSR_IE:
 860         tcg_gen_mov_tl(cpu_ie, cpu_R[dc->r1]);
 861         tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
 862         dc->is_jmp = DISAS_UPDATE;
 863         break;
 864     case CSR_IM:
 865         /* mark as an io operation because it could cause an interrupt */
 866         if (dc->tb->cflags & CF_USE_ICOUNT) {
 867             gen_io_start();
 868         }
 869         gen_helper_wcsr_im(cpu_env, cpu_R[dc->r1]);
 870         tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
 871         if (dc->tb->cflags & CF_USE_ICOUNT) {
 872             gen_io_end();
 873         }
 874         dc->is_jmp = DISAS_UPDATE;
 875         break;
 876     case CSR_IP:
 877         /* mark as an io operation because it could cause an interrupt */
 878         if (dc->tb->cflags & CF_USE_ICOUNT) {
 879             gen_io_start();
 880         }
 881         gen_helper_wcsr_ip(cpu_env, cpu_R[dc->r1]);
 882         tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
 883         if (dc->tb->cflags & CF_USE_ICOUNT) {
 884             gen_io_end();
 885         }
 886         dc->is_jmp = DISAS_UPDATE;
 887         break;
 888     case CSR_ICC:
 889         /* TODO */
 890         break;
 891     case CSR_DCC:
 892         /* TODO */
 893         break;
 894     case CSR_EBA:
 895         tcg_gen_mov_tl(cpu_eba, cpu_R[dc->r1]);
 896         break;
 897     case CSR_DEBA:
 898         tcg_gen_mov_tl(cpu_deba, cpu_R[dc->r1]);
 899         break;
 900     case CSR_JTX:
 901         gen_helper_wcsr_jtx(cpu_env, cpu_R[dc->r1]);
 902         break;
 903     case CSR_JRX:
 904         gen_helper_wcsr_jrx(cpu_env, cpu_R[dc->r1]);
 905         break;
 906     case CSR_DC:
 907         gen_helper_wcsr_dc(cpu_env, cpu_R[dc->r1]);
 908         break;
 909     case CSR_BP0:
 910     case CSR_BP1:
 911     case CSR_BP2:
 912     case CSR_BP3:
 913         no = dc->csr - CSR_BP0;
 914         if (dc->num_breakpoints <= no) {
 915             qemu_log_mask(LOG_GUEST_ERROR,
 916                           "breakpoint #%i is not available\n", no);
 917             t_gen_illegal_insn(dc);
 918             break;
 919         }
 920         gen_helper_wcsr_bp(cpu_env, cpu_R[dc->r1], tcg_const_i32(no));
 921         break;
 922     case CSR_WP0:
 923     case CSR_WP1:
 924     case CSR_WP2:
 925     case CSR_WP3:
 926         no = dc->csr - CSR_WP0;
 927         if (dc->num_watchpoints <= no) {
 928             qemu_log_mask(LOG_GUEST_ERROR,
 929                           "watchpoint #%i is not available\n", no);
 930             t_gen_illegal_insn(dc);
 931             break;
 932         }
 933         gen_helper_wcsr_wp(cpu_env, cpu_R[dc->r1], tcg_const_i32(no));
 934         break;
 935     case CSR_CC:
 936     case CSR_CFG:
 937         qemu_log_mask(LOG_GUEST_ERROR, "invalid write access csr=%x\n",
 938                       dc->csr);
 939         break;
 940     default:
 941         qemu_log_mask(LOG_GUEST_ERROR, "write_csr: unknown csr=%x\n",
 942                       dc->csr);
 943         break;
 944     }
 945 }
 946
 947 static void dec_xnor(DisasContext *dc)
 948 {
 949     if (dc->format == OP_FMT_RI) {
 950         LOG_DIS("xnori r%d, r%d, %d\n", dc->r0, dc->r1,
 951                 zero_extend(dc->imm16, 16));
 952     } else {
 953         if (dc->r1 == R_R0) {
 954             LOG_DIS("not r%d, r%d\n", dc->r2, dc->r0);
 955         } else {
 956             LOG_DIS("xnor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 957         }
 958     }
 959
 960     if (dc->format == OP_FMT_RI) {
 961         tcg_gen_xori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
 962                 zero_extend(dc->imm16, 16));
 963         tcg_gen_not_tl(cpu_R[dc->r1], cpu_R[dc->r1]);
 964     } else {
 965         tcg_gen_eqv_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 966     }
 967 }
 968
 969 static void dec_xor(DisasContext *dc)
 970 {
 971     if (dc->format == OP_FMT_RI) {
 972         LOG_DIS("xori r%d, r%d, %d\n", dc->r0, dc->r1,
 973                 zero_extend(dc->imm16, 16));
 974     } else {
 975         LOG_DIS("xor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
 976     }
 977
 978     if (dc->format == OP_FMT_RI) {
 979         tcg_gen_xori_tl(cpu_R[dc->r1], cpu_R[dc->r0],
 980                 zero_extend(dc->imm16, 16));
 981     } else {
 982         tcg_gen_xor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
 983     }
 984 }
 985
 986 static void dec_ill(DisasContext *dc)
 987 {
 988     qemu_log_mask(LOG_GUEST_ERROR, "invalid opcode 0x%02x\n", dc->opcode);
 989     t_gen_illegal_insn(dc);
 990 }
 991
 992 typedef void (*DecoderInfo)(DisasContext *dc);
 993 static const DecoderInfo decinfo[] = {
 994     dec_sru, dec_nor, dec_mul, dec_sh, dec_lb, dec_sr, dec_xor, dec_lh,
 995     dec_and, dec_xnor, dec_lw, dec_lhu, dec_sb, dec_add, dec_or, dec_sl,
 996     dec_lbu, dec_be, dec_bg, dec_bge, dec_bgeu, dec_bgu, dec_sw, dec_bne,
 997     dec_andhi, dec_cmpe, dec_cmpg, dec_cmpge, dec_cmpgeu, dec_cmpgu, dec_orhi,
 998     dec_cmpne,
 999     dec_sru, dec_nor, dec_mul, dec_divu, dec_rcsr, dec_sr, dec_xor, dec_ill,
1000     dec_and, dec_xnor, dec_ill, dec_scall, dec_sextb, dec_add, dec_or, dec_sl,
1001     dec_b, dec_modu, dec_sub, dec_user, dec_wcsr, dec_ill, dec_call, dec_sexth,
1002     dec_bi, dec_cmpe, dec_cmpg, dec_cmpge, dec_cmpgeu, dec_cmpgu, dec_calli,
1003     dec_cmpne
1004 };
1005
1006 static inline void decode(DisasContext *dc, uint32_t ir)
1007 {
1008     if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
1009         tcg_gen_debug_insn_start(dc->pc);
1010     }
1011
1012     dc->ir = ir;
1013     LOG_DIS("%8.8x\t", dc->ir);
1014
1015     dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1016
1017     dc->imm5 = EXTRACT_FIELD(ir, 0, 4);
1018     dc->imm16 = EXTRACT_FIELD(ir, 0, 15);
1019     dc->imm26 = EXTRACT_FIELD(ir, 0, 25);
1020
1021     dc->csr = EXTRACT_FIELD(ir, 21, 25);
1022     dc->r0 = EXTRACT_FIELD(ir, 21, 25);
1023     dc->r1 = EXTRACT_FIELD(ir, 16, 20);
1024     dc->r2 = EXTRACT_FIELD(ir, 11, 15);
1025
1026     /* bit 31 seems to indicate insn type.  */
1027     if (ir & (1 << 31)) {
1028         dc->format = OP_FMT_RR;
1029     } else {
1030         dc->format = OP_FMT_RI;
1031     }
1032
1033     assert(ARRAY_SIZE(decinfo) == 64);
1034     assert(dc->opcode < 64);
1035
1036     decinfo[dc->opcode](dc);
1037 }
1038
1039 static void check_breakpoint(CPULM32State *env, DisasContext *dc)
1040 {
1041     CPUState *cs = CPU(lm32_env_get_cpu(env));
1042     CPUBreakpoint *bp;
1043
1044     if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
1045         QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
1046             if (bp->pc == dc->pc) {
1047                 tcg_gen_movi_tl(cpu_pc, dc->pc);
1048                 t_gen_raise_exception(dc, EXCP_DEBUG);
1049                 dc->is_jmp = DISAS_UPDATE;
1050              }
1051         }
1052     }
1053 }
1054
1055 /* generate intermediate code for basic block 'tb'.  */
1056 static inline
1057 void gen_intermediate_code_internal(LM32CPU *cpu,
1058                                     TranslationBlock *tb, bool search_pc)
1059 {
1060     CPUState *cs = CPU(cpu);
1061     CPULM32State *env = &cpu->env;
1062     struct DisasContext ctx, *dc = &ctx;
1063     uint32_t pc_start;
1064     int j, lj;
1065     uint32_t next_page_start;
1066     int num_insns;
1067     int max_insns;
1068
1069     pc_start = tb->pc;
1070     dc->features = cpu->features;
1071     dc->num_breakpoints = cpu->num_breakpoints;
1072     dc->num_watchpoints = cpu->num_watchpoints;
1073     dc->tb = tb;
1074
1075     dc->is_jmp = DISAS_NEXT;
1076     dc->pc = pc_start;
1077     dc->singlestep_enabled = cs->singlestep_enabled;
1078
1079     if (pc_start & 3) {
1080         qemu_log_mask(LOG_GUEST_ERROR,
1081                       "unaligned PC=%x. Ignoring lowest bits.\n", pc_start);
1082         pc_start &= ~3;
1083     }
1084
1085     next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1086     lj = -1;
1087     num_insns = 0;
1088     max_insns = tb->cflags & CF_COUNT_MASK;
1089     if (max_insns == 0) {
1090         max_insns = CF_COUNT_MASK;
1091     }
1092
1093     gen_tb_start(tb);
1094     do {
1095         check_breakpoint(env, dc);
1096
1097         if (search_pc) {
1098             j = tcg_op_buf_count();
1099             if (lj < j) {
1100                 lj++;
1101                 while (lj < j) {
1102                     tcg_ctx.gen_opc_instr_start[lj++] = 0;
1103                 }
1104             }
1105             tcg_ctx.gen_opc_pc[lj] = dc->pc;
1106             tcg_ctx.gen_opc_instr_start[lj] = 1;
1107             tcg_ctx.gen_opc_icount[lj] = num_insns;
1108         }
1109
1110         /* Pretty disas.  */
1111         LOG_DIS("%8.8x:\t", dc->pc);
1112
1113         if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) {
1114             gen_io_start();
1115         }
1116
1117         decode(dc, cpu_ldl_code(env, dc->pc));
1118         dc->pc += 4;
1119         num_insns++;
1120
1121     } while (!dc->is_jmp
1122          && !tcg_op_buf_full()
1123          && !cs->singlestep_enabled
1124          && !singlestep
1125          && (dc->pc < next_page_start)
1126          && num_insns < max_insns);
1127
1128     if (tb->cflags & CF_LAST_IO) {
1129         gen_io_end();
1130     }
1131
1132     if (unlikely(cs->singlestep_enabled)) {
1133         if (dc->is_jmp == DISAS_NEXT) {
1134             tcg_gen_movi_tl(cpu_pc, dc->pc);
1135         }
1136         t_gen_raise_exception(dc, EXCP_DEBUG);
1137     } else {
1138         switch (dc->is_jmp) {
1139         case DISAS_NEXT:
1140             gen_goto_tb(dc, 1, dc->pc);
1141             break;
1142         default:
1143         case DISAS_JUMP:
1144         case DISAS_UPDATE:
1145             /* indicate that the hash table must be used
1146                to find the next TB */
1147             tcg_gen_exit_tb(0);
1148             break;
1149         case DISAS_TB_JUMP:
1150             /* nothing more to generate */
1151             break;
1152         }
1153     }
1154
1155     gen_tb_end(tb, num_insns);
1156
1157     if (search_pc) {
1158         j = tcg_op_buf_count();
1159         lj++;
1160         while (lj <= j) {
1161             tcg_ctx.gen_opc_instr_start[lj++] = 0;
1162         }
1163     } else {
1164         tb->size = dc->pc - pc_start;
1165         tb->icount = num_insns;
1166     }
1167
1168 #ifdef DEBUG_DISAS
1169     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1170         qemu_log("\n");
1171         log_target_disas(env, pc_start, dc->pc - pc_start, 0);
1172         qemu_log("\nisize=%d osize=%d\n",
1173                  dc->pc - pc_start, tcg_op_buf_count());
1174     }
1175 #endif
1176 }
1177
1178 void gen_intermediate_code(CPULM32State *env, struct TranslationBlock *tb)
1179 {
1180     gen_intermediate_code_internal(lm32_env_get_cpu(env), tb, false);
1181 }
1182
1183 void gen_intermediate_code_pc(CPULM32State *env, struct TranslationBlock *tb)
1184 {
1185     gen_intermediate_code_internal(lm32_env_get_cpu(env), tb, true);
1186 }
1187
1188 void lm32_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
1189                          int flags)
1190 {
1191     LM32CPU *cpu = LM32_CPU(cs);
1192     CPULM32State *env = &cpu->env;
1193     int i;
1194
1195     if (!env || !f) {
1196         return;
1197     }
1198
1199     cpu_fprintf(f, "IN: PC=%x %s\n",
1200                 env->pc, lookup_symbol(env->pc));
1201
1202     cpu_fprintf(f, "ie=%8.8x (IE=%x EIE=%x BIE=%x) im=%8.8x ip=%8.8x\n",
1203              env->ie,
1204              (env->ie & IE_IE) ? 1 : 0,
1205              (env->ie & IE_EIE) ? 1 : 0,
1206              (env->ie & IE_BIE) ? 1 : 0,
1207              lm32_pic_get_im(env->pic_state),
1208              lm32_pic_get_ip(env->pic_state));
1209     cpu_fprintf(f, "eba=%8.8x deba=%8.8x\n",
1210              env->eba,
1211              env->deba);
1212
1213     for (i = 0; i < 32; i++) {
1214         cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1215         if ((i + 1) % 4 == 0) {
1216             cpu_fprintf(f, "\n");
1217         }
1218     }
1219     cpu_fprintf(f, "\n\n");
1220 }
1221
1222 void restore_state_to_opc(CPULM32State *env, TranslationBlock *tb, int pc_pos)
1223 {
1224     env->pc = tcg_ctx.gen_opc_pc[pc_pos];
1225 }
1226
1227 void lm32_translate_init(void)
1228 {
1229     int i;
1230
1231     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1232
1233     for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1234         cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1235                           offsetof(CPULM32State, regs[i]),
1236                           regnames[i]);
1237     }
1238
1239     for (i = 0; i < ARRAY_SIZE(cpu_bp); i++) {
1240         cpu_bp[i] = tcg_global_mem_new(TCG_AREG0,
1241                           offsetof(CPULM32State, bp[i]),
1242                           regnames[32+i]);
1243     }
1244
1245     for (i = 0; i < ARRAY_SIZE(cpu_wp); i++) {
1246         cpu_wp[i] = tcg_global_mem_new(TCG_AREG0,
1247                           offsetof(CPULM32State, wp[i]),
1248                           regnames[36+i]);
1249     }
1250
1251     cpu_pc = tcg_global_mem_new(TCG_AREG0,
1252                     offsetof(CPULM32State, pc),
1253                     "pc");
1254     cpu_ie = tcg_global_mem_new(TCG_AREG0,
1255                     offsetof(CPULM32State, ie),
1256                     "ie");
1257     cpu_icc = tcg_global_mem_new(TCG_AREG0,
1258                     offsetof(CPULM32State, icc),
1259                     "icc");
1260     cpu_dcc = tcg_global_mem_new(TCG_AREG0,
1261                     offsetof(CPULM32State, dcc),
1262                     "dcc");
1263     cpu_cc = tcg_global_mem_new(TCG_AREG0,
1264                     offsetof(CPULM32State, cc),
1265                     "cc");
1266     cpu_cfg = tcg_global_mem_new(TCG_AREG0,
1267                     offsetof(CPULM32State, cfg),
1268                     "cfg");
1269     cpu_eba = tcg_global_mem_new(TCG_AREG0,
1270                     offsetof(CPULM32State, eba),
1271                     "eba");
1272     cpu_dc = tcg_global_mem_new(TCG_AREG0,
1273                     offsetof(CPULM32State, dc),
1274                     "dc");
1275     cpu_deba = tcg_global_mem_new(TCG_AREG0,
1276                     offsetof(CPULM32State, deba),
1277                     "deba");
1278 }
1279