target/moxie/translate.c

   1 /*
   2  *  Moxie emulation for qemu: main translation routines.
   3  *
   4  *  Copyright (c) 2009, 2013 Anthony Green
   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 License
   8  * as published by the Free Software Foundation; either version 2 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful, but
  12  * 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 General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /* For information on the Moxie architecture, see
  21  *    http://moxielogic.org/wiki
  22  */
  23
  24 #include "qemu/osdep.h"
  25
  26 #include "cpu.h"
  27 #include "exec/exec-all.h"
  28 #include "disas/disas.h"
  29 #include "tcg-op.h"
  30 #include "exec/cpu_ldst.h"
  31
  32 #include "exec/helper-proto.h"
  33 #include "exec/helper-gen.h"
  34 #include "exec/log.h"
  35
  36 /* This is the state at translation time.  */
  37 typedef struct DisasContext {
  38     struct TranslationBlock *tb;
  39     target_ulong pc, saved_pc;
  40     uint32_t opcode;
  41     uint32_t fp_status;
  42     /* Routine used to access memory */
  43     int memidx;
  44     int bstate;
  45     target_ulong btarget;
  46     int singlestep_enabled;
  47 } DisasContext;
  48
  49 enum {
  50     BS_NONE     = 0, /* We go out of the TB without reaching a branch or an
  51                       * exception condition */
  52     BS_STOP     = 1, /* We want to stop translation for any reason */
  53     BS_BRANCH   = 2, /* We reached a branch condition     */
  54     BS_EXCP     = 3, /* We reached an exception condition */
  55 };
  56
  57 static TCGv cpu_pc;
  58 static TCGv cpu_gregs[16];
  59 static TCGv cc_a, cc_b;
  60
  61 #include "exec/gen-icount.h"
  62
  63 #define REG(x) (cpu_gregs[x])
  64
  65 /* Extract the signed 10-bit offset from a 16-bit branch
  66    instruction.  */
  67 static int extract_branch_offset(int opcode)
  68 {
  69   return (((signed short)((opcode & ((1 << 10) - 1)) << 6)) >> 6) << 1;
  70 }
  71
  72 void moxie_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
  73                           int flags)
  74 {
  75     MoxieCPU *cpu = MOXIE_CPU(cs);
  76     CPUMoxieState *env = &cpu->env;
  77     int i;
  78     cpu_fprintf(f, "pc=0x%08x\n", env->pc);
  79     cpu_fprintf(f, "$fp=0x%08x $sp=0x%08x $r0=0x%08x $r1=0x%08x\n",
  80                 env->gregs[0], env->gregs[1], env->gregs[2], env->gregs[3]);
  81     for (i = 4; i < 16; i += 4) {
  82         cpu_fprintf(f, "$r%d=0x%08x $r%d=0x%08x $r%d=0x%08x $r%d=0x%08x\n",
  83                     i-2, env->gregs[i], i-1, env->gregs[i + 1],
  84                     i, env->gregs[i + 2], i+1, env->gregs[i + 3]);
  85     }
  86     for (i = 4; i < 16; i += 4) {
  87         cpu_fprintf(f, "sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x\n",
  88                     i-2, env->sregs[i], i-1, env->sregs[i + 1],
  89                     i, env->sregs[i + 2], i+1, env->sregs[i + 3]);
  90     }
  91 }
  92
  93 void moxie_translate_init(void)
  94 {
  95     int i;
  96     static const char * const gregnames[16] = {
  97         "$fp", "$sp", "$r0", "$r1",
  98         "$r2", "$r3", "$r4", "$r5",
  99         "$r6", "$r7", "$r8", "$r9",
 100         "$r10", "$r11", "$r12", "$r13"
 101     };
 102
 103     cpu_pc = tcg_global_mem_new_i32(cpu_env,
 104                                     offsetof(CPUMoxieState, pc), "$pc");
 105     for (i = 0; i < 16; i++)
 106         cpu_gregs[i] = tcg_global_mem_new_i32(cpu_env,
 107                                               offsetof(CPUMoxieState, gregs[i]),
 108                                               gregnames[i]);
 109
 110     cc_a = tcg_global_mem_new_i32(cpu_env,
 111                                   offsetof(CPUMoxieState, cc_a), "cc_a");
 112     cc_b = tcg_global_mem_new_i32(cpu_env,
 113                                   offsetof(CPUMoxieState, cc_b), "cc_b");
 114 }
 115
 116 static inline bool use_goto_tb(DisasContext *ctx, target_ulong dest)
 117 {
 118     if (unlikely(ctx->singlestep_enabled)) {
 119         return false;
 120     }
 121
 122 #ifndef CONFIG_USER_ONLY
 123     return (ctx->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
 124 #else
 125     return true;
 126 #endif
 127 }
 128
 129 static inline void gen_goto_tb(CPUMoxieState *env, DisasContext *ctx,
 130                                int n, target_ulong dest)
 131 {
 132     if (use_goto_tb(ctx, dest)) {
 133         tcg_gen_goto_tb(n);
 134         tcg_gen_movi_i32(cpu_pc, dest);
 135         tcg_gen_exit_tb(ctx->tb, n);
 136     } else {
 137         tcg_gen_movi_i32(cpu_pc, dest);
 138         if (ctx->singlestep_enabled) {
 139             gen_helper_debug(cpu_env);
 140         }
 141         tcg_gen_exit_tb(NULL, 0);
 142     }
 143 }
 144
 145 static int decode_opc(MoxieCPU *cpu, DisasContext *ctx)
 146 {
 147     CPUMoxieState *env = &cpu->env;
 148
 149     /* Local cache for the instruction opcode.  */
 150     int opcode;
 151     /* Set the default instruction length.  */
 152     int length = 2;
 153
 154     /* Examine the 16-bit opcode.  */
 155     opcode = ctx->opcode;
 156
 157     /* Decode instruction.  */
 158     if (opcode & (1 << 15)) {
 159         if (opcode & (1 << 14)) {
 160             /* This is a Form 3 instruction.  */
 161             int inst = (opcode >> 10 & 0xf);
 162
 163 #define BRANCH(cond)                                                         \
 164     do {                                                                     \
 165         TCGLabel *l1 = gen_new_label();                                      \
 166         tcg_gen_brcond_i32(cond, cc_a, cc_b, l1);                            \
 167         gen_goto_tb(env, ctx, 1, ctx->pc+2);                                 \
 168         gen_set_label(l1);                                                   \
 169         gen_goto_tb(env, ctx, 0, extract_branch_offset(opcode) + ctx->pc+2); \
 170         ctx->bstate = BS_BRANCH;                                             \
 171     } while (0)
 172
 173             switch (inst) {
 174             case 0x00: /* beq */
 175                 BRANCH(TCG_COND_EQ);
 176                 break;
 177             case 0x01: /* bne */
 178                 BRANCH(TCG_COND_NE);
 179                 break;
 180             case 0x02: /* blt */
 181                 BRANCH(TCG_COND_LT);
 182                 break;
 183             case 0x03: /* bgt */
 184                 BRANCH(TCG_COND_GT);
 185                 break;
 186             case 0x04: /* bltu */
 187                 BRANCH(TCG_COND_LTU);
 188                 break;
 189             case 0x05: /* bgtu */
 190                 BRANCH(TCG_COND_GTU);
 191                 break;
 192             case 0x06: /* bge */
 193                 BRANCH(TCG_COND_GE);
 194                 break;
 195             case 0x07: /* ble */
 196                 BRANCH(TCG_COND_LE);
 197                 break;
 198             case 0x08: /* bgeu */
 199                 BRANCH(TCG_COND_GEU);
 200                 break;
 201             case 0x09: /* bleu */
 202                 BRANCH(TCG_COND_LEU);
 203                 break;
 204             default:
 205                 {
 206                     TCGv temp = tcg_temp_new_i32();
 207                     tcg_gen_movi_i32(cpu_pc, ctx->pc);
 208                     tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
 209                     gen_helper_raise_exception(cpu_env, temp);
 210                     tcg_temp_free_i32(temp);
 211                 }
 212                 break;
 213             }
 214         } else {
 215             /* This is a Form 2 instruction.  */
 216             int inst = (opcode >> 12 & 0x3);
 217             switch (inst) {
 218             case 0x00: /* inc */
 219                 {
 220                     int a = (opcode >> 8) & 0xf;
 221                     unsigned int v = (opcode & 0xff);
 222                     tcg_gen_addi_i32(REG(a), REG(a), v);
 223                 }
 224                 break;
 225             case 0x01: /* dec */
 226                 {
 227                     int a = (opcode >> 8) & 0xf;
 228                     unsigned int v = (opcode & 0xff);
 229                     tcg_gen_subi_i32(REG(a), REG(a), v);
 230                 }
 231                 break;
 232             case 0x02: /* gsr */
 233                 {
 234                     int a = (opcode >> 8) & 0xf;
 235                     unsigned v = (opcode & 0xff);
 236                     tcg_gen_ld_i32(REG(a), cpu_env,
 237                                    offsetof(CPUMoxieState, sregs[v]));
 238                 }
 239                 break;
 240             case 0x03: /* ssr */
 241                 {
 242                     int a = (opcode >> 8) & 0xf;
 243                     unsigned v = (opcode & 0xff);
 244                     tcg_gen_st_i32(REG(a), cpu_env,
 245                                    offsetof(CPUMoxieState, sregs[v]));
 246                 }
 247                 break;
 248             default:
 249                 {
 250                     TCGv temp = tcg_temp_new_i32();
 251                     tcg_gen_movi_i32(cpu_pc, ctx->pc);
 252                     tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
 253                     gen_helper_raise_exception(cpu_env, temp);
 254                     tcg_temp_free_i32(temp);
 255                 }
 256                 break;
 257             }
 258         }
 259     } else {
 260         /* This is a Form 1 instruction.  */
 261         int inst = opcode >> 8;
 262         switch (inst) {
 263         case 0x00: /* nop */
 264             break;
 265         case 0x01: /* ldi.l (immediate) */
 266             {
 267                 int reg = (opcode >> 4) & 0xf;
 268                 int val = cpu_ldl_code(env, ctx->pc+2);
 269                 tcg_gen_movi_i32(REG(reg), val);
 270                 length = 6;
 271             }
 272             break;
 273         case 0x02: /* mov (register-to-register) */
 274             {
 275                 int dest  = (opcode >> 4) & 0xf;
 276                 int src = opcode & 0xf;
 277                 tcg_gen_mov_i32(REG(dest), REG(src));
 278             }
 279             break;
 280         case 0x03: /* jsra */
 281             {
 282                 TCGv t1 = tcg_temp_new_i32();
 283                 TCGv t2 = tcg_temp_new_i32();
 284
 285                 tcg_gen_movi_i32(t1, ctx->pc + 6);
 286
 287                 /* Make space for the static chain and return address.  */
 288                 tcg_gen_subi_i32(t2, REG(1), 8);
 289                 tcg_gen_mov_i32(REG(1), t2);
 290                 tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
 291
 292                 /* Push the current frame pointer.  */
 293                 tcg_gen_subi_i32(t2, REG(1), 4);
 294                 tcg_gen_mov_i32(REG(1), t2);
 295                 tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
 296
 297                 /* Set the pc and $fp.  */
 298                 tcg_gen_mov_i32(REG(0), REG(1));
 299
 300                 gen_goto_tb(env, ctx, 0, cpu_ldl_code(env, ctx->pc+2));
 301
 302                 tcg_temp_free_i32(t1);
 303                 tcg_temp_free_i32(t2);
 304
 305                 ctx->bstate = BS_BRANCH;
 306                 length = 6;
 307             }
 308             break;
 309         case 0x04: /* ret */
 310             {
 311                 TCGv t1 = tcg_temp_new_i32();
 312
 313                 /* The new $sp is the old $fp.  */
 314                 tcg_gen_mov_i32(REG(1), REG(0));
 315
 316                 /* Pop the frame pointer.  */
 317                 tcg_gen_qemu_ld32u(REG(0), REG(1), ctx->memidx);
 318                 tcg_gen_addi_i32(t1, REG(1), 4);
 319                 tcg_gen_mov_i32(REG(1), t1);
 320
 321
 322                 /* Pop the return address and skip over the static chain
 323                    slot.  */
 324                 tcg_gen_qemu_ld32u(cpu_pc, REG(1), ctx->memidx);
 325                 tcg_gen_addi_i32(t1, REG(1), 8);
 326                 tcg_gen_mov_i32(REG(1), t1);
 327
 328                 tcg_temp_free_i32(t1);
 329
 330                 /* Jump... */
 331                 tcg_gen_exit_tb(NULL, 0);
 332
 333                 ctx->bstate = BS_BRANCH;
 334             }
 335             break;
 336         case 0x05: /* add.l */
 337             {
 338                 int a = (opcode >> 4) & 0xf;
 339                 int b = opcode & 0xf;
 340
 341                 tcg_gen_add_i32(REG(a), REG(a), REG(b));
 342             }
 343             break;
 344         case 0x06: /* push */
 345             {
 346                 int a = (opcode >> 4) & 0xf;
 347                 int b = opcode & 0xf;
 348
 349                 TCGv t1 = tcg_temp_new_i32();
 350                 tcg_gen_subi_i32(t1, REG(a), 4);
 351                 tcg_gen_mov_i32(REG(a), t1);
 352                 tcg_gen_qemu_st32(REG(b), REG(a), ctx->memidx);
 353                 tcg_temp_free_i32(t1);
 354             }
 355             break;
 356         case 0x07: /* pop */
 357             {
 358                 int a = (opcode >> 4) & 0xf;
 359                 int b = opcode & 0xf;
 360                 TCGv t1 = tcg_temp_new_i32();
 361
 362                 tcg_gen_qemu_ld32u(REG(b), REG(a), ctx->memidx);
 363                 tcg_gen_addi_i32(t1, REG(a), 4);
 364                 tcg_gen_mov_i32(REG(a), t1);
 365                 tcg_temp_free_i32(t1);
 366             }
 367             break;
 368         case 0x08: /* lda.l */
 369             {
 370                 int reg = (opcode >> 4) & 0xf;
 371
 372                 TCGv ptr = tcg_temp_new_i32();
 373                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 374                 tcg_gen_qemu_ld32u(REG(reg), ptr, ctx->memidx);
 375                 tcg_temp_free_i32(ptr);
 376
 377                 length = 6;
 378             }
 379             break;
 380         case 0x09: /* sta.l */
 381             {
 382                 int val = (opcode >> 4) & 0xf;
 383
 384                 TCGv ptr = tcg_temp_new_i32();
 385                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 386                 tcg_gen_qemu_st32(REG(val), ptr, ctx->memidx);
 387                 tcg_temp_free_i32(ptr);
 388
 389                 length = 6;
 390             }
 391             break;
 392         case 0x0a: /* ld.l (register indirect) */
 393             {
 394                 int src  = opcode & 0xf;
 395                 int dest = (opcode >> 4) & 0xf;
 396
 397                 tcg_gen_qemu_ld32u(REG(dest), REG(src), ctx->memidx);
 398             }
 399             break;
 400         case 0x0b: /* st.l */
 401             {
 402                 int dest = (opcode >> 4) & 0xf;
 403                 int val  = opcode & 0xf;
 404
 405                 tcg_gen_qemu_st32(REG(val), REG(dest), ctx->memidx);
 406             }
 407             break;
 408         case 0x0c: /* ldo.l */
 409             {
 410                 int a = (opcode >> 4) & 0xf;
 411                 int b = opcode & 0xf;
 412
 413                 TCGv t1 = tcg_temp_new_i32();
 414                 TCGv t2 = tcg_temp_new_i32();
 415                 tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
 416                 tcg_gen_qemu_ld32u(t2, t1, ctx->memidx);
 417                 tcg_gen_mov_i32(REG(a), t2);
 418
 419                 tcg_temp_free_i32(t1);
 420                 tcg_temp_free_i32(t2);
 421
 422                 length = 6;
 423             }
 424             break;
 425         case 0x0d: /* sto.l */
 426             {
 427                 int a = (opcode >> 4) & 0xf;
 428                 int b = opcode & 0xf;
 429
 430                 TCGv t1 = tcg_temp_new_i32();
 431                 TCGv t2 = tcg_temp_new_i32();
 432                 tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
 433                 tcg_gen_qemu_st32(REG(b), t1, ctx->memidx);
 434
 435                 tcg_temp_free_i32(t1);
 436                 tcg_temp_free_i32(t2);
 437
 438                 length = 6;
 439             }
 440             break;
 441         case 0x0e: /* cmp */
 442             {
 443                 int a  = (opcode >> 4) & 0xf;
 444                 int b  = opcode & 0xf;
 445
 446                 tcg_gen_mov_i32(cc_a, REG(a));
 447                 tcg_gen_mov_i32(cc_b, REG(b));
 448             }
 449             break;
 450         case 0x19: /* jsr */
 451             {
 452                 int fnreg = (opcode >> 4) & 0xf;
 453
 454                 /* Load the stack pointer into T0.  */
 455                 TCGv t1 = tcg_temp_new_i32();
 456                 TCGv t2 = tcg_temp_new_i32();
 457
 458                 tcg_gen_movi_i32(t1, ctx->pc+2);
 459
 460                 /* Make space for the static chain and return address.  */
 461                 tcg_gen_subi_i32(t2, REG(1), 8);
 462                 tcg_gen_mov_i32(REG(1), t2);
 463                 tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
 464
 465                 /* Push the current frame pointer.  */
 466                 tcg_gen_subi_i32(t2, REG(1), 4);
 467                 tcg_gen_mov_i32(REG(1), t2);
 468                 tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
 469
 470                 /* Set the pc and $fp.  */
 471                 tcg_gen_mov_i32(REG(0), REG(1));
 472                 tcg_gen_mov_i32(cpu_pc, REG(fnreg));
 473                 tcg_temp_free_i32(t1);
 474                 tcg_temp_free_i32(t2);
 475                 tcg_gen_exit_tb(NULL, 0);
 476                 ctx->bstate = BS_BRANCH;
 477             }
 478             break;
 479         case 0x1a: /* jmpa */
 480             {
 481                 tcg_gen_movi_i32(cpu_pc, cpu_ldl_code(env, ctx->pc+2));
 482                 tcg_gen_exit_tb(NULL, 0);
 483                 ctx->bstate = BS_BRANCH;
 484                 length = 6;
 485             }
 486             break;
 487         case 0x1b: /* ldi.b (immediate) */
 488             {
 489                 int reg = (opcode >> 4) & 0xf;
 490                 int val = cpu_ldl_code(env, ctx->pc+2);
 491                 tcg_gen_movi_i32(REG(reg), val);
 492                 length = 6;
 493             }
 494             break;
 495         case 0x1c: /* ld.b (register indirect) */
 496             {
 497                 int src  = opcode & 0xf;
 498                 int dest = (opcode >> 4) & 0xf;
 499
 500                 tcg_gen_qemu_ld8u(REG(dest), REG(src), ctx->memidx);
 501             }
 502             break;
 503         case 0x1d: /* lda.b */
 504             {
 505                 int reg = (opcode >> 4) & 0xf;
 506
 507                 TCGv ptr = tcg_temp_new_i32();
 508                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 509                 tcg_gen_qemu_ld8u(REG(reg), ptr, ctx->memidx);
 510                 tcg_temp_free_i32(ptr);
 511
 512                 length = 6;
 513             }
 514             break;
 515         case 0x1e: /* st.b */
 516             {
 517                 int dest = (opcode >> 4) & 0xf;
 518                 int val  = opcode & 0xf;
 519
 520                 tcg_gen_qemu_st8(REG(val), REG(dest), ctx->memidx);
 521             }
 522             break;
 523         case 0x1f: /* sta.b */
 524             {
 525                 int val = (opcode >> 4) & 0xf;
 526
 527                 TCGv ptr = tcg_temp_new_i32();
 528                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 529                 tcg_gen_qemu_st8(REG(val), ptr, ctx->memidx);
 530                 tcg_temp_free_i32(ptr);
 531
 532                 length = 6;
 533             }
 534             break;
 535         case 0x20: /* ldi.s (immediate) */
 536             {
 537                 int reg = (opcode >> 4) & 0xf;
 538                 int val = cpu_ldl_code(env, ctx->pc+2);
 539                 tcg_gen_movi_i32(REG(reg), val);
 540                 length = 6;
 541             }
 542             break;
 543         case 0x21: /* ld.s (register indirect) */
 544             {
 545                 int src  = opcode & 0xf;
 546                 int dest = (opcode >> 4) & 0xf;
 547
 548                 tcg_gen_qemu_ld16u(REG(dest), REG(src), ctx->memidx);
 549             }
 550             break;
 551         case 0x22: /* lda.s */
 552             {
 553                 int reg = (opcode >> 4) & 0xf;
 554
 555                 TCGv ptr = tcg_temp_new_i32();
 556                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 557                 tcg_gen_qemu_ld16u(REG(reg), ptr, ctx->memidx);
 558                 tcg_temp_free_i32(ptr);
 559
 560                 length = 6;
 561             }
 562             break;
 563         case 0x23: /* st.s */
 564             {
 565                 int dest = (opcode >> 4) & 0xf;
 566                 int val  = opcode & 0xf;
 567
 568                 tcg_gen_qemu_st16(REG(val), REG(dest), ctx->memidx);
 569             }
 570             break;
 571         case 0x24: /* sta.s */
 572             {
 573                 int val = (opcode >> 4) & 0xf;
 574
 575                 TCGv ptr = tcg_temp_new_i32();
 576                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 577                 tcg_gen_qemu_st16(REG(val), ptr, ctx->memidx);
 578                 tcg_temp_free_i32(ptr);
 579
 580                 length = 6;
 581             }
 582             break;
 583         case 0x25: /* jmp */
 584             {
 585                 int reg = (opcode >> 4) & 0xf;
 586                 tcg_gen_mov_i32(cpu_pc, REG(reg));
 587                 tcg_gen_exit_tb(NULL, 0);
 588                 ctx->bstate = BS_BRANCH;
 589             }
 590             break;
 591         case 0x26: /* and */
 592             {
 593                 int a = (opcode >> 4) & 0xf;
 594                 int b = opcode & 0xf;
 595
 596                 tcg_gen_and_i32(REG(a), REG(a), REG(b));
 597             }
 598             break;
 599         case 0x27: /* lshr */
 600             {
 601                 int a = (opcode >> 4) & 0xf;
 602                 int b = opcode & 0xf;
 603
 604                 TCGv sv = tcg_temp_new_i32();
 605                 tcg_gen_andi_i32(sv, REG(b), 0x1f);
 606                 tcg_gen_shr_i32(REG(a), REG(a), sv);
 607                 tcg_temp_free_i32(sv);
 608             }
 609             break;
 610         case 0x28: /* ashl */
 611             {
 612                 int a = (opcode >> 4) & 0xf;
 613                 int b = opcode & 0xf;
 614
 615                 TCGv sv = tcg_temp_new_i32();
 616                 tcg_gen_andi_i32(sv, REG(b), 0x1f);
 617                 tcg_gen_shl_i32(REG(a), REG(a), sv);
 618                 tcg_temp_free_i32(sv);
 619             }
 620             break;
 621         case 0x29: /* sub.l */
 622             {
 623                 int a = (opcode >> 4) & 0xf;
 624                 int b = opcode & 0xf;
 625
 626                 tcg_gen_sub_i32(REG(a), REG(a), REG(b));
 627             }
 628             break;
 629         case 0x2a: /* neg */
 630             {
 631                 int a = (opcode >> 4) & 0xf;
 632                 int b = opcode & 0xf;
 633
 634                 tcg_gen_neg_i32(REG(a), REG(b));
 635             }
 636             break;
 637         case 0x2b: /* or */
 638             {
 639                 int a = (opcode >> 4) & 0xf;
 640                 int b = opcode & 0xf;
 641
 642                 tcg_gen_or_i32(REG(a), REG(a), REG(b));
 643             }
 644             break;
 645         case 0x2c: /* not */
 646             {
 647                 int a = (opcode >> 4) & 0xf;
 648                 int b = opcode & 0xf;
 649
 650                 tcg_gen_not_i32(REG(a), REG(b));
 651             }
 652             break;
 653         case 0x2d: /* ashr */
 654             {
 655                 int a = (opcode >> 4) & 0xf;
 656                 int b = opcode & 0xf;
 657
 658                 TCGv sv = tcg_temp_new_i32();
 659                 tcg_gen_andi_i32(sv, REG(b), 0x1f);
 660                 tcg_gen_sar_i32(REG(a), REG(a), sv);
 661                 tcg_temp_free_i32(sv);
 662             }
 663             break;
 664         case 0x2e: /* xor */
 665             {
 666                 int a = (opcode >> 4) & 0xf;
 667                 int b = opcode & 0xf;
 668
 669                 tcg_gen_xor_i32(REG(a), REG(a), REG(b));
 670             }
 671             break;
 672         case 0x2f: /* mul.l */
 673             {
 674                 int a = (opcode >> 4) & 0xf;
 675                 int b = opcode & 0xf;
 676
 677                 tcg_gen_mul_i32(REG(a), REG(a), REG(b));
 678             }
 679             break;
 680         case 0x30: /* swi */
 681             {
 682                 int val = cpu_ldl_code(env, ctx->pc+2);
 683
 684                 TCGv temp = tcg_temp_new_i32();
 685                 tcg_gen_movi_i32(temp, val);
 686                 tcg_gen_st_i32(temp, cpu_env,
 687                                offsetof(CPUMoxieState, sregs[3]));
 688                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 689                 tcg_gen_movi_i32(temp, MOXIE_EX_SWI);
 690                 gen_helper_raise_exception(cpu_env, temp);
 691                 tcg_temp_free_i32(temp);
 692
 693                 length = 6;
 694             }
 695             break;
 696         case 0x31: /* div.l */
 697             {
 698                 int a = (opcode >> 4) & 0xf;
 699                 int b = opcode & 0xf;
 700                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 701                 gen_helper_div(REG(a), cpu_env, REG(a), REG(b));
 702             }
 703             break;
 704         case 0x32: /* udiv.l */
 705             {
 706                 int a = (opcode >> 4) & 0xf;
 707                 int b = opcode & 0xf;
 708                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 709                 gen_helper_udiv(REG(a), cpu_env, REG(a), REG(b));
 710             }
 711             break;
 712         case 0x33: /* mod.l */
 713             {
 714                 int a = (opcode >> 4) & 0xf;
 715                 int b = opcode & 0xf;
 716                 tcg_gen_rem_i32(REG(a), REG(a), REG(b));
 717             }
 718             break;
 719         case 0x34: /* umod.l */
 720             {
 721                 int a = (opcode >> 4) & 0xf;
 722                 int b = opcode & 0xf;
 723                 tcg_gen_remu_i32(REG(a), REG(a), REG(b));
 724             }
 725             break;
 726         case 0x35: /* brk */
 727             {
 728                 TCGv temp = tcg_temp_new_i32();
 729                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 730                 tcg_gen_movi_i32(temp, MOXIE_EX_BREAK);
 731                 gen_helper_raise_exception(cpu_env, temp);
 732                 tcg_temp_free_i32(temp);
 733             }
 734             break;
 735         case 0x36: /* ldo.b */
 736             {
 737                 int a = (opcode >> 4) & 0xf;
 738                 int b = opcode & 0xf;
 739
 740                 TCGv t1 = tcg_temp_new_i32();
 741                 TCGv t2 = tcg_temp_new_i32();
 742                 tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
 743                 tcg_gen_qemu_ld8u(t2, t1, ctx->memidx);
 744                 tcg_gen_mov_i32(REG(a), t2);
 745
 746                 tcg_temp_free_i32(t1);
 747                 tcg_temp_free_i32(t2);
 748
 749                 length = 6;
 750             }
 751             break;
 752         case 0x37: /* sto.b */
 753             {
 754                 int a = (opcode >> 4) & 0xf;
 755                 int b = opcode & 0xf;
 756
 757                 TCGv t1 = tcg_temp_new_i32();
 758                 TCGv t2 = tcg_temp_new_i32();
 759                 tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
 760                 tcg_gen_qemu_st8(REG(b), t1, ctx->memidx);
 761
 762                 tcg_temp_free_i32(t1);
 763                 tcg_temp_free_i32(t2);
 764
 765                 length = 6;
 766             }
 767             break;
 768         case 0x38: /* ldo.s */
 769             {
 770                 int a = (opcode >> 4) & 0xf;
 771                 int b = opcode & 0xf;
 772
 773                 TCGv t1 = tcg_temp_new_i32();
 774                 TCGv t2 = tcg_temp_new_i32();
 775                 tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
 776                 tcg_gen_qemu_ld16u(t2, t1, ctx->memidx);
 777                 tcg_gen_mov_i32(REG(a), t2);
 778
 779                 tcg_temp_free_i32(t1);
 780                 tcg_temp_free_i32(t2);
 781
 782                 length = 6;
 783             }
 784             break;
 785         case 0x39: /* sto.s */
 786             {
 787                 int a = (opcode >> 4) & 0xf;
 788                 int b = opcode & 0xf;
 789
 790                 TCGv t1 = tcg_temp_new_i32();
 791                 TCGv t2 = tcg_temp_new_i32();
 792                 tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
 793                 tcg_gen_qemu_st16(REG(b), t1, ctx->memidx);
 794                 tcg_temp_free_i32(t1);
 795                 tcg_temp_free_i32(t2);
 796
 797                 length = 6;
 798             }
 799             break;
 800         default:
 801             {
 802                 TCGv temp = tcg_temp_new_i32();
 803                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 804                 tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
 805                 gen_helper_raise_exception(cpu_env, temp);
 806                 tcg_temp_free_i32(temp);
 807              }
 808             break;
 809         }
 810     }
 811
 812     return length;
 813 }
 814
 815 /* generate intermediate code for basic block 'tb'.  */
 816 void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
 817 {
 818     CPUMoxieState *env = cs->env_ptr;
 819     MoxieCPU *cpu = moxie_env_get_cpu(env);
 820     DisasContext ctx;
 821     target_ulong pc_start;
 822     int num_insns, max_insns;
 823
 824     pc_start = tb->pc;
 825     ctx.pc = pc_start;
 826     ctx.saved_pc = -1;
 827     ctx.tb = tb;
 828     ctx.memidx = 0;
 829     ctx.singlestep_enabled = 0;
 830     ctx.bstate = BS_NONE;
 831     num_insns = 0;
 832     max_insns = tb_cflags(tb) & CF_COUNT_MASK;
 833     if (max_insns == 0) {
 834         max_insns = CF_COUNT_MASK;
 835     }
 836     if (max_insns > TCG_MAX_INSNS) {
 837         max_insns = TCG_MAX_INSNS;
 838     }
 839
 840     gen_tb_start(tb);
 841     do {
 842         tcg_gen_insn_start(ctx.pc);
 843         num_insns++;
 844
 845         if (unlikely(cpu_breakpoint_test(cs, ctx.pc, BP_ANY))) {
 846             tcg_gen_movi_i32(cpu_pc, ctx.pc);
 847             gen_helper_debug(cpu_env);
 848             ctx.bstate = BS_EXCP;
 849             /* The address covered by the breakpoint must be included in
 850                [tb->pc, tb->pc + tb->size) in order to for it to be
 851                properly cleared -- thus we increment the PC here so that
 852                the logic setting tb->size below does the right thing.  */
 853             ctx.pc += 2;
 854             goto done_generating;
 855         }
 856
 857         ctx.opcode = cpu_lduw_code(env, ctx.pc);
 858         ctx.pc += decode_opc(cpu, &ctx);
 859
 860         if (num_insns >= max_insns) {
 861             break;
 862         }
 863         if (cs->singlestep_enabled) {
 864             break;
 865         }
 866         if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) {
 867             break;
 868         }
 869     } while (ctx.bstate == BS_NONE && !tcg_op_buf_full());
 870
 871     if (cs->singlestep_enabled) {
 872         tcg_gen_movi_tl(cpu_pc, ctx.pc);
 873         gen_helper_debug(cpu_env);
 874     } else {
 875         switch (ctx.bstate) {
 876         case BS_STOP:
 877         case BS_NONE:
 878             gen_goto_tb(env, &ctx, 0, ctx.pc);
 879             break;
 880         case BS_EXCP:
 881             tcg_gen_exit_tb(NULL, 0);
 882             break;
 883         case BS_BRANCH:
 884         default:
 885             break;
 886         }
 887     }
 888  done_generating:
 889     gen_tb_end(tb, num_insns);
 890
 891     tb->size = ctx.pc - pc_start;
 892     tb->icount = num_insns;
 893 }
 894
 895 void restore_state_to_opc(CPUMoxieState *env, TranslationBlock *tb,
 896                           target_ulong *data)
 897 {
 898     env->pc = data[0];
 899 }