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 <stdarg.h>
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <inttypes.h>
  29 #include <assert.h>
  30
  31 #include "cpu.h"
  32 #include "exec/exec-all.h"
  33 #include "disas/disas.h"
  34 #include "tcg-op.h"
  35 #include "exec/cpu_ldst.h"
  36
  37 #include "exec/helper-proto.h"
  38 #include "exec/helper-gen.h"
  39
  40 /* This is the state at translation time.  */
  41 typedef struct DisasContext {
  42     struct TranslationBlock *tb;
  43     target_ulong pc, saved_pc;
  44     uint32_t opcode;
  45     uint32_t fp_status;
  46     /* Routine used to access memory */
  47     int memidx;
  48     int bstate;
  49     target_ulong btarget;
  50     int singlestep_enabled;
  51 } DisasContext;
  52
  53 enum {
  54     BS_NONE     = 0, /* We go out of the TB without reaching a branch or an
  55                       * exception condition */
  56     BS_STOP     = 1, /* We want to stop translation for any reason */
  57     BS_BRANCH   = 2, /* We reached a branch condition     */
  58     BS_EXCP     = 3, /* We reached an exception condition */
  59 };
  60
  61 static TCGv cpu_pc;
  62 static TCGv cpu_gregs[16];
  63 static TCGv_ptr cpu_env;
  64 static TCGv cc_a, cc_b;
  65
  66 #include "exec/gen-icount.h"
  67
  68 #define REG(x) (cpu_gregs[x])
  69
  70 /* Extract the signed 10-bit offset from a 16-bit branch
  71    instruction.  */
  72 static int extract_branch_offset(int opcode)
  73 {
  74   return (((signed short)((opcode & ((1 << 10) - 1)) << 6)) >> 6) << 1;
  75 }
  76
  77 void moxie_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
  78                           int flags)
  79 {
  80     MoxieCPU *cpu = MOXIE_CPU(cs);
  81     CPUMoxieState *env = &cpu->env;
  82     int i;
  83     cpu_fprintf(f, "pc=0x%08x\n", env->pc);
  84     cpu_fprintf(f, "$fp=0x%08x $sp=0x%08x $r0=0x%08x $r1=0x%08x\n",
  85                 env->gregs[0], env->gregs[1], env->gregs[2], env->gregs[3]);
  86     for (i = 4; i < 16; i += 4) {
  87         cpu_fprintf(f, "$r%d=0x%08x $r%d=0x%08x $r%d=0x%08x $r%d=0x%08x\n",
  88                     i-2, env->gregs[i], i-1, env->gregs[i + 1],
  89                     i, env->gregs[i + 2], i+1, env->gregs[i + 3]);
  90     }
  91     for (i = 4; i < 16; i += 4) {
  92         cpu_fprintf(f, "sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x\n",
  93                     i-2, env->sregs[i], i-1, env->sregs[i + 1],
  94                     i, env->sregs[i + 2], i+1, env->sregs[i + 3]);
  95     }
  96 }
  97
  98 void moxie_translate_init(void)
  99 {
 100     int i;
 101     static int done_init;
 102     static const char * const gregnames[16] = {
 103         "$fp", "$sp", "$r0", "$r1",
 104         "$r2", "$r3", "$r4", "$r5",
 105         "$r6", "$r7", "$r8", "$r9",
 106         "$r10", "$r11", "$r12", "$r13"
 107     };
 108
 109     if (done_init) {
 110         return;
 111     }
 112     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
 113     cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
 114                                     offsetof(CPUMoxieState, pc), "$pc");
 115     for (i = 0; i < 16; i++)
 116         cpu_gregs[i] = tcg_global_mem_new_i32(TCG_AREG0,
 117                                               offsetof(CPUMoxieState, gregs[i]),
 118                                               gregnames[i]);
 119
 120     cc_a = tcg_global_mem_new_i32(TCG_AREG0,
 121                                   offsetof(CPUMoxieState, cc_a), "cc_a");
 122     cc_b = tcg_global_mem_new_i32(TCG_AREG0,
 123                                   offsetof(CPUMoxieState, cc_b), "cc_b");
 124
 125     done_init = 1;
 126 }
 127
 128 static inline void gen_goto_tb(CPUMoxieState *env, DisasContext *ctx,
 129                                int n, target_ulong dest)
 130 {
 131     TranslationBlock *tb;
 132     tb = ctx->tb;
 133
 134     if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
 135         !ctx->singlestep_enabled) {
 136         tcg_gen_goto_tb(n);
 137         tcg_gen_movi_i32(cpu_pc, dest);
 138         tcg_gen_exit_tb((uintptr_t)tb + n);
 139     } else {
 140         tcg_gen_movi_i32(cpu_pc, dest);
 141         if (ctx->singlestep_enabled) {
 142             gen_helper_debug(cpu_env);
 143         }
 144         tcg_gen_exit_tb(0);
 145     }
 146 }
 147
 148 static int decode_opc(MoxieCPU *cpu, DisasContext *ctx)
 149 {
 150     CPUMoxieState *env = &cpu->env;
 151
 152     /* Local cache for the instruction opcode.  */
 153     int opcode;
 154     /* Set the default instruction length.  */
 155     int length = 2;
 156
 157     if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
 158         tcg_gen_debug_insn_start(ctx->pc);
 159     }
 160
 161     /* Examine the 16-bit opcode.  */
 162     opcode = ctx->opcode;
 163
 164     /* Decode instruction.  */
 165     if (opcode & (1 << 15)) {
 166         if (opcode & (1 << 14)) {
 167             /* This is a Form 3 instruction.  */
 168             int inst = (opcode >> 10 & 0xf);
 169
 170 #define BRANCH(cond)                                                         \
 171     do {                                                                     \
 172         TCGLabel *l1 = gen_new_label();                                      \
 173         tcg_gen_brcond_i32(cond, cc_a, cc_b, l1);                            \
 174         gen_goto_tb(env, ctx, 1, ctx->pc+2);                                 \
 175         gen_set_label(l1);                                                   \
 176         gen_goto_tb(env, ctx, 0, extract_branch_offset(opcode) + ctx->pc+2); \
 177         ctx->bstate = BS_BRANCH;                                             \
 178     } while (0)
 179
 180             switch (inst) {
 181             case 0x00: /* beq */
 182                 BRANCH(TCG_COND_EQ);
 183                 break;
 184             case 0x01: /* bne */
 185                 BRANCH(TCG_COND_NE);
 186                 break;
 187             case 0x02: /* blt */
 188                 BRANCH(TCG_COND_LT);
 189                 break;
 190             case 0x03: /* bgt */
 191                 BRANCH(TCG_COND_GT);
 192                 break;
 193             case 0x04: /* bltu */
 194                 BRANCH(TCG_COND_LTU);
 195                 break;
 196             case 0x05: /* bgtu */
 197                 BRANCH(TCG_COND_GTU);
 198                 break;
 199             case 0x06: /* bge */
 200                 BRANCH(TCG_COND_GE);
 201                 break;
 202             case 0x07: /* ble */
 203                 BRANCH(TCG_COND_LE);
 204                 break;
 205             case 0x08: /* bgeu */
 206                 BRANCH(TCG_COND_GEU);
 207                 break;
 208             case 0x09: /* bleu */
 209                 BRANCH(TCG_COND_LEU);
 210                 break;
 211             default:
 212                 {
 213                     TCGv temp = tcg_temp_new_i32();
 214                     tcg_gen_movi_i32(cpu_pc, ctx->pc);
 215                     tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
 216                     gen_helper_raise_exception(cpu_env, temp);
 217                     tcg_temp_free_i32(temp);
 218                 }
 219                 break;
 220             }
 221         } else {
 222             /* This is a Form 2 instruction.  */
 223             int inst = (opcode >> 12 & 0x3);
 224             switch (inst) {
 225             case 0x00: /* inc */
 226                 {
 227                     int a = (opcode >> 8) & 0xf;
 228                     unsigned int v = (opcode & 0xff);
 229                     tcg_gen_addi_i32(REG(a), REG(a), v);
 230                 }
 231                 break;
 232             case 0x01: /* dec */
 233                 {
 234                     int a = (opcode >> 8) & 0xf;
 235                     unsigned int v = (opcode & 0xff);
 236                     tcg_gen_subi_i32(REG(a), REG(a), v);
 237                 }
 238                 break;
 239             case 0x02: /* gsr */
 240                 {
 241                     int a = (opcode >> 8) & 0xf;
 242                     unsigned v = (opcode & 0xff);
 243                     tcg_gen_ld_i32(REG(a), cpu_env,
 244                                    offsetof(CPUMoxieState, sregs[v]));
 245                 }
 246                 break;
 247             case 0x03: /* ssr */
 248                 {
 249                     int a = (opcode >> 8) & 0xf;
 250                     unsigned v = (opcode & 0xff);
 251                     tcg_gen_st_i32(REG(a), cpu_env,
 252                                    offsetof(CPUMoxieState, sregs[v]));
 253                 }
 254                 break;
 255             default:
 256                 {
 257                     TCGv temp = tcg_temp_new_i32();
 258                     tcg_gen_movi_i32(cpu_pc, ctx->pc);
 259                     tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
 260                     gen_helper_raise_exception(cpu_env, temp);
 261                     tcg_temp_free_i32(temp);
 262                 }
 263                 break;
 264             }
 265         }
 266     } else {
 267         /* This is a Form 1 instruction.  */
 268         int inst = opcode >> 8;
 269         switch (inst) {
 270         case 0x00: /* nop */
 271             break;
 272         case 0x01: /* ldi.l (immediate) */
 273             {
 274                 int reg = (opcode >> 4) & 0xf;
 275                 int val = cpu_ldl_code(env, ctx->pc+2);
 276                 tcg_gen_movi_i32(REG(reg), val);
 277                 length = 6;
 278             }
 279             break;
 280         case 0x02: /* mov (register-to-register) */
 281             {
 282                 int dest  = (opcode >> 4) & 0xf;
 283                 int src = opcode & 0xf;
 284                 tcg_gen_mov_i32(REG(dest), REG(src));
 285             }
 286             break;
 287         case 0x03: /* jsra */
 288             {
 289                 TCGv t1 = tcg_temp_new_i32();
 290                 TCGv t2 = tcg_temp_new_i32();
 291
 292                 tcg_gen_movi_i32(t1, ctx->pc + 6);
 293
 294                 /* Make space for the static chain and return address.  */
 295                 tcg_gen_subi_i32(t2, REG(1), 8);
 296                 tcg_gen_mov_i32(REG(1), t2);
 297                 tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
 298
 299                 /* Push the current frame pointer.  */
 300                 tcg_gen_subi_i32(t2, REG(1), 4);
 301                 tcg_gen_mov_i32(REG(1), t2);
 302                 tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
 303
 304                 /* Set the pc and $fp.  */
 305                 tcg_gen_mov_i32(REG(0), REG(1));
 306
 307                 gen_goto_tb(env, ctx, 0, cpu_ldl_code(env, ctx->pc+2));
 308
 309                 tcg_temp_free_i32(t1);
 310                 tcg_temp_free_i32(t2);
 311
 312                 ctx->bstate = BS_BRANCH;
 313                 length = 6;
 314             }
 315             break;
 316         case 0x04: /* ret */
 317             {
 318                 TCGv t1 = tcg_temp_new_i32();
 319
 320                 /* The new $sp is the old $fp.  */
 321                 tcg_gen_mov_i32(REG(1), REG(0));
 322
 323                 /* Pop the frame pointer.  */
 324                 tcg_gen_qemu_ld32u(REG(0), REG(1), ctx->memidx);
 325                 tcg_gen_addi_i32(t1, REG(1), 4);
 326                 tcg_gen_mov_i32(REG(1), t1);
 327
 328
 329                 /* Pop the return address and skip over the static chain
 330                    slot.  */
 331                 tcg_gen_qemu_ld32u(cpu_pc, REG(1), ctx->memidx);
 332                 tcg_gen_addi_i32(t1, REG(1), 8);
 333                 tcg_gen_mov_i32(REG(1), t1);
 334
 335                 tcg_temp_free_i32(t1);
 336
 337                 /* Jump... */
 338                 tcg_gen_exit_tb(0);
 339
 340                 ctx->bstate = BS_BRANCH;
 341             }
 342             break;
 343         case 0x05: /* add.l */
 344             {
 345                 int a = (opcode >> 4) & 0xf;
 346                 int b = opcode & 0xf;
 347
 348                 tcg_gen_add_i32(REG(a), REG(a), REG(b));
 349             }
 350             break;
 351         case 0x06: /* push */
 352             {
 353                 int a = (opcode >> 4) & 0xf;
 354                 int b = opcode & 0xf;
 355
 356                 TCGv t1 = tcg_temp_new_i32();
 357                 tcg_gen_subi_i32(t1, REG(a), 4);
 358                 tcg_gen_mov_i32(REG(a), t1);
 359                 tcg_gen_qemu_st32(REG(b), REG(a), ctx->memidx);
 360                 tcg_temp_free_i32(t1);
 361             }
 362             break;
 363         case 0x07: /* pop */
 364             {
 365                 int a = (opcode >> 4) & 0xf;
 366                 int b = opcode & 0xf;
 367                 TCGv t1 = tcg_temp_new_i32();
 368
 369                 tcg_gen_qemu_ld32u(REG(b), REG(a), ctx->memidx);
 370                 tcg_gen_addi_i32(t1, REG(a), 4);
 371                 tcg_gen_mov_i32(REG(a), t1);
 372                 tcg_temp_free_i32(t1);
 373             }
 374             break;
 375         case 0x08: /* lda.l */
 376             {
 377                 int reg = (opcode >> 4) & 0xf;
 378
 379                 TCGv ptr = tcg_temp_new_i32();
 380                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 381                 tcg_gen_qemu_ld32u(REG(reg), ptr, ctx->memidx);
 382                 tcg_temp_free_i32(ptr);
 383
 384                 length = 6;
 385             }
 386             break;
 387         case 0x09: /* sta.l */
 388             {
 389                 int val = (opcode >> 4) & 0xf;
 390
 391                 TCGv ptr = tcg_temp_new_i32();
 392                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 393                 tcg_gen_qemu_st32(REG(val), ptr, ctx->memidx);
 394                 tcg_temp_free_i32(ptr);
 395
 396                 length = 6;
 397             }
 398             break;
 399         case 0x0a: /* ld.l (register indirect) */
 400             {
 401                 int src  = opcode & 0xf;
 402                 int dest = (opcode >> 4) & 0xf;
 403
 404                 tcg_gen_qemu_ld32u(REG(dest), REG(src), ctx->memidx);
 405             }
 406             break;
 407         case 0x0b: /* st.l */
 408             {
 409                 int dest = (opcode >> 4) & 0xf;
 410                 int val  = opcode & 0xf;
 411
 412                 tcg_gen_qemu_st32(REG(val), REG(dest), ctx->memidx);
 413             }
 414             break;
 415         case 0x0c: /* ldo.l */
 416             {
 417                 int a = (opcode >> 4) & 0xf;
 418                 int b = opcode & 0xf;
 419
 420                 TCGv t1 = tcg_temp_new_i32();
 421                 TCGv t2 = tcg_temp_new_i32();
 422                 tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
 423                 tcg_gen_qemu_ld32u(t2, t1, ctx->memidx);
 424                 tcg_gen_mov_i32(REG(a), t2);
 425
 426                 tcg_temp_free_i32(t1);
 427                 tcg_temp_free_i32(t2);
 428
 429                 length = 6;
 430             }
 431             break;
 432         case 0x0d: /* sto.l */
 433             {
 434                 int a = (opcode >> 4) & 0xf;
 435                 int b = opcode & 0xf;
 436
 437                 TCGv t1 = tcg_temp_new_i32();
 438                 TCGv t2 = tcg_temp_new_i32();
 439                 tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
 440                 tcg_gen_qemu_st32(REG(b), t1, ctx->memidx);
 441
 442                 tcg_temp_free_i32(t1);
 443                 tcg_temp_free_i32(t2);
 444
 445                 length = 6;
 446             }
 447             break;
 448         case 0x0e: /* cmp */
 449             {
 450                 int a  = (opcode >> 4) & 0xf;
 451                 int b  = opcode & 0xf;
 452
 453                 tcg_gen_mov_i32(cc_a, REG(a));
 454                 tcg_gen_mov_i32(cc_b, REG(b));
 455             }
 456             break;
 457         case 0x19: /* jsr */
 458             {
 459                 int fnreg = (opcode >> 4) & 0xf;
 460
 461                 /* Load the stack pointer into T0.  */
 462                 TCGv t1 = tcg_temp_new_i32();
 463                 TCGv t2 = tcg_temp_new_i32();
 464
 465                 tcg_gen_movi_i32(t1, ctx->pc+2);
 466
 467                 /* Make space for the static chain and return address.  */
 468                 tcg_gen_subi_i32(t2, REG(1), 8);
 469                 tcg_gen_mov_i32(REG(1), t2);
 470                 tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
 471
 472                 /* Push the current frame pointer.  */
 473                 tcg_gen_subi_i32(t2, REG(1), 4);
 474                 tcg_gen_mov_i32(REG(1), t2);
 475                 tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
 476
 477                 /* Set the pc and $fp.  */
 478                 tcg_gen_mov_i32(REG(0), REG(1));
 479                 tcg_gen_mov_i32(cpu_pc, REG(fnreg));
 480                 tcg_temp_free_i32(t1);
 481                 tcg_temp_free_i32(t2);
 482                 tcg_gen_exit_tb(0);
 483                 ctx->bstate = BS_BRANCH;
 484             }
 485             break;
 486         case 0x1a: /* jmpa */
 487             {
 488                 tcg_gen_movi_i32(cpu_pc, cpu_ldl_code(env, ctx->pc+2));
 489                 tcg_gen_exit_tb(0);
 490                 ctx->bstate = BS_BRANCH;
 491                 length = 6;
 492             }
 493             break;
 494         case 0x1b: /* ldi.b (immediate) */
 495             {
 496                 int reg = (opcode >> 4) & 0xf;
 497                 int val = cpu_ldl_code(env, ctx->pc+2);
 498                 tcg_gen_movi_i32(REG(reg), val);
 499                 length = 6;
 500             }
 501             break;
 502         case 0x1c: /* ld.b (register indirect) */
 503             {
 504                 int src  = opcode & 0xf;
 505                 int dest = (opcode >> 4) & 0xf;
 506
 507                 tcg_gen_qemu_ld8u(REG(dest), REG(src), ctx->memidx);
 508             }
 509             break;
 510         case 0x1d: /* lda.b */
 511             {
 512                 int reg = (opcode >> 4) & 0xf;
 513
 514                 TCGv ptr = tcg_temp_new_i32();
 515                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 516                 tcg_gen_qemu_ld8u(REG(reg), ptr, ctx->memidx);
 517                 tcg_temp_free_i32(ptr);
 518
 519                 length = 6;
 520             }
 521             break;
 522         case 0x1e: /* st.b */
 523             {
 524                 int dest = (opcode >> 4) & 0xf;
 525                 int val  = opcode & 0xf;
 526
 527                 tcg_gen_qemu_st8(REG(val), REG(dest), ctx->memidx);
 528             }
 529             break;
 530         case 0x1f: /* sta.b */
 531             {
 532                 int val = (opcode >> 4) & 0xf;
 533
 534                 TCGv ptr = tcg_temp_new_i32();
 535                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 536                 tcg_gen_qemu_st8(REG(val), ptr, ctx->memidx);
 537                 tcg_temp_free_i32(ptr);
 538
 539                 length = 6;
 540             }
 541             break;
 542         case 0x20: /* ldi.s (immediate) */
 543             {
 544                 int reg = (opcode >> 4) & 0xf;
 545                 int val = cpu_ldl_code(env, ctx->pc+2);
 546                 tcg_gen_movi_i32(REG(reg), val);
 547                 length = 6;
 548             }
 549             break;
 550         case 0x21: /* ld.s (register indirect) */
 551             {
 552                 int src  = opcode & 0xf;
 553                 int dest = (opcode >> 4) & 0xf;
 554
 555                 tcg_gen_qemu_ld16u(REG(dest), REG(src), ctx->memidx);
 556             }
 557             break;
 558         case 0x22: /* lda.s */
 559             {
 560                 int reg = (opcode >> 4) & 0xf;
 561
 562                 TCGv ptr = tcg_temp_new_i32();
 563                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 564                 tcg_gen_qemu_ld16u(REG(reg), ptr, ctx->memidx);
 565                 tcg_temp_free_i32(ptr);
 566
 567                 length = 6;
 568             }
 569             break;
 570         case 0x23: /* st.s */
 571             {
 572                 int dest = (opcode >> 4) & 0xf;
 573                 int val  = opcode & 0xf;
 574
 575                 tcg_gen_qemu_st16(REG(val), REG(dest), ctx->memidx);
 576             }
 577             break;
 578         case 0x24: /* sta.s */
 579             {
 580                 int val = (opcode >> 4) & 0xf;
 581
 582                 TCGv ptr = tcg_temp_new_i32();
 583                 tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
 584                 tcg_gen_qemu_st16(REG(val), ptr, ctx->memidx);
 585                 tcg_temp_free_i32(ptr);
 586
 587                 length = 6;
 588             }
 589             break;
 590         case 0x25: /* jmp */
 591             {
 592                 int reg = (opcode >> 4) & 0xf;
 593                 tcg_gen_mov_i32(cpu_pc, REG(reg));
 594                 tcg_gen_exit_tb(0);
 595                 ctx->bstate = BS_BRANCH;
 596             }
 597             break;
 598         case 0x26: /* and */
 599             {
 600                 int a = (opcode >> 4) & 0xf;
 601                 int b = opcode & 0xf;
 602
 603                 tcg_gen_and_i32(REG(a), REG(a), REG(b));
 604             }
 605             break;
 606         case 0x27: /* lshr */
 607             {
 608                 int a = (opcode >> 4) & 0xf;
 609                 int b = opcode & 0xf;
 610
 611                 TCGv sv = tcg_temp_new_i32();
 612                 tcg_gen_andi_i32(sv, REG(b), 0x1f);
 613                 tcg_gen_shr_i32(REG(a), REG(a), sv);
 614                 tcg_temp_free_i32(sv);
 615             }
 616             break;
 617         case 0x28: /* ashl */
 618             {
 619                 int a = (opcode >> 4) & 0xf;
 620                 int b = opcode & 0xf;
 621
 622                 TCGv sv = tcg_temp_new_i32();
 623                 tcg_gen_andi_i32(sv, REG(b), 0x1f);
 624                 tcg_gen_shl_i32(REG(a), REG(a), sv);
 625                 tcg_temp_free_i32(sv);
 626             }
 627             break;
 628         case 0x29: /* sub.l */
 629             {
 630                 int a = (opcode >> 4) & 0xf;
 631                 int b = opcode & 0xf;
 632
 633                 tcg_gen_sub_i32(REG(a), REG(a), REG(b));
 634             }
 635             break;
 636         case 0x2a: /* neg */
 637             {
 638                 int a = (opcode >> 4) & 0xf;
 639                 int b = opcode & 0xf;
 640
 641                 tcg_gen_neg_i32(REG(a), REG(b));
 642             }
 643             break;
 644         case 0x2b: /* or */
 645             {
 646                 int a = (opcode >> 4) & 0xf;
 647                 int b = opcode & 0xf;
 648
 649                 tcg_gen_or_i32(REG(a), REG(a), REG(b));
 650             }
 651             break;
 652         case 0x2c: /* not */
 653             {
 654                 int a = (opcode >> 4) & 0xf;
 655                 int b = opcode & 0xf;
 656
 657                 tcg_gen_not_i32(REG(a), REG(b));
 658             }
 659             break;
 660         case 0x2d: /* ashr */
 661             {
 662                 int a = (opcode >> 4) & 0xf;
 663                 int b = opcode & 0xf;
 664
 665                 TCGv sv = tcg_temp_new_i32();
 666                 tcg_gen_andi_i32(sv, REG(b), 0x1f);
 667                 tcg_gen_sar_i32(REG(a), REG(a), sv);
 668                 tcg_temp_free_i32(sv);
 669             }
 670             break;
 671         case 0x2e: /* xor */
 672             {
 673                 int a = (opcode >> 4) & 0xf;
 674                 int b = opcode & 0xf;
 675
 676                 tcg_gen_xor_i32(REG(a), REG(a), REG(b));
 677             }
 678             break;
 679         case 0x2f: /* mul.l */
 680             {
 681                 int a = (opcode >> 4) & 0xf;
 682                 int b = opcode & 0xf;
 683
 684                 tcg_gen_mul_i32(REG(a), REG(a), REG(b));
 685             }
 686             break;
 687         case 0x30: /* swi */
 688             {
 689                 int val = cpu_ldl_code(env, ctx->pc+2);
 690
 691                 TCGv temp = tcg_temp_new_i32();
 692                 tcg_gen_movi_i32(temp, val);
 693                 tcg_gen_st_i32(temp, cpu_env,
 694                                offsetof(CPUMoxieState, sregs[3]));
 695                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 696                 tcg_gen_movi_i32(temp, MOXIE_EX_SWI);
 697                 gen_helper_raise_exception(cpu_env, temp);
 698                 tcg_temp_free_i32(temp);
 699
 700                 length = 6;
 701             }
 702             break;
 703         case 0x31: /* div.l */
 704             {
 705                 int a = (opcode >> 4) & 0xf;
 706                 int b = opcode & 0xf;
 707                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 708                 gen_helper_div(REG(a), cpu_env, REG(a), REG(b));
 709             }
 710             break;
 711         case 0x32: /* udiv.l */
 712             {
 713                 int a = (opcode >> 4) & 0xf;
 714                 int b = opcode & 0xf;
 715                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 716                 gen_helper_udiv(REG(a), cpu_env, REG(a), REG(b));
 717             }
 718             break;
 719         case 0x33: /* mod.l */
 720             {
 721                 int a = (opcode >> 4) & 0xf;
 722                 int b = opcode & 0xf;
 723                 tcg_gen_rem_i32(REG(a), REG(a), REG(b));
 724             }
 725             break;
 726         case 0x34: /* umod.l */
 727             {
 728                 int a = (opcode >> 4) & 0xf;
 729                 int b = opcode & 0xf;
 730                 tcg_gen_remu_i32(REG(a), REG(a), REG(b));
 731             }
 732             break;
 733         case 0x35: /* brk */
 734             {
 735                 TCGv temp = tcg_temp_new_i32();
 736                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 737                 tcg_gen_movi_i32(temp, MOXIE_EX_BREAK);
 738                 gen_helper_raise_exception(cpu_env, temp);
 739                 tcg_temp_free_i32(temp);
 740             }
 741             break;
 742         case 0x36: /* ldo.b */
 743             {
 744                 int a = (opcode >> 4) & 0xf;
 745                 int b = opcode & 0xf;
 746
 747                 TCGv t1 = tcg_temp_new_i32();
 748                 TCGv t2 = tcg_temp_new_i32();
 749                 tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
 750                 tcg_gen_qemu_ld8u(t2, t1, ctx->memidx);
 751                 tcg_gen_mov_i32(REG(a), t2);
 752
 753                 tcg_temp_free_i32(t1);
 754                 tcg_temp_free_i32(t2);
 755
 756                 length = 6;
 757             }
 758             break;
 759         case 0x37: /* sto.b */
 760             {
 761                 int a = (opcode >> 4) & 0xf;
 762                 int b = opcode & 0xf;
 763
 764                 TCGv t1 = tcg_temp_new_i32();
 765                 TCGv t2 = tcg_temp_new_i32();
 766                 tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
 767                 tcg_gen_qemu_st8(REG(b), t1, ctx->memidx);
 768
 769                 tcg_temp_free_i32(t1);
 770                 tcg_temp_free_i32(t2);
 771
 772                 length = 6;
 773             }
 774             break;
 775         case 0x38: /* ldo.s */
 776             {
 777                 int a = (opcode >> 4) & 0xf;
 778                 int b = opcode & 0xf;
 779
 780                 TCGv t1 = tcg_temp_new_i32();
 781                 TCGv t2 = tcg_temp_new_i32();
 782                 tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
 783                 tcg_gen_qemu_ld16u(t2, t1, ctx->memidx);
 784                 tcg_gen_mov_i32(REG(a), t2);
 785
 786                 tcg_temp_free_i32(t1);
 787                 tcg_temp_free_i32(t2);
 788
 789                 length = 6;
 790             }
 791             break;
 792         case 0x39: /* sto.s */
 793             {
 794                 int a = (opcode >> 4) & 0xf;
 795                 int b = opcode & 0xf;
 796
 797                 TCGv t1 = tcg_temp_new_i32();
 798                 TCGv t2 = tcg_temp_new_i32();
 799                 tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
 800                 tcg_gen_qemu_st16(REG(b), t1, ctx->memidx);
 801                 tcg_temp_free_i32(t1);
 802                 tcg_temp_free_i32(t2);
 803
 804                 length = 6;
 805             }
 806             break;
 807         default:
 808             {
 809                 TCGv temp = tcg_temp_new_i32();
 810                 tcg_gen_movi_i32(cpu_pc, ctx->pc);
 811                 tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
 812                 gen_helper_raise_exception(cpu_env, temp);
 813                 tcg_temp_free_i32(temp);
 814              }
 815             break;
 816         }
 817     }
 818
 819     return length;
 820 }
 821
 822 /* generate intermediate code for basic block 'tb'.  */
 823 static inline void
 824 gen_intermediate_code_internal(MoxieCPU *cpu, TranslationBlock *tb,
 825                                bool search_pc)
 826 {
 827     CPUState *cs = CPU(cpu);
 828     DisasContext ctx;
 829     target_ulong pc_start;
 830     CPUBreakpoint *bp;
 831     int j, lj = -1;
 832     CPUMoxieState *env = &cpu->env;
 833     int num_insns;
 834
 835     pc_start = tb->pc;
 836     ctx.pc = pc_start;
 837     ctx.saved_pc = -1;
 838     ctx.tb = tb;
 839     ctx.memidx = 0;
 840     ctx.singlestep_enabled = 0;
 841     ctx.bstate = BS_NONE;
 842     num_insns = 0;
 843
 844     gen_tb_start(tb);
 845     do {
 846         if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
 847             QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
 848                 if (ctx.pc == bp->pc) {
 849                     tcg_gen_movi_i32(cpu_pc, ctx.pc);
 850                     gen_helper_debug(cpu_env);
 851                     ctx.bstate = BS_EXCP;
 852                     goto done_generating;
 853                 }
 854             }
 855         }
 856
 857         if (search_pc) {
 858             j = tcg_op_buf_count();
 859             if (lj < j) {
 860                 lj++;
 861                 while (lj < j) {
 862                     tcg_ctx.gen_opc_instr_start[lj++] = 0;
 863                 }
 864             }
 865             tcg_ctx.gen_opc_pc[lj] = ctx.pc;
 866             tcg_ctx.gen_opc_instr_start[lj] = 1;
 867             tcg_ctx.gen_opc_icount[lj] = num_insns;
 868         }
 869         ctx.opcode = cpu_lduw_code(env, ctx.pc);
 870         ctx.pc += decode_opc(cpu, &ctx);
 871         num_insns++;
 872
 873         if (cs->singlestep_enabled) {
 874             break;
 875         }
 876
 877         if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) {
 878             break;
 879         }
 880     } while (ctx.bstate == BS_NONE && !tcg_op_buf_full());
 881
 882     if (cs->singlestep_enabled) {
 883         tcg_gen_movi_tl(cpu_pc, ctx.pc);
 884         gen_helper_debug(cpu_env);
 885     } else {
 886         switch (ctx.bstate) {
 887         case BS_STOP:
 888         case BS_NONE:
 889             gen_goto_tb(env, &ctx, 0, ctx.pc);
 890             break;
 891         case BS_EXCP:
 892             tcg_gen_exit_tb(0);
 893             break;
 894         case BS_BRANCH:
 895         default:
 896             break;
 897         }
 898     }
 899  done_generating:
 900     gen_tb_end(tb, num_insns);
 901
 902     if (search_pc) {
 903         j = tcg_op_buf_count();
 904         lj++;
 905         while (lj <= j) {
 906             tcg_ctx.gen_opc_instr_start[lj++] = 0;
 907         }
 908     } else {
 909         tb->size = ctx.pc - pc_start;
 910         tb->icount = num_insns;
 911     }
 912 }
 913
 914 void gen_intermediate_code(CPUMoxieState *env, struct TranslationBlock *tb)
 915 {
 916     gen_intermediate_code_internal(moxie_env_get_cpu(env), tb, false);
 917 }
 918
 919 void gen_intermediate_code_pc(CPUMoxieState *env, struct TranslationBlock *tb)
 920 {
 921     gen_intermediate_code_internal(moxie_env_get_cpu(env), tb, true);
 922 }
 923
 924 void restore_state_to_opc(CPUMoxieState *env, TranslationBlock *tb, int pc_pos)
 925 {
 926     env->pc = tcg_ctx.gen_opc_pc[pc_pos];
 927 }