target-arm/translate.c

   1 /*
   2  *  ARM translation
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   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, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25
  26 #include "cpu.h"
  27 #include "exec-all.h"
  28 #include "disas.h"
  29
  30 /* internal defines */
  31 typedef struct DisasContext {
  32     uint8_t *pc;
  33     int is_jmp;
  34     struct TranslationBlock *tb;
  35 } DisasContext;
  36
  37 #define DISAS_JUMP_NEXT 4
  38
  39 /* XXX: move that elsewhere */
  40 static uint16_t *gen_opc_ptr;
  41 static uint32_t *gen_opparam_ptr;
  42 extern FILE *logfile;
  43 extern int loglevel;
  44
  45 enum {
  46 #define DEF(s, n, copy_size) INDEX_op_ ## s,
  47 #include "opc.h"
  48 #undef DEF
  49     NB_OPS,
  50 };
  51
  52 #include "gen-op.h"
  53
  54 static GenOpFunc2 *gen_test_cc[14] = {
  55     gen_op_test_eq,
  56     gen_op_test_ne,
  57     gen_op_test_cs,
  58     gen_op_test_cc,
  59     gen_op_test_mi,
  60     gen_op_test_pl,
  61     gen_op_test_vs,
  62     gen_op_test_vc,
  63     gen_op_test_hi,
  64     gen_op_test_ls,
  65     gen_op_test_ge,
  66     gen_op_test_lt,
  67     gen_op_test_gt,
  68     gen_op_test_le,
  69 };
  70
  71 const uint8_t table_logic_cc[16] = {
  72     1, /* and */
  73     1, /* xor */
  74     0, /* sub */
  75     0, /* rsb */
  76     0, /* add */
  77     0, /* adc */
  78     0, /* sbc */
  79     0, /* rsc */
  80     1, /* andl */
  81     1, /* xorl */
  82     0, /* cmp */
  83     0, /* cmn */
  84     1, /* orr */
  85     1, /* mov */
  86     1, /* bic */
  87     1, /* mvn */
  88 };
  89
  90 static GenOpFunc1 *gen_shift_T1_im[4] = {
  91     gen_op_shll_T1_im,
  92     gen_op_shrl_T1_im,
  93     gen_op_sarl_T1_im,
  94     gen_op_rorl_T1_im,
  95 };
  96
  97 static GenOpFunc1 *gen_shift_T2_im[4] = {
  98     gen_op_shll_T2_im,
  99     gen_op_shrl_T2_im,
 100     gen_op_sarl_T2_im,
 101     gen_op_rorl_T2_im,
 102 };
 103
 104 static GenOpFunc1 *gen_shift_T1_im_cc[4] = {
 105     gen_op_shll_T1_im_cc,
 106     gen_op_shrl_T1_im_cc,
 107     gen_op_sarl_T1_im_cc,
 108     gen_op_rorl_T1_im_cc,
 109 };
 110
 111 static GenOpFunc *gen_shift_T1_T0[4] = {
 112     gen_op_shll_T1_T0,
 113     gen_op_shrl_T1_T0,
 114     gen_op_sarl_T1_T0,
 115     gen_op_rorl_T1_T0,
 116 };
 117
 118 static GenOpFunc *gen_shift_T1_T0_cc[4] = {
 119     gen_op_shll_T1_T0_cc,
 120     gen_op_shrl_T1_T0_cc,
 121     gen_op_sarl_T1_T0_cc,
 122     gen_op_rorl_T1_T0_cc,
 123 };
 124
 125 static GenOpFunc *gen_op_movl_TN_reg[3][16] = {
 126     {
 127         gen_op_movl_T0_r0,
 128         gen_op_movl_T0_r1,
 129         gen_op_movl_T0_r2,
 130         gen_op_movl_T0_r3,
 131         gen_op_movl_T0_r4,
 132         gen_op_movl_T0_r5,
 133         gen_op_movl_T0_r6,
 134         gen_op_movl_T0_r7,
 135         gen_op_movl_T0_r8,
 136         gen_op_movl_T0_r9,
 137         gen_op_movl_T0_r10,
 138         gen_op_movl_T0_r11,
 139         gen_op_movl_T0_r12,
 140         gen_op_movl_T0_r13,
 141         gen_op_movl_T0_r14,
 142         gen_op_movl_T0_r15,
 143     },
 144     {
 145         gen_op_movl_T1_r0,
 146         gen_op_movl_T1_r1,
 147         gen_op_movl_T1_r2,
 148         gen_op_movl_T1_r3,
 149         gen_op_movl_T1_r4,
 150         gen_op_movl_T1_r5,
 151         gen_op_movl_T1_r6,
 152         gen_op_movl_T1_r7,
 153         gen_op_movl_T1_r8,
 154         gen_op_movl_T1_r9,
 155         gen_op_movl_T1_r10,
 156         gen_op_movl_T1_r11,
 157         gen_op_movl_T1_r12,
 158         gen_op_movl_T1_r13,
 159         gen_op_movl_T1_r14,
 160         gen_op_movl_T1_r15,
 161     },
 162     {
 163         gen_op_movl_T2_r0,
 164         gen_op_movl_T2_r1,
 165         gen_op_movl_T2_r2,
 166         gen_op_movl_T2_r3,
 167         gen_op_movl_T2_r4,
 168         gen_op_movl_T2_r5,
 169         gen_op_movl_T2_r6,
 170         gen_op_movl_T2_r7,
 171         gen_op_movl_T2_r8,
 172         gen_op_movl_T2_r9,
 173         gen_op_movl_T2_r10,
 174         gen_op_movl_T2_r11,
 175         gen_op_movl_T2_r12,
 176         gen_op_movl_T2_r13,
 177         gen_op_movl_T2_r14,
 178         gen_op_movl_T2_r15,
 179     },
 180 };
 181
 182 static GenOpFunc *gen_op_movl_reg_TN[2][16] = {
 183     {
 184         gen_op_movl_r0_T0,
 185         gen_op_movl_r1_T0,
 186         gen_op_movl_r2_T0,
 187         gen_op_movl_r3_T0,
 188         gen_op_movl_r4_T0,
 189         gen_op_movl_r5_T0,
 190         gen_op_movl_r6_T0,
 191         gen_op_movl_r7_T0,
 192         gen_op_movl_r8_T0,
 193         gen_op_movl_r9_T0,
 194         gen_op_movl_r10_T0,
 195         gen_op_movl_r11_T0,
 196         gen_op_movl_r12_T0,
 197         gen_op_movl_r13_T0,
 198         gen_op_movl_r14_T0,
 199         gen_op_movl_r15_T0,
 200     },
 201     {
 202         gen_op_movl_r0_T1,
 203         gen_op_movl_r1_T1,
 204         gen_op_movl_r2_T1,
 205         gen_op_movl_r3_T1,
 206         gen_op_movl_r4_T1,
 207         gen_op_movl_r5_T1,
 208         gen_op_movl_r6_T1,
 209         gen_op_movl_r7_T1,
 210         gen_op_movl_r8_T1,
 211         gen_op_movl_r9_T1,
 212         gen_op_movl_r10_T1,
 213         gen_op_movl_r11_T1,
 214         gen_op_movl_r12_T1,
 215         gen_op_movl_r13_T1,
 216         gen_op_movl_r14_T1,
 217         gen_op_movl_r15_T1,
 218     },
 219 };
 220
 221 static GenOpFunc1 *gen_op_movl_TN_im[3] = {
 222     gen_op_movl_T0_im,
 223     gen_op_movl_T1_im,
 224     gen_op_movl_T2_im,
 225 };
 226
 227 static inline void gen_movl_TN_reg(DisasContext *s, int reg, int t)
 228 {
 229     int val;
 230
 231     if (reg == 15) {
 232         /* normaly, since we updated PC, we need only to add 4 */
 233         val = (long)s->pc + 4;
 234         gen_op_movl_TN_im[t](val);
 235     } else {
 236         gen_op_movl_TN_reg[t][reg]();
 237     }
 238 }
 239
 240 static inline void gen_movl_T0_reg(DisasContext *s, int reg)
 241 {
 242     gen_movl_TN_reg(s, reg, 0);
 243 }
 244
 245 static inline void gen_movl_T1_reg(DisasContext *s, int reg)
 246 {
 247     gen_movl_TN_reg(s, reg, 1);
 248 }
 249
 250 static inline void gen_movl_T2_reg(DisasContext *s, int reg)
 251 {
 252     gen_movl_TN_reg(s, reg, 2);
 253 }
 254
 255 static inline void gen_movl_reg_TN(DisasContext *s, int reg, int t)
 256 {
 257     gen_op_movl_reg_TN[t][reg]();
 258     if (reg == 15) {
 259         s->is_jmp = DISAS_JUMP;
 260     }
 261 }
 262
 263 static inline void gen_movl_reg_T0(DisasContext *s, int reg)
 264 {
 265     gen_movl_reg_TN(s, reg, 0);
 266 }
 267
 268 static inline void gen_movl_reg_T1(DisasContext *s, int reg)
 269 {
 270     gen_movl_reg_TN(s, reg, 1);
 271 }
 272
 273 static inline void gen_add_data_offset(DisasContext *s, unsigned int insn)
 274 {
 275     int val, rm, shift;
 276
 277     if (!(insn & (1 << 25))) {
 278         /* immediate */
 279         val = insn & 0xfff;
 280         if (!(insn & (1 << 23)))
 281             val = -val;
 282         if (val != 0)
 283             gen_op_addl_T1_im(val);
 284     } else {
 285         /* shift/register */
 286         rm = (insn) & 0xf;
 287         shift = (insn >> 7) & 0x1f;
 288         gen_movl_T2_reg(s, rm);
 289         if (shift != 0) {
 290             gen_shift_T2_im[(insn >> 5) & 3](shift);
 291         }
 292         if (!(insn & (1 << 23)))
 293             gen_op_subl_T1_T2();
 294         else
 295             gen_op_addl_T1_T2();
 296     }
 297 }
 298
 299 static inline void gen_add_datah_offset(DisasContext *s, unsigned int insn)
 300 {
 301     int val, rm;
 302
 303     if (insn & (1 << 22)) {
 304         /* immediate */
 305         val = (insn & 0xf) | ((insn >> 4) & 0xf0);
 306         if (!(insn & (1 << 23)))
 307             val = -val;
 308         if (val != 0)
 309             gen_op_addl_T1_im(val);
 310     } else {
 311         /* register */
 312         rm = (insn) & 0xf;
 313         gen_movl_T2_reg(s, rm);
 314         if (!(insn & (1 << 23)))
 315             gen_op_subl_T1_T2();
 316         else
 317             gen_op_addl_T1_T2();
 318     }
 319 }
 320
 321 static void disas_arm_insn(DisasContext *s)
 322 {
 323     unsigned int cond, insn, val, op1, i, shift, rm, rs, rn, rd, sh;
 324
 325     insn = ldl(s->pc);
 326     s->pc += 4;
 327
 328     cond = insn >> 28;
 329     if (cond == 0xf)
 330         goto illegal_op;
 331     if (cond != 0xe) {
 332         /* if not always execute, we generate a conditional jump to
 333            next instruction */
 334         gen_test_cc[cond ^ 1]((long)s->tb, (long)s->pc);
 335         s->is_jmp = DISAS_JUMP_NEXT;
 336     }
 337     if (((insn & 0x0e000000) == 0 &&
 338          (insn & 0x00000090) != 0x90) ||
 339         ((insn & 0x0e000000) == (1 << 25))) {
 340         int set_cc, logic_cc, shiftop;
 341
 342         op1 = (insn >> 21) & 0xf;
 343         set_cc = (insn >> 20) & 1;
 344         logic_cc = table_logic_cc[op1] & set_cc;
 345
 346         /* data processing instruction */
 347         if (insn & (1 << 25)) {
 348             /* immediate operand */
 349             val = insn & 0xff;
 350             shift = ((insn >> 8) & 0xf) * 2;
 351             if (shift)
 352                 val = (val >> shift) | (val << (32 - shift));
 353             gen_op_movl_T1_im(val);
 354             /* XXX: is CF modified ? */
 355         } else {
 356             /* register */
 357             rm = (insn) & 0xf;
 358             gen_movl_T1_reg(s, rm);
 359             shiftop = (insn >> 5) & 3;
 360             if (!(insn & (1 << 4))) {
 361                 shift = (insn >> 7) & 0x1f;
 362                 if (shift != 0) {
 363                     if (logic_cc) {
 364                         gen_shift_T1_im_cc[shiftop](shift);
 365                     } else {
 366                         gen_shift_T1_im[shiftop](shift);
 367                     }
 368                 } else if (shiftop == 3) {
 369                     if (logic_cc)
 370                         gen_op_rrxl_T1_cc();
 371                     else
 372                         gen_op_rrxl_T1();
 373                 }
 374             } else {
 375                 rs = (insn >> 8) & 0xf;
 376                 gen_movl_T0_reg(s, rs);
 377                 if (logic_cc) {
 378                     gen_shift_T1_T0_cc[shiftop]();
 379                 } else {
 380                     gen_shift_T1_T0[shiftop]();
 381                 }
 382             }
 383         }
 384         if (op1 != 0x0f && op1 != 0x0d) {
 385             rn = (insn >> 16) & 0xf;
 386             gen_movl_T0_reg(s, rn);
 387         }
 388         rd = (insn >> 12) & 0xf;
 389         switch(op1) {
 390         case 0x00:
 391             gen_op_andl_T0_T1();
 392             gen_movl_reg_T0(s, rd);
 393             if (logic_cc)
 394                 gen_op_logic_T0_cc();
 395             break;
 396         case 0x01:
 397             gen_op_xorl_T0_T1();
 398             gen_movl_reg_T0(s, rd);
 399             if (logic_cc)
 400                 gen_op_logic_T0_cc();
 401             break;
 402         case 0x02:
 403             if (set_cc)
 404                 gen_op_subl_T0_T1_cc();
 405             else
 406                 gen_op_subl_T0_T1();
 407             gen_movl_reg_T0(s, rd);
 408             break;
 409         case 0x03:
 410             if (set_cc)
 411                 gen_op_rsbl_T0_T1_cc();
 412             else
 413                 gen_op_rsbl_T0_T1();
 414             gen_movl_reg_T0(s, rd);
 415             break;
 416         case 0x04:
 417             if (set_cc)
 418                 gen_op_addl_T0_T1_cc();
 419             else
 420                 gen_op_addl_T0_T1();
 421             gen_movl_reg_T0(s, rd);
 422             break;
 423         case 0x05:
 424             if (set_cc)
 425                 gen_op_adcl_T0_T1_cc();
 426             else
 427                 gen_op_adcl_T0_T1();
 428             gen_movl_reg_T0(s, rd);
 429             break;
 430         case 0x06:
 431             if (set_cc)
 432                 gen_op_sbcl_T0_T1_cc();
 433             else
 434                 gen_op_sbcl_T0_T1();
 435             gen_movl_reg_T0(s, rd);
 436             break;
 437         case 0x07:
 438             if (set_cc)
 439                 gen_op_rscl_T0_T1_cc();
 440             else
 441                 gen_op_rscl_T0_T1();
 442             gen_movl_reg_T0(s, rd);
 443             break;
 444         case 0x08:
 445             if (set_cc) {
 446                 gen_op_andl_T0_T1();
 447                 gen_op_logic_T0_cc();
 448             }
 449             break;
 450         case 0x09:
 451             if (set_cc) {
 452                 gen_op_xorl_T0_T1();
 453                 gen_op_logic_T0_cc();
 454             }
 455             break;
 456         case 0x0a:
 457             if (set_cc) {
 458                 gen_op_subl_T0_T1_cc();
 459             }
 460             break;
 461         case 0x0b:
 462             if (set_cc) {
 463                 gen_op_addl_T0_T1_cc();
 464             }
 465             break;
 466         case 0x0c:
 467             gen_op_orl_T0_T1();
 468             gen_movl_reg_T0(s, rd);
 469             if (logic_cc)
 470                 gen_op_logic_T0_cc();
 471             break;
 472         case 0x0d:
 473             gen_movl_reg_T1(s, rd);
 474             if (logic_cc)
 475                 gen_op_logic_T1_cc();
 476             break;
 477         case 0x0e:
 478             gen_op_bicl_T0_T1();
 479             gen_movl_reg_T0(s, rd);
 480             if (logic_cc)
 481                 gen_op_logic_T0_cc();
 482             break;
 483         default:
 484         case 0x0f:
 485             gen_op_notl_T1();
 486             gen_movl_reg_T1(s, rd);
 487             if (logic_cc)
 488                 gen_op_logic_T1_cc();
 489             break;
 490         }
 491     } else {
 492         /* other instructions */
 493         op1 = (insn >> 24) & 0xf;
 494         switch(op1) {
 495         case 0x0:
 496         case 0x1:
 497             sh = (insn >> 5) & 3;
 498             if (sh == 0) {
 499                 if (op1 == 0x0) {
 500                     rd = (insn >> 16) & 0xf;
 501                     rn = (insn >> 12) & 0xf;
 502                     rs = (insn >> 8) & 0xf;
 503                     rm = (insn) & 0xf;
 504                     if (!(insn & (1 << 23))) {
 505                         /* 32 bit mul */
 506                         gen_movl_T0_reg(s, rs);
 507                         gen_movl_T1_reg(s, rm);
 508                         gen_op_mul_T0_T1();
 509                         if (insn & (1 << 21)) {
 510                             gen_movl_T1_reg(s, rn);
 511                             gen_op_addl_T0_T1();
 512                         }
 513                         if (insn & (1 << 20))
 514                             gen_op_logic_T0_cc();
 515                         gen_movl_reg_T0(s, rd);
 516                     } else {
 517                         /* 64 bit mul */
 518                         gen_movl_T0_reg(s, rs);
 519                         gen_movl_T1_reg(s, rm);
 520                         if (insn & (1 << 22))
 521                             gen_op_imull_T0_T1();
 522                         else
 523                             gen_op_mull_T0_T1();
 524                         if (insn & (1 << 21))
 525                             gen_op_addq_T0_T1(rn, rd);
 526                         if (insn & (1 << 20))
 527                             gen_op_logicq_cc();
 528                         gen_movl_reg_T0(s, rn);
 529                         gen_movl_reg_T1(s, rd);
 530                     }
 531                 } else {
 532                     /* SWP instruction */
 533                     rn = (insn >> 16) & 0xf;
 534                     rd = (insn >> 12) & 0xf;
 535                     rm = (insn) & 0xf;
 536
 537                     gen_movl_T0_reg(s, rm);
 538                     gen_movl_T1_reg(s, rn);
 539                     if (insn & (1 << 22)) {
 540                         gen_op_swpb_T0_T1();
 541                     } else {
 542                         gen_op_swpl_T0_T1();
 543                     }
 544                     gen_movl_reg_T0(s, rd);
 545                 }
 546             } else {
 547                 /* load/store half word */
 548                 rn = (insn >> 16) & 0xf;
 549                 rd = (insn >> 12) & 0xf;
 550                 gen_movl_T1_reg(s, rn);
 551                 if (insn & (1 << 24))
 552                     gen_add_datah_offset(s, insn);
 553                 if (insn & (1 << 20)) {
 554                     /* load */
 555                     switch(sh) {
 556                     case 1:
 557                         gen_op_lduw_T0_T1();
 558                         break;
 559                     case 2:
 560                         gen_op_ldsb_T0_T1();
 561                         break;
 562                     default:
 563                     case 3:
 564                         gen_op_ldsw_T0_T1();
 565                         break;
 566                     }
 567                     gen_movl_reg_T0(s, rd);
 568                 } else {
 569                     /* store */
 570                     gen_movl_T0_reg(s, rd);
 571                     gen_op_stw_T0_T1();
 572                 }
 573                 if (!(insn & (1 << 24))) {
 574                     gen_add_datah_offset(s, insn);
 575                     gen_movl_reg_T1(s, rn);
 576                 } else if (insn & (1 << 21)) {
 577                     gen_movl_reg_T1(s, rn);
 578                 }
 579             }
 580             break;
 581         case 0x4:
 582         case 0x5:
 583         case 0x6:
 584         case 0x7:
 585             /* load/store byte/word */
 586             rn = (insn >> 16) & 0xf;
 587             rd = (insn >> 12) & 0xf;
 588             gen_movl_T1_reg(s, rn);
 589             if (insn & (1 << 24))
 590                 gen_add_data_offset(s, insn);
 591             if (insn & (1 << 20)) {
 592                 /* load */
 593                 if (insn & (1 << 22))
 594                     gen_op_ldub_T0_T1();
 595                 else
 596                     gen_op_ldl_T0_T1();
 597                 gen_movl_reg_T0(s, rd);
 598             } else {
 599                 /* store */
 600                 gen_movl_T0_reg(s, rd);
 601                 if (insn & (1 << 22))
 602                     gen_op_stb_T0_T1();
 603                 else
 604                     gen_op_stl_T0_T1();
 605             }
 606             if (!(insn & (1 << 24))) {
 607                 gen_add_data_offset(s, insn);
 608                 gen_movl_reg_T1(s, rn);
 609             } else if (insn & (1 << 21))
 610                 gen_movl_reg_T1(s, rn); {
 611             }
 612             break;
 613         case 0x08:
 614         case 0x09:
 615             {
 616                 int j, n;
 617                 /* load/store multiple words */
 618                 /* XXX: store correct base if write back */
 619                 if (insn & (1 << 22))
 620                     goto illegal_op; /* only usable in supervisor mode */
 621                 rn = (insn >> 16) & 0xf;
 622                 gen_movl_T1_reg(s, rn);
 623
 624                 /* compute total size */
 625                 n = 0;
 626                 for(i=0;i<16;i++) {
 627                     if (insn & (1 << i))
 628                         n++;
 629                 }
 630                 /* XXX: test invalid n == 0 case ? */
 631                 if (insn & (1 << 23)) {
 632                     if (insn & (1 << 24)) {
 633                         /* pre increment */
 634                         gen_op_addl_T1_im(4);
 635                     } else {
 636                         /* post increment */
 637                     }
 638                 } else {
 639                     if (insn & (1 << 24)) {
 640                         /* pre decrement */
 641                         gen_op_addl_T1_im(-(n * 4));
 642                     } else {
 643                         /* post decrement */
 644                         if (n != 1)
 645                             gen_op_addl_T1_im(-((n - 1) * 4));
 646                     }
 647                 }
 648                 j = 0;
 649                 for(i=0;i<16;i++) {
 650                     if (insn & (1 << i)) {
 651                         if (insn & (1 << 20)) {
 652                             /* load */
 653                             gen_op_ldl_T0_T1();
 654                             gen_movl_reg_T0(s, i);
 655                         } else {
 656                             /* store */
 657                             if (i == 15) {
 658                                 /* special case: r15 = PC + 12 */
 659                                 val = (long)s->pc + 8;
 660                                 gen_op_movl_TN_im[0](val);
 661                             } else {
 662                                 gen_movl_T0_reg(s, i);
 663                             }
 664                             gen_op_stl_T0_T1();
 665                         }
 666                         j++;
 667                         /* no need to add after the last transfer */
 668                         if (j != n)
 669                             gen_op_addl_T1_im(4);
 670                     }
 671                 }
 672                 if (insn & (1 << 21)) {
 673                     /* write back */
 674                     if (insn & (1 << 23)) {
 675                         if (insn & (1 << 24)) {
 676                             /* pre increment */
 677                         } else {
 678                             /* post increment */
 679                             gen_op_addl_T1_im(4);
 680                         }
 681                     } else {
 682                         if (insn & (1 << 24)) {
 683                             /* pre decrement */
 684                             if (n != 1)
 685                                 gen_op_addl_T1_im(-((n - 1) * 4));
 686                         } else {
 687                             /* post decrement */
 688                             gen_op_addl_T1_im(-(n * 4));
 689                         }
 690                     }
 691                     gen_movl_reg_T1(s, rn);
 692                 }
 693             }
 694             break;
 695         case 0xa:
 696         case 0xb:
 697             {
 698                 int offset;
 699
 700                 /* branch (and link) */
 701                 val = (int)s->pc;
 702                 if (insn & (1 << 24)) {
 703                     gen_op_movl_T0_im(val);
 704                     gen_op_movl_reg_TN[0][14]();
 705                 }
 706                 offset = (((int)insn << 8) >> 8);
 707                 val += (offset << 2) + 4;
 708                 gen_op_jmp((long)s->tb, val);
 709                 s->is_jmp = DISAS_TB_JUMP;
 710             }
 711             break;
 712         case 0xf:
 713             /* swi */
 714             gen_op_movl_T0_im((long)s->pc);
 715             gen_op_movl_reg_TN[0][15]();
 716             gen_op_swi();
 717             s->is_jmp = DISAS_JUMP;
 718             break;
 719         default:
 720         illegal_op:
 721             gen_op_movl_T0_im((long)s->pc - 4);
 722             gen_op_movl_reg_TN[0][15]();
 723             gen_op_undef_insn();
 724             s->is_jmp = DISAS_JUMP;
 725             break;
 726         }
 727     }
 728 }
 729
 730 /* generate intermediate code in gen_opc_buf and gen_opparam_buf for
 731    basic block 'tb'. If search_pc is TRUE, also generate PC
 732    information for each intermediate instruction. */
 733 static inline int gen_intermediate_code_internal(CPUState *env,
 734                                                  TranslationBlock *tb,
 735                                                  int search_pc)
 736 {
 737     DisasContext dc1, *dc = &dc1;
 738     uint16_t *gen_opc_end;
 739     int j, lj;
 740     uint8_t *pc_start;
 741
 742     /* generate intermediate code */
 743     pc_start = (uint8_t *)tb->pc;
 744
 745     dc->tb = tb;
 746
 747     gen_opc_ptr = gen_opc_buf;
 748     gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
 749     gen_opparam_ptr = gen_opparam_buf;
 750
 751     dc->is_jmp = DISAS_NEXT;
 752     dc->pc = pc_start;
 753     lj = -1;
 754     do {
 755         if (search_pc) {
 756             j = gen_opc_ptr - gen_opc_buf;
 757             if (lj < j) {
 758                 lj++;
 759                 while (lj < j)
 760                     gen_opc_instr_start[lj++] = 0;
 761             }
 762             gen_opc_pc[lj] = (uint32_t)dc->pc;
 763             gen_opc_instr_start[lj] = 1;
 764         }
 765         disas_arm_insn(dc);
 766     } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
 767              (dc->pc - pc_start) < (TARGET_PAGE_SIZE - 32));
 768     switch(dc->is_jmp) {
 769     case DISAS_JUMP_NEXT:
 770     case DISAS_NEXT:
 771         gen_op_jmp((long)dc->tb, (long)dc->pc);
 772         break;
 773     default:
 774     case DISAS_JUMP:
 775         /* indicate that the hash table must be used to find the next TB */
 776         gen_op_movl_T0_0();
 777         gen_op_exit_tb();
 778         break;
 779     case DISAS_TB_JUMP:
 780         /* nothing more to generate */
 781         break;
 782     }
 783     *gen_opc_ptr = INDEX_op_end;
 784
 785 #ifdef DEBUG_DISAS
 786     if (loglevel & CPU_LOG_TB_IN_ASM) {
 787         fprintf(logfile, "----------------\n");
 788         fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
 789         disas(logfile, pc_start, dc->pc - pc_start, 0, 0);
 790         fprintf(logfile, "\n");
 791         if (loglevel & (CPU_LOG_TB_OP)) {
 792             fprintf(logfile, "OP:\n");
 793             dump_ops(gen_opc_buf, gen_opparam_buf);
 794             fprintf(logfile, "\n");
 795         }
 796     }
 797 #endif
 798     if (!search_pc)
 799         tb->size = dc->pc - pc_start;
 800     return 0;
 801 }
 802
 803 int gen_intermediate_code(CPUState *env, TranslationBlock *tb)
 804 {
 805     return gen_intermediate_code_internal(env, tb, 0);
 806 }
 807
 808 int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
 809 {
 810     return gen_intermediate_code_internal(env, tb, 1);
 811 }
 812
 813 CPUARMState *cpu_arm_init(void)
 814 {
 815     CPUARMState *env;
 816
 817     cpu_exec_init();
 818
 819     env = malloc(sizeof(CPUARMState));
 820     if (!env)
 821         return NULL;
 822     memset(env, 0, sizeof(CPUARMState));
 823     cpu_single_env = env;
 824     return env;
 825 }
 826
 827 void cpu_arm_close(CPUARMState *env)
 828 {
 829     free(env);
 830 }
 831
 832 void cpu_dump_state(CPUState *env, FILE *f,
 833                     int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
 834                     int flags)
 835 {
 836     int i;
 837
 838     for(i=0;i<16;i++) {
 839         cpu_fprintf(f, "R%02d=%08x", i, env->regs[i]);
 840         if ((i % 4) == 3)
 841             cpu_fprintf(f, "\n");
 842         else
 843             cpu_fprintf(f, " ");
 844     }
 845     cpu_fprintf(f, "PSR=%08x %c%c%c%c\n",
 846             env->cpsr,
 847             env->cpsr & (1 << 31) ? 'N' : '-',
 848             env->cpsr & (1 << 30) ? 'Z' : '-',
 849             env->cpsr & (1 << 29) ? 'C' : '-',
 850             env->cpsr & (1 << 28) ? 'V' : '-');
 851 }
 852
 853 target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
 854 {
 855     return addr;
 856 }