target-sparc/translate.c

   1 /*
   2    SPARC translation
   3
   4    Copyright (C) 2003 Thomas M. Ogrisegg <tom@fnord.at>
   5    Copyright (C) 2003 Fabrice Bellard
   6
   7    This library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2 of the License, or (at your option) any later version.
  11
  12    This library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with this library; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 /*
  23    TODO-list:
  24
  25    NPC/PC static optimisations (use JUMP_TB when possible)
  26    FPU-Instructions
  27    Privileged instructions
  28    Coprocessor-Instructions
  29    Optimize synthetic instructions
  30    Optional alignment and privileged instruction check
  31 */
  32
  33 #include <stdarg.h>
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <inttypes.h>
  38
  39 #include "cpu.h"
  40 #include "exec-all.h"
  41 #include "disas.h"
  42
  43 #define DEBUG_DISAS
  44
  45 #define DYNAMIC_PC  1 /* dynamic pc value */
  46 #define JUMP_PC     2 /* dynamic pc value which takes only two values
  47                          according to jump_pc[T2] */
  48
  49 typedef struct DisasContext {
  50     target_ulong pc;    /* current Program Counter: integer or DYNAMIC_PC */
  51     target_ulong npc;   /* next PC: integer or DYNAMIC_PC or JUMP_PC */
  52     target_ulong jump_pc[2]; /* used when JUMP_PC pc value is used */
  53     int is_br;
  54     struct TranslationBlock *tb;
  55 } DisasContext;
  56
  57 static uint16_t *gen_opc_ptr;
  58 static uint32_t *gen_opparam_ptr;
  59 extern FILE *logfile;
  60 extern int loglevel;
  61
  62 enum {
  63 #define DEF(s,n,copy_size) INDEX_op_ ## s,
  64 #include "opc.h"
  65 #undef DEF
  66     NB_OPS
  67 };
  68
  69 #include "gen-op.h"
  70
  71 #define GET_FIELD(X, FROM, TO) \
  72   ((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1))
  73
  74 #define IS_IMM (insn & (1<<13))
  75
  76 static void disas_sparc_insn(DisasContext * dc);
  77
  78 static GenOpFunc *gen_op_movl_TN_reg[2][32] = {
  79     {
  80      gen_op_movl_g0_T0,
  81      gen_op_movl_g1_T0,
  82      gen_op_movl_g2_T0,
  83      gen_op_movl_g3_T0,
  84      gen_op_movl_g4_T0,
  85      gen_op_movl_g5_T0,
  86      gen_op_movl_g6_T0,
  87      gen_op_movl_g7_T0,
  88      gen_op_movl_o0_T0,
  89      gen_op_movl_o1_T0,
  90      gen_op_movl_o2_T0,
  91      gen_op_movl_o3_T0,
  92      gen_op_movl_o4_T0,
  93      gen_op_movl_o5_T0,
  94      gen_op_movl_o6_T0,
  95      gen_op_movl_o7_T0,
  96      gen_op_movl_l0_T0,
  97      gen_op_movl_l1_T0,
  98      gen_op_movl_l2_T0,
  99      gen_op_movl_l3_T0,
 100      gen_op_movl_l4_T0,
 101      gen_op_movl_l5_T0,
 102      gen_op_movl_l6_T0,
 103      gen_op_movl_l7_T0,
 104      gen_op_movl_i0_T0,
 105      gen_op_movl_i1_T0,
 106      gen_op_movl_i2_T0,
 107      gen_op_movl_i3_T0,
 108      gen_op_movl_i4_T0,
 109      gen_op_movl_i5_T0,
 110      gen_op_movl_i6_T0,
 111      gen_op_movl_i7_T0,
 112      },
 113     {
 114      gen_op_movl_g0_T1,
 115      gen_op_movl_g1_T1,
 116      gen_op_movl_g2_T1,
 117      gen_op_movl_g3_T1,
 118      gen_op_movl_g4_T1,
 119      gen_op_movl_g5_T1,
 120      gen_op_movl_g6_T1,
 121      gen_op_movl_g7_T1,
 122      gen_op_movl_o0_T1,
 123      gen_op_movl_o1_T1,
 124      gen_op_movl_o2_T1,
 125      gen_op_movl_o3_T1,
 126      gen_op_movl_o4_T1,
 127      gen_op_movl_o5_T1,
 128      gen_op_movl_o6_T1,
 129      gen_op_movl_o7_T1,
 130      gen_op_movl_l0_T1,
 131      gen_op_movl_l1_T1,
 132      gen_op_movl_l2_T1,
 133      gen_op_movl_l3_T1,
 134      gen_op_movl_l4_T1,
 135      gen_op_movl_l5_T1,
 136      gen_op_movl_l6_T1,
 137      gen_op_movl_l7_T1,
 138      gen_op_movl_i0_T1,
 139      gen_op_movl_i1_T1,
 140      gen_op_movl_i2_T1,
 141      gen_op_movl_i3_T1,
 142      gen_op_movl_i4_T1,
 143      gen_op_movl_i5_T1,
 144      gen_op_movl_i6_T1,
 145      gen_op_movl_i7_T1,
 146      }
 147 };
 148
 149 static GenOpFunc *gen_op_movl_reg_TN[3][32] = {
 150     {
 151      gen_op_movl_T0_g0,
 152      gen_op_movl_T0_g1,
 153      gen_op_movl_T0_g2,
 154      gen_op_movl_T0_g3,
 155      gen_op_movl_T0_g4,
 156      gen_op_movl_T0_g5,
 157      gen_op_movl_T0_g6,
 158      gen_op_movl_T0_g7,
 159      gen_op_movl_T0_o0,
 160      gen_op_movl_T0_o1,
 161      gen_op_movl_T0_o2,
 162      gen_op_movl_T0_o3,
 163      gen_op_movl_T0_o4,
 164      gen_op_movl_T0_o5,
 165      gen_op_movl_T0_o6,
 166      gen_op_movl_T0_o7,
 167      gen_op_movl_T0_l0,
 168      gen_op_movl_T0_l1,
 169      gen_op_movl_T0_l2,
 170      gen_op_movl_T0_l3,
 171      gen_op_movl_T0_l4,
 172      gen_op_movl_T0_l5,
 173      gen_op_movl_T0_l6,
 174      gen_op_movl_T0_l7,
 175      gen_op_movl_T0_i0,
 176      gen_op_movl_T0_i1,
 177      gen_op_movl_T0_i2,
 178      gen_op_movl_T0_i3,
 179      gen_op_movl_T0_i4,
 180      gen_op_movl_T0_i5,
 181      gen_op_movl_T0_i6,
 182      gen_op_movl_T0_i7,
 183      },
 184     {
 185      gen_op_movl_T1_g0,
 186      gen_op_movl_T1_g1,
 187      gen_op_movl_T1_g2,
 188      gen_op_movl_T1_g3,
 189      gen_op_movl_T1_g4,
 190      gen_op_movl_T1_g5,
 191      gen_op_movl_T1_g6,
 192      gen_op_movl_T1_g7,
 193      gen_op_movl_T1_o0,
 194      gen_op_movl_T1_o1,
 195      gen_op_movl_T1_o2,
 196      gen_op_movl_T1_o3,
 197      gen_op_movl_T1_o4,
 198      gen_op_movl_T1_o5,
 199      gen_op_movl_T1_o6,
 200      gen_op_movl_T1_o7,
 201      gen_op_movl_T1_l0,
 202      gen_op_movl_T1_l1,
 203      gen_op_movl_T1_l2,
 204      gen_op_movl_T1_l3,
 205      gen_op_movl_T1_l4,
 206      gen_op_movl_T1_l5,
 207      gen_op_movl_T1_l6,
 208      gen_op_movl_T1_l7,
 209      gen_op_movl_T1_i0,
 210      gen_op_movl_T1_i1,
 211      gen_op_movl_T1_i2,
 212      gen_op_movl_T1_i3,
 213      gen_op_movl_T1_i4,
 214      gen_op_movl_T1_i5,
 215      gen_op_movl_T1_i6,
 216      gen_op_movl_T1_i7,
 217      },
 218     {
 219      gen_op_movl_T2_g0,
 220      gen_op_movl_T2_g1,
 221      gen_op_movl_T2_g2,
 222      gen_op_movl_T2_g3,
 223      gen_op_movl_T2_g4,
 224      gen_op_movl_T2_g5,
 225      gen_op_movl_T2_g6,
 226      gen_op_movl_T2_g7,
 227      gen_op_movl_T2_o0,
 228      gen_op_movl_T2_o1,
 229      gen_op_movl_T2_o2,
 230      gen_op_movl_T2_o3,
 231      gen_op_movl_T2_o4,
 232      gen_op_movl_T2_o5,
 233      gen_op_movl_T2_o6,
 234      gen_op_movl_T2_o7,
 235      gen_op_movl_T2_l0,
 236      gen_op_movl_T2_l1,
 237      gen_op_movl_T2_l2,
 238      gen_op_movl_T2_l3,
 239      gen_op_movl_T2_l4,
 240      gen_op_movl_T2_l5,
 241      gen_op_movl_T2_l6,
 242      gen_op_movl_T2_l7,
 243      gen_op_movl_T2_i0,
 244      gen_op_movl_T2_i1,
 245      gen_op_movl_T2_i2,
 246      gen_op_movl_T2_i3,
 247      gen_op_movl_T2_i4,
 248      gen_op_movl_T2_i5,
 249      gen_op_movl_T2_i6,
 250      gen_op_movl_T2_i7,
 251      }
 252 };
 253
 254 static GenOpFunc1 *gen_op_movl_TN_im[3] = {
 255     gen_op_movl_T0_im,
 256     gen_op_movl_T1_im,
 257     gen_op_movl_T2_im
 258 };
 259
 260 static inline void gen_movl_imm_TN(int reg, int imm)
 261 {
 262     gen_op_movl_TN_im[reg] (imm);
 263 }
 264
 265 static inline void gen_movl_imm_T1(int val)
 266 {
 267     gen_movl_imm_TN(1, val);
 268 }
 269
 270 static inline void gen_movl_imm_T0(int val)
 271 {
 272     gen_movl_imm_TN(0, val);
 273 }
 274
 275 static inline void gen_movl_reg_TN(int reg, int t)
 276 {
 277     if (reg)
 278         gen_op_movl_reg_TN[t][reg] ();
 279     else
 280         gen_movl_imm_TN(t, 0);
 281 }
 282
 283 static inline void gen_movl_reg_T0(int reg)
 284 {
 285     gen_movl_reg_TN(reg, 0);
 286 }
 287
 288 static inline void gen_movl_reg_T1(int reg)
 289 {
 290     gen_movl_reg_TN(reg, 1);
 291 }
 292
 293 static inline void gen_movl_reg_T2(int reg)
 294 {
 295     gen_movl_reg_TN(reg, 2);
 296 }
 297
 298 static inline void gen_movl_TN_reg(int reg, int t)
 299 {
 300     if (reg)
 301         gen_op_movl_TN_reg[t][reg] ();
 302 }
 303
 304 static inline void gen_movl_T0_reg(int reg)
 305 {
 306     gen_movl_TN_reg(reg, 0);
 307 }
 308
 309 static inline void gen_movl_T1_reg(int reg)
 310 {
 311     gen_movl_TN_reg(reg, 1);
 312 }
 313
 314 /* call this function before using T2 as it may have been set for a jump */
 315 static inline void flush_T2(DisasContext * dc)
 316 {
 317     if (dc->npc == JUMP_PC) {
 318         gen_op_generic_branch(dc->jump_pc[0], dc->jump_pc[1]);
 319         dc->npc = DYNAMIC_PC;
 320     }
 321 }
 322
 323 static inline void save_npc(DisasContext * dc)
 324 {
 325     if (dc->npc == JUMP_PC) {
 326         gen_op_generic_branch(dc->jump_pc[0], dc->jump_pc[1]);
 327         dc->npc = DYNAMIC_PC;
 328     } else if (dc->npc != DYNAMIC_PC) {
 329         gen_op_movl_npc_im(dc->npc);
 330     }
 331 }
 332
 333 static inline void save_state(DisasContext * dc)
 334 {
 335     gen_op_jmp_im((uint32_t)dc->pc);
 336     save_npc(dc);
 337 }
 338
 339 static void gen_cond(int cond)
 340 {
 341         switch (cond) {
 342         case 0x0:
 343             gen_op_movl_T2_0();
 344             break;
 345         case 0x1:
 346             gen_op_eval_be();
 347             break;
 348         case 0x2:
 349             gen_op_eval_ble();
 350             break;
 351         case 0x3:
 352             gen_op_eval_bl();
 353             break;
 354         case 0x4:
 355             gen_op_eval_bleu();
 356             break;
 357         case 0x5:
 358             gen_op_eval_bcs();
 359             break;
 360         case 0x6:
 361             gen_op_eval_bneg();
 362             break;
 363         case 0x7:
 364             gen_op_eval_bvs();
 365             break;
 366         case 0x8:
 367             gen_op_movl_T2_1();
 368             break;
 369         case 0x9:
 370             gen_op_eval_bne();
 371             break;
 372         case 0xa:
 373             gen_op_eval_bg();
 374             break;
 375         case 0xb:
 376             gen_op_eval_bge();
 377             break;
 378         case 0xc:
 379             gen_op_eval_bgu();
 380             break;
 381         case 0xd:
 382             gen_op_eval_bcc();
 383             break;
 384         case 0xe:
 385             gen_op_eval_bpos();
 386             break;
 387         default:
 388         case 0xf:
 389             gen_op_eval_bvc();
 390             break;
 391         }
 392 }
 393
 394
 395 static void do_branch(DisasContext * dc, uint32_t target, uint32_t insn)
 396 {
 397     unsigned int cond = GET_FIELD(insn, 3, 6), a = (insn & (1 << 29));
 398     target += (uint32_t) dc->pc;
 399     if (cond == 0x0) {
 400         /* unconditional not taken */
 401         if (a) {
 402             dc->pc = dc->npc + 4;
 403             dc->npc = dc->pc + 4;
 404         } else {
 405             dc->pc = dc->npc;
 406             dc->npc = dc->pc + 4;
 407         }
 408     } else if (cond == 0x8) {
 409         /* unconditional taken */
 410         if (a) {
 411             dc->pc = target;
 412             dc->npc = dc->pc + 4;
 413         } else {
 414             dc->pc = dc->npc;
 415             dc->npc = target;
 416         }
 417     } else {
 418         flush_T2(dc);
 419         gen_cond(cond);
 420         if (a) {
 421             gen_op_branch_a((long)dc->tb, target, dc->npc);
 422             dc->is_br = 1;
 423         } else {
 424             dc->pc = dc->npc;
 425             dc->jump_pc[0] = target;
 426             dc->jump_pc[1] = dc->npc + 4;
 427             dc->npc = JUMP_PC;
 428         }
 429     }
 430 }
 431
 432 #define GET_FIELDs(x,a,b) sign_extend (GET_FIELD(x,a,b), (b) - (a) + 1)
 433
 434 static int sign_extend(int x, int len)
 435 {
 436     len = 32 - len;
 437     return (x << len) >> len;
 438 }
 439
 440 static void disas_sparc_insn(DisasContext * dc)
 441 {
 442     unsigned int insn, opc, rs1, rs2, rd;
 443
 444     insn = ldl_code((uint8_t *)dc->pc);
 445     opc = GET_FIELD(insn, 0, 1);
 446
 447     rd = GET_FIELD(insn, 2, 6);
 448     switch (opc) {
 449     case 0:                     /* branches/sethi */
 450         {
 451             unsigned int xop = GET_FIELD(insn, 7, 9);
 452             int target;
 453             target = GET_FIELD(insn, 10, 31);
 454             switch (xop) {
 455             case 0x0:
 456             case 0x1:           /* UNIMPL */
 457                 goto illegal_insn;
 458             case 0x2:           /* BN+x */
 459                 {
 460                     target <<= 2;
 461                     target = sign_extend(target, 22);
 462                     do_branch(dc, target, insn);
 463                     goto jmp_insn;
 464                 }
 465             case 0x3:           /* FBN+x */
 466                 break;
 467             case 0x4:           /* SETHI */
 468                 gen_movl_imm_T0(target << 10);
 469                 gen_movl_T0_reg(rd);
 470                 break;
 471             case 0x5:           /*CBN+x */
 472                 break;
 473             }
 474             break;
 475         }
 476     case 1:
 477         /*CALL*/ {
 478             unsigned int target = GET_FIELDs(insn, 2, 31) << 2;
 479
 480             gen_op_movl_T0_im((long) (dc->pc));
 481             gen_movl_T0_reg(15);
 482             target = dc->pc + target;
 483             dc->pc = dc->npc;
 484             dc->npc = target;
 485         }
 486         goto jmp_insn;
 487     case 2:                     /* FPU & Logical Operations */
 488         {
 489             unsigned int xop = GET_FIELD(insn, 7, 12);
 490             if (xop == 0x3a) {  /* generate trap */
 491                 int cond;
 492                 rs1 = GET_FIELD(insn, 13, 17);
 493                 gen_movl_reg_T0(rs1);
 494                 if (IS_IMM) {
 495                     gen_movl_imm_T1(GET_FIELD(insn, 25, 31));
 496                 } else {
 497                     rs2 = GET_FIELD(insn, 27, 31);
 498                     gen_movl_reg_T1(rs2);
 499                 }
 500                 gen_op_add_T1_T0();
 501                 save_state(dc);
 502                 cond = GET_FIELD(insn, 3, 6);
 503                 if (cond == 0x8) {
 504                     gen_op_trap_T0();
 505                     dc->is_br = 1;
 506                     goto jmp_insn;
 507                 } else {
 508                     gen_op_trapcc_T0();
 509                 }
 510             } else if (xop == 0x28) {
 511                 rs1 = GET_FIELD(insn, 13, 17);
 512                 switch(rs1) {
 513                 case 0: /* rdy */
 514                     gen_op_rdy();
 515                     gen_movl_T0_reg(rd);
 516                     break;
 517                 default:
 518                     goto illegal_insn;
 519                 }
 520             } else if (xop == 0x34 || xop == 0x35) {    /* FPU Operations */
 521                 goto illegal_insn;
 522             } else {
 523                 rs1 = GET_FIELD(insn, 13, 17);
 524                 gen_movl_reg_T0(rs1);
 525                 if (IS_IMM) {   /* immediate */
 526                     rs2 = GET_FIELDs(insn, 19, 31);
 527                     gen_movl_imm_T1(rs2);
 528                 } else {                /* register */
 529                     rs2 = GET_FIELD(insn, 27, 31);
 530                     gen_movl_reg_T1(rs2);
 531                 }
 532                 if (xop < 0x20) {
 533                     switch (xop & ~0x10) {
 534                     case 0x0:
 535                         if (xop & 0x10)
 536                             gen_op_add_T1_T0_cc();
 537                         else
 538                             gen_op_add_T1_T0();
 539                         break;
 540                     case 0x1:
 541                         gen_op_and_T1_T0();
 542                         if (xop & 0x10)
 543                             gen_op_logic_T0_cc();
 544                         break;
 545                     case 0x2:
 546                         gen_op_or_T1_T0();
 547                         if (xop & 0x10)
 548                             gen_op_logic_T0_cc();
 549                         break;
 550                     case 0x3:
 551                         gen_op_xor_T1_T0();
 552                         if (xop & 0x10)
 553                             gen_op_logic_T0_cc();
 554                         break;
 555                     case 0x4:
 556                         if (xop & 0x10)
 557                             gen_op_sub_T1_T0_cc();
 558                         else
 559                             gen_op_sub_T1_T0();
 560                         break;
 561                     case 0x5:
 562                         gen_op_andn_T1_T0();
 563                         if (xop & 0x10)
 564                             gen_op_logic_T0_cc();
 565                         break;
 566                     case 0x6:
 567                         gen_op_orn_T1_T0();
 568                         if (xop & 0x10)
 569                             gen_op_logic_T0_cc();
 570                         break;
 571                     case 0x7:
 572                         gen_op_xnor_T1_T0();
 573                         if (xop & 0x10)
 574                             gen_op_logic_T0_cc();
 575                         break;
 576                     case 0x8:
 577                         gen_op_addx_T1_T0();
 578                         if (xop & 0x10)
 579                             gen_op_set_flags();
 580                         break;
 581                     case 0xa:
 582                         gen_op_umul_T1_T0();
 583                         if (xop & 0x10)
 584                             gen_op_logic_T0_cc();
 585                         break;
 586                     case 0xb:
 587                         gen_op_smul_T1_T0();
 588                         if (xop & 0x10)
 589                             gen_op_logic_T0_cc();
 590                         break;
 591                     case 0xc:
 592                         gen_op_subx_T1_T0();
 593                         if (xop & 0x10)
 594                             gen_op_set_flags();
 595                         break;
 596                     case 0xe:
 597                         gen_op_udiv_T1_T0();
 598                         if (xop & 0x10)
 599                             gen_op_div_cc();
 600                         break;
 601                     case 0xf:
 602                         gen_op_sdiv_T1_T0();
 603                         if (xop & 0x10)
 604                             gen_op_div_cc();
 605                         break;
 606                     default:
 607                         goto illegal_insn;
 608                     }
 609                     gen_movl_T0_reg(rd);
 610                 } else {
 611                     switch (xop) {
 612                     case 0x24: /* mulscc */
 613                         gen_op_mulscc_T1_T0();
 614                         gen_movl_T0_reg(rd);
 615                         break;
 616                     case 0x25:  /* SLL */
 617                         gen_op_sll();
 618                         gen_movl_T0_reg(rd);
 619                         break;
 620                     case 0x26:
 621                         gen_op_srl();
 622                         gen_movl_T0_reg(rd);
 623                         break;
 624                     case 0x27:
 625                         gen_op_sra();
 626                         gen_movl_T0_reg(rd);
 627                         break;
 628                     case 0x30:
 629                         {
 630                             gen_op_xor_T1_T0();
 631                             switch(rd) {
 632                             case 0:
 633                                 gen_op_wry();
 634                                 break;
 635                             default:
 636                                 goto illegal_insn;
 637                             }
 638                         }
 639                         break;
 640                     case 0x38:  /* jmpl */
 641                         {
 642                             gen_op_add_T1_T0();
 643                             gen_op_movl_npc_T0();
 644                             if (rd != 0) {
 645                                 gen_op_movl_T0_im((long) (dc->pc));
 646                                 gen_movl_T0_reg(rd);
 647                             }
 648                             dc->pc = dc->npc;
 649                             dc->npc = DYNAMIC_PC;
 650                         }
 651                         goto jmp_insn;
 652                     case 0x3b: /* flush */
 653                         gen_op_add_T1_T0();
 654                         gen_op_flush_T0();
 655                         break;
 656                     case 0x3c:  /* save */
 657                         save_state(dc);
 658                         gen_op_add_T1_T0();
 659                         gen_op_save();
 660                         gen_movl_T0_reg(rd);
 661                         break;
 662                     case 0x3d:  /* restore */
 663                         save_state(dc);
 664                         gen_op_add_T1_T0();
 665                         gen_op_restore();
 666                         gen_movl_T0_reg(rd);
 667                         break;
 668                     default:
 669                         goto illegal_insn;
 670                     }
 671                 }
 672             }
 673             break;
 674         }
 675     case 3:                     /* load/store instructions */
 676         {
 677             unsigned int xop = GET_FIELD(insn, 7, 12);
 678             rs1 = GET_FIELD(insn, 13, 17);
 679             gen_movl_reg_T0(rs1);
 680             if (IS_IMM) {       /* immediate */
 681                 rs2 = GET_FIELDs(insn, 19, 31);
 682                 gen_movl_imm_T1(rs2);
 683             } else {            /* register */
 684                 rs2 = GET_FIELD(insn, 27, 31);
 685                 gen_movl_reg_T1(rs2);
 686             }
 687             gen_op_add_T1_T0();
 688             if (xop < 4 || xop > 7) {
 689                 switch (xop) {
 690                 case 0x0:       /* load word */
 691                     gen_op_ld();
 692                     break;
 693                 case 0x1:       /* load unsigned byte */
 694                     gen_op_ldub();
 695                     break;
 696                 case 0x2:       /* load unsigned halfword */
 697                     gen_op_lduh();
 698                     break;
 699                 case 0x3:       /* load double word */
 700                     gen_op_ldd();
 701                     gen_movl_T0_reg(rd + 1);
 702                     break;
 703                 case 0x9:       /* load signed byte */
 704                     gen_op_ldsb();
 705                     break;
 706                 case 0xa:       /* load signed halfword */
 707                     gen_op_ldsh();
 708                     break;
 709                 case 0xd:       /* ldstub -- XXX: should be atomically */
 710                     gen_op_ldstub();
 711                     break;
 712                 case 0x0f:      /* swap register with memory. Also atomically */
 713                     gen_op_swap();
 714                     break;
 715                 }
 716                 gen_movl_T1_reg(rd);
 717             } else if (xop < 8) {
 718                 gen_movl_reg_T1(rd);
 719                 switch (xop) {
 720                 case 0x4:
 721                     gen_op_st();
 722                     break;
 723                 case 0x5:
 724                     gen_op_stb();
 725                     break;
 726                 case 0x6:
 727                     gen_op_sth();
 728                     break;
 729                 case 0x7:
 730                     flush_T2(dc);
 731                     gen_movl_reg_T2(rd + 1);
 732                     gen_op_std();
 733                     break;
 734                 }
 735             }
 736         }
 737     }
 738     /* default case for non jump instructions */
 739     if (dc->npc == DYNAMIC_PC) {
 740         dc->pc = DYNAMIC_PC;
 741         gen_op_next_insn();
 742     } else if (dc->npc == JUMP_PC) {
 743         /* we can do a static jump */
 744         gen_op_branch2((long)dc->tb, dc->jump_pc[0], dc->jump_pc[1]);
 745         dc->is_br = 1;
 746     } else {
 747         dc->pc = dc->npc;
 748         dc->npc = dc->npc + 4;
 749     }
 750   jmp_insn:;
 751     return;
 752  illegal_insn:
 753     save_state(dc);
 754     gen_op_exception(TT_ILL_INSN);
 755     dc->is_br = 1;
 756 }
 757
 758 static inline int gen_intermediate_code_internal(TranslationBlock * tb,
 759                                                  int spc)
 760 {
 761     target_ulong pc_start, last_pc;
 762     uint16_t *gen_opc_end;
 763     DisasContext dc1, *dc = &dc1;
 764
 765     memset(dc, 0, sizeof(DisasContext));
 766     if (spc) {
 767         printf("SearchPC not yet supported\n");
 768         exit(0);
 769     }
 770     dc->tb = tb;
 771     pc_start = tb->pc;
 772     dc->pc = pc_start;
 773     dc->npc = (target_ulong) tb->cs_base;
 774
 775     gen_opc_ptr = gen_opc_buf;
 776     gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
 777     gen_opparam_ptr = gen_opparam_buf;
 778
 779     do {
 780         last_pc = dc->pc;
 781         disas_sparc_insn(dc);
 782         if (dc->is_br)
 783             break;
 784         /* if the next PC is different, we abort now */
 785         if (dc->pc != (last_pc + 4))
 786             break;
 787     } while ((gen_opc_ptr < gen_opc_end) &&
 788              (dc->pc - pc_start) < (TARGET_PAGE_SIZE - 32));
 789     if (!dc->is_br) {
 790         if (dc->pc != DYNAMIC_PC &&
 791             (dc->npc != DYNAMIC_PC && dc->npc != JUMP_PC)) {
 792             /* static PC and NPC: we can use direct chaining */
 793             gen_op_branch((long)tb, dc->pc, dc->npc);
 794         } else {
 795             if (dc->pc != DYNAMIC_PC)
 796                 gen_op_jmp_im(dc->pc);
 797             save_npc(dc);
 798             gen_op_movl_T0_0();
 799             gen_op_exit_tb();
 800         }
 801     }
 802     *gen_opc_ptr = INDEX_op_end;
 803 #ifdef DEBUG_DISAS
 804     if (loglevel & CPU_LOG_TB_IN_ASM) {
 805         fprintf(logfile, "--------------\n");
 806         fprintf(logfile, "IN: %s\n", lookup_symbol((uint8_t *)pc_start));
 807         disas(logfile, (uint8_t *)pc_start, last_pc + 4 - pc_start, 0, 0);
 808         fprintf(logfile, "\n");
 809         if (loglevel & CPU_LOG_TB_OP) {
 810             fprintf(logfile, "OP:\n");
 811             dump_ops(gen_opc_buf, gen_opparam_buf);
 812             fprintf(logfile, "\n");
 813         }
 814     }
 815 #endif
 816
 817     return 0;
 818 }
 819
 820 int gen_intermediate_code(CPUSPARCState * env, TranslationBlock * tb)
 821 {
 822     return gen_intermediate_code_internal(tb, 0);
 823 }
 824
 825 int gen_intermediate_code_pc(CPUSPARCState * env, TranslationBlock * tb)
 826 {
 827     return gen_intermediate_code_internal(tb, 1);
 828 }
 829
 830 CPUSPARCState *cpu_sparc_init(void)
 831 {
 832     CPUSPARCState *env;
 833
 834     cpu_exec_init();
 835
 836     if (!(env = malloc(sizeof(CPUSPARCState))))
 837         return (NULL);
 838     memset(env, 0, sizeof(*env));
 839     env->cwp = 0;
 840     env->wim = 1;
 841     env->regwptr = env->regbase + (env->cwp * 16);
 842     env->user_mode_only = 1;
 843     cpu_single_env = env;
 844     return (env);
 845 }
 846
 847 #define GET_FLAG(a,b) ((env->psr & a)?b:'-')
 848
 849 void cpu_sparc_dump_state(CPUSPARCState * env, FILE * f, int flags)
 850 {
 851     int i, x;
 852
 853     fprintf(f, "pc: 0x%08x  npc: 0x%08x\n", (int) env->pc, (int) env->npc);
 854     fprintf(f, "General Registers:\n");
 855     for (i = 0; i < 4; i++)
 856         fprintf(f, "%%g%c: 0x%08x\t", i + '0', env->gregs[i]);
 857     fprintf(f, "\n");
 858     for (; i < 8; i++)
 859         fprintf(f, "%%g%c: 0x%08x\t", i + '0', env->gregs[i]);
 860     fprintf(f, "\nCurrent Register Window:\n");
 861     for (x = 0; x < 3; x++) {
 862         for (i = 0; i < 4; i++)
 863             fprintf(f, "%%%c%d: 0x%08x\t",
 864                     (x == 0 ? 'o' : (x == 1 ? 'l' : 'i')), i,
 865                     env->regwptr[i + x * 8]);
 866         fprintf(f, "\n");
 867         for (; i < 8; i++)
 868             fprintf(f, "%%%c%d: 0x%08x\t",
 869                     (x == 0 ? 'o' : x == 1 ? 'l' : 'i'), i,
 870                     env->regwptr[i + x * 8]);
 871         fprintf(f, "\n");
 872     }
 873     fprintf(f, "psr: 0x%08x -> %c%c%c%c wim: 0x%08x\n", env->psr | env->cwp,
 874             GET_FLAG(PSR_ZERO, 'Z'), GET_FLAG(PSR_OVF, 'V'),
 875             GET_FLAG(PSR_NEG, 'N'), GET_FLAG(PSR_CARRY, 'C'),
 876             env->wim);
 877 }
 878
 879 target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
 880 {
 881     return addr;
 882 }
 883
 884 void helper_flush(target_ulong addr)
 885 {
 886     addr &= ~7;
 887     tb_invalidate_page_range(addr, addr + 8);
 888 }