target-unicore32/translate.c

   1 /*
   2  *  UniCore32 translation
   3  *
   4  * Copyright (C) 2010-2012 Guan Xuetao
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation, or (at your option) any
   9  * later version. See the COPYING file in the top-level directory.
  10  */
  11 #include <stdarg.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <inttypes.h>
  16
  17 #include "cpu.h"
  18 #include "disas/disas.h"
  19 #include "tcg-op.h"
  20 #include "qemu/log.h"
  21
  22 #include "helper.h"
  23 #define GEN_HELPER 1
  24 #include "helper.h"
  25
  26 /* internal defines */
  27 typedef struct DisasContext {
  28     target_ulong pc;
  29     int is_jmp;
  30     /* Nonzero if this instruction has been conditionally skipped.  */
  31     int condjmp;
  32     /* The label that will be jumped to when the instruction is skipped.  */
  33     int condlabel;
  34     struct TranslationBlock *tb;
  35     int singlestep_enabled;
  36 #ifndef CONFIG_USER_ONLY
  37     int user;
  38 #endif
  39 } DisasContext;
  40
  41 #ifndef CONFIG_USER_ONLY
  42 #define IS_USER(s)      (s->user)
  43 #else
  44 #define IS_USER(s)      1
  45 #endif
  46
  47 /* These instructions trap after executing, so defer them until after the
  48    conditional executions state has been updated.  */
  49 #define DISAS_SYSCALL 5
  50
  51 static TCGv_ptr cpu_env;
  52 static TCGv_i32 cpu_R[32];
  53
  54 /* FIXME:  These should be removed.  */
  55 static TCGv cpu_F0s, cpu_F1s;
  56 static TCGv_i64 cpu_F0d, cpu_F1d;
  57
  58 #include "exec/gen-icount.h"
  59
  60 static const char *regnames[] = {
  61       "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07",
  62       "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15",
  63       "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
  64       "r24", "r25", "r26", "r27", "r28", "r29", "r30", "pc" };
  65
  66 /* initialize TCG globals.  */
  67 void uc32_translate_init(void)
  68 {
  69     int i;
  70
  71     cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
  72
  73     for (i = 0; i < 32; i++) {
  74         cpu_R[i] = tcg_global_mem_new_i32(TCG_AREG0,
  75                                 offsetof(CPUUniCore32State, regs[i]), regnames[i]);
  76     }
  77
  78 #define GEN_HELPER 2
  79 #include "helper.h"
  80 }
  81
  82 static int num_temps;
  83
  84 /* Allocate a temporary variable.  */
  85 static TCGv_i32 new_tmp(void)
  86 {
  87     num_temps++;
  88     return tcg_temp_new_i32();
  89 }
  90
  91 /* Release a temporary variable.  */
  92 static void dead_tmp(TCGv tmp)
  93 {
  94     tcg_temp_free(tmp);
  95     num_temps--;
  96 }
  97
  98 static inline TCGv load_cpu_offset(int offset)
  99 {
 100     TCGv tmp = new_tmp();
 101     tcg_gen_ld_i32(tmp, cpu_env, offset);
 102     return tmp;
 103 }
 104
 105 #define load_cpu_field(name) load_cpu_offset(offsetof(CPUUniCore32State, name))
 106
 107 static inline void store_cpu_offset(TCGv var, int offset)
 108 {
 109     tcg_gen_st_i32(var, cpu_env, offset);
 110     dead_tmp(var);
 111 }
 112
 113 #define store_cpu_field(var, name) \
 114     store_cpu_offset(var, offsetof(CPUUniCore32State, name))
 115
 116 /* Set a variable to the value of a CPU register.  */
 117 static void load_reg_var(DisasContext *s, TCGv var, int reg)
 118 {
 119     if (reg == 31) {
 120         uint32_t addr;
 121         /* normaly, since we updated PC */
 122         addr = (long)s->pc;
 123         tcg_gen_movi_i32(var, addr);
 124     } else {
 125         tcg_gen_mov_i32(var, cpu_R[reg]);
 126     }
 127 }
 128
 129 /* Create a new temporary and set it to the value of a CPU register.  */
 130 static inline TCGv load_reg(DisasContext *s, int reg)
 131 {
 132     TCGv tmp = new_tmp();
 133     load_reg_var(s, tmp, reg);
 134     return tmp;
 135 }
 136
 137 /* Set a CPU register.  The source must be a temporary and will be
 138    marked as dead.  */
 139 static void store_reg(DisasContext *s, int reg, TCGv var)
 140 {
 141     if (reg == 31) {
 142         tcg_gen_andi_i32(var, var, ~3);
 143         s->is_jmp = DISAS_JUMP;
 144     }
 145     tcg_gen_mov_i32(cpu_R[reg], var);
 146     dead_tmp(var);
 147 }
 148
 149 /* Value extensions.  */
 150 #define gen_uxtb(var)           tcg_gen_ext8u_i32(var, var)
 151 #define gen_uxth(var)           tcg_gen_ext16u_i32(var, var)
 152 #define gen_sxtb(var)           tcg_gen_ext8s_i32(var, var)
 153 #define gen_sxth(var)           tcg_gen_ext16s_i32(var, var)
 154
 155 #define UCOP_REG_M              (((insn) >>  0) & 0x1f)
 156 #define UCOP_REG_N              (((insn) >> 19) & 0x1f)
 157 #define UCOP_REG_D              (((insn) >> 14) & 0x1f)
 158 #define UCOP_REG_S              (((insn) >>  9) & 0x1f)
 159 #define UCOP_REG_LO             (((insn) >> 14) & 0x1f)
 160 #define UCOP_REG_HI             (((insn) >>  9) & 0x1f)
 161 #define UCOP_SH_OP              (((insn) >>  6) & 0x03)
 162 #define UCOP_SH_IM              (((insn) >>  9) & 0x1f)
 163 #define UCOP_OPCODES            (((insn) >> 25) & 0x0f)
 164 #define UCOP_IMM_9              (((insn) >>  0) & 0x1ff)
 165 #define UCOP_IMM10              (((insn) >>  0) & 0x3ff)
 166 #define UCOP_IMM14              (((insn) >>  0) & 0x3fff)
 167 #define UCOP_COND               (((insn) >> 25) & 0x0f)
 168 #define UCOP_CMOV_COND          (((insn) >> 19) & 0x0f)
 169 #define UCOP_CPNUM              (((insn) >> 10) & 0x0f)
 170 #define UCOP_UCF64_FMT          (((insn) >> 24) & 0x03)
 171 #define UCOP_UCF64_FUNC         (((insn) >>  6) & 0x0f)
 172 #define UCOP_UCF64_COND         (((insn) >>  6) & 0x0f)
 173
 174 #define UCOP_SET(i)             ((insn) & (1 << (i)))
 175 #define UCOP_SET_P              UCOP_SET(28)
 176 #define UCOP_SET_U              UCOP_SET(27)
 177 #define UCOP_SET_B              UCOP_SET(26)
 178 #define UCOP_SET_W              UCOP_SET(25)
 179 #define UCOP_SET_L              UCOP_SET(24)
 180 #define UCOP_SET_S              UCOP_SET(24)
 181
 182 #define ILLEGAL         cpu_abort(env,                                  \
 183                         "Illegal UniCore32 instruction %x at line %d!", \
 184                         insn, __LINE__)
 185
 186 #ifndef CONFIG_USER_ONLY
 187 static void disas_cp0_insn(CPUUniCore32State *env, DisasContext *s,
 188         uint32_t insn)
 189 {
 190     TCGv tmp, tmp2, tmp3;
 191     if ((insn & 0xfe000000) == 0xe0000000) {
 192         tmp2 = new_tmp();
 193         tmp3 = new_tmp();
 194         tcg_gen_movi_i32(tmp2, UCOP_REG_N);
 195         tcg_gen_movi_i32(tmp3, UCOP_IMM10);
 196         if (UCOP_SET_L) {
 197             tmp = new_tmp();
 198             gen_helper_cp0_get(tmp, cpu_env, tmp2, tmp3);
 199             store_reg(s, UCOP_REG_D, tmp);
 200         } else {
 201             tmp = load_reg(s, UCOP_REG_D);
 202             gen_helper_cp0_set(cpu_env, tmp, tmp2, tmp3);
 203             dead_tmp(tmp);
 204         }
 205         dead_tmp(tmp2);
 206         dead_tmp(tmp3);
 207         return;
 208     }
 209     ILLEGAL;
 210 }
 211
 212 static void disas_ocd_insn(CPUUniCore32State *env, DisasContext *s,
 213         uint32_t insn)
 214 {
 215     TCGv tmp;
 216
 217     if ((insn & 0xff003fff) == 0xe1000400) {
 218         /*
 219          * movc rd, pp.nn, #imm9
 220          *      rd: UCOP_REG_D
 221          *      nn: UCOP_REG_N (must be 0)
 222          *      imm9: 0
 223          */
 224         if (UCOP_REG_N == 0) {
 225             tmp = new_tmp();
 226             tcg_gen_movi_i32(tmp, 0);
 227             store_reg(s, UCOP_REG_D, tmp);
 228             return;
 229         } else {
 230             ILLEGAL;
 231         }
 232     }
 233     if ((insn & 0xff003fff) == 0xe0000401) {
 234         /*
 235          * movc pp.nn, rn, #imm9
 236          *      rn: UCOP_REG_D
 237          *      nn: UCOP_REG_N (must be 1)
 238          *      imm9: 1
 239          */
 240         if (UCOP_REG_N == 1) {
 241             tmp = load_reg(s, UCOP_REG_D);
 242             gen_helper_cp1_putc(tmp);
 243             dead_tmp(tmp);
 244             return;
 245         } else {
 246             ILLEGAL;
 247         }
 248     }
 249     ILLEGAL;
 250 }
 251 #endif
 252
 253 static inline void gen_set_asr(TCGv var, uint32_t mask)
 254 {
 255     TCGv tmp_mask = tcg_const_i32(mask);
 256     gen_helper_asr_write(cpu_env, var, tmp_mask);
 257     tcg_temp_free_i32(tmp_mask);
 258 }
 259 /* Set NZCV flags from the high 4 bits of var.  */
 260 #define gen_set_nzcv(var) gen_set_asr(var, ASR_NZCV)
 261
 262 static void gen_exception(int excp)
 263 {
 264     TCGv tmp = new_tmp();
 265     tcg_gen_movi_i32(tmp, excp);
 266     gen_helper_exception(cpu_env, tmp);
 267     dead_tmp(tmp);
 268 }
 269
 270 #define gen_set_CF(var) tcg_gen_st_i32(var, cpu_env, offsetof(CPUUniCore32State, CF))
 271
 272 /* Set CF to the top bit of var.  */
 273 static void gen_set_CF_bit31(TCGv var)
 274 {
 275     TCGv tmp = new_tmp();
 276     tcg_gen_shri_i32(tmp, var, 31);
 277     gen_set_CF(tmp);
 278     dead_tmp(tmp);
 279 }
 280
 281 /* Set N and Z flags from var.  */
 282 static inline void gen_logic_CC(TCGv var)
 283 {
 284     tcg_gen_st_i32(var, cpu_env, offsetof(CPUUniCore32State, NF));
 285     tcg_gen_st_i32(var, cpu_env, offsetof(CPUUniCore32State, ZF));
 286 }
 287
 288 /* dest = T0 + T1 + CF. */
 289 static void gen_add_carry(TCGv dest, TCGv t0, TCGv t1)
 290 {
 291     TCGv tmp;
 292     tcg_gen_add_i32(dest, t0, t1);
 293     tmp = load_cpu_field(CF);
 294     tcg_gen_add_i32(dest, dest, tmp);
 295     dead_tmp(tmp);
 296 }
 297
 298 /* dest = T0 - T1 + CF - 1.  */
 299 static void gen_sub_carry(TCGv dest, TCGv t0, TCGv t1)
 300 {
 301     TCGv tmp;
 302     tcg_gen_sub_i32(dest, t0, t1);
 303     tmp = load_cpu_field(CF);
 304     tcg_gen_add_i32(dest, dest, tmp);
 305     tcg_gen_subi_i32(dest, dest, 1);
 306     dead_tmp(tmp);
 307 }
 308
 309 static void shifter_out_im(TCGv var, int shift)
 310 {
 311     TCGv tmp = new_tmp();
 312     if (shift == 0) {
 313         tcg_gen_andi_i32(tmp, var, 1);
 314     } else {
 315         tcg_gen_shri_i32(tmp, var, shift);
 316         if (shift != 31) {
 317             tcg_gen_andi_i32(tmp, tmp, 1);
 318         }
 319     }
 320     gen_set_CF(tmp);
 321     dead_tmp(tmp);
 322 }
 323
 324 /* Shift by immediate.  Includes special handling for shift == 0.  */
 325 static inline void gen_uc32_shift_im(TCGv var, int shiftop, int shift,
 326         int flags)
 327 {
 328     switch (shiftop) {
 329     case 0: /* LSL */
 330         if (shift != 0) {
 331             if (flags) {
 332                 shifter_out_im(var, 32 - shift);
 333             }
 334             tcg_gen_shli_i32(var, var, shift);
 335         }
 336         break;
 337     case 1: /* LSR */
 338         if (shift == 0) {
 339             if (flags) {
 340                 tcg_gen_shri_i32(var, var, 31);
 341                 gen_set_CF(var);
 342             }
 343             tcg_gen_movi_i32(var, 0);
 344         } else {
 345             if (flags) {
 346                 shifter_out_im(var, shift - 1);
 347             }
 348             tcg_gen_shri_i32(var, var, shift);
 349         }
 350         break;
 351     case 2: /* ASR */
 352         if (shift == 0) {
 353             shift = 32;
 354         }
 355         if (flags) {
 356             shifter_out_im(var, shift - 1);
 357         }
 358         if (shift == 32) {
 359             shift = 31;
 360         }
 361         tcg_gen_sari_i32(var, var, shift);
 362         break;
 363     case 3: /* ROR/RRX */
 364         if (shift != 0) {
 365             if (flags) {
 366                 shifter_out_im(var, shift - 1);
 367             }
 368             tcg_gen_rotri_i32(var, var, shift); break;
 369         } else {
 370             TCGv tmp = load_cpu_field(CF);
 371             if (flags) {
 372                 shifter_out_im(var, 0);
 373             }
 374             tcg_gen_shri_i32(var, var, 1);
 375             tcg_gen_shli_i32(tmp, tmp, 31);
 376             tcg_gen_or_i32(var, var, tmp);
 377             dead_tmp(tmp);
 378         }
 379     }
 380 };
 381
 382 static inline void gen_uc32_shift_reg(TCGv var, int shiftop,
 383                                      TCGv shift, int flags)
 384 {
 385     if (flags) {
 386         switch (shiftop) {
 387         case 0:
 388             gen_helper_shl_cc(var, cpu_env, var, shift);
 389             break;
 390         case 1:
 391             gen_helper_shr_cc(var, cpu_env, var, shift);
 392             break;
 393         case 2:
 394             gen_helper_sar_cc(var, cpu_env, var, shift);
 395             break;
 396         case 3:
 397             gen_helper_ror_cc(var, cpu_env, var, shift);
 398             break;
 399         }
 400     } else {
 401         switch (shiftop) {
 402         case 0:
 403             gen_helper_shl(var, var, shift);
 404             break;
 405         case 1:
 406             gen_helper_shr(var, var, shift);
 407             break;
 408         case 2:
 409             gen_helper_sar(var, var, shift);
 410             break;
 411         case 3:
 412             tcg_gen_andi_i32(shift, shift, 0x1f);
 413             tcg_gen_rotr_i32(var, var, shift);
 414             break;
 415         }
 416     }
 417     dead_tmp(shift);
 418 }
 419
 420 static void gen_test_cc(int cc, int label)
 421 {
 422     TCGv tmp;
 423     TCGv tmp2;
 424     int inv;
 425
 426     switch (cc) {
 427     case 0: /* eq: Z */
 428         tmp = load_cpu_field(ZF);
 429         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
 430         break;
 431     case 1: /* ne: !Z */
 432         tmp = load_cpu_field(ZF);
 433         tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, label);
 434         break;
 435     case 2: /* cs: C */
 436         tmp = load_cpu_field(CF);
 437         tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, label);
 438         break;
 439     case 3: /* cc: !C */
 440         tmp = load_cpu_field(CF);
 441         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
 442         break;
 443     case 4: /* mi: N */
 444         tmp = load_cpu_field(NF);
 445         tcg_gen_brcondi_i32(TCG_COND_LT, tmp, 0, label);
 446         break;
 447     case 5: /* pl: !N */
 448         tmp = load_cpu_field(NF);
 449         tcg_gen_brcondi_i32(TCG_COND_GE, tmp, 0, label);
 450         break;
 451     case 6: /* vs: V */
 452         tmp = load_cpu_field(VF);
 453         tcg_gen_brcondi_i32(TCG_COND_LT, tmp, 0, label);
 454         break;
 455     case 7: /* vc: !V */
 456         tmp = load_cpu_field(VF);
 457         tcg_gen_brcondi_i32(TCG_COND_GE, tmp, 0, label);
 458         break;
 459     case 8: /* hi: C && !Z */
 460         inv = gen_new_label();
 461         tmp = load_cpu_field(CF);
 462         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, inv);
 463         dead_tmp(tmp);
 464         tmp = load_cpu_field(ZF);
 465         tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, label);
 466         gen_set_label(inv);
 467         break;
 468     case 9: /* ls: !C || Z */
 469         tmp = load_cpu_field(CF);
 470         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
 471         dead_tmp(tmp);
 472         tmp = load_cpu_field(ZF);
 473         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
 474         break;
 475     case 10: /* ge: N == V -> N ^ V == 0 */
 476         tmp = load_cpu_field(VF);
 477         tmp2 = load_cpu_field(NF);
 478         tcg_gen_xor_i32(tmp, tmp, tmp2);
 479         dead_tmp(tmp2);
 480         tcg_gen_brcondi_i32(TCG_COND_GE, tmp, 0, label);
 481         break;
 482     case 11: /* lt: N != V -> N ^ V != 0 */
 483         tmp = load_cpu_field(VF);
 484         tmp2 = load_cpu_field(NF);
 485         tcg_gen_xor_i32(tmp, tmp, tmp2);
 486         dead_tmp(tmp2);
 487         tcg_gen_brcondi_i32(TCG_COND_LT, tmp, 0, label);
 488         break;
 489     case 12: /* gt: !Z && N == V */
 490         inv = gen_new_label();
 491         tmp = load_cpu_field(ZF);
 492         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, inv);
 493         dead_tmp(tmp);
 494         tmp = load_cpu_field(VF);
 495         tmp2 = load_cpu_field(NF);
 496         tcg_gen_xor_i32(tmp, tmp, tmp2);
 497         dead_tmp(tmp2);
 498         tcg_gen_brcondi_i32(TCG_COND_GE, tmp, 0, label);
 499         gen_set_label(inv);
 500         break;
 501     case 13: /* le: Z || N != V */
 502         tmp = load_cpu_field(ZF);
 503         tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
 504         dead_tmp(tmp);
 505         tmp = load_cpu_field(VF);
 506         tmp2 = load_cpu_field(NF);
 507         tcg_gen_xor_i32(tmp, tmp, tmp2);
 508         dead_tmp(tmp2);
 509         tcg_gen_brcondi_i32(TCG_COND_LT, tmp, 0, label);
 510         break;
 511     default:
 512         fprintf(stderr, "Bad condition code 0x%x\n", cc);
 513         abort();
 514     }
 515     dead_tmp(tmp);
 516 }
 517
 518 static const uint8_t table_logic_cc[16] = {
 519     1, /* and */    1, /* xor */    0, /* sub */    0, /* rsb */
 520     0, /* add */    0, /* adc */    0, /* sbc */    0, /* rsc */
 521     1, /* andl */   1, /* xorl */   0, /* cmp */    0, /* cmn */
 522     1, /* orr */    1, /* mov */    1, /* bic */    1, /* mvn */
 523 };
 524
 525 /* Set PC state from an immediate address.  */
 526 static inline void gen_bx_im(DisasContext *s, uint32_t addr)
 527 {
 528     s->is_jmp = DISAS_UPDATE;
 529     tcg_gen_movi_i32(cpu_R[31], addr & ~3);
 530 }
 531
 532 /* Set PC state from var.  var is marked as dead.  */
 533 static inline void gen_bx(DisasContext *s, TCGv var)
 534 {
 535     s->is_jmp = DISAS_UPDATE;
 536     tcg_gen_andi_i32(cpu_R[31], var, ~3);
 537     dead_tmp(var);
 538 }
 539
 540 static inline void store_reg_bx(DisasContext *s, int reg, TCGv var)
 541 {
 542     store_reg(s, reg, var);
 543 }
 544
 545 static inline TCGv gen_ld8s(TCGv addr, int index)
 546 {
 547     TCGv tmp = new_tmp();
 548     tcg_gen_qemu_ld8s(tmp, addr, index);
 549     return tmp;
 550 }
 551
 552 static inline TCGv gen_ld8u(TCGv addr, int index)
 553 {
 554     TCGv tmp = new_tmp();
 555     tcg_gen_qemu_ld8u(tmp, addr, index);
 556     return tmp;
 557 }
 558
 559 static inline TCGv gen_ld16s(TCGv addr, int index)
 560 {
 561     TCGv tmp = new_tmp();
 562     tcg_gen_qemu_ld16s(tmp, addr, index);
 563     return tmp;
 564 }
 565
 566 static inline TCGv gen_ld16u(TCGv addr, int index)
 567 {
 568     TCGv tmp = new_tmp();
 569     tcg_gen_qemu_ld16u(tmp, addr, index);
 570     return tmp;
 571 }
 572
 573 static inline TCGv gen_ld32(TCGv addr, int index)
 574 {
 575     TCGv tmp = new_tmp();
 576     tcg_gen_qemu_ld32u(tmp, addr, index);
 577     return tmp;
 578 }
 579
 580 static inline TCGv_i64 gen_ld64(TCGv addr, int index)
 581 {
 582     TCGv_i64 tmp = tcg_temp_new_i64();
 583     tcg_gen_qemu_ld64(tmp, addr, index);
 584     return tmp;
 585 }
 586
 587 static inline void gen_st8(TCGv val, TCGv addr, int index)
 588 {
 589     tcg_gen_qemu_st8(val, addr, index);
 590     dead_tmp(val);
 591 }
 592
 593 static inline void gen_st16(TCGv val, TCGv addr, int index)
 594 {
 595     tcg_gen_qemu_st16(val, addr, index);
 596     dead_tmp(val);
 597 }
 598
 599 static inline void gen_st32(TCGv val, TCGv addr, int index)
 600 {
 601     tcg_gen_qemu_st32(val, addr, index);
 602     dead_tmp(val);
 603 }
 604
 605 static inline void gen_st64(TCGv_i64 val, TCGv addr, int index)
 606 {
 607     tcg_gen_qemu_st64(val, addr, index);
 608     tcg_temp_free_i64(val);
 609 }
 610
 611 static inline void gen_set_pc_im(uint32_t val)
 612 {
 613     tcg_gen_movi_i32(cpu_R[31], val);
 614 }
 615
 616 /* Force a TB lookup after an instruction that changes the CPU state.  */
 617 static inline void gen_lookup_tb(DisasContext *s)
 618 {
 619     tcg_gen_movi_i32(cpu_R[31], s->pc & ~1);
 620     s->is_jmp = DISAS_UPDATE;
 621 }
 622
 623 static inline void gen_add_data_offset(DisasContext *s, unsigned int insn,
 624         TCGv var)
 625 {
 626     int val;
 627     TCGv offset;
 628
 629     if (UCOP_SET(29)) {
 630         /* immediate */
 631         val = UCOP_IMM14;
 632         if (!UCOP_SET_U) {
 633             val = -val;
 634         }
 635         if (val != 0) {
 636             tcg_gen_addi_i32(var, var, val);
 637         }
 638     } else {
 639         /* shift/register */
 640         offset = load_reg(s, UCOP_REG_M);
 641         gen_uc32_shift_im(offset, UCOP_SH_OP, UCOP_SH_IM, 0);
 642         if (!UCOP_SET_U) {
 643             tcg_gen_sub_i32(var, var, offset);
 644         } else {
 645             tcg_gen_add_i32(var, var, offset);
 646         }
 647         dead_tmp(offset);
 648     }
 649 }
 650
 651 static inline void gen_add_datah_offset(DisasContext *s, unsigned int insn,
 652         TCGv var)
 653 {
 654     int val;
 655     TCGv offset;
 656
 657     if (UCOP_SET(26)) {
 658         /* immediate */
 659         val = (insn & 0x1f) | ((insn >> 4) & 0x3e0);
 660         if (!UCOP_SET_U) {
 661             val = -val;
 662         }
 663         if (val != 0) {
 664             tcg_gen_addi_i32(var, var, val);
 665         }
 666     } else {
 667         /* register */
 668         offset = load_reg(s, UCOP_REG_M);
 669         if (!UCOP_SET_U) {
 670             tcg_gen_sub_i32(var, var, offset);
 671         } else {
 672             tcg_gen_add_i32(var, var, offset);
 673         }
 674         dead_tmp(offset);
 675     }
 676 }
 677
 678 static inline long ucf64_reg_offset(int reg)
 679 {
 680     if (reg & 1) {
 681         return offsetof(CPUUniCore32State, ucf64.regs[reg >> 1])
 682           + offsetof(CPU_DoubleU, l.upper);
 683     } else {
 684         return offsetof(CPUUniCore32State, ucf64.regs[reg >> 1])
 685           + offsetof(CPU_DoubleU, l.lower);
 686     }
 687 }
 688
 689 #define ucf64_gen_ld32(reg)      load_cpu_offset(ucf64_reg_offset(reg))
 690 #define ucf64_gen_st32(var, reg) store_cpu_offset(var, ucf64_reg_offset(reg))
 691
 692 /* UniCore-F64 single load/store I_offset */
 693 static void do_ucf64_ldst_i(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
 694 {
 695     int offset;
 696     TCGv tmp;
 697     TCGv addr;
 698
 699     addr = load_reg(s, UCOP_REG_N);
 700     if (!UCOP_SET_P && !UCOP_SET_W) {
 701         ILLEGAL;
 702     }
 703
 704     if (UCOP_SET_P) {
 705         offset = UCOP_IMM10 << 2;
 706         if (!UCOP_SET_U) {
 707             offset = -offset;
 708         }
 709         if (offset != 0) {
 710             tcg_gen_addi_i32(addr, addr, offset);
 711         }
 712     }
 713
 714     if (UCOP_SET_L) { /* load */
 715         tmp = gen_ld32(addr, IS_USER(s));
 716         ucf64_gen_st32(tmp, UCOP_REG_D);
 717     } else { /* store */
 718         tmp = ucf64_gen_ld32(UCOP_REG_D);
 719         gen_st32(tmp, addr, IS_USER(s));
 720     }
 721
 722     if (!UCOP_SET_P) {
 723         offset = UCOP_IMM10 << 2;
 724         if (!UCOP_SET_U) {
 725             offset = -offset;
 726         }
 727         if (offset != 0) {
 728             tcg_gen_addi_i32(addr, addr, offset);
 729         }
 730     }
 731     if (UCOP_SET_W) {
 732         store_reg(s, UCOP_REG_N, addr);
 733     } else {
 734         dead_tmp(addr);
 735     }
 736 }
 737
 738 /* UniCore-F64 load/store multiple words */
 739 static void do_ucf64_ldst_m(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
 740 {
 741     unsigned int i;
 742     int j, n, freg;
 743     TCGv tmp;
 744     TCGv addr;
 745
 746     if (UCOP_REG_D != 0) {
 747         ILLEGAL;
 748     }
 749     if (UCOP_REG_N == 31) {
 750         ILLEGAL;
 751     }
 752     if ((insn << 24) == 0) {
 753         ILLEGAL;
 754     }
 755
 756     addr = load_reg(s, UCOP_REG_N);
 757
 758     n = 0;
 759     for (i = 0; i < 8; i++) {
 760         if (UCOP_SET(i)) {
 761             n++;
 762         }
 763     }
 764
 765     if (UCOP_SET_U) {
 766         if (UCOP_SET_P) { /* pre increment */
 767             tcg_gen_addi_i32(addr, addr, 4);
 768         } /* unnecessary to do anything when post increment */
 769     } else {
 770         if (UCOP_SET_P) { /* pre decrement */
 771             tcg_gen_addi_i32(addr, addr, -(n * 4));
 772         } else { /* post decrement */
 773             if (n != 1) {
 774                 tcg_gen_addi_i32(addr, addr, -((n - 1) * 4));
 775             }
 776         }
 777     }
 778
 779     freg = ((insn >> 8) & 3) << 3; /* freg should be 0, 8, 16, 24 */
 780
 781     for (i = 0, j = 0; i < 8; i++, freg++) {
 782         if (!UCOP_SET(i)) {
 783             continue;
 784         }
 785
 786         if (UCOP_SET_L) { /* load */
 787             tmp = gen_ld32(addr, IS_USER(s));
 788             ucf64_gen_st32(tmp, freg);
 789         } else { /* store */
 790             tmp = ucf64_gen_ld32(freg);
 791             gen_st32(tmp, addr, IS_USER(s));
 792         }
 793
 794         j++;
 795         /* unnecessary to add after the last transfer */
 796         if (j != n) {
 797             tcg_gen_addi_i32(addr, addr, 4);
 798         }
 799     }
 800
 801     if (UCOP_SET_W) { /* write back */
 802         if (UCOP_SET_U) {
 803             if (!UCOP_SET_P) { /* post increment */
 804                 tcg_gen_addi_i32(addr, addr, 4);
 805             } /* unnecessary to do anything when pre increment */
 806         } else {
 807             if (UCOP_SET_P) {
 808                 /* pre decrement */
 809                 if (n != 1) {
 810                     tcg_gen_addi_i32(addr, addr, -((n - 1) * 4));
 811                 }
 812             } else {
 813                 /* post decrement */
 814                 tcg_gen_addi_i32(addr, addr, -(n * 4));
 815             }
 816         }
 817         store_reg(s, UCOP_REG_N, addr);
 818     } else {
 819         dead_tmp(addr);
 820     }
 821 }
 822
 823 /* UniCore-F64 mrc/mcr */
 824 static void do_ucf64_trans(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
 825 {
 826     TCGv tmp;
 827
 828     if ((insn & 0xfe0003ff) == 0xe2000000) {
 829         /* control register */
 830         if ((UCOP_REG_N != UC32_UCF64_FPSCR) || (UCOP_REG_D == 31)) {
 831             ILLEGAL;
 832         }
 833         if (UCOP_SET(24)) {
 834             /* CFF */
 835             tmp = new_tmp();
 836             gen_helper_ucf64_get_fpscr(tmp, cpu_env);
 837             store_reg(s, UCOP_REG_D, tmp);
 838         } else {
 839             /* CTF */
 840             tmp = load_reg(s, UCOP_REG_D);
 841             gen_helper_ucf64_set_fpscr(cpu_env, tmp);
 842             dead_tmp(tmp);
 843             gen_lookup_tb(s);
 844         }
 845         return;
 846     }
 847     if ((insn & 0xfe0003ff) == 0xe0000000) {
 848         /* general register */
 849         if (UCOP_REG_D == 31) {
 850             ILLEGAL;
 851         }
 852         if (UCOP_SET(24)) { /* MFF */
 853             tmp = ucf64_gen_ld32(UCOP_REG_N);
 854             store_reg(s, UCOP_REG_D, tmp);
 855         } else { /* MTF */
 856             tmp = load_reg(s, UCOP_REG_D);
 857             ucf64_gen_st32(tmp, UCOP_REG_N);
 858         }
 859         return;
 860     }
 861     if ((insn & 0xfb000000) == 0xe9000000) {
 862         /* MFFC */
 863         if (UCOP_REG_D != 31) {
 864             ILLEGAL;
 865         }
 866         if (UCOP_UCF64_COND & 0x8) {
 867             ILLEGAL;
 868         }
 869
 870         tmp = new_tmp();
 871         tcg_gen_movi_i32(tmp, UCOP_UCF64_COND);
 872         if (UCOP_SET(26)) {
 873             tcg_gen_ld_i64(cpu_F0d, cpu_env, ucf64_reg_offset(UCOP_REG_N));
 874             tcg_gen_ld_i64(cpu_F1d, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 875             gen_helper_ucf64_cmpd(cpu_F0d, cpu_F1d, tmp, cpu_env);
 876         } else {
 877             tcg_gen_ld_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_N));
 878             tcg_gen_ld_i32(cpu_F1s, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 879             gen_helper_ucf64_cmps(cpu_F0s, cpu_F1s, tmp, cpu_env);
 880         }
 881         dead_tmp(tmp);
 882         return;
 883     }
 884     ILLEGAL;
 885 }
 886
 887 /* UniCore-F64 convert instructions */
 888 static void do_ucf64_fcvt(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
 889 {
 890     if (UCOP_UCF64_FMT == 3) {
 891         ILLEGAL;
 892     }
 893     if (UCOP_REG_N != 0) {
 894         ILLEGAL;
 895     }
 896     switch (UCOP_UCF64_FUNC) {
 897     case 0: /* cvt.s */
 898         switch (UCOP_UCF64_FMT) {
 899         case 1 /* d */:
 900             tcg_gen_ld_i64(cpu_F0d, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 901             gen_helper_ucf64_df2sf(cpu_F0s, cpu_F0d, cpu_env);
 902             tcg_gen_st_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_D));
 903             break;
 904         case 2 /* w */:
 905             tcg_gen_ld_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 906             gen_helper_ucf64_si2sf(cpu_F0s, cpu_F0s, cpu_env);
 907             tcg_gen_st_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_D));
 908             break;
 909         default /* s */:
 910             ILLEGAL;
 911             break;
 912         }
 913         break;
 914     case 1: /* cvt.d */
 915         switch (UCOP_UCF64_FMT) {
 916         case 0 /* s */:
 917             tcg_gen_ld_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 918             gen_helper_ucf64_sf2df(cpu_F0d, cpu_F0s, cpu_env);
 919             tcg_gen_st_i64(cpu_F0d, cpu_env, ucf64_reg_offset(UCOP_REG_D));
 920             break;
 921         case 2 /* w */:
 922             tcg_gen_ld_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 923             gen_helper_ucf64_si2df(cpu_F0d, cpu_F0s, cpu_env);
 924             tcg_gen_st_i64(cpu_F0d, cpu_env, ucf64_reg_offset(UCOP_REG_D));
 925             break;
 926         default /* d */:
 927             ILLEGAL;
 928             break;
 929         }
 930         break;
 931     case 4: /* cvt.w */
 932         switch (UCOP_UCF64_FMT) {
 933         case 0 /* s */:
 934             tcg_gen_ld_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 935             gen_helper_ucf64_sf2si(cpu_F0s, cpu_F0s, cpu_env);
 936             tcg_gen_st_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_D));
 937             break;
 938         case 1 /* d */:
 939             tcg_gen_ld_i64(cpu_F0d, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 940             gen_helper_ucf64_df2si(cpu_F0s, cpu_F0d, cpu_env);
 941             tcg_gen_st_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_D));
 942             break;
 943     default /* w */:
 944             ILLEGAL;
 945             break;
 946         }
 947         break;
 948     default:
 949         ILLEGAL;
 950     }
 951 }
 952
 953 /* UniCore-F64 compare instructions */
 954 static void do_ucf64_fcmp(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
 955 {
 956     if (UCOP_SET(25)) {
 957         ILLEGAL;
 958     }
 959     if (UCOP_REG_D != 0) {
 960         ILLEGAL;
 961     }
 962
 963     ILLEGAL; /* TODO */
 964     if (UCOP_SET(24)) {
 965         tcg_gen_ld_i64(cpu_F0d, cpu_env, ucf64_reg_offset(UCOP_REG_N));
 966         tcg_gen_ld_i64(cpu_F1d, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 967         /* gen_helper_ucf64_cmpd(cpu_F0d, cpu_F1d, cpu_env); */
 968     } else {
 969         tcg_gen_ld_i32(cpu_F0s, cpu_env, ucf64_reg_offset(UCOP_REG_N));
 970         tcg_gen_ld_i32(cpu_F1s, cpu_env, ucf64_reg_offset(UCOP_REG_M));
 971         /* gen_helper_ucf64_cmps(cpu_F0s, cpu_F1s, cpu_env); */
 972     }
 973 }
 974
 975 #define gen_helper_ucf64_movs(x, y)      do { } while (0)
 976 #define gen_helper_ucf64_movd(x, y)      do { } while (0)
 977
 978 #define UCF64_OP1(name)    do {                           \
 979         if (UCOP_REG_N != 0) {                            \
 980             ILLEGAL;                                      \
 981         }                                                 \
 982         switch (UCOP_UCF64_FMT) {                         \
 983         case 0 /* s */:                                   \
 984             tcg_gen_ld_i32(cpu_F0s, cpu_env,              \
 985                            ucf64_reg_offset(UCOP_REG_M)); \
 986             gen_helper_ucf64_##name##s(cpu_F0s, cpu_F0s); \
 987             tcg_gen_st_i32(cpu_F0s, cpu_env,              \
 988                            ucf64_reg_offset(UCOP_REG_D)); \
 989             break;                                        \
 990         case 1 /* d */:                                   \
 991             tcg_gen_ld_i64(cpu_F0d, cpu_env,              \
 992                            ucf64_reg_offset(UCOP_REG_M)); \
 993             gen_helper_ucf64_##name##d(cpu_F0d, cpu_F0d); \
 994             tcg_gen_st_i64(cpu_F0d, cpu_env,              \
 995                            ucf64_reg_offset(UCOP_REG_D)); \
 996             break;                                        \
 997         case 2 /* w */:                                   \
 998             ILLEGAL;                                      \
 999             break;                                        \
1000         }                                                 \
1001     } while (0)
1002
1003 #define UCF64_OP2(name)    do {                           \
1004         switch (UCOP_UCF64_FMT) {                         \
1005         case 0 /* s */:                                   \
1006             tcg_gen_ld_i32(cpu_F0s, cpu_env,              \
1007                            ucf64_reg_offset(UCOP_REG_N)); \
1008             tcg_gen_ld_i32(cpu_F1s, cpu_env,              \
1009                            ucf64_reg_offset(UCOP_REG_M)); \
1010             gen_helper_ucf64_##name##s(cpu_F0s,           \
1011                            cpu_F0s, cpu_F1s, cpu_env);    \
1012             tcg_gen_st_i32(cpu_F0s, cpu_env,              \
1013                            ucf64_reg_offset(UCOP_REG_D)); \
1014             break;                                        \
1015         case 1 /* d */:                                   \
1016             tcg_gen_ld_i64(cpu_F0d, cpu_env,              \
1017                            ucf64_reg_offset(UCOP_REG_N)); \
1018             tcg_gen_ld_i64(cpu_F1d, cpu_env,              \
1019                            ucf64_reg_offset(UCOP_REG_M)); \
1020             gen_helper_ucf64_##name##d(cpu_F0d,           \
1021                            cpu_F0d, cpu_F1d, cpu_env);    \
1022             tcg_gen_st_i64(cpu_F0d, cpu_env,              \
1023                            ucf64_reg_offset(UCOP_REG_D)); \
1024             break;                                        \
1025         case 2 /* w */:                                   \
1026             ILLEGAL;                                      \
1027             break;                                        \
1028         }                                                 \
1029     } while (0)
1030
1031 /* UniCore-F64 data processing */
1032 static void do_ucf64_datap(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1033 {
1034     if (UCOP_UCF64_FMT == 3) {
1035         ILLEGAL;
1036     }
1037     switch (UCOP_UCF64_FUNC) {
1038     case 0: /* add */
1039         UCF64_OP2(add);
1040         break;
1041     case 1: /* sub */
1042         UCF64_OP2(sub);
1043         break;
1044     case 2: /* mul */
1045         UCF64_OP2(mul);
1046         break;
1047     case 4: /* div */
1048         UCF64_OP2(div);
1049         break;
1050     case 5: /* abs */
1051         UCF64_OP1(abs);
1052         break;
1053     case 6: /* mov */
1054         UCF64_OP1(mov);
1055         break;
1056     case 7: /* neg */
1057         UCF64_OP1(neg);
1058         break;
1059     default:
1060         ILLEGAL;
1061     }
1062 }
1063
1064 /* Disassemble an F64 instruction */
1065 static void disas_ucf64_insn(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1066 {
1067     if (!UCOP_SET(29)) {
1068         if (UCOP_SET(26)) {
1069             do_ucf64_ldst_m(env, s, insn);
1070         } else {
1071             do_ucf64_ldst_i(env, s, insn);
1072         }
1073     } else {
1074         if (UCOP_SET(5)) {
1075             switch ((insn >> 26) & 0x3) {
1076             case 0:
1077                 do_ucf64_datap(env, s, insn);
1078                 break;
1079             case 1:
1080                 ILLEGAL;
1081                 break;
1082             case 2:
1083                 do_ucf64_fcvt(env, s, insn);
1084                 break;
1085             case 3:
1086                 do_ucf64_fcmp(env, s, insn);
1087                 break;
1088             }
1089         } else {
1090             do_ucf64_trans(env, s, insn);
1091         }
1092     }
1093 }
1094
1095 static inline void gen_goto_tb(DisasContext *s, int n, uint32_t dest)
1096 {
1097     TranslationBlock *tb;
1098
1099     tb = s->tb;
1100     if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
1101         tcg_gen_goto_tb(n);
1102         gen_set_pc_im(dest);
1103         tcg_gen_exit_tb((uintptr_t)tb + n);
1104     } else {
1105         gen_set_pc_im(dest);
1106         tcg_gen_exit_tb(0);
1107     }
1108 }
1109
1110 static inline void gen_jmp(DisasContext *s, uint32_t dest)
1111 {
1112     if (unlikely(s->singlestep_enabled)) {
1113         /* An indirect jump so that we still trigger the debug exception.  */
1114         gen_bx_im(s, dest);
1115     } else {
1116         gen_goto_tb(s, 0, dest);
1117         s->is_jmp = DISAS_TB_JUMP;
1118     }
1119 }
1120
1121 static inline void gen_mulxy(TCGv t0, TCGv t1, int x, int y)
1122 {
1123     if (x) {
1124         tcg_gen_sari_i32(t0, t0, 16);
1125     } else {
1126         gen_sxth(t0);
1127     }
1128     if (y) {
1129         tcg_gen_sari_i32(t1, t1, 16);
1130     } else {
1131         gen_sxth(t1);
1132     }
1133     tcg_gen_mul_i32(t0, t0, t1);
1134 }
1135
1136 /* Returns nonzero if access to the PSR is not permitted. Marks t0 as dead. */
1137 static int gen_set_psr(DisasContext *s, uint32_t mask, int bsr, TCGv t0)
1138 {
1139     TCGv tmp;
1140     if (bsr) {
1141         /* ??? This is also undefined in system mode.  */
1142         if (IS_USER(s)) {
1143             return 1;
1144         }
1145
1146         tmp = load_cpu_field(bsr);
1147         tcg_gen_andi_i32(tmp, tmp, ~mask);
1148         tcg_gen_andi_i32(t0, t0, mask);
1149         tcg_gen_or_i32(tmp, tmp, t0);
1150         store_cpu_field(tmp, bsr);
1151     } else {
1152         gen_set_asr(t0, mask);
1153     }
1154     dead_tmp(t0);
1155     gen_lookup_tb(s);
1156     return 0;
1157 }
1158
1159 /* Generate an old-style exception return. Marks pc as dead. */
1160 static void gen_exception_return(DisasContext *s, TCGv pc)
1161 {
1162     TCGv tmp;
1163     store_reg(s, 31, pc);
1164     tmp = load_cpu_field(bsr);
1165     gen_set_asr(tmp, 0xffffffff);
1166     dead_tmp(tmp);
1167     s->is_jmp = DISAS_UPDATE;
1168 }
1169
1170 static void disas_coproc_insn(CPUUniCore32State *env, DisasContext *s,
1171         uint32_t insn)
1172 {
1173     switch (UCOP_CPNUM) {
1174 #ifndef CONFIG_USER_ONLY
1175     case 0:
1176         disas_cp0_insn(env, s, insn);
1177         break;
1178     case 1:
1179         disas_ocd_insn(env, s, insn);
1180         break;
1181 #endif
1182     case 2:
1183         disas_ucf64_insn(env, s, insn);
1184         break;
1185     default:
1186         /* Unknown coprocessor. */
1187         cpu_abort(env, "Unknown coprocessor!");
1188     }
1189 }
1190
1191 /* data processing instructions */
1192 static void do_datap(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1193 {
1194     TCGv tmp;
1195     TCGv tmp2;
1196     int logic_cc;
1197
1198     if (UCOP_OPCODES == 0x0f || UCOP_OPCODES == 0x0d) {
1199         if (UCOP_SET(23)) { /* CMOV instructions */
1200             if ((UCOP_CMOV_COND == 0xe) || (UCOP_CMOV_COND == 0xf)) {
1201                 ILLEGAL;
1202             }
1203             /* if not always execute, we generate a conditional jump to
1204                next instruction */
1205             s->condlabel = gen_new_label();
1206             gen_test_cc(UCOP_CMOV_COND ^ 1, s->condlabel);
1207             s->condjmp = 1;
1208         }
1209     }
1210
1211     logic_cc = table_logic_cc[UCOP_OPCODES] & (UCOP_SET_S >> 24);
1212
1213     if (UCOP_SET(29)) {
1214         unsigned int val;
1215         /* immediate operand */
1216         val = UCOP_IMM_9;
1217         if (UCOP_SH_IM) {
1218             val = (val >> UCOP_SH_IM) | (val << (32 - UCOP_SH_IM));
1219         }
1220         tmp2 = new_tmp();
1221         tcg_gen_movi_i32(tmp2, val);
1222         if (logic_cc && UCOP_SH_IM) {
1223             gen_set_CF_bit31(tmp2);
1224         }
1225    } else {
1226         /* register */
1227         tmp2 = load_reg(s, UCOP_REG_M);
1228         if (UCOP_SET(5)) {
1229             tmp = load_reg(s, UCOP_REG_S);
1230             gen_uc32_shift_reg(tmp2, UCOP_SH_OP, tmp, logic_cc);
1231         } else {
1232             gen_uc32_shift_im(tmp2, UCOP_SH_OP, UCOP_SH_IM, logic_cc);
1233         }
1234     }
1235
1236     if (UCOP_OPCODES != 0x0f && UCOP_OPCODES != 0x0d) {
1237         tmp = load_reg(s, UCOP_REG_N);
1238     } else {
1239         TCGV_UNUSED(tmp);
1240     }
1241
1242     switch (UCOP_OPCODES) {
1243     case 0x00:
1244         tcg_gen_and_i32(tmp, tmp, tmp2);
1245         if (logic_cc) {
1246             gen_logic_CC(tmp);
1247         }
1248         store_reg_bx(s, UCOP_REG_D, tmp);
1249         break;
1250     case 0x01:
1251         tcg_gen_xor_i32(tmp, tmp, tmp2);
1252         if (logic_cc) {
1253             gen_logic_CC(tmp);
1254         }
1255         store_reg_bx(s, UCOP_REG_D, tmp);
1256         break;
1257     case 0x02:
1258         if (UCOP_SET_S && UCOP_REG_D == 31) {
1259             /* SUBS r31, ... is used for exception return.  */
1260             if (IS_USER(s)) {
1261                 ILLEGAL;
1262             }
1263             gen_helper_sub_cc(tmp, cpu_env, tmp, tmp2);
1264             gen_exception_return(s, tmp);
1265         } else {
1266             if (UCOP_SET_S) {
1267                 gen_helper_sub_cc(tmp, cpu_env, tmp, tmp2);
1268             } else {
1269                 tcg_gen_sub_i32(tmp, tmp, tmp2);
1270             }
1271             store_reg_bx(s, UCOP_REG_D, tmp);
1272         }
1273         break;
1274     case 0x03:
1275         if (UCOP_SET_S) {
1276             gen_helper_sub_cc(tmp, cpu_env, tmp2, tmp);
1277         } else {
1278             tcg_gen_sub_i32(tmp, tmp2, tmp);
1279         }
1280         store_reg_bx(s, UCOP_REG_D, tmp);
1281         break;
1282     case 0x04:
1283         if (UCOP_SET_S) {
1284             gen_helper_add_cc(tmp, cpu_env, tmp, tmp2);
1285         } else {
1286             tcg_gen_add_i32(tmp, tmp, tmp2);
1287         }
1288         store_reg_bx(s, UCOP_REG_D, tmp);
1289         break;
1290     case 0x05:
1291         if (UCOP_SET_S) {
1292             gen_helper_adc_cc(tmp, cpu_env, tmp, tmp2);
1293         } else {
1294             gen_add_carry(tmp, tmp, tmp2);
1295         }
1296         store_reg_bx(s, UCOP_REG_D, tmp);
1297         break;
1298     case 0x06:
1299         if (UCOP_SET_S) {
1300             gen_helper_sbc_cc(tmp, cpu_env, tmp, tmp2);
1301         } else {
1302             gen_sub_carry(tmp, tmp, tmp2);
1303         }
1304         store_reg_bx(s, UCOP_REG_D, tmp);
1305         break;
1306     case 0x07:
1307         if (UCOP_SET_S) {
1308             gen_helper_sbc_cc(tmp, cpu_env, tmp2, tmp);
1309         } else {
1310             gen_sub_carry(tmp, tmp2, tmp);
1311         }
1312         store_reg_bx(s, UCOP_REG_D, tmp);
1313         break;
1314     case 0x08:
1315         if (UCOP_SET_S) {
1316             tcg_gen_and_i32(tmp, tmp, tmp2);
1317             gen_logic_CC(tmp);
1318         }
1319         dead_tmp(tmp);
1320         break;
1321     case 0x09:
1322         if (UCOP_SET_S) {
1323             tcg_gen_xor_i32(tmp, tmp, tmp2);
1324             gen_logic_CC(tmp);
1325         }
1326         dead_tmp(tmp);
1327         break;
1328     case 0x0a:
1329         if (UCOP_SET_S) {
1330             gen_helper_sub_cc(tmp, cpu_env, tmp, tmp2);
1331         }
1332         dead_tmp(tmp);
1333         break;
1334     case 0x0b:
1335         if (UCOP_SET_S) {
1336             gen_helper_add_cc(tmp, cpu_env, tmp, tmp2);
1337         }
1338         dead_tmp(tmp);
1339         break;
1340     case 0x0c:
1341         tcg_gen_or_i32(tmp, tmp, tmp2);
1342         if (logic_cc) {
1343             gen_logic_CC(tmp);
1344         }
1345         store_reg_bx(s, UCOP_REG_D, tmp);
1346         break;
1347     case 0x0d:
1348         if (logic_cc && UCOP_REG_D == 31) {
1349             /* MOVS r31, ... is used for exception return.  */
1350             if (IS_USER(s)) {
1351                 ILLEGAL;
1352             }
1353             gen_exception_return(s, tmp2);
1354         } else {
1355             if (logic_cc) {
1356                 gen_logic_CC(tmp2);
1357             }
1358             store_reg_bx(s, UCOP_REG_D, tmp2);
1359         }
1360         break;
1361     case 0x0e:
1362         tcg_gen_andc_i32(tmp, tmp, tmp2);
1363         if (logic_cc) {
1364             gen_logic_CC(tmp);
1365         }
1366         store_reg_bx(s, UCOP_REG_D, tmp);
1367         break;
1368     default:
1369     case 0x0f:
1370         tcg_gen_not_i32(tmp2, tmp2);
1371         if (logic_cc) {
1372             gen_logic_CC(tmp2);
1373         }
1374         store_reg_bx(s, UCOP_REG_D, tmp2);
1375         break;
1376     }
1377     if (UCOP_OPCODES != 0x0f && UCOP_OPCODES != 0x0d) {
1378         dead_tmp(tmp2);
1379     }
1380 }
1381
1382 /* multiply */
1383 static void do_mult(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1384 {
1385     TCGv tmp, tmp2, tmp3, tmp4;
1386
1387     if (UCOP_SET(27)) {
1388         /* 64 bit mul */
1389         tmp = load_reg(s, UCOP_REG_M);
1390         tmp2 = load_reg(s, UCOP_REG_N);
1391         if (UCOP_SET(26)) {
1392             tcg_gen_muls2_i32(tmp, tmp2, tmp, tmp2);
1393         } else {
1394             tcg_gen_mulu2_i32(tmp, tmp2, tmp, tmp2);
1395         }
1396         if (UCOP_SET(25)) { /* mult accumulate */
1397             tmp3 = load_reg(s, UCOP_REG_LO);
1398             tmp4 = load_reg(s, UCOP_REG_HI);
1399             tcg_gen_add2_i32(tmp, tmp2, tmp, tmp2, tmp3, tmp4);
1400             dead_tmp(tmp3);
1401             dead_tmp(tmp4);
1402         }
1403         store_reg(s, UCOP_REG_LO, tmp);
1404         store_reg(s, UCOP_REG_HI, tmp2);
1405     } else {
1406         /* 32 bit mul */
1407         tmp = load_reg(s, UCOP_REG_M);
1408         tmp2 = load_reg(s, UCOP_REG_N);
1409         tcg_gen_mul_i32(tmp, tmp, tmp2);
1410         dead_tmp(tmp2);
1411         if (UCOP_SET(25)) {
1412             /* Add */
1413             tmp2 = load_reg(s, UCOP_REG_S);
1414             tcg_gen_add_i32(tmp, tmp, tmp2);
1415             dead_tmp(tmp2);
1416         }
1417         if (UCOP_SET_S) {
1418             gen_logic_CC(tmp);
1419         }
1420         store_reg(s, UCOP_REG_D, tmp);
1421     }
1422 }
1423
1424 /* miscellaneous instructions */
1425 static void do_misc(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1426 {
1427     unsigned int val;
1428     TCGv tmp;
1429
1430     if ((insn & 0xffffffe0) == 0x10ffc120) {
1431         /* Trivial implementation equivalent to bx.  */
1432         tmp = load_reg(s, UCOP_REG_M);
1433         gen_bx(s, tmp);
1434         return;
1435     }
1436
1437     if ((insn & 0xfbffc000) == 0x30ffc000) {
1438         /* PSR = immediate */
1439         val = UCOP_IMM_9;
1440         if (UCOP_SH_IM) {
1441             val = (val >> UCOP_SH_IM) | (val << (32 - UCOP_SH_IM));
1442         }
1443         tmp = new_tmp();
1444         tcg_gen_movi_i32(tmp, val);
1445         if (gen_set_psr(s, ~ASR_RESERVED, UCOP_SET_B, tmp)) {
1446             ILLEGAL;
1447         }
1448         return;
1449     }
1450
1451     if ((insn & 0xfbffffe0) == 0x12ffc020) {
1452         /* PSR.flag = reg */
1453         tmp = load_reg(s, UCOP_REG_M);
1454         if (gen_set_psr(s, ASR_NZCV, UCOP_SET_B, tmp)) {
1455             ILLEGAL;
1456         }
1457         return;
1458     }
1459
1460     if ((insn & 0xfbffffe0) == 0x10ffc020) {
1461         /* PSR = reg */
1462         tmp = load_reg(s, UCOP_REG_M);
1463         if (gen_set_psr(s, ~ASR_RESERVED, UCOP_SET_B, tmp)) {
1464             ILLEGAL;
1465         }
1466         return;
1467     }
1468
1469     if ((insn & 0xfbf83fff) == 0x10f80000) {
1470         /* reg = PSR */
1471         if (UCOP_SET_B) {
1472             if (IS_USER(s)) {
1473                 ILLEGAL;
1474             }
1475             tmp = load_cpu_field(bsr);
1476         } else {
1477             tmp = new_tmp();
1478             gen_helper_asr_read(tmp, cpu_env);
1479         }
1480         store_reg(s, UCOP_REG_D, tmp);
1481         return;
1482     }
1483
1484     if ((insn & 0xfbf83fe0) == 0x12f80120) {
1485         /* clz */
1486         tmp = load_reg(s, UCOP_REG_M);
1487         if (UCOP_SET(26)) {
1488             gen_helper_clo(tmp, tmp);
1489         } else {
1490             gen_helper_clz(tmp, tmp);
1491         }
1492         store_reg(s, UCOP_REG_D, tmp);
1493         return;
1494     }
1495
1496     /* otherwise */
1497     ILLEGAL;
1498 }
1499
1500 /* load/store I_offset and R_offset */
1501 static void do_ldst_ir(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1502 {
1503     unsigned int mmu_idx;
1504     TCGv tmp;
1505     TCGv tmp2;
1506
1507     tmp2 = load_reg(s, UCOP_REG_N);
1508     mmu_idx = (IS_USER(s) || (!UCOP_SET_P && UCOP_SET_W));
1509
1510     /* immediate */
1511     if (UCOP_SET_P) {
1512         gen_add_data_offset(s, insn, tmp2);
1513     }
1514
1515     if (UCOP_SET_L) {
1516         /* load */
1517         if (UCOP_SET_B) {
1518             tmp = gen_ld8u(tmp2, mmu_idx);
1519         } else {
1520             tmp = gen_ld32(tmp2, mmu_idx);
1521         }
1522     } else {
1523         /* store */
1524         tmp = load_reg(s, UCOP_REG_D);
1525         if (UCOP_SET_B) {
1526             gen_st8(tmp, tmp2, mmu_idx);
1527         } else {
1528             gen_st32(tmp, tmp2, mmu_idx);
1529         }
1530     }
1531     if (!UCOP_SET_P) {
1532         gen_add_data_offset(s, insn, tmp2);
1533         store_reg(s, UCOP_REG_N, tmp2);
1534     } else if (UCOP_SET_W) {
1535         store_reg(s, UCOP_REG_N, tmp2);
1536     } else {
1537         dead_tmp(tmp2);
1538     }
1539     if (UCOP_SET_L) {
1540         /* Complete the load.  */
1541         if (UCOP_REG_D == 31) {
1542             gen_bx(s, tmp);
1543         } else {
1544             store_reg(s, UCOP_REG_D, tmp);
1545         }
1546     }
1547 }
1548
1549 /* SWP instruction */
1550 static void do_swap(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1551 {
1552     TCGv addr;
1553     TCGv tmp;
1554     TCGv tmp2;
1555
1556     if ((insn & 0xff003fe0) != 0x40000120) {
1557         ILLEGAL;
1558     }
1559
1560     /* ??? This is not really atomic.  However we know
1561        we never have multiple CPUs running in parallel,
1562        so it is good enough.  */
1563     addr = load_reg(s, UCOP_REG_N);
1564     tmp = load_reg(s, UCOP_REG_M);
1565     if (UCOP_SET_B) {
1566         tmp2 = gen_ld8u(addr, IS_USER(s));
1567         gen_st8(tmp, addr, IS_USER(s));
1568     } else {
1569         tmp2 = gen_ld32(addr, IS_USER(s));
1570         gen_st32(tmp, addr, IS_USER(s));
1571     }
1572     dead_tmp(addr);
1573     store_reg(s, UCOP_REG_D, tmp2);
1574 }
1575
1576 /* load/store hw/sb */
1577 static void do_ldst_hwsb(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1578 {
1579     TCGv addr;
1580     TCGv tmp;
1581
1582     if (UCOP_SH_OP == 0) {
1583         do_swap(env, s, insn);
1584         return;
1585     }
1586
1587     addr = load_reg(s, UCOP_REG_N);
1588     if (UCOP_SET_P) {
1589         gen_add_datah_offset(s, insn, addr);
1590     }
1591
1592     if (UCOP_SET_L) { /* load */
1593         switch (UCOP_SH_OP) {
1594         case 1:
1595             tmp = gen_ld16u(addr, IS_USER(s));
1596             break;
1597         case 2:
1598             tmp = gen_ld8s(addr, IS_USER(s));
1599             break;
1600         default: /* see do_swap */
1601         case 3:
1602             tmp = gen_ld16s(addr, IS_USER(s));
1603             break;
1604         }
1605     } else { /* store */
1606         if (UCOP_SH_OP != 1) {
1607             ILLEGAL;
1608         }
1609         tmp = load_reg(s, UCOP_REG_D);
1610         gen_st16(tmp, addr, IS_USER(s));
1611     }
1612     /* Perform base writeback before the loaded value to
1613        ensure correct behavior with overlapping index registers. */
1614     if (!UCOP_SET_P) {
1615         gen_add_datah_offset(s, insn, addr);
1616         store_reg(s, UCOP_REG_N, addr);
1617     } else if (UCOP_SET_W) {
1618         store_reg(s, UCOP_REG_N, addr);
1619     } else {
1620         dead_tmp(addr);
1621     }
1622     if (UCOP_SET_L) {
1623         /* Complete the load.  */
1624         store_reg(s, UCOP_REG_D, tmp);
1625     }
1626 }
1627
1628 /* load/store multiple words */
1629 static void do_ldst_m(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1630 {
1631     unsigned int val, i, mmu_idx;
1632     int j, n, reg, user, loaded_base;
1633     TCGv tmp;
1634     TCGv tmp2;
1635     TCGv addr;
1636     TCGv loaded_var;
1637
1638     if (UCOP_SET(7)) {
1639         ILLEGAL;
1640     }
1641     /* XXX: store correct base if write back */
1642     user = 0;
1643     if (UCOP_SET_B) { /* S bit in instruction table */
1644         if (IS_USER(s)) {
1645             ILLEGAL; /* only usable in supervisor mode */
1646         }
1647         if (UCOP_SET(18) == 0) { /* pc reg */
1648             user = 1;
1649         }
1650     }
1651
1652     mmu_idx = (IS_USER(s) || (!UCOP_SET_P && UCOP_SET_W));
1653     addr = load_reg(s, UCOP_REG_N);
1654
1655     /* compute total size */
1656     loaded_base = 0;
1657     TCGV_UNUSED(loaded_var);
1658     n = 0;
1659     for (i = 0; i < 6; i++) {
1660         if (UCOP_SET(i)) {
1661             n++;
1662         }
1663     }
1664     for (i = 9; i < 19; i++) {
1665         if (UCOP_SET(i)) {
1666             n++;
1667         }
1668     }
1669     /* XXX: test invalid n == 0 case ? */
1670     if (UCOP_SET_U) {
1671         if (UCOP_SET_P) {
1672             /* pre increment */
1673             tcg_gen_addi_i32(addr, addr, 4);
1674         } else {
1675             /* post increment */
1676         }
1677     } else {
1678         if (UCOP_SET_P) {
1679             /* pre decrement */
1680             tcg_gen_addi_i32(addr, addr, -(n * 4));
1681         } else {
1682             /* post decrement */
1683             if (n != 1) {
1684                 tcg_gen_addi_i32(addr, addr, -((n - 1) * 4));
1685             }
1686         }
1687     }
1688
1689     j = 0;
1690     reg = UCOP_SET(6) ? 16 : 0;
1691     for (i = 0; i < 19; i++, reg++) {
1692         if (i == 6) {
1693             i = i + 3;
1694         }
1695         if (UCOP_SET(i)) {
1696             if (UCOP_SET_L) { /* load */
1697                 tmp = gen_ld32(addr, mmu_idx);
1698                 if (reg == 31) {
1699                     gen_bx(s, tmp);
1700                 } else if (user) {
1701                     tmp2 = tcg_const_i32(reg);
1702                     gen_helper_set_user_reg(cpu_env, tmp2, tmp);
1703                     tcg_temp_free_i32(tmp2);
1704                     dead_tmp(tmp);
1705                 } else if (reg == UCOP_REG_N) {
1706                     loaded_var = tmp;
1707                     loaded_base = 1;
1708                 } else {
1709                     store_reg(s, reg, tmp);
1710                 }
1711             } else { /* store */
1712                 if (reg == 31) {
1713                     /* special case: r31 = PC + 4 */
1714                     val = (long)s->pc;
1715                     tmp = new_tmp();
1716                     tcg_gen_movi_i32(tmp, val);
1717                 } else if (user) {
1718                     tmp = new_tmp();
1719                     tmp2 = tcg_const_i32(reg);
1720                     gen_helper_get_user_reg(tmp, cpu_env, tmp2);
1721                     tcg_temp_free_i32(tmp2);
1722                 } else {
1723                     tmp = load_reg(s, reg);
1724                 }
1725                 gen_st32(tmp, addr, mmu_idx);
1726             }
1727             j++;
1728             /* no need to add after the last transfer */
1729             if (j != n) {
1730                 tcg_gen_addi_i32(addr, addr, 4);
1731             }
1732         }
1733     }
1734     if (UCOP_SET_W) { /* write back */
1735         if (UCOP_SET_U) {
1736             if (UCOP_SET_P) {
1737                 /* pre increment */
1738             } else {
1739                 /* post increment */
1740                 tcg_gen_addi_i32(addr, addr, 4);
1741             }
1742         } else {
1743             if (UCOP_SET_P) {
1744                 /* pre decrement */
1745                 if (n != 1) {
1746                     tcg_gen_addi_i32(addr, addr, -((n - 1) * 4));
1747                 }
1748             } else {
1749                 /* post decrement */
1750                 tcg_gen_addi_i32(addr, addr, -(n * 4));
1751             }
1752         }
1753         store_reg(s, UCOP_REG_N, addr);
1754     } else {
1755         dead_tmp(addr);
1756     }
1757     if (loaded_base) {
1758         store_reg(s, UCOP_REG_N, loaded_var);
1759     }
1760     if (UCOP_SET_B && !user) {
1761         /* Restore ASR from BSR.  */
1762         tmp = load_cpu_field(bsr);
1763         gen_set_asr(tmp, 0xffffffff);
1764         dead_tmp(tmp);
1765         s->is_jmp = DISAS_UPDATE;
1766     }
1767 }
1768
1769 /* branch (and link) */
1770 static void do_branch(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
1771 {
1772     unsigned int val;
1773     int32_t offset;
1774     TCGv tmp;
1775
1776     if (UCOP_COND == 0xf) {
1777         ILLEGAL;
1778     }
1779
1780     if (UCOP_COND != 0xe) {
1781         /* if not always execute, we generate a conditional jump to
1782            next instruction */
1783         s->condlabel = gen_new_label();
1784         gen_test_cc(UCOP_COND ^ 1, s->condlabel);
1785         s->condjmp = 1;
1786     }
1787
1788     val = (int32_t)s->pc;
1789     if (UCOP_SET_L) {
1790         tmp = new_tmp();
1791         tcg_gen_movi_i32(tmp, val);
1792         store_reg(s, 30, tmp);
1793     }
1794     offset = (((int32_t)insn << 8) >> 8);
1795     val += (offset << 2); /* unicore is pc+4 */
1796     gen_jmp(s, val);
1797 }
1798
1799 static void disas_uc32_insn(CPUUniCore32State *env, DisasContext *s)
1800 {
1801     unsigned int insn;
1802
1803     if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
1804         tcg_gen_debug_insn_start(s->pc);
1805     }
1806
1807     insn = cpu_ldl_code(env, s->pc);
1808     s->pc += 4;
1809
1810     /* UniCore instructions class:
1811      * AAAB BBBC xxxx xxxx xxxx xxxD xxEx xxxx
1812      * AAA  : see switch case
1813      * BBBB : opcodes or cond or PUBW
1814      * C    : S OR L
1815      * D    : 8
1816      * E    : 5
1817      */
1818     switch (insn >> 29) {
1819     case 0x0:
1820         if (UCOP_SET(5) && UCOP_SET(8) && !UCOP_SET(28)) {
1821             do_mult(env, s, insn);
1822             break;
1823         }
1824
1825         if (UCOP_SET(8)) {
1826             do_misc(env, s, insn);
1827             break;
1828         }
1829     case 0x1:
1830         if (((UCOP_OPCODES >> 2) == 2) && !UCOP_SET_S) {
1831             do_misc(env, s, insn);
1832             break;
1833         }
1834         do_datap(env, s, insn);
1835         break;
1836
1837     case 0x2:
1838         if (UCOP_SET(8) && UCOP_SET(5)) {
1839             do_ldst_hwsb(env, s, insn);
1840             break;
1841         }
1842         if (UCOP_SET(8) || UCOP_SET(5)) {
1843             ILLEGAL;
1844         }
1845     case 0x3:
1846         do_ldst_ir(env, s, insn);
1847         break;
1848
1849     case 0x4:
1850         if (UCOP_SET(8)) {
1851             ILLEGAL; /* extended instructions */
1852         }
1853         do_ldst_m(env, s, insn);
1854         break;
1855     case 0x5:
1856         do_branch(env, s, insn);
1857         break;
1858     case 0x6:
1859         /* Coprocessor.  */
1860         disas_coproc_insn(env, s, insn);
1861         break;
1862     case 0x7:
1863         if (!UCOP_SET(28)) {
1864             disas_coproc_insn(env, s, insn);
1865             break;
1866         }
1867         if ((insn & 0xff000000) == 0xff000000) { /* syscall */
1868             gen_set_pc_im(s->pc);
1869             s->is_jmp = DISAS_SYSCALL;
1870             break;
1871         }
1872         ILLEGAL;
1873     }
1874 }
1875
1876 /* generate intermediate code in gen_opc_buf and gen_opparam_buf for
1877    basic block 'tb'. If search_pc is TRUE, also generate PC
1878    information for each intermediate instruction. */
1879 static inline void gen_intermediate_code_internal(UniCore32CPU *cpu,
1880         TranslationBlock *tb, bool search_pc)
1881 {
1882     CPUState *cs = CPU(cpu);
1883     CPUUniCore32State *env = &cpu->env;
1884     DisasContext dc1, *dc = &dc1;
1885     CPUBreakpoint *bp;
1886     uint16_t *gen_opc_end;
1887     int j, lj;
1888     target_ulong pc_start;
1889     uint32_t next_page_start;
1890     int num_insns;
1891     int max_insns;
1892
1893     /* generate intermediate code */
1894     num_temps = 0;
1895
1896     pc_start = tb->pc;
1897
1898     dc->tb = tb;
1899
1900     gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
1901
1902     dc->is_jmp = DISAS_NEXT;
1903     dc->pc = pc_start;
1904     dc->singlestep_enabled = cs->singlestep_enabled;
1905     dc->condjmp = 0;
1906     cpu_F0s = tcg_temp_new_i32();
1907     cpu_F1s = tcg_temp_new_i32();
1908     cpu_F0d = tcg_temp_new_i64();
1909     cpu_F1d = tcg_temp_new_i64();
1910     next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1911     lj = -1;
1912     num_insns = 0;
1913     max_insns = tb->cflags & CF_COUNT_MASK;
1914     if (max_insns == 0) {
1915         max_insns = CF_COUNT_MASK;
1916     }
1917
1918 #ifndef CONFIG_USER_ONLY
1919     if ((env->uncached_asr & ASR_M) == ASR_MODE_USER) {
1920         dc->user = 1;
1921     } else {
1922         dc->user = 0;
1923     }
1924 #endif
1925
1926     gen_tb_start();
1927     do {
1928         if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1929             QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1930                 if (bp->pc == dc->pc) {
1931                     gen_set_pc_im(dc->pc);
1932                     gen_exception(EXCP_DEBUG);
1933                     dc->is_jmp = DISAS_JUMP;
1934                     /* Advance PC so that clearing the breakpoint will
1935                        invalidate this TB.  */
1936                     dc->pc += 2; /* FIXME */
1937                     goto done_generating;
1938                 }
1939             }
1940         }
1941         if (search_pc) {
1942             j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
1943             if (lj < j) {
1944                 lj++;
1945                 while (lj < j) {
1946                     tcg_ctx.gen_opc_instr_start[lj++] = 0;
1947                 }
1948             }
1949             tcg_ctx.gen_opc_pc[lj] = dc->pc;
1950             tcg_ctx.gen_opc_instr_start[lj] = 1;
1951             tcg_ctx.gen_opc_icount[lj] = num_insns;
1952         }
1953
1954         if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) {
1955             gen_io_start();
1956         }
1957
1958         disas_uc32_insn(env, dc);
1959
1960         if (num_temps) {
1961             fprintf(stderr, "Internal resource leak before %08x\n", dc->pc);
1962             num_temps = 0;
1963         }
1964
1965         if (dc->condjmp && !dc->is_jmp) {
1966             gen_set_label(dc->condlabel);
1967             dc->condjmp = 0;
1968         }
1969         /* Translation stops when a conditional branch is encountered.
1970          * Otherwise the subsequent code could get translated several times.
1971          * Also stop translation when a page boundary is reached.  This
1972          * ensures prefetch aborts occur at the right place.  */
1973         num_insns++;
1974     } while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
1975              !cs->singlestep_enabled &&
1976              !singlestep &&
1977              dc->pc < next_page_start &&
1978              num_insns < max_insns);
1979
1980     if (tb->cflags & CF_LAST_IO) {
1981         if (dc->condjmp) {
1982             /* FIXME:  This can theoretically happen with self-modifying
1983                code.  */
1984             cpu_abort(env, "IO on conditional branch instruction");
1985         }
1986         gen_io_end();
1987     }
1988
1989     /* At this stage dc->condjmp will only be set when the skipped
1990        instruction was a conditional branch or trap, and the PC has
1991        already been written.  */
1992     if (unlikely(cs->singlestep_enabled)) {
1993         /* Make sure the pc is updated, and raise a debug exception.  */
1994         if (dc->condjmp) {
1995             if (dc->is_jmp == DISAS_SYSCALL) {
1996                 gen_exception(UC32_EXCP_PRIV);
1997             } else {
1998                 gen_exception(EXCP_DEBUG);
1999             }
2000             gen_set_label(dc->condlabel);
2001         }
2002         if (dc->condjmp || !dc->is_jmp) {
2003             gen_set_pc_im(dc->pc);
2004             dc->condjmp = 0;
2005         }
2006         if (dc->is_jmp == DISAS_SYSCALL && !dc->condjmp) {
2007             gen_exception(UC32_EXCP_PRIV);
2008         } else {
2009             gen_exception(EXCP_DEBUG);
2010         }
2011     } else {
2012         /* While branches must always occur at the end of an IT block,
2013            there are a few other things that can cause us to terminate
2014            the TB in the middel of an IT block:
2015             - Exception generating instructions (bkpt, swi, undefined).
2016             - Page boundaries.
2017             - Hardware watchpoints.
2018            Hardware breakpoints have already been handled and skip this code.
2019          */
2020         switch (dc->is_jmp) {
2021         case DISAS_NEXT:
2022             gen_goto_tb(dc, 1, dc->pc);
2023             break;
2024         default:
2025         case DISAS_JUMP:
2026         case DISAS_UPDATE:
2027             /* indicate that the hash table must be used to find the next TB */
2028             tcg_gen_exit_tb(0);
2029             break;
2030         case DISAS_TB_JUMP:
2031             /* nothing more to generate */
2032             break;
2033         case DISAS_SYSCALL:
2034             gen_exception(UC32_EXCP_PRIV);
2035             break;
2036         }
2037         if (dc->condjmp) {
2038             gen_set_label(dc->condlabel);
2039             gen_goto_tb(dc, 1, dc->pc);
2040             dc->condjmp = 0;
2041         }
2042     }
2043
2044 done_generating:
2045     gen_tb_end(tb, num_insns);
2046     *tcg_ctx.gen_opc_ptr = INDEX_op_end;
2047
2048 #ifdef DEBUG_DISAS
2049     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
2050         qemu_log("----------------\n");
2051         qemu_log("IN: %s\n", lookup_symbol(pc_start));
2052         log_target_disas(env, pc_start, dc->pc - pc_start, 0);
2053         qemu_log("\n");
2054     }
2055 #endif
2056     if (search_pc) {
2057         j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
2058         lj++;
2059         while (lj <= j) {
2060             tcg_ctx.gen_opc_instr_start[lj++] = 0;
2061         }
2062     } else {
2063         tb->size = dc->pc - pc_start;
2064         tb->icount = num_insns;
2065     }
2066 }
2067
2068 void gen_intermediate_code(CPUUniCore32State *env, TranslationBlock *tb)
2069 {
2070     gen_intermediate_code_internal(uc32_env_get_cpu(env), tb, false);
2071 }
2072
2073 void gen_intermediate_code_pc(CPUUniCore32State *env, TranslationBlock *tb)
2074 {
2075     gen_intermediate_code_internal(uc32_env_get_cpu(env), tb, true);
2076 }
2077
2078 static const char *cpu_mode_names[16] = {
2079     "USER", "REAL", "INTR", "PRIV", "UM14", "UM15", "UM16", "TRAP",
2080     "UM18", "UM19", "UM1A", "EXTN", "UM1C", "UM1D", "UM1E", "SUSR"
2081 };
2082
2083 #undef UCF64_DUMP_STATE
2084 #ifdef UCF64_DUMP_STATE
2085 static void cpu_dump_state_ucf64(CPUUniCore32State *env, FILE *f,
2086         fprintf_function cpu_fprintf, int flags)
2087 {
2088     int i;
2089     union {
2090         uint32_t i;
2091         float s;
2092     } s0, s1;
2093     CPU_DoubleU d;
2094     /* ??? This assumes float64 and double have the same layout.
2095        Oh well, it's only debug dumps.  */
2096     union {
2097         float64 f64;
2098         double d;
2099     } d0;
2100
2101     for (i = 0; i < 16; i++) {
2102         d.d = env->ucf64.regs[i];
2103         s0.i = d.l.lower;
2104         s1.i = d.l.upper;
2105         d0.f64 = d.d;
2106         cpu_fprintf(f, "s%02d=%08x(%8g) s%02d=%08x(%8g)",
2107                     i * 2, (int)s0.i, s0.s,
2108                     i * 2 + 1, (int)s1.i, s1.s);
2109         cpu_fprintf(f, " d%02d=%" PRIx64 "(%8g)\n",
2110                     i, (uint64_t)d0.f64, d0.d);
2111     }
2112     cpu_fprintf(f, "FPSCR: %08x\n", (int)env->ucf64.xregs[UC32_UCF64_FPSCR]);
2113 }
2114 #else
2115 #define cpu_dump_state_ucf64(env, file, pr, flags)      do { } while (0)
2116 #endif
2117
2118 void uc32_cpu_dump_state(CPUState *cs, FILE *f,
2119                          fprintf_function cpu_fprintf, int flags)
2120 {
2121     UniCore32CPU *cpu = UNICORE32_CPU(cs);
2122     CPUUniCore32State *env = &cpu->env;
2123     int i;
2124     uint32_t psr;
2125
2126     for (i = 0; i < 32; i++) {
2127         cpu_fprintf(f, "R%02d=%08x", i, env->regs[i]);
2128         if ((i % 4) == 3) {
2129             cpu_fprintf(f, "\n");
2130         } else {
2131             cpu_fprintf(f, " ");
2132         }
2133     }
2134     psr = cpu_asr_read(env);
2135     cpu_fprintf(f, "PSR=%08x %c%c%c%c %s\n",
2136                 psr,
2137                 psr & (1 << 31) ? 'N' : '-',
2138                 psr & (1 << 30) ? 'Z' : '-',
2139                 psr & (1 << 29) ? 'C' : '-',
2140                 psr & (1 << 28) ? 'V' : '-',
2141                 cpu_mode_names[psr & 0xf]);
2142
2143     cpu_dump_state_ucf64(env, f, cpu_fprintf, flags);
2144 }
2145
2146 void restore_state_to_opc(CPUUniCore32State *env, TranslationBlock *tb, int pc_pos)
2147 {
2148     env->regs[31] = tcg_ctx.gen_opc_pc[pc_pos];
2149 }