target-arm/op.c

   1 /*
   2  *  ARM micro operations
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *  Copyright (c) 2005 CodeSourcery, LLC
   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 #include "exec.h"
  22
  23 #define REGNAME r0
  24 #define REG (env->regs[0])
  25 #include "op_template.h"
  26
  27 #define REGNAME r1
  28 #define REG (env->regs[1])
  29 #include "op_template.h"
  30
  31 #define REGNAME r2
  32 #define REG (env->regs[2])
  33 #include "op_template.h"
  34
  35 #define REGNAME r3
  36 #define REG (env->regs[3])
  37 #include "op_template.h"
  38
  39 #define REGNAME r4
  40 #define REG (env->regs[4])
  41 #include "op_template.h"
  42
  43 #define REGNAME r5
  44 #define REG (env->regs[5])
  45 #include "op_template.h"
  46
  47 #define REGNAME r6
  48 #define REG (env->regs[6])
  49 #include "op_template.h"
  50
  51 #define REGNAME r7
  52 #define REG (env->regs[7])
  53 #include "op_template.h"
  54
  55 #define REGNAME r8
  56 #define REG (env->regs[8])
  57 #include "op_template.h"
  58
  59 #define REGNAME r9
  60 #define REG (env->regs[9])
  61 #include "op_template.h"
  62
  63 #define REGNAME r10
  64 #define REG (env->regs[10])
  65 #include "op_template.h"
  66
  67 #define REGNAME r11
  68 #define REG (env->regs[11])
  69 #include "op_template.h"
  70
  71 #define REGNAME r12
  72 #define REG (env->regs[12])
  73 #include "op_template.h"
  74
  75 #define REGNAME r13
  76 #define REG (env->regs[13])
  77 #include "op_template.h"
  78
  79 #define REGNAME r14
  80 #define REG (env->regs[14])
  81 #include "op_template.h"
  82
  83 #define REGNAME r15
  84 #define REG (env->regs[15])
  85 #define SET_REG(x) REG = x & ~(uint32_t)1
  86 #include "op_template.h"
  87
  88 void OPPROTO op_bx_T0(void)
  89 {
  90   env->regs[15] = T0 & ~(uint32_t)1;
  91   env->thumb = (T0 & 1) != 0;
  92 }
  93
  94 void OPPROTO op_movl_T0_0(void)
  95 {
  96     T0 = 0;
  97 }
  98
  99 void OPPROTO op_movl_T0_im(void)
 100 {
 101     T0 = PARAM1;
 102 }
 103
 104 void OPPROTO op_movl_T0_T1(void)
 105 {
 106     T0 = T1;
 107 }
 108
 109 void OPPROTO op_movl_T1_im(void)
 110 {
 111     T1 = PARAM1;
 112 }
 113
 114 void OPPROTO op_mov_CF_T1(void)
 115 {
 116     env->CF = ((uint32_t)T1) >> 31;
 117 }
 118
 119 void OPPROTO op_movl_T2_im(void)
 120 {
 121     T2 = PARAM1;
 122 }
 123
 124 void OPPROTO op_addl_T1_im(void)
 125 {
 126     T1 += PARAM1;
 127 }
 128
 129 void OPPROTO op_addl_T1_T2(void)
 130 {
 131     T1 += T2;
 132 }
 133
 134 void OPPROTO op_subl_T1_T2(void)
 135 {
 136     T1 -= T2;
 137 }
 138
 139 void OPPROTO op_addl_T0_T1(void)
 140 {
 141     T0 += T1;
 142 }
 143
 144 void OPPROTO op_addl_T0_T1_cc(void)
 145 {
 146     unsigned int src1;
 147     src1 = T0;
 148     T0 += T1;
 149     env->NZF = T0;
 150     env->CF = T0 < src1;
 151     env->VF = (src1 ^ T1 ^ -1) & (src1 ^ T0);
 152 }
 153
 154 void OPPROTO op_adcl_T0_T1(void)
 155 {
 156     T0 += T1 + env->CF;
 157 }
 158
 159 void OPPROTO op_adcl_T0_T1_cc(void)
 160 {
 161     unsigned int src1;
 162     src1 = T0;
 163     if (!env->CF) {
 164         T0 += T1;
 165         env->CF = T0 < src1;
 166     } else {
 167         T0 += T1 + 1;
 168         env->CF = T0 <= src1;
 169     }
 170     env->VF = (src1 ^ T1 ^ -1) & (src1 ^ T0);
 171     env->NZF = T0;
 172     FORCE_RET();
 173 }
 174
 175 #define OPSUB(sub, sbc, res, T0, T1)            \
 176                                                 \
 177 void OPPROTO op_ ## sub ## l_T0_T1(void)        \
 178 {                                               \
 179     res = T0 - T1;                              \
 180 }                                               \
 181                                                 \
 182 void OPPROTO op_ ## sub ## l_T0_T1_cc(void)     \
 183 {                                               \
 184     unsigned int src1;                          \
 185     src1 = T0;                                  \
 186     T0 -= T1;                                   \
 187     env->NZF = T0;                              \
 188     env->CF = src1 >= T1;                       \
 189     env->VF = (src1 ^ T1) & (src1 ^ T0);        \
 190     res = T0;                                   \
 191 }                                               \
 192                                                 \
 193 void OPPROTO op_ ## sbc ## l_T0_T1(void)        \
 194 {                                               \
 195     res = T0 - T1 + env->CF - 1;                \
 196 }                                               \
 197                                                 \
 198 void OPPROTO op_ ## sbc ## l_T0_T1_cc(void)     \
 199 {                                               \
 200     unsigned int src1;                          \
 201     src1 = T0;                                  \
 202     if (!env->CF) {                             \
 203         T0 = T0 - T1 - 1;                       \
 204         env->CF = src1 > T1;                    \
 205     } else {                                    \
 206         T0 = T0 - T1;                           \
 207         env->CF = src1 >= T1;                   \
 208     }                                           \
 209     env->VF = (src1 ^ T1) & (src1 ^ T0);        \
 210     env->NZF = T0;                              \
 211     res = T0;                                   \
 212     FORCE_RET();                                \
 213 }
 214
 215 OPSUB(sub, sbc, T0, T0, T1)
 216
 217 OPSUB(rsb, rsc, T0, T1, T0)
 218
 219 void OPPROTO op_andl_T0_T1(void)
 220 {
 221     T0 &= T1;
 222 }
 223
 224 void OPPROTO op_xorl_T0_T1(void)
 225 {
 226     T0 ^= T1;
 227 }
 228
 229 void OPPROTO op_orl_T0_T1(void)
 230 {
 231     T0 |= T1;
 232 }
 233
 234 void OPPROTO op_bicl_T0_T1(void)
 235 {
 236     T0 &= ~T1;
 237 }
 238
 239 void OPPROTO op_notl_T1(void)
 240 {
 241     T1 = ~T1;
 242 }
 243
 244 void OPPROTO op_logic_T0_cc(void)
 245 {
 246     env->NZF = T0;
 247 }
 248
 249 void OPPROTO op_logic_T1_cc(void)
 250 {
 251     env->NZF = T1;
 252 }
 253
 254 #define EIP (env->regs[15])
 255
 256 void OPPROTO op_test_eq(void)
 257 {
 258     if (env->NZF == 0)
 259         GOTO_LABEL_PARAM(1);;
 260     FORCE_RET();
 261 }
 262
 263 void OPPROTO op_test_ne(void)
 264 {
 265     if (env->NZF != 0)
 266         GOTO_LABEL_PARAM(1);;
 267     FORCE_RET();
 268 }
 269
 270 void OPPROTO op_test_cs(void)
 271 {
 272     if (env->CF != 0)
 273         GOTO_LABEL_PARAM(1);
 274     FORCE_RET();
 275 }
 276
 277 void OPPROTO op_test_cc(void)
 278 {
 279     if (env->CF == 0)
 280         GOTO_LABEL_PARAM(1);
 281     FORCE_RET();
 282 }
 283
 284 void OPPROTO op_test_mi(void)
 285 {
 286     if ((env->NZF & 0x80000000) != 0)
 287         GOTO_LABEL_PARAM(1);
 288     FORCE_RET();
 289 }
 290
 291 void OPPROTO op_test_pl(void)
 292 {
 293     if ((env->NZF & 0x80000000) == 0)
 294         GOTO_LABEL_PARAM(1);
 295     FORCE_RET();
 296 }
 297
 298 void OPPROTO op_test_vs(void)
 299 {
 300     if ((env->VF & 0x80000000) != 0)
 301         GOTO_LABEL_PARAM(1);
 302     FORCE_RET();
 303 }
 304
 305 void OPPROTO op_test_vc(void)
 306 {
 307     if ((env->VF & 0x80000000) == 0)
 308         GOTO_LABEL_PARAM(1);
 309     FORCE_RET();
 310 }
 311
 312 void OPPROTO op_test_hi(void)
 313 {
 314     if (env->CF != 0 && env->NZF != 0)
 315         GOTO_LABEL_PARAM(1);
 316     FORCE_RET();
 317 }
 318
 319 void OPPROTO op_test_ls(void)
 320 {
 321     if (env->CF == 0 || env->NZF == 0)
 322         GOTO_LABEL_PARAM(1);
 323     FORCE_RET();
 324 }
 325
 326 void OPPROTO op_test_ge(void)
 327 {
 328     if (((env->VF ^ env->NZF) & 0x80000000) == 0)
 329         GOTO_LABEL_PARAM(1);
 330     FORCE_RET();
 331 }
 332
 333 void OPPROTO op_test_lt(void)
 334 {
 335     if (((env->VF ^ env->NZF) & 0x80000000) != 0)
 336         GOTO_LABEL_PARAM(1);
 337     FORCE_RET();
 338 }
 339
 340 void OPPROTO op_test_gt(void)
 341 {
 342     if (env->NZF != 0 && ((env->VF ^ env->NZF) & 0x80000000) == 0)
 343         GOTO_LABEL_PARAM(1);
 344     FORCE_RET();
 345 }
 346
 347 void OPPROTO op_test_le(void)
 348 {
 349     if (env->NZF == 0 || ((env->VF ^ env->NZF) & 0x80000000) != 0)
 350         GOTO_LABEL_PARAM(1);
 351     FORCE_RET();
 352 }
 353
 354 void OPPROTO op_goto_tb0(void)
 355 {
 356     GOTO_TB(op_goto_tb0, PARAM1, 0);
 357 }
 358
 359 void OPPROTO op_goto_tb1(void)
 360 {
 361     GOTO_TB(op_goto_tb1, PARAM1, 1);
 362 }
 363
 364 void OPPROTO op_exit_tb(void)
 365 {
 366     EXIT_TB();
 367 }
 368
 369 void OPPROTO op_movl_T0_cpsr(void)
 370 {
 371     T0 = cpsr_read(env);
 372     FORCE_RET();
 373 }
 374
 375 void OPPROTO op_movl_T0_spsr(void)
 376 {
 377     T0 = env->spsr;
 378 }
 379
 380 void OPPROTO op_movl_spsr_T0(void)
 381 {
 382     uint32_t mask = PARAM1;
 383     env->spsr = (env->spsr & ~mask) | (T0 & mask);
 384 }
 385
 386 void OPPROTO op_movl_cpsr_T0(void)
 387 {
 388     cpsr_write(env, T0, PARAM1);
 389     FORCE_RET();
 390 }
 391
 392 void OPPROTO op_mul_T0_T1(void)
 393 {
 394     T0 = T0 * T1;
 395 }
 396
 397 /* 64 bit unsigned mul */
 398 void OPPROTO op_mull_T0_T1(void)
 399 {
 400     uint64_t res;
 401     res = (uint64_t)T0 * (uint64_t)T1;
 402     T1 = res >> 32;
 403     T0 = res;
 404 }
 405
 406 /* 64 bit signed mul */
 407 void OPPROTO op_imull_T0_T1(void)
 408 {
 409     uint64_t res;
 410     res = (int64_t)((int32_t)T0) * (int64_t)((int32_t)T1);
 411     T1 = res >> 32;
 412     T0 = res;
 413 }
 414
 415 /* 48 bit signed mul, top 32 bits */
 416 void OPPROTO op_imulw_T0_T1(void)
 417 {
 418   uint64_t res;
 419   res = (int64_t)((int32_t)T0) * (int64_t)((int32_t)T1);
 420   T0 = res >> 16;
 421 }
 422
 423 void OPPROTO op_addq_T0_T1(void)
 424 {
 425     uint64_t res;
 426     res = ((uint64_t)T1 << 32) | T0;
 427     res += ((uint64_t)(env->regs[PARAM2]) << 32) | (env->regs[PARAM1]);
 428     T1 = res >> 32;
 429     T0 = res;
 430 }
 431
 432 void OPPROTO op_addq_lo_T0_T1(void)
 433 {
 434     uint64_t res;
 435     res = ((uint64_t)T1 << 32) | T0;
 436     res += (uint64_t)(env->regs[PARAM1]);
 437     T1 = res >> 32;
 438     T0 = res;
 439 }
 440
 441 void OPPROTO op_logicq_cc(void)
 442 {
 443     env->NZF = (T1 & 0x80000000) | ((T0 | T1) != 0);
 444 }
 445
 446 /* memory access */
 447
 448 #define MEMSUFFIX _raw
 449 #include "op_mem.h"
 450
 451 #if !defined(CONFIG_USER_ONLY)
 452 #define MEMSUFFIX _user
 453 #include "op_mem.h"
 454 #define MEMSUFFIX _kernel
 455 #include "op_mem.h"
 456 #endif
 457
 458 /* shifts */
 459
 460 /* T1 based */
 461
 462 void OPPROTO op_shll_T1_im(void)
 463 {
 464     T1 = T1 << PARAM1;
 465 }
 466
 467 void OPPROTO op_shrl_T1_im(void)
 468 {
 469     T1 = (uint32_t)T1 >> PARAM1;
 470 }
 471
 472 void OPPROTO op_shrl_T1_0(void)
 473 {
 474     T1 = 0;
 475 }
 476
 477 void OPPROTO op_sarl_T1_im(void)
 478 {
 479     T1 = (int32_t)T1 >> PARAM1;
 480 }
 481
 482 void OPPROTO op_sarl_T1_0(void)
 483 {
 484     T1 = (int32_t)T1 >> 31;
 485 }
 486
 487 void OPPROTO op_rorl_T1_im(void)
 488 {
 489     int shift;
 490     shift = PARAM1;
 491     T1 = ((uint32_t)T1 >> shift) | (T1 << (32 - shift));
 492 }
 493
 494 void OPPROTO op_rrxl_T1(void)
 495 {
 496     T1 = ((uint32_t)T1 >> 1) | ((uint32_t)env->CF << 31);
 497 }
 498
 499 /* T1 based, set C flag */
 500 void OPPROTO op_shll_T1_im_cc(void)
 501 {
 502     env->CF = (T1 >> (32 - PARAM1)) & 1;
 503     T1 = T1 << PARAM1;
 504 }
 505
 506 void OPPROTO op_shrl_T1_im_cc(void)
 507 {
 508     env->CF = (T1 >> (PARAM1 - 1)) & 1;
 509     T1 = (uint32_t)T1 >> PARAM1;
 510 }
 511
 512 void OPPROTO op_shrl_T1_0_cc(void)
 513 {
 514     env->CF = (T1 >> 31) & 1;
 515     T1 = 0;
 516 }
 517
 518 void OPPROTO op_sarl_T1_im_cc(void)
 519 {
 520     env->CF = (T1 >> (PARAM1 - 1)) & 1;
 521     T1 = (int32_t)T1 >> PARAM1;
 522 }
 523
 524 void OPPROTO op_sarl_T1_0_cc(void)
 525 {
 526     env->CF = (T1 >> 31) & 1;
 527     T1 = (int32_t)T1 >> 31;
 528 }
 529
 530 void OPPROTO op_rorl_T1_im_cc(void)
 531 {
 532     int shift;
 533     shift = PARAM1;
 534     env->CF = (T1 >> (shift - 1)) & 1;
 535     T1 = ((uint32_t)T1 >> shift) | (T1 << (32 - shift));
 536 }
 537
 538 void OPPROTO op_rrxl_T1_cc(void)
 539 {
 540     uint32_t c;
 541     c = T1 & 1;
 542     T1 = ((uint32_t)T1 >> 1) | ((uint32_t)env->CF << 31);
 543     env->CF = c;
 544 }
 545
 546 /* T2 based */
 547 void OPPROTO op_shll_T2_im(void)
 548 {
 549     T2 = T2 << PARAM1;
 550 }
 551
 552 void OPPROTO op_shrl_T2_im(void)
 553 {
 554     T2 = (uint32_t)T2 >> PARAM1;
 555 }
 556
 557 void OPPROTO op_shrl_T2_0(void)
 558 {
 559     T2 = 0;
 560 }
 561
 562 void OPPROTO op_sarl_T2_im(void)
 563 {
 564     T2 = (int32_t)T2 >> PARAM1;
 565 }
 566
 567 void OPPROTO op_sarl_T2_0(void)
 568 {
 569     T2 = (int32_t)T2 >> 31;
 570 }
 571
 572 void OPPROTO op_rorl_T2_im(void)
 573 {
 574     int shift;
 575     shift = PARAM1;
 576     T2 = ((uint32_t)T2 >> shift) | (T2 << (32 - shift));
 577 }
 578
 579 void OPPROTO op_rrxl_T2(void)
 580 {
 581     T2 = ((uint32_t)T2 >> 1) | ((uint32_t)env->CF << 31);
 582 }
 583
 584 /* T1 based, use T0 as shift count */
 585
 586 void OPPROTO op_shll_T1_T0(void)
 587 {
 588     int shift;
 589     shift = T0 & 0xff;
 590     if (shift >= 32)
 591         T1 = 0;
 592     else
 593         T1 = T1 << shift;
 594     FORCE_RET();
 595 }
 596
 597 void OPPROTO op_shrl_T1_T0(void)
 598 {
 599     int shift;
 600     shift = T0 & 0xff;
 601     if (shift >= 32)
 602         T1 = 0;
 603     else
 604         T1 = (uint32_t)T1 >> shift;
 605     FORCE_RET();
 606 }
 607
 608 void OPPROTO op_sarl_T1_T0(void)
 609 {
 610     int shift;
 611     shift = T0 & 0xff;
 612     if (shift >= 32)
 613         shift = 31;
 614     T1 = (int32_t)T1 >> shift;
 615 }
 616
 617 void OPPROTO op_rorl_T1_T0(void)
 618 {
 619     int shift;
 620     shift = T0 & 0x1f;
 621     if (shift) {
 622         T1 = ((uint32_t)T1 >> shift) | (T1 << (32 - shift));
 623     }
 624     FORCE_RET();
 625 }
 626
 627 /* T1 based, use T0 as shift count and compute CF */
 628
 629 void OPPROTO op_shll_T1_T0_cc(void)
 630 {
 631     int shift;
 632     shift = T0 & 0xff;
 633     if (shift >= 32) {
 634         if (shift == 32)
 635             env->CF = T1 & 1;
 636         else
 637             env->CF = 0;
 638         T1 = 0;
 639     } else if (shift != 0) {
 640         env->CF = (T1 >> (32 - shift)) & 1;
 641         T1 = T1 << shift;
 642     }
 643     FORCE_RET();
 644 }
 645
 646 void OPPROTO op_shrl_T1_T0_cc(void)
 647 {
 648     int shift;
 649     shift = T0 & 0xff;
 650     if (shift >= 32) {
 651         if (shift == 32)
 652             env->CF = (T1 >> 31) & 1;
 653         else
 654             env->CF = 0;
 655         T1 = 0;
 656     } else if (shift != 0) {
 657         env->CF = (T1 >> (shift - 1)) & 1;
 658         T1 = (uint32_t)T1 >> shift;
 659     }
 660     FORCE_RET();
 661 }
 662
 663 void OPPROTO op_sarl_T1_T0_cc(void)
 664 {
 665     int shift;
 666     shift = T0 & 0xff;
 667     if (shift >= 32) {
 668         env->CF = (T1 >> 31) & 1;
 669         T1 = (int32_t)T1 >> 31;
 670     } else {
 671         env->CF = (T1 >> (shift - 1)) & 1;
 672         T1 = (int32_t)T1 >> shift;
 673     }
 674     FORCE_RET();
 675 }
 676
 677 void OPPROTO op_rorl_T1_T0_cc(void)
 678 {
 679     int shift1, shift;
 680     shift1 = T0 & 0xff;
 681     shift = shift1 & 0x1f;
 682     if (shift == 0) {
 683         if (shift1 != 0)
 684             env->CF = (T1 >> 31) & 1;
 685     } else {
 686         env->CF = (T1 >> (shift - 1)) & 1;
 687         T1 = ((uint32_t)T1 >> shift) | (T1 << (32 - shift));
 688     }
 689     FORCE_RET();
 690 }
 691
 692 /* misc */
 693 void OPPROTO op_clz_T0(void)
 694 {
 695     int count;
 696     for (count = 32; T0 > 0; count--)
 697         T0 = T0 >> 1;
 698     T0 = count;
 699     FORCE_RET();
 700 }
 701
 702 void OPPROTO op_sarl_T0_im(void)
 703 {
 704     T0 = (int32_t)T0 >> PARAM1;
 705 }
 706
 707 /* Sign/zero extend */
 708 void OPPROTO op_sxth_T0(void)
 709 {
 710   T0 = (int16_t)T0;
 711 }
 712
 713 void OPPROTO op_sxth_T1(void)
 714 {
 715   T1 = (int16_t)T1;
 716 }
 717
 718 void OPPROTO op_sxtb_T1(void)
 719 {
 720     T1 = (int8_t)T1;
 721 }
 722
 723 void OPPROTO op_uxtb_T1(void)
 724 {
 725     T1 = (uint8_t)T1;
 726 }
 727
 728 void OPPROTO op_uxth_T1(void)
 729 {
 730     T1 = (uint16_t)T1;
 731 }
 732
 733 void OPPROTO op_sxtb16_T1(void)
 734 {
 735     uint32_t res;
 736     res = (uint16_t)(int8_t)T1;
 737     res |= (uint32_t)(int8_t)(T1 >> 16) << 16;
 738     T1 = res;
 739 }
 740
 741 void OPPROTO op_uxtb16_T1(void)
 742 {
 743     uint32_t res;
 744     res = (uint16_t)(uint8_t)T1;
 745     res |= (uint32_t)(uint8_t)(T1 >> 16) << 16;
 746     T1 = res;
 747 }
 748
 749 #define SIGNBIT (uint32_t)0x80000000
 750 /* saturating arithmetic  */
 751 void OPPROTO op_addl_T0_T1_setq(void)
 752 {
 753   uint32_t res;
 754
 755   res = T0 + T1;
 756   if (((res ^ T0) & SIGNBIT) && !((T0 ^ T1) & SIGNBIT))
 757       env->QF = 1;
 758
 759   T0 = res;
 760   FORCE_RET();
 761 }
 762
 763 void OPPROTO op_addl_T0_T1_saturate(void)
 764 {
 765   uint32_t res;
 766
 767   res = T0 + T1;
 768   if (((res ^ T0) & SIGNBIT) && !((T0 ^ T1) & SIGNBIT)) {
 769       env->QF = 1;
 770       if (T0 & SIGNBIT)
 771           T0 = 0x80000000;
 772       else
 773           T0 = 0x7fffffff;
 774   }
 775   else
 776     T0 = res;
 777
 778   FORCE_RET();
 779 }
 780
 781 void OPPROTO op_subl_T0_T1_saturate(void)
 782 {
 783   uint32_t res;
 784
 785   res = T0 - T1;
 786   if (((res ^ T0) & SIGNBIT) && ((T0 ^ T1) & SIGNBIT)) {
 787       env->QF = 1;
 788       if (T0 & SIGNBIT)
 789           T0 = 0x8000000;
 790       else
 791           T0 = 0x7fffffff;
 792   }
 793   else
 794     T0 = res;
 795
 796   FORCE_RET();
 797 }
 798
 799 void OPPROTO op_double_T1_saturate(void)
 800 {
 801   int32_t val;
 802
 803   val = T1;
 804   if (val >= 0x40000000) {
 805       T1 = 0x7fffffff;
 806       env->QF = 1;
 807   } else if (val <= (int32_t)0xc0000000) {
 808       T1 = 0x80000000;
 809       env->QF = 1;
 810   } else {
 811       T1 = val << 1;
 812   }
 813   FORCE_RET();
 814 }
 815
 816 /* thumb shift by immediate */
 817 void OPPROTO op_shll_T0_im_thumb(void)
 818 {
 819     int shift;
 820     shift = PARAM1;
 821     if (shift != 0) {
 822         env->CF = (T1 >> (32 - shift)) & 1;
 823         T0 = T0 << shift;
 824     }
 825     env->NZF = T0;
 826     FORCE_RET();
 827 }
 828
 829 void OPPROTO op_shrl_T0_im_thumb(void)
 830 {
 831     int shift;
 832
 833     shift = PARAM1;
 834     if (shift == 0) {
 835         env->CF = ((uint32_t)shift) >> 31;
 836         T0 = 0;
 837     } else {
 838         env->CF = (T0 >> (shift - 1)) & 1;
 839         T0 = T0 >> shift;
 840     }
 841     env->NZF = T0;
 842     FORCE_RET();
 843 }
 844
 845 void OPPROTO op_sarl_T0_im_thumb(void)
 846 {
 847     int shift;
 848
 849     shift = PARAM1;
 850     if (shift == 0) {
 851         T0 = ((int32_t)T0) >> 31;
 852         env->CF = T0 & 1;
 853     } else {
 854         env->CF = (T0 >> (shift - 1)) & 1;
 855         T0 = ((int32_t)T0) >> shift;
 856     }
 857     env->NZF = T0;
 858     FORCE_RET();
 859 }
 860
 861 /* exceptions */
 862
 863 void OPPROTO op_swi(void)
 864 {
 865     env->exception_index = EXCP_SWI;
 866     cpu_loop_exit();
 867 }
 868
 869 void OPPROTO op_undef_insn(void)
 870 {
 871     env->exception_index = EXCP_UDEF;
 872     cpu_loop_exit();
 873 }
 874
 875 void OPPROTO op_debug(void)
 876 {
 877     env->exception_index = EXCP_DEBUG;
 878     cpu_loop_exit();
 879 }
 880
 881 void OPPROTO op_wfi(void)
 882 {
 883     env->exception_index = EXCP_HLT;
 884     env->halted = 1;
 885     cpu_loop_exit();
 886 }
 887
 888 void OPPROTO op_bkpt(void)
 889 {
 890     env->exception_index = EXCP_BKPT;
 891     cpu_loop_exit();
 892 }
 893
 894 /* VFP support.  We follow the convention used for VFP instrunctions:
 895    Single precition routines have a "s" suffix, double precision a
 896    "d" suffix.  */
 897
 898 #define VFP_OP(name, p) void OPPROTO op_vfp_##name##p(void)
 899
 900 #define VFP_BINOP(name) \
 901 VFP_OP(name, s)             \
 902 {                           \
 903     FT0s = float32_ ## name (FT0s, FT1s, &env->vfp.fp_status);    \
 904 }                           \
 905 VFP_OP(name, d)             \
 906 {                           \
 907     FT0d = float64_ ## name (FT0d, FT1d, &env->vfp.fp_status);    \
 908 }
 909 VFP_BINOP(add)
 910 VFP_BINOP(sub)
 911 VFP_BINOP(mul)
 912 VFP_BINOP(div)
 913 #undef VFP_BINOP
 914
 915 #define VFP_HELPER(name)  \
 916 VFP_OP(name, s)           \
 917 {                         \
 918     do_vfp_##name##s();    \
 919 }                         \
 920 VFP_OP(name, d)           \
 921 {                         \
 922     do_vfp_##name##d();    \
 923 }
 924 VFP_HELPER(abs)
 925 VFP_HELPER(sqrt)
 926 VFP_HELPER(cmp)
 927 VFP_HELPER(cmpe)
 928 #undef VFP_HELPER
 929
 930 /* XXX: Will this do the right thing for NANs.  Should invert the signbit
 931    without looking at the rest of the value.  */
 932 VFP_OP(neg, s)
 933 {
 934     FT0s = float32_chs(FT0s);
 935 }
 936
 937 VFP_OP(neg, d)
 938 {
 939     FT0d = float64_chs(FT0d);
 940 }
 941
 942 VFP_OP(F1_ld0, s)
 943 {
 944     union {
 945         uint32_t i;
 946         float32 s;
 947     } v;
 948     v.i = 0;
 949     FT1s = v.s;
 950 }
 951
 952 VFP_OP(F1_ld0, d)
 953 {
 954     union {
 955         uint64_t i;
 956         float64 d;
 957     } v;
 958     v.i = 0;
 959     FT1d = v.d;
 960 }
 961
 962 /* Helper routines to perform bitwise copies between float and int.  */
 963 static inline float32 vfp_itos(uint32_t i)
 964 {
 965     union {
 966         uint32_t i;
 967         float32 s;
 968     } v;
 969
 970     v.i = i;
 971     return v.s;
 972 }
 973
 974 static inline uint32_t vfp_stoi(float32 s)
 975 {
 976     union {
 977         uint32_t i;
 978         float32 s;
 979     } v;
 980
 981     v.s = s;
 982     return v.i;
 983 }
 984
 985 /* Integer to float conversion.  */
 986 VFP_OP(uito, s)
 987 {
 988     FT0s = uint32_to_float32(vfp_stoi(FT0s), &env->vfp.fp_status);
 989 }
 990
 991 VFP_OP(uito, d)
 992 {
 993     FT0d = uint32_to_float64(vfp_stoi(FT0s), &env->vfp.fp_status);
 994 }
 995
 996 VFP_OP(sito, s)
 997 {
 998     FT0s = int32_to_float32(vfp_stoi(FT0s), &env->vfp.fp_status);
 999 }
1000
1001 VFP_OP(sito, d)
1002 {
1003     FT0d = int32_to_float64(vfp_stoi(FT0s), &env->vfp.fp_status);
1004 }
1005
1006 /* Float to integer conversion.  */
1007 VFP_OP(toui, s)
1008 {
1009     FT0s = vfp_itos(float32_to_uint32(FT0s, &env->vfp.fp_status));
1010 }
1011
1012 VFP_OP(toui, d)
1013 {
1014     FT0s = vfp_itos(float64_to_uint32(FT0d, &env->vfp.fp_status));
1015 }
1016
1017 VFP_OP(tosi, s)
1018 {
1019     FT0s = vfp_itos(float32_to_int32(FT0s, &env->vfp.fp_status));
1020 }
1021
1022 VFP_OP(tosi, d)
1023 {
1024     FT0s = vfp_itos(float64_to_int32(FT0d, &env->vfp.fp_status));
1025 }
1026
1027 /* TODO: Set rounding mode properly.  */
1028 VFP_OP(touiz, s)
1029 {
1030     FT0s = vfp_itos(float32_to_uint32_round_to_zero(FT0s, &env->vfp.fp_status));
1031 }
1032
1033 VFP_OP(touiz, d)
1034 {
1035     FT0s = vfp_itos(float64_to_uint32_round_to_zero(FT0d, &env->vfp.fp_status));
1036 }
1037
1038 VFP_OP(tosiz, s)
1039 {
1040     FT0s = vfp_itos(float32_to_int32_round_to_zero(FT0s, &env->vfp.fp_status));
1041 }
1042
1043 VFP_OP(tosiz, d)
1044 {
1045     FT0s = vfp_itos(float64_to_int32_round_to_zero(FT0d, &env->vfp.fp_status));
1046 }
1047
1048 /* floating point conversion */
1049 VFP_OP(fcvtd, s)
1050 {
1051     FT0d = float32_to_float64(FT0s, &env->vfp.fp_status);
1052 }
1053
1054 VFP_OP(fcvts, d)
1055 {
1056     FT0s = float64_to_float32(FT0d, &env->vfp.fp_status);
1057 }
1058
1059 /* Get and Put values from registers.  */
1060 VFP_OP(getreg_F0, d)
1061 {
1062   FT0d = *(float64 *)((char *) env + PARAM1);
1063 }
1064
1065 VFP_OP(getreg_F0, s)
1066 {
1067   FT0s = *(float32 *)((char *) env + PARAM1);
1068 }
1069
1070 VFP_OP(getreg_F1, d)
1071 {
1072   FT1d = *(float64 *)((char *) env + PARAM1);
1073 }
1074
1075 VFP_OP(getreg_F1, s)
1076 {
1077   FT1s = *(float32 *)((char *) env + PARAM1);
1078 }
1079
1080 VFP_OP(setreg_F0, d)
1081 {
1082   *(float64 *)((char *) env + PARAM1) = FT0d;
1083 }
1084
1085 VFP_OP(setreg_F0, s)
1086 {
1087   *(float32 *)((char *) env + PARAM1) = FT0s;
1088 }
1089
1090 void OPPROTO op_vfp_movl_T0_fpscr(void)
1091 {
1092     do_vfp_get_fpscr ();
1093 }
1094
1095 void OPPROTO op_vfp_movl_T0_fpscr_flags(void)
1096 {
1097     T0 = env->vfp.xregs[ARM_VFP_FPSCR] & (0xf << 28);
1098 }
1099
1100 void OPPROTO op_vfp_movl_fpscr_T0(void)
1101 {
1102     do_vfp_set_fpscr();
1103 }
1104
1105 void OPPROTO op_vfp_movl_T0_xreg(void)
1106 {
1107     T0 = env->vfp.xregs[PARAM1];
1108 }
1109
1110 void OPPROTO op_vfp_movl_xreg_T0(void)
1111 {
1112     env->vfp.xregs[PARAM1] = T0;
1113 }
1114
1115 /* Move between FT0s to T0  */
1116 void OPPROTO op_vfp_mrs(void)
1117 {
1118     T0 = vfp_stoi(FT0s);
1119 }
1120
1121 void OPPROTO op_vfp_msr(void)
1122 {
1123     FT0s = vfp_itos(T0);
1124 }
1125
1126 /* Move between FT0d and {T0,T1} */
1127 void OPPROTO op_vfp_mrrd(void)
1128 {
1129     CPU_DoubleU u;
1130
1131     u.d = FT0d;
1132     T0 = u.l.lower;
1133     T1 = u.l.upper;
1134 }
1135
1136 void OPPROTO op_vfp_mdrr(void)
1137 {
1138     CPU_DoubleU u;
1139
1140     u.l.lower = T0;
1141     u.l.upper = T1;
1142     FT0d = u.d;
1143 }
1144
1145 /* Copy the most significant bit to T0 to all bits of T1.  */
1146 void OPPROTO op_signbit_T1_T0(void)
1147 {
1148     T1 = (int32_t)T0 >> 31;
1149 }
1150
1151 void OPPROTO op_movl_cp15_T0(void)
1152 {
1153     helper_set_cp15(env, PARAM1, T0);
1154     FORCE_RET();
1155 }
1156
1157 void OPPROTO op_movl_T0_cp15(void)
1158 {
1159     T0 = helper_get_cp15(env, PARAM1);
1160     FORCE_RET();
1161 }
1162
1163 /* Access to user mode registers from privileged modes.  */
1164 void OPPROTO op_movl_T0_user(void)
1165 {
1166     int regno = PARAM1;
1167     if (regno == 13) {
1168         T0 = env->banked_r13[0];
1169     } else if (regno == 14) {
1170         T0 = env->banked_r14[0];
1171     } else if ((env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
1172         T0 = env->usr_regs[regno - 8];
1173     } else {
1174         T0 = env->regs[regno];
1175     }
1176     FORCE_RET();
1177 }
1178
1179
1180 void OPPROTO op_movl_user_T0(void)
1181 {
1182     int regno = PARAM1;
1183     if (regno == 13) {
1184         env->banked_r13[0] = T0;
1185     } else if (regno == 14) {
1186         env->banked_r14[0] = T0;
1187     } else if ((env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
1188         env->usr_regs[regno - 8] = T0;
1189     } else {
1190         env->regs[regno] = T0;
1191     }
1192     FORCE_RET();
1193 }
1194
1195 void OPPROTO op_movl_T2_T0(void)
1196 {
1197     T2 = T0;
1198 }
1199
1200 void OPPROTO op_movl_T0_T2(void)
1201 {
1202     T0 = T2;
1203 }