sljit/sljitNativeARM_32.c

   1 /*
   2  *    Stack-less Just-In-Time compiler
   3  *
   4  *    Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without modification, are
   7  * permitted provided that the following conditions are met:
   8  *
   9  *   1. Redistributions of source code must retain the above copyright notice, this list of
  10  *      conditions and the following disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above copyright notice, this list
  13  *      of conditions and the following disclaimer in the documentation and/or other materials
  14  *      provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  19  * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  21  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  22  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 SLJIT_API_FUNC_ATTRIBUTE SLJIT_CONST char* sljit_get_platform_name(void)
  28 {
  29 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
  30         return "ARMv7" SLJIT_CPUINFO;
  31 #elif (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
  32         return "ARMv5" SLJIT_CPUINFO;
  33 #else
  34 #error "Internal error: Unknown ARM architecture"
  35 #endif
  36 }
  37
  38 /* Last register + 1. */
  39 #define TMP_REG1        (SLJIT_NUMBER_OF_REGISTERS + 2)
  40 #define TMP_REG2        (SLJIT_NUMBER_OF_REGISTERS + 3)
  41 #define TMP_REG3        (SLJIT_NUMBER_OF_REGISTERS + 4)
  42 #define TMP_PC          (SLJIT_NUMBER_OF_REGISTERS + 5)
  43
  44 #define TMP_FREG1       (0)
  45 #define TMP_FREG2       (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
  46
  47 /* In ARM instruction words.
  48    Cache lines are usually 32 byte aligned. */
  49 #define CONST_POOL_ALIGNMENT    8
  50 #define CONST_POOL_EMPTY        0xffffffff
  51
  52 #define ALIGN_INSTRUCTION(ptr) \
  53         (sljit_uw*)(((sljit_uw)(ptr) + (CONST_POOL_ALIGNMENT * sizeof(sljit_uw)) - 1) & ~((CONST_POOL_ALIGNMENT * sizeof(sljit_uw)) - 1))
  54 #define MAX_DIFFERENCE(max_diff) \
  55         (((max_diff) / (sljit_si)sizeof(sljit_uw)) - (CONST_POOL_ALIGNMENT - 1))
  56
  57 /* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
  58 static SLJIT_CONST sljit_ub reg_map[SLJIT_NUMBER_OF_REGISTERS + 6] = {
  59         0, 0, 1, 2, 11, 10, 9, 8, 7, 6, 5, 4, 13, 3, 12, 14, 15
  60 };
  61
  62 #define RM(rm) (reg_map[rm])
  63 #define RD(rd) (reg_map[rd] << 12)
  64 #define RN(rn) (reg_map[rn] << 16)
  65
  66 /* --------------------------------------------------------------------- */
  67 /*  Instrucion forms                                                     */
  68 /* --------------------------------------------------------------------- */
  69
  70 /* The instruction includes the AL condition.
  71    INST_NAME - CONDITIONAL remove this flag. */
  72 #define COND_MASK       0xf0000000
  73 #define CONDITIONAL     0xe0000000
  74 #define PUSH_POOL       0xff000000
  75
  76 /* DP - Data Processing instruction (use with EMIT_DATA_PROCESS_INS). */
  77 #define ADC_DP          0x5
  78 #define ADD_DP          0x4
  79 #define AND_DP          0x0
  80 #define B               0xea000000
  81 #define BIC_DP          0xe
  82 #define BL              0xeb000000
  83 #define BLX             0xe12fff30
  84 #define BX              0xe12fff10
  85 #define CLZ             0xe16f0f10
  86 #define CMP_DP          0xa
  87 #define BKPT            0xe1200070
  88 #define EOR_DP          0x1
  89 #define MOV_DP          0xd
  90 #define MUL             0xe0000090
  91 #define MVN_DP          0xf
  92 #define NOP             0xe1a00000
  93 #define ORR_DP          0xc
  94 #define PUSH            0xe92d0000
  95 #define POP             0xe8bd0000
  96 #define RSB_DP          0x3
  97 #define RSC_DP          0x7
  98 #define SBC_DP          0x6
  99 #define SMULL           0xe0c00090
 100 #define SUB_DP          0x2
 101 #define UMULL           0xe0800090
 102 #define VABS_F32        0xeeb00ac0
 103 #define VADD_F32        0xee300a00
 104 #define VCMP_F32        0xeeb40a40
 105 #define VCVT_F32_S32    0xeeb80ac0
 106 #define VCVT_F64_F32    0xeeb70ac0
 107 #define VCVT_S32_F32    0xeebd0ac0
 108 #define VDIV_F32        0xee800a00
 109 #define VMOV_F32        0xeeb00a40
 110 #define VMOV            0xee000a10
 111 #define VMRS            0xeef1fa10
 112 #define VMUL_F32        0xee200a00
 113 #define VNEG_F32        0xeeb10a40
 114 #define VSTR_F32        0xed000a00
 115 #define VSUB_F32        0xee300a40
 116
 117 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
 118 /* Arm v7 specific instructions. */
 119 #define MOVW            0xe3000000
 120 #define MOVT            0xe3400000
 121 #define SXTB            0xe6af0070
 122 #define SXTH            0xe6bf0070
 123 #define UXTB            0xe6ef0070
 124 #define UXTH            0xe6ff0070
 125 #endif
 126
 127 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 128
 129 static sljit_si push_cpool(struct sljit_compiler *compiler)
 130 {
 131         /* Pushing the constant pool into the instruction stream. */
 132         sljit_uw* inst;
 133         sljit_uw* cpool_ptr;
 134         sljit_uw* cpool_end;
 135         sljit_si i;
 136
 137         /* The label could point the address after the constant pool. */
 138         if (compiler->last_label && compiler->last_label->size == compiler->size)
 139                 compiler->last_label->size += compiler->cpool_fill + (CONST_POOL_ALIGNMENT - 1) + 1;
 140
 141         SLJIT_ASSERT(compiler->cpool_fill > 0 && compiler->cpool_fill <= CPOOL_SIZE);
 142         inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 143         FAIL_IF(!inst);
 144         compiler->size++;
 145         *inst = 0xff000000 | compiler->cpool_fill;
 146
 147         for (i = 0; i < CONST_POOL_ALIGNMENT - 1; i++) {
 148                 inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 149                 FAIL_IF(!inst);
 150                 compiler->size++;
 151                 *inst = 0;
 152         }
 153
 154         cpool_ptr = compiler->cpool;
 155         cpool_end = cpool_ptr + compiler->cpool_fill;
 156         while (cpool_ptr < cpool_end) {
 157                 inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 158                 FAIL_IF(!inst);
 159                 compiler->size++;
 160                 *inst = *cpool_ptr++;
 161         }
 162         compiler->cpool_diff = CONST_POOL_EMPTY;
 163         compiler->cpool_fill = 0;
 164         return SLJIT_SUCCESS;
 165 }
 166
 167 static sljit_si push_inst(struct sljit_compiler *compiler, sljit_uw inst)
 168 {
 169         sljit_uw* ptr;
 170
 171         if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)))
 172                 FAIL_IF(push_cpool(compiler));
 173
 174         ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 175         FAIL_IF(!ptr);
 176         compiler->size++;
 177         *ptr = inst;
 178         return SLJIT_SUCCESS;
 179 }
 180
 181 static sljit_si push_inst_with_literal(struct sljit_compiler *compiler, sljit_uw inst, sljit_uw literal)
 182 {
 183         sljit_uw* ptr;
 184         sljit_uw cpool_index = CPOOL_SIZE;
 185         sljit_uw* cpool_ptr;
 186         sljit_uw* cpool_end;
 187         sljit_ub* cpool_unique_ptr;
 188
 189         if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)))
 190                 FAIL_IF(push_cpool(compiler));
 191         else if (compiler->cpool_fill > 0) {
 192                 cpool_ptr = compiler->cpool;
 193                 cpool_end = cpool_ptr + compiler->cpool_fill;
 194                 cpool_unique_ptr = compiler->cpool_unique;
 195                 do {
 196                         if ((*cpool_ptr == literal) && !(*cpool_unique_ptr)) {
 197                                 cpool_index = cpool_ptr - compiler->cpool;
 198                                 break;
 199                         }
 200                         cpool_ptr++;
 201                         cpool_unique_ptr++;
 202                 } while (cpool_ptr < cpool_end);
 203         }
 204
 205         if (cpool_index == CPOOL_SIZE) {
 206                 /* Must allocate a new entry in the literal pool. */
 207                 if (compiler->cpool_fill < CPOOL_SIZE) {
 208                         cpool_index = compiler->cpool_fill;
 209                         compiler->cpool_fill++;
 210                 }
 211                 else {
 212                         FAIL_IF(push_cpool(compiler));
 213                         cpool_index = 0;
 214                         compiler->cpool_fill = 1;
 215                 }
 216         }
 217
 218         SLJIT_ASSERT((inst & 0xfff) == 0);
 219         ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 220         FAIL_IF(!ptr);
 221         compiler->size++;
 222         *ptr = inst | cpool_index;
 223
 224         compiler->cpool[cpool_index] = literal;
 225         compiler->cpool_unique[cpool_index] = 0;
 226         if (compiler->cpool_diff == CONST_POOL_EMPTY)
 227                 compiler->cpool_diff = compiler->size;
 228         return SLJIT_SUCCESS;
 229 }
 230
 231 static sljit_si push_inst_with_unique_literal(struct sljit_compiler *compiler, sljit_uw inst, sljit_uw literal)
 232 {
 233         sljit_uw* ptr;
 234         if (SLJIT_UNLIKELY((compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)) || compiler->cpool_fill >= CPOOL_SIZE))
 235                 FAIL_IF(push_cpool(compiler));
 236
 237         SLJIT_ASSERT(compiler->cpool_fill < CPOOL_SIZE && (inst & 0xfff) == 0);
 238         ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 239         FAIL_IF(!ptr);
 240         compiler->size++;
 241         *ptr = inst | compiler->cpool_fill;
 242
 243         compiler->cpool[compiler->cpool_fill] = literal;
 244         compiler->cpool_unique[compiler->cpool_fill] = 1;
 245         compiler->cpool_fill++;
 246         if (compiler->cpool_diff == CONST_POOL_EMPTY)
 247                 compiler->cpool_diff = compiler->size;
 248         return SLJIT_SUCCESS;
 249 }
 250
 251 static SLJIT_INLINE sljit_si prepare_blx(struct sljit_compiler *compiler)
 252 {
 253         /* Place for at least two instruction (doesn't matter whether the first has a literal). */
 254         if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4088)))
 255                 return push_cpool(compiler);
 256         return SLJIT_SUCCESS;
 257 }
 258
 259 static SLJIT_INLINE sljit_si emit_blx(struct sljit_compiler *compiler)
 260 {
 261         /* Must follow tightly the previous instruction (to be able to convert it to bl instruction). */
 262         SLJIT_ASSERT(compiler->cpool_diff == CONST_POOL_EMPTY || compiler->size - compiler->cpool_diff < MAX_DIFFERENCE(4092));
 263         return push_inst(compiler, BLX | RM(TMP_REG1));
 264 }
 265
 266 static sljit_uw patch_pc_relative_loads(sljit_uw *last_pc_patch, sljit_uw *code_ptr, sljit_uw* const_pool, sljit_uw cpool_size)
 267 {
 268         sljit_uw diff;
 269         sljit_uw ind;
 270         sljit_uw counter = 0;
 271         sljit_uw* clear_const_pool = const_pool;
 272         sljit_uw* clear_const_pool_end = const_pool + cpool_size;
 273
 274         SLJIT_ASSERT(const_pool - code_ptr <= CONST_POOL_ALIGNMENT);
 275         /* Set unused flag for all literals in the constant pool.
 276            I.e.: unused literals can belong to branches, which can be encoded as B or BL.
 277            We can "compress" the constant pool by discarding these literals. */
 278         while (clear_const_pool < clear_const_pool_end)
 279                 *clear_const_pool++ = (sljit_uw)(-1);
 280
 281         while (last_pc_patch < code_ptr) {
 282                 /* Data transfer instruction with Rn == r15. */
 283                 if ((*last_pc_patch & 0x0c0f0000) == 0x040f0000) {
 284                         diff = const_pool - last_pc_patch;
 285                         ind = (*last_pc_patch) & 0xfff;
 286
 287                         /* Must be a load instruction with immediate offset. */
 288                         SLJIT_ASSERT(ind < cpool_size && !(*last_pc_patch & (1 << 25)) && (*last_pc_patch & (1 << 20)));
 289                         if ((sljit_si)const_pool[ind] < 0) {
 290                                 const_pool[ind] = counter;
 291                                 ind = counter;
 292                                 counter++;
 293                         }
 294                         else
 295                                 ind = const_pool[ind];
 296
 297                         SLJIT_ASSERT(diff >= 1);
 298                         if (diff >= 2 || ind > 0) {
 299                                 diff = (diff + ind - 2) << 2;
 300                                 SLJIT_ASSERT(diff <= 0xfff);
 301                                 *last_pc_patch = (*last_pc_patch & ~0xfff) | diff;
 302                         }
 303                         else
 304                                 *last_pc_patch = (*last_pc_patch & ~(0xfff | (1 << 23))) | 0x004;
 305                 }
 306                 last_pc_patch++;
 307         }
 308         return counter;
 309 }
 310
 311 /* In some rare ocasions we may need future patches. The probability is close to 0 in practice. */
 312 struct future_patch {
 313         struct future_patch* next;
 314         sljit_si index;
 315         sljit_si value;
 316 };
 317
 318 static sljit_si resolve_const_pool_index(struct sljit_compiler *compiler, struct future_patch **first_patch, sljit_uw cpool_current_index, sljit_uw *cpool_start_address, sljit_uw *buf_ptr)
 319 {
 320         sljit_si value;
 321         struct future_patch *curr_patch, *prev_patch;
 322
 323         SLJIT_UNUSED_ARG(compiler);
 324
 325         /* Using the values generated by patch_pc_relative_loads. */
 326         if (!*first_patch)
 327                 value = (sljit_si)cpool_start_address[cpool_current_index];
 328         else {
 329                 curr_patch = *first_patch;
 330                 prev_patch = 0;
 331                 while (1) {
 332                         if (!curr_patch) {
 333                                 value = (sljit_si)cpool_start_address[cpool_current_index];
 334                                 break;
 335                         }
 336                         if ((sljit_uw)curr_patch->index == cpool_current_index) {
 337                                 value = curr_patch->value;
 338                                 if (prev_patch)
 339                                         prev_patch->next = curr_patch->next;
 340                                 else
 341                                         *first_patch = curr_patch->next;
 342                                 SLJIT_FREE(curr_patch, compiler->allocator_data);
 343                                 break;
 344                         }
 345                         prev_patch = curr_patch;
 346                         curr_patch = curr_patch->next;
 347                 }
 348         }
 349
 350         if (value >= 0) {
 351                 if ((sljit_uw)value > cpool_current_index) {
 352                         curr_patch = (struct future_patch*)SLJIT_MALLOC(sizeof(struct future_patch), compiler->allocator_data);
 353                         if (!curr_patch) {
 354                                 while (*first_patch) {
 355                                         curr_patch = *first_patch;
 356                                         *first_patch = (*first_patch)->next;
 357                                         SLJIT_FREE(curr_patch, compiler->allocator_data);
 358                                 }
 359                                 return SLJIT_ERR_ALLOC_FAILED;
 360                         }
 361                         curr_patch->next = *first_patch;
 362                         curr_patch->index = value;
 363                         curr_patch->value = cpool_start_address[value];
 364                         *first_patch = curr_patch;
 365                 }
 366                 cpool_start_address[value] = *buf_ptr;
 367         }
 368         return SLJIT_SUCCESS;
 369 }
 370
 371 #else
 372
 373 static sljit_si push_inst(struct sljit_compiler *compiler, sljit_uw inst)
 374 {
 375         sljit_uw* ptr;
 376
 377         ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
 378         FAIL_IF(!ptr);
 379         compiler->size++;
 380         *ptr = inst;
 381         return SLJIT_SUCCESS;
 382 }
 383
 384 static SLJIT_INLINE sljit_si emit_imm(struct sljit_compiler *compiler, sljit_si reg, sljit_sw imm)
 385 {
 386         FAIL_IF(push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff)));
 387         return push_inst(compiler, MOVT | RD(reg) | ((imm >> 12) & 0xf0000) | ((imm >> 16) & 0xfff));
 388 }
 389
 390 #endif
 391
 392 static SLJIT_INLINE sljit_si detect_jump_type(struct sljit_jump *jump, sljit_uw *code_ptr, sljit_uw *code)
 393 {
 394         sljit_sw diff;
 395
 396         if (jump->flags & SLJIT_REWRITABLE_JUMP)
 397                 return 0;
 398
 399 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 400         if (jump->flags & IS_BL)
 401                 code_ptr--;
 402
 403         if (jump->flags & JUMP_ADDR)
 404                 diff = ((sljit_sw)jump->u.target - (sljit_sw)(code_ptr + 2));
 405         else {
 406                 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
 407                 diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)(code_ptr + 2));
 408         }
 409
 410         /* Branch to Thumb code has not been optimized yet. */
 411         if (diff & 0x3)
 412                 return 0;
 413
 414         if (jump->flags & IS_BL) {
 415                 if (diff <= 0x01ffffff && diff >= -0x02000000) {
 416                         *code_ptr = (BL - CONDITIONAL) | (*(code_ptr + 1) & COND_MASK);
 417                         jump->flags |= PATCH_B;
 418                         return 1;
 419                 }
 420         }
 421         else {
 422                 if (diff <= 0x01ffffff && diff >= -0x02000000) {
 423                         *code_ptr = (B - CONDITIONAL) | (*code_ptr & COND_MASK);
 424                         jump->flags |= PATCH_B;
 425                 }
 426         }
 427 #else
 428         if (jump->flags & JUMP_ADDR)
 429                 diff = ((sljit_sw)jump->u.target - (sljit_sw)code_ptr);
 430         else {
 431                 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
 432                 diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)code_ptr);
 433         }
 434
 435         /* Branch to Thumb code has not been optimized yet. */
 436         if (diff & 0x3)
 437                 return 0;
 438
 439         if (diff <= 0x01ffffff && diff >= -0x02000000) {
 440                 code_ptr -= 2;
 441                 *code_ptr = ((jump->flags & IS_BL) ? (BL - CONDITIONAL) : (B - CONDITIONAL)) | (code_ptr[2] & COND_MASK);
 442                 jump->flags |= PATCH_B;
 443                 return 1;
 444         }
 445 #endif
 446         return 0;
 447 }
 448
 449 static SLJIT_INLINE void inline_set_jump_addr(sljit_uw addr, sljit_uw new_addr, sljit_si flush)
 450 {
 451 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 452         sljit_uw *ptr = (sljit_uw*)addr;
 453         sljit_uw *inst = (sljit_uw*)ptr[0];
 454         sljit_uw mov_pc = ptr[1];
 455         sljit_si bl = (mov_pc & 0x0000f000) != RD(TMP_PC);
 456         sljit_sw diff = (sljit_sw)(((sljit_sw)new_addr - (sljit_sw)(inst + 2)) >> 2);
 457
 458         if (diff <= 0x7fffff && diff >= -0x800000) {
 459                 /* Turn to branch. */
 460                 if (!bl) {
 461                         inst[0] = (mov_pc & COND_MASK) | (B - CONDITIONAL) | (diff & 0xffffff);
 462                         if (flush) {
 463                                 SLJIT_CACHE_FLUSH(inst, inst + 1);
 464                         }
 465                 } else {
 466                         inst[0] = (mov_pc & COND_MASK) | (BL - CONDITIONAL) | (diff & 0xffffff);
 467                         inst[1] = NOP;
 468                         if (flush) {
 469                                 SLJIT_CACHE_FLUSH(inst, inst + 2);
 470                         }
 471                 }
 472         } else {
 473                 /* Get the position of the constant. */
 474                 if (mov_pc & (1 << 23))
 475                         ptr = inst + ((mov_pc & 0xfff) >> 2) + 2;
 476                 else
 477                         ptr = inst + 1;
 478
 479                 if (*inst != mov_pc) {
 480                         inst[0] = mov_pc;
 481                         if (!bl) {
 482                                 if (flush) {
 483                                         SLJIT_CACHE_FLUSH(inst, inst + 1);
 484                                 }
 485                         } else {
 486                                 inst[1] = BLX | RM(TMP_REG1);
 487                                 if (flush) {
 488                                         SLJIT_CACHE_FLUSH(inst, inst + 2);
 489                                 }
 490                         }
 491                 }
 492                 *ptr = new_addr;
 493         }
 494 #else
 495         sljit_uw *inst = (sljit_uw*)addr;
 496         SLJIT_ASSERT((inst[0] & 0xfff00000) == MOVW && (inst[1] & 0xfff00000) == MOVT);
 497         inst[0] = MOVW | (inst[0] & 0xf000) | ((new_addr << 4) & 0xf0000) | (new_addr & 0xfff);
 498         inst[1] = MOVT | (inst[1] & 0xf000) | ((new_addr >> 12) & 0xf0000) | ((new_addr >> 16) & 0xfff);
 499         if (flush) {
 500                 SLJIT_CACHE_FLUSH(inst, inst + 2);
 501         }
 502 #endif
 503 }
 504
 505 static sljit_uw get_imm(sljit_uw imm);
 506
 507 static SLJIT_INLINE void inline_set_const(sljit_uw addr, sljit_sw new_constant, sljit_si flush)
 508 {
 509 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 510         sljit_uw *ptr = (sljit_uw*)addr;
 511         sljit_uw *inst = (sljit_uw*)ptr[0];
 512         sljit_uw ldr_literal = ptr[1];
 513         sljit_uw src2;
 514
 515         src2 = get_imm(new_constant);
 516         if (src2) {
 517                 *inst = 0xe3a00000 | (ldr_literal & 0xf000) | src2;
 518                 if (flush) {
 519                         SLJIT_CACHE_FLUSH(inst, inst + 1);
 520                 }
 521                 return;
 522         }
 523
 524         src2 = get_imm(~new_constant);
 525         if (src2) {
 526                 *inst = 0xe3e00000 | (ldr_literal & 0xf000) | src2;
 527                 if (flush) {
 528                         SLJIT_CACHE_FLUSH(inst, inst + 1);
 529                 }
 530                 return;
 531         }
 532
 533         if (ldr_literal & (1 << 23))
 534                 ptr = inst + ((ldr_literal & 0xfff) >> 2) + 2;
 535         else
 536                 ptr = inst + 1;
 537
 538         if (*inst != ldr_literal) {
 539                 *inst = ldr_literal;
 540                 if (flush) {
 541                         SLJIT_CACHE_FLUSH(inst, inst + 1);
 542                 }
 543         }
 544         *ptr = new_constant;
 545 #else
 546         sljit_uw *inst = (sljit_uw*)addr;
 547         SLJIT_ASSERT((inst[0] & 0xfff00000) == MOVW && (inst[1] & 0xfff00000) == MOVT);
 548         inst[0] = MOVW | (inst[0] & 0xf000) | ((new_constant << 4) & 0xf0000) | (new_constant & 0xfff);
 549         inst[1] = MOVT | (inst[1] & 0xf000) | ((new_constant >> 12) & 0xf0000) | ((new_constant >> 16) & 0xfff);
 550         if (flush) {
 551                 SLJIT_CACHE_FLUSH(inst, inst + 2);
 552         }
 553 #endif
 554 }
 555
 556 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
 557 {
 558         struct sljit_memory_fragment *buf;
 559         sljit_uw *code;
 560         sljit_uw *code_ptr;
 561         sljit_uw *buf_ptr;
 562         sljit_uw *buf_end;
 563         sljit_uw size;
 564         sljit_uw word_count;
 565 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 566         sljit_uw cpool_size;
 567         sljit_uw cpool_skip_alignment;
 568         sljit_uw cpool_current_index;
 569         sljit_uw *cpool_start_address;
 570         sljit_uw *last_pc_patch;
 571         struct future_patch *first_patch;
 572 #endif
 573
 574         struct sljit_label *label;
 575         struct sljit_jump *jump;
 576         struct sljit_const *const_;
 577
 578         CHECK_ERROR_PTR();
 579         CHECK_PTR(check_sljit_generate_code(compiler));
 580         reverse_buf(compiler);
 581
 582         /* Second code generation pass. */
 583 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 584         size = compiler->size + (compiler->patches << 1);
 585         if (compiler->cpool_fill > 0)
 586                 size += compiler->cpool_fill + CONST_POOL_ALIGNMENT - 1;
 587 #else
 588         size = compiler->size;
 589 #endif
 590         code = (sljit_uw*)SLJIT_MALLOC_EXEC(size * sizeof(sljit_uw));
 591         PTR_FAIL_WITH_EXEC_IF(code);
 592         buf = compiler->buf;
 593
 594 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 595         cpool_size = 0;
 596         cpool_skip_alignment = 0;
 597         cpool_current_index = 0;
 598         cpool_start_address = NULL;
 599         first_patch = NULL;
 600         last_pc_patch = code;
 601 #endif
 602
 603         code_ptr = code;
 604         word_count = 0;
 605
 606         label = compiler->labels;
 607         jump = compiler->jumps;
 608         const_ = compiler->consts;
 609
 610         if (label && label->size == 0) {
 611                 label->addr = (sljit_uw)code;
 612                 label->size = 0;
 613                 label = label->next;
 614         }
 615
 616         do {
 617                 buf_ptr = (sljit_uw*)buf->memory;
 618                 buf_end = buf_ptr + (buf->used_size >> 2);
 619                 do {
 620                         word_count++;
 621 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 622                         if (cpool_size > 0) {
 623                                 if (cpool_skip_alignment > 0) {
 624                                         buf_ptr++;
 625                                         cpool_skip_alignment--;
 626                                 }
 627                                 else {
 628                                         if (SLJIT_UNLIKELY(resolve_const_pool_index(compiler, &first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
 629                                                 SLJIT_FREE_EXEC(code);
 630                                                 compiler->error = SLJIT_ERR_ALLOC_FAILED;
 631                                                 return NULL;
 632                                         }
 633                                         buf_ptr++;
 634                                         if (++cpool_current_index >= cpool_size) {
 635                                                 SLJIT_ASSERT(!first_patch);
 636                                                 cpool_size = 0;
 637                                                 if (label && label->size == word_count) {
 638                                                         /* Points after the current instruction. */
 639                                                         label->addr = (sljit_uw)code_ptr;
 640                                                         label->size = code_ptr - code;
 641                                                         label = label->next;
 642                                                 }
 643                                         }
 644                                 }
 645                         }
 646                         else if ((*buf_ptr & 0xff000000) != PUSH_POOL) {
 647 #endif
 648                                 *code_ptr = *buf_ptr++;
 649                                 /* These structures are ordered by their address. */
 650                                 SLJIT_ASSERT(!label || label->size >= word_count);
 651                                 SLJIT_ASSERT(!jump || jump->addr >= word_count);
 652                                 SLJIT_ASSERT(!const_ || const_->addr >= word_count);
 653                                 if (jump && jump->addr == word_count) {
 654 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 655                                         if (detect_jump_type(jump, code_ptr, code))
 656                                                 code_ptr--;
 657                                         jump->addr = (sljit_uw)code_ptr;
 658 #else
 659                                         jump->addr = (sljit_uw)(code_ptr - 2);
 660                                         if (detect_jump_type(jump, code_ptr, code))
 661                                                 code_ptr -= 2;
 662 #endif
 663                                         jump = jump->next;
 664                                 }
 665                                 if (label && label->size == word_count) {
 666                                         /* code_ptr can be affected above. */
 667                                         label->addr = (sljit_uw)(code_ptr + 1);
 668                                         label->size = (code_ptr + 1) - code;
 669                                         label = label->next;
 670                                 }
 671                                 if (const_ && const_->addr == word_count) {
 672 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 673                                         const_->addr = (sljit_uw)code_ptr;
 674 #else
 675                                         const_->addr = (sljit_uw)(code_ptr - 1);
 676 #endif
 677                                         const_ = const_->next;
 678                                 }
 679                                 code_ptr++;
 680 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 681                         }
 682                         else {
 683                                 /* Fortunately, no need to shift. */
 684                                 cpool_size = *buf_ptr++ & ~PUSH_POOL;
 685                                 SLJIT_ASSERT(cpool_size > 0);
 686                                 cpool_start_address = ALIGN_INSTRUCTION(code_ptr + 1);
 687                                 cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, cpool_size);
 688                                 if (cpool_current_index > 0) {
 689                                         /* Unconditional branch. */
 690                                         *code_ptr = B | (((cpool_start_address - code_ptr) + cpool_current_index - 2) & ~PUSH_POOL);
 691                                         code_ptr = cpool_start_address + cpool_current_index;
 692                                 }
 693                                 cpool_skip_alignment = CONST_POOL_ALIGNMENT - 1;
 694                                 cpool_current_index = 0;
 695                                 last_pc_patch = code_ptr;
 696                         }
 697 #endif
 698                 } while (buf_ptr < buf_end);
 699                 buf = buf->next;
 700         } while (buf);
 701
 702         SLJIT_ASSERT(!label);
 703         SLJIT_ASSERT(!jump);
 704         SLJIT_ASSERT(!const_);
 705
 706 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 707         SLJIT_ASSERT(cpool_size == 0);
 708         if (compiler->cpool_fill > 0) {
 709                 cpool_start_address = ALIGN_INSTRUCTION(code_ptr);
 710                 cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, compiler->cpool_fill);
 711                 if (cpool_current_index > 0)
 712                         code_ptr = cpool_start_address + cpool_current_index;
 713
 714                 buf_ptr = compiler->cpool;
 715                 buf_end = buf_ptr + compiler->cpool_fill;
 716                 cpool_current_index = 0;
 717                 while (buf_ptr < buf_end) {
 718                         if (SLJIT_UNLIKELY(resolve_const_pool_index(compiler, &first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
 719                                 SLJIT_FREE_EXEC(code);
 720                                 compiler->error = SLJIT_ERR_ALLOC_FAILED;
 721                                 return NULL;
 722                         }
 723                         buf_ptr++;
 724                         cpool_current_index++;
 725                 }
 726                 SLJIT_ASSERT(!first_patch);
 727         }
 728 #endif
 729
 730         jump = compiler->jumps;
 731         while (jump) {
 732                 buf_ptr = (sljit_uw*)jump->addr;
 733
 734                 if (jump->flags & PATCH_B) {
 735                         if (!(jump->flags & JUMP_ADDR)) {
 736                                 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
 737                                 SLJIT_ASSERT(((sljit_sw)jump->u.label->addr - (sljit_sw)(buf_ptr + 2)) <= 0x01ffffff && ((sljit_sw)jump->u.label->addr - (sljit_sw)(buf_ptr + 2)) >= -0x02000000);
 738                                 *buf_ptr |= (((sljit_sw)jump->u.label->addr - (sljit_sw)(buf_ptr + 2)) >> 2) & 0x00ffffff;
 739                         }
 740                         else {
 741                                 SLJIT_ASSERT(((sljit_sw)jump->u.target - (sljit_sw)(buf_ptr + 2)) <= 0x01ffffff && ((sljit_sw)jump->u.target - (sljit_sw)(buf_ptr + 2)) >= -0x02000000);
 742                                 *buf_ptr |= (((sljit_sw)jump->u.target - (sljit_sw)(buf_ptr + 2)) >> 2) & 0x00ffffff;
 743                         }
 744                 }
 745                 else if (jump->flags & SLJIT_REWRITABLE_JUMP) {
 746 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 747                         jump->addr = (sljit_uw)code_ptr;
 748                         code_ptr[0] = (sljit_uw)buf_ptr;
 749                         code_ptr[1] = *buf_ptr;
 750                         inline_set_jump_addr((sljit_uw)code_ptr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
 751                         code_ptr += 2;
 752 #else
 753                         inline_set_jump_addr((sljit_uw)buf_ptr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
 754 #endif
 755                 }
 756                 else {
 757 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 758                         if (jump->flags & IS_BL)
 759                                 buf_ptr--;
 760                         if (*buf_ptr & (1 << 23))
 761                                 buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
 762                         else
 763                                 buf_ptr += 1;
 764                         *buf_ptr = (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target;
 765 #else
 766                         inline_set_jump_addr((sljit_uw)buf_ptr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
 767 #endif
 768                 }
 769                 jump = jump->next;
 770         }
 771
 772 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
 773         const_ = compiler->consts;
 774         while (const_) {
 775                 buf_ptr = (sljit_uw*)const_->addr;
 776                 const_->addr = (sljit_uw)code_ptr;
 777
 778                 code_ptr[0] = (sljit_uw)buf_ptr;
 779                 code_ptr[1] = *buf_ptr;
 780                 if (*buf_ptr & (1 << 23))
 781                         buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
 782                 else
 783                         buf_ptr += 1;
 784                 /* Set the value again (can be a simple constant). */
 785                 inline_set_const((sljit_uw)code_ptr, *buf_ptr, 0);
 786                 code_ptr += 2;
 787
 788                 const_ = const_->next;
 789         }
 790 #endif
 791
 792         SLJIT_ASSERT(code_ptr - code <= (sljit_si)size);
 793
 794         compiler->error = SLJIT_ERR_COMPILED;
 795         compiler->executable_size = (code_ptr - code) * sizeof(sljit_uw);
 796         SLJIT_CACHE_FLUSH(code, code_ptr);
 797         return code;
 798 }
 799
 800 /* --------------------------------------------------------------------- */
 801 /*  Entry, exit                                                          */
 802 /* --------------------------------------------------------------------- */
 803
 804 /* emit_op inp_flags.
 805    WRITE_BACK must be the first, since it is a flag. */
 806 #define WRITE_BACK      0x01
 807 #define ALLOW_IMM       0x02
 808 #define ALLOW_INV_IMM   0x04
 809 #define ALLOW_ANY_IMM   (ALLOW_IMM | ALLOW_INV_IMM)
 810 #define ARG_TEST        0x08
 811
 812 /* Creates an index in data_transfer_insts array. */
 813 #define WORD_DATA       0x00
 814 #define BYTE_DATA       0x10
 815 #define HALF_DATA       0x20
 816 #define SIGNED_DATA     0x40
 817 #define LOAD_DATA       0x80
 818
 819 /* Condition: AL. */
 820 #define EMIT_DATA_PROCESS_INS(opcode, set_flags, dst, src1, src2) \
 821         (0xe0000000 | ((opcode) << 21) | (set_flags) | RD(dst) | RN(src1) | (src2))
 822
 823 static sljit_si emit_op(struct sljit_compiler *compiler, sljit_si op, sljit_si inp_flags,
 824         sljit_si dst, sljit_sw dstw,
 825         sljit_si src1, sljit_sw src1w,
 826         sljit_si src2, sljit_sw src2w);
 827
 828 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_enter(struct sljit_compiler *compiler,
 829         sljit_si options, sljit_si args, sljit_si scratches, sljit_si saveds,
 830         sljit_si fscratches, sljit_si fsaveds, sljit_si local_size)
 831 {
 832         sljit_si size, i, tmp;
 833         sljit_uw push;
 834
 835         CHECK_ERROR();
 836         CHECK(check_sljit_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size));
 837         set_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size);
 838
 839         /* Push saved registers, temporary registers
 840            stmdb sp!, {..., lr} */
 841         push = PUSH | (1 << 14);
 842
 843         tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
 844         for (i = SLJIT_S0; i >= tmp; i--)
 845                 push |= 1 << reg_map[i];
 846
 847         for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
 848                 push |= 1 << reg_map[i];
 849
 850         FAIL_IF(push_inst(compiler, push));
 851
 852         /* Stack must be aligned to 8 bytes: */
 853         size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
 854         local_size = ((size + local_size + 7) & ~7) - size;
 855         compiler->local_size = local_size;
 856         if (local_size > 0)
 857                 FAIL_IF(emit_op(compiler, SLJIT_SUB, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size));
 858
 859         if (args >= 1)
 860                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, SLJIT_S0, SLJIT_UNUSED, RM(SLJIT_R0))));
 861         if (args >= 2)
 862                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, SLJIT_S1, SLJIT_UNUSED, RM(SLJIT_R1))));
 863         if (args >= 3)
 864                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, SLJIT_S2, SLJIT_UNUSED, RM(SLJIT_R2))));
 865
 866         return SLJIT_SUCCESS;
 867 }
 868
 869 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_set_context(struct sljit_compiler *compiler,
 870         sljit_si options, sljit_si args, sljit_si scratches, sljit_si saveds,
 871         sljit_si fscratches, sljit_si fsaveds, sljit_si local_size)
 872 {
 873         sljit_si size;
 874
 875         CHECK_ERROR();
 876         CHECK(check_sljit_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size));
 877         set_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size);
 878
 879         size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
 880         compiler->local_size = ((size + local_size + 7) & ~7) - size;
 881         return SLJIT_SUCCESS;
 882 }
 883
 884 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_return(struct sljit_compiler *compiler, sljit_si op, sljit_si src, sljit_sw srcw)
 885 {
 886         sljit_si i, tmp;
 887         sljit_uw pop;
 888
 889         CHECK_ERROR();
 890         CHECK(check_sljit_emit_return(compiler, op, src, srcw));
 891
 892         FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
 893
 894         if (compiler->local_size > 0)
 895                 FAIL_IF(emit_op(compiler, SLJIT_ADD, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
 896
 897         /* Push saved registers, temporary registers
 898            ldmia sp!, {..., pc} */
 899         pop = POP | (1 << 15);
 900
 901         tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
 902         for (i = SLJIT_S0; i >= tmp; i--)
 903                 pop |= 1 << reg_map[i];
 904
 905         for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
 906                 pop |= 1 << reg_map[i];
 907
 908         return push_inst(compiler, pop);
 909 }
 910
 911 /* --------------------------------------------------------------------- */
 912 /*  Operators                                                            */
 913 /* --------------------------------------------------------------------- */
 914
 915 /* s/l - store/load (1 bit)
 916    u/s - signed/unsigned (1 bit)
 917    w/b/h/N - word/byte/half/NOT allowed (2 bit)
 918    It contans 16 items, but not all are different. */
 919
 920 static sljit_sw data_transfer_insts[16] = {
 921 /* s u w */ 0xe5000000 /* str */,
 922 /* s u b */ 0xe5400000 /* strb */,
 923 /* s u h */ 0xe10000b0 /* strh */,
 924 /* s u N */ 0x00000000 /* not allowed */,
 925 /* s s w */ 0xe5000000 /* str */,
 926 /* s s b */ 0xe5400000 /* strb */,
 927 /* s s h */ 0xe10000b0 /* strh */,
 928 /* s s N */ 0x00000000 /* not allowed */,
 929
 930 /* l u w */ 0xe5100000 /* ldr */,
 931 /* l u b */ 0xe5500000 /* ldrb */,
 932 /* l u h */ 0xe11000b0 /* ldrh */,
 933 /* l u N */ 0x00000000 /* not allowed */,
 934 /* l s w */ 0xe5100000 /* ldr */,
 935 /* l s b */ 0xe11000d0 /* ldrsb */,
 936 /* l s h */ 0xe11000f0 /* ldrsh */,
 937 /* l s N */ 0x00000000 /* not allowed */,
 938 };
 939
 940 #define EMIT_DATA_TRANSFER(type, add, wb, target, base1, base2) \
 941         (data_transfer_insts[(type) >> 4] | ((add) << 23) | ((wb) << 21) | (reg_map[target] << 12) | (reg_map[base1] << 16) | (base2))
 942 /* Normal ldr/str instruction.
 943    Type2: ldrsb, ldrh, ldrsh */
 944 #define IS_TYPE1_TRANSFER(type) \
 945         (data_transfer_insts[(type) >> 4] & 0x04000000)
 946 #define TYPE2_TRANSFER_IMM(imm) \
 947         (((imm) & 0xf) | (((imm) & 0xf0) << 4) | (1 << 22))
 948
 949 /* flags: */
 950   /* Arguments are swapped. */
 951 #define ARGS_SWAPPED    0x01
 952   /* Inverted immediate. */
 953 #define INV_IMM         0x02
 954   /* Source and destination is register. */
 955 #define REG_DEST        0x04
 956 #define REG_SOURCE      0x08
 957   /* One instruction is enough. */
 958 #define FAST_DEST       0x10
 959   /* Multiple instructions are required. */
 960 #define SLOW_DEST       0x20
 961 /* SET_FLAGS must be (1 << 20) as it is also the value of S bit (can be used for optimization). */
 962 #define SET_FLAGS       (1 << 20)
 963 /* dst: reg
 964    src1: reg
 965    src2: reg or imm (if allowed)
 966    SRC2_IMM must be (1 << 25) as it is also the value of I bit (can be used for optimization). */
 967 #define SRC2_IMM        (1 << 25)
 968
 969 #define EMIT_DATA_PROCESS_INS_AND_RETURN(opcode) \
 970         return push_inst(compiler, EMIT_DATA_PROCESS_INS(opcode, flags & SET_FLAGS, dst, src1, (src2 & SRC2_IMM) ? src2 : RM(src2)))
 971
 972 #define EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(opcode, dst, src1, src2) \
 973         return push_inst(compiler, EMIT_DATA_PROCESS_INS(opcode, flags & SET_FLAGS, dst, src1, src2))
 974
 975 #define EMIT_SHIFT_INS_AND_RETURN(opcode) \
 976         SLJIT_ASSERT(!(flags & INV_IMM) && !(src2 & SRC2_IMM)); \
 977         if (compiler->shift_imm != 0x20) { \
 978                 SLJIT_ASSERT(src1 == TMP_REG1); \
 979                 SLJIT_ASSERT(!(flags & ARGS_SWAPPED)); \
 980                 if (compiler->shift_imm != 0) \
 981                         return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, flags & SET_FLAGS, dst, SLJIT_UNUSED, (compiler->shift_imm << 7) | (opcode << 5) | reg_map[src2])); \
 982                 return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, flags & SET_FLAGS, dst, SLJIT_UNUSED, reg_map[src2])); \
 983         } \
 984         return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, flags & SET_FLAGS, dst, SLJIT_UNUSED, (reg_map[(flags & ARGS_SWAPPED) ? src1 : src2] << 8) | (opcode << 5) | 0x10 | ((flags & ARGS_SWAPPED) ? reg_map[src2] : reg_map[src1])));
 985
 986 static SLJIT_INLINE sljit_si emit_single_op(struct sljit_compiler *compiler, sljit_si op, sljit_si flags,
 987         sljit_si dst, sljit_si src1, sljit_si src2)
 988 {
 989         sljit_sw mul_inst;
 990
 991         switch (GET_OPCODE(op)) {
 992         case SLJIT_MOV:
 993                 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
 994                 if (dst != src2) {
 995                         if (src2 & SRC2_IMM) {
 996                                 if (flags & INV_IMM)
 997                                         EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
 998                                 EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
 999                         }
1000                         EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, reg_map[src2]);
1001                 }
1002                 return SLJIT_SUCCESS;
1003
1004         case SLJIT_MOV_UB:
1005         case SLJIT_MOV_SB:
1006                 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1007                 if ((flags & (REG_DEST | REG_SOURCE)) == (REG_DEST | REG_SOURCE)) {
1008 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1009                         if (op == SLJIT_MOV_UB)
1010                                 return push_inst(compiler, EMIT_DATA_PROCESS_INS(AND_DP, 0, dst, src2, SRC2_IMM | 0xff));
1011                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (24 << 7) | reg_map[src2])));
1012                         return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (24 << 7) | (op == SLJIT_MOV_UB ? 0x20 : 0x40) | reg_map[dst]));
1013 #else
1014                         return push_inst(compiler, (op == SLJIT_MOV_UB ? UXTB : SXTB) | RD(dst) | RM(src2));
1015 #endif
1016                 }
1017                 else if (dst != src2) {
1018                         SLJIT_ASSERT(src2 & SRC2_IMM);
1019                         if (flags & INV_IMM)
1020                                 EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
1021                         EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
1022                 }
1023                 return SLJIT_SUCCESS;
1024
1025         case SLJIT_MOV_UH:
1026         case SLJIT_MOV_SH:
1027                 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1028                 if ((flags & (REG_DEST | REG_SOURCE)) == (REG_DEST | REG_SOURCE)) {
1029 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1030                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (16 << 7) | reg_map[src2])));
1031                         return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, (16 << 7) | (op == SLJIT_MOV_UH ? 0x20 : 0x40) | reg_map[dst]));
1032 #else
1033                         return push_inst(compiler, (op == SLJIT_MOV_UH ? UXTH : SXTH) | RD(dst) | RM(src2));
1034 #endif
1035                 }
1036                 else if (dst != src2) {
1037                         SLJIT_ASSERT(src2 & SRC2_IMM);
1038                         if (flags & INV_IMM)
1039                                 EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
1040                         EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
1041                 }
1042                 return SLJIT_SUCCESS;
1043
1044         case SLJIT_NOT:
1045                 if (src2 & SRC2_IMM) {
1046                         if (flags & INV_IMM)
1047                                 EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MOV_DP, dst, SLJIT_UNUSED, src2);
1048                         EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, src2);
1049                 }
1050                 EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(MVN_DP, dst, SLJIT_UNUSED, RM(src2));
1051
1052         case SLJIT_CLZ:
1053                 SLJIT_ASSERT(!(flags & INV_IMM));
1054                 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1055                 FAIL_IF(push_inst(compiler, CLZ | RD(dst) | RM(src2)));
1056                 if (flags & SET_FLAGS)
1057                         EMIT_FULL_DATA_PROCESS_INS_AND_RETURN(CMP_DP, SLJIT_UNUSED, dst, SRC2_IMM);
1058                 return SLJIT_SUCCESS;
1059
1060         case SLJIT_ADD:
1061                 SLJIT_ASSERT(!(flags & INV_IMM));
1062                 EMIT_DATA_PROCESS_INS_AND_RETURN(ADD_DP);
1063
1064         case SLJIT_ADDC:
1065                 SLJIT_ASSERT(!(flags & INV_IMM));
1066                 EMIT_DATA_PROCESS_INS_AND_RETURN(ADC_DP);
1067
1068         case SLJIT_SUB:
1069                 SLJIT_ASSERT(!(flags & INV_IMM));
1070                 if (!(flags & ARGS_SWAPPED))
1071                         EMIT_DATA_PROCESS_INS_AND_RETURN(SUB_DP);
1072                 EMIT_DATA_PROCESS_INS_AND_RETURN(RSB_DP);
1073
1074         case SLJIT_SUBC:
1075                 SLJIT_ASSERT(!(flags & INV_IMM));
1076                 if (!(flags & ARGS_SWAPPED))
1077                         EMIT_DATA_PROCESS_INS_AND_RETURN(SBC_DP);
1078                 EMIT_DATA_PROCESS_INS_AND_RETURN(RSC_DP);
1079
1080         case SLJIT_MUL:
1081                 SLJIT_ASSERT(!(flags & INV_IMM));
1082                 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1083                 if (SLJIT_UNLIKELY(op & SLJIT_SET_O))
1084                         mul_inst = SMULL | (reg_map[TMP_REG3] << 16) | (reg_map[dst] << 12);
1085                 else
1086                         mul_inst = MUL | (reg_map[dst] << 16);
1087
1088                 if (dst != src2)
1089                         FAIL_IF(push_inst(compiler, mul_inst | (reg_map[src1] << 8) | reg_map[src2]));
1090                 else if (dst != src1)
1091                         FAIL_IF(push_inst(compiler, mul_inst | (reg_map[src2] << 8) | reg_map[src1]));
1092                 else {
1093                         /* Rm and Rd must not be the same register. */
1094                         SLJIT_ASSERT(dst != TMP_REG1);
1095                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG1, SLJIT_UNUSED, reg_map[src2])));
1096                         FAIL_IF(push_inst(compiler, mul_inst | (reg_map[src2] << 8) | reg_map[TMP_REG1]));
1097                 }
1098
1099                 if (!(op & SLJIT_SET_O))
1100                         return SLJIT_SUCCESS;
1101
1102                 /* We need to use TMP_REG3. */
1103                 compiler->cache_arg = 0;
1104                 compiler->cache_argw = 0;
1105                 /* cmp TMP_REG2, dst asr #31. */
1106                 return push_inst(compiler, EMIT_DATA_PROCESS_INS(CMP_DP, SET_FLAGS, SLJIT_UNUSED, TMP_REG3, RM(dst) | 0xfc0));
1107
1108         case SLJIT_AND:
1109                 if (!(flags & INV_IMM))
1110                         EMIT_DATA_PROCESS_INS_AND_RETURN(AND_DP);
1111                 EMIT_DATA_PROCESS_INS_AND_RETURN(BIC_DP);
1112
1113         case SLJIT_OR:
1114                 SLJIT_ASSERT(!(flags & INV_IMM));
1115                 EMIT_DATA_PROCESS_INS_AND_RETURN(ORR_DP);
1116
1117         case SLJIT_XOR:
1118                 SLJIT_ASSERT(!(flags & INV_IMM));
1119                 EMIT_DATA_PROCESS_INS_AND_RETURN(EOR_DP);
1120
1121         case SLJIT_SHL:
1122                 EMIT_SHIFT_INS_AND_RETURN(0);
1123
1124         case SLJIT_LSHR:
1125                 EMIT_SHIFT_INS_AND_RETURN(1);
1126
1127         case SLJIT_ASHR:
1128                 EMIT_SHIFT_INS_AND_RETURN(2);
1129         }
1130         SLJIT_ASSERT_STOP();
1131         return SLJIT_SUCCESS;
1132 }
1133
1134 #undef EMIT_DATA_PROCESS_INS_AND_RETURN
1135 #undef EMIT_FULL_DATA_PROCESS_INS_AND_RETURN
1136 #undef EMIT_SHIFT_INS_AND_RETURN
1137
1138 /* Tests whether the immediate can be stored in the 12 bit imm field.
1139    Returns with 0 if not possible. */
1140 static sljit_uw get_imm(sljit_uw imm)
1141 {
1142         sljit_si rol;
1143
1144         if (imm <= 0xff)
1145                 return SRC2_IMM | imm;
1146
1147         if (!(imm & 0xff000000)) {
1148                 imm <<= 8;
1149                 rol = 8;
1150         }
1151         else {
1152                 imm = (imm << 24) | (imm >> 8);
1153                 rol = 0;
1154         }
1155
1156         if (!(imm & 0xff000000)) {
1157                 imm <<= 8;
1158                 rol += 4;
1159         }
1160
1161         if (!(imm & 0xf0000000)) {
1162                 imm <<= 4;
1163                 rol += 2;
1164         }
1165
1166         if (!(imm & 0xc0000000)) {
1167                 imm <<= 2;
1168                 rol += 1;
1169         }
1170
1171         if (!(imm & 0x00ffffff))
1172                 return SRC2_IMM | (imm >> 24) | (rol << 8);
1173         else
1174                 return 0;
1175 }
1176
1177 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1178 static sljit_si generate_int(struct sljit_compiler *compiler, sljit_si reg, sljit_uw imm, sljit_si positive)
1179 {
1180         sljit_uw mask;
1181         sljit_uw imm1;
1182         sljit_uw imm2;
1183         sljit_si rol;
1184
1185         /* Step1: Search a zero byte (8 continous zero bit). */
1186         mask = 0xff000000;
1187         rol = 8;
1188         while(1) {
1189                 if (!(imm & mask)) {
1190                         /* Rol imm by rol. */
1191                         imm = (imm << rol) | (imm >> (32 - rol));
1192                         /* Calculate arm rol. */
1193                         rol = 4 + (rol >> 1);
1194                         break;
1195                 }
1196                 rol += 2;
1197                 mask >>= 2;
1198                 if (mask & 0x3) {
1199                         /* rol by 8. */
1200                         imm = (imm << 8) | (imm >> 24);
1201                         mask = 0xff00;
1202                         rol = 24;
1203                         while (1) {
1204                                 if (!(imm & mask)) {
1205                                         /* Rol imm by rol. */
1206                                         imm = (imm << rol) | (imm >> (32 - rol));
1207                                         /* Calculate arm rol. */
1208                                         rol = (rol >> 1) - 8;
1209                                         break;
1210                                 }
1211                                 rol += 2;
1212                                 mask >>= 2;
1213                                 if (mask & 0x3)
1214                                         return 0;
1215                         }
1216                         break;
1217                 }
1218         }
1219
1220         /* The low 8 bit must be zero. */
1221         SLJIT_ASSERT(!(imm & 0xff));
1222
1223         if (!(imm & 0xff000000)) {
1224                 imm1 = SRC2_IMM | ((imm >> 16) & 0xff) | (((rol + 4) & 0xf) << 8);
1225                 imm2 = SRC2_IMM | ((imm >> 8) & 0xff) | (((rol + 8) & 0xf) << 8);
1226         }
1227         else if (imm & 0xc0000000) {
1228                 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1229                 imm <<= 8;
1230                 rol += 4;
1231
1232                 if (!(imm & 0xff000000)) {
1233                         imm <<= 8;
1234                         rol += 4;
1235                 }
1236
1237                 if (!(imm & 0xf0000000)) {
1238                         imm <<= 4;
1239                         rol += 2;
1240                 }
1241
1242                 if (!(imm & 0xc0000000)) {
1243                         imm <<= 2;
1244                         rol += 1;
1245                 }
1246
1247                 if (!(imm & 0x00ffffff))
1248                         imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1249                 else
1250                         return 0;
1251         }
1252         else {
1253                 if (!(imm & 0xf0000000)) {
1254                         imm <<= 4;
1255                         rol += 2;
1256                 }
1257
1258                 if (!(imm & 0xc0000000)) {
1259                         imm <<= 2;
1260                         rol += 1;
1261                 }
1262
1263                 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1264                 imm <<= 8;
1265                 rol += 4;
1266
1267                 if (!(imm & 0xf0000000)) {
1268                         imm <<= 4;
1269                         rol += 2;
1270                 }
1271
1272                 if (!(imm & 0xc0000000)) {
1273                         imm <<= 2;
1274                         rol += 1;
1275                 }
1276
1277                 if (!(imm & 0x00ffffff))
1278                         imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1279                 else
1280                         return 0;
1281         }
1282
1283         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(positive ? MOV_DP : MVN_DP, 0, reg, SLJIT_UNUSED, imm1)));
1284         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(positive ? ORR_DP : BIC_DP, 0, reg, reg, imm2)));
1285         return 1;
1286 }
1287 #endif
1288
1289 static sljit_si load_immediate(struct sljit_compiler *compiler, sljit_si reg, sljit_uw imm)
1290 {
1291         sljit_uw tmp;
1292
1293 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1294         if (!(imm & ~0xffff))
1295                 return push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff));
1296 #endif
1297
1298         /* Create imm by 1 inst. */
1299         tmp = get_imm(imm);
1300         if (tmp)
1301                 return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, reg, SLJIT_UNUSED, tmp));
1302
1303         tmp = get_imm(~imm);
1304         if (tmp)
1305                 return push_inst(compiler, EMIT_DATA_PROCESS_INS(MVN_DP, 0, reg, SLJIT_UNUSED, tmp));
1306
1307 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1308         /* Create imm by 2 inst. */
1309         FAIL_IF(generate_int(compiler, reg, imm, 1));
1310         FAIL_IF(generate_int(compiler, reg, ~imm, 0));
1311
1312         /* Load integer. */
1313         return push_inst_with_literal(compiler, EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0, reg, TMP_PC, 0), imm);
1314 #else
1315         return emit_imm(compiler, reg, imm);
1316 #endif
1317 }
1318
1319 /* Helper function. Dst should be reg + value, using at most 1 instruction, flags does not set. */
1320 static sljit_si emit_set_delta(struct sljit_compiler *compiler, sljit_si dst, sljit_si reg, sljit_sw value)
1321 {
1322         if (value >= 0) {
1323                 value = get_imm(value);
1324                 if (value)
1325                         return push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, dst, reg, value));
1326         }
1327         else {
1328                 value = get_imm(-value);
1329                 if (value)
1330                         return push_inst(compiler, EMIT_DATA_PROCESS_INS(SUB_DP, 0, dst, reg, value));
1331         }
1332         return SLJIT_ERR_UNSUPPORTED;
1333 }
1334
1335 /* Can perform an operation using at most 1 instruction. */
1336 static sljit_si getput_arg_fast(struct sljit_compiler *compiler, sljit_si inp_flags, sljit_si reg, sljit_si arg, sljit_sw argw)
1337 {
1338         sljit_uw imm;
1339
1340         if (arg & SLJIT_IMM) {
1341                 imm = get_imm(argw);
1342                 if (imm) {
1343                         if (inp_flags & ARG_TEST)
1344                                 return 1;
1345                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, reg, SLJIT_UNUSED, imm)));
1346                         return -1;
1347                 }
1348                 imm = get_imm(~argw);
1349                 if (imm) {
1350                         if (inp_flags & ARG_TEST)
1351                                 return 1;
1352                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MVN_DP, 0, reg, SLJIT_UNUSED, imm)));
1353                         return -1;
1354                 }
1355                 return 0;
1356         }
1357
1358         SLJIT_ASSERT(arg & SLJIT_MEM);
1359
1360         /* Fast loads/stores. */
1361         if (!(arg & REG_MASK))
1362                 return 0;
1363
1364         if (arg & OFFS_REG_MASK) {
1365                 if ((argw & 0x3) != 0 && !IS_TYPE1_TRANSFER(inp_flags))
1366                         return 0;
1367
1368                 if (inp_flags & ARG_TEST)
1369                         return 1;
1370                 FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & REG_MASK,
1371                         RM(OFFS_REG(arg)) | (IS_TYPE1_TRANSFER(inp_flags) ? SRC2_IMM : 0) | ((argw & 0x3) << 7))));
1372                 return -1;
1373         }
1374
1375         if (IS_TYPE1_TRANSFER(inp_flags)) {
1376                 if (argw >= 0 && argw <= 0xfff) {
1377                         if (inp_flags & ARG_TEST)
1378                                 return 1;
1379                         FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & REG_MASK, argw)));
1380                         return -1;
1381                 }
1382                 if (argw < 0 && argw >= -0xfff) {
1383                         if (inp_flags & ARG_TEST)
1384                                 return 1;
1385                         FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 0, inp_flags & WRITE_BACK, reg, arg & REG_MASK, -argw)));
1386                         return -1;
1387                 }
1388         }
1389         else {
1390                 if (argw >= 0 && argw <= 0xff) {
1391                         if (inp_flags & ARG_TEST)
1392                                 return 1;
1393                         FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & REG_MASK, TYPE2_TRANSFER_IMM(argw))));
1394                         return -1;
1395                 }
1396                 if (argw < 0 && argw >= -0xff) {
1397                         if (inp_flags & ARG_TEST)
1398                                 return 1;
1399                         argw = -argw;
1400                         FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 0, inp_flags & WRITE_BACK, reg, arg & REG_MASK, TYPE2_TRANSFER_IMM(argw))));
1401                         return -1;
1402                 }
1403         }
1404
1405         return 0;
1406 }
1407
1408 /* See getput_arg below.
1409    Note: can_cache is called only for binary operators. Those
1410    operators always uses word arguments without write back. */
1411 static sljit_si can_cache(sljit_si arg, sljit_sw argw, sljit_si next_arg, sljit_sw next_argw)
1412 {
1413         /* Immediate caching is not supported as it would be an operation on constant arguments. */
1414         if (arg & SLJIT_IMM)
1415                 return 0;
1416
1417         /* Always a simple operation. */
1418         if (arg & OFFS_REG_MASK)
1419                 return 0;
1420
1421         if (!(arg & REG_MASK)) {
1422                 /* Immediate access. */
1423                 if ((next_arg & SLJIT_MEM) && ((sljit_uw)argw - (sljit_uw)next_argw <= 0xfff || (sljit_uw)next_argw - (sljit_uw)argw <= 0xfff))
1424                         return 1;
1425                 return 0;
1426         }
1427
1428         if (argw <= 0xfffff && argw >= -0xfffff)
1429                 return 0;
1430
1431         if (argw == next_argw && (next_arg & SLJIT_MEM))
1432                 return 1;
1433
1434         if (arg == next_arg && ((sljit_uw)argw - (sljit_uw)next_argw <= 0xfff || (sljit_uw)next_argw - (sljit_uw)argw <= 0xfff))
1435                 return 1;
1436
1437         return 0;
1438 }
1439
1440 #define GETPUT_ARG_DATA_TRANSFER(add, wb, target, base, imm) \
1441         if (max_delta & 0xf00) \
1442                 FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, add, wb, target, base, imm))); \
1443         else \
1444                 FAIL_IF(push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, add, wb, target, base, TYPE2_TRANSFER_IMM(imm))));
1445
1446 #define TEST_WRITE_BACK() \
1447         if (inp_flags & WRITE_BACK) { \
1448                 tmp_r = arg & REG_MASK; \
1449                 if (reg == tmp_r) { \
1450                         /* This can only happen for stores */ \
1451                         /* since ldr reg, [reg, ...]! has no meaning */ \
1452                         SLJIT_ASSERT(!(inp_flags & LOAD_DATA)); \
1453                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG3, SLJIT_UNUSED, RM(reg)))); \
1454                         reg = TMP_REG3; \
1455                 } \
1456         }
1457
1458 /* Emit the necessary instructions. See can_cache above. */
1459 static sljit_si getput_arg(struct sljit_compiler *compiler, sljit_si inp_flags, sljit_si reg, sljit_si arg, sljit_sw argw, sljit_si next_arg, sljit_sw next_argw)
1460 {
1461         sljit_si tmp_r;
1462         sljit_sw max_delta;
1463         sljit_sw sign;
1464         sljit_uw imm;
1465
1466         if (arg & SLJIT_IMM) {
1467                 SLJIT_ASSERT(inp_flags & LOAD_DATA);
1468                 return load_immediate(compiler, reg, argw);
1469         }
1470
1471         SLJIT_ASSERT(arg & SLJIT_MEM);
1472
1473         tmp_r = (inp_flags & LOAD_DATA) ? reg : TMP_REG3;
1474         max_delta = IS_TYPE1_TRANSFER(inp_flags) ? 0xfff : 0xff;
1475
1476         if ((arg & REG_MASK) == SLJIT_UNUSED) {
1477                 /* Write back is not used. */
1478                 imm = (sljit_uw)(argw - compiler->cache_argw);
1479                 if ((compiler->cache_arg & SLJIT_IMM) && (imm <= (sljit_uw)max_delta || imm >= (sljit_uw)-max_delta)) {
1480                         if (imm <= (sljit_uw)max_delta) {
1481                                 sign = 1;
1482                                 argw = argw - compiler->cache_argw;
1483                         }
1484                         else {
1485                                 sign = 0;
1486                                 argw = compiler->cache_argw - argw;
1487                         }
1488
1489                         GETPUT_ARG_DATA_TRANSFER(sign, 0, reg, TMP_REG3, argw);
1490                         return SLJIT_SUCCESS;
1491                 }
1492
1493                 /* With write back, we can create some sophisticated loads, but
1494                    it is hard to decide whether we should convert downward (0s) or upward (1s). */
1495                 imm = (sljit_uw)(argw - next_argw);
1496                 if ((next_arg & SLJIT_MEM) && (imm <= (sljit_uw)max_delta || imm >= (sljit_uw)-max_delta)) {
1497                         SLJIT_ASSERT(inp_flags & LOAD_DATA);
1498
1499                         compiler->cache_arg = SLJIT_IMM;
1500                         compiler->cache_argw = argw;
1501                         tmp_r = TMP_REG3;
1502                 }
1503
1504                 FAIL_IF(load_immediate(compiler, tmp_r, argw));
1505                 GETPUT_ARG_DATA_TRANSFER(1, 0, reg, tmp_r, 0);
1506                 return SLJIT_SUCCESS;
1507         }
1508
1509         if (arg & OFFS_REG_MASK) {
1510                 SLJIT_ASSERT((argw & 0x3) && !(max_delta & 0xf00));
1511                 if (inp_flags & WRITE_BACK)
1512                         tmp_r = arg & REG_MASK;
1513                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, tmp_r, arg & REG_MASK, RM(OFFS_REG(arg)) | ((argw & 0x3) << 7))));
1514                 return push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, 0, reg, tmp_r, TYPE2_TRANSFER_IMM(0)));
1515         }
1516
1517         imm = (sljit_uw)(argw - compiler->cache_argw);
1518         if (compiler->cache_arg == arg && imm <= (sljit_uw)max_delta) {
1519                 SLJIT_ASSERT(!(inp_flags & WRITE_BACK));
1520                 GETPUT_ARG_DATA_TRANSFER(1, 0, reg, TMP_REG3, imm);
1521                 return SLJIT_SUCCESS;
1522         }
1523         if (compiler->cache_arg == arg && imm >= (sljit_uw)-max_delta) {
1524                 SLJIT_ASSERT(!(inp_flags & WRITE_BACK));
1525                 imm = (sljit_uw)-(sljit_sw)imm;
1526                 GETPUT_ARG_DATA_TRANSFER(0, 0, reg, TMP_REG3, imm);
1527                 return SLJIT_SUCCESS;
1528         }
1529
1530         imm = get_imm(argw & ~max_delta);
1531         if (imm) {
1532                 TEST_WRITE_BACK();
1533                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, tmp_r, arg & REG_MASK, imm)));
1534                 GETPUT_ARG_DATA_TRANSFER(1, inp_flags & WRITE_BACK, reg, tmp_r, argw & max_delta);
1535                 return SLJIT_SUCCESS;
1536         }
1537
1538         imm = get_imm(-argw & ~max_delta);
1539         if (imm) {
1540                 argw = -argw;
1541                 TEST_WRITE_BACK();
1542                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(SUB_DP, 0, tmp_r, arg & REG_MASK, imm)));
1543                 GETPUT_ARG_DATA_TRANSFER(0, inp_flags & WRITE_BACK, reg, tmp_r, argw & max_delta);
1544                 return SLJIT_SUCCESS;
1545         }
1546
1547         if ((compiler->cache_arg & SLJIT_IMM) && compiler->cache_argw == argw) {
1548                 TEST_WRITE_BACK();
1549                 return push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & REG_MASK, RM(TMP_REG3) | (max_delta & 0xf00 ? SRC2_IMM : 0)));
1550         }
1551
1552         if (argw == next_argw && (next_arg & SLJIT_MEM)) {
1553                 SLJIT_ASSERT(inp_flags & LOAD_DATA);
1554                 FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1555
1556                 compiler->cache_arg = SLJIT_IMM;
1557                 compiler->cache_argw = argw;
1558
1559                 TEST_WRITE_BACK();
1560                 return push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & REG_MASK, RM(TMP_REG3) | (max_delta & 0xf00 ? SRC2_IMM : 0)));
1561         }
1562
1563         imm = (sljit_uw)(argw - next_argw);
1564         if (arg == next_arg && !(inp_flags & WRITE_BACK) && (imm <= (sljit_uw)max_delta || imm >= (sljit_uw)-max_delta)) {
1565                 SLJIT_ASSERT(inp_flags & LOAD_DATA);
1566                 FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1567                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG3, TMP_REG3, reg_map[arg & REG_MASK])));
1568
1569                 compiler->cache_arg = arg;
1570                 compiler->cache_argw = argw;
1571
1572                 GETPUT_ARG_DATA_TRANSFER(1, 0, reg, TMP_REG3, 0);
1573                 return SLJIT_SUCCESS;
1574         }
1575
1576         if ((arg & REG_MASK) == tmp_r) {
1577                 compiler->cache_arg = SLJIT_IMM;
1578                 compiler->cache_argw = argw;
1579                 tmp_r = TMP_REG3;
1580         }
1581
1582         FAIL_IF(load_immediate(compiler, tmp_r, argw));
1583         return push_inst(compiler, EMIT_DATA_TRANSFER(inp_flags, 1, inp_flags & WRITE_BACK, reg, arg & REG_MASK, reg_map[tmp_r] | (max_delta & 0xf00 ? SRC2_IMM : 0)));
1584 }
1585
1586 static SLJIT_INLINE sljit_si emit_op_mem(struct sljit_compiler *compiler, sljit_si flags, sljit_si reg, sljit_si arg, sljit_sw argw)
1587 {
1588         if (getput_arg_fast(compiler, flags, reg, arg, argw))
1589                 return compiler->error;
1590         compiler->cache_arg = 0;
1591         compiler->cache_argw = 0;
1592         return getput_arg(compiler, flags, reg, arg, argw, 0, 0);
1593 }
1594
1595 static SLJIT_INLINE sljit_si emit_op_mem2(struct sljit_compiler *compiler, sljit_si flags, sljit_si reg, sljit_si arg1, sljit_sw arg1w, sljit_si arg2, sljit_sw arg2w)
1596 {
1597         if (getput_arg_fast(compiler, flags, reg, arg1, arg1w))
1598                 return compiler->error;
1599         return getput_arg(compiler, flags, reg, arg1, arg1w, arg2, arg2w);
1600 }
1601
1602 static sljit_si emit_op(struct sljit_compiler *compiler, sljit_si op, sljit_si inp_flags,
1603         sljit_si dst, sljit_sw dstw,
1604         sljit_si src1, sljit_sw src1w,
1605         sljit_si src2, sljit_sw src2w)
1606 {
1607         /* arg1 goes to TMP_REG1 or src reg
1608            arg2 goes to TMP_REG2, imm or src reg
1609            TMP_REG3 can be used for caching
1610            result goes to TMP_REG2, so put result can use TMP_REG1 and TMP_REG3. */
1611
1612         /* We prefers register and simple consts. */
1613         sljit_si dst_r;
1614         sljit_si src1_r;
1615         sljit_si src2_r = 0;
1616         sljit_si sugg_src2_r = TMP_REG2;
1617         sljit_si flags = GET_FLAGS(op) ? SET_FLAGS : 0;
1618
1619         compiler->cache_arg = 0;
1620         compiler->cache_argw = 0;
1621
1622         /* Destination check. */
1623         if (SLJIT_UNLIKELY(dst == SLJIT_UNUSED)) {
1624                 if (op >= SLJIT_MOV && op <= SLJIT_MOVU_SI && !(src2 & SLJIT_MEM))
1625                         return SLJIT_SUCCESS;
1626                 dst_r = TMP_REG2;
1627         }
1628         else if (FAST_IS_REG(dst)) {
1629                 dst_r = dst;
1630                 flags |= REG_DEST;
1631                 if (op >= SLJIT_MOV && op <= SLJIT_MOVU_SI)
1632                         sugg_src2_r = dst_r;
1633         }
1634         else {
1635                 SLJIT_ASSERT(dst & SLJIT_MEM);
1636                 if (getput_arg_fast(compiler, inp_flags | ARG_TEST, TMP_REG2, dst, dstw)) {
1637                         flags |= FAST_DEST;
1638                         dst_r = TMP_REG2;
1639                 }
1640                 else {
1641                         flags |= SLOW_DEST;
1642                         dst_r = 0;
1643                 }
1644         }
1645
1646         /* Source 1. */
1647         if (FAST_IS_REG(src1))
1648                 src1_r = src1;
1649         else if (FAST_IS_REG(src2)) {
1650                 flags |= ARGS_SWAPPED;
1651                 src1_r = src2;
1652                 src2 = src1;
1653                 src2w = src1w;
1654         }
1655         else do { /* do { } while(0) is used because of breaks. */
1656                 src1_r = 0;
1657                 if ((inp_flags & ALLOW_ANY_IMM) && (src1 & SLJIT_IMM)) {
1658                         /* The second check will generate a hit. */
1659                         src2_r = get_imm(src1w);
1660                         if (src2_r) {
1661                                 flags |= ARGS_SWAPPED;
1662                                 src1 = src2;
1663                                 src1w = src2w;
1664                                 break;
1665                         }
1666                         if (inp_flags & ALLOW_INV_IMM) {
1667                                 src2_r = get_imm(~src1w);
1668                                 if (src2_r) {
1669                                         flags |= ARGS_SWAPPED | INV_IMM;
1670                                         src1 = src2;
1671                                         src1w = src2w;
1672                                         break;
1673                                 }
1674                         }
1675                         if (GET_OPCODE(op) == SLJIT_ADD) {
1676                                 src2_r = get_imm(-src1w);
1677                                 if (src2_r) {
1678                                         /* Note: ARGS_SWAPPED is intentionally not applied! */
1679                                         src1 = src2;
1680                                         src1w = src2w;
1681                                         op = SLJIT_SUB | GET_ALL_FLAGS(op);
1682                                         break;
1683                                 }
1684                         }
1685                 }
1686
1687                 if (getput_arg_fast(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w)) {
1688                         FAIL_IF(compiler->error);
1689                         src1_r = TMP_REG1;
1690                 }
1691         } while (0);
1692
1693         /* Source 2. */
1694         if (src2_r == 0) {
1695                 if (FAST_IS_REG(src2)) {
1696                         src2_r = src2;
1697                         flags |= REG_SOURCE;
1698                         if (!(flags & REG_DEST) && op >= SLJIT_MOV && op <= SLJIT_MOVU_SI)
1699                                 dst_r = src2_r;
1700                 }
1701                 else do { /* do { } while(0) is used because of breaks. */
1702                         if ((inp_flags & ALLOW_ANY_IMM) && (src2 & SLJIT_IMM)) {
1703                                 src2_r = get_imm(src2w);
1704                                 if (src2_r)
1705                                         break;
1706                                 if (inp_flags & ALLOW_INV_IMM) {
1707                                         src2_r = get_imm(~src2w);
1708                                         if (src2_r) {
1709                                                 flags |= INV_IMM;
1710                                                 break;
1711                                         }
1712                                 }
1713                                 if (GET_OPCODE(op) == SLJIT_ADD) {
1714                                         src2_r = get_imm(-src2w);
1715                                         if (src2_r) {
1716                                                 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1717                                                 flags &= ~ARGS_SWAPPED;
1718                                                 break;
1719                                         }
1720                                 }
1721                                 if (GET_OPCODE(op) == SLJIT_SUB && !(flags & ARGS_SWAPPED)) {
1722                                         src2_r = get_imm(-src2w);
1723                                         if (src2_r) {
1724                                                 op = SLJIT_ADD | GET_ALL_FLAGS(op);
1725                                                 flags &= ~ARGS_SWAPPED;
1726                                                 break;
1727                                         }
1728                                 }
1729                         }
1730
1731                         /* src2_r is 0. */
1732                         if (getput_arg_fast(compiler, inp_flags | LOAD_DATA, sugg_src2_r, src2, src2w)) {
1733                                 FAIL_IF(compiler->error);
1734                                 src2_r = sugg_src2_r;
1735                         }
1736                 } while (0);
1737         }
1738
1739         /* src1_r, src2_r and dst_r can be zero (=unprocessed) or non-zero.
1740            If they are zero, they must not be registers. */
1741         if (src1_r == 0 && src2_r == 0 && dst_r == 0) {
1742                 if (!can_cache(src1, src1w, src2, src2w) && can_cache(src1, src1w, dst, dstw)) {
1743                         SLJIT_ASSERT(!(flags & ARGS_SWAPPED));
1744                         flags |= ARGS_SWAPPED;
1745                         FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src2, src2w, src1, src1w));
1746                         FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG2, src1, src1w, dst, dstw));
1747                 }
1748                 else {
1749                         FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, src2, src2w));
1750                         FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG2, src2, src2w, dst, dstw));
1751                 }
1752                 src1_r = TMP_REG1;
1753                 src2_r = TMP_REG2;
1754         }
1755         else if (src1_r == 0 && src2_r == 0) {
1756                 FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, src2, src2w));
1757                 src1_r = TMP_REG1;
1758         }
1759         else if (src1_r == 0 && dst_r == 0) {
1760                 FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, dst, dstw));
1761                 src1_r = TMP_REG1;
1762         }
1763         else if (src2_r == 0 && dst_r == 0) {
1764                 FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, sugg_src2_r, src2, src2w, dst, dstw));
1765                 src2_r = sugg_src2_r;
1766         }
1767
1768         if (dst_r == 0)
1769                 dst_r = TMP_REG2;
1770
1771         if (src1_r == 0) {
1772                 FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, 0, 0));
1773                 src1_r = TMP_REG1;
1774         }
1775
1776         if (src2_r == 0) {
1777                 FAIL_IF(getput_arg(compiler, inp_flags | LOAD_DATA, sugg_src2_r, src2, src2w, 0, 0));
1778                 src2_r = sugg_src2_r;
1779         }
1780
1781         FAIL_IF(emit_single_op(compiler, op, flags, dst_r, src1_r, src2_r));
1782
1783         if (flags & (FAST_DEST | SLOW_DEST)) {
1784                 if (flags & FAST_DEST)
1785                         FAIL_IF(getput_arg_fast(compiler, inp_flags, dst_r, dst, dstw));
1786                 else
1787                         FAIL_IF(getput_arg(compiler, inp_flags, dst_r, dst, dstw, 0, 0));
1788         }
1789         return SLJIT_SUCCESS;
1790 }
1791
1792 #ifdef __cplusplus
1793 extern "C" {
1794 #endif
1795
1796 #if defined(__GNUC__)
1797 extern unsigned int __aeabi_uidivmod(unsigned int numerator, unsigned int denominator);
1798 extern int __aeabi_idivmod(int numerator, int denominator);
1799 #else
1800 #error "Software divmod functions are needed"
1801 #endif
1802
1803 #ifdef __cplusplus
1804 }
1805 #endif
1806
1807 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op0(struct sljit_compiler *compiler, sljit_si op)
1808 {
1809         CHECK_ERROR();
1810         CHECK(check_sljit_emit_op0(compiler, op));
1811
1812         op = GET_OPCODE(op);
1813         switch (op) {
1814         case SLJIT_BREAKPOINT:
1815                 FAIL_IF(push_inst(compiler, BKPT));
1816                 break;
1817         case SLJIT_NOP:
1818                 FAIL_IF(push_inst(compiler, NOP));
1819                 break;
1820         case SLJIT_LUMUL:
1821         case SLJIT_LSMUL:
1822 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1823                 return push_inst(compiler, (op == SLJIT_LUMUL ? UMULL : SMULL)
1824                         | (reg_map[SLJIT_R1] << 16)
1825                         | (reg_map[SLJIT_R0] << 12)
1826                         | (reg_map[SLJIT_R0] << 8)
1827                         | reg_map[SLJIT_R1]);
1828 #else
1829                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG1, SLJIT_UNUSED, RM(SLJIT_R1))));
1830                 return push_inst(compiler, (op == SLJIT_LUMUL ? UMULL : SMULL)
1831                         | (reg_map[SLJIT_R1] << 16)
1832                         | (reg_map[SLJIT_R0] << 12)
1833                         | (reg_map[SLJIT_R0] << 8)
1834                         | reg_map[TMP_REG1]);
1835 #endif
1836         case SLJIT_UDIVMOD:
1837         case SLJIT_SDIVMOD:
1838         case SLJIT_UDIVI:
1839         case SLJIT_SDIVI:
1840                 SLJIT_COMPILE_ASSERT((SLJIT_UDIVMOD & 0x2) == 0 && SLJIT_UDIVI - 0x2 == SLJIT_UDIVMOD, bad_div_opcode_assignments);
1841                 SLJIT_COMPILE_ASSERT(reg_map[2] == 1 && reg_map[3] == 2, bad_register_mapping);
1842
1843                 if ((op >= SLJIT_UDIVI) && (compiler->scratches >= 3)) {
1844                         FAIL_IF(push_inst(compiler, 0xe52d2008 /* str r2, [sp, #-8]! */));
1845                         FAIL_IF(push_inst(compiler, 0xe58d1004 /* str r1, [sp, #4] */));
1846                 }
1847                 else if ((op >= SLJIT_UDIVI) || (compiler->scratches >= 3))
1848                         FAIL_IF(push_inst(compiler, 0xe52d0008 | (op >= SLJIT_UDIVI ? 0x1000 : 0x2000) /* str r1/r2, [sp, #-8]! */));
1849
1850 #if defined(__GNUC__)
1851                 FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1852                         ((op | 0x2) == SLJIT_UDIVI ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
1853 #else
1854 #error "Software divmod functions are needed"
1855 #endif
1856
1857                 if ((op >= SLJIT_UDIVI) && (compiler->scratches >= 3)) {
1858                         FAIL_IF(push_inst(compiler, 0xe59d1004 /* ldr r1, [sp, #4] */));
1859                         FAIL_IF(push_inst(compiler, 0xe49d2008 /* ldr r2, [sp], #8 */));
1860                 }
1861                 else if ((op >= SLJIT_UDIVI) || (compiler->scratches >= 3))
1862                         return push_inst(compiler, 0xe49d0008 | (op >= SLJIT_UDIVI ? 0x1000 : 0x2000) /* ldr r1/r2, [sp], #8 */);
1863                 return SLJIT_SUCCESS;
1864         }
1865
1866         return SLJIT_SUCCESS;
1867 }
1868
1869 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op1(struct sljit_compiler *compiler, sljit_si op,
1870         sljit_si dst, sljit_sw dstw,
1871         sljit_si src, sljit_sw srcw)
1872 {
1873         CHECK_ERROR();
1874         CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1875         ADJUST_LOCAL_OFFSET(dst, dstw);
1876         ADJUST_LOCAL_OFFSET(src, srcw);
1877
1878         switch (GET_OPCODE(op)) {
1879         case SLJIT_MOV:
1880         case SLJIT_MOV_UI:
1881         case SLJIT_MOV_SI:
1882         case SLJIT_MOV_P:
1883                 return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1884
1885         case SLJIT_MOV_UB:
1886                 return emit_op(compiler, SLJIT_MOV_UB, ALLOW_ANY_IMM | BYTE_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_ub)srcw : srcw);
1887
1888         case SLJIT_MOV_SB:
1889                 return emit_op(compiler, SLJIT_MOV_SB, ALLOW_ANY_IMM | SIGNED_DATA | BYTE_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sb)srcw : srcw);
1890
1891         case SLJIT_MOV_UH:
1892                 return emit_op(compiler, SLJIT_MOV_UH, ALLOW_ANY_IMM | HALF_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_uh)srcw : srcw);
1893
1894         case SLJIT_MOV_SH:
1895                 return emit_op(compiler, SLJIT_MOV_SH, ALLOW_ANY_IMM | SIGNED_DATA | HALF_DATA, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sh)srcw : srcw);
1896
1897         case SLJIT_MOVU:
1898         case SLJIT_MOVU_UI:
1899         case SLJIT_MOVU_SI:
1900         case SLJIT_MOVU_P:
1901                 return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, srcw);
1902
1903         case SLJIT_MOVU_UB:
1904                 return emit_op(compiler, SLJIT_MOV_UB, ALLOW_ANY_IMM | BYTE_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_ub)srcw : srcw);
1905
1906         case SLJIT_MOVU_SB:
1907                 return emit_op(compiler, SLJIT_MOV_SB, ALLOW_ANY_IMM | SIGNED_DATA | BYTE_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sb)srcw : srcw);
1908
1909         case SLJIT_MOVU_UH:
1910                 return emit_op(compiler, SLJIT_MOV_UH, ALLOW_ANY_IMM | HALF_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_uh)srcw : srcw);
1911
1912         case SLJIT_MOVU_SH:
1913                 return emit_op(compiler, SLJIT_MOV_SH, ALLOW_ANY_IMM | SIGNED_DATA | HALF_DATA | WRITE_BACK, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_sh)srcw : srcw);
1914
1915         case SLJIT_NOT:
1916                 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1917
1918         case SLJIT_NEG:
1919 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1920                         || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1921                 compiler->skip_checks = 1;
1922 #endif
1923                 return sljit_emit_op2(compiler, SLJIT_SUB | GET_ALL_FLAGS(op), dst, dstw, SLJIT_IMM, 0, src, srcw);
1924
1925         case SLJIT_CLZ:
1926                 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src, srcw);
1927         }
1928
1929         return SLJIT_SUCCESS;
1930 }
1931
1932 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op2(struct sljit_compiler *compiler, sljit_si op,
1933         sljit_si dst, sljit_sw dstw,
1934         sljit_si src1, sljit_sw src1w,
1935         sljit_si src2, sljit_sw src2w)
1936 {
1937         CHECK_ERROR();
1938         CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1939         ADJUST_LOCAL_OFFSET(dst, dstw);
1940         ADJUST_LOCAL_OFFSET(src1, src1w);
1941         ADJUST_LOCAL_OFFSET(src2, src2w);
1942
1943         switch (GET_OPCODE(op)) {
1944         case SLJIT_ADD:
1945         case SLJIT_ADDC:
1946         case SLJIT_SUB:
1947         case SLJIT_SUBC:
1948         case SLJIT_OR:
1949         case SLJIT_XOR:
1950                 return emit_op(compiler, op, ALLOW_IMM, dst, dstw, src1, src1w, src2, src2w);
1951
1952         case SLJIT_MUL:
1953                 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1954
1955         case SLJIT_AND:
1956                 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, src1, src1w, src2, src2w);
1957
1958         case SLJIT_SHL:
1959         case SLJIT_LSHR:
1960         case SLJIT_ASHR:
1961                 if (src2 & SLJIT_IMM) {
1962                         compiler->shift_imm = src2w & 0x1f;
1963                         return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src1, src1w);
1964                 }
1965                 else {
1966                         compiler->shift_imm = 0x20;
1967                         return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1968                 }
1969         }
1970
1971         return SLJIT_SUCCESS;
1972 }
1973
1974 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_get_register_index(sljit_si reg)
1975 {
1976         CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1977         return reg_map[reg];
1978 }
1979
1980 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_get_float_register_index(sljit_si reg)
1981 {
1982         CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1983         return reg << 1;
1984 }
1985
1986 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op_custom(struct sljit_compiler *compiler,
1987         void *instruction, sljit_si size)
1988 {
1989         CHECK_ERROR();
1990         CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1991
1992         return push_inst(compiler, *(sljit_uw*)instruction);
1993 }
1994
1995 /* --------------------------------------------------------------------- */
1996 /*  Floating point operators                                             */
1997 /* --------------------------------------------------------------------- */
1998
1999 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2000
2001 /* 0 - no fpu
2002    1 - vfp */
2003 static sljit_si arm_fpu_type = -1;
2004
2005 static void init_compiler(void)
2006 {
2007         if (arm_fpu_type != -1)
2008                 return;
2009
2010         /* TODO: Only the OS can help to determine the correct fpu type. */
2011         arm_fpu_type = 1;
2012 }
2013
2014 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_is_fpu_available(void)
2015 {
2016 #ifdef SLJIT_IS_FPU_AVAILABLE
2017         return SLJIT_IS_FPU_AVAILABLE;
2018 #else
2019         if (arm_fpu_type == -1)
2020                 init_compiler();
2021         return arm_fpu_type;
2022 #endif
2023 }
2024
2025 #else
2026
2027 #define arm_fpu_type 1
2028
2029 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_is_fpu_available(void)
2030 {
2031         /* Always available. */
2032         return 1;
2033 }
2034
2035 #endif
2036
2037 #define FPU_LOAD (1 << 20)
2038 #define EMIT_FPU_DATA_TRANSFER(inst, add, base, freg, offs) \
2039         ((inst) | ((add) << 23) | (reg_map[base] << 16) | (freg << 12) | (offs))
2040 #define EMIT_FPU_OPERATION(opcode, mode, dst, src1, src2) \
2041         ((opcode) | (mode) | ((dst) << 12) | (src1) | ((src2) << 16))
2042
2043 static sljit_si emit_fop_mem(struct sljit_compiler *compiler, sljit_si flags, sljit_si reg, sljit_si arg, sljit_sw argw)
2044 {
2045         sljit_sw tmp;
2046         sljit_uw imm;
2047         sljit_sw inst = VSTR_F32 | (flags & (SLJIT_SINGLE_OP | FPU_LOAD));
2048         SLJIT_ASSERT(arg & SLJIT_MEM);
2049
2050         if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
2051                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG1, arg & REG_MASK, RM(OFFS_REG(arg)) | ((argw & 0x3) << 7))));
2052                 arg = SLJIT_MEM | TMP_REG1;
2053                 argw = 0;
2054         }
2055
2056         /* Fast loads and stores. */
2057         if ((arg & REG_MASK)) {
2058                 if (!(argw & ~0x3fc))
2059                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, arg & REG_MASK, reg, argw >> 2));
2060                 if (!(-argw & ~0x3fc))
2061                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, arg & REG_MASK, reg, (-argw) >> 2));
2062         }
2063
2064         if (compiler->cache_arg == arg) {
2065                 tmp = argw - compiler->cache_argw;
2066                 if (!(tmp & ~0x3fc))
2067                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG3, reg, tmp >> 2));
2068                 if (!(-tmp & ~0x3fc))
2069                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG3, reg, -tmp >> 2));
2070                 if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, tmp) != SLJIT_ERR_UNSUPPORTED) {
2071                         FAIL_IF(compiler->error);
2072                         compiler->cache_argw = argw;
2073                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG3, reg, 0));
2074                 }
2075         }
2076
2077         if (arg & REG_MASK) {
2078                 if (emit_set_delta(compiler, TMP_REG1, arg & REG_MASK, argw) != SLJIT_ERR_UNSUPPORTED) {
2079                         FAIL_IF(compiler->error);
2080                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG1, reg, 0));
2081                 }
2082                 imm = get_imm(argw & ~0x3fc);
2083                 if (imm) {
2084                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG1, arg & REG_MASK, imm)));
2085                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG1, reg, (argw & 0x3fc) >> 2));
2086                 }
2087                 imm = get_imm(-argw & ~0x3fc);
2088                 if (imm) {
2089                         argw = -argw;
2090                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(SUB_DP, 0, TMP_REG1, arg & REG_MASK, imm)));
2091                         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG1, reg, (argw & 0x3fc) >> 2));
2092                 }
2093         }
2094
2095         compiler->cache_arg = arg;
2096         compiler->cache_argw = argw;
2097         if (arg & REG_MASK) {
2098                 FAIL_IF(load_immediate(compiler, TMP_REG1, argw));
2099                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(ADD_DP, 0, TMP_REG3, arg & REG_MASK, reg_map[TMP_REG1])));
2100         }
2101         else
2102                 FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
2103
2104         return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG3, reg, 0));
2105 }
2106
2107 static SLJIT_INLINE sljit_si sljit_emit_fop1_convw_fromd(struct sljit_compiler *compiler, sljit_si op,
2108         sljit_si dst, sljit_sw dstw,
2109         sljit_si src, sljit_sw srcw)
2110 {
2111         if (src & SLJIT_MEM) {
2112                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
2113                 src = TMP_FREG1;
2114         }
2115
2116         FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_S32_F32, op & SLJIT_SINGLE_OP, TMP_FREG1, src, 0)));
2117
2118         if (dst == SLJIT_UNUSED)
2119                 return SLJIT_SUCCESS;
2120
2121         if (FAST_IS_REG(dst))
2122                 return push_inst(compiler, VMOV | (1 << 20) | RD(dst) | (TMP_FREG1 << 16));
2123
2124         /* Store the integer value from a VFP register. */
2125         return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
2126 }
2127
2128 static SLJIT_INLINE sljit_si sljit_emit_fop1_convd_fromw(struct sljit_compiler *compiler, sljit_si op,
2129         sljit_si dst, sljit_sw dstw,
2130         sljit_si src, sljit_sw srcw)
2131 {
2132         sljit_si dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
2133
2134         if (FAST_IS_REG(src))
2135                 FAIL_IF(push_inst(compiler, VMOV | RD(src) | (TMP_FREG1 << 16)));
2136         else if (src & SLJIT_MEM) {
2137                 /* Load the integer value into a VFP register. */
2138                 FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
2139         }
2140         else {
2141                 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
2142                 FAIL_IF(push_inst(compiler, VMOV | RD(TMP_REG1) | (TMP_FREG1 << 16)));
2143         }
2144
2145         FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F32_S32, op & SLJIT_SINGLE_OP, dst_r, TMP_FREG1, 0)));
2146
2147         if (dst & SLJIT_MEM)
2148                 return emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP), TMP_FREG1, dst, dstw);
2149         return SLJIT_SUCCESS;
2150 }
2151
2152 static SLJIT_INLINE sljit_si sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_si op,
2153         sljit_si src1, sljit_sw src1w,
2154         sljit_si src2, sljit_sw src2w)
2155 {
2156         if (src1 & SLJIT_MEM) {
2157                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
2158                 src1 = TMP_FREG1;
2159         }
2160
2161         if (src2 & SLJIT_MEM) {
2162                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
2163                 src2 = TMP_FREG2;
2164         }
2165
2166         FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCMP_F32, op & SLJIT_SINGLE_OP, src1, src2, 0)));
2167         return push_inst(compiler, VMRS);
2168 }
2169
2170 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fop1(struct sljit_compiler *compiler, sljit_si op,
2171         sljit_si dst, sljit_sw dstw,
2172         sljit_si src, sljit_sw srcw)
2173 {
2174         sljit_si dst_r;
2175
2176         CHECK_ERROR();
2177         compiler->cache_arg = 0;
2178         compiler->cache_argw = 0;
2179         if (GET_OPCODE(op) != SLJIT_CONVD_FROMS)
2180                 op ^= SLJIT_SINGLE_OP;
2181
2182         SLJIT_COMPILE_ASSERT((SLJIT_SINGLE_OP == 0x100), float_transfer_bit_error);
2183         SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
2184
2185         dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
2186
2187         if (src & SLJIT_MEM) {
2188                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, dst_r, src, srcw));
2189                 src = dst_r;
2190         }
2191
2192         switch (GET_OPCODE(op)) {
2193         case SLJIT_DMOV:
2194                 if (src != dst_r) {
2195                         if (dst_r != TMP_FREG1)
2196                                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, op & SLJIT_SINGLE_OP, dst_r, src, 0)));
2197                         else
2198                                 dst_r = src;
2199                 }
2200                 break;
2201         case SLJIT_DNEG:
2202                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VNEG_F32, op & SLJIT_SINGLE_OP, dst_r, src, 0)));
2203                 break;
2204         case SLJIT_DABS:
2205                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VABS_F32, op & SLJIT_SINGLE_OP, dst_r, src, 0)));
2206                 break;
2207         case SLJIT_CONVD_FROMS:
2208                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F64_F32, op & SLJIT_SINGLE_OP, dst_r, src, 0)));
2209                 op ^= SLJIT_SINGLE_OP;
2210                 break;
2211         }
2212
2213         if (dst & SLJIT_MEM)
2214                 return emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP), dst_r, dst, dstw);
2215         return SLJIT_SUCCESS;
2216 }
2217
2218 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fop2(struct sljit_compiler *compiler, sljit_si op,
2219         sljit_si dst, sljit_sw dstw,
2220         sljit_si src1, sljit_sw src1w,
2221         sljit_si src2, sljit_sw src2w)
2222 {
2223         sljit_si dst_r;
2224
2225         CHECK_ERROR();
2226         CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
2227         ADJUST_LOCAL_OFFSET(dst, dstw);
2228         ADJUST_LOCAL_OFFSET(src1, src1w);
2229         ADJUST_LOCAL_OFFSET(src2, src2w);
2230
2231         compiler->cache_arg = 0;
2232         compiler->cache_argw = 0;
2233         op ^= SLJIT_SINGLE_OP;
2234
2235         dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
2236
2237         if (src2 & SLJIT_MEM) {
2238                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
2239                 src2 = TMP_FREG2;
2240         }
2241
2242         if (src1 & SLJIT_MEM) {
2243                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
2244                 src1 = TMP_FREG1;
2245         }
2246
2247         switch (GET_OPCODE(op)) {
2248         case SLJIT_DADD:
2249                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VADD_F32, op & SLJIT_SINGLE_OP, dst_r, src2, src1)));
2250                 break;
2251
2252         case SLJIT_DSUB:
2253                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VSUB_F32, op & SLJIT_SINGLE_OP, dst_r, src2, src1)));
2254                 break;
2255
2256         case SLJIT_DMUL:
2257                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMUL_F32, op & SLJIT_SINGLE_OP, dst_r, src2, src1)));
2258                 break;
2259
2260         case SLJIT_DDIV:
2261                 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VDIV_F32, op & SLJIT_SINGLE_OP, dst_r, src2, src1)));
2262                 break;
2263         }
2264
2265         if (dst_r == TMP_FREG1)
2266                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_SINGLE_OP), TMP_FREG1, dst, dstw));
2267
2268         return SLJIT_SUCCESS;
2269 }
2270
2271 #undef FPU_LOAD
2272 #undef EMIT_FPU_DATA_TRANSFER
2273 #undef EMIT_FPU_OPERATION
2274
2275 /* --------------------------------------------------------------------- */
2276 /*  Other instructions                                                   */
2277 /* --------------------------------------------------------------------- */
2278
2279 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw)
2280 {
2281         CHECK_ERROR();
2282         CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
2283         ADJUST_LOCAL_OFFSET(dst, dstw);
2284
2285         /* For UNUSED dst. Uncommon, but possible. */
2286         if (dst == SLJIT_UNUSED)
2287                 return SLJIT_SUCCESS;
2288
2289         if (FAST_IS_REG(dst))
2290                 return push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst, SLJIT_UNUSED, RM(TMP_REG3)));
2291
2292         /* Memory. */
2293         if (getput_arg_fast(compiler, WORD_DATA, TMP_REG3, dst, dstw))
2294                 return compiler->error;
2295         /* TMP_REG3 is used for caching. */
2296         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG2, SLJIT_UNUSED, RM(TMP_REG3))));
2297         compiler->cache_arg = 0;
2298         compiler->cache_argw = 0;
2299         return getput_arg(compiler, WORD_DATA, TMP_REG2, dst, dstw, 0, 0);
2300 }
2301
2302 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_si src, sljit_sw srcw)
2303 {
2304         CHECK_ERROR();
2305         CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
2306         ADJUST_LOCAL_OFFSET(src, srcw);
2307
2308         if (FAST_IS_REG(src))
2309                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG3, SLJIT_UNUSED, RM(src))));
2310         else if (src & SLJIT_MEM) {
2311                 if (getput_arg_fast(compiler, WORD_DATA | LOAD_DATA, TMP_REG3, src, srcw))
2312                         FAIL_IF(compiler->error);
2313                 else {
2314                         compiler->cache_arg = 0;
2315                         compiler->cache_argw = 0;
2316                         FAIL_IF(getput_arg(compiler, WORD_DATA | LOAD_DATA, TMP_REG2, src, srcw, 0, 0));
2317                         FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, TMP_REG3, SLJIT_UNUSED, RM(TMP_REG2))));
2318                 }
2319         }
2320         else if (src & SLJIT_IMM)
2321                 FAIL_IF(load_immediate(compiler, TMP_REG3, srcw));
2322         return push_inst(compiler, BLX | RM(TMP_REG3));
2323 }
2324
2325 /* --------------------------------------------------------------------- */
2326 /*  Conditional instructions                                             */
2327 /* --------------------------------------------------------------------- */
2328
2329 static sljit_uw get_cc(sljit_si type)
2330 {
2331         switch (type) {
2332         case SLJIT_EQUAL:
2333         case SLJIT_MUL_NOT_OVERFLOW:
2334         case SLJIT_D_EQUAL:
2335                 return 0x00000000;
2336
2337         case SLJIT_NOT_EQUAL:
2338         case SLJIT_MUL_OVERFLOW:
2339         case SLJIT_D_NOT_EQUAL:
2340                 return 0x10000000;
2341
2342         case SLJIT_LESS:
2343         case SLJIT_D_LESS:
2344                 return 0x30000000;
2345
2346         case SLJIT_GREATER_EQUAL:
2347         case SLJIT_D_GREATER_EQUAL:
2348                 return 0x20000000;
2349
2350         case SLJIT_GREATER:
2351         case SLJIT_D_GREATER:
2352                 return 0x80000000;
2353
2354         case SLJIT_LESS_EQUAL:
2355         case SLJIT_D_LESS_EQUAL:
2356                 return 0x90000000;
2357
2358         case SLJIT_SIG_LESS:
2359                 return 0xb0000000;
2360
2361         case SLJIT_SIG_GREATER_EQUAL:
2362                 return 0xa0000000;
2363
2364         case SLJIT_SIG_GREATER:
2365                 return 0xc0000000;
2366
2367         case SLJIT_SIG_LESS_EQUAL:
2368                 return 0xd0000000;
2369
2370         case SLJIT_OVERFLOW:
2371         case SLJIT_D_UNORDERED:
2372                 return 0x60000000;
2373
2374         case SLJIT_NOT_OVERFLOW:
2375         case SLJIT_D_ORDERED:
2376                 return 0x70000000;
2377
2378         default:
2379                 SLJIT_ASSERT(type >= SLJIT_JUMP && type <= SLJIT_CALL3);
2380                 return 0xe0000000;
2381         }
2382 }
2383
2384 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
2385 {
2386         struct sljit_label *label;
2387
2388         CHECK_ERROR_PTR();
2389         CHECK_PTR(check_sljit_emit_label(compiler));
2390
2391         if (compiler->last_label && compiler->last_label->size == compiler->size)
2392                 return compiler->last_label;
2393
2394         label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
2395         PTR_FAIL_IF(!label);
2396         set_label(label, compiler);
2397         return label;
2398 }
2399
2400 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_si type)
2401 {
2402         struct sljit_jump *jump;
2403
2404         CHECK_ERROR_PTR();
2405         CHECK_PTR(check_sljit_emit_jump(compiler, type));
2406
2407         jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2408         PTR_FAIL_IF(!jump);
2409         set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
2410         type &= 0xff;
2411
2412         /* In ARM, we don't need to touch the arguments. */
2413 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2414         if (type >= SLJIT_FAST_CALL)
2415                 PTR_FAIL_IF(prepare_blx(compiler));
2416         PTR_FAIL_IF(push_inst_with_unique_literal(compiler, ((EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0,
2417                 type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0)) & ~COND_MASK) | get_cc(type), 0));
2418
2419         if (jump->flags & SLJIT_REWRITABLE_JUMP) {
2420                 jump->addr = compiler->size;
2421                 compiler->patches++;
2422         }
2423
2424         if (type >= SLJIT_FAST_CALL) {
2425                 jump->flags |= IS_BL;
2426                 PTR_FAIL_IF(emit_blx(compiler));
2427         }
2428
2429         if (!(jump->flags & SLJIT_REWRITABLE_JUMP))
2430                 jump->addr = compiler->size;
2431 #else
2432         if (type >= SLJIT_FAST_CALL)
2433                 jump->flags |= IS_BL;
2434         PTR_FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2435         PTR_FAIL_IF(push_inst(compiler, (((type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)) & ~COND_MASK) | get_cc(type)));
2436         jump->addr = compiler->size;
2437 #endif
2438         return jump;
2439 }
2440
2441 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_ijump(struct sljit_compiler *compiler, sljit_si type, sljit_si src, sljit_sw srcw)
2442 {
2443         struct sljit_jump *jump;
2444
2445         CHECK_ERROR();
2446         CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
2447         ADJUST_LOCAL_OFFSET(src, srcw);
2448
2449         /* In ARM, we don't need to touch the arguments. */
2450         if (!(src & SLJIT_IMM)) {
2451                 if (FAST_IS_REG(src))
2452                         return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(src));
2453
2454                 SLJIT_ASSERT(src & SLJIT_MEM);
2455                 FAIL_IF(emit_op_mem(compiler, WORD_DATA | LOAD_DATA, TMP_REG2, src, srcw));
2456                 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG2));
2457         }
2458
2459         jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2460         FAIL_IF(!jump);
2461         set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
2462         jump->u.target = srcw;
2463
2464 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2465         if (type >= SLJIT_FAST_CALL)
2466                 FAIL_IF(prepare_blx(compiler));
2467         FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0), 0));
2468         if (type >= SLJIT_FAST_CALL)
2469                 FAIL_IF(emit_blx(compiler));
2470 #else
2471         FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2472         FAIL_IF(push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)));
2473 #endif
2474         jump->addr = compiler->size;
2475         return SLJIT_SUCCESS;
2476 }
2477
2478 SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_si op,
2479         sljit_si dst, sljit_sw dstw,
2480         sljit_si src, sljit_sw srcw,
2481         sljit_si type)
2482 {
2483         sljit_si dst_r, flags = GET_ALL_FLAGS(op);
2484         sljit_uw cc, ins;
2485
2486         CHECK_ERROR();
2487         CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, src, srcw, type));
2488         ADJUST_LOCAL_OFFSET(dst, dstw);
2489         ADJUST_LOCAL_OFFSET(src, srcw);
2490
2491         if (dst == SLJIT_UNUSED)
2492                 return SLJIT_SUCCESS;
2493
2494         op = GET_OPCODE(op);
2495         cc = get_cc(type & 0xff);
2496         dst_r = FAST_IS_REG(dst) ? dst : TMP_REG2;
2497
2498         if (op < SLJIT_ADD) {
2499                 FAIL_IF(push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst_r, SLJIT_UNUSED, SRC2_IMM | 0)));
2500                 FAIL_IF(push_inst(compiler, (EMIT_DATA_PROCESS_INS(MOV_DP, 0, dst_r, SLJIT_UNUSED, SRC2_IMM | 1) & ~COND_MASK) | cc));
2501                 return (dst_r == TMP_REG2) ? emit_op_mem(compiler, WORD_DATA, TMP_REG2, dst, dstw) : SLJIT_SUCCESS;
2502         }
2503
2504         ins = (op == SLJIT_AND ? AND_DP : (op == SLJIT_OR ? ORR_DP : EOR_DP));
2505         if ((op == SLJIT_OR || op == SLJIT_XOR) && FAST_IS_REG(dst) && dst == src) {
2506                 FAIL_IF(push_inst(compiler, (EMIT_DATA_PROCESS_INS(ins, 0, dst, dst, SRC2_IMM | 1) & ~COND_MASK) | cc));
2507                 /* The condition must always be set, even if the ORR/EOR is not executed above. */
2508                 return (flags & SLJIT_SET_E) ? push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, SET_FLAGS, TMP_REG1, SLJIT_UNUSED, RM(dst))) : SLJIT_SUCCESS;
2509         }
2510
2511         compiler->cache_arg = 0;
2512         compiler->cache_argw = 0;
2513         if (src & SLJIT_MEM) {
2514                 FAIL_IF(emit_op_mem2(compiler, WORD_DATA | LOAD_DATA, TMP_REG1, src, srcw, dst, dstw));
2515                 src = TMP_REG1;
2516                 srcw = 0;
2517         } else if (src & SLJIT_IMM) {
2518                 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
2519                 src = TMP_REG1;
2520                 srcw = 0;
2521         }
2522
2523         FAIL_IF(push_inst(compiler, (EMIT_DATA_PROCESS_INS(ins, 0, dst_r, src, SRC2_IMM | 1) & ~COND_MASK) | cc));
2524         FAIL_IF(push_inst(compiler, (EMIT_DATA_PROCESS_INS(ins, 0, dst_r, src, SRC2_IMM | 0) & ~COND_MASK) | (cc ^ 0x10000000)));
2525         if (dst_r == TMP_REG2)
2526                 FAIL_IF(emit_op_mem2(compiler, WORD_DATA, TMP_REG2, dst, dstw, 0, 0));
2527
2528         return (flags & SLJIT_SET_E) ? push_inst(compiler, EMIT_DATA_PROCESS_INS(MOV_DP, SET_FLAGS, TMP_REG1, SLJIT_UNUSED, RM(dst_r))) : SLJIT_SUCCESS;
2529 }
2530
2531 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw, sljit_sw init_value)
2532 {
2533         struct sljit_const *const_;
2534         sljit_si reg;
2535
2536         CHECK_ERROR_PTR();
2537         CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2538         ADJUST_LOCAL_OFFSET(dst, dstw);
2539
2540         const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2541         PTR_FAIL_IF(!const_);
2542
2543         reg = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2544
2545 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2546         PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_DATA | LOAD_DATA, 1, 0, reg, TMP_PC, 0), init_value));
2547         compiler->patches++;
2548 #else
2549         PTR_FAIL_IF(emit_imm(compiler, reg, init_value));
2550 #endif
2551         set_const(const_, compiler);
2552
2553         if (dst & SLJIT_MEM)
2554                 PTR_FAIL_IF(emit_op_mem(compiler, WORD_DATA, TMP_REG2, dst, dstw));
2555         return const_;
2556 }
2557
2558 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
2559 {
2560         inline_set_jump_addr(addr, new_addr, 1);
2561 }
2562
2563 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
2564 {
2565         inline_set_const(addr, new_constant, 1);
2566 }