sljit_src/sljitNativeX86_64.c

   1 /*
   2  *    Stack-less Just-In-Time compiler
   3  *
   4  *    Copyright 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 /* x86 64-bit arch dependent functions. */
  28
  29 /* --------------------------------------------------------------------- */
  30 /*  Operators                                                            */
  31 /* --------------------------------------------------------------------- */
  32
  33 static sljit_s32 emit_load_imm64(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm)
  34 {
  35         sljit_u8 *inst;
  36
  37         inst = (sljit_u8*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_sw));
  38         FAIL_IF(!inst);
  39         INC_SIZE(2 + sizeof(sljit_sw));
  40         *inst++ = REX_W | ((reg_map[reg] <= 7) ? 0 : REX_B);
  41         *inst++ = U8(MOV_r_i32 | (reg_map[reg] & 0x7));
  42         sljit_unaligned_store_sw(inst, imm);
  43         return SLJIT_SUCCESS;
  44 }
  45
  46 static sljit_s32 emit_do_imm32(struct sljit_compiler *compiler, sljit_u8 rex, sljit_u8 opcode, sljit_sw imm)
  47 {
  48         sljit_u8 *inst;
  49         sljit_uw length = (rex ? 2 : 1) + sizeof(sljit_s32);
  50
  51         inst = (sljit_u8*)ensure_buf(compiler, 1 + length);
  52         FAIL_IF(!inst);
  53         INC_SIZE(length);
  54         if (rex)
  55                 *inst++ = rex;
  56         *inst++ = opcode;
  57         sljit_unaligned_store_s32(inst, (sljit_s32)imm);
  58         return SLJIT_SUCCESS;
  59 }
  60
  61 static sljit_u8* emit_x86_instruction(struct sljit_compiler *compiler, sljit_uw size,
  62         /* The register or immediate operand. */
  63         sljit_s32 a, sljit_sw imma,
  64         /* The general operand (not immediate). */
  65         sljit_s32 b, sljit_sw immb)
  66 {
  67         sljit_u8 *inst;
  68         sljit_u8 *buf_ptr;
  69         sljit_u8 rex = 0;
  70         sljit_u8 reg_lmap_b;
  71         sljit_uw flags = size;
  72         sljit_uw inst_size;
  73
  74         /* The immediate operand must be 32 bit. */
  75         SLJIT_ASSERT(!(a & SLJIT_IMM) || compiler->mode32 || IS_HALFWORD(imma));
  76         /* Both cannot be switched on. */
  77         SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS));
  78         /* Size flags not allowed for typed instructions. */
  79         SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0);
  80         /* Both size flags cannot be switched on. */
  81         SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG));
  82         /* SSE2 and immediate is not possible. */
  83         SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2));
  84         SLJIT_ASSERT((flags & (EX86_PREF_F2 | EX86_PREF_F3)) != (EX86_PREF_F2 | EX86_PREF_F3)
  85                 && (flags & (EX86_PREF_F2 | EX86_PREF_66)) != (EX86_PREF_F2 | EX86_PREF_66)
  86                 && (flags & (EX86_PREF_F3 | EX86_PREF_66)) != (EX86_PREF_F3 | EX86_PREF_66));
  87
  88         size &= 0xf;
  89         inst_size = size;
  90
  91         if (!compiler->mode32 && !(flags & EX86_NO_REXW))
  92                 rex |= REX_W;
  93         else if (flags & EX86_REX)
  94                 rex |= REX;
  95
  96         if (flags & (EX86_PREF_F2 | EX86_PREF_F3))
  97                 inst_size++;
  98         if (flags & EX86_PREF_66)
  99                 inst_size++;
 100
 101         /* Calculate size of b. */
 102         inst_size += 1; /* mod r/m byte. */
 103         if (b & SLJIT_MEM) {
 104                 if (!(b & OFFS_REG_MASK)) {
 105                         if (NOT_HALFWORD(immb)) {
 106                                 PTR_FAIL_IF(emit_load_imm64(compiler, TMP_REG2, immb));
 107                                 immb = 0;
 108                                 if (b & REG_MASK)
 109                                         b |= TO_OFFS_REG(TMP_REG2);
 110                                 else
 111                                         b |= TMP_REG2;
 112                         }
 113                         else if (reg_lmap[b & REG_MASK] == 4)
 114                                 b |= TO_OFFS_REG(SLJIT_SP);
 115                 }
 116
 117                 if (!(b & REG_MASK))
 118                         inst_size += 1 + sizeof(sljit_s32); /* SIB byte required to avoid RIP based addressing. */
 119                 else {
 120                         if (reg_map[b & REG_MASK] >= 8)
 121                                 rex |= REX_B;
 122
 123                         if (immb != 0 && (!(b & OFFS_REG_MASK) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP))) {
 124                                 /* Immediate operand. */
 125                                 if (immb <= 127 && immb >= -128)
 126                                         inst_size += sizeof(sljit_s8);
 127                                 else
 128                                         inst_size += sizeof(sljit_s32);
 129                         }
 130                         else if (reg_lmap[b & REG_MASK] == 5)
 131                                 inst_size += sizeof(sljit_s8);
 132
 133                         if (b & OFFS_REG_MASK) {
 134                                 inst_size += 1; /* SIB byte. */
 135                                 if (reg_map[OFFS_REG(b)] >= 8)
 136                                         rex |= REX_X;
 137                         }
 138                 }
 139         }
 140         else if (!(flags & EX86_SSE2_OP2)) {
 141                 if (reg_map[b] >= 8)
 142                         rex |= REX_B;
 143         }
 144         else if (freg_map[b] >= 8)
 145                 rex |= REX_B;
 146
 147         if (a & SLJIT_IMM) {
 148                 if (flags & EX86_BIN_INS) {
 149                         if (imma <= 127 && imma >= -128) {
 150                                 inst_size += 1;
 151                                 flags |= EX86_BYTE_ARG;
 152                         } else
 153                                 inst_size += 4;
 154                 }
 155                 else if (flags & EX86_SHIFT_INS) {
 156                         imma &= compiler->mode32 ? 0x1f : 0x3f;
 157                         if (imma != 1) {
 158                                 inst_size ++;
 159                                 flags |= EX86_BYTE_ARG;
 160                         }
 161                 } else if (flags & EX86_BYTE_ARG)
 162                         inst_size++;
 163                 else if (flags & EX86_HALF_ARG)
 164                         inst_size += sizeof(short);
 165                 else
 166                         inst_size += sizeof(sljit_s32);
 167         }
 168         else {
 169                 SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG);
 170                 /* reg_map[SLJIT_PREF_SHIFT_REG] is less than 8. */
 171                 if (!(flags & EX86_SSE2_OP1)) {
 172                         if (reg_map[a] >= 8)
 173                                 rex |= REX_R;
 174                 }
 175                 else if (freg_map[a] >= 8)
 176                         rex |= REX_R;
 177         }
 178
 179         if (rex)
 180                 inst_size++;
 181
 182         inst = (sljit_u8*)ensure_buf(compiler, 1 + inst_size);
 183         PTR_FAIL_IF(!inst);
 184
 185         /* Encoding the byte. */
 186         INC_SIZE(inst_size);
 187         if (flags & EX86_PREF_F2)
 188                 *inst++ = 0xf2;
 189         if (flags & EX86_PREF_F3)
 190                 *inst++ = 0xf3;
 191         if (flags & EX86_PREF_66)
 192                 *inst++ = 0x66;
 193         if (rex)
 194                 *inst++ = rex;
 195         buf_ptr = inst + size;
 196
 197         /* Encode mod/rm byte. */
 198         if (!(flags & EX86_SHIFT_INS)) {
 199                 if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
 200                         *inst = (flags & EX86_BYTE_ARG) ? GROUP_BINARY_83 : GROUP_BINARY_81;
 201
 202                 if (a & SLJIT_IMM)
 203                         *buf_ptr = 0;
 204                 else if (!(flags & EX86_SSE2_OP1))
 205                         *buf_ptr = U8(reg_lmap[a] << 3);
 206                 else
 207                         *buf_ptr = U8(freg_lmap[a] << 3);
 208         }
 209         else {
 210                 if (a & SLJIT_IMM) {
 211                         if (imma == 1)
 212                                 *inst = GROUP_SHIFT_1;
 213                         else
 214                                 *inst = GROUP_SHIFT_N;
 215                 } else
 216                         *inst = GROUP_SHIFT_CL;
 217                 *buf_ptr = 0;
 218         }
 219
 220         if (!(b & SLJIT_MEM)) {
 221                 *buf_ptr = U8(*buf_ptr | MOD_REG | (!(flags & EX86_SSE2_OP2) ? reg_lmap[b] : freg_lmap[b]));
 222                 buf_ptr++;
 223         } else if (b & REG_MASK) {
 224                 reg_lmap_b = reg_lmap[b & REG_MASK];
 225
 226                 if (!(b & OFFS_REG_MASK) || (b & OFFS_REG_MASK) == TO_OFFS_REG(SLJIT_SP) || reg_lmap_b == 5) {
 227                         if (immb != 0 || reg_lmap_b == 5) {
 228                                 if (immb <= 127 && immb >= -128)
 229                                         *buf_ptr |= 0x40;
 230                                 else
 231                                         *buf_ptr |= 0x80;
 232                         }
 233
 234                         if (!(b & OFFS_REG_MASK))
 235                                 *buf_ptr++ |= reg_lmap_b;
 236                         else {
 237                                 *buf_ptr++ |= 0x04;
 238                                 *buf_ptr++ = U8(reg_lmap_b | (reg_lmap[OFFS_REG(b)] << 3));
 239                         }
 240
 241                         if (immb != 0 || reg_lmap_b == 5) {
 242                                 if (immb <= 127 && immb >= -128)
 243                                         *buf_ptr++ = U8(immb); /* 8 bit displacement. */
 244                                 else {
 245                                         sljit_unaligned_store_s32(buf_ptr, (sljit_s32)immb); /* 32 bit displacement. */
 246                                         buf_ptr += sizeof(sljit_s32);
 247                                 }
 248                         }
 249                 }
 250                 else {
 251                         *buf_ptr++ |= 0x04;
 252                         *buf_ptr++ = U8(reg_lmap_b | (reg_lmap[OFFS_REG(b)] << 3) | (immb << 6));
 253                 }
 254         }
 255         else {
 256                 *buf_ptr++ |= 0x04;
 257                 *buf_ptr++ = 0x25;
 258                 sljit_unaligned_store_s32(buf_ptr, (sljit_s32)immb); /* 32 bit displacement. */
 259                 buf_ptr += sizeof(sljit_s32);
 260         }
 261
 262         if (a & SLJIT_IMM) {
 263                 if (flags & EX86_BYTE_ARG)
 264                         *buf_ptr = U8(imma);
 265                 else if (flags & EX86_HALF_ARG)
 266                         sljit_unaligned_store_s16(buf_ptr, (sljit_s16)imma);
 267                 else if (!(flags & EX86_SHIFT_INS))
 268                         sljit_unaligned_store_s32(buf_ptr, (sljit_s32)imma);
 269         }
 270
 271         return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1);
 272 }
 273
 274 /* --------------------------------------------------------------------- */
 275 /*  Enter / return                                                       */
 276 /* --------------------------------------------------------------------- */
 277
 278 static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr)
 279 {
 280         sljit_uw type = jump->flags >> TYPE_SHIFT;
 281
 282         int short_addr = !(jump->flags & SLJIT_REWRITABLE_JUMP) && !(jump->flags & JUMP_LABEL) && (jump->u.target <= 0xffffffff);
 283
 284         /* The relative jump below specialized for this case. */
 285         SLJIT_ASSERT(reg_map[TMP_REG2] >= 8);
 286
 287         if (type < SLJIT_JUMP) {
 288                 /* Invert type. */
 289                 *code_ptr++ = U8(get_jump_code(type ^ 0x1) - 0x10);
 290                 *code_ptr++ = short_addr ? (6 + 3) : (10 + 3);
 291         }
 292
 293         *code_ptr++ = short_addr ? REX_B : (REX_W | REX_B);
 294         *code_ptr++ = MOV_r_i32 | reg_lmap[TMP_REG2];
 295         jump->addr = (sljit_uw)code_ptr;
 296
 297         if (jump->flags & JUMP_LABEL)
 298                 jump->flags |= PATCH_MD;
 299         else if (short_addr)
 300                 sljit_unaligned_store_s32(code_ptr, (sljit_s32)jump->u.target);
 301         else
 302                 sljit_unaligned_store_sw(code_ptr, (sljit_sw)jump->u.target);
 303
 304         code_ptr += short_addr ? sizeof(sljit_s32) : sizeof(sljit_sw);
 305
 306         *code_ptr++ = REX_B;
 307         *code_ptr++ = GROUP_FF;
 308         *code_ptr++ = U8(MOD_REG | (type >= SLJIT_FAST_CALL ? CALL_rm : JMP_rm) | reg_lmap[TMP_REG2]);
 309
 310         return code_ptr;
 311 }
 312
 313 static sljit_u8* generate_put_label_code(struct sljit_put_label *put_label, sljit_u8 *code_ptr, sljit_uw max_label)
 314 {
 315         if (max_label > HALFWORD_MAX) {
 316                 put_label->addr -= put_label->flags;
 317                 put_label->flags = PATCH_MD;
 318                 return code_ptr;
 319         }
 320
 321         if (put_label->flags == 0) {
 322                 /* Destination is register. */
 323                 code_ptr = (sljit_u8*)put_label->addr - 2 - sizeof(sljit_uw);
 324
 325                 SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W);
 326                 SLJIT_ASSERT((code_ptr[1] & 0xf8) == MOV_r_i32);
 327
 328                 if ((code_ptr[0] & 0x07) != 0) {
 329                         code_ptr[0] = U8(code_ptr[0] & ~0x08);
 330                         code_ptr += 2 + sizeof(sljit_s32);
 331                 }
 332                 else {
 333                         code_ptr[0] = code_ptr[1];
 334                         code_ptr += 1 + sizeof(sljit_s32);
 335                 }
 336
 337                 put_label->addr = (sljit_uw)code_ptr;
 338                 return code_ptr;
 339         }
 340
 341         code_ptr -= put_label->flags + (2 + sizeof(sljit_uw));
 342         SLJIT_MEMMOVE(code_ptr, code_ptr + (2 + sizeof(sljit_uw)), put_label->flags);
 343
 344         SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W);
 345
 346         if ((code_ptr[1] & 0xf8) == MOV_r_i32) {
 347                 code_ptr += 2 + sizeof(sljit_uw);
 348                 SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W);
 349         }
 350
 351         SLJIT_ASSERT(code_ptr[1] == MOV_rm_r);
 352
 353         code_ptr[0] = U8(code_ptr[0] & ~0x4);
 354         code_ptr[1] = MOV_rm_i32;
 355         code_ptr[2] = U8(code_ptr[2] & ~(0x7 << 3));
 356
 357         code_ptr = (sljit_u8*)(put_label->addr - (2 + sizeof(sljit_uw)) + sizeof(sljit_s32));
 358         put_label->addr = (sljit_uw)code_ptr;
 359         put_label->flags = 0;
 360         return code_ptr;
 361 }
 362
 363 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
 364         sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
 365         sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
 366 {
 367         sljit_uw size;
 368         sljit_s32 word_arg_count = 0;
 369         sljit_s32 saved_arg_count = 0;
 370         sljit_s32 saved_regs_size, tmp, i;
 371 #ifdef _WIN64
 372         sljit_s32 saved_float_regs_size;
 373         sljit_s32 saved_float_regs_offset = 0;
 374         sljit_s32 float_arg_count = 0;
 375 #endif /* _WIN64 */
 376         sljit_u8 *inst;
 377
 378         CHECK_ERROR();
 379         CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
 380         set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
 381
 382         /* Emit ENDBR64 at function entry if needed.  */
 383         FAIL_IF(emit_endbranch(compiler));
 384
 385         compiler->mode32 = 0;
 386
 387         /* Including the return address saved by the call instruction. */
 388         saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
 389
 390         tmp = SLJIT_S0 - saveds;
 391         for (i = SLJIT_S0; i > tmp; i--) {
 392                 size = reg_map[i] >= 8 ? 2 : 1;
 393                 inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
 394                 FAIL_IF(!inst);
 395                 INC_SIZE(size);
 396                 if (reg_map[i] >= 8)
 397                         *inst++ = REX_B;
 398                 PUSH_REG(reg_lmap[i]);
 399         }
 400
 401         for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--) {
 402                 size = reg_map[i] >= 8 ? 2 : 1;
 403                 inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
 404                 FAIL_IF(!inst);
 405                 INC_SIZE(size);
 406                 if (reg_map[i] >= 8)
 407                         *inst++ = REX_B;
 408                 PUSH_REG(reg_lmap[i]);
 409         }
 410
 411 #ifdef _WIN64
 412         local_size += SLJIT_LOCALS_OFFSET;
 413         saved_float_regs_size = GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, 16);
 414
 415         if (saved_float_regs_size > 0) {
 416                 saved_float_regs_offset = ((local_size + 0xf) & ~0xf);
 417                 local_size = saved_float_regs_offset + saved_float_regs_size;
 418         }
 419 #else /* !_WIN64 */
 420         SLJIT_ASSERT(SLJIT_LOCALS_OFFSET == 0);
 421 #endif /* _WIN64 */
 422
 423         arg_types >>= SLJIT_ARG_SHIFT;
 424
 425         while (arg_types > 0) {
 426                 if ((arg_types & SLJIT_ARG_MASK) < SLJIT_ARG_TYPE_F64) {
 427                         tmp = 0;
 428 #ifndef _WIN64
 429                         switch (word_arg_count) {
 430                         case 0:
 431                                 tmp = SLJIT_R2;
 432                                 break;
 433                         case 1:
 434                                 tmp = SLJIT_R1;
 435                                 break;
 436                         case 2:
 437                                 tmp = TMP_REG1;
 438                                 break;
 439                         default:
 440                                 tmp = SLJIT_R3;
 441                                 break;
 442                         }
 443 #else /* !_WIN64 */
 444                         switch (word_arg_count + float_arg_count) {
 445                         case 0:
 446                                 tmp = SLJIT_R3;
 447                                 break;
 448                         case 1:
 449                                 tmp = SLJIT_R1;
 450                                 break;
 451                         case 2:
 452                                 tmp = SLJIT_R2;
 453                                 break;
 454                         default:
 455                                 tmp = TMP_REG1;
 456                                 break;
 457                         }
 458 #endif /* _WIN64 */
 459                         if (arg_types & SLJIT_ARG_TYPE_SCRATCH_REG) {
 460                                 if (tmp != SLJIT_R0 + word_arg_count)
 461                                         EMIT_MOV(compiler, SLJIT_R0 + word_arg_count, 0, tmp, 0);
 462                         } else {
 463                                 EMIT_MOV(compiler, SLJIT_S0 - saved_arg_count, 0, tmp, 0);
 464                                 saved_arg_count++;
 465                         }
 466                         word_arg_count++;
 467                 } else {
 468 #ifdef _WIN64
 469                         SLJIT_COMPILE_ASSERT(SLJIT_FR0 == 1, float_register_index_start);
 470                         float_arg_count++;
 471                         if (float_arg_count != float_arg_count + word_arg_count)
 472                                 FAIL_IF(emit_sse2_load(compiler, (arg_types & SLJIT_ARG_MASK) == SLJIT_ARG_TYPE_F32,
 473                                         float_arg_count, float_arg_count + word_arg_count, 0));
 474 #endif /* _WIN64 */
 475                 }
 476                 arg_types >>= SLJIT_ARG_SHIFT;
 477         }
 478
 479         local_size = ((local_size + saved_regs_size + 0xf) & ~0xf) - saved_regs_size;
 480         compiler->local_size = local_size;
 481
 482 #ifdef _WIN64
 483         if (local_size > 0) {
 484                 if (local_size <= 4 * 4096) {
 485                         if (local_size > 4096)
 486                                 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096);
 487                         if (local_size > 2 * 4096)
 488                                 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 2);
 489                         if (local_size > 3 * 4096)
 490                                 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -4096 * 3);
 491                 }
 492                 else {
 493                         EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_IMM, local_size >> 12);
 494
 495                         EMIT_MOV(compiler, TMP_REG2, 0, SLJIT_MEM1(SLJIT_SP), -4096);
 496                         BINARY_IMM32(SUB, 4096, SLJIT_SP, 0);
 497                         BINARY_IMM32(SUB, 1, TMP_REG1, 0);
 498
 499                         inst = (sljit_u8*)ensure_buf(compiler, 1 + 2);
 500                         FAIL_IF(!inst);
 501
 502                         INC_SIZE(2);
 503                         inst[0] = JNE_i8;
 504                         inst[1] = (sljit_u8)-21;
 505                         local_size &= 0xfff;
 506                 }
 507
 508                 if (local_size > 0)
 509                         EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_MEM1(SLJIT_SP), -local_size);
 510         }
 511 #endif /* _WIN64 */
 512
 513         if (local_size > 0)
 514                 BINARY_IMM32(SUB, local_size, SLJIT_SP, 0);
 515
 516 #ifdef _WIN64
 517         if (saved_float_regs_size > 0) {
 518                 compiler->mode32 = 1;
 519
 520                 tmp = SLJIT_FS0 - fsaveds;
 521                 for (i = SLJIT_FS0; i > tmp; i--) {
 522                         inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset);
 523                         *inst++ = GROUP_0F;
 524                         *inst = MOVAPS_xm_x;
 525                         saved_float_regs_offset += 16;
 526                 }
 527
 528                 for (i = fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) {
 529                         inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset);
 530                         *inst++ = GROUP_0F;
 531                         *inst = MOVAPS_xm_x;
 532                         saved_float_regs_offset += 16;
 533                 }
 534         }
 535 #endif /* _WIN64 */
 536
 537         return SLJIT_SUCCESS;
 538 }
 539
 540 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
 541         sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
 542         sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
 543 {
 544         sljit_s32 saved_regs_size;
 545 #ifdef _WIN64
 546         sljit_s32 saved_float_regs_size;
 547 #endif /* _WIN64 */
 548
 549         CHECK_ERROR();
 550         CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
 551         set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
 552
 553 #ifdef _WIN64
 554         local_size += SLJIT_LOCALS_OFFSET;
 555         saved_float_regs_size = GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, 16);
 556
 557         if (saved_float_regs_size > 0)
 558                 local_size = ((local_size + 0xf) & ~0xf) + saved_float_regs_size;
 559 #else /* !_WIN64 */
 560         SLJIT_ASSERT(SLJIT_LOCALS_OFFSET == 0);
 561 #endif /* _WIN64 */
 562
 563         /* Including the return address saved by the call instruction. */
 564         saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
 565         compiler->local_size = ((local_size + saved_regs_size + 0xf) & ~0xf) - saved_regs_size;
 566         return SLJIT_SUCCESS;
 567 }
 568
 569 static sljit_s32 emit_stack_frame_release(struct sljit_compiler *compiler)
 570 {
 571         sljit_uw size;
 572         sljit_s32 i, tmp;
 573         sljit_u8 *inst;
 574 #ifdef _WIN64
 575         sljit_s32 saved_float_regs_offset;
 576         sljit_s32 fscratches = compiler->fscratches;
 577         sljit_s32 fsaveds = compiler->fsaveds;
 578 #endif /* _WIN64 */
 579
 580 #ifdef _WIN64
 581         saved_float_regs_offset = GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, 16);
 582
 583         if (saved_float_regs_offset > 0) {
 584                 compiler->mode32 = 1;
 585                 saved_float_regs_offset = (compiler->local_size - saved_float_regs_offset) & ~0xf;
 586
 587                 tmp = SLJIT_FS0 - fsaveds;
 588                 for (i = SLJIT_FS0; i > tmp; i--) {
 589                         inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset);
 590                         *inst++ = GROUP_0F;
 591                         *inst = MOVAPS_x_xm;
 592                         saved_float_regs_offset += 16;
 593                 }
 594
 595                 for (i = fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) {
 596                         inst = emit_x86_instruction(compiler, 2 | EX86_SSE2, i, 0, SLJIT_MEM1(SLJIT_SP), saved_float_regs_offset);
 597                         *inst++ = GROUP_0F;
 598                         *inst = MOVAPS_x_xm;
 599                         saved_float_regs_offset += 16;
 600                 }
 601         }
 602 #endif /* _WIN64 */
 603
 604         if (compiler->local_size > 0) {
 605                 if (compiler->local_size <= 127) {
 606                         inst = (sljit_u8*)ensure_buf(compiler, 1 + 4);
 607                         FAIL_IF(!inst);
 608                         INC_SIZE(4);
 609                         *inst++ = REX_W;
 610                         *inst++ = GROUP_BINARY_83;
 611                         *inst++ = MOD_REG | ADD | 4;
 612                         *inst = U8(compiler->local_size);
 613                 }
 614                 else {
 615                         inst = (sljit_u8*)ensure_buf(compiler, 1 + 7);
 616                         FAIL_IF(!inst);
 617                         INC_SIZE(7);
 618                         *inst++ = REX_W;
 619                         *inst++ = GROUP_BINARY_81;
 620                         *inst++ = MOD_REG | ADD | 4;
 621                         sljit_unaligned_store_s32(inst, compiler->local_size);
 622                 }
 623         }
 624
 625         tmp = compiler->scratches;
 626         for (i = SLJIT_FIRST_SAVED_REG; i <= tmp; i++) {
 627                 size = reg_map[i] >= 8 ? 2 : 1;
 628                 inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
 629                 FAIL_IF(!inst);
 630                 INC_SIZE(size);
 631                 if (reg_map[i] >= 8)
 632                         *inst++ = REX_B;
 633                 POP_REG(reg_lmap[i]);
 634         }
 635
 636         tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
 637         for (i = tmp; i <= SLJIT_S0; i++) {
 638                 size = reg_map[i] >= 8 ? 2 : 1;
 639                 inst = (sljit_u8*)ensure_buf(compiler, 1 + size);
 640                 FAIL_IF(!inst);
 641                 INC_SIZE(size);
 642                 if (reg_map[i] >= 8)
 643                         *inst++ = REX_B;
 644                 POP_REG(reg_lmap[i]);
 645         }
 646
 647         return SLJIT_SUCCESS;
 648 }
 649
 650 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return_void(struct sljit_compiler *compiler)
 651 {
 652         sljit_u8 *inst;
 653
 654         CHECK_ERROR();
 655         CHECK(check_sljit_emit_return_void(compiler));
 656
 657         FAIL_IF(emit_stack_frame_release(compiler));
 658
 659         inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
 660         FAIL_IF(!inst);
 661         INC_SIZE(1);
 662         RET();
 663         return SLJIT_SUCCESS;
 664 }
 665
 666 /* --------------------------------------------------------------------- */
 667 /*  Call / return instructions                                           */
 668 /* --------------------------------------------------------------------- */
 669
 670 #ifndef _WIN64
 671
 672 static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src_ptr)
 673 {
 674         sljit_s32 src = src_ptr ? (*src_ptr) : 0;
 675         sljit_s32 word_arg_count = 0;
 676
 677         SLJIT_ASSERT(reg_map[SLJIT_R1] == 6 && reg_map[SLJIT_R3] == 1 && reg_map[TMP_REG1] == 2);
 678         SLJIT_ASSERT(!(src & SLJIT_MEM));
 679
 680         /* Remove return value. */
 681         arg_types >>= SLJIT_ARG_SHIFT;
 682
 683         while (arg_types) {
 684                 if ((arg_types & SLJIT_ARG_MASK) < SLJIT_ARG_TYPE_F64)
 685                         word_arg_count++;
 686                 arg_types >>= SLJIT_ARG_SHIFT;
 687         }
 688
 689         if (word_arg_count == 0)
 690                 return SLJIT_SUCCESS;
 691
 692         if (word_arg_count >= 3) {
 693                 if (src == SLJIT_R2)
 694                         *src_ptr = TMP_REG1;
 695                 EMIT_MOV(compiler, TMP_REG1, 0, SLJIT_R2, 0);
 696         }
 697
 698         return emit_mov(compiler, SLJIT_R2, 0, SLJIT_R0, 0);
 699 }
 700
 701 #else
 702
 703 static sljit_s32 call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src_ptr)
 704 {
 705         sljit_s32 src = src_ptr ? (*src_ptr) : 0;
 706         sljit_s32 arg_count = 0;
 707         sljit_s32 word_arg_count = 0;
 708         sljit_s32 float_arg_count = 0;
 709         sljit_s32 types = 0;
 710         sljit_s32 data_trandfer = 0;
 711         static sljit_u8 word_arg_regs[5] = { 0, SLJIT_R3, SLJIT_R1, SLJIT_R2, TMP_REG1 };
 712
 713         SLJIT_ASSERT(reg_map[SLJIT_R3] == 1 && reg_map[SLJIT_R1] == 2 && reg_map[SLJIT_R2] == 8 && reg_map[TMP_REG1] == 9);
 714         SLJIT_ASSERT(!(src & SLJIT_MEM));
 715
 716         arg_types >>= SLJIT_ARG_SHIFT;
 717
 718         while (arg_types) {
 719                 types = (types << SLJIT_ARG_SHIFT) | (arg_types & SLJIT_ARG_MASK);
 720
 721                 switch (arg_types & SLJIT_ARG_MASK) {
 722                 case SLJIT_ARG_TYPE_F64:
 723                 case SLJIT_ARG_TYPE_F32:
 724                         arg_count++;
 725                         float_arg_count++;
 726
 727                         if (arg_count != float_arg_count)
 728                                 data_trandfer = 1;
 729                         break;
 730                 default:
 731                         arg_count++;
 732                         word_arg_count++;
 733
 734                         if (arg_count != word_arg_count || arg_count != word_arg_regs[arg_count]) {
 735                                 data_trandfer = 1;
 736
 737                                 if (src == word_arg_regs[arg_count]) {
 738                                         EMIT_MOV(compiler, TMP_REG2, 0, src, 0);
 739                                         *src_ptr = TMP_REG2;
 740                                 }
 741                         }
 742                         break;
 743                 }
 744
 745                 arg_types >>= SLJIT_ARG_SHIFT;
 746         }
 747
 748         if (!data_trandfer)
 749                 return SLJIT_SUCCESS;
 750
 751         while (types) {
 752                 switch (types & SLJIT_ARG_MASK) {
 753                 case SLJIT_ARG_TYPE_F64:
 754                         if (arg_count != float_arg_count)
 755                                 FAIL_IF(emit_sse2_load(compiler, 0, arg_count, float_arg_count, 0));
 756                         arg_count--;
 757                         float_arg_count--;
 758                         break;
 759                 case SLJIT_ARG_TYPE_F32:
 760                         if (arg_count != float_arg_count)
 761                                 FAIL_IF(emit_sse2_load(compiler, 1, arg_count, float_arg_count, 0));
 762                         arg_count--;
 763                         float_arg_count--;
 764                         break;
 765                 default:
 766                         if (arg_count != word_arg_count || arg_count != word_arg_regs[arg_count])
 767                                 EMIT_MOV(compiler, word_arg_regs[arg_count], 0, word_arg_count, 0);
 768                         arg_count--;
 769                         word_arg_count--;
 770                         break;
 771                 }
 772
 773                 types >>= SLJIT_ARG_SHIFT;
 774         }
 775
 776         return SLJIT_SUCCESS;
 777 }
 778
 779 #endif
 780
 781 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
 782         sljit_s32 arg_types)
 783 {
 784         CHECK_ERROR_PTR();
 785         CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
 786
 787         compiler->mode32 = 0;
 788
 789         PTR_FAIL_IF(call_with_args(compiler, arg_types, NULL));
 790
 791         if (type & SLJIT_CALL_RETURN) {
 792                 PTR_FAIL_IF(emit_stack_frame_release(compiler));
 793                 type = SLJIT_JUMP | (type & SLJIT_REWRITABLE_JUMP);
 794         }
 795
 796 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 797                 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 798         compiler->skip_checks = 1;
 799 #endif
 800         return sljit_emit_jump(compiler, type);
 801 }
 802
 803 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
 804         sljit_s32 arg_types,
 805         sljit_s32 src, sljit_sw srcw)
 806 {
 807         CHECK_ERROR();
 808         CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
 809
 810         compiler->mode32 = 0;
 811
 812         if (src & SLJIT_MEM) {
 813                 ADJUST_LOCAL_OFFSET(src, srcw);
 814                 EMIT_MOV(compiler, TMP_REG2, 0, src, srcw);
 815                 src = TMP_REG2;
 816         }
 817
 818         if (type & SLJIT_CALL_RETURN) {
 819                 if (src >= SLJIT_FIRST_SAVED_REG && src <= SLJIT_S0) {
 820                         EMIT_MOV(compiler, TMP_REG2, 0, src, srcw);
 821                         src = TMP_REG2;
 822                 }
 823
 824                 FAIL_IF(emit_stack_frame_release(compiler));
 825                 type = SLJIT_JUMP;
 826         }
 827
 828         FAIL_IF(call_with_args(compiler, arg_types, &src));
 829
 830 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
 831                 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
 832         compiler->skip_checks = 1;
 833 #endif
 834
 835         return sljit_emit_ijump(compiler, type, src, srcw);
 836 }
 837
 838 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
 839 {
 840         sljit_u8 *inst;
 841
 842         CHECK_ERROR();
 843         CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
 844         ADJUST_LOCAL_OFFSET(dst, dstw);
 845
 846         if (FAST_IS_REG(dst)) {
 847                 if (reg_map[dst] < 8) {
 848                         inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
 849                         FAIL_IF(!inst);
 850                         INC_SIZE(1);
 851                         POP_REG(reg_lmap[dst]);
 852                         return SLJIT_SUCCESS;
 853                 }
 854
 855                 inst = (sljit_u8*)ensure_buf(compiler, 1 + 2);
 856                 FAIL_IF(!inst);
 857                 INC_SIZE(2);
 858                 *inst++ = REX_B;
 859                 POP_REG(reg_lmap[dst]);
 860                 return SLJIT_SUCCESS;
 861         }
 862
 863         /* REX_W is not necessary (src is not immediate). */
 864         compiler->mode32 = 1;
 865         inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
 866         FAIL_IF(!inst);
 867         *inst++ = POP_rm;
 868         return SLJIT_SUCCESS;
 869 }
 870
 871 static sljit_s32 emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
 872 {
 873         sljit_u8 *inst;
 874
 875         if (FAST_IS_REG(src)) {
 876                 if (reg_map[src] < 8) {
 877                         inst = (sljit_u8*)ensure_buf(compiler, 1 + 1 + 1);
 878                         FAIL_IF(!inst);
 879
 880                         INC_SIZE(1 + 1);
 881                         PUSH_REG(reg_lmap[src]);
 882                 }
 883                 else {
 884                         inst = (sljit_u8*)ensure_buf(compiler, 1 + 2 + 1);
 885                         FAIL_IF(!inst);
 886
 887                         INC_SIZE(2 + 1);
 888                         *inst++ = REX_B;
 889                         PUSH_REG(reg_lmap[src]);
 890                 }
 891         }
 892         else {
 893                 /* REX_W is not necessary (src is not immediate). */
 894                 compiler->mode32 = 1;
 895                 inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
 896                 FAIL_IF(!inst);
 897                 *inst++ = GROUP_FF;
 898                 *inst |= PUSH_rm;
 899
 900                 inst = (sljit_u8*)ensure_buf(compiler, 1 + 1);
 901                 FAIL_IF(!inst);
 902                 INC_SIZE(1);
 903         }
 904
 905         RET();
 906         return SLJIT_SUCCESS;
 907 }
 908
 909 /* --------------------------------------------------------------------- */
 910 /*  Extend input                                                         */
 911 /* --------------------------------------------------------------------- */
 912
 913 static sljit_s32 emit_mov_int(struct sljit_compiler *compiler, sljit_s32 sign,
 914         sljit_s32 dst, sljit_sw dstw,
 915         sljit_s32 src, sljit_sw srcw)
 916 {
 917         sljit_u8* inst;
 918         sljit_s32 dst_r;
 919
 920         compiler->mode32 = 0;
 921
 922         if (src & SLJIT_IMM) {
 923                 if (FAST_IS_REG(dst)) {
 924                         if (sign || ((sljit_uw)srcw <= 0x7fffffff)) {
 925                                 inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_s32)srcw, dst, dstw);
 926                                 FAIL_IF(!inst);
 927                                 *inst = MOV_rm_i32;
 928                                 return SLJIT_SUCCESS;
 929                         }
 930                         return emit_load_imm64(compiler, dst, srcw);
 931                 }
 932                 compiler->mode32 = 1;
 933                 inst = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_sw)(sljit_s32)srcw, dst, dstw);
 934                 FAIL_IF(!inst);
 935                 *inst = MOV_rm_i32;
 936                 compiler->mode32 = 0;
 937                 return SLJIT_SUCCESS;
 938         }
 939
 940         dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
 941
 942         if ((dst & SLJIT_MEM) && FAST_IS_REG(src))
 943                 dst_r = src;
 944         else {
 945                 if (sign) {
 946                         inst = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw);
 947                         FAIL_IF(!inst);
 948                         *inst++ = MOVSXD_r_rm;
 949                 } else {
 950                         compiler->mode32 = 1;
 951                         FAIL_IF(emit_mov(compiler, dst_r, 0, src, srcw));
 952                         compiler->mode32 = 0;
 953                 }
 954         }
 955
 956         if (dst & SLJIT_MEM) {
 957                 compiler->mode32 = 1;
 958                 inst = emit_x86_instruction(compiler, 1, dst_r, 0, dst, dstw);
 959                 FAIL_IF(!inst);
 960                 *inst = MOV_rm_r;
 961                 compiler->mode32 = 0;
 962         }
 963
 964         return SLJIT_SUCCESS;
 965 }
 966
 967 static sljit_s32 skip_frames_before_return(struct sljit_compiler *compiler)
 968 {
 969         sljit_s32 tmp, size;
 970
 971         /* Don't adjust shadow stack if it isn't enabled.  */
 972         if (!cpu_has_shadow_stack())
 973                 return SLJIT_SUCCESS;
 974
 975         size = compiler->local_size;
 976         tmp = compiler->scratches;
 977         if (tmp >= SLJIT_FIRST_SAVED_REG)
 978                 size += (tmp - SLJIT_FIRST_SAVED_REG + 1) * SSIZE_OF(sw);
 979         tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
 980         if (SLJIT_S0 >= tmp)
 981                 size += (SLJIT_S0 - tmp + 1) * SSIZE_OF(sw);
 982
 983         return adjust_shadow_stack(compiler, SLJIT_MEM1(SLJIT_SP), size);
 984 }