source/libs/luajit/LuaJIT-src/src/lj_arch.h

   1 /*
   2 ** Target architecture selection.
   3 ** Copyright (C) 2005-2016 Mike Pall. See Copyright Notice in luajit.h
   4 */
   5
   6 #ifndef _LJ_ARCH_H
   7 #define _LJ_ARCH_H
   8
   9 #include "lua.h"
  10
  11 /* Target endianess. */
  12 #define LUAJIT_LE       0
  13 #define LUAJIT_BE       1
  14
  15 /* Target architectures. */
  16 #define LUAJIT_ARCH_X86         1
  17 #define LUAJIT_ARCH_x86         1
  18 #define LUAJIT_ARCH_X64         2
  19 #define LUAJIT_ARCH_x64         2
  20 #define LUAJIT_ARCH_ARM         3
  21 #define LUAJIT_ARCH_arm         3
  22 #define LUAJIT_ARCH_ARM64       4
  23 #define LUAJIT_ARCH_arm64       4
  24 #define LUAJIT_ARCH_PPC         5
  25 #define LUAJIT_ARCH_ppc         5
  26 #define LUAJIT_ARCH_MIPS        6
  27 #define LUAJIT_ARCH_mips        6
  28
  29 /* Target OS. */
  30 #define LUAJIT_OS_OTHER         0
  31 #define LUAJIT_OS_WINDOWS       1
  32 #define LUAJIT_OS_LINUX         2
  33 #define LUAJIT_OS_OSX           3
  34 #define LUAJIT_OS_BSD           4
  35 #define LUAJIT_OS_POSIX         5
  36
  37 /* Select native target if no target defined. */
  38 #ifndef LUAJIT_TARGET
  39
  40 #if defined(__i386) || defined(__i386__) || defined(_M_IX86)
  41 #define LUAJIT_TARGET   LUAJIT_ARCH_X86
  42 #elif defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)
  43 #define LUAJIT_TARGET   LUAJIT_ARCH_X64
  44 #elif defined(__arm__) || defined(__arm) || defined(__ARM__) || defined(__ARM)
  45 #define LUAJIT_TARGET   LUAJIT_ARCH_ARM
  46 #elif defined(__aarch64__)
  47 #define LUAJIT_TARGET   LUAJIT_ARCH_ARM64
  48 #elif defined(__ppc__) || defined(__ppc) || defined(__PPC__) || defined(__PPC) || defined(__powerpc__) || defined(__powerpc) || defined(__POWERPC__) || defined(__POWERPC) || defined(_M_PPC)
  49 #define LUAJIT_TARGET   LUAJIT_ARCH_PPC
  50 #elif defined(__mips__) || defined(__mips) || defined(__MIPS__) || defined(__MIPS)
  51 #define LUAJIT_TARGET   LUAJIT_ARCH_MIPS
  52 #else
  53 #error "No support for this architecture (yet)"
  54 #endif
  55
  56 #endif
  57
  58 /* Select native OS if no target OS defined. */
  59 #ifndef LUAJIT_OS
  60
  61 #if defined(_WIN32) && !defined(_XBOX_VER)
  62 #define LUAJIT_OS       LUAJIT_OS_WINDOWS
  63 #elif defined(__linux__)
  64 #define LUAJIT_OS       LUAJIT_OS_LINUX
  65 #elif defined(__MACH__) && defined(__APPLE__)
  66 #define LUAJIT_OS       LUAJIT_OS_OSX
  67 #elif (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
  68        defined(__NetBSD__) || defined(__OpenBSD__) || \
  69        defined(__DragonFly__)) && !defined(__ORBIS__)
  70 #define LUAJIT_OS       LUAJIT_OS_BSD
  71 #elif (defined(__sun__) && defined(__svr4__)) || defined(__CYGWIN__)
  72 #define LUAJIT_OS       LUAJIT_OS_POSIX
  73 #else
  74 #define LUAJIT_OS       LUAJIT_OS_OTHER
  75 #endif
  76
  77 #endif
  78
  79 /* Set target OS properties. */
  80 #if LUAJIT_OS == LUAJIT_OS_WINDOWS
  81 #define LJ_OS_NAME      "Windows"
  82 #elif LUAJIT_OS == LUAJIT_OS_LINUX
  83 #define LJ_OS_NAME      "Linux"
  84 #elif LUAJIT_OS == LUAJIT_OS_OSX
  85 #define LJ_OS_NAME      "OSX"
  86 #elif LUAJIT_OS == LUAJIT_OS_BSD
  87 #define LJ_OS_NAME      "BSD"
  88 #elif LUAJIT_OS == LUAJIT_OS_POSIX
  89 #define LJ_OS_NAME      "POSIX"
  90 #else
  91 #define LJ_OS_NAME      "Other"
  92 #endif
  93
  94 #define LJ_TARGET_WINDOWS       (LUAJIT_OS == LUAJIT_OS_WINDOWS)
  95 #define LJ_TARGET_LINUX         (LUAJIT_OS == LUAJIT_OS_LINUX)
  96 #define LJ_TARGET_OSX           (LUAJIT_OS == LUAJIT_OS_OSX)
  97 #define LJ_TARGET_IOS           (LJ_TARGET_OSX && (LUAJIT_TARGET == LUAJIT_ARCH_ARM || LUAJIT_TARGET == LUAJIT_ARCH_ARM64))
  98 #define LJ_TARGET_POSIX         (LUAJIT_OS > LUAJIT_OS_WINDOWS)
  99 #define LJ_TARGET_DLOPEN        LJ_TARGET_POSIX
 100
 101 #ifdef __CELLOS_LV2__
 102 #define LJ_TARGET_PS3           1
 103 #define LJ_TARGET_CONSOLE       1
 104 #endif
 105
 106 #ifdef __ORBIS__
 107 #define LJ_TARGET_PS4           1
 108 #define LJ_TARGET_CONSOLE       1
 109 #undef NULL
 110 #define NULL ((void*)0)
 111 #endif
 112
 113 #ifdef __psp2__
 114 #define LJ_TARGET_PSVITA        1
 115 #define LJ_TARGET_CONSOLE       1
 116 #endif
 117
 118 #if _XBOX_VER >= 200
 119 #define LJ_TARGET_XBOX360       1
 120 #define LJ_TARGET_CONSOLE       1
 121 #endif
 122
 123 #ifdef _DURANGO
 124 #define LJ_TARGET_XBOXONE       1
 125 #define LJ_TARGET_CONSOLE       1
 126 #define LJ_TARGET_GC64          1
 127 #endif
 128
 129 #define LJ_NUMMODE_SINGLE       0       /* Single-number mode only. */
 130 #define LJ_NUMMODE_SINGLE_DUAL  1       /* Default to single-number mode. */
 131 #define LJ_NUMMODE_DUAL         2       /* Dual-number mode only. */
 132 #define LJ_NUMMODE_DUAL_SINGLE  3       /* Default to dual-number mode. */
 133
 134 /* Set target architecture properties. */
 135 #if LUAJIT_TARGET == LUAJIT_ARCH_X86
 136
 137 #define LJ_ARCH_NAME            "x86"
 138 #define LJ_ARCH_BITS            32
 139 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 140 #if LJ_TARGET_WINDOWS || __CYGWIN__
 141 #define LJ_ABI_WIN              1
 142 #else
 143 #define LJ_ABI_WIN              0
 144 #endif
 145 #define LJ_TARGET_X86           1
 146 #define LJ_TARGET_X86ORX64      1
 147 #define LJ_TARGET_EHRETREG      0
 148 #define LJ_TARGET_MASKSHIFT     1
 149 #define LJ_TARGET_MASKROT       1
 150 #define LJ_TARGET_UNALIGNED     1
 151 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_SINGLE_DUAL
 152
 153 #elif LUAJIT_TARGET == LUAJIT_ARCH_X64
 154
 155 #define LJ_ARCH_NAME            "x64"
 156 #define LJ_ARCH_BITS            64
 157 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 158 #if LJ_TARGET_WINDOWS || __CYGWIN__
 159 #define LJ_ABI_WIN              1
 160 #else
 161 #define LJ_ABI_WIN              0
 162 #endif
 163 #define LJ_TARGET_X64           1
 164 #define LJ_TARGET_X86ORX64      1
 165 #define LJ_TARGET_EHRETREG      0
 166 #define LJ_TARGET_JUMPRANGE     31      /* +-2^31 = +-2GB */
 167 #define LJ_TARGET_MASKSHIFT     1
 168 #define LJ_TARGET_MASKROT       1
 169 #define LJ_TARGET_UNALIGNED     1
 170 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_SINGLE_DUAL
 171 #ifdef LUAJIT_ENABLE_GC64
 172 #define LJ_TARGET_GC64          1
 173 #endif
 174
 175 #elif LUAJIT_TARGET == LUAJIT_ARCH_ARM
 176
 177 #define LJ_ARCH_NAME            "arm"
 178 #define LJ_ARCH_BITS            32
 179 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 180 #if !defined(LJ_ARCH_HASFPU) && __SOFTFP__
 181 #define LJ_ARCH_HASFPU          0
 182 #endif
 183 #if !defined(LJ_ABI_SOFTFP) && !__ARM_PCS_VFP
 184 #define LJ_ABI_SOFTFP           1
 185 #endif
 186 #define LJ_ABI_EABI             1
 187 #define LJ_TARGET_ARM           1
 188 #define LJ_TARGET_EHRETREG      0
 189 #define LJ_TARGET_JUMPRANGE     25      /* +-2^25 = +-32MB */
 190 #define LJ_TARGET_MASKSHIFT     0
 191 #define LJ_TARGET_MASKROT       1
 192 #define LJ_TARGET_UNIFYROT      2       /* Want only IR_BROR. */
 193 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_DUAL
 194
 195 #if __ARM_ARCH____ARM_ARCH_8__ || __ARM_ARCH_8A__
 196 #define LJ_ARCH_VERSION         80
 197 #elif __ARM_ARCH_7__ || __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH_7S__ || __ARM_ARCH_7VE__
 198 #define LJ_ARCH_VERSION         70
 199 #elif __ARM_ARCH_6T2__
 200 #define LJ_ARCH_VERSION         61
 201 #elif __ARM_ARCH_6__ || __ARM_ARCH_6J__ || __ARM_ARCH_6K__ || __ARM_ARCH_6Z__ || __ARM_ARCH_6ZK__
 202 #define LJ_ARCH_VERSION         60
 203 #else
 204 #define LJ_ARCH_VERSION         50
 205 #endif
 206
 207 #elif LUAJIT_TARGET == LUAJIT_ARCH_ARM64
 208
 209 #define LJ_ARCH_NAME            "arm64"
 210 #define LJ_ARCH_BITS            64
 211 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 212 #define LJ_TARGET_ARM64         1
 213 #define LJ_TARGET_EHRETREG      0
 214 #define LJ_TARGET_JUMPRANGE     27      /* +-2^27 = +-128MB */
 215 #define LJ_TARGET_MASKSHIFT     1
 216 #define LJ_TARGET_MASKROT       1
 217 #define LJ_TARGET_UNIFYROT      2       /* Want only IR_BROR. */
 218 #define LJ_TARGET_GC64          1
 219 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_DUAL
 220 #define LJ_ARCH_NOJIT           1       /* NYI */
 221
 222 #define LJ_ARCH_VERSION         80
 223
 224 #elif LUAJIT_TARGET == LUAJIT_ARCH_PPC
 225
 226 #ifndef LJ_ARCH_ENDIAN
 227 #if __BYTE_ORDER__ != __ORDER_BIG_ENDIAN__
 228 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 229 #else
 230 #define LJ_ARCH_ENDIAN          LUAJIT_BE
 231 #endif
 232 #endif
 233
 234 #if _LP64
 235 #define LJ_ARCH_BITS            64
 236 #if LJ_ARCH_ENDIAN == LUAJIT_LE
 237 #define LJ_ARCH_NAME            "ppc64le"
 238 #else
 239 #define LJ_ARCH_NAME            "ppc64"
 240 #endif
 241 #else
 242 #define LJ_ARCH_BITS            32
 243 #define LJ_ARCH_NAME            "ppc"
 244 #endif
 245
 246 #define LJ_TARGET_PPC           1
 247 #define LJ_TARGET_EHRETREG      3
 248 #define LJ_TARGET_JUMPRANGE     25      /* +-2^25 = +-32MB */
 249 #define LJ_TARGET_MASKSHIFT     0
 250 #define LJ_TARGET_MASKROT       1
 251 #define LJ_TARGET_UNIFYROT      1       /* Want only IR_BROL. */
 252 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_DUAL_SINGLE
 253
 254 #if LJ_TARGET_CONSOLE
 255 #define LJ_ARCH_PPC32ON64       1
 256 #define LJ_ARCH_NOFFI           1
 257 #elif LJ_ARCH_BITS == 64
 258 #define LJ_ARCH_PPC64           1
 259 #define LJ_TARGET_GC64          1
 260 #define LJ_ARCH_NOJIT           1       /* NYI */
 261 #endif
 262
 263 #if _ARCH_PWR7
 264 #define LJ_ARCH_VERSION         70
 265 #elif _ARCH_PWR6
 266 #define LJ_ARCH_VERSION         60
 267 #elif _ARCH_PWR5X
 268 #define LJ_ARCH_VERSION         51
 269 #elif _ARCH_PWR5
 270 #define LJ_ARCH_VERSION         50
 271 #elif _ARCH_PWR4
 272 #define LJ_ARCH_VERSION         40
 273 #else
 274 #define LJ_ARCH_VERSION         0
 275 #endif
 276 #if _ARCH_PPCSQ
 277 #define LJ_ARCH_SQRT            1
 278 #endif
 279 #if _ARCH_PWR5X
 280 #define LJ_ARCH_ROUND           1
 281 #endif
 282 #if __PPU__
 283 #define LJ_ARCH_CELL            1
 284 #endif
 285 #if LJ_TARGET_XBOX360
 286 #define LJ_ARCH_XENON           1
 287 #endif
 288
 289 #elif LUAJIT_TARGET == LUAJIT_ARCH_MIPS
 290
 291 #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL)
 292 #define LJ_ARCH_NAME            "mipsel"
 293 #define LJ_ARCH_ENDIAN          LUAJIT_LE
 294 #else
 295 #define LJ_ARCH_NAME            "mips"
 296 #define LJ_ARCH_ENDIAN          LUAJIT_BE
 297 #endif
 298
 299 #if !defined(LJ_ARCH_HASFPU)
 300 #ifdef __mips_soft_float
 301 #define LJ_ARCH_HASFPU          0
 302 #else
 303 #define LJ_ARCH_HASFPU          1
 304 #endif
 305 #endif
 306
 307 /* Temporarily disable features until the code has been merged. */
 308 #if !defined(LUAJIT_NO_UNWIND) && __GNU_COMPACT_EH__
 309 #define LUAJIT_NO_UNWIND        1
 310 #endif
 311
 312 #if !defined(LJ_ABI_SOFTFP)
 313 #ifdef __mips_soft_float
 314 #define LJ_ABI_SOFTFP           1
 315 #else
 316 #define LJ_ABI_SOFTFP           0
 317 #endif
 318 #endif
 319
 320 #define LJ_ARCH_BITS            32
 321 #define LJ_TARGET_MIPS          1
 322 #define LJ_TARGET_EHRETREG      4
 323 #define LJ_TARGET_JUMPRANGE     27      /* 2*2^27 = 256MB-aligned region */
 324 #define LJ_TARGET_MASKSHIFT     1
 325 #define LJ_TARGET_MASKROT       1
 326 #define LJ_TARGET_UNIFYROT      2       /* Want only IR_BROR. */
 327 #define LJ_ARCH_NUMMODE         LJ_NUMMODE_DUAL
 328
 329 #if _MIPS_ARCH_MIPS32R2
 330 #define LJ_ARCH_VERSION         20
 331 #else
 332 #define LJ_ARCH_VERSION         10
 333 #endif
 334
 335 #else
 336 #error "No target architecture defined"
 337 #endif
 338
 339 #ifndef LJ_PAGESIZE
 340 #define LJ_PAGESIZE             4096
 341 #endif
 342
 343 /* Check for minimum required compiler versions. */
 344 #if defined(__GNUC__)
 345 #if LJ_TARGET_X86
 346 #if (__GNUC__ < 3) || ((__GNUC__ == 3) && __GNUC_MINOR__ < 4)
 347 #error "Need at least GCC 3.4 or newer"
 348 #endif
 349 #elif LJ_TARGET_X64
 350 #if __GNUC__ < 4
 351 #error "Need at least GCC 4.0 or newer"
 352 #endif
 353 #elif LJ_TARGET_ARM || LJ_TARGET_PPC
 354 #if (__GNUC__ < 4) || ((__GNUC__ == 4) && __GNUC_MINOR__ < 2)
 355 #error "Need at least GCC 4.2 or newer"
 356 #endif
 357 #elif LJ_TARGET_ARM64
 358 #if __clang__
 359 #if (__clang_major__ < 3) || ((__clang_major__ == 3) && __clang_minor__ < 5)
 360 #error "Need at least Clang 3.5 or newer"
 361 #endif
 362 #else
 363 #if (__GNUC__ < 4) || ((__GNUC__ == 4) && __GNUC_MINOR__ < 8)
 364 #error "Need at least GCC 4.8 or newer"
 365 #endif
 366 #endif
 367 #elif !LJ_TARGET_PS3
 368 #if (__GNUC__ < 4) || ((__GNUC__ == 4) && __GNUC_MINOR__ < 3)
 369 #error "Need at least GCC 4.3 or newer"
 370 #endif
 371 #endif
 372 #endif
 373
 374 /* Check target-specific constraints. */
 375 #ifndef _BUILDVM_H
 376 #if LJ_TARGET_X64
 377 #if __USING_SJLJ_EXCEPTIONS__
 378 #error "Need a C compiler with native exception handling on x64"
 379 #endif
 380 #elif LJ_TARGET_ARM
 381 #if defined(__ARMEB__)
 382 #error "No support for big-endian ARM"
 383 #endif
 384 #if __ARM_ARCH_6M__ || __ARM_ARCH_7M__ || __ARM_ARCH_7EM__
 385 #error "No support for Cortex-M CPUs"
 386 #endif
 387 #if !(__ARM_EABI__ || LJ_TARGET_IOS)
 388 #error "Only ARM EABI or iOS 3.0+ ABI is supported"
 389 #endif
 390 #elif LJ_TARGET_ARM64
 391 #if defined(__AARCH64EB__)
 392 #error "No support for big-endian ARM64"
 393 #endif
 394 #if defined(_ILP32)
 395 #error "No support for ILP32 model on ARM64"
 396 #endif
 397 #elif LJ_TARGET_PPC
 398 #if defined(_SOFT_FLOAT) || defined(_SOFT_DOUBLE)
 399 #error "No support for PowerPC CPUs without double-precision FPU"
 400 #endif
 401 #if !LJ_ARCH_PPC64 && LJ_ARCH_ENDIAN == LUAJIT_LE
 402 #error "No support for little-endian PPC32"
 403 #endif
 404 #if LJ_ARCH_PPC64
 405 #error "No support for PowerPC 64 bit mode (yet)"
 406 #endif
 407 #ifdef __NO_FPRS__
 408 #error "No support for PPC/e500 anymore (use LuaJIT 2.0)"
 409 #endif
 410 #elif LJ_TARGET_MIPS
 411 #if defined(_LP64)
 412 #error "No support for MIPS64"
 413 #endif
 414 #endif
 415 #endif
 416
 417 /* Enable or disable the dual-number mode for the VM. */
 418 #if (LJ_ARCH_NUMMODE == LJ_NUMMODE_SINGLE && LUAJIT_NUMMODE == 2) || \
 419     (LJ_ARCH_NUMMODE == LJ_NUMMODE_DUAL && LUAJIT_NUMMODE == 1)
 420 #error "No support for this number mode on this architecture"
 421 #endif
 422 #if LJ_ARCH_NUMMODE == LJ_NUMMODE_DUAL || \
 423     (LJ_ARCH_NUMMODE == LJ_NUMMODE_DUAL_SINGLE && LUAJIT_NUMMODE != 1) || \
 424     (LJ_ARCH_NUMMODE == LJ_NUMMODE_SINGLE_DUAL && LUAJIT_NUMMODE == 2)
 425 #define LJ_DUALNUM              1
 426 #else
 427 #define LJ_DUALNUM              0
 428 #endif
 429
 430 #if LJ_TARGET_IOS || LJ_TARGET_CONSOLE
 431 /* Runtime code generation is restricted on iOS. Complain to Apple, not me. */
 432 /* Ditto for the consoles. Complain to Sony or MS, not me. */
 433 #ifndef LUAJIT_ENABLE_JIT
 434 #define LJ_OS_NOJIT             1
 435 #endif
 436 #endif
 437
 438 /* 64 bit GC references. */
 439 #if LJ_TARGET_GC64
 440 #define LJ_GC64                 1
 441 #else
 442 #define LJ_GC64                 0
 443 #endif
 444
 445 /* 2-slot frame info. */
 446 #if LJ_GC64
 447 #define LJ_FR2                  1
 448 #else
 449 #define LJ_FR2                  0
 450 #endif
 451
 452 /* Disable or enable the JIT compiler. */
 453 #if defined(LUAJIT_DISABLE_JIT) || defined(LJ_ARCH_NOJIT) || defined(LJ_OS_NOJIT) || LJ_FR2 || LJ_GC64
 454 #define LJ_HASJIT               0
 455 #else
 456 #define LJ_HASJIT               1
 457 #endif
 458
 459 /* Disable or enable the FFI extension. */
 460 #if defined(LUAJIT_DISABLE_FFI) || defined(LJ_ARCH_NOFFI)
 461 #define LJ_HASFFI               0
 462 #else
 463 #define LJ_HASFFI               1
 464 #endif
 465
 466 #if defined(LUAJIT_DISABLE_PROFILE)
 467 #define LJ_HASPROFILE           0
 468 #elif LJ_TARGET_POSIX
 469 #define LJ_HASPROFILE           1
 470 #define LJ_PROFILE_SIGPROF      1
 471 #elif LJ_TARGET_PS3
 472 #define LJ_HASPROFILE           1
 473 #define LJ_PROFILE_PTHREAD      1
 474 #elif LJ_TARGET_WINDOWS || LJ_TARGET_XBOX360
 475 #define LJ_HASPROFILE           1
 476 #define LJ_PROFILE_WTHREAD      1
 477 #else
 478 #define LJ_HASPROFILE           0
 479 #endif
 480
 481 #ifndef LJ_ARCH_HASFPU
 482 #define LJ_ARCH_HASFPU          1
 483 #endif
 484 #ifndef LJ_ABI_SOFTFP
 485 #define LJ_ABI_SOFTFP           0
 486 #endif
 487 #define LJ_SOFTFP               (!LJ_ARCH_HASFPU)
 488
 489 #if LJ_ARCH_ENDIAN == LUAJIT_BE
 490 #define LJ_LE                   0
 491 #define LJ_BE                   1
 492 #define LJ_ENDIAN_SELECT(le, be)        be
 493 #define LJ_ENDIAN_LOHI(lo, hi)          hi lo
 494 #else
 495 #define LJ_LE                   1
 496 #define LJ_BE                   0
 497 #define LJ_ENDIAN_SELECT(le, be)        le
 498 #define LJ_ENDIAN_LOHI(lo, hi)          lo hi
 499 #endif
 500
 501 #if LJ_ARCH_BITS == 32
 502 #define LJ_32                   1
 503 #define LJ_64                   0
 504 #else
 505 #define LJ_32                   0
 506 #define LJ_64                   1
 507 #endif
 508
 509 #ifndef LJ_TARGET_UNALIGNED
 510 #define LJ_TARGET_UNALIGNED     0
 511 #endif
 512
 513 /* Various workarounds for embedded operating systems or weak C runtimes. */
 514 #if defined(__ANDROID__) || defined(__symbian__) || LJ_TARGET_XBOX360 || LJ_TARGET_WINDOWS
 515 #define LUAJIT_NO_LOG2
 516 #endif
 517 #if defined(__symbian__) || LJ_TARGET_WINDOWS
 518 #define LUAJIT_NO_EXP2
 519 #endif
 520 #if LJ_TARGET_CONSOLE || (LJ_TARGET_IOS && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_8_0)
 521 #define LJ_NO_SYSTEM            1
 522 #endif
 523
 524 #if defined(LUAJIT_NO_UNWIND) || defined(__symbian__) || LJ_TARGET_IOS || LJ_TARGET_PS3 || LJ_TARGET_PS4
 525 #define LJ_NO_UNWIND            1
 526 #endif
 527
 528 /* Compatibility with Lua 5.1 vs. 5.2. */
 529 #ifdef LUAJIT_ENABLE_LUA52COMPAT
 530 #define LJ_52                   1
 531 #else
 532 #define LJ_52                   0
 533 #endif
 534
 535 #endif