compiler.h

   1 /*
   2  * Copyright (C) 2024 Mikulas Patocka
   3  *
   4  * This file is part of Ajla.
   5  *
   6  * Ajla is free software: you can redistribute it and/or modify it under the
   7  * terms of the GNU General Public License as published by the Free Software
   8  * Foundation, either version 3 of the License, or (at your option) any later
   9  * version.
  10  *
  11  * Ajla is distributed in the hope that it will be useful, but WITHOUT ANY
  12  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  13  * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * Ajla. If not, see <https://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifdef HAVE_STDINT_H
  20
  21 #include <stdint.h>
  22 #ifdef HAVE_INTTYPES_H
  23 #include <inttypes.h>
  24 #endif
  25
  26 #else
  27
  28 #ifdef HAVE_INT_T_U_INT_T
  29
  30 typedef u_int8_t uint8_t;
  31 typedef u_int16_t uint16_t;
  32 typedef u_int32_t uint32_t;
  33
  34 #else
  35
  36 typedef signed char int8_t;
  37 typedef unsigned char uint8_t;
  38
  39 #if SIZEOF_UNSIGNED_SHORT == 2
  40 typedef signed short int16_t;
  41 typedef unsigned short uint16_t;
  42 #else
  43 no type for int16_t
  44 #endif
  45
  46 #if SIZEOF_UNSIGNED == 4
  47 typedef signed int32_t;
  48 typedef unsigned uint32_t;
  49 #elif SIZEOF_UNSIGNED_LONG == 4
  50 typedef signed long int32_t;
  51 typedef unsigned long uint32_t;
  52 #else
  53 no type for int32_t
  54 #endif
  55
  56 #endif
  57
  58 #if defined(SIZEOF_UNSIGNED) && defined(SIZEOF_VOID_P) && SIZEOF_UNSIGNED && SIZEOF_UNSIGNED == SIZEOF_VOID_P
  59 typedef int intptr_t;
  60 typedef unsigned uintptr_t;
  61 #elif defined(SIZEOF_UNSIGNED_LONG) && defined(SIZEOF_VOID_P) && SIZEOF_UNSIGNED_LONG && SIZEOF_UNSIGNED_LONG == SIZEOF_VOID_P
  62 typedef long intptr_t;
  63 typedef unsigned long uintptr_t;
  64 #elif defined(SIZEOF_UNSIGNED_LONG_LONG) && defined(SIZEOF_VOID_P) && SIZEOF_UNSIGNED_LONG_LONG && SIZEOF_UNSIGNED_LONG_LONG == SIZEOF_VOID_P
  65 typedef long long intptr_t;
  66 typedef unsigned long long uintptr_t;
  67 #else
  68 typedef long intptr_t;
  69 typedef unsigned long uintptr_t;
  70 #endif
  71
  72
  73 #ifndef HAVE_INT64_T_UINT64_T
  74 #ifdef HAVE_INT64_T_U_INT64_T
  75 typedef u_int64_t uint64_t;
  76 #define HAVE_INT64_T_UINT64_T   1
  77 #elif defined(SIZEOF_UNSIGNED_LONG) && SIZEOF_UNSIGNED_LONG == 8
  78 typedef signed long int64_t;
  79 typedef unsigned long uint64_t;
  80 #define HAVE_INT64_T_UINT64_T   1
  81 #elif defined(SIZEOF_UNSIGNED_LONG_LONG) && SIZEOF_UNSIGNED_LONG_LONG == 8
  82 typedef signed long long int64_t;
  83 typedef unsigned long long uint64_t;
  84 #define HAVE_INT64_T_UINT64_T   1
  85 #elif defined(_MSC_VER) || defined(__BORLANDC__)
  86 typedef signed __int64 int64_t;
  87 typedef unsigned __int64 uint64_t;
  88 #define HAVE_INT64_T_UINT64_T   1
  89 #endif
  90 #endif
  91
  92 #ifdef HAVE_INT64_T_UINT64_T
  93 typedef int64_t intmax_t;
  94 typedef uint64_t uintmax_t;
  95 #else
  96 typedef long intmax_t;
  97 typedef unsigned long uintmax_t;
  98 #endif
  99
 100 #endif
 101
 102
 103 #if defined(SIZEOF_UNSIGNED___INT128) && SIZEOF_UNSIGNED___INT128 > 8
 104 typedef __int128 intbig_t;
 105 typedef unsigned __int128 uintbig_t;
 106 #else
 107 typedef intmax_t intbig_t;
 108 typedef uintmax_t uintbig_t;
 109 #endif
 110
 111
 112 #ifdef int8_t
 113 #undef int8_t
 114 #endif
 115 #ifdef int16_t
 116 #undef int16_t
 117 #endif
 118 #ifdef int32_t
 119 #undef int32_t
 120 #endif
 121 #ifdef int64_t
 122 #undef int64_t
 123 #endif
 124 #ifdef int128_t
 125 #undef int128_t
 126 #endif
 127 #ifdef uint8_t
 128 #undef uint8_t
 129 #endif
 130 #ifdef uint16_t
 131 #undef uint16_t
 132 #endif
 133 #ifdef uint32_t
 134 #undef uint32_t
 135 #endif
 136 #ifdef uint64_t
 137 #undef uint64_t
 138 #endif
 139 #ifdef uint128_t
 140 #undef uint128_t
 141 #endif
 142
 143
 144 #ifndef PRIdMAX
 145 #ifdef HAVE_LONG_LONG
 146 #define PRIdMAX "lld"
 147 #else
 148 #define PRIdMAX "ld"
 149 #endif
 150 #endif
 151
 152 #ifndef PRIuMAX
 153 #ifdef HAVE_LONG_LONG
 154 #define PRIuMAX "llu"
 155 #else
 156 #define PRIuMAX "lu"
 157 #endif
 158 #endif
 159
 160 #ifndef PRIxMAX
 161 #ifdef HAVE_LONG_LONG
 162 #define PRIxMAX "llx"
 163 #else
 164 #define PRIxMAX "lx"
 165 #endif
 166 #endif
 167
 168 #ifndef PRIXMAX
 169 #ifdef HAVE_LONG_LONG
 170 #define PRIXMAX "llX"
 171 #else
 172 #define PRIXMAX "lX"
 173 #endif
 174 #endif
 175
 176
 177 #ifdef HAVE_STDBOOL_H
 178 #include <stdbool.h>
 179 #endif
 180 #ifndef __bool_true_false_are_defined
 181 #define bool    char
 182 #define false   0
 183 #define true    1
 184 #endif
 185
 186 #ifndef HAVE_SOCKLEN_T
 187 #define socklen_t       int
 188 #endif
 189
 190 #ifndef HAVE_SIG_ATOMIC_T
 191 #define sig_atomic_t    int
 192 #endif
 193
 194 #ifdef HAVE_C11_ATOMICS
 195 #ifndef __cplusplus
 196 #include <stdatomic.h>
 197 #endif
 198 #define atomic_type             _Atomic
 199 #define load_relaxed(p)         atomic_load_explicit(p, memory_order_relaxed)
 200 #define store_relaxed(p, v)     atomic_store_explicit(p, v, memory_order_relaxed)
 201 #else
 202 #define atomic_type             volatile
 203 #define load_relaxed(p)         (*(p))
 204 #define store_relaxed(p, v)     (*(p) = (v))
 205 #endif
 206
 207
 208 #if defined(SIZEOF_VOID_P) && SIZEOF_VOID_P > 0
 209 #if SIZEOF_VOID_P >= 8
 210 #define BIT64
 211 #endif
 212 #elif defined(__INITIAL_POINTER_SIZE)
 213 #if __INITIAL_POINTER_SIZE >= 64
 214 #define BIT64
 215 #endif
 216 #elif defined(_LP64) || defined(__LP64__) || defined(_WIN64)
 217 #define BIT64
 218 #endif
 219
 220
 221 #ifndef UNUSUAL_UNKNOWN_ENDIAN
 222 #if defined(CONFIG_LITTLE_ENDIAN)
 223 #define C_LITTLE_ENDIAN
 224 #elif defined(CONFIG_BIG_ENDIAN)
 225 #define C_BIG_ENDIAN
 226 #elif defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 227 #define C_LITTLE_ENDIAN
 228 #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 229 #define C_BIG_ENDIAN
 230 #endif
 231 #endif
 232
 233
 234 #define extern_const            const
 235
 236
 237 #define stringify_internal(arg) #arg
 238 #define stringify(arg)          stringify_internal(arg)
 239 #define file_line               __FILE__ ":" stringify(__LINE__)
 240
 241
 242 /*
 243  * The defined() operator in macro expansion is not portable.
 244  */
 245 #if defined(__GNUC__) && defined(__GNUC_MINOR__)
 246 #define DEFINED___GNUC____GNUC_MINOR__  1
 247 #else
 248 #define DEFINED___GNUC____GNUC_MINOR__  0
 249 #endif
 250
 251 #if defined(__GNUC_PATCHLEVEL__)
 252 #define DEFINED___GNUC_PATCHLEVEL__     1
 253 #else
 254 #define DEFINED___GNUC_PATCHLEVEL__     0
 255 #endif
 256
 257 #define GNUC_ATLEAST(x, y, z)                                   \
 258         (DEFINED___GNUC____GNUC_MINOR__ &&                      \
 259          (__GNUC__ > (x) ||                                     \
 260           (__GNUC__ == (x) &&                                   \
 261            (__GNUC_MINOR__ > (y) ||                             \
 262             (__GNUC_MINOR__ == (y) &&                           \
 263              (!DEFINED___GNUC_PATCHLEVEL__ ||                   \
 264               __GNUC_PATCHLEVEL__ >= (z)                        \
 265              )                                                  \
 266             )                                                   \
 267            )                                                    \
 268           )                                                     \
 269          )                                                      \
 270         )
 271
 272 #if defined(__clang__) && defined(__clang_major__) && defined(__clang_minor__)
 273 #define DEFINED___CLANG____CLANG_MAJOR____CLANG_MINOR__ 1
 274 #else
 275 #define DEFINED___CLANG____CLANG_MAJOR____CLANG_MINOR__ 0
 276 #endif
 277
 278 #if defined(__clang_patchlevel__)
 279 #define DEFINED___CLANG_PATCHLEVEL__                    1
 280 #else
 281 #define DEFINED___CLANG_PATCHLEVEL__                    0
 282 #endif
 283
 284 #define CLANG_ATLEAST(x, y, z)                                  \
 285         (DEFINED___CLANG____CLANG_MAJOR____CLANG_MINOR__ &&     \
 286          (__clang_major__ > (x) ||                              \
 287           (__clang_major__ == (x) &&                            \
 288            (__clang_minor__ > (y) ||                            \
 289             (__clang_minor__ == (y) &&                          \
 290              (!DEFINED___CLANG_PATCHLEVEL__ ||                  \
 291               __clang_patchlevel__ >= (z)                       \
 292              )                                                  \
 293             )                                                   \
 294            )                                                    \
 295           )                                                     \
 296          )                                                      \
 297         )
 298
 299 #if defined(__GNUC__) && !(defined(__clang__) || defined(__llvm__) || defined(__ICC) || defined(__OPEN64__) || defined(__PATHSCALE__) || defined(__PGI) || defined(__PGIC__))
 300 #define HAVE_REAL_GNUC
 301 #endif
 302
 303 #if GNUC_ATLEAST(2,0,0)
 304 #define return_address          __builtin_return_address(0)
 305 #endif
 306
 307 #if GNUC_ATLEAST(2,0,0)
 308 #define is_constant(expression) __builtin_constant_p(expression)
 309 #else
 310 #define is_constant(expression) (false)
 311 #endif
 312
 313 #if defined(__GNUC__) && defined(__GNUC_MINOR__) && __GNUC__ == 2 && __GNUC_MINOR__ <= 7
 314 /*
 315  * Verify that the __attribute__ directive is properly placed. GCC 2 has more
 316  * strict attribute placing rules than gcc 3 and following versions.
 317  *
 318  * egcs crashes on empty __attribute__ directive
 319  */
 320 #define attr_nothing            __attribute__(())
 321 #else
 322 #define attr_nothing
 323 #endif
 324
 325 #if GNUC_ATLEAST(2,0,0)
 326 #define attr_unaligned          __attribute__((packed))
 327 #endif
 328
 329 #if GNUC_ATLEAST(2,0,0) && !defined(__MINGW32__)
 330 #define attr_printf(x, y)       __attribute__((format(printf, x, y)))
 331 #else
 332 #define attr_printf(x, y)
 333 #endif
 334
 335 #if defined(HAVE_STDNORETURN_H) && !defined(__cplusplus) && !defined(__ICC)
 336 #include <stdnoreturn.h>
 337 #define attr_noreturn           noreturn void
 338 #elif GNUC_ATLEAST(2,5,0)
 339 #define attr_noreturn           void __attribute__((noreturn))
 340 #elif defined(_MSC_VER) && _MSC_VER >= 1600     /* not sure */
 341 #define attr_noreturn           void __declspec(noreturn)
 342 #else
 343 #define attr_noreturn           void
 344 #endif
 345
 346 #if GNUC_ATLEAST(2,7,0)
 347 #define attr_unused             __attribute__((__unused__))
 348 #else
 349 #define attr_unused             attr_nothing
 350 #endif
 351
 352 #if GNUC_ATLEAST(2,96,0)
 353 #define likely(x)               (__builtin_expect((int)(x), 1))
 354 #define unlikely(x)             (__builtin_expect((int)(x), 0))
 355 #else
 356 #define likely(x)               ((int)(x))
 357 #define unlikely(x)             ((int)(x))
 358 #endif
 359
 360 #if GNUC_ATLEAST(3,0,0) && !defined(__DJGPP__)  /* not sure */
 361 #define attr_aligned(x)         __attribute__((__aligned__(x)))
 362 #elif defined(_MSC_VER) && _MSC_VER >= 1600       /* not sure */
 363 #define attr_aligned(x)         __declspec(align(x))
 364 #else
 365 #define attr_aligned(x)         attr_nothing
 366 #endif
 367
 368 #if GNUC_ATLEAST(3,1,0)
 369 #define attr_noinline           __attribute__((__noinline__))
 370 #elif defined(_MSC_VER) && _MSC_VER >= 1600     /* not sure */
 371 #define attr_noinline           __declspec(noinline)
 372 #else
 373 #define attr_noinline
 374 #endif
 375
 376 #if GNUC_ATLEAST(3,1,0)
 377 #define attr_always_inline      inline __attribute__((__always_inline__))
 378 #elif defined(_MSC_VER) && _MSC_VER >= 1600     /* not sure */
 379 #define attr_always_inline      __forceinline
 380 #else
 381 #define attr_always_inline      inline
 382 #endif
 383
 384 #if defined(HAVE_REAL_GNUC) && !defined(UNUSUAL)
 385 #define INLINE_WORKS
 386 #endif
 387
 388 #if GNUC_ATLEAST(3,4,0)
 389 #define attr_w                  __attribute__((__warn_unused_result__))
 390 #else
 391 #define attr_w                  attr_nothing
 392 #endif
 393
 394 #if GNUC_ATLEAST(4,3,0)
 395 #define attr_cold               __attribute__((__noinline__,__cold__))
 396 #define attr_hot                __attribute__((/*__hot__*/))
 397 #elif GNUC_ATLEAST(3,1,0)
 398 #define attr_cold               __attribute__((__noinline__))
 399 #define attr_hot                attr_nothing
 400 #else
 401 #define attr_cold               attr_nothing
 402 #define attr_hot                attr_nothing
 403 #endif
 404
 405 #if GNUC_ATLEAST(4,5,0)
 406 #define attr_noclone            __attribute__((__noclone__))
 407 #else
 408 #define attr_noclone            attr_nothing
 409 #endif
 410
 411 #if GNUC_ATLEAST(3,0,0) && !defined(__PCC__) && defined(__i386__)
 412 #if GNUC_ATLEAST(4,1,0) && defined(HAVE_REAL_GNUC) && defined(__SSE__) && defined(__SSE_MATH__)
 413 #define attr_fastcall           __attribute__((__regparm__(3),__sseregparm__))
 414 #else
 415 #define attr_fastcall           __attribute__((__regparm__(3)))
 416 #endif
 417 #elif GNUC_ATLEAST(4,4,0) && defined(__x86_64__) && (defined(__CYGWIN__) || defined(__WIN32))
 418 /*#define attr_fastcall         __attribute__((__sysv_abi__))*/
 419 #define attr_fastcall           attr_nothing
 420 #elif defined(_MSC_VER)
 421 #define attr_fastcall           __fastcall
 422 #elif defined(__TURBOC__) || defined(__BORLANDC__)
 423 #define attr_fastcall           __fastcall
 424 #else
 425 #define attr_fastcall           attr_nothing
 426 #endif
 427
 428 #define attr_hot_fastcall       attr_hot attr_fastcall
 429
 430 #if defined(__GNUC__) && defined(__OPTIMIZE__) && !defined(__OPEN64__)
 431 attr_noreturn not_reached(void);
 432 #else
 433 #define not_reached()           internal(file_line, "this location should not be reached")
 434 #endif
 435
 436 /* Borland C has preprocessor expansion size limits */
 437 #if (defined(__TURBOC__) || defined(__BORLANDC__)) && !defined(__BIGGEST_ALIGNMENT__)
 438 #define __BIGGEST_ALIGNMENT__   8
 439 #endif
 440
 441 #define HEAP_ALIGN              (is_power_of_2(sizeof(void *)) ? sizeof(void *) * 2 : 16)
 442
 443 #if GNUC_ATLEAST(1,36,0)
 444 #define align_of(type)          __alignof__(type)
 445 #elif defined(HAVE_STDALIGN_H)
 446 #include <stdalign.h>
 447 #define align_of(type)          alignof(type)
 448 #else
 449 #define align_of(type)          minimum(HEAP_ALIGN,                     \
 450                                 !sizeof(type) ? 1 :                     \
 451                                 sizeof(type) & -sizeof(type))
 452 #endif
 453
 454 #if defined(__STDC__) && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901
 455 #define FLEXIBLE_ARRAY
 456 #elif defined(__GNUC__) && !defined(GNUC_PEDANTIC)
 457 #define FLEXIBLE_ARRAY          0
 458 #else
 459 #define FLEXIBLE_ARRAY          1
 460 #endif
 461
 462 #if defined(__GNUC__) && !defined(GNUC_PEDANTIC)
 463 #define FLEXIBLE_ARRAY_GCC      0
 464 #define EMPTY_TYPE              struct { }
 465 #else
 466 #define FLEXIBLE_ARRAY_GCC      1
 467 #define EMPTY_TYPE              char
 468 #endif
 469
 470 static attr_always_inline void *return_ptr(const void *ptr)
 471 {
 472         return (void *)ptr;
 473 }
 474
 475 #if defined(HAVE_REAL_GNUC)
 476 #define cast_ptr(type, ptr)     ((type)return_ptr(ptr))
 477 #else
 478 #define cast_ptr(type, ptr)     ((type)(void *)(ptr))
 479 #endif
 480
 481 #if 1
 482 #define cast_cpp                cast_ptr
 483 #else
 484 #define cast_cpp(type, ptr)     (ptr)
 485 #endif
 486
 487 #ifndef HAVE___BUILTIN_ASSUME_ALIGNED
 488 #define __builtin_assume_aligned(p, align)              (p)
 489 #endif
 490
 491
 492 /*
 493  * We allocate partial structures with union as the last member.
 494  * If this causes problems with any compiler, enable this.
 495  */
 496 #if 0
 497 #define partial_sizeof_lower_bound(full)                sizeof(full)
 498 #define partial_sizeof(full, part)                      sizeof(full)
 499 #define partial_sizeof_array(full, part, extra)         maximum_maybe0(sizeof(full), (offsetof(full, part) + (extra) * sizeof(((full *)NULL)->part[0])))
 500 #else
 501 #define partial_sizeof_lower_bound(full)                ((size_t)0)
 502 #define partial_sizeof(full, part)                      (offsetof(full, part) + sizeof(((full *)NULL)->part))
 503 #define partial_sizeof_array(full, part, extra)         (offsetof(full, part) + (extra) * sizeof(((full *)NULL)->part[0]))
 504 #endif
 505
 506 #if defined(_MSC_VER)
 507 #define barrier_aliasing()      do { } while (0)
 508 #elif defined(HAVE_GCC_ASSEMBLER)
 509 #define barrier_aliasing()      __asm__ volatile ("":::"memory")
 510 #else
 511 #define NEED_EXPLICIT_ALIASING_BARRIER
 512 extern volatile char * volatile alias_ptr;
 513 #define barrier_aliasing()      \
 514 do {                            \
 515         *alias_ptr = 0;         \
 516 } while (0)
 517 #endif
 518
 519 #if defined(HAVE_GCC_ASSEMBLER)
 520 #define ASM_PREVENT_CSE         __asm__ volatile ("":::"memory")
 521 #else
 522 #define ASM_PREVENT_CSE         do { } while (0)
 523 #endif
 524
 525 #if defined(HAVE_GCC_ASSEMBLER) && 0
 526 #define ASM_PREVENT_JOIN(i)     __asm__ (""::"i"(i))
 527 #else
 528 #define ASM_PREVENT_JOIN(i)     do { } while (0)
 529 #endif
 530
 531 #if defined(HAVE_GCC_ASSEMBLER)
 532 #define asm_copy(dest, src)     __asm__ volatile (".if 0 \n .endif" : "=r"(dest) : "0"(src))
 533 #endif
 534
 535 #if !defined(HAVE_INT64_T_UINT64_T)
 536 #define EFFICIENT_WORD_SIZE     32
 537 #elif defined(BIT64) || defined(__x86_64__) || defined(__aarch64__) || (defined(_PA_RISC2_0) && defined(__HP_cc)) || (defined(__VMS) && !defined(__VAX))
 538 #define EFFICIENT_WORD_SIZE     64
 539 #else
 540 #define EFFICIENT_WORD_SIZE     32
 541 #endif
 542
 543 #define int_efficient_t         cat4(int,EFFICIENT_WORD_SIZE,_,t)
 544 #define uint_efficient_t        cat4(uint,EFFICIENT_WORD_SIZE,_,t)
 545
 546 #if defined(__alpha__) && !defined(__alpha_bwx__)
 547 typedef int32_t char_efficient_t;
 548 typedef uint32_t uchar_efficient_t;
 549 typedef int32_t short_efficient_t;
 550 typedef uint32_t ushort_efficient_t;
 551 #else
 552 typedef int8_t char_efficient_t;
 553 typedef uint8_t uchar_efficient_t;
 554 typedef int16_t short_efficient_t;
 555 typedef uint16_t ushort_efficient_t;
 556 #endif
 557
 558
 559 #if defined(HAVE_COMPUTED_GOTO) && defined(__clang__) && 0
 560 /* Clang supports computed goto but it increases compilation time extremely. */
 561 #undef HAVE_COMPUTED_GOTO
 562 #endif
 563
 564 #if defined(HAVE_COMPUTED_GOTO) && defined(GNUC_PEDANTIC)
 565 #undef HAVE_COMPUTED_GOTO
 566 #endif
 567
 568
 569 #if !defined(UNUSUAL_NO_ASSEMBLER)
 570
 571 #if defined(HAVE_GCC_ASSEMBLER) && (defined(__i386__) || defined(__x86_64__))
 572
 573 #define ARCH_X86
 574 #ifdef HAVE_GCC_ASSEMBLER
 575 #define INLINE_ASM_GCC_X86
 576 #endif
 577
 578 #if defined(__i386__)
 579 #define ARCH_X86_32
 580 #define ARCH_NAME       "i386"
 581 #ifdef HAVE_GCC_ASSEMBLER
 582 #define INLINE_ASM_GCC_I386
 583 #endif
 584 #elif defined(__x86_64__) && !defined(__ILP32__)
 585 #define ARCH_X86_64
 586 #define ARCH_NAME       "x86_64"
 587 #ifdef HAVE_GCC_ASSEMBLER
 588 #define INLINE_ASM_GCC_X86_64
 589 #endif
 590 #else
 591 #define ARCH_X86_X32
 592 #define ARCH_NAME       "x86_x32"
 593 #ifdef HAVE_GCC_ASSEMBLER
 594 #define INLINE_ASM_GCC_X32
 595 #endif
 596 #endif
 597
 598 #ifdef HAVE_GCC_ASSEMBLER
 599
 600 #if defined(__clang__) || defined(__llvm__) || !GNUC_ATLEAST(4,0,0)     /* !!! TODO: check GCC version exactly */
 601 /*
 602  * LLVM has inefficient "rm" implementation - it always references memory
 603  * on the stack - https://bugs.llvm.org/show_bug.cgi?id=9723
 604  *
 605  * gcc 2.7 and 3.0 can't concatenate strings in asm constraint
 606  */
 607 #define X86_ASM_M
 608 #else
 609 #define X86_ASM_M               "m"
 610 #endif
 611
 612 #ifndef __SSE__
 613 #define X86_ASM_XMM0_CLOB
 614 #define X86_ASM_XMM0_CLOBC
 615 #define X86_ASM_XMM1_CLOBC
 616 #else
 617 #define X86_ASM_XMM0_CLOB       : "xmm0"
 618 #define X86_ASM_XMM0_CLOBC      , "xmm0"
 619 #define X86_ASM_XMM1_CLOBC      , "xmm1"
 620 #endif
 621
 622 #ifndef __AVX__
 623 #define X86_ASM_V
 624 #define X86_ASM_AVX_PARAM(x)    #x
 625 #else
 626 #define X86_ASM_V               "v"
 627 #define X86_ASM_AVX_PARAM(x)    #x ", " #x
 628 #endif
 629
 630 #endif
 631
 632 #elif defined(_M_IX86)
 633
 634 #define ARCH_X86
 635 #define ARCH_X86_32
 636 #define ARCH_NAME       "i386"
 637
 638 #elif defined(_M_X64)
 639
 640 #define ARCH_X86
 641 #define ARCH_X86_64
 642 #define ARCH_NAME       "x86_64"
 643
 644 #elif defined(__alpha__)
 645
 646 #define ARCH_ALPHA
 647 #define ARCH_NAME       "alpha"
 648
 649 #elif (defined(__arm__) && defined(__ARM_EABI__) && (!defined(__thumb__) || defined(__thumb2__))) || defined(__aarch64__)
 650
 651 #define ARCH_ARM
 652 #ifdef __aarch64__
 653 #define ARCH_ARM64
 654 #define ARCH_NAME       "aarchc64"
 655 #else
 656 #define ARCH_ARM32
 657 #define ARCH_NAME       "arm"
 658 #endif
 659
 660 #ifdef __ARM_ARCH
 661 #define ARM_VERSION     __ARM_ARCH
 662 #elif defined(__ARM_ARCH_8A__) || defined(__ARM_ARCH_8A)
 663 #define ARM_VERSION             8
 664 #elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
 665 #define ARM_VERSION             7
 666 #elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6M__)
 667 #define ARM_VERSION             6
 668 #elif defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)
 669 #define ARM_VERSION             5
 670 #elif defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) || defined(__ARM_ARCH_3M__)
 671 #define ARM_VERSION             4
 672 #elif defined(__ARM_ARCH_3__)
 673 #define ARM_VERSION             3
 674 #elif defined(__ARM_ARCH_2__)
 675 #define ARM_VERSION             2
 676 #else
 677 #define ARM_VERSION             1
 678 #define ARM_VERSION_UNKNOWN
 679 #endif
 680
 681 #if defined(HAVE_GCC_ASSEMBLER) && defined(HAVE_ARM_ASSEMBLER) && !defined(ARCH_ARM64)
 682 #define INLINE_ASM_GCC_ARM
 683 #if ARM_VERSION < 8
 684 #define ARM_ASM_PREFIX          ".cpu cortex-a15\n .fpu neon-vfpv4\n;;;;;;;;;;;;;;;;\n"
 685 #else
 686 #define ARM_ASM_PREFIX          ".fpu neon-vfpv4\n;;;;;;;;;;;;;;;;\n"
 687 #endif
 688 #define ARM_ASM_APSR            "apsr"
 689 #define ARM_ASM_LO              "Q"
 690 #define ARM_ASM_HI              "R"
 691 #if !defined(__thumb2__)
 692 #define ARM_ASM_S               ""
 693 #define ARM_ASM_S_CLOB
 694 #define ARM_ASM_IF_T12(x,y)     y
 695 #else
 696 #define INLINE_ASM_GCC_ARM_THUMB2
 697 #define ARM_ASM_STRD            "strd"
 698 #define ARM_ASM_S               "s"
 699 #define ARM_ASM_S_CLOB          : "cc"
 700 #define ARM_ASM_IF_T12(x,y)     x
 701 #endif
 702 #endif
 703
 704 #if defined(HAVE_GCC_ASSEMBLER) && defined(ARCH_ARM64)
 705 #define INLINE_ASM_GCC_ARM64
 706 #define ARM_ASM_PREFIX
 707 #define ARM_ASM_APSR            "nzcv"
 708 #define ARM_ASM_LO              "x"
 709 #define ARM_ASM_HI              "H"
 710 #define ARM_ASM_STRD            "stp"
 711 #define ARM_ASM_S               ""
 712 #define ARM_ASM_S_CLOB
 713 #define ARM_ASM_IF_T12(x,y)     y
 714 #endif
 715
 716 #if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_8A__) || defined(__ARM_ARCH_8A) || (defined(__ARM_ARCH_PROFILE) && __ARM_ARCH_PROFILE == 'A')
 717 #define ARM_ASM_DIV_NO_TRAP     1
 718 #else
 719 #define ARM_ASM_DIV_NO_TRAP     0
 720 #endif
 721
 722 #elif defined(__ia64) && defined(__linux__)
 723
 724 #define ARCH_IA64
 725 #define ARCH_NAME       "ia64"
 726
 727 #elif defined(__loongarch64)
 728
 729 #define ARCH_LOONGARCH64
 730 #define ARCH_NAME       "loongarch64"
 731
 732 #elif defined(__mips) && defined(_MIPS_SIM) && (_MIPS_SIM == 1 || _MIPS_SIM == 2 || _MIPS_SIM == 3)
 733
 734 #define ARCH_MIPS
 735 #if defined(__LP64__)
 736 #define ARCH_MIPS64
 737 #define ARCH_NAME       "mips64"
 738 #else
 739 #define ARCH_MIPS32
 740 #define ARCH_NAME       "mips"
 741 #if _MIPS_SIM == 1
 742 #define ARCH_MIPS_O32
 743 #else
 744 #define ARCH_MIPS_N32
 745 #endif
 746 #endif
 747
 748 #elif defined(__hppa)
 749
 750 #define ARCH_PARISC
 751 #if defined(__LP64__)
 752 #define ARCH_PARISC64
 753 #define ARCH_NAME       "parisc64"
 754 #define PA_SPACES               0
 755 #else
 756 #define ARCH_PARISC32
 757 #define ARCH_NAME       "parisc"
 758 #ifdef __hpux
 759 #define PA_SPACES               1
 760 #else
 761 #define PA_SPACES               0
 762 #endif
 763 #endif
 764
 765 #elif defined(__PPC__)
 766
 767 #define ARCH_POWER
 768 #if defined(__LP64__)
 769 #define ARCH_POWER64
 770 #define ARCH_NAME       "power64"
 771 #else
 772 #define ARCH_POWER32
 773 #define ARCH_NAME       "power"
 774 #endif
 775
 776 #elif defined(__s390__)
 777
 778 #define ARCH_S390
 779 #if defined(__LP64__)
 780 #define ARCH_S390_64
 781 #define ARCH_NAME       "s390x"
 782 #else
 783 #define ARCH_S390_32
 784 #define ARCH_NAME       "s390"
 785 #endif
 786
 787 #elif defined(__sparc__)
 788
 789 #define ARCH_SPARC
 790 #if defined(__LP64__)
 791 #define ARCH_SPARC64
 792 #define ARCH_NAME       "sparc64"
 793 #else
 794 #define ARCH_SPARC32
 795 #define ARCH_NAME       "sparc"
 796 #endif
 797
 798 #elif defined(__riscv) && defined(_LP64)
 799
 800 #define ARCH_RISCV64
 801 #define ARCH_NAME       "riscv64"
 802
 803 #endif
 804
 805
 806 #ifdef ARCH_X86
 807 #if defined(OS_CYGWIN) || defined(OS_WIN32)
 808 #define ARCH_X86_WIN_ABI
 809 #endif
 810 #endif
 811
 812
 813 #if defined(HAVE_ASM_GOTO) && !defined(UNUSUAL_NO_ASSEMBLER_GOTO)
 814 #define INLINE_ASM_GCC_LABELS
 815 #endif
 816
 817 #endif
 818
 819
 820 #if !defined(UNUSUAL_NO_TAGGED_POINTERS)
 821 #if defined(HAVE_MMAP) || defined(OS_DOS) || defined(OS_OS2) || defined(OS_WIN32)
 822 #if defined(ARCH_ALPHA)
 823 #define HAVE_CODEGEN
 824 #define HAVE_CODEGEN_TRAPS
 825 #endif
 826 #if defined(ARCH_ARM32) && defined(__ARMEL__)
 827 #define HAVE_CODEGEN
 828 #endif
 829 #if defined(ARCH_ARM64) && !defined(__ILP32__) && defined(HAVE___BUILTIN___CLEAR_CACHE)
 830 #define HAVE_CODEGEN
 831 #endif
 832 #if defined(ARCH_IA64)
 833 #define HAVE_CODEGEN
 834 #endif
 835 #if defined(ARCH_LOONGARCH64)
 836 #define HAVE_CODEGEN
 837 #endif
 838 #if defined(ARCH_MIPS)
 839 #define HAVE_CODEGEN
 840 #define HAVE_CODEGEN_TRAPS
 841 #endif
 842 #if defined(ARCH_PARISC)
 843 #define HAVE_CODEGEN
 844 #endif
 845 #if defined(ARCH_POWER)
 846 #define HAVE_CODEGEN
 847 #endif
 848 #if defined(ARCH_S390)
 849 #define HAVE_CODEGEN
 850 #endif
 851 #if defined(ARCH_SPARC)
 852 #define HAVE_CODEGEN
 853 #endif
 854 #if defined(ARCH_RISCV64)
 855 #define HAVE_CODEGEN
 856 #endif
 857 #if defined(ARCH_X86)
 858 #define HAVE_CODEGEN
 859 #endif
 860 #endif
 861 #endif
 862
 863 #if defined(HAVE_CODEGEN) && (defined(HAVE_MPROTECT) || defined(OS_DOS) || defined(OS_OS2) || defined(OS_WIN32))
 864 #if defined(ARCH_ARM) && defined(HAVE___BUILTIN___CLEAR_CACHE)
 865 #define CODEGEN_USE_HEAP
 866 #endif
 867 #if defined(ARCH_PARISC) && defined(HAVE_GCC_ASSEMBLER)
 868 #define CODEGEN_USE_HEAP
 869 #endif
 870 #if defined(ARCH_RISCV64) && defined(HAVE___BUILTIN___CLEAR_CACHE)
 871 #define CODEGEN_USE_HEAP
 872 #endif
 873 #if defined(ARCH_S390)
 874 #define CODEGEN_USE_HEAP
 875 #endif
 876 #if defined(ARCH_SPARC64) && defined(HAVE_GCC_ASSEMBLER)
 877 #define CODEGEN_USE_HEAP
 878 #endif
 879 #if defined(ARCH_X86)
 880 #define CODEGEN_USE_HEAP
 881 #endif
 882 #endif
 883
 884 #if defined(CODEGEN_USE_HEAP) && defined(DISABLE_RWX_MAPPINGS)
 885 #undef CODEGEN_USE_HEAP
 886 #endif
 887
 888
 889 #ifdef attr_unaligned
 890 #if defined(__i386__) || defined(__x86_64__) || defined(__ARM_FEATURE_UNALIGNED) || defined(__alpha__) || defined(__m68k__) || defined(__mips) || defined(__powerpc__) || defined(__s390__)
 891 /* define if unaligned access to code array is faster then assembling the value from 16-bit code_t entries */
 892 #define UNALIGNED_ACCESS
 893 #endif
 894 #endif
 895 #if defined(__i386__) || defined(__x86_64__) || defined(__ARM_FEATURE_UNALIGNED) || defined(__m68k__) || defined(__powerpc__) || defined(__s390__)
 896 /* define if unaligned access results in the same instructions as aligned access */
 897 #define UNALIGNED_ACCESS_EFFICIENT
 898 #endif
 899
 900
 901 #ifdef THREAD_NONE
 902 #define SMP_ALIAS_ALIGNMENT     1
 903 #else
 904 #define SMP_ALIAS_ALIGNMENT     128
 905 #ifdef __SANITIZE_THREAD__
 906 #define THREAD_SANITIZER
 907 #endif
 908 #endif
 909
 910
 911 #ifdef UNUSUAL_ARITHMETICS
 912 #define DIVIDE_ROUNDS_TO_ZERO   0
 913 #define RIGHT_SHIFT_KEEPS_SIGN  0
 914 #else
 915 #define DIVIDE_ROUNDS_TO_ZERO   ((intmax_t)9 / -4 == -2 &&      \
 916                                  (intmax_t)-9 / 4 == -2 &&      \
 917                                  (intmax_t)-9 / -4 == 2 &&      \
 918                                  (intmax_t)9 % -4 == 1 &&       \
 919                                  (intmax_t)-9 % 4 == -1 &&      \
 920                                  (intmax_t)-9 % -4 == -1)
 921 #define RIGHT_SHIFT_KEEPS_SIGN  ((~(intmax_t)0x1234U >> 1) == ~(intmax_t)0x91aU)
 922 #endif
 923
 924
 925 /* Define if volatile access to pointer, uintptr_t and uint32_t is atomic */
 926 #if (SIZEOF_UNSIGNED >= 4 || defined(THREAD_NONE)) && !defined(THREAD_SANITIZER)
 927 #define POINTERS_ARE_ATOMIC
 928 #endif
 929
 930
 931 #define BAD_POINTER_1           ((void *)(uintptr_t)1)
 932 #define BAD_POINTER_2           ((void *)(uintptr_t)2)
 933 #define BAD_POINTER_3           ((void *)(uintptr_t)3)
 934 #define SPECIAL_POINTER_1       BAD_POINTER_1
 935 #define SPECIAL_POINTER_2       BAD_POINTER_2
 936 #define SPECIAL_POINTER_3       BAD_POINTER_3
 937 #if !defined(UNUSUAL_NO_TAGGED_POINTERS) && !defined(UNUSUAL_NO_ARCH_TAGGED_POINTERS)
 938 #if defined(HAVE_POINTER_TAGS) && defined(__aarch64__) && !defined(__ILP32__)
 939 #define POINTER_IGNORE_START    56
 940 #define POINTER_IGNORE_BITS     8
 941 #elif defined(HAVE_POINTER_TAGS) && defined(__s390__) && !defined(__LP64__)
 942 #define POINTER_IGNORE_START    31
 943 #define POINTER_IGNORE_BITS     1
 944 #else
 945 #define POINTER_TAG_BIT         0
 946 #define POINTER_TAG             ((uintptr_t)1 << POINTER_TAG_BIT)
 947 #endif
 948 #endif
 949
 950 #ifdef POINTER_TAG
 951 static inline void *POINTER_TAG_ADD(void *ptr)
 952 {
 953         return (void *)((uintptr_t)ptr + POINTER_TAG);
 954 }
 955 static inline void *POINTER_TAG_CLEAR(void *ptr)
 956 {
 957         return (void *)((uintptr_t)ptr & ~(uintptr_t)POINTER_TAG);
 958 }
 959 static inline void *POINTER_TAG_SUB(void *ptr)
 960 {
 961         return (void *)((uintptr_t)ptr - POINTER_TAG);
 962 }
 963 static inline uintptr_t POINTER_TAG_GET(const void *ptr)
 964 {
 965         return (uintptr_t)ptr & POINTER_TAG;
 966 }
 967 #endif
 968 #ifdef POINTER_IGNORE_START
 969 #define POINTER_IGNORE_TOP_BIT          (POINTER_IGNORE_START + POINTER_IGNORE_BITS - 1)
 970 #define POINTER_IGNORE_MASK             ((((uintptr_t)1 << POINTER_IGNORE_BITS) - 1) << POINTER_IGNORE_START)
 971 #define POINTER_IGNORE_TOP              ((uintptr_t)1 << POINTER_IGNORE_TOP_BIT)
 972 #endif
 973
 974
 975 #ifdef __ICC
 976 #define CLZ_BSR_OP      -
 977 #else
 978 #define CLZ_BSR_OP      ^
 979 #endif
 980
 981 #if defined(HAVE_REAL_GNUC) && defined(__mips_isa_rev) && __mips_isa_rev >= 6
 982 #define broken_128bit_multiply          volatile
 983 #else
 984 #define broken_128bit_multiply
 985 #endif