mdw@git.distorted.org.uk Git - mLib/blob - utils/bits.h

   1 /* -*-c-*-
   2  *
   3  * Portable bit-level manipulation macros
   4  *
   5  * (c) 1998 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the mLib utilities library.
  11  *
  12  * mLib is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * mLib is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with mLib; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 #ifndef MLIB_BITS_H
  29 #define MLIB_BITS_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #include <limits.h>
  38 #include <stddef.h>
  39 #if __STDC_VERSION__ >= 199900l
  40 #  include <stdint.h>
  41 #endif
  42
  43 #ifndef MLIB_COMPILER_H
  44 #  include "compiler.h"
  45 #endif
  46
  47 /*----- Decide on some types ----------------------------------------------*/
  48
  49 /* --- Make GNU C shut up --- */
  50
  51 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
  52 #  define MLIB_BITS_EXTENSION __extension__
  53 #else
  54 #  define MLIB_BITS_EXTENSION
  55 #endif
  56
  57 /* --- Decide on a 32-bit type --- *
  58  *
  59  * I want a type which is capable of expressing 32-bit numbers.  Because some
  60  * implementations have 64-bit @long@s (infinitely preferable to the abortion
  61  * that is @long long@), using @unsigned long@ regardless is wasteful.  So,
  62  * if @int@ appears to be good enough, then I'll go with that.
  63  */
  64
  65 #if UINT_MAX >= 0xffffffffu
  66   typedef unsigned int uint32;
  67 #else
  68   typedef unsigned long uint32;
  69 #endif
  70
  71 /* --- Decide on a 64-bit type --- *
  72  *
  73  * The test is quite subtle.  Think about it.  Note that (at least on my
  74  * machine), the 32-bit macros are *much* faster than GCC's @long long@
  75  * support.
  76  */
  77
  78 #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX)
  79 #  define ULLONG_MAX ULONG_LONG_MAX
  80 #endif
  81
  82 #if UINT_MAX >> 31 > 0xffffffff
  83 #  define HAVE_UINT64
  84    typedef unsigned int uint64;
  85 #elif ULONG_MAX >> 31 > 0xffffffff
  86 #  define HAVE_UINT64
  87    typedef unsigned long uint64;
  88 #elif defined(ULLONG_MAX)
  89 #  define HAVE_UINT64
  90    MLIB_BITS_EXTENSION typedef unsigned long long uint64;
  91 #endif
  92
  93 #ifdef DEBUG64
  94 #  undef HAVE_UINT64
  95 #endif
  96
  97 #ifdef HAVE_UINT64
  98   typedef struct { uint64 i; } kludge64;
  99 #else
 100   typedef struct { uint32 hi, lo; } kludge64;
 101 #endif
 102
 103 /* --- Decide on a 24-bit type --- */
 104
 105 #if UINT_MAX >= 0x00ffffffu
 106   typedef unsigned int uint24;
 107 #else
 108   typedef unsigned long uint24;
 109 #endif
 110
 111 /* --- Decide on 16-bit and 8-bit types --- *
 112  *
 113  * This is more for brevity than anything else.
 114  */
 115
 116 typedef unsigned short uint16;
 117 typedef unsigned char octet, uint8;
 118
 119 /* --- WARNING! --- *
 120  *
 121  * Never lose sight of the fact that the above types may be wider than the
 122  * names suggest.  Some architectures have 32-bit @short@s for example.
 123  */
 124
 125 /*----- Macros ------------------------------------------------------------*/
 126
 127 /* --- Useful masks --- */
 128
 129 #define MASK8 0xffu
 130 #define MASK16 0xffffu
 131 #define MASK16_L MASK16
 132 #define MASK16_B MASK16
 133 #define MASK24 0xffffffu
 134 #define MASK24_L MASK24
 135 #define MASK24_B MASK24
 136 #define MASK32 0xffffffffu
 137 #define MASK32_L MASK32
 138 #define MASK32_B MASK32
 139
 140 #ifdef HAVE_UINT64
 141 #  define MASK64 MLIB_BITS_EXTENSION 0xffffffffffffffffu
 142 #  define MASK64_L MASK64
 143 #  define MASK64_B MASK64
 144 #endif
 145
 146 /* --- Sizes --- */
 147
 148 #define SZ_8 1
 149 #define SZ_16 2
 150 #define SZ_16_L 2
 151 #define SZ_16_B 2
 152 #define SZ_24 3
 153 #define SZ_24_L 3
 154 #define SZ_24_B 3
 155 #define SZ_32 4
 156 #define SZ_32_L 4
 157 #define SZ_32_B 4
 158
 159 #ifdef HAVE_UINT64
 160 #  define SZ_64 8
 161 #  define SZ_64_L 8
 162 #  define SZ_64_B 8
 163 #endif
 164
 165 /* --- Type aliases --- */
 166
 167 #define TY_U8 octet
 168 #define TY_U16 uint16
 169 #define TY_U16_L uint16
 170 #define TY_U16_B uint16
 171 #define TY_U24 uint24
 172 #define TY_U24_L uint24
 173 #define TY_U24_B uint24
 174 #define TY_U32 uint32
 175 #define TY_U32_L uint32
 176 #define TY_U32_B uint32
 177
 178 #ifdef HAVE_UINT64
 179 #  define TY_U64 uint64
 180 #  define TY_U64_L uint64
 181 #  define TY_U64_B uint64
 182 #endif
 183
 184 /* --- List macros --- */
 185
 186 #ifdef HAVE_UINT64
 187 #  define  DOUINTCONV(_)                                                \
 188      _(8, 8, 8)                                                         \
 189      _(16, 16, 16) _(16, 16_L, 16l) _(16, 16_B, 16b)                    \
 190      _(24, 24, 24) _(24, 24_L, 24l) _(24, 24_B, 24b)                    \
 191      _(32, 32, 32) _(32, 32_L, 32l) _(32, 32_B, 32b)                    \
 192      _(64, 64, 64) _(64, 64_L, 64l) _(64, 64_B, 64b)
 193 #  define DOUINTSZ(_) _(8) _(16) _(24) _(32) _(64)
 194 #else
 195 #  define  DOUINTCONV(_)                                                \
 196      _(8, 8, 8)                                                         \
 197      _(16, 16, 16) _(16, 16_L, 16l) _(16, 16_B, 16b)                    \
 198      _(24, 24, 24) _(24, 24_L, 24l) _(24, 24_B, 24b)                    \
 199      _(32, 32, 32) _(32, 32_L, 32l) _(32, 32_B, 32b)
 200 #  define DOUINTSZ(_) _(8) _(16) _(24) _(32)
 201 #endif
 202
 203 /* --- Type coercions --- */
 204
 205 #define U8(x) ((octet)((x) & MASK8))
 206 #define U16(x) ((uint16)((x) & MASK16))
 207 #define U24(x) ((uint24)((x) & MASK24))
 208 #define U32(x) ((uint32)((x) & MASK32))
 209
 210 #ifdef HAVE_UINT64
 211 #  define U64(x) ((uint64)(x) & MASK64)
 212 #  define U64_(d, x) ((d).i = U64(x).i)
 213 #else
 214 #  define U64_(d, x) ((d).hi = U32((x).hi), (d).lo = U32((x).lo))
 215 #endif
 216
 217 /* --- Safe shifting macros --- */
 218
 219 #define LSL8(v, s) U8(U8(v) << ((s) & 7u))
 220 #define LSR8(v, s) U8(U8(v) >> ((s) & 7u))
 221 #define LSL16(v, s) U16(U16(v) << ((s) & 15u))
 222 #define LSR16(v, s) U16(U16(v) >> ((s) & 15u))
 223 #define LSL24(v, s) U24(U24(v) << ((s) % 24u))
 224 #define LSR24(v, s) U24(U24(v) >> ((s) % 24u))
 225 #define LSL32(v, s) U32(U32(v) << ((s) & 31u))
 226 #define LSR32(v, s) U32(U32(v) >> ((s) & 31u))
 227
 228 #ifdef HAVE_UINT64
 229 #  define LSL64(v, s) U64(U64(v) << ((s) & 63u))
 230 #  define LSR64(v, s) U64(U64(v) >> ((s) & 63u))
 231 #  define LSL64_(d, v, s) ((d).i = LSL64((v).i, (s)))
 232 #  define LSR64_(d, v, s) ((d).i = LSR64((v).i, (s)))
 233 #else
 234 #  define LSL64_(d, v, s) do {                                          \
 235      unsigned _s = (s) & 63u;                                           \
 236      uint32 _l = (v).lo, _h = (v).hi;                                   \
 237      kludge64 *_d = &(d);                                               \
 238      if (_s >= 32) {                                                    \
 239        _d->hi = LSL32(_l, _s - 32u);                                    \
 240        _d->lo = 0;                                                      \
 241      } else if (!_s) {                                                  \
 242        _d->lo = _l;                                                     \
 243        _d->hi = _h;                                                     \
 244      } else {                                                           \
 245        _d->hi = LSL32(_h, _s) | LSR32(_l, 32u - _s);                    \
 246        _d->lo = LSL32(_l, _s);                                          \
 247      }                                                                  \
 248    } while (0)
 249 #  define LSR64_(d, v, s) do {                                          \
 250      unsigned _s = (s) & 63u;                                           \
 251      uint32 _l = (v).lo, _h = (v).hi;                                   \
 252      kludge64 *_d = &(d);                                               \
 253      if (_s >= 32) {                                                    \
 254        _d->lo = LSR32(_h, _s - 32u);                                    \
 255        _d->hi = 0;                                                      \
 256      } else if (!_s) {                                                  \
 257        _d->lo = _l;                                                     \
 258        _d->hi = _h;                                                     \
 259      } else {                                                           \
 260        _d->lo = LSR32(_l, _s) | LSL32(_h, 32u - _s);                    \
 261        _d->hi = LSR32(_h, _s);                                          \
 262      }                                                                  \
 263    } while (0)
 264 #endif
 265
 266 /* --- Rotation macros --- */
 267
 268 #define ROL8(v, s) (LSL8((v), (s)) | (LSR8((v), 8u - (s))))
 269 #define ROR8(v, s) (LSR8((v), (s)) | (LSL8((v), 8u - (s))))
 270 #define ROL16(v, s) (LSL16((v), (s)) | (LSR16((v), 16u - (s))))
 271 #define ROR16(v, s) (LSR16((v), (s)) | (LSL16((v), 16u - (s))))
 272 #define ROL24(v, s) (LSL24((v), (s)) | (LSR24((v), 24u - (s))))
 273 #define ROR24(v, s) (LSR24((v), (s)) | (LSL24((v), 24u - (s))))
 274 #define ROL32(v, s) (LSL32((v), (s)) | (LSR32((v), 32u - (s))))
 275 #define ROR32(v, s) (LSR32((v), (s)) | (LSL32((v), 32u - (s))))
 276
 277 #ifdef HAVE_UINT64
 278 #  define ROL64(v, s) (LSL64((v), (s)) | (LSR64((v), 64u - (s))))
 279 #  define ROR64(v, s) (LSR64((v), (s)) | (LSL64((v), 64u - (s))))
 280 #  define ROL64_(d, v, s) ((d).i = ROL64((v).i, (s)))
 281 #  define ROR64_(d, v, s) ((d).i = ROR64((v).i, (s)))
 282 #else
 283 #  define ROL64_(d, v, s) do {                                          \
 284      unsigned _s = (s) & 63u;                                           \
 285      uint32 _l = (v).lo, _h = (v).hi;                                   \
 286      kludge64 *_d = &(d);                                               \
 287      if (_s > 32) {                                                     \
 288        _d->hi = LSL32(_l, _s - 32u) | LSR32(_h, 64u - _s);              \
 289        _d->lo = LSL32(_h, _s - 32u) | LSR32(_l, 64u - _s);              \
 290      } else if (!_s) {                                                  \
 291        _d->lo = _l;                                                     \
 292        _d->hi = _h;                                                     \
 293      } else if (_s == 32) {                                             \
 294        _d->lo = _h;                                                     \
 295        _d->hi = _l;                                                     \
 296      } else {                                                           \
 297        _d->hi = LSL32(_h, _s) | LSR32(_l, 32u - _s);                    \
 298        _d->lo = LSL32(_l, _s) | LSR32(_h, 32u - _s);                    \
 299      }                                                                  \
 300    } while (0)
 301 #  define ROR64_(d, v, s) do {                                          \
 302      unsigned _s = (s) & 63u;                                           \
 303      uint32 _l = (v).lo, _h = (v).hi;                                   \
 304      kludge64 *_d = &(d);                                               \
 305      if (_s > 32) {                                                     \
 306        _d->hi = LSR32(_l, _s - 32u) | LSL32(_h, 64u - _s);              \
 307        _d->lo = LSR32(_h, _s - 32u) | LSL32(_l, 64u - _s);              \
 308      } else if (!_s) {                                                  \
 309        _d->lo = _l;                                                     \
 310        _d->hi = _h;                                                     \
 311      } else if (_s == 32) {                                             \
 312        _d->lo = _h;                                                     \
 313        _d->hi = _l;                                                     \
 314      } else {                                                           \
 315        _d->hi = LSR32(_h, _s) | LSL32(_l, 32u - _s);                    \
 316        _d->lo = LSR32(_l, _s) | LSL32(_h, 32u - _s);                    \
 317      }                                                                  \
 318    } while (0)
 319 #endif
 320
 321 /* --- Endianness swapping --- */
 322
 323 #if GCC_VERSION_P(4, 8)
 324 #  define ENDSWAP16(x) ((uint16)__builtin_bswap16(x))
 325 #endif
 326 #if GCC_VERSION_P(4, 3)
 327 #  define ENDSWAP32(x) ((uint32)__builtin_bswap32(x))
 328 #endif
 329 #if GCC_VERSION_P(4, 3) && defined(HAVE_UINT64)
 330 #  define ENDSWAP64(x) ((uint64)__builtin_bswap64(x))
 331 #endif
 332
 333 #ifndef ENDSWAP8
 334 #  define ENDSWAP8(x) U8(x)
 335 #endif
 336 #ifndef ENDSWAP16
 337 #  define ENDSWAP16(x)                                                  \
 338         ((((uint16)(x) >> 8)&0xff) |                                    \
 339          (((uint16)(x)&0xff) << 8))
 340 #endif
 341 #ifndef ENDSWAP24
 342 #  define ENDSWAP24(x)                                                  \
 343         ((((uint24)(x) >> 16)&0xff) |                                   \
 344          ((uint24)(x)&0xff00) |                                         \
 345          ((uint24)((x)&0xff) << 16))
 346 #endif
 347 #ifndef ENDSWAP32
 348 #  define ENDSWAP32(x)                                                  \
 349         (ENDSWAP16(((uint32)(x) >> 16)&0xffff) |                        \
 350          ((uint32)ENDSWAP16((x)&0xffff) << 16))
 351 #endif
 352 #if defined(HAVE_UINT64) && !defined(ENDSWAP64)
 353 #  define ENDSWAP64(x)                                                  \
 354         (ENDSWAP32(((uint64)(x) >> 32)&0xffffffff) |                    \
 355          ((uint64)ENDSWAP32((x)&0xffffffff) << 32))
 356 #endif
 357 #ifdef HAVE_UINT64
 358 #  define ENDSWAP64_(z, x)                                              \
 359         ((z).i = ENDSWAP64((x).i))
 360 #else
 361 #  define ENDSWAP64_(z, x)                                              \
 362         ((z).lo = ENDSWAP32((x).hi),                                    \
 363          (z).hi = ENDSWAP32((x).lo))
 364 #endif
 365
 366 #define MLIB_LITTLE_ENDIAN 1234
 367 #define MLIB_BIG_ENDIAN 4321
 368 #if defined(__ORDER_LITTLE_ENDIAN__) &&                                 \
 369     __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 370 #  define MLIB_BYTE_ORDER MLIB_LITTLE_ENDIAN
 371 #elif defined(__ORDER_BIG_ENDIAN__) &&                                  \
 372       __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 373 #  define MLIB_BYTE_ORDER MLIB_BIG_ENDIAN
 374 #endif
 375
 376 #if MLIB_BYTE_ORDER == MLIB_LITTLE_ENDIAN
 377 #  define HTOL16(x) (x)
 378 #  define LTOH16(x) (x)
 379 #  define HTOB16(x) ENDSWAP16(x)
 380 #  define BTOH16(x) ENDSWAP16(x)
 381 #  define HTOL24(x) (x)
 382 #  define LTOH24(x) (x)
 383 #  define HTOB24(x) ENDSWAP24(x)
 384 #  define BTOH24(x) ENDSWAP24(x)
 385 #  define HTOL32(x) (x)
 386 #  define LTOH32(x) (x)
 387 #  define HTOB32(x) ENDSWAP32(x)
 388 #  define BTOH32(x) ENDSWAP32(x)
 389 #  ifdef HAVE_UINT64
 390 #    define HTOL64(x) (x)
 391 #    define LTOH64(x) (x)
 392 #    define HTOB64(x) ENDSWAP64(x)
 393 #    define BTOH64(x) ENDSWAP64(x)
 394 #  endif
 395 #  define HTOL64_(z, x) ASSIGN64(z, x)
 396 #  define LTOH64_(z, x) ASSIGN64(z, x)
 397 #  define HTOB64_(z, x) ENDSWAP64_(z, x)
 398 #  define BTOH64_(z, x) ENDSWAP64_(z, x)
 399 #elif MLIB_BYTE_ORDER == MLIB_BIG_ENDIAN
 400 #  define HTOL16(x) ENDSWAP16(x)
 401 #  define LTOH16(x) ENDSWAP16(x)
 402 #  define HTOB16(x) (x)
 403 #  define BTOH16(x) (x)
 404 #  define HTOL24(x) ENDSWAP24(x)
 405 #  define LTOH24(x) ENDSWAP24(x)
 406 #  define HTOB24(x) (x)
 407 #  define BTOH24(x) (x)
 408 #  define HTOL32(x) ENDSWAP32(x)
 409 #  define LTOH32(x) ENDSWAP32(x)
 410 #  define HTOB32(x) (x)
 411 #  define BTOH32(x) (x)
 412 #  ifdef HAVE_UINT64
 413 #    define HTOL64(x) ENDSWAP64(x)
 414 #    define LTOH64(x) ENDSWAP64(x)
 415 #    define HTOB64(x) (x)
 416 #    define BTOH64(x) (x)
 417 #    define HTOL64_(z, x) ENDSWAP64_(z, x)
 418 #    define LTOH64_(z, x) ENDSWAP64_(z, x)
 419 #    define HTOB64_(z, x) ((z).i = (x).i)
 420 #    define BTOH64_(z, x) ((z).i = (x).i)
 421 #  endif
 422 #  define HTOL64_(z, x) ENDSWAP64_(z, x)
 423 #  define LTOH64_(z, x) ENDSWAP64_(z, x)
 424 #  define HTOB64_(z, x) ASSIGN64(z, x)
 425 #  define BTOH64_(z, x) ASSIGN64(z, x)
 426 #endif
 427
 428 /* --- Unaligned access (GCC-specific) --- */
 429
 430 #if GCC_VERSION_P(3, 3) && CHAR_BIT == 8
 431 #  define MLIB_MISALIGNED __attribute__((aligned(1), may_alias))
 432 #  if __SIZEOF_SHORT__ == 2
 433      typedef MLIB_MISALIGNED unsigned short misaligned_uint16;
 434 #    define RAW16(p) (*(misaligned_uint16 *)(p))
 435 #  endif
 436 #  if __SIZEOF_INT__ == 4
 437      typedef MLIB_MISALIGNED unsigned int misaligned_uint32;
 438 #    define RAW32(p) (*(misaligned_uint32 *)(p))
 439 #  elif __SIZEOF_LONG__ == 4
 440      typedef MLIB_MISALIGNED unsigned long misaligned_uint32;
 441 #    define RAW32(p) (*(misaligned_uint32 *)(p))
 442 #  endif
 443 #  if __SIZEOF_LONG__ == 8
 444      typedef MLIB_MISALIGNED unsigned long misaligned_uint64;
 445 #    define RAW64(p) (*(misaligned_uint64 *)(p))
 446 #  elif __SIZEOF_LONG_LONG__ == 8
 447      typedef MLIB_MISALIGNED unsigned long long misaligned_uint64;
 448 #    define RAW64(p) (*(misaligned_uint64 *)(p))
 449 #  endif
 450 #endif
 451
 452 /* --- Storage and retrieval --- */
 453
 454 #if defined(RAW16) && defined(LTOH16)
 455 #  define LOAD16_L(p) LTOH16(RAW16(p))
 456 #endif
 457 #if defined(RAW16) && defined(HTOL16)
 458 #  define STORE16_L(p, x) (RAW16(p) = HTOL16(x))
 459 #endif
 460 #if defined(RAW16) && defined(BTOH16)
 461 #  define LOAD16_B(p) BTOH16(RAW16(p))
 462 #endif
 463 #if defined(RAW16) && defined(HTOB16)
 464 #  define STORE16_B(p, x) (RAW16(p) = HTOB16(x))
 465 #endif
 466
 467 #if defined(RAW32) && defined(LTOH32)
 468 #  define LOAD32_L(p) LTOH32(RAW32(p))
 469 #endif
 470 #if defined(RAW32) && defined(HTOL32)
 471 #  define STORE32_L(p, x) (RAW32(p) = HTOL32(x))
 472 #endif
 473 #if defined(RAW32) && defined(BTOH32)
 474 #  define LOAD32_B(p) BTOH32(RAW32(p))
 475 #endif
 476 #if defined(RAW32) && defined(HTOB32)
 477 #  define STORE32_B(p, x) (RAW32(p) = HTOB32(x))
 478 #endif
 479
 480 #if defined(RAW64) && defined(LTOH64)
 481 #  define LOAD64_L(p) LTOH64(RAW64(p))
 482 #endif
 483 #if defined(RAW64) && defined(HTOL64)
 484 #  define STORE64_L(p, x) (RAW64(p) = HTOL64(x))
 485 #endif
 486 #if defined(RAW64) && defined(BTOH64)
 487 #  define LOAD64_B(p) BTOH64(RAW64(p))
 488 #endif
 489 #if defined(RAW64) && defined(HTOB64)
 490 #  define STORE64_B(p, x) (RAW64(p) = HTOB64(x))
 491 #endif
 492
 493 #define GETBYTE(p, o) (((octet *)(p))[o] & MASK8)
 494 #define PUTBYTE(p, o, v) (((octet *)(p))[o] = U8((v)))
 495
 496 #define LOAD8(p) (GETBYTE((p), 0))
 497 #define STORE8(p, v) (PUTBYTE((p), 0, (v)))
 498
 499 #ifndef LOAD16_B
 500 #  define LOAD16_B(p)
 501         (((uint16)GETBYTE((p), 0) << 8) |                               \
 502          ((uint16)GETBYTE((p), 1) << 0))
 503 #endif
 504 #ifndef LOAD16_L
 505 #  define LOAD16_L(p)                                                   \
 506         (((uint16)GETBYTE((p), 0) << 0) |                               \
 507          ((uint16)GETBYTE((p), 1) << 8))
 508 #endif
 509 #define LOAD16(p) LOAD16_B((p))
 510
 511 #ifndef STORE16_B
 512 #  define STORE16_B(p, v)                                               \
 513         (PUTBYTE((p), 0, (uint16)(v) >> 8),                             \
 514          PUTBYTE((p), 1, (uint16)(v) >> 0))
 515 #endif
 516 #ifndef STORE16_L
 517 #  define STORE16_L(p, v)                                               \
 518         (PUTBYTE((p), 0, (uint16)(v) >> 0),                             \
 519          PUTBYTE((p), 1, (uint16)(v) >> 8))
 520 #endif
 521 #define STORE16(p, v) STORE16_B((p), (v))
 522
 523 #ifndef LOAD24_B
 524 #  define LOAD24_B(p)                                                   \
 525         (((uint24)GETBYTE((p), 0)            << 16) |                   \
 526          ((uint24)LOAD16_B((octet *)(p) + 1) <<  0))
 527 #endif
 528 #ifndef LOAD24_L
 529 #  define LOAD24_L(p)                                                   \
 530         (((uint24)LOAD16_L((octet *)(p) + 0) <<  0) |                   \
 531          ((uint24)GETBYTE((p), 2)            << 16))
 532 #endif
 533 #define LOAD24(p) LOAD24_B((p))
 534
 535 #ifndef STORE24_B
 536 #  define STORE24_B(p, v)                                               \
 537         (PUTBYTE((p), 0,             (uint24)(v) >> 16),                \
 538          STORE16_B((octet *)(p) + 1, (uint24)(v) >>  0))
 539 #endif
 540 #ifndef STORE24_L
 541 #  define STORE24_L(p, v)                                               \
 542         (STORE16_L((octet *)(p) + 0, (uint24)(v) >>  0),                \
 543          PUTBYTE((p), 2,             (uint24)(v) >> 16))
 544 #endif
 545 #define STORE24(p, v) STORE24_B((p), (v))
 546
 547 #ifndef LOAD32_B
 548 #  define LOAD32_B(p)                                                   \
 549         (((uint32)LOAD16_B((octet *)(p) + 0) << 16) |                   \
 550          ((uint32)LOAD16_B((octet *)(p) + 2) <<  0))
 551 #endif
 552 #ifndef LOAD32_L
 553 #  define LOAD32_L(p)                                                   \
 554         (((uint32)LOAD16_L((octet *)(p) + 0) <<  0) |                   \
 555          ((uint32)LOAD16_L((octet *)(p) + 2) << 16))
 556 #endif
 557 #define LOAD32(p) LOAD32_B((p))
 558
 559 #ifndef STORE32_B
 560 #  define STORE32_B(p, v)                                               \
 561         (STORE16_B((octet *)(p) + 0, (uint32)(v) >> 16),                \
 562          STORE16_B((octet *)(p) + 2, (uint32)(v) >>  0))
 563 #endif
 564 #ifndef STORE32_L
 565 #  define STORE32_L(p, v)                                               \
 566         (STORE16_L((octet *)(p) + 0, (uint32)(v) >>  0),                \
 567          STORE16_L((octet *)(p) + 2, (uint32)(v) >> 16))
 568 #endif
 569 #define STORE32(p, v) STORE32_B((p), (v))
 570
 571 #ifdef HAVE_UINT64
 572
 573 #  ifndef LOAD64_B
 574 #    define LOAD64_B(p)                                                 \
 575         (((uint64)LOAD32_B((octet *)(p) + 0) << 32) |                   \
 576          ((uint64)LOAD32_B((octet *)(p) + 4) <<  0))
 577 #  endif
 578 #  ifndef LOAD64_L
 579 #    define LOAD64_L(p)                                                 \
 580         (((uint64)LOAD32_L((octet *)(p) + 0) <<  0) |                   \
 581          ((uint64)LOAD32_L((octet *)(p) + 4) << 32))
 582 #  endif
 583 #  define LOAD64(p) LOAD64_B((p))
 584 #  define LOAD64_B_(d, p) ((d).i = LOAD64_B((p)))
 585 #  define LOAD64_L_(d, p) ((d).i = LOAD64_L((p)))
 586 #  define LOAD64_(d, p) LOAD64_B_((d), (p))
 587
 588 #  ifndef STORE64_B
 589 #    define STORE64_B(p, v)                                             \
 590         (STORE32_B((octet *)(p) + 0, (uint64)(v) >> 32),                \
 591          STORE32_B((octet *)(p) + 4, (uint64)(v) >>  0))
 592 #  endif
 593 #  ifndef STORE64_L
 594 #    define STORE64_L(p, v)                                             \
 595         (STORE32_L((octet *)(p) + 0, (uint64)(v) >>  0),                \
 596          STORE32_L((octet *)(p) + 4, (uint64)(v) >> 32))
 597 #  endif
 598 #  define STORE64(p, v) STORE64_B((p), (v))
 599 #  define STORE64_B_(p, v) STORE64_B((p), (v).i)
 600 #  define STORE64_L_(p, v) STORE64_L((p), (v).i)
 601 #  define STORE64_(p, v) STORE64_B_((p), (v))
 602
 603 #else
 604
 605 #  define LOAD64_B_(d, p)                                               \
 606         ((d).hi = LOAD32_B((octet *)(p) + 0),                           \
 607          (d).lo = LOAD32_B((octet *)(p) + 4))
 608 #  define LOAD64_L_(d, p)                                               \
 609         ((d).lo = LOAD32_L((octet *)(p) + 0),                           \
 610          (d).hi = LOAD32_L((octet *)(p) + 4))
 611 #  define LOAD64_(d, p) LOAD64_B_((d), (p))
 612
 613 #  define STORE64_B_(p, v)                                              \
 614         (STORE32_B((octet *)(p) + 0, (v).hi),                           \
 615          STORE32_B((octet *)(p) + 4, (v).lo))
 616 #  define STORE64_L_(p, v)                                              \
 617         (STORE32_L((octet *)(p) + 0, (v).lo),                           \
 618          STORE32_L((octet *)(p) + 4, (v).hi))
 619 #  define STORE64_(p, v) STORE64_B_((p), (v))
 620
 621 #endif
 622
 623 /* --- Other operations on 64-bit integers --- */
 624
 625 #ifdef HAVE_UINT64
 626 #  define SET64(d, h, l) ((d).i = (U64((h)) << 32) | U64((l)))
 627 #  define ASSIGN64(d, x) ((d).i = U64((x)))
 628 #  define HI64(x) U32((x).i >> 32)
 629 #  define LO64(x) U32((x).i)
 630 #  define GET64(t, x) ((t)(x).i)
 631 #else
 632 #  define SET64(d, h, l) ((d).hi = U32(h), (d).lo = U32(l))
 633 #  define ASSIGN64(d, x)                                                \
 634     ((d).hi = ((x & ~MASK32) >> 16) >> 16, (d).lo = U32(x))
 635 #  define HI64(x) U32((x).hi)
 636 #  define LO64(x) U32((x).lo)
 637 #  define GET64(t, x) (((((t)HI64(x) << 16) << 16) & ~MASK32) | (t)LO64(x))
 638 #endif
 639
 640 #ifdef HAVE_UINT64
 641 #  define AND64(d, x, y) ((d).i = (x).i & (y).i)
 642 #  define OR64(d, x, y) ((d).i = (x).i | (y).i)
 643 #  define XOR64(d, x, y) ((d).i = (x).i ^ (y).i)
 644 #  define CPL64(d, x) ((d).i = ~(x).i)
 645 #  define ADD64(d, x, y) ((d).i = (x).i + (y).i)
 646 #  define SUB64(d, x, y) ((d).i = (x).i - (y).i)
 647 #  define CMP64(x, op, y) ((x).i op (y).i)
 648 #  define ZERO64(x) ((x) == 0)
 649 #else
 650 #  define AND64(d, x, y) ((d).lo = (x).lo & (y).lo, (d).hi = (x).hi & (y).hi)
 651 #  define OR64(d, x, y) ((d).lo = (x).lo | (y).lo, (d).hi = (x).hi | (y).hi)
 652 #  define XOR64(d, x, y) ((d).lo = (x).lo ^ (y).lo, (d).hi = (x).hi ^ (y).hi)
 653 #  define CPL64(d, x) ((d).lo = ~(x).lo, (d).hi = ~(x).hi)
 654 #  define ADD64(d, x, y) do {                                           \
 655      uint32 _x = U32((x).lo + (y).lo);                                  \
 656      (d).hi = (x).hi + (y).hi + (_x < (x).lo);                          \
 657      (d).lo = _x;                                                       \
 658    } while (0)
 659 #  define SUB64(d, x, y) do {                                           \
 660      uint32 _x = U32((x).lo - (y).lo);                                  \
 661      (d).hi = (x).hi - (y).hi - (_x > (x).lo);                          \
 662      (d).lo = _x;                                                       \
 663    } while (0)
 664 #  define CMP64(x, op, y)                                               \
 665     ((x).hi == (y).hi ? (x).lo op (y).lo : (x).hi op (y).hi)
 666 #  define ZERO64(x) ((x).lo == 0 && (x).hi == 0)
 667 #endif
 668
 669 /* --- Storing integers in tables --- */
 670
 671 #ifdef HAVE_UINT64
 672 #  define X64(x, y) { 0x##x##y }
 673 #else
 674 #  define X64(x, y) { 0x##x, 0x##y }
 675 #endif
 676
 677 /*----- That's all, folks -------------------------------------------------*/
 678
 679 #ifdef __cplusplus
 680   }
 681 #endif
 682
 683 #endif