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Comparing libecb/ecb.h (file contents):
Revision 1.143 by root, Fri Oct 17 10:56:48 2014 UTC vs.
Revision 1.163 by sf-exg, Tue Apr 7 20:40:21 2015 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
5 * Copyright (©) 2011 Emanuele Giaquinta 5 * Copyright (©) 2011 Emanuele Giaquinta
6 * All rights reserved. 6 * All rights reserved.
7 * 7 *
8 * Redistribution and use in source and binary forms, with or without modifica- 8 * Redistribution and use in source and binary forms, with or without modifica-
9 * tion, are permitted provided that the following conditions are met: 9 * tion, are permitted provided that the following conditions are met:
… …
74 #else 74 #else
75 #define ECB_PTRSIZE 4 75 #define ECB_PTRSIZE 4
76 #endif 76 #endif
77#endif 77#endif
78 78
79#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
80#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
81
79/* work around x32 idiocy by defining proper macros */ 82/* work around x32 idiocy by defining proper macros */
80#if __amd64 || __x86_64 || _M_AMD64 || _M_X64 83#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
81 #if _ILP32 84 #if _ILP32
82 #define ECB_AMD64_X32 1 85 #define ECB_AMD64_X32 1
83 #else 86 #else
84 #define ECB_AMD64 1 87 #define ECB_AMD64 1
85 #endif 88 #endif
… …
98 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 101 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
99#endif 102#endif
100 103
101#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) 104#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
102 105
103#if __clang__ && defined(__has_builtin) 106#if __clang__ && defined __has_builtin
104 #define ECB_CLANG_BUILTIN(x) __has_builtin(x) 107 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
105#else 108#else
106 #define ECB_CLANG_BUILTIN(x) 0 109 #define ECB_CLANG_BUILTIN(x) 0
107#endif 110#endif
108 111
109#if __clang__ && defined(__has_extension) 112#if __clang__ && defined __has_extension
110 #define ECB_CLANG_EXTENSION(x) __has_extension(x) 113 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
111#else 114#else
112 #define ECB_CLANG_EXTENSION(x) 0 115 #define ECB_CLANG_EXTENSION(x) 0
113#endif 116#endif
114 117
115#define ECB_CPP (__cplusplus+0) 118#define ECB_CPP (__cplusplus+0)
… …
153 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 156 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
154 #if __i386 || __i386__ 157 #if __i386 || __i386__
155 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 158 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
156 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 159 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
157 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 160 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
158 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 161 #elif ECB_GCC_AMD64
159 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 162 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
160 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 163 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
161 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 164 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
162 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 165 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 166 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
… …
278 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 281 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
279#endif 282#endif
280 283
281/*****************************************************************************/ 284/*****************************************************************************/
282 285
283#if __cplusplus 286#if ECB_CPP
284 #define ecb_inline static inline 287 #define ecb_inline static inline
285#elif ECB_GCC_VERSION(2,5) 288#elif ECB_GCC_VERSION(2,5)
286 #define ecb_inline static __inline__ 289 #define ecb_inline static __inline__
287#elif ECB_C99 290#elif ECB_C99
288 #define ecb_inline static inline 291 #define ecb_inline static inline
… …
302 305
303#define ECB_CONCAT_(a, b) a ## b 306#define ECB_CONCAT_(a, b) a ## b
304#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 307#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
305#define ECB_STRINGIFY_(a) # a 308#define ECB_STRINGIFY_(a) # a
306#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 309#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
310#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
307 311
308#define ecb_function_ ecb_inline 312#define ecb_function_ ecb_inline
309 313
310#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) 314#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
311 #define ecb_attribute(attrlist) __attribute__ (attrlist) 315 #define ecb_attribute(attrlist) __attribute__ (attrlist)
… …
335 #define ecb_prefetch(addr,rw,locality) 339 #define ecb_prefetch(addr,rw,locality)
336#endif 340#endif
337 341
338/* no emulation for ecb_decltype */ 342/* no emulation for ecb_decltype */
339#if ECB_CPP11 343#if ECB_CPP11
344 // older implementations might have problems with decltype(x)::type, work around it
345 template<class T> struct ecb_decltype_t { typedef T type; };
340 #define ecb_decltype(x) decltype (x) 346 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
341#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) 347#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
342 #define ecb_decltype(x) __typeof__ (x) 348 #define ecb_decltype(x) __typeof__ (x)
343#endif 349#endif
344 350
345#if _MSC_VER >= 1300 351#if _MSC_VER >= 1300
346 #define ecb_deprecated __declspec(deprecated) 352 #define ecb_deprecated __declspec (deprecated)
347#else 353#else
348 #define ecb_deprecated ecb_attribute ((__deprecated__)) 354 #define ecb_deprecated ecb_attribute ((__deprecated__))
349#endif 355#endif
350 356
357#if _MSC_VER >= 1500
358 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
359#elif ECB_GCC_VERSION(4,5)
360 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
361#else
362 #define ecb_deprecated_message(msg) ecb_deprecated
363#endif
364
365#if _MSC_VER >= 1400
366 #define ecb_noinline __declspec (noinline)
367#else
351#define ecb_noinline ecb_attribute ((__noinline__)) 368 #define ecb_noinline ecb_attribute ((__noinline__))
369#endif
370
352#define ecb_unused ecb_attribute ((__unused__)) 371#define ecb_unused ecb_attribute ((__unused__))
353#define ecb_const ecb_attribute ((__const__)) 372#define ecb_const ecb_attribute ((__const__))
354#define ecb_pure ecb_attribute ((__pure__)) 373#define ecb_pure ecb_attribute ((__pure__))
355 374
356/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ 375#if ECB_C11 || __IBMC_NORETURN
357#if ECB_C11 376 /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
358 #define ecb_noreturn _Noreturn 377 #define ecb_noreturn _Noreturn
378#elif ECB_CPP11
379 #define ecb_noreturn [[noreturn]]
380#elif _MSC_VER >= 1200
381 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
382 #define ecb_noreturn __declspec (noreturn)
359#else 383#else
360 #define ecb_noreturn ecb_attribute ((__noreturn__)) 384 #define ecb_noreturn ecb_attribute ((__noreturn__))
361#endif 385#endif
362 386
363#if ECB_GCC_VERSION(4,3) 387#if ECB_GCC_VERSION(4,3)
… …
390 #define ecb_ctz32(x) __builtin_ctz (x) 414 #define ecb_ctz32(x) __builtin_ctz (x)
391 #define ecb_ctz64(x) __builtin_ctzll (x) 415 #define ecb_ctz64(x) __builtin_ctzll (x)
392 #define ecb_popcount32(x) __builtin_popcount (x) 416 #define ecb_popcount32(x) __builtin_popcount (x)
393 /* no popcountll */ 417 /* no popcountll */
394#else 418#else
395 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 419 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
396 ecb_function_ int 420 ecb_function_ ecb_const int
397 ecb_ctz32 (uint32_t x) 421 ecb_ctz32 (uint32_t x)
398 { 422 {
399 int r = 0; 423 int r = 0;
400 424
401 x &= ~x + 1; /* this isolates the lowest bit */ 425 x &= ~x + 1; /* this isolates the lowest bit */
… …
415#endif 439#endif
416 440
417 return r; 441 return r;
418 } 442 }
419 443
420 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 444 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
421 ecb_function_ int 445 ecb_function_ ecb_const int
422 ecb_ctz64 (uint64_t x) 446 ecb_ctz64 (uint64_t x)
423 { 447 {
424 int shift = x & 0xffffffffU ? 0 : 32; 448 int shift = x & 0xffffffffU ? 0 : 32;
425 return ecb_ctz32 (x >> shift) + shift; 449 return ecb_ctz32 (x >> shift) + shift;
426 } 450 }
427 451
428 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 452 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
429 ecb_function_ int 453 ecb_function_ ecb_const int
430 ecb_popcount32 (uint32_t x) 454 ecb_popcount32 (uint32_t x)
431 { 455 {
432 x -= (x >> 1) & 0x55555555; 456 x -= (x >> 1) & 0x55555555;
433 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 457 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
434 x = ((x >> 4) + x) & 0x0f0f0f0f; 458 x = ((x >> 4) + x) & 0x0f0f0f0f;
435 x *= 0x01010101; 459 x *= 0x01010101;
436 460
437 return x >> 24; 461 return x >> 24;
438 } 462 }
439 463
440 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 464 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
441 ecb_function_ int ecb_ld32 (uint32_t x) 465 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
442 { 466 {
443 int r = 0; 467 int r = 0;
444 468
445 if (x >> 16) { x >>= 16; r += 16; } 469 if (x >> 16) { x >>= 16; r += 16; }
446 if (x >> 8) { x >>= 8; r += 8; } 470 if (x >> 8) { x >>= 8; r += 8; }
… …
449 if (x >> 1) { r += 1; } 473 if (x >> 1) { r += 1; }
450 474
451 return r; 475 return r;
452 } 476 }
453 477
454 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 478 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
455 ecb_function_ int ecb_ld64 (uint64_t x) 479 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
456 { 480 {
457 int r = 0; 481 int r = 0;
458 482
459 if (x >> 32) { x >>= 32; r += 32; } 483 if (x >> 32) { x >>= 32; r += 32; }
460 484
461 return r + ecb_ld32 (x); 485 return r + ecb_ld32 (x);
462 } 486 }
463#endif 487#endif
464 488
465ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 489ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
466ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 490ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
467ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 491ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
468ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 492ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
469 493
470ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 494ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
471ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 495ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
472{ 496{
473 return ( (x * 0x0802U & 0x22110U) 497 return ( (x * 0x0802U & 0x22110U)
474 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 498 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
475} 499}
476 500
477ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 501ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
478ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 502ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
479{ 503{
480 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 504 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
481 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 505 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
482 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 506 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
483 x = ( x >> 8 ) | ( x << 8); 507 x = ( x >> 8 ) | ( x << 8);
484 508
485 return x; 509 return x;
486} 510}
487 511
488ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 512ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
489ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 513ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
490{ 514{
491 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 515 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
492 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 516 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
493 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 517 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
494 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 518 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
497 return x; 521 return x;
498} 522}
499 523
500/* popcount64 is only available on 64 bit cpus as gcc builtin */ 524/* popcount64 is only available on 64 bit cpus as gcc builtin */
501/* so for this version we are lazy */ 525/* so for this version we are lazy */
502ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 526ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
503ecb_function_ int 527ecb_function_ ecb_const int
504ecb_popcount64 (uint64_t x) 528ecb_popcount64 (uint64_t x)
505{ 529{
506 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 530 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
507} 531}
508 532
509ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 533ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
510ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 534ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
511ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 535ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
512ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 536ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
513ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 537ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
514ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 538ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
515ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 539ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
516ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 540ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
517 541
518ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 542ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
519ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 543ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
520ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 544ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
521ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 545ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
522ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 546ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
523ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 547ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
524ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 548ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
525ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 549ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
526 550
527#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 551#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
528 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 552 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
529 #define ecb_bswap32(x) __builtin_bswap32 (x) 553 #define ecb_bswap32(x) __builtin_bswap32 (x)
530 #define ecb_bswap64(x) __builtin_bswap64 (x) 554 #define ecb_bswap64(x) __builtin_bswap64 (x)
531#else 555#else
532 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 556 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
533 ecb_function_ uint16_t 557 ecb_function_ ecb_const uint16_t
534 ecb_bswap16 (uint16_t x) 558 ecb_bswap16 (uint16_t x)
535 { 559 {
536 return ecb_rotl16 (x, 8); 560 return ecb_rotl16 (x, 8);
537 } 561 }
538 562
539 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 563 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
540 ecb_function_ uint32_t 564 ecb_function_ ecb_const uint32_t
541 ecb_bswap32 (uint32_t x) 565 ecb_bswap32 (uint32_t x)
542 { 566 {
543 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 567 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
544 } 568 }
545 569
546 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 570 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
547 ecb_function_ uint64_t 571 ecb_function_ ecb_const uint64_t
548 ecb_bswap64 (uint64_t x) 572 ecb_bswap64 (uint64_t x)
549 { 573 {
550 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 574 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
551 } 575 }
552#endif 576#endif
553 577
554#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) 578#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
555 #define ecb_unreachable() __builtin_unreachable () 579 #define ecb_unreachable() __builtin_unreachable ()
556#else 580#else
557 /* this seems to work fine, but gcc always emits a warning for it :/ */ 581 /* this seems to work fine, but gcc always emits a warning for it :/ */
558 ecb_inline void ecb_unreachable (void) ecb_noreturn; 582 ecb_inline ecb_noreturn void ecb_unreachable (void);
559 ecb_inline void ecb_unreachable (void) { } 583 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
560#endif 584#endif
561 585
562/* try to tell the compiler that some condition is definitely true */ 586/* try to tell the compiler that some condition is definitely true */
563#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 587#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
564 588
565ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 589ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
566ecb_inline unsigned char 590ecb_inline ecb_const unsigned char
567ecb_byteorder_helper (void) 591ecb_byteorder_helper (void)
568{ 592{
569 /* the union code still generates code under pressure in gcc, */ 593 /* the union code still generates code under pressure in gcc, */
570 /* but less than using pointers, and always seems to */ 594 /* but less than using pointers, and always seems to */
571 /* successfully return a constant. */ 595 /* successfully return a constant. */
572 /* the reason why we have this horrible preprocessor mess */ 596 /* the reason why we have this horrible preprocessor mess */
573 /* is to avoid it in all cases, at least on common architectures */ 597 /* is to avoid it in all cases, at least on common architectures */
574 /* or when using a recent enough gcc version (>= 4.6) */ 598 /* or when using a recent enough gcc version (>= 4.6) */
575#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 599#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 return 0x44; 600 return 0x44;
577#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 601#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
578 return 0x44; 602 return 0x44;
579#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 603#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
580 return 0x11; 604 return 0x11;
… …
586 } u = { 0x11223344 }; 610 } u = { 0x11223344 };
587 return u.c; 611 return u.c;
588#endif 612#endif
589} 613}
590 614
591ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 615ecb_inline ecb_const ecb_bool ecb_big_endian (void);
592ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 616ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
593ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 617ecb_inline ecb_const ecb_bool ecb_little_endian (void);
594ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 618ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
595 619
596#if ECB_GCC_VERSION(3,0) || ECB_C99 620#if ECB_GCC_VERSION(3,0) || ECB_C99
597 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 621 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
598#else 622#else
599 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 623 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
600#endif 624#endif
601 625
602#if __cplusplus 626#if ECB_CPP
603 template<typename T> 627 template<typename T>
604 static inline T ecb_div_rd (T val, T div) 628 static inline T ecb_div_rd (T val, T div)
605 { 629 {
606 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 630 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
607 } 631 }
… …
631 655
632/* basically, everything uses "ieee pure-endian" floating point numbers */ 656/* basically, everything uses "ieee pure-endian" floating point numbers */
633/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 657/* the only noteworthy exception is ancient armle, which uses order 43218765 */
634#if 0 \ 658#if 0 \
635 || __i386 || __i386__ \ 659 || __i386 || __i386__ \
636 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 660 || ECB_GCC_AMD64 \
637 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 661 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
638 || defined __s390__ || defined __s390x__ \ 662 || defined __s390__ || defined __s390x__ \
639 || defined __mips__ \ 663 || defined __mips__ \
640 || defined __alpha__ \ 664 || defined __alpha__ \
641 || defined __hppa__ \ 665 || defined __hppa__ \
642 || defined __ia64__ \ 666 || defined __ia64__ \
643 || defined __m68k__ \ 667 || defined __m68k__ \
644 || defined __m88k__ \ 668 || defined __m88k__ \
645 || defined __sh__ \ 669 || defined __sh__ \
646 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ 670 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
647 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 671 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
648 || defined __aarch64__ 672 || defined __aarch64__
649 #define ECB_STDFP 1 673 #define ECB_STDFP 1
650 #include <string.h> /* for memcpy */ 674 #include <string.h> /* for memcpy */
651#else 675#else
… …
667 #define ECB_NAN NAN 691 #define ECB_NAN NAN
668 #else 692 #else
669 #define ECB_NAN ECB_INFINITY 693 #define ECB_NAN ECB_INFINITY
670 #endif 694 #endif
671 695
696 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
697 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
698 #define ecb_frexpf(x,e) frexpf ((x), (e))
699 #else
700 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
701 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
702 #endif
703
672 /* converts an ieee half/binary16 to a float */ 704 /* converts an ieee half/binary16 to a float */
673 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 705 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
674 ecb_function_ float 706 ecb_function_ ecb_const float
675 ecb_binary16_to_float (uint16_t x) 707 ecb_binary16_to_float (uint16_t x)
676 { 708 {
677 int e = (x >> 10) & 0x1f; 709 int e = (x >> 10) & 0x1f;
678 int m = x & 0x3ff; 710 int m = x & 0x3ff;
679 float r; 711 float r;
680 712
681 if (!e ) r = ldexpf (m , -24); 713 if (!e ) r = ecb_ldexpf (m , -24);
682 else if (e != 31) r = ldexpf (m + 0x400, e - 25); 714 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
683 else if (m ) r = ECB_NAN; 715 else if (m ) r = ECB_NAN;
684 else r = ECB_INFINITY; 716 else r = ECB_INFINITY;
685 717
686 return x & 0x8000 ? -r : r; 718 return x & 0x8000 ? -r : r;
687 } 719 }
688 720
689 /* convert a float to ieee single/binary32 */ 721 /* convert a float to ieee single/binary32 */
690 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 722 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
691 ecb_function_ uint32_t 723 ecb_function_ ecb_const uint32_t
692 ecb_float_to_binary32 (float x) 724 ecb_float_to_binary32 (float x)
693 { 725 {
694 uint32_t r; 726 uint32_t r;
695 727
696 #if ECB_STDFP 728 #if ECB_STDFP
… …
703 if (x == 0e0f ) return 0x00000000U; 735 if (x == 0e0f ) return 0x00000000U;
704 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 736 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
705 if (x < -3.40282346638528860e+38f) return 0xff800000U; 737 if (x < -3.40282346638528860e+38f) return 0xff800000U;
706 if (x != x ) return 0x7fbfffffU; 738 if (x != x ) return 0x7fbfffffU;
707 739
708 m = frexpf (x, &e) * 0x1000000U; 740 m = ecb_frexpf (x, &e) * 0x1000000U;
709 741
710 r = m & 0x80000000U; 742 r = m & 0x80000000U;
711 743
712 if (r) 744 if (r)
713 m = -m; 745 m = -m;
… …
725 757
726 return r; 758 return r;
727 } 759 }
728 760
729 /* converts an ieee single/binary32 to a float */ 761 /* converts an ieee single/binary32 to a float */
730 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 762 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
731 ecb_function_ float 763 ecb_function_ ecb_const float
732 ecb_binary32_to_float (uint32_t x) 764 ecb_binary32_to_float (uint32_t x)
733 { 765 {
734 float r; 766 float r;
735 767
736 #if ECB_STDFP 768 #if ECB_STDFP
… …
746 x |= 0x800000U; 778 x |= 0x800000U;
747 else 779 else
748 e = 1; 780 e = 1;
749 781
750 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 782 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
751 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 783 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
752 784
753 r = neg ? -r : r; 785 r = neg ? -r : r;
754 #endif 786 #endif
755 787
756 return r; 788 return r;
757 } 789 }
758 790
759 /* convert a double to ieee double/binary64 */ 791 /* convert a double to ieee double/binary64 */
760 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 792 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
761 ecb_function_ uint64_t 793 ecb_function_ ecb_const uint64_t
762 ecb_double_to_binary64 (double x) 794 ecb_double_to_binary64 (double x)
763 { 795 {
764 uint64_t r; 796 uint64_t r;
765 797
766 #if ECB_STDFP 798 #if ECB_STDFP
… …
795 827
796 return r; 828 return r;
797 } 829 }
798 830
799 /* converts an ieee double/binary64 to a double */ 831 /* converts an ieee double/binary64 to a double */
800 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 832 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
801 ecb_function_ double 833 ecb_function_ ecb_const double
802 ecb_binary64_to_double (uint64_t x) 834 ecb_binary64_to_double (uint64_t x)
803 { 835 {
804 double r; 836 double r;
805 837
806 #if ECB_STDFP 838 #if ECB_STDFP

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