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Comparing libecb/ecb.h (file contents):
Revision 1.144 by root, Fri Oct 17 11:02:20 2014 UTC vs.
Revision 1.165 by sf-exg, Fri May 1 12:02:18 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)
… …
145 #define ECB_NO_SMP 1 148 #define ECB_NO_SMP 1
146#endif 149#endif
147 150
148#if ECB_NO_SMP 151#if ECB_NO_SMP
149 #define ECB_MEMORY_FENCE do { } while (0) 152 #define ECB_MEMORY_FENCE do { } while (0)
153#endif
154
155/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
156#if __xlC__ && ECB_CPP
157 #include <builtins.h>
150#endif 158#endif
151 159
152#ifndef ECB_MEMORY_FENCE 160#ifndef ECB_MEMORY_FENCE
153 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 161 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
154 #if __i386 || __i386__ 162 #if __i386 || __i386__
155 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
156 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 164 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
157 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 165 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
158 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 166 #elif ECB_GCC_AMD64
159 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 167 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
160 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 168 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
161 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 169 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
162 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 170 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
… …
278 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 286 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
279#endif 287#endif
280 288
281/*****************************************************************************/ 289/*****************************************************************************/
282 290
283#if __cplusplus 291#if ECB_CPP
284 #define ecb_inline static inline 292 #define ecb_inline static inline
285#elif ECB_GCC_VERSION(2,5) 293#elif ECB_GCC_VERSION(2,5)
286 #define ecb_inline static __inline__ 294 #define ecb_inline static __inline__
287#elif ECB_C99 295#elif ECB_C99
288 #define ecb_inline static inline 296 #define ecb_inline static inline
… …
302 310
303#define ECB_CONCAT_(a, b) a ## b 311#define ECB_CONCAT_(a, b) a ## b
304#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) 312#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
305#define ECB_STRINGIFY_(a) # a 313#define ECB_STRINGIFY_(a) # a
306#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) 314#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
315#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
307 316
308#define ecb_function_ ecb_inline 317#define ecb_function_ ecb_inline
309 318
310#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) 319#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
311 #define ecb_attribute(attrlist) __attribute__ (attrlist) 320 #define ecb_attribute(attrlist) __attribute__ (attrlist)
… …
336#endif 345#endif
337 346
338/* no emulation for ecb_decltype */ 347/* no emulation for ecb_decltype */
339#if ECB_CPP11 348#if ECB_CPP11
340 // older implementations might have problems with decltype(x)::type, work around it 349 // older implementations might have problems with decltype(x)::type, work around it
341 struct ecb_decltype_t { typedef T type; }; 350 template<class T> struct ecb_decltype_t { typedef T type; };
342 #define ecb_decltype(x) ecb_decltype_t<decltype(x)>::type 351 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
343#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) 352#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
344 #define ecb_decltype(x) __typeof__ (x) 353 #define ecb_decltype(x) __typeof__ (x)
345#endif 354#endif
346 355
347#if _MSC_VER >= 1300 356#if _MSC_VER >= 1300
348 #define ecb_deprecated __declspec(deprecated) 357 #define ecb_deprecated __declspec (deprecated)
349#else 358#else
350 #define ecb_deprecated ecb_attribute ((__deprecated__)) 359 #define ecb_deprecated ecb_attribute ((__deprecated__))
351#endif 360#endif
352 361
362#if _MSC_VER >= 1500
363 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
364#elif ECB_GCC_VERSION(4,5)
365 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
366#else
367 #define ecb_deprecated_message(msg) ecb_deprecated
368#endif
369
370#if _MSC_VER >= 1400
371 #define ecb_noinline __declspec (noinline)
372#else
353#define ecb_noinline ecb_attribute ((__noinline__)) 373 #define ecb_noinline ecb_attribute ((__noinline__))
374#endif
375
354#define ecb_unused ecb_attribute ((__unused__)) 376#define ecb_unused ecb_attribute ((__unused__))
355#define ecb_const ecb_attribute ((__const__)) 377#define ecb_const ecb_attribute ((__const__))
356#define ecb_pure ecb_attribute ((__pure__)) 378#define ecb_pure ecb_attribute ((__pure__))
357 379
358/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ 380#if ECB_C11 || __IBMC_NORETURN
359#if ECB_C11 381 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
360 #define ecb_noreturn _Noreturn 382 #define ecb_noreturn _Noreturn
383#elif ECB_CPP11
384 #define ecb_noreturn [[noreturn]]
385#elif _MSC_VER >= 1200
386 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
387 #define ecb_noreturn __declspec (noreturn)
361#else 388#else
362 #define ecb_noreturn ecb_attribute ((__noreturn__)) 389 #define ecb_noreturn ecb_attribute ((__noreturn__))
363#endif 390#endif
364 391
365#if ECB_GCC_VERSION(4,3) 392#if ECB_GCC_VERSION(4,3)
… …
392 #define ecb_ctz32(x) __builtin_ctz (x) 419 #define ecb_ctz32(x) __builtin_ctz (x)
393 #define ecb_ctz64(x) __builtin_ctzll (x) 420 #define ecb_ctz64(x) __builtin_ctzll (x)
394 #define ecb_popcount32(x) __builtin_popcount (x) 421 #define ecb_popcount32(x) __builtin_popcount (x)
395 /* no popcountll */ 422 /* no popcountll */
396#else 423#else
397 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 424 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
398 ecb_function_ int 425 ecb_function_ ecb_const int
399 ecb_ctz32 (uint32_t x) 426 ecb_ctz32 (uint32_t x)
400 { 427 {
401 int r = 0; 428 int r = 0;
402 429
403 x &= ~x + 1; /* this isolates the lowest bit */ 430 x &= ~x + 1; /* this isolates the lowest bit */
… …
417#endif 444#endif
418 445
419 return r; 446 return r;
420 } 447 }
421 448
422 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 449 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
423 ecb_function_ int 450 ecb_function_ ecb_const int
424 ecb_ctz64 (uint64_t x) 451 ecb_ctz64 (uint64_t x)
425 { 452 {
426 int shift = x & 0xffffffffU ? 0 : 32; 453 int shift = x & 0xffffffffU ? 0 : 32;
427 return ecb_ctz32 (x >> shift) + shift; 454 return ecb_ctz32 (x >> shift) + shift;
428 } 455 }
429 456
430 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 457 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
431 ecb_function_ int 458 ecb_function_ ecb_const int
432 ecb_popcount32 (uint32_t x) 459 ecb_popcount32 (uint32_t x)
433 { 460 {
434 x -= (x >> 1) & 0x55555555; 461 x -= (x >> 1) & 0x55555555;
435 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 462 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
436 x = ((x >> 4) + x) & 0x0f0f0f0f; 463 x = ((x >> 4) + x) & 0x0f0f0f0f;
437 x *= 0x01010101; 464 x *= 0x01010101;
438 465
439 return x >> 24; 466 return x >> 24;
440 } 467 }
441 468
442 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 469 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
443 ecb_function_ int ecb_ld32 (uint32_t x) 470 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
444 { 471 {
445 int r = 0; 472 int r = 0;
446 473
447 if (x >> 16) { x >>= 16; r += 16; } 474 if (x >> 16) { x >>= 16; r += 16; }
448 if (x >> 8) { x >>= 8; r += 8; } 475 if (x >> 8) { x >>= 8; r += 8; }
… …
451 if (x >> 1) { r += 1; } 478 if (x >> 1) { r += 1; }
452 479
453 return r; 480 return r;
454 } 481 }
455 482
456 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 483 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
457 ecb_function_ int ecb_ld64 (uint64_t x) 484 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
458 { 485 {
459 int r = 0; 486 int r = 0;
460 487
461 if (x >> 32) { x >>= 32; r += 32; } 488 if (x >> 32) { x >>= 32; r += 32; }
462 489
463 return r + ecb_ld32 (x); 490 return r + ecb_ld32 (x);
464 } 491 }
465#endif 492#endif
466 493
467ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 494ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
468ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 495ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
469ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; 496ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
470ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } 497ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
471 498
472ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 499ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
473ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 500ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
474{ 501{
475 return ( (x * 0x0802U & 0x22110U) 502 return ( (x * 0x0802U & 0x22110U)
476 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 503 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
477} 504}
478 505
479ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 506ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
480ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 507ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
481{ 508{
482 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 509 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
483 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 510 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
484 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 511 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
485 x = ( x >> 8 ) | ( x << 8); 512 x = ( x >> 8 ) | ( x << 8);
486 513
487 return x; 514 return x;
488} 515}
489 516
490ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 517ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
491ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 518ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
492{ 519{
493 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 520 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
494 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 521 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
495 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 522 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
496 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 523 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
499 return x; 526 return x;
500} 527}
501 528
502/* popcount64 is only available on 64 bit cpus as gcc builtin */ 529/* popcount64 is only available on 64 bit cpus as gcc builtin */
503/* so for this version we are lazy */ 530/* so for this version we are lazy */
504ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 531ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
505ecb_function_ int 532ecb_function_ ecb_const int
506ecb_popcount64 (uint64_t x) 533ecb_popcount64 (uint64_t x)
507{ 534{
508 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 535 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
509} 536}
510 537
511ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 538ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
512ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; 539ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
513ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; 540ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
514ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; 541ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
515ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; 542ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
516ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; 543ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
517ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; 544ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
518ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; 545ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
519 546
520ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 547ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
521ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } 548ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
522ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } 549ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
523ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } 550ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
524ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 551ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
525ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 552ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
526ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 553ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
527ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 554ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
528 555
529#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 556#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
557 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
558 #define ecb_bswap16(x) __builtin_bswap16 (x)
559 #else
530 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 560 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
561 #endif
531 #define ecb_bswap32(x) __builtin_bswap32 (x) 562 #define ecb_bswap32(x) __builtin_bswap32 (x)
532 #define ecb_bswap64(x) __builtin_bswap64 (x) 563 #define ecb_bswap64(x) __builtin_bswap64 (x)
564#elif _MSC_VER
565 #include <stdlib.h>
566 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
567 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
568 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
533#else 569#else
534 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 570 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
535 ecb_function_ uint16_t 571 ecb_function_ ecb_const uint16_t
536 ecb_bswap16 (uint16_t x) 572 ecb_bswap16 (uint16_t x)
537 { 573 {
538 return ecb_rotl16 (x, 8); 574 return ecb_rotl16 (x, 8);
539 } 575 }
540 576
541 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 577 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
542 ecb_function_ uint32_t 578 ecb_function_ ecb_const uint32_t
543 ecb_bswap32 (uint32_t x) 579 ecb_bswap32 (uint32_t x)
544 { 580 {
545 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 581 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
546 } 582 }
547 583
548 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 584 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
549 ecb_function_ uint64_t 585 ecb_function_ ecb_const uint64_t
550 ecb_bswap64 (uint64_t x) 586 ecb_bswap64 (uint64_t x)
551 { 587 {
552 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 588 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
553 } 589 }
554#endif 590#endif
555 591
556#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) 592#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
557 #define ecb_unreachable() __builtin_unreachable () 593 #define ecb_unreachable() __builtin_unreachable ()
558#else 594#else
559 /* this seems to work fine, but gcc always emits a warning for it :/ */ 595 /* this seems to work fine, but gcc always emits a warning for it :/ */
560 ecb_inline void ecb_unreachable (void) ecb_noreturn; 596 ecb_inline ecb_noreturn void ecb_unreachable (void);
561 ecb_inline void ecb_unreachable (void) { } 597 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
562#endif 598#endif
563 599
564/* try to tell the compiler that some condition is definitely true */ 600/* try to tell the compiler that some condition is definitely true */
565#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 601#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
566 602
567ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 603ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
568ecb_inline unsigned char 604ecb_inline ecb_const unsigned char
569ecb_byteorder_helper (void) 605ecb_byteorder_helper (void)
570{ 606{
571 /* the union code still generates code under pressure in gcc, */ 607 /* the union code still generates code under pressure in gcc, */
572 /* but less than using pointers, and always seems to */ 608 /* but less than using pointers, and always seems to */
573 /* successfully return a constant. */ 609 /* successfully return a constant. */
574 /* the reason why we have this horrible preprocessor mess */ 610 /* the reason why we have this horrible preprocessor mess */
575 /* is to avoid it in all cases, at least on common architectures */ 611 /* is to avoid it in all cases, at least on common architectures */
576 /* or when using a recent enough gcc version (>= 4.6) */ 612 /* or when using a recent enough gcc version (>= 4.6) */
577#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 613#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
578 return 0x44; 614 return 0x44;
579#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 615#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
580 return 0x44; 616 return 0x44;
581#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 617#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
582 return 0x11; 618 return 0x11;
… …
588 } u = { 0x11223344 }; 624 } u = { 0x11223344 };
589 return u.c; 625 return u.c;
590#endif 626#endif
591} 627}
592 628
593ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 629ecb_inline ecb_const ecb_bool ecb_big_endian (void);
594ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 630ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
595ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 631ecb_inline ecb_const ecb_bool ecb_little_endian (void);
596ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 632ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
597 633
598#if ECB_GCC_VERSION(3,0) || ECB_C99 634#if ECB_GCC_VERSION(3,0) || ECB_C99
599 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 635 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
600#else 636#else
601 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 637 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
602#endif 638#endif
603 639
604#if __cplusplus 640#if ECB_CPP
605 template<typename T> 641 template<typename T>
606 static inline T ecb_div_rd (T val, T div) 642 static inline T ecb_div_rd (T val, T div)
607 { 643 {
608 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 644 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
609 } 645 }
… …
633 669
634/* basically, everything uses "ieee pure-endian" floating point numbers */ 670/* basically, everything uses "ieee pure-endian" floating point numbers */
635/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 671/* the only noteworthy exception is ancient armle, which uses order 43218765 */
636#if 0 \ 672#if 0 \
637 || __i386 || __i386__ \ 673 || __i386 || __i386__ \
638 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 674 || ECB_GCC_AMD64 \
639 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 675 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
640 || defined __s390__ || defined __s390x__ \ 676 || defined __s390__ || defined __s390x__ \
641 || defined __mips__ \ 677 || defined __mips__ \
642 || defined __alpha__ \ 678 || defined __alpha__ \
643 || defined __hppa__ \ 679 || defined __hppa__ \
644 || defined __ia64__ \ 680 || defined __ia64__ \
645 || defined __m68k__ \ 681 || defined __m68k__ \
646 || defined __m88k__ \ 682 || defined __m88k__ \
647 || defined __sh__ \ 683 || defined __sh__ \
648 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ 684 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
649 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 685 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
650 || defined __aarch64__ 686 || defined __aarch64__
651 #define ECB_STDFP 1 687 #define ECB_STDFP 1
652 #include <string.h> /* for memcpy */ 688 #include <string.h> /* for memcpy */
653#else 689#else
… …
669 #define ECB_NAN NAN 705 #define ECB_NAN NAN
670 #else 706 #else
671 #define ECB_NAN ECB_INFINITY 707 #define ECB_NAN ECB_INFINITY
672 #endif 708 #endif
673 709
710 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
711 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
712 #define ecb_frexpf(x,e) frexpf ((x), (e))
713 #else
714 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
715 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
716 #endif
717
674 /* converts an ieee half/binary16 to a float */ 718 /* converts an ieee half/binary16 to a float */
675 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 719 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
676 ecb_function_ float 720 ecb_function_ ecb_const float
677 ecb_binary16_to_float (uint16_t x) 721 ecb_binary16_to_float (uint16_t x)
678 { 722 {
679 int e = (x >> 10) & 0x1f; 723 int e = (x >> 10) & 0x1f;
680 int m = x & 0x3ff; 724 int m = x & 0x3ff;
681 float r; 725 float r;
682 726
683 if (!e ) r = ldexpf (m , -24); 727 if (!e ) r = ecb_ldexpf (m , -24);
684 else if (e != 31) r = ldexpf (m + 0x400, e - 25); 728 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
685 else if (m ) r = ECB_NAN; 729 else if (m ) r = ECB_NAN;
686 else r = ECB_INFINITY; 730 else r = ECB_INFINITY;
687 731
688 return x & 0x8000 ? -r : r; 732 return x & 0x8000 ? -r : r;
689 } 733 }
690 734
691 /* convert a float to ieee single/binary32 */ 735 /* convert a float to ieee single/binary32 */
692 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 736 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
693 ecb_function_ uint32_t 737 ecb_function_ ecb_const uint32_t
694 ecb_float_to_binary32 (float x) 738 ecb_float_to_binary32 (float x)
695 { 739 {
696 uint32_t r; 740 uint32_t r;
697 741
698 #if ECB_STDFP 742 #if ECB_STDFP
… …
705 if (x == 0e0f ) return 0x00000000U; 749 if (x == 0e0f ) return 0x00000000U;
706 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 750 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
707 if (x < -3.40282346638528860e+38f) return 0xff800000U; 751 if (x < -3.40282346638528860e+38f) return 0xff800000U;
708 if (x != x ) return 0x7fbfffffU; 752 if (x != x ) return 0x7fbfffffU;
709 753
710 m = frexpf (x, &e) * 0x1000000U; 754 m = ecb_frexpf (x, &e) * 0x1000000U;
711 755
712 r = m & 0x80000000U; 756 r = m & 0x80000000U;
713 757
714 if (r) 758 if (r)
715 m = -m; 759 m = -m;
… …
727 771
728 return r; 772 return r;
729 } 773 }
730 774
731 /* converts an ieee single/binary32 to a float */ 775 /* converts an ieee single/binary32 to a float */
732 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 776 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
733 ecb_function_ float 777 ecb_function_ ecb_const float
734 ecb_binary32_to_float (uint32_t x) 778 ecb_binary32_to_float (uint32_t x)
735 { 779 {
736 float r; 780 float r;
737 781
738 #if ECB_STDFP 782 #if ECB_STDFP
… …
748 x |= 0x800000U; 792 x |= 0x800000U;
749 else 793 else
750 e = 1; 794 e = 1;
751 795
752 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 796 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
753 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 797 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
754 798
755 r = neg ? -r : r; 799 r = neg ? -r : r;
756 #endif 800 #endif
757 801
758 return r; 802 return r;
759 } 803 }
760 804
761 /* convert a double to ieee double/binary64 */ 805 /* convert a double to ieee double/binary64 */
762 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 806 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
763 ecb_function_ uint64_t 807 ecb_function_ ecb_const uint64_t
764 ecb_double_to_binary64 (double x) 808 ecb_double_to_binary64 (double x)
765 { 809 {
766 uint64_t r; 810 uint64_t r;
767 811
768 #if ECB_STDFP 812 #if ECB_STDFP
… …
797 841
798 return r; 842 return r;
799 } 843 }
800 844
801 /* converts an ieee double/binary64 to a double */ 845 /* converts an ieee double/binary64 to a double */
802 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 846 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
803 ecb_function_ double 847 ecb_function_ ecb_const double
804 ecb_binary64_to_double (uint64_t x) 848 ecb_binary64_to_double (uint64_t x)
805 { 849 {
806 double r; 850 double r;
807 851
808 #if ECB_STDFP 852 #if ECB_STDFP

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