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Comparing libecb/ecb.h (file contents):
Revision 1.142 by root, Thu Oct 16 14:45:44 2014 UTC vs.
Revision 1.152 by root, Wed Feb 11 19:12:42 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:
… …
98 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 98 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
99#endif 99#endif
100 100
101#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) 101#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
102 102
103#if __clang__ && defined(__has_builtin) 103#if __clang__ && defined __has_builtin
104 #define ECB_CLANG_BUILTIN(x) __has_builtin(x) 104 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
105#else 105#else
106 #define ECB_CLANG_BUILTIN(x) 0 106 #define ECB_CLANG_BUILTIN(x) 0
107#endif 107#endif
108 108
109#if __clang__ && defined(__has_extension) 109#if __clang__ && defined __has_extension
110 #define ECB_CLANG_EXTENSION(x) __has_extension(x) 110 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
111#else 111#else
112 #define ECB_CLANG_EXTENSION(x) 0 112 #define ECB_CLANG_EXTENSION(x) 0
113#endif 113#endif
114 114
115#define ECB_CPP (__cplusplus+0) 115#define ECB_CPP (__cplusplus+0)
… …
278 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 278 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
279#endif 279#endif
280 280
281/*****************************************************************************/ 281/*****************************************************************************/
282 282
283#if __cplusplus 283#if ECB_CPP
284 #define ecb_inline static inline 284 #define ecb_inline static inline
285#elif ECB_GCC_VERSION(2,5) 285#elif ECB_GCC_VERSION(2,5)
286 #define ecb_inline static __inline__ 286 #define ecb_inline static __inline__
287#elif ECB_C99 287#elif ECB_C99
288 #define ecb_inline static inline 288 #define ecb_inline static inline
… …
334#else 334#else
335 #define ecb_prefetch(addr,rw,locality) 335 #define ecb_prefetch(addr,rw,locality)
336#endif 336#endif
337 337
338/* no emulation for ecb_decltype */ 338/* no emulation for ecb_decltype */
339#if ECB_GCC_VERSION(4,5) 339#if ECB_CPP11
340 // older implementations might have problems with decltype(x)::type, work around it
341 template<class T> struct ecb_decltype_t { typedef T type; };
340 #define ecb_decltype(x) __decltype (x) 342 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
341#elif ECB_GCC_VERSION(3,0) 343#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
342 #define ecb_decltype(x) __typeof (x) 344 #define ecb_decltype(x) __typeof__ (x)
343#elif ECB_CPP11
344 #define ecb_decltype(x) decltype (x)
345#endif 345#endif
346 346
347#if _MSC_VER >= 1300 347#if _MSC_VER >= 1300
348 #define ecb_deprecated __declspec(deprecated) 348 #define ecb_deprecated __declspec (deprecated)
349#else 349#else
350 #define ecb_deprecated ecb_attribute ((__deprecated__)) 350 #define ecb_deprecated ecb_attribute ((__deprecated__))
351#endif 351#endif
352 352
353#define ecb_noinline ecb_attribute ((__noinline__)) 353#define ecb_noinline ecb_attribute ((__noinline__))
354#define ecb_unused ecb_attribute ((__unused__)) 354#define ecb_unused ecb_attribute ((__unused__))
355#define ecb_const ecb_attribute ((__const__)) 355#define ecb_const ecb_attribute ((__const__))
356#define ecb_pure ecb_attribute ((__pure__)) 356#define ecb_pure ecb_attribute ((__pure__))
357 357
358/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ 358/* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
359#if ECB_C11 359#if ECB_C11 || __IBMC_NORETURN
360 /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
360 #define ecb_noreturn _Noreturn 361 #define ecb_noreturn _Noreturn
361#else 362#else
362 #define ecb_noreturn ecb_attribute ((__noreturn__)) 363 #define ecb_noreturn ecb_attribute ((__noreturn__))
363#endif 364#endif
364 365
… …
392 #define ecb_ctz32(x) __builtin_ctz (x) 393 #define ecb_ctz32(x) __builtin_ctz (x)
393 #define ecb_ctz64(x) __builtin_ctzll (x) 394 #define ecb_ctz64(x) __builtin_ctzll (x)
394 #define ecb_popcount32(x) __builtin_popcount (x) 395 #define ecb_popcount32(x) __builtin_popcount (x)
395 /* no popcountll */ 396 /* no popcountll */
396#else 397#else
397 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; 398 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
398 ecb_function_ int 399 ecb_function_ ecb_const int
399 ecb_ctz32 (uint32_t x) 400 ecb_ctz32 (uint32_t x)
400 { 401 {
401 int r = 0; 402 int r = 0;
402 403
403 x &= ~x + 1; /* this isolates the lowest bit */ 404 x &= ~x + 1; /* this isolates the lowest bit */
… …
417#endif 418#endif
418 419
419 return r; 420 return r;
420 } 421 }
421 422
422 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; 423 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
423 ecb_function_ int 424 ecb_function_ ecb_const int
424 ecb_ctz64 (uint64_t x) 425 ecb_ctz64 (uint64_t x)
425 { 426 {
426 int shift = x & 0xffffffffU ? 0 : 32; 427 int shift = x & 0xffffffffU ? 0 : 32;
427 return ecb_ctz32 (x >> shift) + shift; 428 return ecb_ctz32 (x >> shift) + shift;
428 } 429 }
429 430
430 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; 431 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
431 ecb_function_ int 432 ecb_function_ ecb_const int
432 ecb_popcount32 (uint32_t x) 433 ecb_popcount32 (uint32_t x)
433 { 434 {
434 x -= (x >> 1) & 0x55555555; 435 x -= (x >> 1) & 0x55555555;
435 x = ((x >> 2) & 0x33333333) + (x & 0x33333333); 436 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
436 x = ((x >> 4) + x) & 0x0f0f0f0f; 437 x = ((x >> 4) + x) & 0x0f0f0f0f;
437 x *= 0x01010101; 438 x *= 0x01010101;
438 439
439 return x >> 24; 440 return x >> 24;
440 } 441 }
441 442
442 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; 443 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
443 ecb_function_ int ecb_ld32 (uint32_t x) 444 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
444 { 445 {
445 int r = 0; 446 int r = 0;
446 447
447 if (x >> 16) { x >>= 16; r += 16; } 448 if (x >> 16) { x >>= 16; r += 16; }
448 if (x >> 8) { x >>= 8; r += 8; } 449 if (x >> 8) { x >>= 8; r += 8; }
… …
451 if (x >> 1) { r += 1; } 452 if (x >> 1) { r += 1; }
452 453
453 return r; 454 return r;
454 } 455 }
455 456
456 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; 457 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
457 ecb_function_ int ecb_ld64 (uint64_t x) 458 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
458 { 459 {
459 int r = 0; 460 int r = 0;
460 461
461 if (x >> 32) { x >>= 32; r += 32; } 462 if (x >> 32) { x >>= 32; r += 32; }
462 463
463 return r + ecb_ld32 (x); 464 return r + ecb_ld32 (x);
464 } 465 }
465#endif 466#endif
466 467
467ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; 468ecb_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)); } 469ecb_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; 470ecb_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)); } 471ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
471 472
472ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 473ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
473ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 474ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
474{ 475{
475 return ( (x * 0x0802U & 0x22110U) 476 return ( (x * 0x0802U & 0x22110U)
476 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 477 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
477} 478}
478 479
479ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; 480ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
480ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 481ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
481{ 482{
482 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 483 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
483 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 484 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
484 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 485 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
485 x = ( x >> 8 ) | ( x << 8); 486 x = ( x >> 8 ) | ( x << 8);
486 487
487 return x; 488 return x;
488} 489}
489 490
490ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; 491ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
491ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 492ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
492{ 493{
493 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 494 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
494 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 495 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
495 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 496 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
496 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); 497 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
… …
499 return x; 500 return x;
500} 501}
501 502
502/* popcount64 is only available on 64 bit cpus as gcc builtin */ 503/* popcount64 is only available on 64 bit cpus as gcc builtin */
503/* so for this version we are lazy */ 504/* so for this version we are lazy */
504ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 505ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
505ecb_function_ int 506ecb_function_ ecb_const int
506ecb_popcount64 (uint64_t x) 507ecb_popcount64 (uint64_t x)
507{ 508{
508 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); 509 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
509} 510}
510 511
511ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; 512ecb_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; 513ecb_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; 514ecb_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; 515ecb_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; 516ecb_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; 517ecb_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; 518ecb_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; 519ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
519 520
520ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } 521ecb_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); } 522ecb_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); } 523ecb_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); } 524ecb_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); } 525ecb_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); } 526ecb_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); } 527ecb_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); } 528ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
528 529
529#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 530#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
530 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 531 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
531 #define ecb_bswap32(x) __builtin_bswap32 (x) 532 #define ecb_bswap32(x) __builtin_bswap32 (x)
532 #define ecb_bswap64(x) __builtin_bswap64 (x) 533 #define ecb_bswap64(x) __builtin_bswap64 (x)
533#else 534#else
534 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; 535 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
535 ecb_function_ uint16_t 536 ecb_function_ ecb_const uint16_t
536 ecb_bswap16 (uint16_t x) 537 ecb_bswap16 (uint16_t x)
537 { 538 {
538 return ecb_rotl16 (x, 8); 539 return ecb_rotl16 (x, 8);
539 } 540 }
540 541
541 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; 542 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
542 ecb_function_ uint32_t 543 ecb_function_ ecb_const uint32_t
543 ecb_bswap32 (uint32_t x) 544 ecb_bswap32 (uint32_t x)
544 { 545 {
545 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); 546 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
546 } 547 }
547 548
548 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; 549 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
549 ecb_function_ uint64_t 550 ecb_function_ ecb_const uint64_t
550 ecb_bswap64 (uint64_t x) 551 ecb_bswap64 (uint64_t x)
551 { 552 {
552 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); 553 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
553 } 554 }
554#endif 555#endif
555 556
556#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) 557#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
557 #define ecb_unreachable() __builtin_unreachable () 558 #define ecb_unreachable() __builtin_unreachable ()
558#else 559#else
559 /* this seems to work fine, but gcc always emits a warning for it :/ */ 560 /* this seems to work fine, but gcc always emits a warning for it :/ */
560 ecb_inline void ecb_unreachable (void) ecb_noreturn; 561 ecb_inline ecb_noreturn void ecb_unreachable (void);
561 ecb_inline void ecb_unreachable (void) { } 562 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
562#endif 563#endif
563 564
564/* try to tell the compiler that some condition is definitely true */ 565/* try to tell the compiler that some condition is definitely true */
565#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 566#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
566 567
567ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 568ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
568ecb_inline unsigned char 569ecb_inline ecb_const unsigned char
569ecb_byteorder_helper (void) 570ecb_byteorder_helper (void)
570{ 571{
571 /* the union code still generates code under pressure in gcc, */ 572 /* the union code still generates code under pressure in gcc, */
572 /* but less than using pointers, and always seems to */ 573 /* but less than using pointers, and always seems to */
573 /* successfully return a constant. */ 574 /* successfully return a constant. */
… …
588 } u = { 0x11223344 }; 589 } u = { 0x11223344 };
589 return u.c; 590 return u.c;
590#endif 591#endif
591} 592}
592 593
593ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 594ecb_inline ecb_const ecb_bool ecb_big_endian (void);
594ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 595ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
595ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 596ecb_inline ecb_const ecb_bool ecb_little_endian (void);
596ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 597ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
597 598
598#if ECB_GCC_VERSION(3,0) || ECB_C99 599#if ECB_GCC_VERSION(3,0) || ECB_C99
599 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 600 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
600#else 601#else
601 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 602 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
602#endif 603#endif
603 604
604#if __cplusplus 605#if ECB_CPP
605 template<typename T> 606 template<typename T>
606 static inline T ecb_div_rd (T val, T div) 607 static inline T ecb_div_rd (T val, T div)
607 { 608 {
608 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; 609 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
609 } 610 }
… …
669 #define ECB_NAN NAN 670 #define ECB_NAN NAN
670 #else 671 #else
671 #define ECB_NAN ECB_INFINITY 672 #define ECB_NAN ECB_INFINITY
672 #endif 673 #endif
673 674
675 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
676 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
677 #else
678 #define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
679 #endif
680
674 /* converts an ieee half/binary16 to a float */ 681 /* converts an ieee half/binary16 to a float */
675 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; 682 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
676 ecb_function_ float 683 ecb_function_ ecb_const float
677 ecb_binary16_to_float (uint16_t x) 684 ecb_binary16_to_float (uint16_t x)
678 { 685 {
679 int e = (x >> 10) & 0x1f; 686 int e = (x >> 10) & 0x1f;
680 int m = x & 0x3ff; 687 int m = x & 0x3ff;
681 float r; 688 float r;
682 689
683 if (!e ) r = ldexpf (m , -24); 690 if (!e ) r = ecb_ldexpf (m , -24);
684 else if (e != 31) r = ldexpf (m + 0x400, e - 25); 691 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
685 else if (m ) r = ECB_NAN; 692 else if (m ) r = ECB_NAN;
686 else r = ECB_INFINITY; 693 else r = ECB_INFINITY;
687 694
688 return x & 0x8000 ? -r : r; 695 return x & 0x8000 ? -r : r;
689 } 696 }
690 697
691 /* convert a float to ieee single/binary32 */ 698 /* convert a float to ieee single/binary32 */
692 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 699 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
693 ecb_function_ uint32_t 700 ecb_function_ ecb_const uint32_t
694 ecb_float_to_binary32 (float x) 701 ecb_float_to_binary32 (float x)
695 { 702 {
696 uint32_t r; 703 uint32_t r;
697 704
698 #if ECB_STDFP 705 #if ECB_STDFP
… …
727 734
728 return r; 735 return r;
729 } 736 }
730 737
731 /* converts an ieee single/binary32 to a float */ 738 /* converts an ieee single/binary32 to a float */
732 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; 739 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
733 ecb_function_ float 740 ecb_function_ ecb_const float
734 ecb_binary32_to_float (uint32_t x) 741 ecb_binary32_to_float (uint32_t x)
735 { 742 {
736 float r; 743 float r;
737 744
738 #if ECB_STDFP 745 #if ECB_STDFP
… …
748 x |= 0x800000U; 755 x |= 0x800000U;
749 else 756 else
750 e = 1; 757 e = 1;
751 758
752 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 759 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
753 r = ldexpf (x * (0.5f / 0x800000U), e - 126); 760 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
754 761
755 r = neg ? -r : r; 762 r = neg ? -r : r;
756 #endif 763 #endif
757 764
758 return r; 765 return r;
759 } 766 }
760 767
761 /* convert a double to ieee double/binary64 */ 768 /* convert a double to ieee double/binary64 */
762 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; 769 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
763 ecb_function_ uint64_t 770 ecb_function_ ecb_const uint64_t
764 ecb_double_to_binary64 (double x) 771 ecb_double_to_binary64 (double x)
765 { 772 {
766 uint64_t r; 773 uint64_t r;
767 774
768 #if ECB_STDFP 775 #if ECB_STDFP
… …
797 804
798 return r; 805 return r;
799 } 806 }
800 807
801 /* converts an ieee double/binary64 to a double */ 808 /* converts an ieee double/binary64 to a double */
802 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; 809 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
803 ecb_function_ double 810 ecb_function_ ecb_const double
804 ecb_binary64_to_double (uint64_t x) 811 ecb_binary64_to_double (uint64_t x)
805 { 812 {
806 double r; 813 double r;
807 814
808 #if ECB_STDFP 815 #if ECB_STDFP

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