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Comparing libecb/ecb.h (file contents):
Revision 1.157 by root, Fri Feb 20 17:17:26 2015 UTC vs.
Revision 1.172 by root, Tue Nov 24 22:12:00 2015 UTC

… …
40 40
41#ifndef ECB_H 41#ifndef ECB_H
42#define ECB_H 42#define ECB_H
43 43
44/* 16 bits major, 16 bits minor */ 44/* 16 bits major, 16 bits minor */
45#define ECB_VERSION 0x00010004 45#define ECB_VERSION 0x00010005
46 46
47#ifdef _WIN32 47#ifdef _WIN32
48 typedef signed char int8_t; 48 typedef signed char int8_t;
49 typedef unsigned char uint8_t; 49 typedef unsigned char uint8_t;
50 typedef signed short int16_t; 50 typedef signed short int16_t;
… …
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
… …
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)
150#endif 153#endif
151 154
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>
158#endif
159
160#if 1400 <= _MSC_VER
161 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
162#endif
163
152#ifndef ECB_MEMORY_FENCE 164#ifndef ECB_MEMORY_FENCE
153 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 165 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
154 #if __i386 || __i386__ 166 #if __i386 || __i386__
155 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 167 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
156 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 168 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
157 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 169 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
158 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 170 #elif ECB_GCC_AMD64
159 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
160 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 172 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
161 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 173 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
162 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 174 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 175 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
… …
167 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 179 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
168 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 180 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
169 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 181 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
170 #elif __aarch64__ 182 #elif __aarch64__
171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") 183 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
172 #elif (__sparc || __sparc__) && !__sparcv8 184 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
173 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 185 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
174 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 186 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
175 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 187 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
176 #elif defined __s390__ || defined __s390x__ 188 #elif defined __s390__ || defined __s390x__
177 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 189 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
… …
349 #define ecb_deprecated __declspec (deprecated) 361 #define ecb_deprecated __declspec (deprecated)
350#else 362#else
351 #define ecb_deprecated ecb_attribute ((__deprecated__)) 363 #define ecb_deprecated ecb_attribute ((__deprecated__))
352#endif 364#endif
353 365
354#if __MSC_VER >= 1500 366#if _MSC_VER >= 1500
355 #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) 367 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
356#elif ECB_GCC_VERSION(4,5) 368#elif ECB_GCC_VERSION(4,5)
357 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) 369 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
358#else 370#else
359 #define ecb_deprecated_message(msg) ecb_deprecated 371 #define ecb_deprecated_message(msg) ecb_deprecated
… …
368#define ecb_unused ecb_attribute ((__unused__)) 380#define ecb_unused ecb_attribute ((__unused__))
369#define ecb_const ecb_attribute ((__const__)) 381#define ecb_const ecb_attribute ((__const__))
370#define ecb_pure ecb_attribute ((__pure__)) 382#define ecb_pure ecb_attribute ((__pure__))
371 383
372#if ECB_C11 || __IBMC_NORETURN 384#if ECB_C11 || __IBMC_NORETURN
373 /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */ 385 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
374 #define ecb_noreturn _Noreturn 386 #define ecb_noreturn _Noreturn
375#elif ECB_CPP11 387#elif ECB_CPP11
376 #define ecb_noreturn [[noreturn]] 388 #define ecb_noreturn [[noreturn]]
377#elif _MSC_VER >= 1200 389#elif _MSC_VER >= 1200
378 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ 390 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
… …
415#else 427#else
416 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); 428 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
417 ecb_function_ ecb_const int 429 ecb_function_ ecb_const int
418 ecb_ctz32 (uint32_t x) 430 ecb_ctz32 (uint32_t x)
419 { 431 {
432#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
433 unsigned long r;
434 _BitScanForward (&r, x);
435 return (int)r;
436#else
420 int r = 0; 437 int r = 0;
421 438
422 x &= ~x + 1; /* this isolates the lowest bit */ 439 x &= ~x + 1; /* this isolates the lowest bit */
423 440
424#if ECB_branchless_on_i386 441#if ECB_branchless_on_i386
… …
434 if (x & 0xff00ff00) r += 8; 451 if (x & 0xff00ff00) r += 8;
435 if (x & 0xffff0000) r += 16; 452 if (x & 0xffff0000) r += 16;
436#endif 453#endif
437 454
438 return r; 455 return r;
456#endif
439 } 457 }
440 458
441 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); 459 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
442 ecb_function_ ecb_const int 460 ecb_function_ ecb_const int
443 ecb_ctz64 (uint64_t x) 461 ecb_ctz64 (uint64_t x)
444 { 462 {
463#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
464 unsigned long r;
465 _BitScanForward64 (&r, x);
466 return (int)r;
467#else
445 int shift = x & 0xffffffffU ? 0 : 32; 468 int shift = x & 0xffffffff ? 0 : 32;
446 return ecb_ctz32 (x >> shift) + shift; 469 return ecb_ctz32 (x >> shift) + shift;
470#endif
447 } 471 }
448 472
449 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); 473 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
450 ecb_function_ ecb_const int 474 ecb_function_ ecb_const int
451 ecb_popcount32 (uint32_t x) 475 ecb_popcount32 (uint32_t x)
… …
459 } 483 }
460 484
461 ecb_function_ ecb_const int ecb_ld32 (uint32_t x); 485 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
462 ecb_function_ ecb_const int ecb_ld32 (uint32_t x) 486 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
463 { 487 {
488#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
489 unsigned long r;
490 _BitScanReverse (&r, x);
491 return (int)r;
492#else
464 int r = 0; 493 int r = 0;
465 494
466 if (x >> 16) { x >>= 16; r += 16; } 495 if (x >> 16) { x >>= 16; r += 16; }
467 if (x >> 8) { x >>= 8; r += 8; } 496 if (x >> 8) { x >>= 8; r += 8; }
468 if (x >> 4) { x >>= 4; r += 4; } 497 if (x >> 4) { x >>= 4; r += 4; }
469 if (x >> 2) { x >>= 2; r += 2; } 498 if (x >> 2) { x >>= 2; r += 2; }
470 if (x >> 1) { r += 1; } 499 if (x >> 1) { r += 1; }
471 500
472 return r; 501 return r;
502#endif
473 } 503 }
474 504
475 ecb_function_ ecb_const int ecb_ld64 (uint64_t x); 505 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
476 ecb_function_ ecb_const int ecb_ld64 (uint64_t x) 506 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
477 { 507 {
508#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
509 unsigned long r;
510 _BitScanReverse64 (&r, x);
511 return (int)r;
512#else
478 int r = 0; 513 int r = 0;
479 514
480 if (x >> 32) { x >>= 32; r += 32; } 515 if (x >> 32) { x >>= 32; r += 32; }
481 516
482 return r + ecb_ld32 (x); 517 return r + ecb_ld32 (x);
518#endif
483 } 519 }
484#endif 520#endif
485 521
486ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); 522ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
487ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 523ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
… …
544ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 580ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
545ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 581ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
546ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 582ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
547 583
548#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 584#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
585 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
586 #define ecb_bswap16(x) __builtin_bswap16 (x)
587 #else
549 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 588 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
589 #endif
550 #define ecb_bswap32(x) __builtin_bswap32 (x) 590 #define ecb_bswap32(x) __builtin_bswap32 (x)
551 #define ecb_bswap64(x) __builtin_bswap64 (x) 591 #define ecb_bswap64(x) __builtin_bswap64 (x)
592#elif _MSC_VER
593 #include <stdlib.h>
594 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
595 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
596 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
552#else 597#else
553 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); 598 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
554 ecb_function_ ecb_const uint16_t 599 ecb_function_ ecb_const uint16_t
555 ecb_bswap16 (uint16_t x) 600 ecb_bswap16 (uint16_t x)
556 { 601 {
… …
591 /* but less than using pointers, and always seems to */ 636 /* but less than using pointers, and always seems to */
592 /* successfully return a constant. */ 637 /* successfully return a constant. */
593 /* the reason why we have this horrible preprocessor mess */ 638 /* the reason why we have this horrible preprocessor mess */
594 /* is to avoid it in all cases, at least on common architectures */ 639 /* is to avoid it in all cases, at least on common architectures */
595 /* or when using a recent enough gcc version (>= 4.6) */ 640 /* or when using a recent enough gcc version (>= 4.6) */
596#if ((__i386 || __i386__) && !__VOS__) || _M_X86 || __amd64 || __amd64__ || _M_X64 641#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
597 return 0x44; 642 return 0x44;
598#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 643#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
599 return 0x44; 644 return 0x44;
600#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 645#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
601 return 0x11; 646 return 0x11;
… …
645 } 690 }
646#else 691#else
647 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 692 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
648#endif 693#endif
649 694
695ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
696ecb_function_ ecb_const uint32_t
697ecb_binary16_to_binary32 (uint32_t x)
698{
699 unsigned int s = (x & 0x8000) << (31 - 15);
700 int e = (x >> 10) & 0x001f;
701 unsigned int m = x & 0x03ff;
702
703 if (ecb_expect_false (e == 31))
704 /* infinity or NaN */
705 e = 255 - (127 - 15);
706 else if (ecb_expect_false (!e))
707 {
708 if (ecb_expect_true (!m))
709 /* zero, handled by code below by forcing e to 0 */
710 e = 0 - (127 - 15);
711 else
712 {
713 /* subnormal, renormalise */
714 unsigned int s = 10 - ecb_ld32 (m);
715
716 m = (m << s) & 0x3ff; /* mask implicit bit */
717 e -= s - 1;
718 }
719 }
720
721 /* e and m now are normalised, or zero, (or inf or nan) */
722 e += 127 - 15;
723
724 return s | (e << 23) | (m << (23 - 10));
725}
726
727ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
728ecb_function_ ecb_const uint16_t
729ecb_binary32_to_binary16 (uint32_t x)
730{
731 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
732 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
733 unsigned int m = x & 0x007fffff;
734
735 x &= 0x7fffffff;
736
737 /* if it's within range of binary16 normals, use fast path */
738 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
739 {
740 /* mantissa round-to-even */
741 m += 0x00000fff + ((m >> (23 - 10)) & 1);
742
743 /* handle overflow */
744 if (ecb_expect_false (m >= 0x00800000))
745 {
746 m >>= 1;
747 e += 1;
748 }
749
750 return s | (e << 10) | (m >> (23 - 10));
751 }
752
753 /* handle large numbers and infinity */
754 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
755 return s | 0x7c00;
756
757 /* handle zero, subnormals and small numbers */
758 if (ecb_expect_true (x < 0x38800000))
759 {
760 /* zero */
761 if (ecb_expect_true (!x))
762 return s;
763
764 /* handle subnormals */
765
766 /* too small, will be zero */
767 if (e < (14 - 24)) /* might not be sharp, but is good enough */
768 return s;
769
770 m |= 0x00800000; /* make implicit bit explicit */
771
772 /* very tricky - we need to round to the nearest e (+10) bit value */
773 {
774 unsigned int bits = 14 - e;
775 unsigned int half = (1 << (bits - 1)) - 1;
776 unsigned int even = (m >> bits) & 1;
777
778 /* if this overflows, we will end up with a normalised number */
779 m = (m + half + even) >> bits;
780 }
781
782 return s | m;
783 }
784
785 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
786 m >>= 13;
787
788 return s | 0x7c00 | m | !m;
789}
790
650/*******************************************************************************/ 791/*******************************************************************************/
651/* floating point stuff, can be disabled by defining ECB_NO_LIBM */ 792/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
652 793
653/* basically, everything uses "ieee pure-endian" floating point numbers */ 794/* basically, everything uses "ieee pure-endian" floating point numbers */
654/* the only noteworthy exception is ancient armle, which uses order 43218765 */ 795/* the only noteworthy exception is ancient armle, which uses order 43218765 */
655#if 0 \ 796#if 0 \
656 || __i386 || __i386__ \ 797 || __i386 || __i386__ \
657 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ 798 || ECB_GCC_AMD64 \
658 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ 799 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
659 || defined __s390__ || defined __s390x__ \ 800 || defined __s390__ || defined __s390x__ \
660 || defined __mips__ \ 801 || defined __mips__ \
661 || defined __alpha__ \ 802 || defined __alpha__ \
662 || defined __hppa__ \ 803 || defined __hppa__ \
663 || defined __ia64__ \ 804 || defined __ia64__ \
664 || defined __m68k__ \ 805 || defined __m68k__ \
665 || defined __m88k__ \ 806 || defined __m88k__ \
666 || defined __sh__ \ 807 || defined __sh__ \
667 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ 808 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
668 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 809 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
669 || defined __aarch64__ 810 || defined __aarch64__
670 #define ECB_STDFP 1 811 #define ECB_STDFP 1
671 #include <string.h> /* for memcpy */ 812 #include <string.h> /* for memcpy */
672#else 813#else
… …
690 #define ECB_NAN ECB_INFINITY 831 #define ECB_NAN ECB_INFINITY
691 #endif 832 #endif
692 833
693 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L 834 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
694 #define ecb_ldexpf(x,e) ldexpf ((x), (e)) 835 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
836 #define ecb_frexpf(x,e) frexpf ((x), (e))
695 #else 837 #else
696 #define ecb_ldexpf(x,e) (float) ldexp ((x), (e)) 838 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
839 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
697 #endif 840 #endif
698
699 /* converts an ieee half/binary16 to a float */
700 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
701 ecb_function_ ecb_const float
702 ecb_binary16_to_float (uint16_t x)
703 {
704 int e = (x >> 10) & 0x1f;
705 int m = x & 0x3ff;
706 float r;
707
708 if (!e ) r = ecb_ldexpf (m , -24);
709 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
710 else if (m ) r = ECB_NAN;
711 else r = ECB_INFINITY;
712
713 return x & 0x8000 ? -r : r;
714 }
715 841
716 /* convert a float to ieee single/binary32 */ 842 /* convert a float to ieee single/binary32 */
717 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); 843 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
718 ecb_function_ ecb_const uint32_t 844 ecb_function_ ecb_const uint32_t
719 ecb_float_to_binary32 (float x) 845 ecb_float_to_binary32 (float x)
… …
730 if (x == 0e0f ) return 0x00000000U; 856 if (x == 0e0f ) return 0x00000000U;
731 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 857 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
732 if (x < -3.40282346638528860e+38f) return 0xff800000U; 858 if (x < -3.40282346638528860e+38f) return 0xff800000U;
733 if (x != x ) return 0x7fbfffffU; 859 if (x != x ) return 0x7fbfffffU;
734 860
735 m = frexpf (x, &e) * 0x1000000U; 861 m = ecb_frexpf (x, &e) * 0x1000000U;
736 862
737 r = m & 0x80000000U; 863 r = m & 0x80000000U;
738 864
739 if (r) 865 if (r)
740 m = -m; 866 m = -m;
… …
851 #endif 977 #endif
852 978
853 return r; 979 return r;
854 } 980 }
855 981
856#endif 982 /* convert a float to ieee half/binary16 */
983 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
984 ecb_function_ ecb_const uint16_t
985 ecb_float_to_binary16 (float x)
986 {
987 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
988 }
857 989
858#endif 990 /* convert an ieee half/binary16 to float */
991 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
992 ecb_function_ ecb_const float
993 ecb_binary16_to_float (uint16_t x)
994 {
995 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
996 }
859 997
998#endif
999
1000#endif
1001

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