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Comparing libecb/ecb.h (file contents):
Revision 1.107 by root, Fri Jun 29 00:56:30 2012 UTC vs.
Revision 1.124 by root, Tue Dec 3 15:35:14 2013 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2013 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:
… …
29 29
30#ifndef ECB_H 30#ifndef ECB_H
31#define ECB_H 31#define ECB_H
32 32
33/* 16 bits major, 16 bits minor */ 33/* 16 bits major, 16 bits minor */
34#define ECB_VERSION 0x00010001 34#define ECB_VERSION 0x00010003
35 35
36#ifdef _WIN32 36#ifdef _WIN32
37 typedef signed char int8_t; 37 typedef signed char int8_t;
38 typedef unsigned char uint8_t; 38 typedef unsigned char uint8_t;
39 typedef signed short int16_t; 39 typedef signed short int16_t;
… …
60 #include <inttypes.h> 60 #include <inttypes.h>
61 #if UINTMAX_MAX > 0xffffffffU 61 #if UINTMAX_MAX > 0xffffffffU
62 #define ECB_PTRSIZE 8 62 #define ECB_PTRSIZE 8
63 #else 63 #else
64 #define ECB_PTRSIZE 4 64 #define ECB_PTRSIZE 4
65 #endif
66#endif
67
68/* work around x32 idiocy by defining proper macros */
69#if __x86_64 || _M_AMD64
70 #if _ILP32
71 #define ECB_AMD64_X32 1
72 #else
73 #define ECB_AMD64 1
65 #endif 74 #endif
66#endif 75#endif
67 76
68/* many compilers define _GNUC_ to some versions but then only implement 77/* many compilers define _GNUC_ to some versions but then only implement
69 * what their idiot authors think are the "more important" extensions, 78 * what their idiot authors think are the "more important" extensions,
… …
125 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 134 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
126 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
127 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 136 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
128 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 137 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
129 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 138 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
130 #elif __sparc || __sparc__ 139 #elif (__sparc || __sparc__) && !__sparcv8
131 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 140 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
132 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 141 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
133 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
134 #elif defined __s390__ || defined __s390x__ 143 #elif defined __s390__ || defined __s390x__
135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 144 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
136 #elif defined __mips__ 145 #elif defined __mips__
146 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
147 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
137 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 148 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
138 #elif defined __alpha__ 149 #elif defined __alpha__
139 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 150 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
140 #elif defined __hppa__ 151 #elif defined __hppa__
141 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") 152 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 153 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
143 #elif defined __ia64__ 154 #elif defined __ia64__
144 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") 155 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
156 #elif defined __m68k__
157 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
158 #elif defined __m88k__
159 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
160 #elif defined __sh__
161 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
145 #endif 162 #endif
146 #endif 163 #endif
147#endif 164#endif
148 165
149#ifndef ECB_MEMORY_FENCE 166#ifndef ECB_MEMORY_FENCE
150 #if ECB_GCC_VERSION(4,7) 167 #if ECB_GCC_VERSION(4,7)
151 /* see comment below (stdatomic.h) about the C11 memory model. */ 168 /* see comment below (stdatomic.h) about the C11 memory model. */
152 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 169 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
170
171 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
172 * without risking compile time errors with other compilers. We *could*
173 * define our own ecb_clang_has_feature, but I just can't be bothered to work
174 * around this shit time and again.
153 /*#elif defined __clang && __has_feature (cxx_atomic)*/ 175 * #elif defined __clang && __has_feature (cxx_atomic)
154 /* see comment below (stdatomic.h) about the C11 memory model. */ 176 * // see comment below (stdatomic.h) about the C11 memory model.
155 /*#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)*/ 177 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
178 */
179
156 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 180 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
157 #define ECB_MEMORY_FENCE __sync_synchronize () 181 #define ECB_MEMORY_FENCE __sync_synchronize ()
158 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 182 #elif _MSC_VER >= 1400 /* VC++ 2005 */
159 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 183 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
160 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 184 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
… …
475ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 499ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
476ecb_inline unsigned char 500ecb_inline unsigned char
477ecb_byteorder_helper (void) 501ecb_byteorder_helper (void)
478{ 502{
479 /* the union code still generates code under pressure in gcc, */ 503 /* the union code still generates code under pressure in gcc, */
480 /* but less than using pointers, and always seem to */ 504 /* but less than using pointers, and always seems to */
481 /* successfully return a constant. */ 505 /* successfully return a constant. */
482 /* the reason why we have this horrible preprocessor mess */ 506 /* the reason why we have this horrible preprocessor mess */
483 /* is to avoid it in all cases, at least on common architectures */ 507 /* is to avoid it in all cases, at least on common architectures */
484 /* and yes, gcc defines __BYTE_ORDER__, g++ does not */ 508 /* or when using a recent enough gcc version (>= 4.6) */
485#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 509#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
486 return 0x44; 510 return 0x44;
487#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 511#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
488 return 0x44; 512 return 0x44;
489#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 513#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
490 retrurn 0x11; 514 return 0x11;
491#else 515#else
492 union 516 union
493 { 517 {
494 uint32_t i; 518 uint32_t i;
495 uint8_t c; 519 uint8_t c;
… …
549 || defined __s390__ || defined __s390x__ \ 573 || defined __s390__ || defined __s390x__ \
550 || defined __mips__ \ 574 || defined __mips__ \
551 || defined __alpha__ \ 575 || defined __alpha__ \
552 || defined __hppa__ \ 576 || defined __hppa__ \
553 || defined __ia64__ \ 577 || defined __ia64__ \
578 || defined __m68k__ \
579 || defined __m88k__ \
580 || defined __sh__ \
554 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 581 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
555 #define ECB_STDFP 1 582 #define ECB_STDFP 1
556 #include <string.h> /* for memcpy */ 583 #include <string.h> /* for memcpy */
557#else 584#else
558 #define ECB_STDFP 0 585 #define ECB_STDFP 0
559#endif 586#endif
560 587
561#ifndef ECB_NO_LIBM 588#ifndef ECB_NO_LIBM
589
590 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
591
592 /* only the oldest of old doesn't have this one. solaris. */
593 #ifdef INFINITY
594 #define ECB_INFINITY INFINITY
595 #else
596 #define ECB_INFINITY HUGE_VAL
597 #endif
598
599 #ifdef NAN
600 #define ECB_NAN NAN
601 #else
602 #define ECB_NAN ECB_INFINITY
603 #endif
604
605 /* converts an ieee half/binary16 to a float */
606 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
607 ecb_function_ float
608 ecb_binary16_to_float (uint16_t x)
609 {
610 int e = (x >> 10) & 0x1f;
611 int m = x & 0x3ff;
612 float r;
613
614 if (!e ) r = ldexpf (m , -24);
615 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
616 else if (m ) r = ECB_NAN;
617 else r = ECB_INFINITY;
618
619 return x & 0x8000 ? -r : r;
620 }
562 621
563 /* convert a float to ieee single/binary32 */ 622 /* convert a float to ieee single/binary32 */
564 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; 623 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
565 ecb_function_ uint32_t 624 ecb_function_ uint32_t
566 ecb_float_to_binary32 (float x) 625 ecb_float_to_binary32 (float x)
… …
569 628
570 #if ECB_STDFP 629 #if ECB_STDFP
571 memcpy (&r, &x, 4); 630 memcpy (&r, &x, 4);
572 #else 631 #else
573 /* slow emulation, works for anything but -0 */ 632 /* slow emulation, works for anything but -0 */
574 ECB_EXTERN_C float frexpf (float v, int *e);
575 uint32_t m; 633 uint32_t m;
576 int e; 634 int e;
577 635
578 if (x == 0e0f ) return 0; 636 if (x == 0e0f ) return 0x00000000U;
579 if (x > +3.40282346638528860e+38f) return 0x7f800000U; 637 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
580 if (x < -3.40282346638528860e+38f) return 0xff800000U; 638 if (x < -3.40282346638528860e+38f) return 0xff800000U;
581 if (x != x ) return 0x7fbfffffU; 639 if (x != x ) return 0x7fbfffffU;
582 640
583 m = frexpf (x, &e) * 0x1000000U; 641 m = frexpf (x, &e) * 0x1000000U;
… …
585 r = m & 0x80000000U; 643 r = m & 0x80000000U;
586 644
587 if (r) 645 if (r)
588 m = -m; 646 m = -m;
589 647
590 if (e < -125) 648 if (e <= -126)
591 { 649 {
592 m &= 0xffffffU; 650 m &= 0xffffffU;
593 m >>= (-125 - e); 651 m >>= (-125 - e);
594 e = -126; 652 e = -126;
595 } 653 }
… …
610 668
611 #if ECB_STDFP 669 #if ECB_STDFP
612 memcpy (&r, &x, 4); 670 memcpy (&r, &x, 4);
613 #else 671 #else
614 /* emulation, only works for normals and subnormals and +0 */ 672 /* emulation, only works for normals and subnormals and +0 */
615 ECB_EXTERN_C float ldexpf (float x, int e);
616
617 int neg = x >> 31; 673 int neg = x >> 31;
618 int e = (x >> 23) & 0xffU; 674 int e = (x >> 23) & 0xffU;
619 675
620 x &= 0x7fffffU; 676 x &= 0x7fffffU;
621 677
… …
623 x |= 0x800000U; 679 x |= 0x800000U;
624 else 680 else
625 e = 1; 681 e = 1;
626 682
627 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ 683 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
628 r = ldexpf (x * (1.f / 0x1000000U), e - 126); 684 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
629 685
630 r = neg ? -r : r; 686 r = neg ? -r : r;
631 #endif 687 #endif
632 688
633 return r; 689 return r;
… …
642 698
643 #if ECB_STDFP 699 #if ECB_STDFP
644 memcpy (&r, &x, 8); 700 memcpy (&r, &x, 8);
645 #else 701 #else
646 /* slow emulation, works for anything but -0 */ 702 /* slow emulation, works for anything but -0 */
647 ECB_EXTERN_C double frexp (double v, int *e);
648 uint64_t m; 703 uint64_t m;
649 int e; 704 int e;
650 705
651 if (x == 0e0 ) return 0; 706 if (x == 0e0 ) return 0x0000000000000000U;
652 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; 707 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
653 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; 708 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
654 if (x != x ) return 0X7ff7ffffffffffffU; 709 if (x != x ) return 0X7ff7ffffffffffffU;
655 710
656 m = frexp (x, &e) * 0x20000000000000U; 711 m = frexp (x, &e) * 0x20000000000000U;
… …
658 r = m & 0x8000000000000000;; 713 r = m & 0x8000000000000000;;
659 714
660 if (r) 715 if (r)
661 m = -m; 716 m = -m;
662 717
663 if (e < -1021) 718 if (e <= -1022)
664 { 719 {
665 m &= 0x1fffffffffffffU; 720 m &= 0x1fffffffffffffU;
666 m >>= (-1021 - e); 721 m >>= (-1021 - e);
667 e = -1022; 722 e = -1022;
668 } 723 }
… …
683 738
684 #if ECB_STDFP 739 #if ECB_STDFP
685 memcpy (&r, &x, 8); 740 memcpy (&r, &x, 8);
686 #else 741 #else
687 /* emulation, only works for normals and subnormals and +0 */ 742 /* emulation, only works for normals and subnormals and +0 */
688 ECB_EXTERN_C double ldexp (double x, int e);
689
690 int neg = x >> 63; 743 int neg = x >> 63;
691 int e = (x >> 52) & 0x7ffU; 744 int e = (x >> 52) & 0x7ffU;
692 745
693 x &= 0xfffffffffffffU; 746 x &= 0xfffffffffffffU;
694 747
… …
696 x |= 0x10000000000000U; 749 x |= 0x10000000000000U;
697 else 750 else
698 e = 1; 751 e = 1;
699 752
700 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ 753 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
701 r = ldexp (x * (1. / 0x20000000000000U), e - 1022); 754 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
702 755
703 r = neg ? -r : r; 756 r = neg ? -r : r;
704 #endif 757 #endif
705 758
706 return r; 759 return r;

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