[ViewVC] Diff of: cvs/libecb/ecb.h

Comparing libecb/ecb.h (file contents):
Revision 1.32 by root, Wed Jun 1 01:02:31 2011 UTC vs.
Revision 1.86 by root, Thu Apr 12 04:09:25 2012 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2012 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:
28	*/	28	*/
29		29
30	#ifndef ECB_H	30	#ifndef ECB_H
31	#define ECB_H	31	#define ECB_H
32		32
		33	#ifdef _WIN32
		34	typedef signed char int8_t;
		35	typedef unsigned char uint8_t;
		36	typedef signed short int16_t;
		37	typedef unsigned short uint16_t;
		38	typedef signed int int32_t;
		39	typedef unsigned int uint32_t;
		40	#if __GNUC__
		41	typedef signed long long int64_t;
		42	typedef unsigned long long uint64_t;
		43	#else /* _MSC_VER \|\| __BORLANDC__ */
		44	typedef signed __int64 int64_t;
		45	typedef unsigned __int64 uint64_t;
		46	#endif
		47	#else
33	#include <inttypes.h>	48	#include <inttypes.h>
		49	#endif
34		50
35	/* many compilers define _GNUC_ to some versions but then only implement	51	/* many compilers define _GNUC_ to some versions but then only implement
36	* what their idiot authors think are the "more important" extensions,	52	* what their idiot authors think are the "more important" extensions,
37	* causing enourmous grief in return for some better fake benchmark numbers.	53	* causing enormous grief in return for some better fake benchmark numbers.
38	* or so.	54	* or so.
39	* we try to detect these and simply assume they are not gcc - if they have	55	* we try to detect these and simply assume they are not gcc - if they have
40	* an issue with that they should have done it right in the first place.	56	* an issue with that they should have done it right in the first place.
41	*/	57	*/
42	#ifndef ECB_GCC_VERSION	58	#ifndef ECB_GCC_VERSION
43	# if defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__llvm__)	59	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
44	# define ECB_GCC_VERSION(major,minor) 0	60	#define ECB_GCC_VERSION(major,minor) 0
45	# else	61	#else
46	# define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		63	#endif
47	# endif	64	#endif
		65
		66	/*****************************************************************************/
		67
		68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		69	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		70
		71	#if ECB_NO_THREADS
		72	# define ECB_NO_SMP 1
		73	#endif
		74
		75	#if ECB_NO_THREADS \|\| ECB_NO_SMP
		76	#define ECB_MEMORY_FENCE do { } while (0)
		77	#endif
		78
		79	#ifndef ECB_MEMORY_FENCE
		80	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		81	#if __i386 \|\| __i386__
		82	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		83	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		84	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		85	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		87	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		88	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		89	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		90	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		91	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
		92	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
		93	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		94	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		95	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
		96	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		97	#elif __sparc \|\| __sparc__
		98	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")
		99	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		100	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		101	#elif defined __s390__ \|\| defined __s390x__
		102	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		103	#elif defined __mips__
		104	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		105	#elif defined __alpha__
		106	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		107	#endif
48	#endif	108	#endif
		109	#endif
49		110
		111	#ifndef ECB_MEMORY_FENCE
		112	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
		113	#define ECB_MEMORY_FENCE __sync_synchronize ()
		114	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		115	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		116	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		117	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		118	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		119	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		120	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		121	#elif defined _WIN32
		122	#include <WinNT.h>
		123	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		124	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		125	#include <mbarrier.h>
		126	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		127	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		128	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		129	#elif __xlC__
		130	#define ECB_MEMORY_FENCE __sync ()
		131	#endif
		132	#endif
		133
		134	#ifndef ECB_MEMORY_FENCE
		135	#if !ECB_AVOID_PTHREADS
		136	/*
		137	* if you get undefined symbol references to pthread_mutex_lock,
		138	* or failure to find pthread.h, then you should implement
		139	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		140	* OR provide pthread.h and link against the posix thread library
		141	* of your system.
		142	*/
		143	#include <pthread.h>
		144	#define ECB_NEEDS_PTHREADS 1
		145	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		146
		147	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		148	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		149	#endif
		150	#endif
		151
		152	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		153	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		154	#endif
		155
		156	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		157	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		158	#endif
		159
		160	/*****************************************************************************/
		161
		162	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		163
50	#ifndef __cplusplus	164	#if __cplusplus
51	# if __STDC_VERSION__ >= 199901L	165	#define ecb_inline static inline
52	# define ECB_INLINE inline	166	#elif ECB_GCC_VERSION(2,5)
53	typedef _Bool ecb_bool;	167	#define ecb_inline static __inline__
		168	#elif ECB_C99
		169	#define ecb_inline static inline
54	# else	170	#else
55	# define ECB_INLINE inline /* yeah! */	171	#define ecb_inline static
		172	#endif
		173
		174	#if ECB_GCC_VERSION(3,3)
		175	#define ecb_restrict __restrict__
		176	#elif ECB_C99
		177	#define ecb_restrict restrict
		178	#else
		179	#define ecb_restrict
		180	#endif
		181
56	typedef int ecb_bool;	182	typedef int ecb_bool;
57	# endif
58	#else
59	# define ECB_INLINE inline
60	typedef bool ecb_bool;
61	#endif
62		183
63	#define ECB_CONCAT_(a, b) a ## b	184	#define ECB_CONCAT_(a, b) a ## b
64	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	185	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
65	#define ECB_STRINGIFY_(a) # a	186	#define ECB_STRINGIFY_(a) # a
66	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	187	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
67		188
68	#define ECB_HEADER_INLINE static ECB_INLINE	189	#define ecb_function_ ecb_inline
69		190
70	#if ECB_GCC_VERSION(3,1)	191	#if ECB_GCC_VERSION(3,1)
71	# define ecb_attribute(attrlist) __attribute__(attrlist)	192	#define ecb_attribute(attrlist) __attribute__(attrlist)
72	# define ecb_is_constant(expr) __builtin_constant_p (expr)	193	#define ecb_is_constant(expr) __builtin_constant_p (expr)
73	# define ecb_expect(expr,value) __builtin_expect ((expr),(value))	194	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
74	# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	195	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
75	#else	196	#else
76	# define ecb_attribute(attrlist)	197	#define ecb_attribute(attrlist)
77	# define ecb_is_constant(expr) 0	198	#define ecb_is_constant(expr) 0
78	# define ecb_expect(expr,value) (expr)	199	#define ecb_expect(expr,value) (expr)
79	# define ecb_prefetch(addr,rw,locality)	200	#define ecb_prefetch(addr,rw,locality)
80	#endif	201	#endif
81		202
82	/* no emulation for ecb_decltype */	203	/* no emulation for ecb_decltype */
83	#if ECB_GCC_VERSION(4,5)	204	#if ECB_GCC_VERSION(4,5)
84	# define ecb_decltype(x) __decltype(x)	205	#define ecb_decltype(x) __decltype(x)
85	#elif ECB_GCC_VERSION(3,0)	206	#elif ECB_GCC_VERSION(3,0)
86	# define ecb_decltype(x) typeof(x)	207	#define ecb_decltype(x) __typeof(x)
87	#endif	208	#endif
88		209
89	#define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */
90	#define ecb_noinline ecb_attribute ((__noinline__))	210	#define ecb_noinline ecb_attribute ((__noinline__))
91	#define ecb_noreturn ecb_attribute ((__noreturn__))	211	#define ecb_noreturn ecb_attribute ((__noreturn__))
92	#define ecb_unused ecb_attribute ((__unused__))	212	#define ecb_unused ecb_attribute ((__unused__))
93	#define ecb_const ecb_attribute ((__const__))	213	#define ecb_const ecb_attribute ((__const__))
94	#define ecb_pure ecb_attribute ((__pure__))	214	#define ecb_pure ecb_attribute ((__pure__))
		215
		216	#if ECB_GCC_VERSION(4,3)
		217	#define ecb_artificial ecb_attribute ((__artificial__))
95	#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */	218	#define ecb_hot ecb_attribute ((__hot__))
96	#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */	219	#define ecb_cold ecb_attribute ((__cold__))
		220	#else
		221	#define ecb_artificial
		222	#define ecb_hot
		223	#define ecb_cold
		224	#endif
97		225
98	/* put into if's if you are very sure that the expression */	226	/* put around conditional expressions if you are very sure that the */
99	/* is mostly true or mosty false. note that these return */	227	/* expression is mostly true or mostly false. note that these return */
100	/* booleans, not the expression. */	228	/* booleans, not the expression. */
101	#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)	229	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
		230	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		231	/* for compatibility to the rest of the world */
102	#define ecb_likely(expr) ecb_expect (!!(expr), 1)	232	#define ecb_likely(expr) ecb_expect_true (expr)
		233	#define ecb_unlikely(expr) ecb_expect_false (expr)
		234
		235	/* count trailing zero bits and count # of one bits */
		236	#if ECB_GCC_VERSION(3,4)
		237	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		238	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		239	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		240	#define ecb_ctz32(x) __builtin_ctz (x)
		241	#define ecb_ctz64(x) __builtin_ctzll (x)
		242	#define ecb_popcount32(x) __builtin_popcount (x)
		243	/* no popcountll */
		244	#else
		245	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		246	ecb_function_ int
		247	ecb_ctz32 (uint32_t x)
		248	{
		249	int r = 0;
		250
		251	x &= ~x + 1; /* this isolates the lowest bit */
		252
		253	#if ECB_branchless_on_i386
		254	r += !!(x & 0xaaaaaaaa) << 0;
		255	r += !!(x & 0xcccccccc) << 1;
		256	r += !!(x & 0xf0f0f0f0) << 2;
		257	r += !!(x & 0xff00ff00) << 3;
		258	r += !!(x & 0xffff0000) << 4;
		259	#else
		260	if (x & 0xaaaaaaaa) r += 1;
		261	if (x & 0xcccccccc) r += 2;
		262	if (x & 0xf0f0f0f0) r += 4;
		263	if (x & 0xff00ff00) r += 8;
		264	if (x & 0xffff0000) r += 16;
		265	#endif
		266
		267	return r;
		268	}
		269
		270	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		271	ecb_function_ int
		272	ecb_ctz64 (uint64_t x)
		273	{
		274	int shift = x & 0xffffffffU ? 0 : 32;
		275	return ecb_ctz32 (x >> shift) + shift;
		276	}
		277
		278	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		279	ecb_function_ int
		280	ecb_popcount32 (uint32_t x)
		281	{
		282	x -= (x >> 1) & 0x55555555;
		283	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		284	x = ((x >> 4) + x) & 0x0f0f0f0f;
		285	x *= 0x01010101;
		286
		287	return x >> 24;
		288	}
		289
		290	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		291	ecb_function_ int ecb_ld32 (uint32_t x)
		292	{
		293	int r = 0;
		294
		295	if (x >> 16) { x >>= 16; r += 16; }
		296	if (x >> 8) { x >>= 8; r += 8; }
		297	if (x >> 4) { x >>= 4; r += 4; }
		298	if (x >> 2) { x >>= 2; r += 2; }
		299	if (x >> 1) { r += 1; }
		300
		301	return r;
		302	}
		303
		304	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		305	ecb_function_ int ecb_ld64 (uint64_t x)
		306	{
		307	int r = 0;
		308
		309	if (x >> 32) { x >>= 32; r += 32; }
		310
		311	return r + ecb_ld32 (x);
		312	}
		313	#endif
		314
		315	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		316	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		317	{
		318	return ( (x * 0x0802U & 0x22110U)
		319	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		320	}
		321
		322	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		323	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		324	{
		325	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		326	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		327	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		328	x = ( x >> 8 ) \| ( x << 8);
		329
		330	return x;
		331	}
		332
		333	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		334	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		335	{
		336	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		337	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		338	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		339	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		340	x = ( x >> 16 ) \| ( x << 16);
		341
		342	return x;
		343	}
		344
		345	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		346	/* so for this version we are lazy */
		347	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		348	ecb_function_ int
		349	ecb_popcount64 (uint64_t x)
		350	{
		351	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		352	}
		353
		354	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		355	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		356	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		357	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		358	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		359	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		360	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		361	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		362
		363	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		364	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		365	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		366	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		367	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		368	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		369	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		370	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		371
		372	#if ECB_GCC_VERSION(4,3)
		373	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		374	#define ecb_bswap32(x) __builtin_bswap32 (x)
		375	#define ecb_bswap64(x) __builtin_bswap64 (x)
		376	#else
		377	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		378	ecb_function_ uint16_t
		379	ecb_bswap16 (uint16_t x)
		380	{
		381	return ecb_rotl16 (x, 8);
		382	}
		383
		384	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		385	ecb_function_ uint32_t
		386	ecb_bswap32 (uint32_t x)
		387	{
		388	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		389	}
		390
		391	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		392	ecb_function_ uint64_t
		393	ecb_bswap64 (uint64_t x)
		394	{
		395	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		396	}
		397	#endif
		398
		399	#if ECB_GCC_VERSION(4,5)
		400	#define ecb_unreachable() __builtin_unreachable ()
		401	#else
		402	/* this seems to work fine, but gcc always emits a warning for it :/ */
		403	ecb_inline void ecb_unreachable (void) ecb_noreturn;
		404	ecb_inline void ecb_unreachable (void) { }
		405	#endif
103		406
104	/* try to tell the compiler that some condition is definitely true */	407	/* try to tell the compiler that some condition is definitely true */
105	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	408	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
106		409
107	/* count trailing zero bits and count # of one bits */
108	#if ECB_GCC_VERSION(3,4)
109	#define ecb_ctz32(x) __builtin_ctz (x)
110	#define ecb_popcount32(x) __builtin_popcount (x)
111	#else
112	ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
113	ECB_HEADER_INLINE
114	ecb_ctz32 (uint32_t x)
115	{
116	int r = 0;
117
118	x &= -x; /* this isolates the lowest bit */
119
120	if (x & 0xaaaaaaaa) r += 1;
121	if (x & 0xcccccccc) r += 2;
122	if (x & 0xf0f0f0f0) r += 4;
123	if (x & 0xff00ff00) r += 8;
124	if (x & 0xffff0000) r += 16;
125
126	return r;
127	}
128
129	ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
130	ECB_HEADER_INLINE
131	ecb_popcount32 (uint32_t x)
132	{
133	x -= (x >> 1) & 0x55555555;
134	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
135	x = ((x >> 4) + x) & 0x0f0f0f0f;
136	x *= 0x01010101;
137
138	return x >> 24;
139	}
140	#endif
141
142	#if ECB_GCC_VERSION(4,3)
143	# define ecb_bswap32(x) __builtin_bswap32 (x)
144	# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
145	#else
146	ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
147	ECB_HEADER_INLINE uint32_t
148	ecb_bswap32 (uint32_t x)
149	{
150	return (x >> 24)
151	\| ((x >> 8) & 0x0000ff00)
152	\| ((x << 8) & 0x00ff0000)
153	\| (x << 24);
154	}
155
156	ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
157	ECB_HEADER_INLINE uint32_t
158	ecb_bswap16 (uint32_t x)
159	{
160	return ((x >> 8) & 0xff)
161	\| ((x << 8) & 0x00ff0000)
162	\| (x << 24);
163	}
164	#endif
165
166	#if ECB_GCC_VERSION(4,5)
167	# define ecb_unreachable() __builtin_unreachable ()
168	#else
169	/* this seems to work fine, but gcc always emits a warning for it :/ */
170	ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
171	ECB_HEADER_INLINE void ecb_unreachable (void) { }
172	#endif
173
174	ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;	410	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
175	ECB_HEADER_INLINE unsigned char	411	ecb_inline unsigned char
176	ecb_byteorder_helper (void)	412	ecb_byteorder_helper (void)
177	{	413	{
178	const uint32_t u = 0x11223344;	414	const uint32_t u = 0x11223344;
179	return (unsigned char )&u;	415	return (unsigned char )&u;
180	}	416	}
181		417
182	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;	418	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
183	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };	419	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
184	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;	420	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
185	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };	421	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
186		422
187	#if ECB_GCC_VERSION(3,0)	423	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
188	# define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	424	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
189	#else	425	#else
190	# define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	426	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		427	#endif
		428
		429	#if __cplusplus
		430	template<typename T>
		431	static inline T ecb_div_rd (T val, T div)
		432	{
		433	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		434	}
		435	template<typename T>
		436	static inline T ecb_div_ru (T val, T div)
		437	{
		438	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		439	}
		440	#else
		441	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		442	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
191	#endif	443	#endif
192		444
193	#if ecb_cplusplus_does_not_suck	445	#if ecb_cplusplus_does_not_suck
194	// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)	446	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
195	template<typename T, int N>	447	template<typename T, int N>
196	static inline int ecb_array_length (const T (&arr)[N])	448	static inline int ecb_array_length (const T (&arr)[N])
197	{	449	{
198	return N;	450	return N;
199	}	451	}
200	#else	452	#else
201	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	453	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
202	#endif	454	#endif
203		455
204	ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
205	ECB_INLINE uint32_t
206	ecb_rotr32 (uint32_t x, unsigned int count)
207	{
208	return (x << (32 - count)) \| (x >> count);
209	}
210
211	ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
212	ECB_INLINE uint32_t
213	ecb_rotl32 (uint32_t x, unsigned int count)
214	{
215	return (x >> (32 - count)) \| (x << count);
216	}
217
218	#endif	456	#endif
219		457

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Comparing libecb/ecb.h (file contents): Revision 1.32 by root, Wed Jun 1 01:02:31 2011 UTC vs. Revision 1.86 by root, Thu Apr 12 04:09:25 2012 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.32 by root, Wed Jun 1 01:02:31 2011 UTC vs.
Revision 1.86 by root, Thu Apr 12 04:09:25 2012 UTC