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

Comparing libecb/ecb.h (file contents):
Revision 1.14 by root, Thu May 26 18:26:59 2011 UTC vs.
Revision 1.79 by root, Sat Feb 4 17:57:47 2012 UTC

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

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Comparing libecb/ecb.h (file contents): Revision 1.14 by root, Thu May 26 18:26:59 2011 UTC vs. Revision 1.79 by root, Sat Feb 4 17:57:47 2012 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.14 by root, Thu May 26 18:26:59 2011 UTC vs.
Revision 1.79 by root, Sat Feb 4 17:57:47 2012 UTC