[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 1.96 by root, Wed May 30 16:56:06 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	/* 16 bits major, 16 bits minor */
		34	#define ECB_VERSION 0x00010001
		35
		36	#ifdef _WIN32
		37	typedef signed char int8_t;
		38	typedef unsigned char uint8_t;
		39	typedef signed short int16_t;
		40	typedef unsigned short uint16_t;
		41	typedef signed int int32_t;
		42	typedef unsigned int uint32_t;
		43	#if __GNUC__
		44	typedef signed long long int64_t;
		45	typedef unsigned long long uint64_t;
		46	#else /* _MSC_VER \|\| __BORLANDC__ */
		47	typedef signed __int64 int64_t;
		48	typedef unsigned __int64 uint64_t;
		49	#endif
		50	#ifdef _WIN64
		51	#define ECB_PTRSIZE 8
		52	typedef uint64_t uintptr_t;
		53	typedef int64_t intptr_t;
		54	#else
		55	#define ECB_PTRSIZE 4
		56	typedef uint32_t uintptr_t;
		57	typedef int32_t intptr_t;
		58	#endif
		59	typedef intptr_t ptrdiff_t;
		60	#else
33	#include <inttypes.h>	61	#include <inttypes.h>
		62	#if UINTMAX_MAX > 0xffffffffU
		63	#define ECB_PTRSIZE 8
		64	#else
		65	#define ECB_PTRSIZE 4
		66	#endif
		67	#endif
34		68
35	/* many compilers define _GNUC_ to some versions but then only implement	69	/* many compilers define _GNUC_ to some versions but then only implement
36	* what their idiot authors think are the "more important" extensions,	70	* what their idiot authors think are the "more important" extensions,
37	* causing enourmous grief for some better fake benchmark numbers or so.	71	* causing enormous grief in return for some better fake benchmark numbers.
		72	* or so.
38	* we try to detect these and simply assume they are not gcc - if they have	73	* 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.	74	* an issue with that they should have done it right in the first place.
40	*/	75	*/
41	#ifndef ECB_GCC_VERSION	76	#ifndef ECB_GCC_VERSION
42	# if defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__llvm__)	77	#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	78	#define ECB_GCC_VERSION(major,minor) 0
44	# else	79	#else
45	# define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	80	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		81	#endif
46	# endif	82	#endif
		83
		84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
		85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
		86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)
		87	#define ECB_CPP (__cplusplus+0)
		88	#define ECB_CPP11 (__cplusplus >= 201103L)
		89
		90	/*****************************************************************************/
		91
		92	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		93	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		94
		95	#if ECB_NO_THREADS
		96	#define ECB_NO_SMP 1
		97	#endif
		98
		99	#if ECB_NO_SMP
		100	#define ECB_MEMORY_FENCE do { } while (0)
		101	#endif
		102
		103	#ifndef ECB_MEMORY_FENCE
		104	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		105	#if __i386 \|\| __i386__
		106	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		107	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		108	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		109	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		110	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		111	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		112	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		113	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		114	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		115	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
		116	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
		117	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		118	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		119	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
		120	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		121	#elif __sparc \|\| __sparc__
		122	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
		123	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		124	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		125	#elif defined __s390__ \|\| defined __s390x__
		126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		127	#elif defined __mips__
		128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		129	#elif defined __alpha__
		130	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		131	#elif defined __hppa__
		132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		133	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		134	#elif defined __ia64__
		135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		136	#endif
47	#endif	137	#endif
		138	#endif
48		139
		140	#ifndef ECB_MEMORY_FENCE
		141	#if ECB_GCC_VERSION(4,7)
		142	/* see comment below about the C11 memory model. in short - avoid */
		143	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		144	#elif defined __clang && __has_feature (cxx_atomic)
		145	/* see above */
		146	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		147	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
		148	#define ECB_MEMORY_FENCE __sync_synchronize ()
		149	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		150	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		151	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		152	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		153	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		154	#elif defined _WIN32
		155	#include <WinNT.h>
		156	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		157	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		158	#include <mbarrier.h>
		159	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		160	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		161	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		162	#elif __xlC__
		163	#define ECB_MEMORY_FENCE __sync ()
		164	#endif
		165	#endif
		166
		167	#ifndef ECB_MEMORY_FENCE
		168	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		169	/* we assume that these memory fences work on all variables/all memory accesses, */
		170	/* not just C11 atomics and atomic accesses */
		171	#include <stdatomic.h>
		172	/* unfortunately, the C11 memory model seems to be very limited, and unable to express */
		173	/* simple barrier semantics. That means we need to take out thor's hammer. */
		174	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		175	#endif
		176	#endif
		177
		178	#ifndef ECB_MEMORY_FENCE
		179	#if !ECB_AVOID_PTHREADS
		180	/*
		181	* if you get undefined symbol references to pthread_mutex_lock,
		182	* or failure to find pthread.h, then you should implement
		183	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		184	* OR provide pthread.h and link against the posix thread library
		185	* of your system.
		186	*/
		187	#include <pthread.h>
		188	#define ECB_NEEDS_PTHREADS 1
		189	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		190
		191	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		192	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		193	#endif
		194	#endif
		195
		196	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		197	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		198	#endif
		199
		200	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		201	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		202	#endif
		203
		204	/*****************************************************************************/
		205
49	#ifndef __cplusplus	206	#if __cplusplus
50	# if __STDC_VERSION__ >= 199901L	207	#define ecb_inline static inline
51	# define ECB_INLINE inline	208	#elif ECB_GCC_VERSION(2,5)
52	typedef _Bool ecb_bool;	209	#define ecb_inline static __inline__
		210	#elif ECB_C99
		211	#define ecb_inline static inline
53	# else	212	#else
54	# define ECB_INLINE inline /* yeah! */	213	#define ecb_inline static
		214	#endif
		215
		216	#if ECB_GCC_VERSION(3,3)
		217	#define ecb_restrict __restrict__
		218	#elif ECB_C99
		219	#define ecb_restrict restrict
		220	#else
		221	#define ecb_restrict
		222	#endif
		223
55	typedef int ecb_bool;	224	typedef int ecb_bool;
56	# endif
57	#endif
58		225
59	#define ECB_CONCAT_(a, b) a ## b	226	#define ECB_CONCAT_(a, b) a ## b
60	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	227	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
61	#define ECB_STRINGIFY_(a) # a	228	#define ECB_STRINGIFY_(a) # a
62	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	229	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
63		230
64	#define ECB_HEADER_INLINE static ECB_INLINE	231	#define ecb_function_ ecb_inline
65		232
66	#if ECB_GCC_VERSION(3,1)	233	#if ECB_GCC_VERSION(3,1)
67	# define ecb_attribute(attrlist) __attribute__(attrlist)	234	#define ecb_attribute(attrlist) __attribute__(attrlist)
68	# define ecb_is_constant(c) __builtin_constant_p (c)	235	#define ecb_is_constant(expr) __builtin_constant_p (expr)
69	# define ecb_expect(expr,value) __builtin_expect ((expr),(value))	236	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
70	# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	237	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
71	#else	238	#else
72	# define ecb_attribute(attrlist)	239	#define ecb_attribute(attrlist)
73	# define ecb_is_constant(c) 0	240	#define ecb_is_constant(expr) 0
74	# define ecb_expect(expr,value) (expr)	241	#define ecb_expect(expr,value) (expr)
75	# define ecb_prefetch(addr,rw,locality)	242	#define ecb_prefetch(addr,rw,locality)
76	#endif	243	#endif
77		244
78	/* no emulation for ecb_decltype */	245	/* no emulation for ecb_decltype */
79	#if ECB_GCC_VERSION(4,5)	246	#if ECB_GCC_VERSION(4,5)
80	# define ecb_decltype(x) __decltype(x)	247	#define ecb_decltype(x) __decltype(x)
81	#elif ECB_GCC_VERSION(3,0)	248	#elif ECB_GCC_VERSION(3,0)
82	# define ecb_decltype(x) typeof(x)	249	#define ecb_decltype(x) __typeof(x)
83	#endif	250	#endif
84		251
85	#define ecb_noinline ecb_attribute ((noinline))	252	#define ecb_noinline ecb_attribute ((__noinline__))
86	#define ecb_noreturn ecb_attribute ((noreturn))
87	#define ecb_unused ecb_attribute ((unused))	253	#define ecb_unused ecb_attribute ((__unused__))
88	#define ecb_const ecb_attribute ((const))	254	#define ecb_const ecb_attribute ((__const__))
89	#define ecb_pure ecb_attribute ((pure))	255	#define ecb_pure ecb_attribute ((__pure__))
		256
		257	#if ECB_C11
		258	#define ecb_noreturn _Noreturn
		259	#else
		260	#define ecb_noreturn ecb_attribute ((__noreturn__))
		261	#endif
		262
		263	#if ECB_GCC_VERSION(4,3)
		264	#define ecb_artificial ecb_attribute ((__artificial__))
90	#define ecb_hot ecb_attribute ((hot)) /* 4.3 */	265	#define ecb_hot ecb_attribute ((__hot__))
91	#define ecb_cold ecb_attribute ((cold)) /* 4.3 */	266	#define ecb_cold ecb_attribute ((__cold__))
		267	#else
		268	#define ecb_artificial
		269	#define ecb_hot
		270	#define ecb_cold
		271	#endif
92		272
93	/* put into ifs if you are very sure that the expression */	273	/* put around conditional expressions if you are very sure that the */
94	/* is mostly true or mosty false. note that these return */	274	/* expression is mostly true or mostly false. note that these return */
95	/* booleans, not the expression. */	275	/* booleans, not the expression. */
96	#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)	276	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
		277	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		278	/* for compatibility to the rest of the world */
97	#define ecb_likely(expr) ecb_expect (!!(expr), 1)	279	#define ecb_likely(expr) ecb_expect_true (expr)
		280	#define ecb_unlikely(expr) ecb_expect_false (expr)
		281
		282	/* count trailing zero bits and count # of one bits */
		283	#if ECB_GCC_VERSION(3,4)
		284	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		285	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		286	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		287	#define ecb_ctz32(x) __builtin_ctz (x)
		288	#define ecb_ctz64(x) __builtin_ctzll (x)
		289	#define ecb_popcount32(x) __builtin_popcount (x)
		290	/* no popcountll */
		291	#else
		292	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		293	ecb_function_ int
		294	ecb_ctz32 (uint32_t x)
		295	{
		296	int r = 0;
		297
		298	x &= ~x + 1; /* this isolates the lowest bit */
		299
		300	#if ECB_branchless_on_i386
		301	r += !!(x & 0xaaaaaaaa) << 0;
		302	r += !!(x & 0xcccccccc) << 1;
		303	r += !!(x & 0xf0f0f0f0) << 2;
		304	r += !!(x & 0xff00ff00) << 3;
		305	r += !!(x & 0xffff0000) << 4;
		306	#else
		307	if (x & 0xaaaaaaaa) r += 1;
		308	if (x & 0xcccccccc) r += 2;
		309	if (x & 0xf0f0f0f0) r += 4;
		310	if (x & 0xff00ff00) r += 8;
		311	if (x & 0xffff0000) r += 16;
		312	#endif
		313
		314	return r;
		315	}
		316
		317	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		318	ecb_function_ int
		319	ecb_ctz64 (uint64_t x)
		320	{
		321	int shift = x & 0xffffffffU ? 0 : 32;
		322	return ecb_ctz32 (x >> shift) + shift;
		323	}
		324
		325	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		326	ecb_function_ int
		327	ecb_popcount32 (uint32_t x)
		328	{
		329	x -= (x >> 1) & 0x55555555;
		330	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		331	x = ((x >> 4) + x) & 0x0f0f0f0f;
		332	x *= 0x01010101;
		333
		334	return x >> 24;
		335	}
		336
		337	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		338	ecb_function_ int ecb_ld32 (uint32_t x)
		339	{
		340	int r = 0;
		341
		342	if (x >> 16) { x >>= 16; r += 16; }
		343	if (x >> 8) { x >>= 8; r += 8; }
		344	if (x >> 4) { x >>= 4; r += 4; }
		345	if (x >> 2) { x >>= 2; r += 2; }
		346	if (x >> 1) { r += 1; }
		347
		348	return r;
		349	}
		350
		351	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		352	ecb_function_ int ecb_ld64 (uint64_t x)
		353	{
		354	int r = 0;
		355
		356	if (x >> 32) { x >>= 32; r += 32; }
		357
		358	return r + ecb_ld32 (x);
		359	}
		360	#endif
		361
		362	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
		363	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		364	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
		365	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		366
		367	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		368	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		369	{
		370	return ( (x * 0x0802U & 0x22110U)
		371	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		372	}
		373
		374	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		375	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		376	{
		377	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		378	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		379	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		380	x = ( x >> 8 ) \| ( x << 8);
		381
		382	return x;
		383	}
		384
		385	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		386	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		387	{
		388	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		389	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		390	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		391	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		392	x = ( x >> 16 ) \| ( x << 16);
		393
		394	return x;
		395	}
		396
		397	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		398	/* so for this version we are lazy */
		399	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		400	ecb_function_ int
		401	ecb_popcount64 (uint64_t x)
		402	{
		403	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		404	}
		405
		406	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		407	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		408	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		409	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		410	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		411	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		412	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		413	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		414
		415	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		416	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		417	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		418	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		419	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		420	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		421	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		422	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		423
		424	#if ECB_GCC_VERSION(4,3)
		425	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		426	#define ecb_bswap32(x) __builtin_bswap32 (x)
		427	#define ecb_bswap64(x) __builtin_bswap64 (x)
		428	#else
		429	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		430	ecb_function_ uint16_t
		431	ecb_bswap16 (uint16_t x)
		432	{
		433	return ecb_rotl16 (x, 8);
		434	}
		435
		436	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		437	ecb_function_ uint32_t
		438	ecb_bswap32 (uint32_t x)
		439	{
		440	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		441	}
		442
		443	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		444	ecb_function_ uint64_t
		445	ecb_bswap64 (uint64_t x)
		446	{
		447	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		448	}
		449	#endif
		450
		451	#if ECB_GCC_VERSION(4,5)
		452	#define ecb_unreachable() __builtin_unreachable ()
		453	#else
		454	/* this seems to work fine, but gcc always emits a warning for it :/ */
		455	ecb_inline void ecb_unreachable (void) ecb_noreturn;
		456	ecb_inline void ecb_unreachable (void) { }
		457	#endif
98		458
99	/* try to tell the compiler that some condition is definitely true */	459	/* try to tell the compiler that some condition is definitely true */
100	#define ecb_assume(cond) do { if (!(cond)) unreachable (); } while (0)	460	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
101		461
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;	462	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
160		463	ecb_inline unsigned char
161	ECB_HEADER_INLINE unsigned char
162	ecb_byteorder_helper ()	464	ecb_byteorder_helper (void)
163	{	465	{
164	const uint32_t u = 0x11223344;	466	const uint32_t u = 0x11223344;
165	return (unsigned char )&u;	467	return (unsigned char )&u;
166	}	468	}
167		469
168	ECB_HEADER_INLINE ecb_bool ecb_big_endian () ecb_const;	470	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
169	ECB_HEADER_INLINE ecb_bool ecb_big_endian () { return ecb_byteorder_helper () == 0x11; };	471	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
170	ECB_HEADER_INLINE ecb_bool ecb_little_endian () ecb_const;	472	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
171	ECB_HEADER_INLINE ecb_bool ecb_little_endian () { return ecb_byteorder_helper () == 0x44; };	473	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
		474
		475	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		476	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		477	#else
		478	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		479	#endif
		480
		481	#if __cplusplus
		482	template<typename T>
		483	static inline T ecb_div_rd (T val, T div)
		484	{
		485	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		486	}
		487	template<typename T>
		488	static inline T ecb_div_ru (T val, T div)
		489	{
		490	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		491	}
		492	#else
		493	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		494	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		495	#endif
172		496
173	#if ecb_cplusplus_does_not_suck	497	#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)	498	/* 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>	499	template<typename T, int N>
176	static inline int ecb_array_length (const T (&arr)[N])	500	static inline int ecb_array_length (const T (&arr)[N])
177	{	501	{
178	return N;	502	return N;
179	}	503	}
180	#else	504	#else
181	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	505	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
182	#endif	506	#endif
183		507
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	508	#endif
199		509

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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 1.96 by root, Wed May 30 16:56:06 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 1.96 by root, Wed May 30 16:56:06 2012 UTC