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

Comparing libecb/ecb.h (file contents):
Revision 1.29 by root, Mon May 30 16:22:55 2011 UTC vs.
Revision 1.91 by root, Tue May 29 14:30:44 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	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 in return for some better fake benchmark numbers.	71	* causing enormous grief in return for some better fake benchmark numbers.
38	* or so.	72	* or so.
39	* 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
40	* 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.
41	*/	75	*/
42	#ifndef ECB_GCC_VERSION	76	#ifndef ECB_GCC_VERSION
43	# 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__
44	# define ECB_GCC_VERSION(major,minor) 0	78	#define ECB_GCC_VERSION(major,minor) 0
45	# else	79	#else
46	# 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
47	# 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_CPP98 (__cplusplus >= 199711L)
		89	#define ECB_CPP11 (__cplusplus >= 201103L)
		90
		91	/*****************************************************************************/
		92
		93	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		94	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		95
		96	#if ECB_NO_THREADS
		97	# define ECB_NO_SMP 1
		98	#endif
		99
		100	#if ECB_NO_THREADS \|\| ECB_NO_SMP
		101	#define ECB_MEMORY_FENCE do { } while (0)
		102	#endif
		103
		104	#ifndef ECB_MEMORY_FENCE
		105	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		106	/* we assume that these memory fences work on all variables/all memory accesses, */
		107	/* not just C11 atomics and atomic accesses */
		108	#include <stdatomic.h>
		109	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_acq_rel)
		110	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		111	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
48	#endif	112	#endif
		113	#endif
49		114
		115	#ifndef ECB_MEMORY_FENCE
		116	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		117	#if __i386 \|\| __i386__
		118	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		119	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		120	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		121	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		122	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		123	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		124	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		125	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		127	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
		128	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
		129	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		130	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		131	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
		132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		133	#elif __sparc \|\| __sparc__
		134	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")
		135	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		136	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		137	#elif defined __s390__ \|\| defined __s390x__
		138	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		139	#elif defined __mips__
		140	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		141	#elif defined __alpha__
		142	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		143	#endif
		144	#endif
		145	#endif
		146
		147	#ifndef ECB_MEMORY_FENCE
		148	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
		149	#define ECB_MEMORY_FENCE __sync_synchronize ()
		150	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		151	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		152	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		153	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		154	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		155	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		156	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		157	#elif defined _WIN32
		158	#include <WinNT.h>
		159	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		160	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		161	#include <mbarrier.h>
		162	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		163	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		164	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		165	#elif __xlC__
		166	#define ECB_MEMORY_FENCE __sync ()
		167	#endif
		168	#endif
		169
		170	#ifndef ECB_MEMORY_FENCE
		171	#if !ECB_AVOID_PTHREADS
		172	/*
		173	* if you get undefined symbol references to pthread_mutex_lock,
		174	* or failure to find pthread.h, then you should implement
		175	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		176	* OR provide pthread.h and link against the posix thread library
		177	* of your system.
		178	*/
		179	#include <pthread.h>
		180	#define ECB_NEEDS_PTHREADS 1
		181	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		182
		183	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		184	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		185	#endif
		186	#endif
		187
		188	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		189	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		190	#endif
		191
		192	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		193	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		194	#endif
		195
		196	/*****************************************************************************/
		197
50	#ifndef __cplusplus	198	#if __cplusplus
51	# if __STDC_VERSION__ >= 199901L	199	#define ecb_inline static inline
52	# define ECB_INLINE inline	200	#elif ECB_GCC_VERSION(2,5)
53	typedef _Bool ecb_bool;	201	#define ecb_inline static __inline__
		202	#elif ECB_C99
		203	#define ecb_inline static inline
54	# else	204	#else
55	# define ECB_INLINE inline /* yeah! */	205	#define ecb_inline static
		206	#endif
		207
		208	#if ECB_GCC_VERSION(3,3)
		209	#define ecb_restrict __restrict__
		210	#elif ECB_C99
		211	#define ecb_restrict restrict
		212	#else
		213	#define ecb_restrict
		214	#endif
		215
56	typedef int ecb_bool;	216	typedef int ecb_bool;
57	# endif
58	#else
59	# define ECB_INLINE inline
60	typedef bool ecb_bool;
61	#endif
62		217
63	#define ECB_CONCAT_(a, b) a ## b	218	#define ECB_CONCAT_(a, b) a ## b
64	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	219	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
65	#define ECB_STRINGIFY_(a) # a	220	#define ECB_STRINGIFY_(a) # a
66	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	221	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
67		222
68	#define ECB_HEADER_INLINE static ECB_INLINE	223	#define ecb_function_ ecb_inline
69		224
70	#if ECB_GCC_VERSION(3,1)	225	#if ECB_GCC_VERSION(3,1)
71	# define ecb_attribute(attrlist) __attribute__(attrlist)	226	#define ecb_attribute(attrlist) __attribute__(attrlist)
72	# define ecb_is_constant(expr) __builtin_constant_p (expr)	227	#define ecb_is_constant(expr) __builtin_constant_p (expr)
73	# define ecb_expect(expr,value) __builtin_expect ((expr),(value))	228	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
74	# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	229	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
75	#else	230	#else
76	# define ecb_attribute(attrlist)	231	#define ecb_attribute(attrlist)
77	# define ecb_is_constant(expr) 0	232	#define ecb_is_constant(expr) 0
78	# define ecb_expect(expr,value) (expr)	233	#define ecb_expect(expr,value) (expr)
79	# define ecb_prefetch(addr,rw,locality)	234	#define ecb_prefetch(addr,rw,locality)
80	#endif	235	#endif
81		236
82	/* no emulation for ecb_decltype */	237	/* no emulation for ecb_decltype */
83	#if ECB_GCC_VERSION(4,5)	238	#if ECB_GCC_VERSION(4,5)
84	# define ecb_decltype(x) __decltype(x)	239	#define ecb_decltype(x) __decltype(x)
85	#elif ECB_GCC_VERSION(3,0)	240	#elif ECB_GCC_VERSION(3,0)
86	# define ecb_decltype(x) typeof(x)	241	#define ecb_decltype(x) __typeof(x)
87	#endif	242	#endif
88		243
89	#define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */
90	#define ecb_noinline ecb_attribute ((__noinline__))	244	#define ecb_noinline ecb_attribute ((__noinline__))
91	#define ecb_noreturn ecb_attribute ((__noreturn__))
92	#define ecb_unused ecb_attribute ((__unused__))	245	#define ecb_unused ecb_attribute ((__unused__))
93	#define ecb_const ecb_attribute ((__const__))	246	#define ecb_const ecb_attribute ((__const__))
94	#define ecb_pure ecb_attribute ((__pure__))	247	#define ecb_pure ecb_attribute ((__pure__))
		248
		249	#if ECB_C11
		250	#define ecb_noreturn _Noreturn
		251	#else
		252	#define ecb_noreturn ecb_attribute ((__noreturn__))
		253	#endif
		254
		255	#if ECB_GCC_VERSION(4,3)
		256	#define ecb_artificial ecb_attribute ((__artificial__))
95	#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */	257	#define ecb_hot ecb_attribute ((__hot__))
96	#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */	258	#define ecb_cold ecb_attribute ((__cold__))
		259	#else
		260	#define ecb_artificial
		261	#define ecb_hot
		262	#define ecb_cold
		263	#endif
97		264
98	/* put into if's if you are very sure that the expression */	265	/* put around conditional expressions if you are very sure that the */
99	/* is mostly true or mosty false. note that these return */	266	/* expression is mostly true or mostly false. note that these return */
100	/* booleans, not the expression. */	267	/* booleans, not the expression. */
101	#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)	268	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
		269	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		270	/* for compatibility to the rest of the world */
102	#define ecb_likely(expr) ecb_expect (!!(expr), 1)	271	#define ecb_likely(expr) ecb_expect_true (expr)
		272	#define ecb_unlikely(expr) ecb_expect_false (expr)
		273
		274	/* count trailing zero bits and count # of one bits */
		275	#if ECB_GCC_VERSION(3,4)
		276	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		277	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		278	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		279	#define ecb_ctz32(x) __builtin_ctz (x)
		280	#define ecb_ctz64(x) __builtin_ctzll (x)
		281	#define ecb_popcount32(x) __builtin_popcount (x)
		282	/* no popcountll */
		283	#else
		284	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		285	ecb_function_ int
		286	ecb_ctz32 (uint32_t x)
		287	{
		288	int r = 0;
		289
		290	x &= ~x + 1; /* this isolates the lowest bit */
		291
		292	#if ECB_branchless_on_i386
		293	r += !!(x & 0xaaaaaaaa) << 0;
		294	r += !!(x & 0xcccccccc) << 1;
		295	r += !!(x & 0xf0f0f0f0) << 2;
		296	r += !!(x & 0xff00ff00) << 3;
		297	r += !!(x & 0xffff0000) << 4;
		298	#else
		299	if (x & 0xaaaaaaaa) r += 1;
		300	if (x & 0xcccccccc) r += 2;
		301	if (x & 0xf0f0f0f0) r += 4;
		302	if (x & 0xff00ff00) r += 8;
		303	if (x & 0xffff0000) r += 16;
		304	#endif
		305
		306	return r;
		307	}
		308
		309	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		310	ecb_function_ int
		311	ecb_ctz64 (uint64_t x)
		312	{
		313	int shift = x & 0xffffffffU ? 0 : 32;
		314	return ecb_ctz32 (x >> shift) + shift;
		315	}
		316
		317	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		318	ecb_function_ int
		319	ecb_popcount32 (uint32_t x)
		320	{
		321	x -= (x >> 1) & 0x55555555;
		322	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		323	x = ((x >> 4) + x) & 0x0f0f0f0f;
		324	x *= 0x01010101;
		325
		326	return x >> 24;
		327	}
		328
		329	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		330	ecb_function_ int ecb_ld32 (uint32_t x)
		331	{
		332	int r = 0;
		333
		334	if (x >> 16) { x >>= 16; r += 16; }
		335	if (x >> 8) { x >>= 8; r += 8; }
		336	if (x >> 4) { x >>= 4; r += 4; }
		337	if (x >> 2) { x >>= 2; r += 2; }
		338	if (x >> 1) { r += 1; }
		339
		340	return r;
		341	}
		342
		343	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		344	ecb_function_ int ecb_ld64 (uint64_t x)
		345	{
		346	int r = 0;
		347
		348	if (x >> 32) { x >>= 32; r += 32; }
		349
		350	return r + ecb_ld32 (x);
		351	}
		352	#endif
		353
		354	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
		355	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		356	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
		357	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		358
		359	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		360	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		361	{
		362	return ( (x * 0x0802U & 0x22110U)
		363	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		364	}
		365
		366	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		367	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		368	{
		369	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		370	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		371	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		372	x = ( x >> 8 ) \| ( x << 8);
		373
		374	return x;
		375	}
		376
		377	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		378	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		379	{
		380	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		381	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		382	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		383	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		384	x = ( x >> 16 ) \| ( x << 16);
		385
		386	return x;
		387	}
		388
		389	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		390	/* so for this version we are lazy */
		391	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		392	ecb_function_ int
		393	ecb_popcount64 (uint64_t x)
		394	{
		395	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		396	}
		397
		398	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		399	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		400	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		401	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		402	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		403	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		404	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		405	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		406
		407	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		408	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		409	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		410	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		411	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		412	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		413	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		414	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		415
		416	#if ECB_GCC_VERSION(4,3)
		417	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		418	#define ecb_bswap32(x) __builtin_bswap32 (x)
		419	#define ecb_bswap64(x) __builtin_bswap64 (x)
		420	#else
		421	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		422	ecb_function_ uint16_t
		423	ecb_bswap16 (uint16_t x)
		424	{
		425	return ecb_rotl16 (x, 8);
		426	}
		427
		428	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		429	ecb_function_ uint32_t
		430	ecb_bswap32 (uint32_t x)
		431	{
		432	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		433	}
		434
		435	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		436	ecb_function_ uint64_t
		437	ecb_bswap64 (uint64_t x)
		438	{
		439	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		440	}
		441	#endif
		442
		443	#if ECB_GCC_VERSION(4,5)
		444	#define ecb_unreachable() __builtin_unreachable ()
		445	#else
		446	/* this seems to work fine, but gcc always emits a warning for it :/ */
		447	ecb_inline void ecb_unreachable (void) ecb_noreturn;
		448	ecb_inline void ecb_unreachable (void) { }
		449	#endif
103		450
104	/* try to tell the compiler that some condition is definitely true */	451	/* try to tell the compiler that some condition is definitely true */
105	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	452	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
106		453
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;	454	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
175	ECB_HEADER_INLINE unsigned char	455	ecb_inline unsigned char
176	ecb_byteorder_helper (void)	456	ecb_byteorder_helper (void)
177	{	457	{
178	const uint32_t u = 0x11223344;	458	const uint32_t u = 0x11223344;
179	return (unsigned char )&u;	459	return (unsigned char )&u;
180	}	460	}
181		461
182	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;	462	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; };	463	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;	464	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; };	465	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
186		466
		467	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		468	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		469	#else
187	#define ecb_mod(m,n) ((m) < 0 ? ((n) - (-(m) % (n))) : ((m) % (n)))	470	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		471	#endif
		472
		473	#if __cplusplus
		474	template<typename T>
		475	static inline T ecb_div_rd (T val, T div)
		476	{
		477	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		478	}
		479	template<typename T>
		480	static inline T ecb_div_ru (T val, T div)
		481	{
		482	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		483	}
		484	#else
		485	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		486	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		487	#endif
188		488
189	#if ecb_cplusplus_does_not_suck	489	#if ecb_cplusplus_does_not_suck
190	// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)	490	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
191	template<typename T, int N>	491	template<typename T, int N>
192	static inline int ecb_array_length (const T (&arr)[N])	492	static inline int ecb_array_length (const T (&arr)[N])
193	{	493	{
194	return N;	494	return N;
195	}	495	}
196	#else	496	#else
197	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	497	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
198	#endif	498	#endif
199		499
200	ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
201	ECB_INLINE uint32_t
202	ecb_rotr32 (uint32_t x, unsigned int count)
203	{
204	return (x << (32 - count)) \| (x >> count);
205	}
206
207	ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
208	ECB_INLINE uint32_t
209	ecb_rotl32 (uint32_t x, unsigned int count)
210	{
211	return (x >> (32 - count)) \| (x << count);
212	}
213
214	#endif	500	#endif
215		501

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Comparing libecb/ecb.h (file contents): Revision 1.29 by root, Mon May 30 16:22:55 2011 UTC vs. Revision 1.91 by root, Tue May 29 14:30:44 2012 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.29 by root, Mon May 30 16:22:55 2011 UTC vs.
Revision 1.91 by root, Tue May 29 14:30:44 2012 UTC