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

Comparing libecb/ecb.h (file contents):
Revision 1.26 by sf-exg, Thu May 26 21:35:39 2011 UTC vs.
Revision 1.90 by root, Tue May 29 14:09:49 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_C99 (__STDC_VERSION__ >= 199901L)
		85	#define ECB_C11 (__STDC_VERSION__ >= 201112L)
		86
		87	/*****************************************************************************/
		88
		89	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		90	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		91
		92	#if ECB_NO_THREADS
		93	# define ECB_NO_SMP 1
		94	#endif
		95
		96	#if ECB_NO_THREADS \|\| ECB_NO_SMP
		97	#define ECB_MEMORY_FENCE do { } while (0)
		98	#endif
		99
		100	#ifndef ECB_MEMORY_FENCE
		101	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		102	/* we assume that these memory fences work on all variables/all memory accesses, */
		103	/* not just C11 atomics and atomic accesses */
		104	#include <stdatomic.h>
		105	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_acq_rel)
		106	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		107	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
48	#endif	108	#endif
		109	#endif
49		110
		111	#ifndef ECB_MEMORY_FENCE
		112	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		113	#if __i386 \|\| __i386__
		114	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		115	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
		116	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
		117	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
		118	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		119	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		120	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
		121	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
		122	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		123	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
		124	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
		125	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		126	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
		127	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
		128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		129	#elif __sparc \|\| __sparc__
		130	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")
		131	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		132	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		133	#elif defined __s390__ \|\| defined __s390x__
		134	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		135	#elif defined __mips__
		136	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		137	#elif defined __alpha__
		138	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		139	#endif
		140	#endif
		141	#endif
		142
		143	#ifndef ECB_MEMORY_FENCE
		144	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
		145	#define ECB_MEMORY_FENCE __sync_synchronize ()
		146	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /
		147	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /
		148	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		149	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		150	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		151	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		152	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		153	#elif defined _WIN32
		154	#include <WinNT.h>
		155	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		156	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		157	#include <mbarrier.h>
		158	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		159	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		160	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		161	#elif __xlC__
		162	#define ECB_MEMORY_FENCE __sync ()
		163	#endif
		164	#endif
		165
		166	#ifndef ECB_MEMORY_FENCE
		167	#if !ECB_AVOID_PTHREADS
		168	/*
		169	* if you get undefined symbol references to pthread_mutex_lock,
		170	* or failure to find pthread.h, then you should implement
		171	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		172	* OR provide pthread.h and link against the posix thread library
		173	* of your system.
		174	*/
		175	#include <pthread.h>
		176	#define ECB_NEEDS_PTHREADS 1
		177	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		178
		179	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		180	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		181	#endif
		182	#endif
		183
		184	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		185	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		186	#endif
		187
		188	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		189	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		190	#endif
		191
		192	/*****************************************************************************/
		193
50	#ifndef __cplusplus	194	#if __cplusplus
51	# if __STDC_VERSION__ >= 199901L	195	#define ecb_inline static inline
52	# define ECB_INLINE inline	196	#elif ECB_GCC_VERSION(2,5)
53	typedef _Bool ecb_bool;	197	#define ecb_inline static __inline__
		198	#elif ECB_C99
		199	#define ecb_inline static inline
54	# else	200	#else
55	# define ECB_INLINE inline /* yeah! */	201	#define ecb_inline static
		202	#endif
		203
		204	#if ECB_GCC_VERSION(3,3)
		205	#define ecb_restrict __restrict__
		206	#elif ECB_C99
		207	#define ecb_restrict restrict
		208	#else
		209	#define ecb_restrict
		210	#endif
		211
56	typedef int ecb_bool;	212	typedef int ecb_bool;
57	# endif
58	#endif
59		213
60	#define ECB_CONCAT_(a, b) a ## b	214	#define ECB_CONCAT_(a, b) a ## b
61	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	215	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
62	#define ECB_STRINGIFY_(a) # a	216	#define ECB_STRINGIFY_(a) # a
63	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	217	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
64		218
65	#define ECB_HEADER_INLINE static ECB_INLINE	219	#define ecb_function_ ecb_inline
66		220
67	#if ECB_GCC_VERSION(3,1)	221	#if ECB_GCC_VERSION(3,1)
68	# define ecb_attribute(attrlist) __attribute__(attrlist)	222	#define ecb_attribute(attrlist) __attribute__(attrlist)
69	# define ecb_is_constant(expr) __builtin_constant_p (expr)	223	#define ecb_is_constant(expr) __builtin_constant_p (expr)
70	# define ecb_expect(expr,value) __builtin_expect ((expr),(value))	224	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
71	# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	225	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
72	#else	226	#else
73	# define ecb_attribute(attrlist)	227	#define ecb_attribute(attrlist)
74	# define ecb_is_constant(expr) 0	228	#define ecb_is_constant(expr) 0
75	# define ecb_expect(expr,value) (expr)	229	#define ecb_expect(expr,value) (expr)
76	# define ecb_prefetch(addr,rw,locality)	230	#define ecb_prefetch(addr,rw,locality)
77	#endif	231	#endif
78		232
79	/* no emulation for ecb_decltype */	233	/* no emulation for ecb_decltype */
80	#if ECB_GCC_VERSION(4,5)	234	#if ECB_GCC_VERSION(4,5)
81	# define ecb_decltype(x) __decltype(x)	235	#define ecb_decltype(x) __decltype(x)
82	#elif ECB_GCC_VERSION(3,0)	236	#elif ECB_GCC_VERSION(3,0)
83	# define ecb_decltype(x) typeof(x)	237	#define ecb_decltype(x) __typeof(x)
84	#endif	238	#endif
85		239
86	#define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */
87	#define ecb_noinline ecb_attribute ((__noinline__))	240	#define ecb_noinline ecb_attribute ((__noinline__))
88	#define ecb_noreturn ecb_attribute ((__noreturn__))
89	#define ecb_unused ecb_attribute ((__unused__))	241	#define ecb_unused ecb_attribute ((__unused__))
90	#define ecb_const ecb_attribute ((__const__))	242	#define ecb_const ecb_attribute ((__const__))
91	#define ecb_pure ecb_attribute ((__pure__))	243	#define ecb_pure ecb_attribute ((__pure__))
		244
		245	#if ECB_C11
		246	#define ecb_noreturn _Noreturn
		247	#else
		248	#define ecb_noreturn ecb_attribute ((__noreturn__))
		249	#endif
		250
		251	#if ECB_GCC_VERSION(4,3)
		252	#define ecb_artificial ecb_attribute ((__artificial__))
92	#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */	253	#define ecb_hot ecb_attribute ((__hot__))
93	#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */	254	#define ecb_cold ecb_attribute ((__cold__))
		255	#else
		256	#define ecb_artificial
		257	#define ecb_hot
		258	#define ecb_cold
		259	#endif
94		260
95	/* put into if's if you are very sure that the expression */	261	/* put around conditional expressions if you are very sure that the */
96	/* is mostly true or mosty false. note that these return */	262	/* expression is mostly true or mostly false. note that these return */
97	/* booleans, not the expression. */	263	/* booleans, not the expression. */
98	#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)	264	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
		265	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		266	/* for compatibility to the rest of the world */
99	#define ecb_likely(expr) ecb_expect (!!(expr), 1)	267	#define ecb_likely(expr) ecb_expect_true (expr)
		268	#define ecb_unlikely(expr) ecb_expect_false (expr)
		269
		270	/* count trailing zero bits and count # of one bits */
		271	#if ECB_GCC_VERSION(3,4)
		272	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		273	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		274	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
		275	#define ecb_ctz32(x) __builtin_ctz (x)
		276	#define ecb_ctz64(x) __builtin_ctzll (x)
		277	#define ecb_popcount32(x) __builtin_popcount (x)
		278	/* no popcountll */
		279	#else
		280	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
		281	ecb_function_ int
		282	ecb_ctz32 (uint32_t x)
		283	{
		284	int r = 0;
		285
		286	x &= ~x + 1; /* this isolates the lowest bit */
		287
		288	#if ECB_branchless_on_i386
		289	r += !!(x & 0xaaaaaaaa) << 0;
		290	r += !!(x & 0xcccccccc) << 1;
		291	r += !!(x & 0xf0f0f0f0) << 2;
		292	r += !!(x & 0xff00ff00) << 3;
		293	r += !!(x & 0xffff0000) << 4;
		294	#else
		295	if (x & 0xaaaaaaaa) r += 1;
		296	if (x & 0xcccccccc) r += 2;
		297	if (x & 0xf0f0f0f0) r += 4;
		298	if (x & 0xff00ff00) r += 8;
		299	if (x & 0xffff0000) r += 16;
		300	#endif
		301
		302	return r;
		303	}
		304
		305	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		306	ecb_function_ int
		307	ecb_ctz64 (uint64_t x)
		308	{
		309	int shift = x & 0xffffffffU ? 0 : 32;
		310	return ecb_ctz32 (x >> shift) + shift;
		311	}
		312
		313	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
		314	ecb_function_ int
		315	ecb_popcount32 (uint32_t x)
		316	{
		317	x -= (x >> 1) & 0x55555555;
		318	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		319	x = ((x >> 4) + x) & 0x0f0f0f0f;
		320	x *= 0x01010101;
		321
		322	return x >> 24;
		323	}
		324
		325	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		326	ecb_function_ int ecb_ld32 (uint32_t x)
		327	{
		328	int r = 0;
		329
		330	if (x >> 16) { x >>= 16; r += 16; }
		331	if (x >> 8) { x >>= 8; r += 8; }
		332	if (x >> 4) { x >>= 4; r += 4; }
		333	if (x >> 2) { x >>= 2; r += 2; }
		334	if (x >> 1) { r += 1; }
		335
		336	return r;
		337	}
		338
		339	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		340	ecb_function_ int ecb_ld64 (uint64_t x)
		341	{
		342	int r = 0;
		343
		344	if (x >> 32) { x >>= 32; r += 32; }
		345
		346	return r + ecb_ld32 (x);
		347	}
		348	#endif
		349
		350	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
		351	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		352	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
		353	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		354
		355	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		356	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		357	{
		358	return ( (x * 0x0802U & 0x22110U)
		359	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		360	}
		361
		362	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		363	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		364	{
		365	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		366	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		367	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		368	x = ( x >> 8 ) \| ( x << 8);
		369
		370	return x;
		371	}
		372
		373	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		374	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		375	{
		376	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		377	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		378	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		379	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		380	x = ( x >> 16 ) \| ( x << 16);
		381
		382	return x;
		383	}
		384
		385	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		386	/* so for this version we are lazy */
		387	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		388	ecb_function_ int
		389	ecb_popcount64 (uint64_t x)
		390	{
		391	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		392	}
		393
		394	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		395	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		396	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		397	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		398	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		399	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		400	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		401	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		402
		403	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		404	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		405	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		406	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		407	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		408	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		409	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		410	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
		411
		412	#if ECB_GCC_VERSION(4,3)
		413	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		414	#define ecb_bswap32(x) __builtin_bswap32 (x)
		415	#define ecb_bswap64(x) __builtin_bswap64 (x)
		416	#else
		417	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		418	ecb_function_ uint16_t
		419	ecb_bswap16 (uint16_t x)
		420	{
		421	return ecb_rotl16 (x, 8);
		422	}
		423
		424	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
		425	ecb_function_ uint32_t
		426	ecb_bswap32 (uint32_t x)
		427	{
		428	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
		429	}
		430
		431	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
		432	ecb_function_ uint64_t
		433	ecb_bswap64 (uint64_t x)
		434	{
		435	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
		436	}
		437	#endif
		438
		439	#if ECB_GCC_VERSION(4,5)
		440	#define ecb_unreachable() __builtin_unreachable ()
		441	#else
		442	/* this seems to work fine, but gcc always emits a warning for it :/ */
		443	ecb_inline void ecb_unreachable (void) ecb_noreturn;
		444	ecb_inline void ecb_unreachable (void) { }
		445	#endif
100		446
101	/* try to tell the compiler that some condition is definitely true */	447	/* try to tell the compiler that some condition is definitely true */
102	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	448	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
103		449
104	/* count trailing zero bits and count # of one bits */
105	#if ECB_GCC_VERSION(3,4)
106	#define ecb_ctz32(x) __builtin_ctz (x)
107	#define ecb_popcount32(x) __builtin_popcount (x)
108	#else
109	ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
110	ECB_HEADER_INLINE
111	ecb_ctz32 (uint32_t x)
112	{
113	int r = 0;
114
115	x &= -x; /* this isolates the lowest bit */
116
117	if (x & 0xaaaaaaaa) r += 1;
118	if (x & 0xcccccccc) r += 2;
119	if (x & 0xf0f0f0f0) r += 4;
120	if (x & 0xff00ff00) r += 8;
121	if (x & 0xffff0000) r += 16;
122
123	return r;
124	}
125
126	ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
127	ECB_HEADER_INLINE
128	ecb_popcount32 (uint32_t x)
129	{
130	x -= (x >> 1) & 0x55555555;
131	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
132	x = ((x >> 4) + x) & 0x0f0f0f0f;
133	x *= 0x01010101;
134
135	return x >> 24;
136	}
137	#endif
138
139	#if ECB_GCC_VERSION(4,3)
140	# define ecb_bswap32(x) __builtin_bswap32 (x)
141	# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
142	#else
143	ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
144	ECB_HEADER_INLINE uint32_t
145	ecb_bswap32 (uint32_t x)
146	{
147	return (x >> 24)
148	\| ((x >> 8) & 0x0000ff00)
149	\| ((x << 8) & 0x00ff0000)
150	\| (x << 24);
151	}
152
153	ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
154	ECB_HEADER_INLINE uint32_t
155	ecb_bswap16 (uint32_t x)
156	{
157	return ((x >> 8) & 0xff)
158	\| ((x << 8) & 0x00ff0000)
159	\| (x << 24);
160	}
161	#endif
162
163	#if ECB_GCC_VERSION(4,5)
164	# define ecb_unreachable() __builtin_unreachable ()
165	#else
166	/* this seems to work fine, but gcc always emits a warning for it :/ */
167	ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
168	ECB_HEADER_INLINE void ecb_unreachable (void) { }
169	#endif
170
171	ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;	450	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
172	ECB_HEADER_INLINE unsigned char	451	ecb_inline unsigned char
173	ecb_byteorder_helper (void)	452	ecb_byteorder_helper (void)
174	{	453	{
175	const uint32_t u = 0x11223344;	454	const uint32_t u = 0x11223344;
176	return (unsigned char )&u;	455	return (unsigned char )&u;
177	}	456	}
178		457
179	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;	458	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
180	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };	459	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
181	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;	460	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
182	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };	461	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
183		462
		463	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		464	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		465	#else
184	#define ecb_mod(m, n) ((m) < 0 ? ((n) - (-(m) % (n))) : ((m) % (n)))	466	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		467	#endif
		468
		469	#if __cplusplus
		470	template<typename T>
		471	static inline T ecb_div_rd (T val, T div)
		472	{
		473	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		474	}
		475	template<typename T>
		476	static inline T ecb_div_ru (T val, T div)
		477	{
		478	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		479	}
		480	#else
		481	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		482	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		483	#endif
185		484
186	#if ecb_cplusplus_does_not_suck	485	#if ecb_cplusplus_does_not_suck
187	// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)	486	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
188	template<typename T, int N>	487	template<typename T, int N>
189	static inline int ecb_array_length (const T (&arr)[N])	488	static inline int ecb_array_length (const T (&arr)[N])
190	{	489	{
191	return N;	490	return N;
192	}	491	}
193	#else	492	#else
194	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	493	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
195	#endif	494	#endif
196		495
197	ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
198	ECB_INLINE uint32_t
199	ecb_rotr32 (uint32_t x, unsigned int count)
200	{
201	return (x << (32 - count)) \| (x >> count);
202	}
203
204	ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
205	ECB_INLINE uint32_t
206	ecb_rotl32 (uint32_t x, unsigned int count)
207	{
208	return (x >> (32 - count)) \| (x << count);
209	}
210
211	#endif	496	#endif
212		497

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Comparing libecb/ecb.h (file contents): Revision 1.26 by sf-exg, Thu May 26 21:35:39 2011 UTC vs. Revision 1.90 by root, Tue May 29 14:09:49 2012 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.26 by sf-exg, Thu May 26 21:35:39 2011 UTC vs.
Revision 1.90 by root, Tue May 29 14:09:49 2012 UTC