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

Comparing libecb/ecb.h (file contents):
Revision 1.38 by root, Sat Jun 11 14:02:40 2011 UTC vs.
Revision 1.97 by root, Thu May 31 15:47:25 2012 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
28	*/	28	*/
29		29
30	#ifndef ECB_H	30	#ifndef ECB_H
31	#define ECB_H	31	#define ECB_H
32		32
		33	/* 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)))
47	#endif	81	#endif
48	#endif	82	#endif
49		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
		137	#endif
		138	#endif
		139
		140	#ifndef ECB_MEMORY_FENCE
		141	#if ECB_GCC_VERSION(4,7)
		142	/* see comment below (stdatomic.h) about the C11 memory model. */
		143	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		144	#elif defined __clang && __has_feature (cxx_atomic)
		145	/* see comment below (stdatomic.h) about the C11 memory model. */
		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, neither gcc 4.7 nor clang 3.1 generate any instructions for */
		173	/* any fence other than seq_cst, which isn't very efficient for us. */
		174	/* Why that is, we don't know - either the C11 memory model is quite useless */
		175	/* for most usages, or gcc and clang have a bug */
		176	/* I currently lean towards the latter, and inefficiently implement */
		177	/* all three of ecb's fences as a seq_cst fence */
		178	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		179	#endif
		180	#endif
		181
		182	#ifndef ECB_MEMORY_FENCE
		183	#if !ECB_AVOID_PTHREADS
		184	/*
		185	* if you get undefined symbol references to pthread_mutex_lock,
		186	* or failure to find pthread.h, then you should implement
		187	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		188	* OR provide pthread.h and link against the posix thread library
		189	* of your system.
		190	*/
		191	#include <pthread.h>
		192	#define ECB_NEEDS_PTHREADS 1
		193	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		194
		195	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		196	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		197	#endif
		198	#endif
		199
		200	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		201	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		202	#endif
		203
		204	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		205	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		206	#endif
		207
		208	/*****************************************************************************/
		209
50	#ifdef __cplusplus	210	#if __cplusplus
51	#define ECB_INLINE static inline	211	#define ecb_inline static inline
52	#elif ECB_GCC_VERSION(2,5)	212	#elif ECB_GCC_VERSION(2,5)
53	#define ECB_INLINE static __inline__	213	#define ecb_inline static __inline__
54	#elif __STDC_VERSION__ >= 199901L	214	#elif ECB_C99
55	#define ECB_INLINE static inline	215	#define ecb_inline static inline
56	#else	216	#else
57	#define ECB_INLINE static	217	#define ecb_inline static
58	#endif	218	#endif
59		219
60	#if ECB_GCC_VERSION(3,3)	220	#if ECB_GCC_VERSION(3,3)
61	#define ecb_restrict __restrict__	221	#define ecb_restrict __restrict__
62	#elif __STDC_VERSION__ >= 199901L	222	#elif ECB_C99
63	#define ecb_restrict restrict	223	#define ecb_restrict restrict
64	#else	224	#else
65	#define ecb_restrict	225	#define ecb_restrict
66	#endif	226	#endif
67		227
…		…
70	#define ECB_CONCAT_(a, b) a ## b	230	#define ECB_CONCAT_(a, b) a ## b
71	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	231	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
72	#define ECB_STRINGIFY_(a) # a	232	#define ECB_STRINGIFY_(a) # a
73	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	233	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
74		234
75	#define ECB_HEADER_INLINE ECB_INLINE	235	#define ecb_function_ ecb_inline
76		236
77	#if ECB_GCC_VERSION(3,1)	237	#if ECB_GCC_VERSION(3,1)
78	#define ecb_attribute(attrlist) __attribute__(attrlist)	238	#define ecb_attribute(attrlist) __attribute__(attrlist)
79	#define ecb_is_constant(expr) __builtin_constant_p (expr)	239	#define ecb_is_constant(expr) __builtin_constant_p (expr)
80	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	240	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
…		…
88		248
89	/* no emulation for ecb_decltype */	249	/* no emulation for ecb_decltype */
90	#if ECB_GCC_VERSION(4,5)	250	#if ECB_GCC_VERSION(4,5)
91	#define ecb_decltype(x) __decltype(x)	251	#define ecb_decltype(x) __decltype(x)
92	#elif ECB_GCC_VERSION(3,0)	252	#elif ECB_GCC_VERSION(3,0)
93	#define ecb_decltype(x) typeof(x)	253	#define ecb_decltype(x) __typeof(x)
94	#endif	254	#endif
95		255
96	#define ecb_noinline ecb_attribute ((__noinline__))	256	#define ecb_noinline ecb_attribute ((__noinline__))
97	#define ecb_noreturn ecb_attribute ((__noreturn__))
98	#define ecb_unused ecb_attribute ((__unused__))	257	#define ecb_unused ecb_attribute ((__unused__))
99	#define ecb_const ecb_attribute ((__const__))	258	#define ecb_const ecb_attribute ((__const__))
100	#define ecb_pure ecb_attribute ((__pure__))	259	#define ecb_pure ecb_attribute ((__pure__))
101		260
		261	#if ECB_C11
		262	#define ecb_noreturn _Noreturn
		263	#else
		264	#define ecb_noreturn ecb_attribute ((__noreturn__))
		265	#endif
		266
102	#if ECB_GCC_VERSION(4,3)	267	#if ECB_GCC_VERSION(4,3)
103	#define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */	268	#define ecb_artificial ecb_attribute ((__artificial__))
104	#define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */	269	#define ecb_hot ecb_attribute ((__hot__))
105	#define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */	270	#define ecb_cold ecb_attribute ((__cold__))
106	#else	271	#else
107	#define ecb_artificial	272	#define ecb_artificial
108	#define ecb_hot	273	#define ecb_hot
109	#define ecb_cold	274	#define ecb_cold
110	#endif	275	#endif
111		276
112	/* put into if's if you are very sure that the expression */	277	/* put around conditional expressions if you are very sure that the */
113	/* is mostly true or mostly false. note that these return */	278	/* expression is mostly true or mostly false. note that these return */
114	/* booleans, not the expression. */	279	/* booleans, not the expression. */
115	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)	280	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
116	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)	281	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
117	/* for compatibility to the rest of the world */	282	/* for compatibility to the rest of the world */
118	#define ecb_likely(expr) ecb_expect_true (expr)	283	#define ecb_likely(expr) ecb_expect_true (expr)
119	#define ecb_unlikely(expr) ecb_expect_false (expr)	284	#define ecb_unlikely(expr) ecb_expect_false (expr)
120		285
121	/* try to tell the compiler that some condition is definitely true */
122	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
123
124	/* count trailing zero bits and count # of one bits */	286	/* count trailing zero bits and count # of one bits */
125	#if ECB_GCC_VERSION(3,4)	287	#if ECB_GCC_VERSION(3,4)
		288	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
		289	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
		290	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
126	#define ecb_ctz32(x) __builtin_ctz (x)	291	#define ecb_ctz32(x) __builtin_ctz (x)
		292	#define ecb_ctz64(x) __builtin_ctzll (x)
127	#define ecb_popcount32(x) __builtin_popcount (x)	293	#define ecb_popcount32(x) __builtin_popcount (x)
		294	/* no popcountll */
128	#else	295	#else
129	ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;	296	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
130	ECB_HEADER_INLINE int	297	ecb_function_ int
131	ecb_ctz32 (uint32_t x)	298	ecb_ctz32 (uint32_t x)
132	{	299	{
133	int r = 0;	300	int r = 0;
134		301
135	x &= -x; /* this isolates the lowest bit */	302	x &= ~x + 1; /* this isolates the lowest bit */
136		303
		304	#if ECB_branchless_on_i386
		305	r += !!(x & 0xaaaaaaaa) << 0;
		306	r += !!(x & 0xcccccccc) << 1;
		307	r += !!(x & 0xf0f0f0f0) << 2;
		308	r += !!(x & 0xff00ff00) << 3;
		309	r += !!(x & 0xffff0000) << 4;
		310	#else
137	if (x & 0xaaaaaaaa) r += 1;	311	if (x & 0xaaaaaaaa) r += 1;
138	if (x & 0xcccccccc) r += 2;	312	if (x & 0xcccccccc) r += 2;
139	if (x & 0xf0f0f0f0) r += 4;	313	if (x & 0xf0f0f0f0) r += 4;
140	if (x & 0xff00ff00) r += 8;	314	if (x & 0xff00ff00) r += 8;
141	if (x & 0xffff0000) r += 16;	315	if (x & 0xffff0000) r += 16;
		316	#endif
142		317
143	return r;	318	return r;
144	}	319	}
145		320
		321	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
		322	ecb_function_ int
		323	ecb_ctz64 (uint64_t x)
		324	{
		325	int shift = x & 0xffffffffU ? 0 : 32;
		326	return ecb_ctz32 (x >> shift) + shift;
		327	}
		328
146	ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;	329	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
147	ECB_HEADER_INLINE int	330	ecb_function_ int
148	ecb_popcount32 (uint32_t x)	331	ecb_popcount32 (uint32_t x)
149	{	332	{
150	x -= (x >> 1) & 0x55555555;	333	x -= (x >> 1) & 0x55555555;
151	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	334	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
152	x = ((x >> 4) + x) & 0x0f0f0f0f;	335	x = ((x >> 4) + x) & 0x0f0f0f0f;
153	x *= 0x01010101;	336	x *= 0x01010101;
154		337
155	return x >> 24;	338	return x >> 24;
156	}	339	}
		340
		341	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
		342	ecb_function_ int ecb_ld32 (uint32_t x)
		343	{
		344	int r = 0;
		345
		346	if (x >> 16) { x >>= 16; r += 16; }
		347	if (x >> 8) { x >>= 8; r += 8; }
		348	if (x >> 4) { x >>= 4; r += 4; }
		349	if (x >> 2) { x >>= 2; r += 2; }
		350	if (x >> 1) { r += 1; }
		351
		352	return r;
		353	}
		354
		355	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
		356	ecb_function_ int ecb_ld64 (uint64_t x)
		357	{
		358	int r = 0;
		359
		360	if (x >> 32) { x >>= 32; r += 32; }
		361
		362	return r + ecb_ld32 (x);
		363	}
157	#endif	364	#endif
		365
		366	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
		367	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		368	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
		369	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		370
		371	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		372	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		373	{
		374	return ( (x * 0x0802U & 0x22110U)
		375	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		376	}
		377
		378	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		379	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		380	{
		381	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		382	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		383	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		384	x = ( x >> 8 ) \| ( x << 8);
		385
		386	return x;
		387	}
		388
		389	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		390	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		391	{
		392	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		393	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		394	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		395	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		396	x = ( x >> 16 ) \| ( x << 16);
		397
		398	return x;
		399	}
		400
		401	/* popcount64 is only available on 64 bit cpus as gcc builtin */
		402	/* so for this version we are lazy */
		403	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
		404	ecb_function_ int
		405	ecb_popcount64 (uint64_t x)
		406	{
		407	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		408	}
		409
		410	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
		411	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
		412	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
		413	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
		414	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
		415	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
		416	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
		417	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
		418
		419	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
		420	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
		421	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
		422	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
		423	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
		424	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
		425	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
		426	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
158		427
159	#if ECB_GCC_VERSION(4,3)	428	#if ECB_GCC_VERSION(4,3)
160	#define ecb_bswap32(x) __builtin_bswap32 (x)
161	#define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)	429	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		430	#define ecb_bswap32(x) __builtin_bswap32 (x)
		431	#define ecb_bswap64(x) __builtin_bswap64 (x)
162	#else	432	#else
		433	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
		434	ecb_function_ uint16_t
		435	ecb_bswap16 (uint16_t x)
		436	{
		437	return ecb_rotl16 (x, 8);
		438	}
		439
163	ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;	440	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
164	ECB_HEADER_INLINE uint32_t	441	ecb_function_ uint32_t
165	ecb_bswap32 (uint32_t x)	442	ecb_bswap32 (uint32_t x)
166	{	443	{
167	return (x >> 24)	444	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
168	\| ((x >> 8) & 0x0000ff00)
169	\| ((x << 8) & 0x00ff0000)
170	\| (x << 24);
171	}	445	}
172		446
173	ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;	447	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
174	ECB_HEADER_INLINE uint32_t	448	ecb_function_ uint64_t
175	ecb_bswap16 (uint32_t x)	449	ecb_bswap64 (uint64_t x)
176	{	450	{
177	return ((x >> 8) & 0xff)	451	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
178	\| ((x << 8) & 0x00ff0000)
179	\| (x << 24);
180	}	452	}
181	#endif	453	#endif
182		454
183	#if ECB_GCC_VERSION(4,5)	455	#if ECB_GCC_VERSION(4,5)
184	#define ecb_unreachable() __builtin_unreachable ()	456	#define ecb_unreachable() __builtin_unreachable ()
185	#else	457	#else
186	/* this seems to work fine, but gcc always emits a warning for it :/ */	458	/* this seems to work fine, but gcc always emits a warning for it :/ */
187	ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;	459	ecb_inline void ecb_unreachable (void) ecb_noreturn;
188	ECB_HEADER_INLINE void ecb_unreachable (void) { }	460	ecb_inline void ecb_unreachable (void) { }
189	#endif	461	#endif
190		462
		463	/* try to tell the compiler that some condition is definitely true */
		464	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
		465
191	ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;	466	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
192	ECB_HEADER_INLINE unsigned char	467	ecb_inline unsigned char
193	ecb_byteorder_helper (void)	468	ecb_byteorder_helper (void)
194	{	469	{
195	const uint32_t u = 0x11223344;	470	const uint32_t u = 0x11223344;
196	return (unsigned char )&u;	471	return (unsigned char )&u;
197	}	472	}
198		473
199	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;	474	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
200	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };	475	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
201	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;	476	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
202	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };	477	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
203		478
204	#if ECB_GCC_VERSION(3,0)	479	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
205	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	480	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
206	#else	481	#else
207	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	482	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
208	#endif	483	#endif
209		484
		485	#if __cplusplus
		486	template<typename T>
		487	static inline T ecb_div_rd (T val, T div)
		488	{
		489	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		490	}
		491	template<typename T>
		492	static inline T ecb_div_ru (T val, T div)
		493	{
		494	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		495	}
		496	#else
		497	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		498	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		499	#endif
		500
210	#if ecb_cplusplus_does_not_suck	501	#if ecb_cplusplus_does_not_suck
211	// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)	502	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
212	template<typename T, int N>	503	template<typename T, int N>
213	static inline int ecb_array_length (const T (&arr)[N])	504	static inline int ecb_array_length (const T (&arr)[N])
214	{	505	{
215	return N;	506	return N;
216	}	507	}
217	#else	508	#else
218	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	509	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
219	#endif	510	#endif
220		511
221	ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
222	ECB_INLINE uint32_t
223	ecb_rotr32 (uint32_t x, unsigned int count)
224	{
225	return (x << (32 - count)) \| (x >> count);
226	}
227
228	ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
229	ECB_INLINE uint32_t
230	ecb_rotl32 (uint32_t x, unsigned int count)
231	{
232	return (x >> (32 - count)) \| (x << count);
233	}
234
235	#endif	512	#endif
236		513

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Comparing libecb/ecb.h (file contents): Revision 1.38 by root, Sat Jun 11 14:02:40 2011 UTC vs. Revision 1.97 by root, Thu May 31 15:47:25 2012 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.38 by root, Sat Jun 11 14:02:40 2011 UTC vs.
Revision 1.97 by root, Thu May 31 15:47:25 2012 UTC