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

Comparing libecb/ecb.h (file contents):
Revision 1.82 by root, Fri Mar 23 19:05:22 2012 UTC vs.
Revision 1.164 by root, Mon Apr 20 20:06:30 2015 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2015 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:
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
		43
		44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x00010004
32		46
33	#ifdef _WIN32	47	#ifdef _WIN32
34	typedef signed char int8_t;	48	typedef signed char int8_t;
35	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
36	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
42	typedef unsigned long long uint64_t;	56	typedef unsigned long long uint64_t;
43	#else /* _MSC_VER \|\| __BORLANDC__ */	57	#else /* _MSC_VER \|\| __BORLANDC__ */
44	typedef signed __int64 int64_t;	58	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	59	typedef unsigned __int64 uint64_t;
46	#endif	60	#endif
		61	#ifdef _WIN64
		62	#define ECB_PTRSIZE 8
		63	typedef uint64_t uintptr_t;
		64	typedef int64_t intptr_t;
		65	#else
		66	#define ECB_PTRSIZE 4
		67	typedef uint32_t uintptr_t;
		68	typedef int32_t intptr_t;
		69	#endif
47	#else	70	#else
48	#include <inttypes.h>	71	#include <inttypes.h>
		72	#if UINTMAX_MAX > 0xffffffffU
		73	#define ECB_PTRSIZE 8
		74	#else
		75	#define ECB_PTRSIZE 4
		76	#endif
		77	#endif
		78
		79	#define ECB_GCC_AMD64 (__amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__)
		80	#define ECB_MSVC_AMD64 (_M_AMD64 \|\| _M_X64)
		81
		82	/* work around x32 idiocy by defining proper macros */
		83	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		84	#if _ILP32
		85	#define ECB_AMD64_X32 1
		86	#else
		87	#define ECB_AMD64 1
		88	#endif
49	#endif	89	#endif
50		90
51	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
53	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	94	* or so.
55	* we try to detect these and simply assume they are not gcc - if they have	95	* we try to detect these and simply assume they are not gcc - if they have
56	* an issue with that they should have done it right in the first place.	96	* an issue with that they should have done it right in the first place.
57	*/	97	*/
58	#ifndef ECB_GCC_VERSION
59	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)	98	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
60	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
61	#else	100	#else
62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	101	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63	#endif	102	#endif
		103
		104	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
		105
		106	#if __clang__ && defined __has_builtin
		107	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		108	#else
		109	#define ECB_CLANG_BUILTIN(x) 0
		110	#endif
		111
		112	#if __clang__ && defined __has_extension
		113	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		114	#else
		115	#define ECB_CLANG_EXTENSION(x) 0
		116	#endif
		117
		118	#define ECB_CPP (__cplusplus+0)
		119	#define ECB_CPP11 (__cplusplus >= 201103L)
		120
		121	#if ECB_CPP
		122	#define ECB_C 0
		123	#define ECB_STDC_VERSION 0
		124	#else
		125	#define ECB_C 1
		126	#define ECB_STDC_VERSION __STDC_VERSION__
		127	#endif
		128
		129	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		130	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		131
		132	#if ECB_CPP
		133	#define ECB_EXTERN_C extern "C"
		134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		135	#define ECB_EXTERN_C_END }
		136	#else
		137	#define ECB_EXTERN_C extern
		138	#define ECB_EXTERN_C_BEG
		139	#define ECB_EXTERN_C_END
64	#endif	140	#endif
65		141
66	/*****************************************************************************/	142	/*****************************************************************************/
67		143
68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	144	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
69	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	145	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70		146
71	#if ECB_NO_THREADS	147	#if ECB_NO_THREADS
72	# define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
73	#endif	149	#endif
74		150
75	#if ECB_NO_THREADS \|\| ECB_NO_SMP	151	#if ECB_NO_SMP
76	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
77	#endif	153	#endif
78		154
79	#ifndef ECB_MEMORY_FENCE	155	#ifndef ECB_MEMORY_FENCE
80	#if ECB_GCC_VERSION(2,5) \|\| defined(__INTEL_COMPILER) \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	156	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
81	#if __i386 \|\| __i386__	157	#if __i386 \|\| __i386__
82	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	158	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
83	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	159	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
84	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	160	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
85	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	161	#elif ECB_GCC_AMD64
86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	162	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
87	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	163	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
88	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	164	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
89	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	165	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
90	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	166	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
91	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \	167	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
92	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__)	168	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
93	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	169	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
94	#elif defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \	170	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
95	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )	171	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
96	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	172	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		173	#elif __aarch64__
		174	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
97	#elif __sparc \|\| __sparc__	175	#elif (__sparc \|\| __sparc__) && !__sparcv8
98	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")	176	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
99	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	177	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
100	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	178	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
101	#elif defined(__s390__) \|\| defined(__s390x__)	179	#elif defined __s390__ \|\| defined __s390x__
102	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	180	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
103	#elif defined(__mips__)	181	#elif defined __mips__
		182	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		183	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
		184	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		185	#elif defined __alpha__
104	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	186	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		187	#elif defined __hppa__
		188	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		189	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		190	#elif defined __ia64__
		191	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		192	#elif defined __m68k__
		193	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		194	#elif defined __m88k__
		195	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		196	#elif defined __sh__
		197	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
105	#endif	198	#endif
106	#endif	199	#endif
107	#endif	200	#endif
108		201
109	#ifndef ECB_MEMORY_FENCE	202	#ifndef ECB_MEMORY_FENCE
		203	#if ECB_GCC_VERSION(4,7)
		204	/* see comment below (stdatomic.h) about the C11 memory model. */
		205	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		206	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		207	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		208
		209	#elif ECB_CLANG_EXTENSION(c_atomic)
		210	/* see comment below (stdatomic.h) about the C11 memory model. */
		211	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		212	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		213	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		214
110	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER) \|\| defined(__clang__)	215	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
111	#define ECB_MEMORY_FENCE __sync_synchronize ()	216	#define ECB_MEMORY_FENCE __sync_synchronize ()
112	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	217	#elif _MSC_VER >= 1500 /* VC++ 2008 */
113	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	218	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		219	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		220	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		221	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		222	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
114	#elif _MSC_VER >= 1400 /* VC++ 2005 */	223	#elif _MSC_VER >= 1400 /* VC++ 2005 */
115	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	224	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
116	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	225	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
117	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	226	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
118	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	227	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
119	#elif defined(_WIN32)	228	#elif defined _WIN32
120	#include <WinNT.h>	229	#include <WinNT.h>
121	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	230	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
122	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	231	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
123	#include <mbarrier.h>	232	#include <mbarrier.h>
124	#define ECB_MEMORY_FENCE __machine_rw_barrier ()	233	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
125	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()	234	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
126	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()	235	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
127	#elif __xlC__	236	#elif __xlC__
128	#define ECB_MEMORY_FENCE __lwsync ()	237	#define ECB_MEMORY_FENCE __sync ()
		238	#endif
		239	#endif
		240
		241	#ifndef ECB_MEMORY_FENCE
		242	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		243	/* we assume that these memory fences work on all variables/all memory accesses, */
		244	/* not just C11 atomics and atomic accesses */
		245	#include <stdatomic.h>
		246	/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
		247	/* any fence other than seq_cst, which isn't very efficient for us. */
		248	/* Why that is, we don't know - either the C11 memory model is quite useless */
		249	/* for most usages, or gcc and clang have a bug */
		250	/* I currently lean towards the latter, and inefficiently implement */
		251	/* all three of ecb's fences as a seq_cst fence */
		252	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		253	/* for all __atomic_thread_fence's except seq_cst */
		254	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
129	#endif	255	#endif
130	#endif	256	#endif
131		257
132	#ifndef ECB_MEMORY_FENCE	258	#ifndef ECB_MEMORY_FENCE
133	#if !ECB_AVOID_PTHREADS	259	#if !ECB_AVOID_PTHREADS
…		…
145	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;	271	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
146	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)	272	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
147	#endif	273	#endif
148	#endif	274	#endif
149		275
150	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)	276	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
151	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE	277	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
152	#endif	278	#endif
153		279
154	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)	280	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
155	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	281	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
156	#endif	282	#endif
157		283
158	/*****************************************************************************/	284	/*****************************************************************************/
159		285
160	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	286	#if ECB_CPP
161
162	#if __cplusplus
163	#define ecb_inline static inline	287	#define ecb_inline static inline
164	#elif ECB_GCC_VERSION(2,5)	288	#elif ECB_GCC_VERSION(2,5)
165	#define ecb_inline static __inline__	289	#define ecb_inline static __inline__
166	#elif ECB_C99	290	#elif ECB_C99
167	#define ecb_inline static inline	291	#define ecb_inline static inline
…		…
181		305
182	#define ECB_CONCAT_(a, b) a ## b	306	#define ECB_CONCAT_(a, b) a ## b
183	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	307	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
184	#define ECB_STRINGIFY_(a) # a	308	#define ECB_STRINGIFY_(a) # a
185	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	309	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		310	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
186		311
187	#define ecb_function_ ecb_inline	312	#define ecb_function_ ecb_inline
188		313
189	#if ECB_GCC_VERSION(3,1)	314	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
190	#define ecb_attribute(attrlist) __attribute__(attrlist)	315	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		316	#else
		317	#define ecb_attribute(attrlist)
		318	#endif
		319
		320	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
191	#define ecb_is_constant(expr) __builtin_constant_p (expr)	321	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		322	#else
		323	/* possible C11 impl for integral types
		324	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		325	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		326
		327	#define ecb_is_constant(expr) 0
		328	#endif
		329
		330	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
192	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	331	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		332	#else
		333	#define ecb_expect(expr,value) (expr)
		334	#endif
		335
		336	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
193	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	337	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
194	#else	338	#else
195	#define ecb_attribute(attrlist)
196	#define ecb_is_constant(expr) 0
197	#define ecb_expect(expr,value) (expr)
198	#define ecb_prefetch(addr,rw,locality)	339	#define ecb_prefetch(addr,rw,locality)
199	#endif	340	#endif
200		341
201	/* no emulation for ecb_decltype */	342	/* no emulation for ecb_decltype */
202	#if ECB_GCC_VERSION(4,5)	343	#if ECB_CPP11
		344	// older implementations might have problems with decltype(x)::type, work around it
		345	template<class T> struct ecb_decltype_t { typedef T type; };
203	#define ecb_decltype(x) __decltype(x)	346	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
204	#elif ECB_GCC_VERSION(3,0)	347	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
205	#define ecb_decltype(x) __typeof(x)	348	#define ecb_decltype(x) __typeof__ (x)
206	#endif	349	#endif
207		350
		351	#if _MSC_VER >= 1300
		352	#define ecb_deprecated __declspec (deprecated)
		353	#else
		354	#define ecb_deprecated ecb_attribute ((__deprecated__))
		355	#endif
		356
		357	#if _MSC_VER >= 1500
		358	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		359	#elif ECB_GCC_VERSION(4,5)
		360	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		361	#else
		362	#define ecb_deprecated_message(msg) ecb_deprecated
		363	#endif
		364
		365	#if _MSC_VER >= 1400
		366	#define ecb_noinline __declspec (noinline)
		367	#else
208	#define ecb_noinline ecb_attribute ((__noinline__))	368	#define ecb_noinline ecb_attribute ((__noinline__))
209	#define ecb_noreturn ecb_attribute ((__noreturn__))	369	#endif
		370
210	#define ecb_unused ecb_attribute ((__unused__))	371	#define ecb_unused ecb_attribute ((__unused__))
211	#define ecb_const ecb_attribute ((__const__))	372	#define ecb_const ecb_attribute ((__const__))
212	#define ecb_pure ecb_attribute ((__pure__))	373	#define ecb_pure ecb_attribute ((__pure__))
		374
		375	#if ECB_C11 \|\| __IBMC_NORETURN
		376	/* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
		377	#define ecb_noreturn _Noreturn
		378	#elif ECB_CPP11
		379	#define ecb_noreturn [[noreturn]]
		380	#elif _MSC_VER >= 1200
		381	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		382	#define ecb_noreturn __declspec (noreturn)
		383	#else
		384	#define ecb_noreturn ecb_attribute ((__noreturn__))
		385	#endif
213		386
214	#if ECB_GCC_VERSION(4,3)	387	#if ECB_GCC_VERSION(4,3)
215	#define ecb_artificial ecb_attribute ((__artificial__))	388	#define ecb_artificial ecb_attribute ((__artificial__))
216	#define ecb_hot ecb_attribute ((__hot__))	389	#define ecb_hot ecb_attribute ((__hot__))
217	#define ecb_cold ecb_attribute ((__cold__))	390	#define ecb_cold ecb_attribute ((__cold__))
…		…
229	/* for compatibility to the rest of the world */	402	/* for compatibility to the rest of the world */
230	#define ecb_likely(expr) ecb_expect_true (expr)	403	#define ecb_likely(expr) ecb_expect_true (expr)
231	#define ecb_unlikely(expr) ecb_expect_false (expr)	404	#define ecb_unlikely(expr) ecb_expect_false (expr)
232		405
233	/* count trailing zero bits and count # of one bits */	406	/* count trailing zero bits and count # of one bits */
234	#if ECB_GCC_VERSION(3,4)	407	#if ECB_GCC_VERSION(3,4) \
		408	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		409	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		410	&& ECB_CLANG_BUILTIN(__builtin_popcount))
235	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	411	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
236	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	412	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
237	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	413	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
238	#define ecb_ctz32(x) __builtin_ctz (x)	414	#define ecb_ctz32(x) __builtin_ctz (x)
239	#define ecb_ctz64(x) __builtin_ctzll (x)	415	#define ecb_ctz64(x) __builtin_ctzll (x)
240	#define ecb_popcount32(x) __builtin_popcount (x)	416	#define ecb_popcount32(x) __builtin_popcount (x)
241	/* no popcountll */	417	/* no popcountll */
242	#else	418	#else
243	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	419	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
244	ecb_function_ int	420	ecb_function_ ecb_const int
245	ecb_ctz32 (uint32_t x)	421	ecb_ctz32 (uint32_t x)
246	{	422	{
247	int r = 0;	423	int r = 0;
248		424
249	x &= ~x + 1; /* this isolates the lowest bit */	425	x &= ~x + 1; /* this isolates the lowest bit */
…		…
263	#endif	439	#endif
264		440
265	return r;	441	return r;
266	}	442	}
267		443
268	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	444	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
269	ecb_function_ int	445	ecb_function_ ecb_const int
270	ecb_ctz64 (uint64_t x)	446	ecb_ctz64 (uint64_t x)
271	{	447	{
272	int shift = x & 0xffffffffU ? 0 : 32;	448	int shift = x & 0xffffffffU ? 0 : 32;
273	return ecb_ctz32 (x >> shift) + shift;	449	return ecb_ctz32 (x >> shift) + shift;
274	}	450	}
275		451
276	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	452	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
277	ecb_function_ int	453	ecb_function_ ecb_const int
278	ecb_popcount32 (uint32_t x)	454	ecb_popcount32 (uint32_t x)
279	{	455	{
280	x -= (x >> 1) & 0x55555555;	456	x -= (x >> 1) & 0x55555555;
281	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	457	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
282	x = ((x >> 4) + x) & 0x0f0f0f0f;	458	x = ((x >> 4) + x) & 0x0f0f0f0f;
283	x *= 0x01010101;	459	x *= 0x01010101;
284		460
285	return x >> 24;	461	return x >> 24;
286	}	462	}
287		463
288	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	464	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
289	ecb_function_ int ecb_ld32 (uint32_t x)	465	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
290	{	466	{
291	int r = 0;	467	int r = 0;
292		468
293	if (x >> 16) { x >>= 16; r += 16; }	469	if (x >> 16) { x >>= 16; r += 16; }
294	if (x >> 8) { x >>= 8; r += 8; }	470	if (x >> 8) { x >>= 8; r += 8; }
…		…
297	if (x >> 1) { r += 1; }	473	if (x >> 1) { r += 1; }
298		474
299	return r;	475	return r;
300	}	476	}
301		477
302	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	478	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
303	ecb_function_ int ecb_ld64 (uint64_t x)	479	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
304	{	480	{
305	int r = 0;	481	int r = 0;
306		482
307	if (x >> 32) { x >>= 32; r += 32; }	483	if (x >> 32) { x >>= 32; r += 32; }
308		484
309	return r + ecb_ld32 (x);	485	return r + ecb_ld32 (x);
310	}	486	}
311	#endif	487	#endif
312		488
		489	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		490	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		491	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		492	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		493
313	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	494	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
314	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	495	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
315	{	496	{
316	return ( (x * 0x0802U & 0x22110U)	497	return ( (x * 0x0802U & 0x22110U)
317	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	498	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
318	}	499	}
319		500
320	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	501	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
321	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	502	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
322	{	503	{
323	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	504	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
324	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	505	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
325	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	506	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
326	x = ( x >> 8 ) \| ( x << 8);	507	x = ( x >> 8 ) \| ( x << 8);
327		508
328	return x;	509	return x;
329	}	510	}
330		511
331	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	512	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
332	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	513	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
333	{	514	{
334	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	515	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
335	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	516	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
336	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	517	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
337	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	518	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
340	return x;	521	return x;
341	}	522	}
342		523
343	/* popcount64 is only available on 64 bit cpus as gcc builtin */	524	/* popcount64 is only available on 64 bit cpus as gcc builtin */
344	/* so for this version we are lazy */	525	/* so for this version we are lazy */
345	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	526	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
346	ecb_function_ int	527	ecb_function_ ecb_const int
347	ecb_popcount64 (uint64_t x)	528	ecb_popcount64 (uint64_t x)
348	{	529	{
349	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	530	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
350	}	531	}
351		532
352	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	533	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
353	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	534	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
354	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	535	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
355	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	536	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
356	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	537	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
357	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	538	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
358	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	539	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
359	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	540	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
360		541
361	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	542	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
362	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	543	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
363	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	544	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
364	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	545	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
365	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	546	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
366	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	547	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
367	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	548	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
368	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	549	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
369		550
370	#if ECB_GCC_VERSION(4,3)	551	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		552	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		553	#define ecb_bswap16(x) __builtin_bswap16 (x)
		554	#else
371	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	555	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		556	#endif
372	#define ecb_bswap32(x) __builtin_bswap32 (x)	557	#define ecb_bswap32(x) __builtin_bswap32 (x)
373	#define ecb_bswap64(x) __builtin_bswap64 (x)	558	#define ecb_bswap64(x) __builtin_bswap64 (x)
		559	#elif _MSC_VER
		560	#include <stdlib.h>
		561	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		562	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		563	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
374	#else	564	#else
375	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	565	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
376	ecb_function_ uint16_t	566	ecb_function_ ecb_const uint16_t
377	ecb_bswap16 (uint16_t x)	567	ecb_bswap16 (uint16_t x)
378	{	568	{
379	return ecb_rotl16 (x, 8);	569	return ecb_rotl16 (x, 8);
380	}	570	}
381		571
382	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	572	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
383	ecb_function_ uint32_t	573	ecb_function_ ecb_const uint32_t
384	ecb_bswap32 (uint32_t x)	574	ecb_bswap32 (uint32_t x)
385	{	575	{
386	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	576	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
387	}	577	}
388		578
389	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	579	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
390	ecb_function_ uint64_t	580	ecb_function_ ecb_const uint64_t
391	ecb_bswap64 (uint64_t x)	581	ecb_bswap64 (uint64_t x)
392	{	582	{
393	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	583	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
394	}	584	}
395	#endif	585	#endif
396		586
397	#if ECB_GCC_VERSION(4,5)	587	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
398	#define ecb_unreachable() __builtin_unreachable ()	588	#define ecb_unreachable() __builtin_unreachable ()
399	#else	589	#else
400	/* this seems to work fine, but gcc always emits a warning for it :/ */	590	/* this seems to work fine, but gcc always emits a warning for it :/ */
401	ecb_inline void ecb_unreachable (void) ecb_noreturn;	591	ecb_inline ecb_noreturn void ecb_unreachable (void);
402	ecb_inline void ecb_unreachable (void) { }	592	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
403	#endif	593	#endif
404		594
405	/* try to tell the compiler that some condition is definitely true */	595	/* try to tell the compiler that some condition is definitely true */
406	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	596	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
407		597
408	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	598	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
409	ecb_inline unsigned char	599	ecb_inline ecb_const unsigned char
410	ecb_byteorder_helper (void)	600	ecb_byteorder_helper (void)
411	{	601	{
412	const uint32_t u = 0x11223344;	602	/* the union code still generates code under pressure in gcc, */
413	return (unsigned char )&u;	603	/* but less than using pointers, and always seems to */
		604	/* successfully return a constant. */
		605	/* the reason why we have this horrible preprocessor mess */
		606	/* is to avoid it in all cases, at least on common architectures */
		607	/* or when using a recent enough gcc version (>= 4.6) */
		608	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		609	return 0x44;
		610	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
		611	return 0x44;
		612	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
		613	return 0x11;
		614	#else
		615	union
		616	{
		617	uint32_t i;
		618	uint8_t c;
		619	} u = { 0x11223344 };
		620	return u.c;
		621	#endif
414	}	622	}
415		623
416	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	624	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
417	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	625	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
418	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	626	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
419	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	627	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
420		628
421	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	629	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
422	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	630	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
423	#else	631	#else
424	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	632	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
425	#endif	633	#endif
426		634
427	#if __cplusplus	635	#if ECB_CPP
428	template<typename T>	636	template<typename T>
429	static inline T ecb_div_rd (T val, T div)	637	static inline T ecb_div_rd (T val, T div)
430	{	638	{
431	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	639	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
432	}	640	}
…		…
449	}	657	}
450	#else	658	#else
451	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	659	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
452	#endif	660	#endif
453		661
		662	/*******************************************************************************/
		663	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		664
		665	/* basically, everything uses "ieee pure-endian" floating point numbers */
		666	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		667	#if 0 \
		668	\|\| __i386 \|\| __i386__ \
		669	\|\| ECB_GCC_AMD64 \
		670	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		671	\|\| defined __s390__ \|\| defined __s390x__ \
		672	\|\| defined __mips__ \
		673	\|\| defined __alpha__ \
		674	\|\| defined __hppa__ \
		675	\|\| defined __ia64__ \
		676	\|\| defined __m68k__ \
		677	\|\| defined __m88k__ \
		678	\|\| defined __sh__ \
		679	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		680	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		681	\|\| defined __aarch64__
		682	#define ECB_STDFP 1
		683	#include <string.h> /* for memcpy */
		684	#else
		685	#define ECB_STDFP 0
		686	#endif
		687
		688	#ifndef ECB_NO_LIBM
		689
		690	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		691
		692	/* only the oldest of old doesn't have this one. solaris. */
		693	#ifdef INFINITY
		694	#define ECB_INFINITY INFINITY
		695	#else
		696	#define ECB_INFINITY HUGE_VAL
454	#endif	697	#endif
455		698
		699	#ifdef NAN
		700	#define ECB_NAN NAN
		701	#else
		702	#define ECB_NAN ECB_INFINITY
		703	#endif
		704
		705	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		706	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		707	#define ecb_frexpf(x,e) frexpf ((x), (e))
		708	#else
		709	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		710	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		711	#endif
		712
		713	/* converts an ieee half/binary16 to a float */
		714	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		715	ecb_function_ ecb_const float
		716	ecb_binary16_to_float (uint16_t x)
		717	{
		718	int e = (x >> 10) & 0x1f;
		719	int m = x & 0x3ff;
		720	float r;
		721
		722	if (!e ) r = ecb_ldexpf (m , -24);
		723	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
		724	else if (m ) r = ECB_NAN;
		725	else r = ECB_INFINITY;
		726
		727	return x & 0x8000 ? -r : r;
		728	}
		729
		730	/* convert a float to ieee single/binary32 */
		731	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		732	ecb_function_ ecb_const uint32_t
		733	ecb_float_to_binary32 (float x)
		734	{
		735	uint32_t r;
		736
		737	#if ECB_STDFP
		738	memcpy (&r, &x, 4);
		739	#else
		740	/* slow emulation, works for anything but -0 */
		741	uint32_t m;
		742	int e;
		743
		744	if (x == 0e0f ) return 0x00000000U;
		745	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		746	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		747	if (x != x ) return 0x7fbfffffU;
		748
		749	m = ecb_frexpf (x, &e) * 0x1000000U;
		750
		751	r = m & 0x80000000U;
		752
		753	if (r)
		754	m = -m;
		755
		756	if (e <= -126)
		757	{
		758	m &= 0xffffffU;
		759	m >>= (-125 - e);
		760	e = -126;
		761	}
		762
		763	r \|= (e + 126) << 23;
		764	r \|= m & 0x7fffffU;
		765	#endif
		766
		767	return r;
		768	}
		769
		770	/* converts an ieee single/binary32 to a float */
		771	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		772	ecb_function_ ecb_const float
		773	ecb_binary32_to_float (uint32_t x)
		774	{
		775	float r;
		776
		777	#if ECB_STDFP
		778	memcpy (&r, &x, 4);
		779	#else
		780	/* emulation, only works for normals and subnormals and +0 */
		781	int neg = x >> 31;
		782	int e = (x >> 23) & 0xffU;
		783
		784	x &= 0x7fffffU;
		785
		786	if (e)
		787	x \|= 0x800000U;
		788	else
		789	e = 1;
		790
		791	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		792	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		793
		794	r = neg ? -r : r;
		795	#endif
		796
		797	return r;
		798	}
		799
		800	/* convert a double to ieee double/binary64 */
		801	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		802	ecb_function_ ecb_const uint64_t
		803	ecb_double_to_binary64 (double x)
		804	{
		805	uint64_t r;
		806
		807	#if ECB_STDFP
		808	memcpy (&r, &x, 8);
		809	#else
		810	/* slow emulation, works for anything but -0 */
		811	uint64_t m;
		812	int e;
		813
		814	if (x == 0e0 ) return 0x0000000000000000U;
		815	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		816	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		817	if (x != x ) return 0X7ff7ffffffffffffU;
		818
		819	m = frexp (x, &e) * 0x20000000000000U;
		820
		821	r = m & 0x8000000000000000;;
		822
		823	if (r)
		824	m = -m;
		825
		826	if (e <= -1022)
		827	{
		828	m &= 0x1fffffffffffffU;
		829	m >>= (-1021 - e);
		830	e = -1022;
		831	}
		832
		833	r \|= ((uint64_t)(e + 1022)) << 52;
		834	r \|= m & 0xfffffffffffffU;
		835	#endif
		836
		837	return r;
		838	}
		839
		840	/* converts an ieee double/binary64 to a double */
		841	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		842	ecb_function_ ecb_const double
		843	ecb_binary64_to_double (uint64_t x)
		844	{
		845	double r;
		846
		847	#if ECB_STDFP
		848	memcpy (&r, &x, 8);
		849	#else
		850	/* emulation, only works for normals and subnormals and +0 */
		851	int neg = x >> 63;
		852	int e = (x >> 52) & 0x7ffU;
		853
		854	x &= 0xfffffffffffffU;
		855
		856	if (e)
		857	x \|= 0x10000000000000U;
		858	else
		859	e = 1;
		860
		861	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		862	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		863
		864	r = neg ? -r : r;
		865	#endif
		866
		867	return r;
		868	}
		869
		870	#endif
		871
		872	#endif
		873

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Comparing libecb/ecb.h (file contents): Revision 1.82 by root, Fri Mar 23 19:05:22 2012 UTC vs. Revision 1.164 by root, Mon Apr 20 20:06:30 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.82 by root, Fri Mar 23 19:05:22 2012 UTC vs.
Revision 1.164 by root, Mon Apr 20 20:06:30 2015 UTC