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

Comparing libecb/ecb.h (file contents):
Revision 1.92 by root, Tue May 29 17:17:56 2012 UTC vs.
Revision 1.160 by sf-exg, Thu Mar 19 15:43:51 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
32		43
33	/* 16 bits major, 16 bits minor */	44	/* 16 bits major, 16 bits minor */
34	#define ECB_VERSION 0x00010001	45	#define ECB_VERSION 0x00010004
35		46
36	#ifdef _WIN32	47	#ifdef _WIN32
37	typedef signed char int8_t;	48	typedef signed char int8_t;
38	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
39	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
54	#else	65	#else
55	#define ECB_PTRSIZE 4	66	#define ECB_PTRSIZE 4
56	typedef uint32_t uintptr_t;	67	typedef uint32_t uintptr_t;
57	typedef int32_t intptr_t;	68	typedef int32_t intptr_t;
58	#endif	69	#endif
59	typedef intptr_t ptrdiff_t;
60	#else	70	#else
61	#include <inttypes.h>	71	#include <inttypes.h>
62	#if UINTMAX_MAX > 0xffffffffU	72	#if UINTMAX_MAX > 0xffffffffU
63	#define ECB_PTRSIZE 8	73	#define ECB_PTRSIZE 8
64	#else	74	#else
65	#define ECB_PTRSIZE 4	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
66	#endif	88	#endif
67	#endif	89	#endif
68		90
69	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
70	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
71	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
72	* or so.	94	* or so.
73	* 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
74	* 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.
75	*/	97	*/
76	#ifndef ECB_GCC_VERSION
77	#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__
78	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
79	#else	100	#else
80	#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)))
81	#endif	102	#endif
82	#endif
83		103
84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	104	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	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
87	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
88	#define ECB_CPP98 (__cplusplus >= 199711L)
89	#define ECB_CPP11 (__cplusplus >= 201103L)	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
		140	#endif
90		141
91	/*****************************************************************************/	142	/*****************************************************************************/
92		143
93	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	144	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
94	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	145	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
95		146
96	#if ECB_NO_THREADS	147	#if ECB_NO_THREADS
97	# define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
98	#endif	149	#endif
99		150
100	#if ECB_NO_THREADS \|\| ECB_NO_SMP	151	#if ECB_NO_SMP
101	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
102	#endif
103
104	#ifndef ECB_MEMORY_FENCE
105	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
106	/* we assume that these memory fences work on all variables/all memory accesses, */
107	/* not just C11 atomics and atomic accesses */
108	#include <stdatomic.h>
109	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_acq_rel)
110	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
111	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
112	#endif
113	#endif
114
115	#ifndef ECB_MEMORY_FENCE_RELEASE
116	#if ECB_GCC_VERSION(4,7)
117	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_ACQ_REL)
118	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
119	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
120	#endif
121	#endif	153	#endif
122		154
123	#ifndef ECB_MEMORY_FENCE	155	#ifndef ECB_MEMORY_FENCE
124	#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
125	#if __i386 \|\| __i386__	157	#if __i386 \|\| __i386__
126	#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")
127	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	159	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
128	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	160	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
129	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	161	#elif ECB_GCC_AMD64
130	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	162	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
131	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	163	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
132	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	164	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
133	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	165	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
134	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	166	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
135	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \	167	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
136	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	168	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
137	#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")
138	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	170	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
139	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	171	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
140	#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")
141	#elif __sparc \|\| __sparc__	175	#elif (__sparc \|\| __sparc__) && !__sparcv8
142	#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")
143	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	177	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
144	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	178	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
145	#elif defined __s390__ \|\| defined __s390x__	179	#elif defined __s390__ \|\| defined __s390x__
146	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	180	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
147	#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. */
148	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	184	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
149	#elif defined __alpha__	185	#elif defined __alpha__
150	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "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")
151	#endif	198	#endif
152	#endif	199	#endif
153	#endif	200	#endif
154		201
155	#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
156	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	215	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
157	#define ECB_MEMORY_FENCE __sync_synchronize ()	216	#define ECB_MEMORY_FENCE __sync_synchronize ()
158	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	217	#elif _MSC_VER >= 1500 /* VC++ 2008 */
159	/#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()
160	#elif _MSC_VER >= 1400 /* VC++ 2005 */	223	#elif _MSC_VER >= 1400 /* VC++ 2005 */
161	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	224	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
162	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	225	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
163	#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 */
164	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	227	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
174	#define ECB_MEMORY_FENCE __sync ()	237	#define ECB_MEMORY_FENCE __sync ()
175	#endif	238	#endif
176	#endif	239	#endif
177		240
178	#ifndef ECB_MEMORY_FENCE	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)
		255	#endif
		256	#endif
		257
		258	#ifndef ECB_MEMORY_FENCE
179	#if !ECB_AVOID_PTHREADS	259	#if !ECB_AVOID_PTHREADS
180	/*	260	/*
181	* if you get undefined symbol references to pthread_mutex_lock,	261	* if you get undefined symbol references to pthread_mutex_lock,
182	* or failure to find pthread.h, then you should implement	262	* or failure to find pthread.h, then you should implement
183	* the ECB_MEMORY_FENCE operations for your cpu/compiler	263	* the ECB_MEMORY_FENCE operations for your cpu/compiler
…		…
201	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	281	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
202	#endif	282	#endif
203		283
204	/*****************************************************************************/	284	/*****************************************************************************/
205		285
206	#if __cplusplus	286	#if ECB_CPP
207	#define ecb_inline static inline	287	#define ecb_inline static inline
208	#elif ECB_GCC_VERSION(2,5)	288	#elif ECB_GCC_VERSION(2,5)
209	#define ecb_inline static __inline__	289	#define ecb_inline static __inline__
210	#elif ECB_C99	290	#elif ECB_C99
211	#define ecb_inline static inline	291	#define ecb_inline static inline
…		…
225		305
226	#define ECB_CONCAT_(a, b) a ## b	306	#define ECB_CONCAT_(a, b) a ## b
227	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	307	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
228	#define ECB_STRINGIFY_(a) # a	308	#define ECB_STRINGIFY_(a) # a
229	#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))
230		311
231	#define ecb_function_ ecb_inline	312	#define ecb_function_ ecb_inline
232		313
233	#if ECB_GCC_VERSION(3,1)	314	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
234	#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)
235	#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)
236	#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)
237	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	337	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
238	#else	338	#else
239	#define ecb_attribute(attrlist)
240	#define ecb_is_constant(expr) 0
241	#define ecb_expect(expr,value) (expr)
242	#define ecb_prefetch(addr,rw,locality)	339	#define ecb_prefetch(addr,rw,locality)
243	#endif	340	#endif
244		341
245	/* no emulation for ecb_decltype */	342	/* no emulation for ecb_decltype */
246	#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; };
247	#define ecb_decltype(x) __decltype(x)	346	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
248	#elif ECB_GCC_VERSION(3,0)	347	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
249	#define ecb_decltype(x) __typeof(x)	348	#define ecb_decltype(x) __typeof__ (x)
250	#endif	349	#endif
251		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
252	#define ecb_noinline ecb_attribute ((__noinline__))	368	#define ecb_noinline ecb_attribute ((__noinline__))
		369	#endif
		370
253	#define ecb_unused ecb_attribute ((__unused__))	371	#define ecb_unused ecb_attribute ((__unused__))
254	#define ecb_const ecb_attribute ((__const__))	372	#define ecb_const ecb_attribute ((__const__))
255	#define ecb_pure ecb_attribute ((__pure__))	373	#define ecb_pure ecb_attribute ((__pure__))
256		374
257	#if ECB_C11	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 */
258	#define ecb_noreturn _Noreturn	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)
259	#else	383	#else
260	#define ecb_noreturn ecb_attribute ((__noreturn__))	384	#define ecb_noreturn ecb_attribute ((__noreturn__))
261	#endif	385	#endif
262		386
263	#if ECB_GCC_VERSION(4,3)	387	#if ECB_GCC_VERSION(4,3)
…		…
278	/* for compatibility to the rest of the world */	402	/* for compatibility to the rest of the world */
279	#define ecb_likely(expr) ecb_expect_true (expr)	403	#define ecb_likely(expr) ecb_expect_true (expr)
280	#define ecb_unlikely(expr) ecb_expect_false (expr)	404	#define ecb_unlikely(expr) ecb_expect_false (expr)
281		405
282	/* count trailing zero bits and count # of one bits */	406	/* count trailing zero bits and count # of one bits */
283	#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))
284	/* 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 */
285	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	412	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
286	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	413	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
287	#define ecb_ctz32(x) __builtin_ctz (x)	414	#define ecb_ctz32(x) __builtin_ctz (x)
288	#define ecb_ctz64(x) __builtin_ctzll (x)	415	#define ecb_ctz64(x) __builtin_ctzll (x)
289	#define ecb_popcount32(x) __builtin_popcount (x)	416	#define ecb_popcount32(x) __builtin_popcount (x)
290	/* no popcountll */	417	/* no popcountll */
291	#else	418	#else
292	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	419	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
293	ecb_function_ int	420	ecb_function_ ecb_const int
294	ecb_ctz32 (uint32_t x)	421	ecb_ctz32 (uint32_t x)
295	{	422	{
296	int r = 0;	423	int r = 0;
297		424
298	x &= ~x + 1; /* this isolates the lowest bit */	425	x &= ~x + 1; /* this isolates the lowest bit */
…		…
312	#endif	439	#endif
313		440
314	return r;	441	return r;
315	}	442	}
316		443
317	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	444	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
318	ecb_function_ int	445	ecb_function_ ecb_const int
319	ecb_ctz64 (uint64_t x)	446	ecb_ctz64 (uint64_t x)
320	{	447	{
321	int shift = x & 0xffffffffU ? 0 : 32;	448	int shift = x & 0xffffffffU ? 0 : 32;
322	return ecb_ctz32 (x >> shift) + shift;	449	return ecb_ctz32 (x >> shift) + shift;
323	}	450	}
324		451
325	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	452	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
326	ecb_function_ int	453	ecb_function_ ecb_const int
327	ecb_popcount32 (uint32_t x)	454	ecb_popcount32 (uint32_t x)
328	{	455	{
329	x -= (x >> 1) & 0x55555555;	456	x -= (x >> 1) & 0x55555555;
330	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	457	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
331	x = ((x >> 4) + x) & 0x0f0f0f0f;	458	x = ((x >> 4) + x) & 0x0f0f0f0f;
332	x *= 0x01010101;	459	x *= 0x01010101;
333		460
334	return x >> 24;	461	return x >> 24;
335	}	462	}
336		463
337	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	464	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
338	ecb_function_ int ecb_ld32 (uint32_t x)	465	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
339	{	466	{
340	int r = 0;	467	int r = 0;
341		468
342	if (x >> 16) { x >>= 16; r += 16; }	469	if (x >> 16) { x >>= 16; r += 16; }
343	if (x >> 8) { x >>= 8; r += 8; }	470	if (x >> 8) { x >>= 8; r += 8; }
…		…
346	if (x >> 1) { r += 1; }	473	if (x >> 1) { r += 1; }
347		474
348	return r;	475	return r;
349	}	476	}
350		477
351	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	478	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
352	ecb_function_ int ecb_ld64 (uint64_t x)	479	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
353	{	480	{
354	int r = 0;	481	int r = 0;
355		482
356	if (x >> 32) { x >>= 32; r += 32; }	483	if (x >> 32) { x >>= 32; r += 32; }
357		484
358	return r + ecb_ld32 (x);	485	return r + ecb_ld32 (x);
359	}	486	}
360	#endif	487	#endif
361		488
362	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	489	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
363	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	490	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
364	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	491	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
365	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	492	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
366		493
367	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	494	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
368	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	495	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
369	{	496	{
370	return ( (x * 0x0802U & 0x22110U)	497	return ( (x * 0x0802U & 0x22110U)
371	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	498	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
372	}	499	}
373		500
374	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	501	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
375	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	502	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
376	{	503	{
377	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	504	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
378	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	505	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
379	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	506	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
380	x = ( x >> 8 ) \| ( x << 8);	507	x = ( x >> 8 ) \| ( x << 8);
381		508
382	return x;	509	return x;
383	}	510	}
384		511
385	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	512	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
386	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	513	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
387	{	514	{
388	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	515	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
389	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	516	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
390	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	517	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
391	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	518	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
394	return x;	521	return x;
395	}	522	}
396		523
397	/* popcount64 is only available on 64 bit cpus as gcc builtin */	524	/* popcount64 is only available on 64 bit cpus as gcc builtin */
398	/* so for this version we are lazy */	525	/* so for this version we are lazy */
399	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	526	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
400	ecb_function_ int	527	ecb_function_ ecb_const int
401	ecb_popcount64 (uint64_t x)	528	ecb_popcount64 (uint64_t x)
402	{	529	{
403	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	530	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
404	}	531	}
405		532
406	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);
407	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);
408	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);
409	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);
410	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);
411	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);
412	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);
413	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);
414		541
415	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); }
416	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); }
417	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); }
418	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); }
419	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); }
420	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); }
421	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); }
422	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); }
423		550
424	#if ECB_GCC_VERSION(4,3)	551	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
425	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	552	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
426	#define ecb_bswap32(x) __builtin_bswap32 (x)	553	#define ecb_bswap32(x) __builtin_bswap32 (x)
427	#define ecb_bswap64(x) __builtin_bswap64 (x)	554	#define ecb_bswap64(x) __builtin_bswap64 (x)
428	#else	555	#else
429	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	556	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
430	ecb_function_ uint16_t	557	ecb_function_ ecb_const uint16_t
431	ecb_bswap16 (uint16_t x)	558	ecb_bswap16 (uint16_t x)
432	{	559	{
433	return ecb_rotl16 (x, 8);	560	return ecb_rotl16 (x, 8);
434	}	561	}
435		562
436	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	563	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
437	ecb_function_ uint32_t	564	ecb_function_ ecb_const uint32_t
438	ecb_bswap32 (uint32_t x)	565	ecb_bswap32 (uint32_t x)
439	{	566	{
440	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	567	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
441	}	568	}
442		569
443	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	570	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
444	ecb_function_ uint64_t	571	ecb_function_ ecb_const uint64_t
445	ecb_bswap64 (uint64_t x)	572	ecb_bswap64 (uint64_t x)
446	{	573	{
447	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	574	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
448	}	575	}
449	#endif	576	#endif
450		577
451	#if ECB_GCC_VERSION(4,5)	578	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
452	#define ecb_unreachable() __builtin_unreachable ()	579	#define ecb_unreachable() __builtin_unreachable ()
453	#else	580	#else
454	/* this seems to work fine, but gcc always emits a warning for it :/ */	581	/* this seems to work fine, but gcc always emits a warning for it :/ */
455	ecb_inline void ecb_unreachable (void) ecb_noreturn;	582	ecb_inline ecb_noreturn void ecb_unreachable (void);
456	ecb_inline void ecb_unreachable (void) { }	583	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
457	#endif	584	#endif
458		585
459	/* try to tell the compiler that some condition is definitely true */	586	/* try to tell the compiler that some condition is definitely true */
460	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	587	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
461		588
462	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	589	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
463	ecb_inline unsigned char	590	ecb_inline ecb_const unsigned char
464	ecb_byteorder_helper (void)	591	ecb_byteorder_helper (void)
465	{	592	{
466	const uint32_t u = 0x11223344;	593	/* the union code still generates code under pressure in gcc, */
467	return (unsigned char )&u;	594	/* but less than using pointers, and always seems to */
		595	/* successfully return a constant. */
		596	/* the reason why we have this horrible preprocessor mess */
		597	/* is to avoid it in all cases, at least on common architectures */
		598	/* or when using a recent enough gcc version (>= 4.6) */
		599	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		600	return 0x44;
		601	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
		602	return 0x44;
		603	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
		604	return 0x11;
		605	#else
		606	union
		607	{
		608	uint32_t i;
		609	uint8_t c;
		610	} u = { 0x11223344 };
		611	return u.c;
		612	#endif
468	}	613	}
469		614
470	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	615	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
471	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	616	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
472	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	617	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
473	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	618	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
474		619
475	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	620	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
476	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	621	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
477	#else	622	#else
478	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	623	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
479	#endif	624	#endif
480		625
481	#if __cplusplus	626	#if ECB_CPP
482	template<typename T>	627	template<typename T>
483	static inline T ecb_div_rd (T val, T div)	628	static inline T ecb_div_rd (T val, T div)
484	{	629	{
485	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	630	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
486	}	631	}
…		…
503	}	648	}
504	#else	649	#else
505	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	650	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
506	#endif	651	#endif
507		652
		653	/*******************************************************************************/
		654	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		655
		656	/* basically, everything uses "ieee pure-endian" floating point numbers */
		657	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		658	#if 0 \
		659	\|\| __i386 \|\| __i386__ \
		660	\|\| ECB_GCC_AMD64 \
		661	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		662	\|\| defined __s390__ \|\| defined __s390x__ \
		663	\|\| defined __mips__ \
		664	\|\| defined __alpha__ \
		665	\|\| defined __hppa__ \
		666	\|\| defined __ia64__ \
		667	\|\| defined __m68k__ \
		668	\|\| defined __m88k__ \
		669	\|\| defined __sh__ \
		670	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		671	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		672	\|\| defined __aarch64__
		673	#define ECB_STDFP 1
		674	#include <string.h> /* for memcpy */
		675	#else
		676	#define ECB_STDFP 0
		677	#endif
		678
		679	#ifndef ECB_NO_LIBM
		680
		681	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		682
		683	/* only the oldest of old doesn't have this one. solaris. */
		684	#ifdef INFINITY
		685	#define ECB_INFINITY INFINITY
		686	#else
		687	#define ECB_INFINITY HUGE_VAL
508	#endif	688	#endif
509		689
		690	#ifdef NAN
		691	#define ECB_NAN NAN
		692	#else
		693	#define ECB_NAN ECB_INFINITY
		694	#endif
		695
		696	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		697	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		698	#else
		699	#define ecb_ldexpf(x,e) (float) ldexp ((float) (x), (e))
		700	#endif
		701
		702	/* converts an ieee half/binary16 to a float */
		703	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		704	ecb_function_ ecb_const float
		705	ecb_binary16_to_float (uint16_t x)
		706	{
		707	int e = (x >> 10) & 0x1f;
		708	int m = x & 0x3ff;
		709	float r;
		710
		711	if (!e ) r = ecb_ldexpf (m , -24);
		712	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
		713	else if (m ) r = ECB_NAN;
		714	else r = ECB_INFINITY;
		715
		716	return x & 0x8000 ? -r : r;
		717	}
		718
		719	/* convert a float to ieee single/binary32 */
		720	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		721	ecb_function_ ecb_const uint32_t
		722	ecb_float_to_binary32 (float x)
		723	{
		724	uint32_t r;
		725
		726	#if ECB_STDFP
		727	memcpy (&r, &x, 4);
		728	#else
		729	/* slow emulation, works for anything but -0 */
		730	uint32_t m;
		731	int e;
		732
		733	if (x == 0e0f ) return 0x00000000U;
		734	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		735	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		736	if (x != x ) return 0x7fbfffffU;
		737
		738	m = frexpf (x, &e) * 0x1000000U;
		739
		740	r = m & 0x80000000U;
		741
		742	if (r)
		743	m = -m;
		744
		745	if (e <= -126)
		746	{
		747	m &= 0xffffffU;
		748	m >>= (-125 - e);
		749	e = -126;
		750	}
		751
		752	r \|= (e + 126) << 23;
		753	r \|= m & 0x7fffffU;
		754	#endif
		755
		756	return r;
		757	}
		758
		759	/* converts an ieee single/binary32 to a float */
		760	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		761	ecb_function_ ecb_const float
		762	ecb_binary32_to_float (uint32_t x)
		763	{
		764	float r;
		765
		766	#if ECB_STDFP
		767	memcpy (&r, &x, 4);
		768	#else
		769	/* emulation, only works for normals and subnormals and +0 */
		770	int neg = x >> 31;
		771	int e = (x >> 23) & 0xffU;
		772
		773	x &= 0x7fffffU;
		774
		775	if (e)
		776	x \|= 0x800000U;
		777	else
		778	e = 1;
		779
		780	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		781	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		782
		783	r = neg ? -r : r;
		784	#endif
		785
		786	return r;
		787	}
		788
		789	/* convert a double to ieee double/binary64 */
		790	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		791	ecb_function_ ecb_const uint64_t
		792	ecb_double_to_binary64 (double x)
		793	{
		794	uint64_t r;
		795
		796	#if ECB_STDFP
		797	memcpy (&r, &x, 8);
		798	#else
		799	/* slow emulation, works for anything but -0 */
		800	uint64_t m;
		801	int e;
		802
		803	if (x == 0e0 ) return 0x0000000000000000U;
		804	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		805	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		806	if (x != x ) return 0X7ff7ffffffffffffU;
		807
		808	m = frexp (x, &e) * 0x20000000000000U;
		809
		810	r = m & 0x8000000000000000;;
		811
		812	if (r)
		813	m = -m;
		814
		815	if (e <= -1022)
		816	{
		817	m &= 0x1fffffffffffffU;
		818	m >>= (-1021 - e);
		819	e = -1022;
		820	}
		821
		822	r \|= ((uint64_t)(e + 1022)) << 52;
		823	r \|= m & 0xfffffffffffffU;
		824	#endif
		825
		826	return r;
		827	}
		828
		829	/* converts an ieee double/binary64 to a double */
		830	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		831	ecb_function_ ecb_const double
		832	ecb_binary64_to_double (uint64_t x)
		833	{
		834	double r;
		835
		836	#if ECB_STDFP
		837	memcpy (&r, &x, 8);
		838	#else
		839	/* emulation, only works for normals and subnormals and +0 */
		840	int neg = x >> 63;
		841	int e = (x >> 52) & 0x7ffU;
		842
		843	x &= 0xfffffffffffffU;
		844
		845	if (e)
		846	x \|= 0x10000000000000U;
		847	else
		848	e = 1;
		849
		850	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		851	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		852
		853	r = neg ? -r : r;
		854	#endif
		855
		856	return r;
		857	}
		858
		859	#endif
		860
		861	#endif
		862

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Comparing libecb/ecb.h (file contents): Revision 1.92 by root, Tue May 29 17:17:56 2012 UTC vs. Revision 1.160 by sf-exg, Thu Mar 19 15:43:51 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.92 by root, Tue May 29 17:17:56 2012 UTC vs.
Revision 1.160 by sf-exg, Thu Mar 19 15:43:51 2015 UTC