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

Comparing libecb/ecb.h (file contents):
Revision 1.88 by root, Mon May 28 08:40:25 2012 UTC vs.
Revision 1.161 by sf-exg, Thu Mar 19 20:55:22 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;
…		…
63	#else	74	#else
64	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
65	#endif	76	#endif
66	#endif	77	#endif
67		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
		89	#endif
		90
68	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
69	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
70	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
71	* or so.	94	* or so.
72	* 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
73	* 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.
74	*/	97	*/
75	#ifndef ECB_GCC_VERSION
76	#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__
77	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
78	#else	100	#else
79	#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)))
80	#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
81	#endif	140	#endif
82		141
83	/*****************************************************************************/	142	/*****************************************************************************/
84		143
85	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	144	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
86	/* 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 */
87		146
88	#if ECB_NO_THREADS	147	#if ECB_NO_THREADS
89	# define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
90	#endif	149	#endif
91		150
92	#if ECB_NO_THREADS \|\| ECB_NO_SMP	151	#if ECB_NO_SMP
93	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
94	#endif	153	#endif
95		154
96	#ifndef ECB_MEMORY_FENCE	155	#ifndef ECB_MEMORY_FENCE
97	#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
98	#if __i386 \|\| __i386__	157	#if __i386 \|\| __i386__
99	#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")
100	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	159	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
101	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	160	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
102	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	161	#elif ECB_GCC_AMD64
103	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	162	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
104	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	163	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
105	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	164	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
106	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	165	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
107	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	166	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
108	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \	167	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
109	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	168	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
110	#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")
111	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	170	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
112	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	171	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
113	#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")
114	#elif __sparc \|\| __sparc__	175	#elif (__sparc \|\| __sparc__) && !__sparcv8
115	#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")
116	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	177	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
117	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	178	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
118	#elif defined __s390__ \|\| defined __s390x__	179	#elif defined __s390__ \|\| defined __s390x__
119	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	180	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
120	#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. */
121	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	184	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
122	#elif defined __alpha__	185	#elif defined __alpha__
123	#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")
124	#endif	198	#endif
125	#endif	199	#endif
126	#endif	200	#endif
127		201
128	#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
129	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	215	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
130	#define ECB_MEMORY_FENCE __sync_synchronize ()	216	#define ECB_MEMORY_FENCE __sync_synchronize ()
131	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	217	#elif _MSC_VER >= 1500 /* VC++ 2008 */
132	/#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()
133	#elif _MSC_VER >= 1400 /* VC++ 2005 */	223	#elif _MSC_VER >= 1400 /* VC++ 2005 */
134	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	224	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
135	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	225	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
136	#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 */
137	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	227	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
147	#define ECB_MEMORY_FENCE __sync ()	237	#define ECB_MEMORY_FENCE __sync ()
148	#endif	238	#endif
149	#endif	239	#endif
150		240
151	#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
152	#if !ECB_AVOID_PTHREADS	259	#if !ECB_AVOID_PTHREADS
153	/*	260	/*
154	* if you get undefined symbol references to pthread_mutex_lock,	261	* if you get undefined symbol references to pthread_mutex_lock,
155	* or failure to find pthread.h, then you should implement	262	* or failure to find pthread.h, then you should implement
156	* the ECB_MEMORY_FENCE operations for your cpu/compiler	263	* the ECB_MEMORY_FENCE operations for your cpu/compiler
…		…
174	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	281	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
175	#endif	282	#endif
176		283
177	/*****************************************************************************/	284	/*****************************************************************************/
178		285
179	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	286	#if ECB_CPP
180
181	#if __cplusplus
182	#define ecb_inline static inline	287	#define ecb_inline static inline
183	#elif ECB_GCC_VERSION(2,5)	288	#elif ECB_GCC_VERSION(2,5)
184	#define ecb_inline static __inline__	289	#define ecb_inline static __inline__
185	#elif ECB_C99	290	#elif ECB_C99
186	#define ecb_inline static inline	291	#define ecb_inline static inline
…		…
200		305
201	#define ECB_CONCAT_(a, b) a ## b	306	#define ECB_CONCAT_(a, b) a ## b
202	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	307	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
203	#define ECB_STRINGIFY_(a) # a	308	#define ECB_STRINGIFY_(a) # a
204	#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))
205		311
206	#define ecb_function_ ecb_inline	312	#define ecb_function_ ecb_inline
207		313
208	#if ECB_GCC_VERSION(3,1)	314	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
209	#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)
210	#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)
211	#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)
212	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	337	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
213	#else	338	#else
214	#define ecb_attribute(attrlist)
215	#define ecb_is_constant(expr) 0
216	#define ecb_expect(expr,value) (expr)
217	#define ecb_prefetch(addr,rw,locality)	339	#define ecb_prefetch(addr,rw,locality)
218	#endif	340	#endif
219		341
220	/* no emulation for ecb_decltype */	342	/* no emulation for ecb_decltype */
221	#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; };
222	#define ecb_decltype(x) __decltype(x)	346	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
223	#elif ECB_GCC_VERSION(3,0)	347	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
224	#define ecb_decltype(x) __typeof(x)	348	#define ecb_decltype(x) __typeof__ (x)
225	#endif	349	#endif
226		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
227	#define ecb_noinline ecb_attribute ((__noinline__))	368	#define ecb_noinline ecb_attribute ((__noinline__))
228	#define ecb_noreturn ecb_attribute ((__noreturn__))	369	#endif
		370
229	#define ecb_unused ecb_attribute ((__unused__))	371	#define ecb_unused ecb_attribute ((__unused__))
230	#define ecb_const ecb_attribute ((__const__))	372	#define ecb_const ecb_attribute ((__const__))
231	#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
232		386
233	#if ECB_GCC_VERSION(4,3)	387	#if ECB_GCC_VERSION(4,3)
234	#define ecb_artificial ecb_attribute ((__artificial__))	388	#define ecb_artificial ecb_attribute ((__artificial__))
235	#define ecb_hot ecb_attribute ((__hot__))	389	#define ecb_hot ecb_attribute ((__hot__))
236	#define ecb_cold ecb_attribute ((__cold__))	390	#define ecb_cold ecb_attribute ((__cold__))
…		…
248	/* for compatibility to the rest of the world */	402	/* for compatibility to the rest of the world */
249	#define ecb_likely(expr) ecb_expect_true (expr)	403	#define ecb_likely(expr) ecb_expect_true (expr)
250	#define ecb_unlikely(expr) ecb_expect_false (expr)	404	#define ecb_unlikely(expr) ecb_expect_false (expr)
251		405
252	/* count trailing zero bits and count # of one bits */	406	/* count trailing zero bits and count # of one bits */
253	#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))
254	/* 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 */
255	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	412	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
256	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	413	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
257	#define ecb_ctz32(x) __builtin_ctz (x)	414	#define ecb_ctz32(x) __builtin_ctz (x)
258	#define ecb_ctz64(x) __builtin_ctzll (x)	415	#define ecb_ctz64(x) __builtin_ctzll (x)
259	#define ecb_popcount32(x) __builtin_popcount (x)	416	#define ecb_popcount32(x) __builtin_popcount (x)
260	/* no popcountll */	417	/* no popcountll */
261	#else	418	#else
262	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	419	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
263	ecb_function_ int	420	ecb_function_ ecb_const int
264	ecb_ctz32 (uint32_t x)	421	ecb_ctz32 (uint32_t x)
265	{	422	{
266	int r = 0;	423	int r = 0;
267		424
268	x &= ~x + 1; /* this isolates the lowest bit */	425	x &= ~x + 1; /* this isolates the lowest bit */
…		…
282	#endif	439	#endif
283		440
284	return r;	441	return r;
285	}	442	}
286		443
287	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	444	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
288	ecb_function_ int	445	ecb_function_ ecb_const int
289	ecb_ctz64 (uint64_t x)	446	ecb_ctz64 (uint64_t x)
290	{	447	{
291	int shift = x & 0xffffffffU ? 0 : 32;	448	int shift = x & 0xffffffffU ? 0 : 32;
292	return ecb_ctz32 (x >> shift) + shift;	449	return ecb_ctz32 (x >> shift) + shift;
293	}	450	}
294		451
295	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	452	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
296	ecb_function_ int	453	ecb_function_ ecb_const int
297	ecb_popcount32 (uint32_t x)	454	ecb_popcount32 (uint32_t x)
298	{	455	{
299	x -= (x >> 1) & 0x55555555;	456	x -= (x >> 1) & 0x55555555;
300	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	457	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
301	x = ((x >> 4) + x) & 0x0f0f0f0f;	458	x = ((x >> 4) + x) & 0x0f0f0f0f;
302	x *= 0x01010101;	459	x *= 0x01010101;
303		460
304	return x >> 24;	461	return x >> 24;
305	}	462	}
306		463
307	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	464	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
308	ecb_function_ int ecb_ld32 (uint32_t x)	465	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
309	{	466	{
310	int r = 0;	467	int r = 0;
311		468
312	if (x >> 16) { x >>= 16; r += 16; }	469	if (x >> 16) { x >>= 16; r += 16; }
313	if (x >> 8) { x >>= 8; r += 8; }	470	if (x >> 8) { x >>= 8; r += 8; }
…		…
316	if (x >> 1) { r += 1; }	473	if (x >> 1) { r += 1; }
317		474
318	return r;	475	return r;
319	}	476	}
320		477
321	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	478	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
322	ecb_function_ int ecb_ld64 (uint64_t x)	479	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
323	{	480	{
324	int r = 0;	481	int r = 0;
325		482
326	if (x >> 32) { x >>= 32; r += 32; }	483	if (x >> 32) { x >>= 32; r += 32; }
327		484
328	return r + ecb_ld32 (x);	485	return r + ecb_ld32 (x);
329	}	486	}
330	#endif	487	#endif
331		488
332	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);
333	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)); }
334	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);
335	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)); }
336		493
337	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	494	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
338	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	495	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
339	{	496	{
340	return ( (x * 0x0802U & 0x22110U)	497	return ( (x * 0x0802U & 0x22110U)
341	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	498	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
342	}	499	}
343		500
344	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	501	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
345	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	502	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
346	{	503	{
347	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	504	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
348	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	505	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
349	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	506	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
350	x = ( x >> 8 ) \| ( x << 8);	507	x = ( x >> 8 ) \| ( x << 8);
351		508
352	return x;	509	return x;
353	}	510	}
354		511
355	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	512	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
356	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	513	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
357	{	514	{
358	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	515	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
359	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	516	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
360	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	517	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
361	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	518	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
364	return x;	521	return x;
365	}	522	}
366		523
367	/* popcount64 is only available on 64 bit cpus as gcc builtin */	524	/* popcount64 is only available on 64 bit cpus as gcc builtin */
368	/* so for this version we are lazy */	525	/* so for this version we are lazy */
369	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	526	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
370	ecb_function_ int	527	ecb_function_ ecb_const int
371	ecb_popcount64 (uint64_t x)	528	ecb_popcount64 (uint64_t x)
372	{	529	{
373	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	530	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
374	}	531	}
375		532
376	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);
377	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);
378	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);
379	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);
380	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);
381	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);
382	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);
383	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);
384		541
385	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); }
386	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); }
387	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); }
388	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); }
389	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); }
390	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); }
391	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); }
392	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); }
393		550
394	#if ECB_GCC_VERSION(4,3)	551	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
395	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	552	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
396	#define ecb_bswap32(x) __builtin_bswap32 (x)	553	#define ecb_bswap32(x) __builtin_bswap32 (x)
397	#define ecb_bswap64(x) __builtin_bswap64 (x)	554	#define ecb_bswap64(x) __builtin_bswap64 (x)
398	#else	555	#else
399	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	556	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
400	ecb_function_ uint16_t	557	ecb_function_ ecb_const uint16_t
401	ecb_bswap16 (uint16_t x)	558	ecb_bswap16 (uint16_t x)
402	{	559	{
403	return ecb_rotl16 (x, 8);	560	return ecb_rotl16 (x, 8);
404	}	561	}
405		562
406	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	563	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
407	ecb_function_ uint32_t	564	ecb_function_ ecb_const uint32_t
408	ecb_bswap32 (uint32_t x)	565	ecb_bswap32 (uint32_t x)
409	{	566	{
410	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	567	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
411	}	568	}
412		569
413	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	570	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
414	ecb_function_ uint64_t	571	ecb_function_ ecb_const uint64_t
415	ecb_bswap64 (uint64_t x)	572	ecb_bswap64 (uint64_t x)
416	{	573	{
417	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	574	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
418	}	575	}
419	#endif	576	#endif
420		577
421	#if ECB_GCC_VERSION(4,5)	578	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
422	#define ecb_unreachable() __builtin_unreachable ()	579	#define ecb_unreachable() __builtin_unreachable ()
423	#else	580	#else
424	/* 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 :/ */
425	ecb_inline void ecb_unreachable (void) ecb_noreturn;	582	ecb_inline ecb_noreturn void ecb_unreachable (void);
426	ecb_inline void ecb_unreachable (void) { }	583	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
427	#endif	584	#endif
428		585
429	/* try to tell the compiler that some condition is definitely true */	586	/* try to tell the compiler that some condition is definitely true */
430	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	587	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
431		588
432	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	589	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
433	ecb_inline unsigned char	590	ecb_inline ecb_const unsigned char
434	ecb_byteorder_helper (void)	591	ecb_byteorder_helper (void)
435	{	592	{
436	const uint32_t u = 0x11223344;	593	/* the union code still generates code under pressure in gcc, */
437	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
438	}	613	}
439		614
440	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	615	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
441	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; }
442	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	617	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
443	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; }
444		619
445	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	620	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
446	#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))
447	#else	622	#else
448	#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)))
449	#endif	624	#endif
450		625
451	#if __cplusplus	626	#if ECB_CPP
452	template<typename T>	627	template<typename T>
453	static inline T ecb_div_rd (T val, T div)	628	static inline T ecb_div_rd (T val, T div)
454	{	629	{
455	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	630	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
456	}	631	}
…		…
473	}	648	}
474	#else	649	#else
475	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	650	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
476	#endif	651	#endif
477		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
478	#endif	688	#endif
479		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 ((double) (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 1.88 by root, Mon May 28 08:40:25 2012 UTC vs. Revision 1.161 by sf-exg, Thu Mar 19 20:55:22 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.88 by root, Mon May 28 08:40:25 2012 UTC vs.
Revision 1.161 by sf-exg, Thu Mar 19 20:55:22 2015 UTC