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

Comparing libecb/ecb.h (file contents):
Revision 1.120 by root, Sat Oct 26 09:13:54 2013 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
32		43
33	/* 16 bits major, 16 bits minor */	44	/* 16 bits major, 16 bits minor */
34	#define ECB_VERSION 0x00010003	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
68	/* work around x32 idiocy by defining proper macros */	82	/* work around x32 idiocy by defining proper macros */
69	#if __x86_64 \|\| _M_AMD64	83	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
70	#if _ILP32	84	#if _ILP32
71	#define ECB_AMD64_X32 1	85	#define ECB_AMD64_X32 1
72	#else	86	#else
73	#define ECB_AMD64 1	87	#define ECB_AMD64 1
74	#endif	88	#endif
…		…
79	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
80	* or so.	94	* or so.
81	* 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
82	* 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.
83	*/	97	*/
84	#ifndef ECB_GCC_VERSION
85	#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__
86	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
87	#else	100	#else
88	#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)))
89	#endif	102	#endif
90	#endif
91		103
92	#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)))
93	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
94	#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
95	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
96	#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)
97		131
98	#if ECB_CPP	132	#if ECB_CPP
99	#define ECB_EXTERN_C extern "C"	133	#define ECB_EXTERN_C extern "C"
100	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101	#define ECB_EXTERN_C_END }	135	#define ECB_EXTERN_C_END }
…		…
122	#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
123	#if __i386 \|\| __i386__	157	#if __i386 \|\| __i386__
124	#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")
125	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	159	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
126	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	160	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
127	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	161	#elif ECB_GCC_AMD64
128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	162	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
129	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	163	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
130	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	164	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
131	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	165	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	166	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
…		…
134	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	168	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
135	#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")
136	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	170	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
137	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	171	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
138	#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")
139	#elif __sparc \|\| __sparc__	175	#elif (__sparc \|\| __sparc__) && !__sparcv8
140	#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")
141	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	177	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	178	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
143	#elif defined __s390__ \|\| defined __s390x__	179	#elif defined __s390__ \|\| defined __s390x__
144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	180	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
…		…
165		201
166	#ifndef ECB_MEMORY_FENCE	202	#ifndef ECB_MEMORY_FENCE
167	#if ECB_GCC_VERSION(4,7)	203	#if ECB_GCC_VERSION(4,7)
168	/* see comment below (stdatomic.h) about the C11 memory model. */	204	/* see comment below (stdatomic.h) about the C11 memory model. */
169	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	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)
170		208
171	/* The __has_feature syntax from clang is so misdesigned that we cannot use it	209	#elif ECB_CLANG_EXTENSION(c_atomic)
172	* without risking compile time errors with other compilers. We could
173	* define our own ecb_clang_has_feature, but I just can't be bothered to work
174	* around this shit time and again.
175	* #elif defined __clang && __has_feature (cxx_atomic)
176	* // see comment below (stdatomic.h) about the C11 memory model.	210	/* see comment below (stdatomic.h) about the C11 memory model. */
177	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	211	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
178	*/	212	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		213	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
179		214
180	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	215	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
181	#define ECB_MEMORY_FENCE __sync_synchronize ()	216	#define ECB_MEMORY_FENCE __sync_synchronize ()
		217	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		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()
182	#elif _MSC_VER >= 1400 /* VC++ 2005 */	223	#elif _MSC_VER >= 1400 /* VC++ 2005 */
183	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	224	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
184	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	225	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
185	#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 */
186	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	227	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
206	/* any fence other than seq_cst, which isn't very efficient for us. */	247	/* any fence other than seq_cst, which isn't very efficient for us. */
207	/* Why that is, we don't know - either the C11 memory model is quite useless */	248	/* Why that is, we don't know - either the C11 memory model is quite useless */
208	/* for most usages, or gcc and clang have a bug */	249	/* for most usages, or gcc and clang have a bug */
209	/* I currently lean towards the latter, and inefficiently implement */	250	/* I currently lean towards the latter, and inefficiently implement */
210	/* all three of ecb's fences as a seq_cst fence */	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 */
211	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	254	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
212	#endif	255	#endif
213	#endif	256	#endif
214		257
215	#ifndef ECB_MEMORY_FENCE	258	#ifndef ECB_MEMORY_FENCE
…		…
238	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	281	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
239	#endif	282	#endif
240		283
241	/*****************************************************************************/	284	/*****************************************************************************/
242		285
243	#if __cplusplus	286	#if ECB_CPP
244	#define ecb_inline static inline	287	#define ecb_inline static inline
245	#elif ECB_GCC_VERSION(2,5)	288	#elif ECB_GCC_VERSION(2,5)
246	#define ecb_inline static __inline__	289	#define ecb_inline static __inline__
247	#elif ECB_C99	290	#elif ECB_C99
248	#define ecb_inline static inline	291	#define ecb_inline static inline
…		…
262		305
263	#define ECB_CONCAT_(a, b) a ## b	306	#define ECB_CONCAT_(a, b) a ## b
264	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	307	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
265	#define ECB_STRINGIFY_(a) # a	308	#define ECB_STRINGIFY_(a) # a
266	#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))
267		311
268	#define ecb_function_ ecb_inline	312	#define ecb_function_ ecb_inline
269		313
270	#if ECB_GCC_VERSION(3,1)	314	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
271	#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)
272	#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)
273	#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)
274	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	337	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
275	#else	338	#else
276	#define ecb_attribute(attrlist)
277	#define ecb_is_constant(expr) 0
278	#define ecb_expect(expr,value) (expr)
279	#define ecb_prefetch(addr,rw,locality)	339	#define ecb_prefetch(addr,rw,locality)
280	#endif	340	#endif
281		341
282	/* no emulation for ecb_decltype */	342	/* no emulation for ecb_decltype */
283	#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; };
284	#define ecb_decltype(x) __decltype(x)	346	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
285	#elif ECB_GCC_VERSION(3,0)	347	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
286	#define ecb_decltype(x) __typeof(x)	348	#define ecb_decltype(x) __typeof__ (x)
287	#endif	349	#endif
288		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
289	#define ecb_noinline ecb_attribute ((__noinline__))	368	#define ecb_noinline ecb_attribute ((__noinline__))
		369	#endif
		370
290	#define ecb_unused ecb_attribute ((__unused__))	371	#define ecb_unused ecb_attribute ((__unused__))
291	#define ecb_const ecb_attribute ((__const__))	372	#define ecb_const ecb_attribute ((__const__))
292	#define ecb_pure ecb_attribute ((__pure__))	373	#define ecb_pure ecb_attribute ((__pure__))
293		374
294	#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 */
295	#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)
296	#else	383	#else
297	#define ecb_noreturn ecb_attribute ((__noreturn__))	384	#define ecb_noreturn ecb_attribute ((__noreturn__))
298	#endif	385	#endif
299		386
300	#if ECB_GCC_VERSION(4,3)	387	#if ECB_GCC_VERSION(4,3)
…		…
315	/* for compatibility to the rest of the world */	402	/* for compatibility to the rest of the world */
316	#define ecb_likely(expr) ecb_expect_true (expr)	403	#define ecb_likely(expr) ecb_expect_true (expr)
317	#define ecb_unlikely(expr) ecb_expect_false (expr)	404	#define ecb_unlikely(expr) ecb_expect_false (expr)
318		405
319	/* count trailing zero bits and count # of one bits */	406	/* count trailing zero bits and count # of one bits */
320	#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))
321	/* 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 */
322	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	412	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
323	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	413	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
324	#define ecb_ctz32(x) __builtin_ctz (x)	414	#define ecb_ctz32(x) __builtin_ctz (x)
325	#define ecb_ctz64(x) __builtin_ctzll (x)	415	#define ecb_ctz64(x) __builtin_ctzll (x)
326	#define ecb_popcount32(x) __builtin_popcount (x)	416	#define ecb_popcount32(x) __builtin_popcount (x)
327	/* no popcountll */	417	/* no popcountll */
328	#else	418	#else
329	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	419	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
330	ecb_function_ int	420	ecb_function_ ecb_const int
331	ecb_ctz32 (uint32_t x)	421	ecb_ctz32 (uint32_t x)
332	{	422	{
333	int r = 0;	423	int r = 0;
334		424
335	x &= ~x + 1; /* this isolates the lowest bit */	425	x &= ~x + 1; /* this isolates the lowest bit */
…		…
349	#endif	439	#endif
350		440
351	return r;	441	return r;
352	}	442	}
353		443
354	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	444	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
355	ecb_function_ int	445	ecb_function_ ecb_const int
356	ecb_ctz64 (uint64_t x)	446	ecb_ctz64 (uint64_t x)
357	{	447	{
358	int shift = x & 0xffffffffU ? 0 : 32;	448	int shift = x & 0xffffffffU ? 0 : 32;
359	return ecb_ctz32 (x >> shift) + shift;	449	return ecb_ctz32 (x >> shift) + shift;
360	}	450	}
361		451
362	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	452	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
363	ecb_function_ int	453	ecb_function_ ecb_const int
364	ecb_popcount32 (uint32_t x)	454	ecb_popcount32 (uint32_t x)
365	{	455	{
366	x -= (x >> 1) & 0x55555555;	456	x -= (x >> 1) & 0x55555555;
367	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	457	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
368	x = ((x >> 4) + x) & 0x0f0f0f0f;	458	x = ((x >> 4) + x) & 0x0f0f0f0f;
369	x *= 0x01010101;	459	x *= 0x01010101;
370		460
371	return x >> 24;	461	return x >> 24;
372	}	462	}
373		463
374	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	464	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
375	ecb_function_ int ecb_ld32 (uint32_t x)	465	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
376	{	466	{
377	int r = 0;	467	int r = 0;
378		468
379	if (x >> 16) { x >>= 16; r += 16; }	469	if (x >> 16) { x >>= 16; r += 16; }
380	if (x >> 8) { x >>= 8; r += 8; }	470	if (x >> 8) { x >>= 8; r += 8; }
…		…
383	if (x >> 1) { r += 1; }	473	if (x >> 1) { r += 1; }
384		474
385	return r;	475	return r;
386	}	476	}
387		477
388	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	478	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
389	ecb_function_ int ecb_ld64 (uint64_t x)	479	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
390	{	480	{
391	int r = 0;	481	int r = 0;
392		482
393	if (x >> 32) { x >>= 32; r += 32; }	483	if (x >> 32) { x >>= 32; r += 32; }
394		484
395	return r + ecb_ld32 (x);	485	return r + ecb_ld32 (x);
396	}	486	}
397	#endif	487	#endif
398		488
399	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);
400	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)); }
401	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);
402	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)); }
403		493
404	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	494	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
405	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	495	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
406	{	496	{
407	return ( (x * 0x0802U & 0x22110U)	497	return ( (x * 0x0802U & 0x22110U)
408	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	498	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
409	}	499	}
410		500
411	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	501	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
412	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	502	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
413	{	503	{
414	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	504	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
415	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	505	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
416	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	506	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
417	x = ( x >> 8 ) \| ( x << 8);	507	x = ( x >> 8 ) \| ( x << 8);
418		508
419	return x;	509	return x;
420	}	510	}
421		511
422	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	512	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
423	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	513	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
424	{	514	{
425	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	515	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
426	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	516	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
427	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	517	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
428	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	518	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
431	return x;	521	return x;
432	}	522	}
433		523
434	/* popcount64 is only available on 64 bit cpus as gcc builtin */	524	/* popcount64 is only available on 64 bit cpus as gcc builtin */
435	/* so for this version we are lazy */	525	/* so for this version we are lazy */
436	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	526	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
437	ecb_function_ int	527	ecb_function_ ecb_const int
438	ecb_popcount64 (uint64_t x)	528	ecb_popcount64 (uint64_t x)
439	{	529	{
440	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	530	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
441	}	531	}
442		532
443	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);
444	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);
445	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);
446	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);
447	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);
448	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);
449	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);
450	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);
451		541
452	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); }
453	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); }
454	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); }
455	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); }
456	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); }
457	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); }
458	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); }
459	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); }
460		550
461	#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
462	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	555	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		556	#endif
463	#define ecb_bswap32(x) __builtin_bswap32 (x)	557	#define ecb_bswap32(x) __builtin_bswap32 (x)
464	#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)))
465	#else	564	#else
466	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	565	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
467	ecb_function_ uint16_t	566	ecb_function_ ecb_const uint16_t
468	ecb_bswap16 (uint16_t x)	567	ecb_bswap16 (uint16_t x)
469	{	568	{
470	return ecb_rotl16 (x, 8);	569	return ecb_rotl16 (x, 8);
471	}	570	}
472		571
473	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	572	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
474	ecb_function_ uint32_t	573	ecb_function_ ecb_const uint32_t
475	ecb_bswap32 (uint32_t x)	574	ecb_bswap32 (uint32_t x)
476	{	575	{
477	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	576	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
478	}	577	}
479		578
480	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	579	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
481	ecb_function_ uint64_t	580	ecb_function_ ecb_const uint64_t
482	ecb_bswap64 (uint64_t x)	581	ecb_bswap64 (uint64_t x)
483	{	582	{
484	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	583	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
485	}	584	}
486	#endif	585	#endif
487		586
488	#if ECB_GCC_VERSION(4,5)	587	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
489	#define ecb_unreachable() __builtin_unreachable ()	588	#define ecb_unreachable() __builtin_unreachable ()
490	#else	589	#else
491	/* 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 :/ */
492	ecb_inline void ecb_unreachable (void) ecb_noreturn;	591	ecb_inline ecb_noreturn void ecb_unreachable (void);
493	ecb_inline void ecb_unreachable (void) { }	592	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
494	#endif	593	#endif
495		594
496	/* try to tell the compiler that some condition is definitely true */	595	/* try to tell the compiler that some condition is definitely true */
497	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	596	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
498		597
499	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	598	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
500	ecb_inline unsigned char	599	ecb_inline ecb_const unsigned char
501	ecb_byteorder_helper (void)	600	ecb_byteorder_helper (void)
502	{	601	{
503	/* the union code still generates code under pressure in gcc, */	602	/* the union code still generates code under pressure in gcc, */
504	/* but less than using pointers, and always seems to */	603	/* but less than using pointers, and always seems to */
505	/* successfully return a constant. */	604	/* successfully return a constant. */
506	/* the reason why we have this horrible preprocessor mess */	605	/* the reason why we have this horrible preprocessor mess */
507	/* is to avoid it in all cases, at least on common architectures */	606	/* is to avoid it in all cases, at least on common architectures */
508	/* or when using a recent enough gcc version (>= 4.6) */	607	/* or when using a recent enough gcc version (>= 4.6) */
509	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	608	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
510	return 0x44;	609	return 0x44;
511	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	610	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
512	return 0x44;	611	return 0x44;
513	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	612	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
514	return 0x11;	613	return 0x11;
…		…
520	} u = { 0x11223344 };	619	} u = { 0x11223344 };
521	return u.c;	620	return u.c;
522	#endif	621	#endif
523	}	622	}
524		623
525	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	624	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
526	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; }
527	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	626	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
528	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; }
529		628
530	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	629	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
531	#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))
532	#else	631	#else
533	#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)))
534	#endif	633	#endif
535		634
536	#if __cplusplus	635	#if ECB_CPP
537	template<typename T>	636	template<typename T>
538	static inline T ecb_div_rd (T val, T div)	637	static inline T ecb_div_rd (T val, T div)
539	{	638	{
540	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	639	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
541	}	640	}
…		…
565		664
566	/* basically, everything uses "ieee pure-endian" floating point numbers */	665	/* basically, everything uses "ieee pure-endian" floating point numbers */
567	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	666	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
568	#if 0 \	667	#if 0 \
569	\|\| __i386 \|\| __i386__ \	668	\|\| __i386 \|\| __i386__ \
570	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	669	\|\| ECB_GCC_AMD64 \
571	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	670	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
572	\|\| defined __arm__ && defined __ARM_EABI__ \
573	\|\| defined __s390__ \|\| defined __s390x__ \	671	\|\| defined __s390__ \|\| defined __s390x__ \
574	\|\| defined __mips__ \	672	\|\| defined __mips__ \
575	\|\| defined __alpha__ \	673	\|\| defined __alpha__ \
576	\|\| defined __hppa__ \	674	\|\| defined __hppa__ \
577	\|\| defined __ia64__ \	675	\|\| defined __ia64__ \
578	\|\| defined __m68k__ \	676	\|\| defined __m68k__ \
579	\|\| defined __m88k__ \	677	\|\| defined __m88k__ \
580	\|\| defined __sh__ \	678	\|\| defined __sh__ \
581	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	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__
582	#define ECB_STDFP 1	682	#define ECB_STDFP 1
583	#include <string.h> /* for memcpy */	683	#include <string.h> /* for memcpy */
584	#else	684	#else
585	#define ECB_STDFP 0	685	#define ECB_STDFP 0
586	#endif	686	#endif
587		687
588	#ifndef ECB_NO_LIBM	688	#ifndef ECB_NO_LIBM
589		689
590	#include <math.h> /* for frexp, ldexp */	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
		697	#endif
		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
591		712
592	/* converts an ieee half/binary16 to a float */	713	/* converts an ieee half/binary16 to a float */
593	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;	714	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
594	ecb_function_ float	715	ecb_function_ ecb_const float
595	ecb_binary16_to_float (uint16_t x)	716	ecb_binary16_to_float (uint16_t x)
596	{	717	{
597	int e = (x >> 10) & 0x1f;	718	int e = (x >> 10) & 0x1f;
598	int m = x & 0x3ff;	719	int m = x & 0x3ff;
599	float r;	720	float r;
600		721
601	if (!e)	722	if (!e ) r = ecb_ldexpf (m , -24);
602	r = ldexpf (m , -24);
603	else if (e != 31)
604	r = ldexpf (m + 0x400, e - 25);	723	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
605	else if (m)	724	else if (m ) r = ECB_NAN;
606	#ifdef NAN	725	else r = ECB_INFINITY;
607	r = NAN;
608	#endif
609	else
610	r = INFINITY;
611		726
612	return x & 0x8000 ? -r : r;	727	return x & 0x8000 ? -r : r;
613	}	728	}
614		729
615	/* convert a float to ieee single/binary32 */	730	/* convert a float to ieee single/binary32 */
616	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	731	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
617	ecb_function_ uint32_t	732	ecb_function_ ecb_const uint32_t
618	ecb_float_to_binary32 (float x)	733	ecb_float_to_binary32 (float x)
619	{	734	{
620	uint32_t r;	735	uint32_t r;
621		736
622	#if ECB_STDFP	737	#if ECB_STDFP
…		…
629	if (x == 0e0f ) return 0x00000000U;	744	if (x == 0e0f ) return 0x00000000U;
630	if (x > +3.40282346638528860e+38f) return 0x7f800000U;	745	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
631	if (x < -3.40282346638528860e+38f) return 0xff800000U;	746	if (x < -3.40282346638528860e+38f) return 0xff800000U;
632	if (x != x ) return 0x7fbfffffU;	747	if (x != x ) return 0x7fbfffffU;
633		748
634	m = frexpf (x, &e) * 0x1000000U;	749	m = ecb_frexpf (x, &e) * 0x1000000U;
635		750
636	r = m & 0x80000000U;	751	r = m & 0x80000000U;
637		752
638	if (r)	753	if (r)
639	m = -m;	754	m = -m;
…		…
651		766
652	return r;	767	return r;
653	}	768	}
654		769
655	/* converts an ieee single/binary32 to a float */	770	/* converts an ieee single/binary32 to a float */
656	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	771	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
657	ecb_function_ float	772	ecb_function_ ecb_const float
658	ecb_binary32_to_float (uint32_t x)	773	ecb_binary32_to_float (uint32_t x)
659	{	774	{
660	float r;	775	float r;
661		776
662	#if ECB_STDFP	777	#if ECB_STDFP
…		…
672	x \|= 0x800000U;	787	x \|= 0x800000U;
673	else	788	else
674	e = 1;	789	e = 1;
675		790
676	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	791	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
677	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	792	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
678		793
679	r = neg ? -r : r;	794	r = neg ? -r : r;
680	#endif	795	#endif
681		796
682	return r;	797	return r;
683	}	798	}
684		799
685	/* convert a double to ieee double/binary64 */	800	/* convert a double to ieee double/binary64 */
686	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	801	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
687	ecb_function_ uint64_t	802	ecb_function_ ecb_const uint64_t
688	ecb_double_to_binary64 (double x)	803	ecb_double_to_binary64 (double x)
689	{	804	{
690	uint64_t r;	805	uint64_t r;
691		806
692	#if ECB_STDFP	807	#if ECB_STDFP
…		…
721		836
722	return r;	837	return r;
723	}	838	}
724		839
725	/* converts an ieee double/binary64 to a double */	840	/* converts an ieee double/binary64 to a double */
726	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	841	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
727	ecb_function_ double	842	ecb_function_ ecb_const double
728	ecb_binary64_to_double (uint64_t x)	843	ecb_binary64_to_double (uint64_t x)
729	{	844	{
730	double r;	845	double r;
731		846
732	#if ECB_STDFP	847	#if ECB_STDFP

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Comparing libecb/ecb.h (file contents): Revision 1.120 by root, Sat Oct 26 09:13:54 2013 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 1.120 by root, Sat Oct 26 09:13:54 2013 UTC vs.
Revision 1.164 by root, Mon Apr 20 20:06:30 2015 UTC