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

Comparing libecb/ecb.h (file contents):
Revision 1.108 by root, Fri Jun 29 01:39:51 2012 UTC vs.
Revision 1.157 by root, Fri Feb 20 17:17:26 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	/* work around x32 idiocy by defining proper macros */
		80	#if __amd64 \|\| __x86_64 \|\| _M_AMD64 \|\| _M_X64
		81	#if _ILP32
		82	#define ECB_AMD64_X32 1
		83	#else
		84	#define ECB_AMD64 1
		85	#endif
		86	#endif
		87
68	/* many compilers define _GNUC_ to some versions but then only implement	88	/* many compilers define _GNUC_ to some versions but then only implement
69	* what their idiot authors think are the "more important" extensions,	89	* what their idiot authors think are the "more important" extensions,
70	* causing enormous grief in return for some better fake benchmark numbers.	90	* causing enormous grief in return for some better fake benchmark numbers.
71	* or so.	91	* or so.
72	* we try to detect these and simply assume they are not gcc - if they have	92	* 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.	93	* an issue with that they should have done it right in the first place.
74	*/	94	*/
75	#ifndef ECB_GCC_VERSION
76	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	95	#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	96	#define ECB_GCC_VERSION(major,minor) 0
78	#else	97	#else
79	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	98	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
80	#endif	99	#endif
81	#endif
82		100
83	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	101	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
84	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	102
85	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	103	#if __clang__ && defined __has_builtin
		104	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		105	#else
		106	#define ECB_CLANG_BUILTIN(x) 0
		107	#endif
		108
		109	#if __clang__ && defined __has_extension
		110	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		111	#else
		112	#define ECB_CLANG_EXTENSION(x) 0
		113	#endif
		114
86	#define ECB_CPP (__cplusplus+0)	115	#define ECB_CPP (__cplusplus+0)
87	#define ECB_CPP11 (__cplusplus >= 201103L)	116	#define ECB_CPP11 (__cplusplus >= 201103L)
		117
		118	#if ECB_CPP
		119	#define ECB_C 0
		120	#define ECB_STDC_VERSION 0
		121	#else
		122	#define ECB_C 1
		123	#define ECB_STDC_VERSION __STDC_VERSION__
		124	#endif
		125
		126	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		127	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
88		128
89	#if ECB_CPP	129	#if ECB_CPP
90	#define ECB_EXTERN_C extern "C"	130	#define ECB_EXTERN_C extern "C"
91	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	131	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
92	#define ECB_EXTERN_C_END }	132	#define ECB_EXTERN_C_END }
…		…
125	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	165	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	166	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
127	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	167	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
128	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	168	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
129	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	169	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		170	#elif __aarch64__
		171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
130	#elif __sparc \|\| __sparc__	172	#elif (__sparc \|\| __sparc__) && !__sparcv8
131	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	173	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
132	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	174	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
133	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	175	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
134	#elif defined __s390__ \|\| defined __s390x__	176	#elif defined __s390__ \|\| defined __s390x__
135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
136	#elif defined __mips__	178	#elif defined __mips__
		179	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		180	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
137	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	181	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
138	#elif defined __alpha__	182	#elif defined __alpha__
139	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	183	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
140	#elif defined __hppa__	184	#elif defined __hppa__
141	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	186	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
143	#elif defined __ia64__	187	#elif defined __ia64__
144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")	188	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		189	#elif defined __m68k__
		190	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		191	#elif defined __m88k__
		192	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		193	#elif defined __sh__
		194	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
145	#endif	195	#endif
146	#endif	196	#endif
147	#endif	197	#endif
148		198
149	#ifndef ECB_MEMORY_FENCE	199	#ifndef ECB_MEMORY_FENCE
150	#if ECB_GCC_VERSION(4,7)	200	#if ECB_GCC_VERSION(4,7)
151	/* see comment below (stdatomic.h) about the C11 memory model. */	201	/* see comment below (stdatomic.h) about the C11 memory model. */
152	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	202	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
153	/#elif defined __clang && __has_feature (cxx_atomic)/	203	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		204	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		205
		206	#elif ECB_CLANG_EXTENSION(c_atomic)
154	/* see comment below (stdatomic.h) about the C11 memory model. */	207	/* see comment below (stdatomic.h) about the C11 memory model. */
155	/#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)/	208	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		209	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		210	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		211
156	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	212	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
157	#define ECB_MEMORY_FENCE __sync_synchronize ()	213	#define ECB_MEMORY_FENCE __sync_synchronize ()
		214	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		215	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		216	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		217	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		218	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		219	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
158	#elif _MSC_VER >= 1400 /* VC++ 2005 */	220	#elif _MSC_VER >= 1400 /* VC++ 2005 */
159	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	221	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
160	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	222	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
161	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	223	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
162	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	224	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
182	/* any fence other than seq_cst, which isn't very efficient for us. */	244	/* any fence other than seq_cst, which isn't very efficient for us. */
183	/* Why that is, we don't know - either the C11 memory model is quite useless */	245	/* Why that is, we don't know - either the C11 memory model is quite useless */
184	/* for most usages, or gcc and clang have a bug */	246	/* for most usages, or gcc and clang have a bug */
185	/* I currently lean towards the latter, and inefficiently implement */	247	/* I currently lean towards the latter, and inefficiently implement */
186	/* all three of ecb's fences as a seq_cst fence */	248	/* all three of ecb's fences as a seq_cst fence */
		249	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		250	/* for all __atomic_thread_fence's except seq_cst */
187	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	251	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
188	#endif	252	#endif
189	#endif	253	#endif
190		254
191	#ifndef ECB_MEMORY_FENCE	255	#ifndef ECB_MEMORY_FENCE
…		…
214	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	278	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
215	#endif	279	#endif
216		280
217	/*****************************************************************************/	281	/*****************************************************************************/
218		282
219	#if __cplusplus	283	#if ECB_CPP
220	#define ecb_inline static inline	284	#define ecb_inline static inline
221	#elif ECB_GCC_VERSION(2,5)	285	#elif ECB_GCC_VERSION(2,5)
222	#define ecb_inline static __inline__	286	#define ecb_inline static __inline__
223	#elif ECB_C99	287	#elif ECB_C99
224	#define ecb_inline static inline	288	#define ecb_inline static inline
…		…
238		302
239	#define ECB_CONCAT_(a, b) a ## b	303	#define ECB_CONCAT_(a, b) a ## b
240	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	304	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
241	#define ECB_STRINGIFY_(a) # a	305	#define ECB_STRINGIFY_(a) # a
242	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	306	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		307	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
243		308
244	#define ecb_function_ ecb_inline	309	#define ecb_function_ ecb_inline
245		310
246	#if ECB_GCC_VERSION(3,1)	311	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
247	#define ecb_attribute(attrlist) __attribute__(attrlist)	312	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		313	#else
		314	#define ecb_attribute(attrlist)
		315	#endif
		316
		317	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
248	#define ecb_is_constant(expr) __builtin_constant_p (expr)	318	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		319	#else
		320	/* possible C11 impl for integral types
		321	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		322	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		323
		324	#define ecb_is_constant(expr) 0
		325	#endif
		326
		327	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
249	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	328	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		329	#else
		330	#define ecb_expect(expr,value) (expr)
		331	#endif
		332
		333	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
250	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	334	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
251	#else	335	#else
252	#define ecb_attribute(attrlist)
253	#define ecb_is_constant(expr) 0
254	#define ecb_expect(expr,value) (expr)
255	#define ecb_prefetch(addr,rw,locality)	336	#define ecb_prefetch(addr,rw,locality)
256	#endif	337	#endif
257		338
258	/* no emulation for ecb_decltype */	339	/* no emulation for ecb_decltype */
259	#if ECB_GCC_VERSION(4,5)	340	#if ECB_CPP11
		341	// older implementations might have problems with decltype(x)::type, work around it
		342	template<class T> struct ecb_decltype_t { typedef T type; };
260	#define ecb_decltype(x) __decltype(x)	343	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
261	#elif ECB_GCC_VERSION(3,0)	344	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
262	#define ecb_decltype(x) __typeof(x)	345	#define ecb_decltype(x) __typeof__ (x)
263	#endif	346	#endif
264		347
		348	#if _MSC_VER >= 1300
		349	#define ecb_deprecated __declspec (deprecated)
		350	#else
		351	#define ecb_deprecated ecb_attribute ((__deprecated__))
		352	#endif
		353
		354	#if __MSC_VER >= 1500
		355	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		356	#elif ECB_GCC_VERSION(4,5)
		357	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		358	#else
		359	#define ecb_deprecated_message(msg) ecb_deprecated
		360	#endif
		361
		362	#if _MSC_VER >= 1400
		363	#define ecb_noinline __declspec (noinline)
		364	#else
265	#define ecb_noinline ecb_attribute ((__noinline__))	365	#define ecb_noinline ecb_attribute ((__noinline__))
		366	#endif
		367
266	#define ecb_unused ecb_attribute ((__unused__))	368	#define ecb_unused ecb_attribute ((__unused__))
267	#define ecb_const ecb_attribute ((__const__))	369	#define ecb_const ecb_attribute ((__const__))
268	#define ecb_pure ecb_attribute ((__pure__))	370	#define ecb_pure ecb_attribute ((__pure__))
269		371
270	#if ECB_C11	372	#if ECB_C11 \|\| __IBMC_NORETURN
		373	/* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
271	#define ecb_noreturn _Noreturn	374	#define ecb_noreturn _Noreturn
		375	#elif ECB_CPP11
		376	#define ecb_noreturn [[noreturn]]
		377	#elif _MSC_VER >= 1200
		378	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		379	#define ecb_noreturn __declspec (noreturn)
272	#else	380	#else
273	#define ecb_noreturn ecb_attribute ((__noreturn__))	381	#define ecb_noreturn ecb_attribute ((__noreturn__))
274	#endif	382	#endif
275		383
276	#if ECB_GCC_VERSION(4,3)	384	#if ECB_GCC_VERSION(4,3)
…		…
291	/* for compatibility to the rest of the world */	399	/* for compatibility to the rest of the world */
292	#define ecb_likely(expr) ecb_expect_true (expr)	400	#define ecb_likely(expr) ecb_expect_true (expr)
293	#define ecb_unlikely(expr) ecb_expect_false (expr)	401	#define ecb_unlikely(expr) ecb_expect_false (expr)
294		402
295	/* count trailing zero bits and count # of one bits */	403	/* count trailing zero bits and count # of one bits */
296	#if ECB_GCC_VERSION(3,4)	404	#if ECB_GCC_VERSION(3,4) \
		405	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		406	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		407	&& ECB_CLANG_BUILTIN(__builtin_popcount))
297	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	408	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
298	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	409	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
299	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	410	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
300	#define ecb_ctz32(x) __builtin_ctz (x)	411	#define ecb_ctz32(x) __builtin_ctz (x)
301	#define ecb_ctz64(x) __builtin_ctzll (x)	412	#define ecb_ctz64(x) __builtin_ctzll (x)
302	#define ecb_popcount32(x) __builtin_popcount (x)	413	#define ecb_popcount32(x) __builtin_popcount (x)
303	/* no popcountll */	414	/* no popcountll */
304	#else	415	#else
305	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	416	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
306	ecb_function_ int	417	ecb_function_ ecb_const int
307	ecb_ctz32 (uint32_t x)	418	ecb_ctz32 (uint32_t x)
308	{	419	{
309	int r = 0;	420	int r = 0;
310		421
311	x &= ~x + 1; /* this isolates the lowest bit */	422	x &= ~x + 1; /* this isolates the lowest bit */
…		…
325	#endif	436	#endif
326		437
327	return r;	438	return r;
328	}	439	}
329		440
330	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	441	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
331	ecb_function_ int	442	ecb_function_ ecb_const int
332	ecb_ctz64 (uint64_t x)	443	ecb_ctz64 (uint64_t x)
333	{	444	{
334	int shift = x & 0xffffffffU ? 0 : 32;	445	int shift = x & 0xffffffffU ? 0 : 32;
335	return ecb_ctz32 (x >> shift) + shift;	446	return ecb_ctz32 (x >> shift) + shift;
336	}	447	}
337		448
338	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
339	ecb_function_ int	450	ecb_function_ ecb_const int
340	ecb_popcount32 (uint32_t x)	451	ecb_popcount32 (uint32_t x)
341	{	452	{
342	x -= (x >> 1) & 0x55555555;	453	x -= (x >> 1) & 0x55555555;
343	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	454	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
344	x = ((x >> 4) + x) & 0x0f0f0f0f;	455	x = ((x >> 4) + x) & 0x0f0f0f0f;
345	x *= 0x01010101;	456	x *= 0x01010101;
346		457
347	return x >> 24;	458	return x >> 24;
348	}	459	}
349		460
350	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	461	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
351	ecb_function_ int ecb_ld32 (uint32_t x)	462	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
352	{	463	{
353	int r = 0;	464	int r = 0;
354		465
355	if (x >> 16) { x >>= 16; r += 16; }	466	if (x >> 16) { x >>= 16; r += 16; }
356	if (x >> 8) { x >>= 8; r += 8; }	467	if (x >> 8) { x >>= 8; r += 8; }
…		…
359	if (x >> 1) { r += 1; }	470	if (x >> 1) { r += 1; }
360		471
361	return r;	472	return r;
362	}	473	}
363		474
364	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	475	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
365	ecb_function_ int ecb_ld64 (uint64_t x)	476	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
366	{	477	{
367	int r = 0;	478	int r = 0;
368		479
369	if (x >> 32) { x >>= 32; r += 32; }	480	if (x >> 32) { x >>= 32; r += 32; }
370		481
371	return r + ecb_ld32 (x);	482	return r + ecb_ld32 (x);
372	}	483	}
373	#endif	484	#endif
374		485
375	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	486	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
376	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	487	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
377	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	488	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
378	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	489	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
379		490
380	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	491	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
381	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	492	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
382	{	493	{
383	return ( (x * 0x0802U & 0x22110U)	494	return ( (x * 0x0802U & 0x22110U)
384	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	495	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
385	}	496	}
386		497
387	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	498	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
388	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	499	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
389	{	500	{
390	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	501	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
391	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	502	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
392	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	503	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
393	x = ( x >> 8 ) \| ( x << 8);	504	x = ( x >> 8 ) \| ( x << 8);
394		505
395	return x;	506	return x;
396	}	507	}
397		508
398	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	509	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
399	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	510	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
400	{	511	{
401	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	512	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
402	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	513	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
403	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	514	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
404	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	515	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
407	return x;	518	return x;
408	}	519	}
409		520
410	/* popcount64 is only available on 64 bit cpus as gcc builtin */	521	/* popcount64 is only available on 64 bit cpus as gcc builtin */
411	/* so for this version we are lazy */	522	/* so for this version we are lazy */
412	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	523	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
413	ecb_function_ int	524	ecb_function_ ecb_const int
414	ecb_popcount64 (uint64_t x)	525	ecb_popcount64 (uint64_t x)
415	{	526	{
416	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	527	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
417	}	528	}
418		529
419	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	530	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
420	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	531	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
421	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	532	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
422	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	533	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
423	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	534	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
424	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	535	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
425	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	536	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
426	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	537	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
427		538
428	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	539	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
429	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	540	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
430	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	541	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
431	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	542	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
432	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	543	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
433	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	544	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
434	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	545	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
435	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	546	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
436		547
437	#if ECB_GCC_VERSION(4,3)	548	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
438	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	549	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
439	#define ecb_bswap32(x) __builtin_bswap32 (x)	550	#define ecb_bswap32(x) __builtin_bswap32 (x)
440	#define ecb_bswap64(x) __builtin_bswap64 (x)	551	#define ecb_bswap64(x) __builtin_bswap64 (x)
441	#else	552	#else
442	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	553	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
443	ecb_function_ uint16_t	554	ecb_function_ ecb_const uint16_t
444	ecb_bswap16 (uint16_t x)	555	ecb_bswap16 (uint16_t x)
445	{	556	{
446	return ecb_rotl16 (x, 8);	557	return ecb_rotl16 (x, 8);
447	}	558	}
448		559
449	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	560	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
450	ecb_function_ uint32_t	561	ecb_function_ ecb_const uint32_t
451	ecb_bswap32 (uint32_t x)	562	ecb_bswap32 (uint32_t x)
452	{	563	{
453	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	564	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
454	}	565	}
455		566
456	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	567	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
457	ecb_function_ uint64_t	568	ecb_function_ ecb_const uint64_t
458	ecb_bswap64 (uint64_t x)	569	ecb_bswap64 (uint64_t x)
459	{	570	{
460	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	571	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
461	}	572	}
462	#endif	573	#endif
463		574
464	#if ECB_GCC_VERSION(4,5)	575	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
465	#define ecb_unreachable() __builtin_unreachable ()	576	#define ecb_unreachable() __builtin_unreachable ()
466	#else	577	#else
467	/* this seems to work fine, but gcc always emits a warning for it :/ */	578	/* this seems to work fine, but gcc always emits a warning for it :/ */
468	ecb_inline void ecb_unreachable (void) ecb_noreturn;	579	ecb_inline ecb_noreturn void ecb_unreachable (void);
469	ecb_inline void ecb_unreachable (void) { }	580	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
470	#endif	581	#endif
471		582
472	/* try to tell the compiler that some condition is definitely true */	583	/* try to tell the compiler that some condition is definitely true */
473	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	584	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
474		585
475	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	586	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
476	ecb_inline unsigned char	587	ecb_inline ecb_const unsigned char
477	ecb_byteorder_helper (void)	588	ecb_byteorder_helper (void)
478	{	589	{
479	/* the union code still generates code under pressure in gcc, */	590	/* the union code still generates code under pressure in gcc, */
480	/* but less than using pointers, and always seem to */	591	/* but less than using pointers, and always seems to */
481	/* successfully return a constant. */	592	/* successfully return a constant. */
482	/* the reason why we have this horrible preprocessor mess */	593	/* the reason why we have this horrible preprocessor mess */
483	/* is to avoid it in all cases, at least on common architectures */	594	/* is to avoid it in all cases, at least on common architectures */
484	/* and yes, gcc defines __BYTE_ORDER__, g++ does not */	595	/* or when using a recent enough gcc version (>= 4.6) */
485	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	596	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64
486	return 0x44;	597	return 0x44;
487	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	598	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
488	return 0x44;	599	return 0x44;
489	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	600	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
490	retrurn 0x11;	601	return 0x11;
491	#else	602	#else
492	union	603	union
493	{	604	{
494	uint32_t i;	605	uint32_t i;
495	uint8_t c;	606	uint8_t c;
496	} u = { 0x11223344 };	607	} u = { 0x11223344 };
497	return u.c;	608	return u.c;
498	#endif	609	#endif
499	}	610	}
500		611
501	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	612	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
502	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	613	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
503	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	614	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
504	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	615	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
505		616
506	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	617	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
507	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	618	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
508	#else	619	#else
509	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	620	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
510	#endif	621	#endif
511		622
512	#if __cplusplus	623	#if ECB_CPP
513	template<typename T>	624	template<typename T>
514	static inline T ecb_div_rd (T val, T div)	625	static inline T ecb_div_rd (T val, T div)
515	{	626	{
516	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	627	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
517	}	628	}
…		…
543	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	654	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
544	#if 0 \	655	#if 0 \
545	\|\| __i386 \|\| __i386__ \	656	\|\| __i386 \|\| __i386__ \
546	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	657	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \
547	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	658	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
548	\|\| defined __arm__ && defined __ARM_EABI__ \
549	\|\| defined __s390__ \|\| defined __s390x__ \	659	\|\| defined __s390__ \|\| defined __s390x__ \
550	\|\| defined __mips__ \	660	\|\| defined __mips__ \
551	\|\| defined __alpha__ \	661	\|\| defined __alpha__ \
552	\|\| defined __hppa__ \	662	\|\| defined __hppa__ \
553	\|\| defined __ia64__ \	663	\|\| defined __ia64__ \
		664	\|\| defined __m68k__ \
		665	\|\| defined __m88k__ \
		666	\|\| defined __sh__ \
554	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	667	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64 \
		668	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		669	\|\| defined __aarch64__
555	#define ECB_STDFP 1	670	#define ECB_STDFP 1
556	#include <string.h> /* for memcpy */	671	#include <string.h> /* for memcpy */
557	#else	672	#else
558	#define ECB_STDFP 0	673	#define ECB_STDFP 0
559	#endif	674	#endif
560		675
561	#ifndef ECB_NO_LIBM	676	#ifndef ECB_NO_LIBM
562		677
		678	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		679
		680	/* only the oldest of old doesn't have this one. solaris. */
		681	#ifdef INFINITY
		682	#define ECB_INFINITY INFINITY
		683	#else
		684	#define ECB_INFINITY HUGE_VAL
		685	#endif
		686
		687	#ifdef NAN
		688	#define ECB_NAN NAN
		689	#else
		690	#define ECB_NAN ECB_INFINITY
		691	#endif
		692
		693	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		694	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		695	#else
		696	#define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
		697	#endif
		698
		699	/* converts an ieee half/binary16 to a float */
		700	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		701	ecb_function_ ecb_const float
		702	ecb_binary16_to_float (uint16_t x)
		703	{
		704	int e = (x >> 10) & 0x1f;
		705	int m = x & 0x3ff;
		706	float r;
		707
		708	if (!e ) r = ecb_ldexpf (m , -24);
		709	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
		710	else if (m ) r = ECB_NAN;
		711	else r = ECB_INFINITY;
		712
		713	return x & 0x8000 ? -r : r;
		714	}
		715
563	/* convert a float to ieee single/binary32 */	716	/* convert a float to ieee single/binary32 */
564	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	717	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
565	ecb_function_ uint32_t	718	ecb_function_ ecb_const uint32_t
566	ecb_float_to_binary32 (float x)	719	ecb_float_to_binary32 (float x)
567	{	720	{
568	uint32_t r;	721	uint32_t r;
569		722
570	#if ECB_STDFP	723	#if ECB_STDFP
571	memcpy (&r, &x, 4);	724	memcpy (&r, &x, 4);
572	#else	725	#else
573	/* slow emulation, works for anything but -0 */	726	/* slow emulation, works for anything but -0 */
574	ECB_EXTERN_C float frexpf (float v, int *e);
575	uint32_t m;	727	uint32_t m;
576	int e;	728	int e;
577		729
578	if (x == 0e0f ) return 0x00000000U;	730	if (x == 0e0f ) return 0x00000000U;
579	if (x > +3.40282346638528860e+38f) return 0x7f800000U;	731	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
…		…
600		752
601	return r;	753	return r;
602	}	754	}
603		755
604	/* converts an ieee single/binary32 to a float */	756	/* converts an ieee single/binary32 to a float */
605	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	757	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
606	ecb_function_ float	758	ecb_function_ ecb_const float
607	ecb_binary32_to_float (uint32_t x)	759	ecb_binary32_to_float (uint32_t x)
608	{	760	{
609	float r;	761	float r;
610		762
611	#if ECB_STDFP	763	#if ECB_STDFP
612	memcpy (&r, &x, 4);	764	memcpy (&r, &x, 4);
613	#else	765	#else
614	/* emulation, only works for normals and subnormals and +0 */	766	/* emulation, only works for normals and subnormals and +0 */
615	ECB_EXTERN_C float ldexpf (float x, int e);
616
617	int neg = x >> 31;	767	int neg = x >> 31;
618	int e = (x >> 23) & 0xffU;	768	int e = (x >> 23) & 0xffU;
619		769
620	x &= 0x7fffffU;	770	x &= 0x7fffffU;
621		771
…		…
623	x \|= 0x800000U;	773	x \|= 0x800000U;
624	else	774	else
625	e = 1;	775	e = 1;
626		776
627	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	777	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
628	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	778	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
629		779
630	r = neg ? -r : r;	780	r = neg ? -r : r;
631	#endif	781	#endif
632		782
633	return r;	783	return r;
634	}	784	}
635		785
636	/* convert a double to ieee double/binary64 */	786	/* convert a double to ieee double/binary64 */
637	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	787	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
638	ecb_function_ uint64_t	788	ecb_function_ ecb_const uint64_t
639	ecb_double_to_binary64 (double x)	789	ecb_double_to_binary64 (double x)
640	{	790	{
641	uint64_t r;	791	uint64_t r;
642		792
643	#if ECB_STDFP	793	#if ECB_STDFP
644	memcpy (&r, &x, 8);	794	memcpy (&r, &x, 8);
645	#else	795	#else
646	/* slow emulation, works for anything but -0 */	796	/* slow emulation, works for anything but -0 */
647	ECB_EXTERN_C double frexp (double v, int *e);
648	uint64_t m;	797	uint64_t m;
649	int e;	798	int e;
650		799
651	if (x == 0e0 ) return 0x0000000000000000U;	800	if (x == 0e0 ) return 0x0000000000000000U;
652	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;	801	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
…		…
673		822
674	return r;	823	return r;
675	}	824	}
676		825
677	/* converts an ieee double/binary64 to a double */	826	/* converts an ieee double/binary64 to a double */
678	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	827	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
679	ecb_function_ double	828	ecb_function_ ecb_const double
680	ecb_binary64_to_double (uint64_t x)	829	ecb_binary64_to_double (uint64_t x)
681	{	830	{
682	double r;	831	double r;
683		832
684	#if ECB_STDFP	833	#if ECB_STDFP
685	memcpy (&r, &x, 8);	834	memcpy (&r, &x, 8);
686	#else	835	#else
687	/* emulation, only works for normals and subnormals and +0 */	836	/* emulation, only works for normals and subnormals and +0 */
688	ECB_EXTERN_C double ldexp (double x, int e);
689
690	int neg = x >> 63;	837	int neg = x >> 63;
691	int e = (x >> 52) & 0x7ffU;	838	int e = (x >> 52) & 0x7ffU;
692		839
693	x &= 0xfffffffffffffU;	840	x &= 0xfffffffffffffU;
694		841

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Comparing libecb/ecb.h (file contents): Revision 1.108 by root, Fri Jun 29 01:39:51 2012 UTC vs. Revision 1.157 by root, Fri Feb 20 17:17:26 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.108 by root, Fri Jun 29 01:39:51 2012 UTC vs.
Revision 1.157 by root, Fri Feb 20 17:17:26 2015 UTC