[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 1.152 by root, Wed Feb 11 19:12:42 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;
…		…
64	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
65	#endif	76	#endif
66	#endif	77	#endif
67		78
68	/* work around x32 idiocy by defining proper macros */	79	/* work around x32 idiocy by defining proper macros */
69	#if __x86_64 \|\| _M_AMD64	80	#if __amd64 \|\| __x86_64 \|\| _M_AMD64 \|\| _M_X64
70	#if _ILP32	81	#if _ILP32
71	#define ECB_AMD64_X32 1	82	#define ECB_AMD64_X32 1
72	#else	83	#else
73	#define ECB_AMD64 1	84	#define ECB_AMD64 1
74	#endif	85	#endif
…		…
79	* causing enormous grief in return for some better fake benchmark numbers.	90	* causing enormous grief in return for some better fake benchmark numbers.
80	* or so.	91	* or so.
81	* 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
82	* 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.
83	*/	94	*/
84	#ifndef ECB_GCC_VERSION
85	#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__
86	#define ECB_GCC_VERSION(major,minor) 0	96	#define ECB_GCC_VERSION(major,minor) 0
87	#else	97	#else
88	#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)))
89	#endif	99	#endif
90	#endif
91		100
92	#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)))
93	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	102
94	#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
95	#define ECB_CPP (__cplusplus+0)	115	#define ECB_CPP (__cplusplus+0)
96	#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)
97		128
98	#if ECB_CPP	129	#if ECB_CPP
99	#define ECB_EXTERN_C extern "C"	130	#define ECB_EXTERN_C extern "C"
100	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	131	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101	#define ECB_EXTERN_C_END }	132	#define ECB_EXTERN_C_END }
…		…
134	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	165	\|\| 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")	166	#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__ \	167	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
137	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	168	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
138	#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")
139	#elif __sparc \|\| __sparc__	172	#elif (__sparc \|\| __sparc__) && !__sparcv8
140	#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")
141	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	174	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	175	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
143	#elif defined __s390__ \|\| defined __s390x__	176	#elif defined __s390__ \|\| defined __s390x__
144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
…		…
165		198
166	#ifndef ECB_MEMORY_FENCE	199	#ifndef ECB_MEMORY_FENCE
167	#if ECB_GCC_VERSION(4,7)	200	#if ECB_GCC_VERSION(4,7)
168	/* see comment below (stdatomic.h) about the C11 memory model. */	201	/* see comment below (stdatomic.h) about the C11 memory model. */
169	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	202	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		203	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		204	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
170		205
171	/* The __has_feature syntax from clang is so misdesigned that we cannot use it	206	#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.	207	/* see comment below (stdatomic.h) about the C11 memory model. */
177	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	208	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
178	*/	209	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		210	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
179		211
180	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	212	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
181	#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()
182	#elif _MSC_VER >= 1400 /* VC++ 2005 */	220	#elif _MSC_VER >= 1400 /* VC++ 2005 */
183	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	221	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
184	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	222	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
185	#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 */
186	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	224	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
206	/* 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. */
207	/* 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 */
208	/* for most usages, or gcc and clang have a bug */	246	/* for most usages, or gcc and clang have a bug */
209	/* I currently lean towards the latter, and inefficiently implement */	247	/* I currently lean towards the latter, and inefficiently implement */
210	/* 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 */
211	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	251	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
212	#endif	252	#endif
213	#endif	253	#endif
214		254
215	#ifndef ECB_MEMORY_FENCE	255	#ifndef ECB_MEMORY_FENCE
…		…
238	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	278	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
239	#endif	279	#endif
240		280
241	/*****************************************************************************/	281	/*****************************************************************************/
242		282
243	#if __cplusplus	283	#if ECB_CPP
244	#define ecb_inline static inline	284	#define ecb_inline static inline
245	#elif ECB_GCC_VERSION(2,5)	285	#elif ECB_GCC_VERSION(2,5)
246	#define ecb_inline static __inline__	286	#define ecb_inline static __inline__
247	#elif ECB_C99	287	#elif ECB_C99
248	#define ecb_inline static inline	288	#define ecb_inline static inline
…		…
265	#define ECB_STRINGIFY_(a) # a	305	#define ECB_STRINGIFY_(a) # a
266	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	306	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
267		307
268	#define ecb_function_ ecb_inline	308	#define ecb_function_ ecb_inline
269		309
270	#if ECB_GCC_VERSION(3,1)	310	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
271	#define ecb_attribute(attrlist) __attribute__(attrlist)	311	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		312	#else
		313	#define ecb_attribute(attrlist)
		314	#endif
		315
		316	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
272	#define ecb_is_constant(expr) __builtin_constant_p (expr)	317	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		318	#else
		319	/* possible C11 impl for integral types
		320	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		321	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		322
		323	#define ecb_is_constant(expr) 0
		324	#endif
		325
		326	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
273	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	327	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		328	#else
		329	#define ecb_expect(expr,value) (expr)
		330	#endif
		331
		332	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
274	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	333	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
275	#else	334	#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)	335	#define ecb_prefetch(addr,rw,locality)
280	#endif	336	#endif
281		337
282	/* no emulation for ecb_decltype */	338	/* no emulation for ecb_decltype */
283	#if ECB_GCC_VERSION(4,5)	339	#if ECB_CPP11
		340	// older implementations might have problems with decltype(x)::type, work around it
		341	template<class T> struct ecb_decltype_t { typedef T type; };
284	#define ecb_decltype(x) __decltype(x)	342	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
285	#elif ECB_GCC_VERSION(3,0)	343	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
286	#define ecb_decltype(x) __typeof(x)	344	#define ecb_decltype(x) __typeof__ (x)
		345	#endif
		346
		347	#if _MSC_VER >= 1300
		348	#define ecb_deprecated __declspec (deprecated)
		349	#else
		350	#define ecb_deprecated ecb_attribute ((__deprecated__))
287	#endif	351	#endif
288		352
289	#define ecb_noinline ecb_attribute ((__noinline__))	353	#define ecb_noinline ecb_attribute ((__noinline__))
290	#define ecb_unused ecb_attribute ((__unused__))	354	#define ecb_unused ecb_attribute ((__unused__))
291	#define ecb_const ecb_attribute ((__const__))	355	#define ecb_const ecb_attribute ((__const__))
292	#define ecb_pure ecb_attribute ((__pure__))	356	#define ecb_pure ecb_attribute ((__pure__))
293		357
294	#if ECB_C11	358	/* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
		359	#if ECB_C11 \|\| __IBMC_NORETURN
		360	/* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
295	#define ecb_noreturn _Noreturn	361	#define ecb_noreturn _Noreturn
296	#else	362	#else
297	#define ecb_noreturn ecb_attribute ((__noreturn__))	363	#define ecb_noreturn ecb_attribute ((__noreturn__))
298	#endif	364	#endif
299		365
…		…
315	/* for compatibility to the rest of the world */	381	/* for compatibility to the rest of the world */
316	#define ecb_likely(expr) ecb_expect_true (expr)	382	#define ecb_likely(expr) ecb_expect_true (expr)
317	#define ecb_unlikely(expr) ecb_expect_false (expr)	383	#define ecb_unlikely(expr) ecb_expect_false (expr)
318		384
319	/* count trailing zero bits and count # of one bits */	385	/* count trailing zero bits and count # of one bits */
320	#if ECB_GCC_VERSION(3,4)	386	#if ECB_GCC_VERSION(3,4) \
		387	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		388	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		389	&& ECB_CLANG_BUILTIN(__builtin_popcount))
321	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	390	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
322	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	391	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
323	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	392	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
324	#define ecb_ctz32(x) __builtin_ctz (x)	393	#define ecb_ctz32(x) __builtin_ctz (x)
325	#define ecb_ctz64(x) __builtin_ctzll (x)	394	#define ecb_ctz64(x) __builtin_ctzll (x)
326	#define ecb_popcount32(x) __builtin_popcount (x)	395	#define ecb_popcount32(x) __builtin_popcount (x)
327	/* no popcountll */	396	/* no popcountll */
328	#else	397	#else
329	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	398	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
330	ecb_function_ int	399	ecb_function_ ecb_const int
331	ecb_ctz32 (uint32_t x)	400	ecb_ctz32 (uint32_t x)
332	{	401	{
333	int r = 0;	402	int r = 0;
334		403
335	x &= ~x + 1; /* this isolates the lowest bit */	404	x &= ~x + 1; /* this isolates the lowest bit */
…		…
349	#endif	418	#endif
350		419
351	return r;	420	return r;
352	}	421	}
353		422
354	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	423	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
355	ecb_function_ int	424	ecb_function_ ecb_const int
356	ecb_ctz64 (uint64_t x)	425	ecb_ctz64 (uint64_t x)
357	{	426	{
358	int shift = x & 0xffffffffU ? 0 : 32;	427	int shift = x & 0xffffffffU ? 0 : 32;
359	return ecb_ctz32 (x >> shift) + shift;	428	return ecb_ctz32 (x >> shift) + shift;
360	}	429	}
361		430
362	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	431	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
363	ecb_function_ int	432	ecb_function_ ecb_const int
364	ecb_popcount32 (uint32_t x)	433	ecb_popcount32 (uint32_t x)
365	{	434	{
366	x -= (x >> 1) & 0x55555555;	435	x -= (x >> 1) & 0x55555555;
367	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	436	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
368	x = ((x >> 4) + x) & 0x0f0f0f0f;	437	x = ((x >> 4) + x) & 0x0f0f0f0f;
369	x *= 0x01010101;	438	x *= 0x01010101;
370		439
371	return x >> 24;	440	return x >> 24;
372	}	441	}
373		442
374	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	443	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
375	ecb_function_ int ecb_ld32 (uint32_t x)	444	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
376	{	445	{
377	int r = 0;	446	int r = 0;
378		447
379	if (x >> 16) { x >>= 16; r += 16; }	448	if (x >> 16) { x >>= 16; r += 16; }
380	if (x >> 8) { x >>= 8; r += 8; }	449	if (x >> 8) { x >>= 8; r += 8; }
…		…
383	if (x >> 1) { r += 1; }	452	if (x >> 1) { r += 1; }
384		453
385	return r;	454	return r;
386	}	455	}
387		456
388	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
389	ecb_function_ int ecb_ld64 (uint64_t x)	458	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
390	{	459	{
391	int r = 0;	460	int r = 0;
392		461
393	if (x >> 32) { x >>= 32; r += 32; }	462	if (x >> 32) { x >>= 32; r += 32; }
394		463
395	return r + ecb_ld32 (x);	464	return r + ecb_ld32 (x);
396	}	465	}
397	#endif	466	#endif
398		467
399	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	468	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)); }	469	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;	470	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)); }	471	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
403		472
404	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	473	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
405	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	474	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
406	{	475	{
407	return ( (x * 0x0802U & 0x22110U)	476	return ( (x * 0x0802U & 0x22110U)
408	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	477	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
409	}	478	}
410		479
411	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	480	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
412	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	481	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
413	{	482	{
414	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	483	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
415	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	484	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
416	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	485	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
417	x = ( x >> 8 ) \| ( x << 8);	486	x = ( x >> 8 ) \| ( x << 8);
418		487
419	return x;	488	return x;
420	}	489	}
421		490
422	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	491	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
423	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	492	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
424	{	493	{
425	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	494	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
426	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	495	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
427	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	496	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
428	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	497	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
431	return x;	500	return x;
432	}	501	}
433		502
434	/* popcount64 is only available on 64 bit cpus as gcc builtin */	503	/* popcount64 is only available on 64 bit cpus as gcc builtin */
435	/* so for this version we are lazy */	504	/* so for this version we are lazy */
436	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	505	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
437	ecb_function_ int	506	ecb_function_ ecb_const int
438	ecb_popcount64 (uint64_t x)	507	ecb_popcount64 (uint64_t x)
439	{	508	{
440	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	509	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
441	}	510	}
442		511
443	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	512	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;	513	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;	514	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;	515	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;	516	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;	517	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;	518	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;	519	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
451		520
452	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	521	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); }	522	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); }	523	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); }	524	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); }	525	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); }	526	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); }	527	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); }	528	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
460		529
461	#if ECB_GCC_VERSION(4,3)	530	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
462	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	531	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
463	#define ecb_bswap32(x) __builtin_bswap32 (x)	532	#define ecb_bswap32(x) __builtin_bswap32 (x)
464	#define ecb_bswap64(x) __builtin_bswap64 (x)	533	#define ecb_bswap64(x) __builtin_bswap64 (x)
465	#else	534	#else
466	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	535	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
467	ecb_function_ uint16_t	536	ecb_function_ ecb_const uint16_t
468	ecb_bswap16 (uint16_t x)	537	ecb_bswap16 (uint16_t x)
469	{	538	{
470	return ecb_rotl16 (x, 8);	539	return ecb_rotl16 (x, 8);
471	}	540	}
472		541
473	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	542	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
474	ecb_function_ uint32_t	543	ecb_function_ ecb_const uint32_t
475	ecb_bswap32 (uint32_t x)	544	ecb_bswap32 (uint32_t x)
476	{	545	{
477	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	546	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
478	}	547	}
479		548
480	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	549	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
481	ecb_function_ uint64_t	550	ecb_function_ ecb_const uint64_t
482	ecb_bswap64 (uint64_t x)	551	ecb_bswap64 (uint64_t x)
483	{	552	{
484	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	553	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
485	}	554	}
486	#endif	555	#endif
487		556
488	#if ECB_GCC_VERSION(4,5)	557	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
489	#define ecb_unreachable() __builtin_unreachable ()	558	#define ecb_unreachable() __builtin_unreachable ()
490	#else	559	#else
491	/* this seems to work fine, but gcc always emits a warning for it :/ */	560	/* this seems to work fine, but gcc always emits a warning for it :/ */
492	ecb_inline void ecb_unreachable (void) ecb_noreturn;	561	ecb_inline ecb_noreturn void ecb_unreachable (void);
493	ecb_inline void ecb_unreachable (void) { }	562	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
494	#endif	563	#endif
495		564
496	/* try to tell the compiler that some condition is definitely true */	565	/* try to tell the compiler that some condition is definitely true */
497	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	566	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
498		567
499	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	568	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
500	ecb_inline unsigned char	569	ecb_inline ecb_const unsigned char
501	ecb_byteorder_helper (void)	570	ecb_byteorder_helper (void)
502	{	571	{
503	/* the union code still generates code under pressure in gcc, */	572	/* the union code still generates code under pressure in gcc, */
504	/* but less than using pointers, and always seems to */	573	/* but less than using pointers, and always seems to */
505	/* successfully return a constant. */	574	/* successfully return a constant. */
…		…
520	} u = { 0x11223344 };	589	} u = { 0x11223344 };
521	return u.c;	590	return u.c;
522	#endif	591	#endif
523	}	592	}
524		593
525	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	594	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
526	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	595	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;	596	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
528	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	597	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
529		598
530	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	599	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
531	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	600	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
532	#else	601	#else
533	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	602	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
534	#endif	603	#endif
535		604
536	#if __cplusplus	605	#if ECB_CPP
537	template<typename T>	606	template<typename T>
538	static inline T ecb_div_rd (T val, T div)	607	static inline T ecb_div_rd (T val, T div)
539	{	608	{
540	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	609	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
541	}	610	}
…		…
567	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	636	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
568	#if 0 \	637	#if 0 \
569	\|\| __i386 \|\| __i386__ \	638	\|\| __i386 \|\| __i386__ \
570	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	639	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \
571	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	640	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
572	\|\| defined __arm__ && defined __ARM_EABI__ \
573	\|\| defined __s390__ \|\| defined __s390x__ \	641	\|\| defined __s390__ \|\| defined __s390x__ \
574	\|\| defined __mips__ \	642	\|\| defined __mips__ \
575	\|\| defined __alpha__ \	643	\|\| defined __alpha__ \
576	\|\| defined __hppa__ \	644	\|\| defined __hppa__ \
577	\|\| defined __ia64__ \	645	\|\| defined __ia64__ \
578	\|\| defined __m68k__ \	646	\|\| defined __m68k__ \
579	\|\| defined __m88k__ \	647	\|\| defined __m88k__ \
580	\|\| defined __sh__ \	648	\|\| defined __sh__ \
581	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	649	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64 \
		650	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		651	\|\| defined __aarch64__
582	#define ECB_STDFP 1	652	#define ECB_STDFP 1
583	#include <string.h> /* for memcpy */	653	#include <string.h> /* for memcpy */
584	#else	654	#else
585	#define ECB_STDFP 0	655	#define ECB_STDFP 0
586	#endif	656	#endif
587		657
588	#ifndef ECB_NO_LIBM	658	#ifndef ECB_NO_LIBM
589		659
590	#include <math.h> /* for frexp, ldexp */	660	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		661
		662	/* only the oldest of old doesn't have this one. solaris. */
		663	#ifdef INFINITY
		664	#define ECB_INFINITY INFINITY
		665	#else
		666	#define ECB_INFINITY HUGE_VAL
		667	#endif
		668
		669	#ifdef NAN
		670	#define ECB_NAN NAN
		671	#else
		672	#define ECB_NAN ECB_INFINITY
		673	#endif
		674
		675	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		676	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		677	#else
		678	#define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
		679	#endif
591		680
592	/* converts an ieee half/binary16 to a float */	681	/* converts an ieee half/binary16 to a float */
593	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;	682	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
594	ecb_function_ float	683	ecb_function_ ecb_const float
595	ecb_binary16_to_float (uint16_t x)	684	ecb_binary16_to_float (uint16_t x)
596	{	685	{
597	int e = (x >> 10) & 0x1f;	686	int e = (x >> 10) & 0x1f;
598	int m = x & 0x3ff;	687	int m = x & 0x3ff;
599	float r;	688	float r;
600		689
601	if (!e)	690	if (!e ) r = ecb_ldexpf (m , -24);
602	r = ldexpf (m , -24);
603	else if (e != 31)
604	r = ldexpf (m + 0x400, e - 25);	691	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
605	else if (m)	692	else if (m ) r = ECB_NAN;
606	#ifdef NAN	693	else r = ECB_INFINITY;
607	r = NAN;
608	#endif
609	else
610	r = INFINITY;
611		694
612	return x & 0x8000 ? -r : r;	695	return x & 0x8000 ? -r : r;
613	}	696	}
614		697
615	/* convert a float to ieee single/binary32 */	698	/* convert a float to ieee single/binary32 */
616	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	699	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
617	ecb_function_ uint32_t	700	ecb_function_ ecb_const uint32_t
618	ecb_float_to_binary32 (float x)	701	ecb_float_to_binary32 (float x)
619	{	702	{
620	uint32_t r;	703	uint32_t r;
621		704
622	#if ECB_STDFP	705	#if ECB_STDFP
…		…
651		734
652	return r;	735	return r;
653	}	736	}
654		737
655	/* converts an ieee single/binary32 to a float */	738	/* converts an ieee single/binary32 to a float */
656	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	739	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
657	ecb_function_ float	740	ecb_function_ ecb_const float
658	ecb_binary32_to_float (uint32_t x)	741	ecb_binary32_to_float (uint32_t x)
659	{	742	{
660	float r;	743	float r;
661		744
662	#if ECB_STDFP	745	#if ECB_STDFP
…		…
672	x \|= 0x800000U;	755	x \|= 0x800000U;
673	else	756	else
674	e = 1;	757	e = 1;
675		758
676	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	759	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
677	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	760	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
678		761
679	r = neg ? -r : r;	762	r = neg ? -r : r;
680	#endif	763	#endif
681		764
682	return r;	765	return r;
683	}	766	}
684		767
685	/* convert a double to ieee double/binary64 */	768	/* convert a double to ieee double/binary64 */
686	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	769	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
687	ecb_function_ uint64_t	770	ecb_function_ ecb_const uint64_t
688	ecb_double_to_binary64 (double x)	771	ecb_double_to_binary64 (double x)
689	{	772	{
690	uint64_t r;	773	uint64_t r;
691		774
692	#if ECB_STDFP	775	#if ECB_STDFP
…		…
721		804
722	return r;	805	return r;
723	}	806	}
724		807
725	/* converts an ieee double/binary64 to a double */	808	/* converts an ieee double/binary64 to a double */
726	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	809	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
727	ecb_function_ double	810	ecb_function_ ecb_const double
728	ecb_binary64_to_double (uint64_t x)	811	ecb_binary64_to_double (uint64_t x)
729	{	812	{
730	double r;	813	double r;
731		814
732	#if ECB_STDFP	815	#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 1.152 by root, Wed Feb 11 19:12:42 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 1.152 by root, Wed Feb 11 19:12:42 2015 UTC