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

Comparing libecb/ecb.h (file contents):
Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs.
Revision 1.153 by root, Wed Feb 11 19:44:46 2015 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2013 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;
…		…
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__) && !__sparcv8	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__
…		…
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 ()
182	#elif _MSC_VER >= 1500 /* VC++ 2008 */	214	#elif _MSC_VER >= 1500 /* VC++ 2008 */
183	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */	215	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
…		…
212	/* 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. */
213	/* 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 */
214	/* for most usages, or gcc and clang have a bug */	246	/* for most usages, or gcc and clang have a bug */
215	/* I currently lean towards the latter, and inefficiently implement */	247	/* I currently lean towards the latter, and inefficiently implement */
216	/* 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 */
217	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	251	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
218	#endif	252	#endif
219	#endif	253	#endif
220		254
221	#ifndef ECB_MEMORY_FENCE	255	#ifndef ECB_MEMORY_FENCE
…		…
244	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	278	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
245	#endif	279	#endif
246		280
247	/*****************************************************************************/	281	/*****************************************************************************/
248		282
249	#if __cplusplus	283	#if ECB_CPP
250	#define ecb_inline static inline	284	#define ecb_inline static inline
251	#elif ECB_GCC_VERSION(2,5)	285	#elif ECB_GCC_VERSION(2,5)
252	#define ecb_inline static __inline__	286	#define ecb_inline static __inline__
253	#elif ECB_C99	287	#elif ECB_C99
254	#define ecb_inline static inline	288	#define ecb_inline static inline
…		…
271	#define ECB_STRINGIFY_(a) # a	305	#define ECB_STRINGIFY_(a) # a
272	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	306	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
273		307
274	#define ecb_function_ ecb_inline	308	#define ecb_function_ ecb_inline
275		309
276	#if ECB_GCC_VERSION(3,1)	310	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
277	#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)
278	#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)
279	#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)
280	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	333	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
281	#else	334	#else
282	#define ecb_attribute(attrlist)
283	#define ecb_is_constant(expr) 0
284	#define ecb_expect(expr,value) (expr)
285	#define ecb_prefetch(addr,rw,locality)	335	#define ecb_prefetch(addr,rw,locality)
286	#endif	336	#endif
287		337
288	/* no emulation for ecb_decltype */	338	/* no emulation for ecb_decltype */
289	#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; };
290	#define ecb_decltype(x) __decltype(x)	342	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
291	#elif ECB_GCC_VERSION(3,0)	343	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
292	#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__))
293	#endif	351	#endif
294		352
295	#define ecb_noinline ecb_attribute ((__noinline__))	353	#define ecb_noinline ecb_attribute ((__noinline__))
296	#define ecb_unused ecb_attribute ((__unused__))	354	#define ecb_unused ecb_attribute ((__unused__))
297	#define ecb_const ecb_attribute ((__const__))	355	#define ecb_const ecb_attribute ((__const__))
298	#define ecb_pure ecb_attribute ((__pure__))	356	#define ecb_pure ecb_attribute ((__pure__))
299		357
300	#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 */
301	#define ecb_noreturn _Noreturn	361	#define ecb_noreturn _Noreturn
		362	#elif ECB_CPP11
		363	#define ecb_noreturn [[noreturn]]
		364	#elif _MSC_VER >= 1200
		365	#define ecb_noreturn __declspec (noreturn)
302	#else	366	#else
303	#define ecb_noreturn ecb_attribute ((__noreturn__))	367	#define ecb_noreturn ecb_attribute ((__noreturn__))
304	#endif	368	#endif
305		369
306	#if ECB_GCC_VERSION(4,3)	370	#if ECB_GCC_VERSION(4,3)
…		…
321	/* for compatibility to the rest of the world */	385	/* for compatibility to the rest of the world */
322	#define ecb_likely(expr) ecb_expect_true (expr)	386	#define ecb_likely(expr) ecb_expect_true (expr)
323	#define ecb_unlikely(expr) ecb_expect_false (expr)	387	#define ecb_unlikely(expr) ecb_expect_false (expr)
324		388
325	/* count trailing zero bits and count # of one bits */	389	/* count trailing zero bits and count # of one bits */
326	#if ECB_GCC_VERSION(3,4)	390	#if ECB_GCC_VERSION(3,4) \
		391	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		392	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		393	&& ECB_CLANG_BUILTIN(__builtin_popcount))
327	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	394	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
328	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	395	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
329	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	396	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
330	#define ecb_ctz32(x) __builtin_ctz (x)	397	#define ecb_ctz32(x) __builtin_ctz (x)
331	#define ecb_ctz64(x) __builtin_ctzll (x)	398	#define ecb_ctz64(x) __builtin_ctzll (x)
332	#define ecb_popcount32(x) __builtin_popcount (x)	399	#define ecb_popcount32(x) __builtin_popcount (x)
333	/* no popcountll */	400	/* no popcountll */
334	#else	401	#else
335	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	402	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
336	ecb_function_ int	403	ecb_function_ ecb_const int
337	ecb_ctz32 (uint32_t x)	404	ecb_ctz32 (uint32_t x)
338	{	405	{
339	int r = 0;	406	int r = 0;
340		407
341	x &= ~x + 1; /* this isolates the lowest bit */	408	x &= ~x + 1; /* this isolates the lowest bit */
…		…
355	#endif	422	#endif
356		423
357	return r;	424	return r;
358	}	425	}
359		426
360	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	427	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
361	ecb_function_ int	428	ecb_function_ ecb_const int
362	ecb_ctz64 (uint64_t x)	429	ecb_ctz64 (uint64_t x)
363	{	430	{
364	int shift = x & 0xffffffffU ? 0 : 32;	431	int shift = x & 0xffffffffU ? 0 : 32;
365	return ecb_ctz32 (x >> shift) + shift;	432	return ecb_ctz32 (x >> shift) + shift;
366	}	433	}
367		434
368	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	435	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
369	ecb_function_ int	436	ecb_function_ ecb_const int
370	ecb_popcount32 (uint32_t x)	437	ecb_popcount32 (uint32_t x)
371	{	438	{
372	x -= (x >> 1) & 0x55555555;	439	x -= (x >> 1) & 0x55555555;
373	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	440	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
374	x = ((x >> 4) + x) & 0x0f0f0f0f;	441	x = ((x >> 4) + x) & 0x0f0f0f0f;
375	x *= 0x01010101;	442	x *= 0x01010101;
376		443
377	return x >> 24;	444	return x >> 24;
378	}	445	}
379		446
380	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	447	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
381	ecb_function_ int ecb_ld32 (uint32_t x)	448	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
382	{	449	{
383	int r = 0;	450	int r = 0;
384		451
385	if (x >> 16) { x >>= 16; r += 16; }	452	if (x >> 16) { x >>= 16; r += 16; }
386	if (x >> 8) { x >>= 8; r += 8; }	453	if (x >> 8) { x >>= 8; r += 8; }
…		…
389	if (x >> 1) { r += 1; }	456	if (x >> 1) { r += 1; }
390		457
391	return r;	458	return r;
392	}	459	}
393		460
394	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	461	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
395	ecb_function_ int ecb_ld64 (uint64_t x)	462	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
396	{	463	{
397	int r = 0;	464	int r = 0;
398		465
399	if (x >> 32) { x >>= 32; r += 32; }	466	if (x >> 32) { x >>= 32; r += 32; }
400		467
401	return r + ecb_ld32 (x);	468	return r + ecb_ld32 (x);
402	}	469	}
403	#endif	470	#endif
404		471
405	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	472	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
406	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	473	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
407	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	474	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
408	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	475	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
409		476
410	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	477	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
411	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	478	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
412	{	479	{
413	return ( (x * 0x0802U & 0x22110U)	480	return ( (x * 0x0802U & 0x22110U)
414	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	481	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
415	}	482	}
416		483
417	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	484	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
418	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	485	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
419	{	486	{
420	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	487	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
421	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	488	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
422	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	489	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
423	x = ( x >> 8 ) \| ( x << 8);	490	x = ( x >> 8 ) \| ( x << 8);
424		491
425	return x;	492	return x;
426	}	493	}
427		494
428	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	495	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
429	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	496	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
430	{	497	{
431	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	498	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
432	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	499	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
433	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	500	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
434	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	501	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
437	return x;	504	return x;
438	}	505	}
439		506
440	/* popcount64 is only available on 64 bit cpus as gcc builtin */	507	/* popcount64 is only available on 64 bit cpus as gcc builtin */
441	/* so for this version we are lazy */	508	/* so for this version we are lazy */
442	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	509	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
443	ecb_function_ int	510	ecb_function_ ecb_const int
444	ecb_popcount64 (uint64_t x)	511	ecb_popcount64 (uint64_t x)
445	{	512	{
446	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	513	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
447	}	514	}
448		515
449	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	516	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
450	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	517	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
451	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	518	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
452	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	519	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
453	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	520	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
454	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	521	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
455	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	522	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
456	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	523	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
457		524
458	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	525	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
459	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	526	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
460	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	527	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
461	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	528	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
462	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	529	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
463	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	530	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
464	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	531	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
465	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	532	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
466		533
467	#if ECB_GCC_VERSION(4,3)	534	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
468	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	535	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
469	#define ecb_bswap32(x) __builtin_bswap32 (x)	536	#define ecb_bswap32(x) __builtin_bswap32 (x)
470	#define ecb_bswap64(x) __builtin_bswap64 (x)	537	#define ecb_bswap64(x) __builtin_bswap64 (x)
471	#else	538	#else
472	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	539	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
473	ecb_function_ uint16_t	540	ecb_function_ ecb_const uint16_t
474	ecb_bswap16 (uint16_t x)	541	ecb_bswap16 (uint16_t x)
475	{	542	{
476	return ecb_rotl16 (x, 8);	543	return ecb_rotl16 (x, 8);
477	}	544	}
478		545
479	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	546	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
480	ecb_function_ uint32_t	547	ecb_function_ ecb_const uint32_t
481	ecb_bswap32 (uint32_t x)	548	ecb_bswap32 (uint32_t x)
482	{	549	{
483	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	550	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
484	}	551	}
485		552
486	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	553	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
487	ecb_function_ uint64_t	554	ecb_function_ ecb_const uint64_t
488	ecb_bswap64 (uint64_t x)	555	ecb_bswap64 (uint64_t x)
489	{	556	{
490	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	557	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
491	}	558	}
492	#endif	559	#endif
493		560
494	#if ECB_GCC_VERSION(4,5)	561	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
495	#define ecb_unreachable() __builtin_unreachable ()	562	#define ecb_unreachable() __builtin_unreachable ()
496	#else	563	#else
497	/* this seems to work fine, but gcc always emits a warning for it :/ */	564	/* this seems to work fine, but gcc always emits a warning for it :/ */
498	ecb_inline void ecb_unreachable (void) ecb_noreturn;	565	ecb_inline ecb_noreturn void ecb_unreachable (void);
499	ecb_inline void ecb_unreachable (void) { }	566	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
500	#endif	567	#endif
501		568
502	/* try to tell the compiler that some condition is definitely true */	569	/* try to tell the compiler that some condition is definitely true */
503	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	570	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
504		571
505	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	572	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
506	ecb_inline unsigned char	573	ecb_inline ecb_const unsigned char
507	ecb_byteorder_helper (void)	574	ecb_byteorder_helper (void)
508	{	575	{
509	/* the union code still generates code under pressure in gcc, */	576	/* the union code still generates code under pressure in gcc, */
510	/* but less than using pointers, and always seems to */	577	/* but less than using pointers, and always seems to */
511	/* successfully return a constant. */	578	/* successfully return a constant. */
…		…
526	} u = { 0x11223344 };	593	} u = { 0x11223344 };
527	return u.c;	594	return u.c;
528	#endif	595	#endif
529	}	596	}
530		597
531	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	598	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
532	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	599	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
533	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	600	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
534	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	601	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
535		602
536	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	603	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
537	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	604	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
538	#else	605	#else
539	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	606	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
540	#endif	607	#endif
541		608
542	#if __cplusplus	609	#if ECB_CPP
543	template<typename T>	610	template<typename T>
544	static inline T ecb_div_rd (T val, T div)	611	static inline T ecb_div_rd (T val, T div)
545	{	612	{
546	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	613	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
547	}	614	}
…		…
573	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	640	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
574	#if 0 \	641	#if 0 \
575	\|\| __i386 \|\| __i386__ \	642	\|\| __i386 \|\| __i386__ \
576	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	643	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \
577	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	644	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
578	\|\| defined __arm__ && defined __ARM_EABI__ \
579	\|\| defined __s390__ \|\| defined __s390x__ \	645	\|\| defined __s390__ \|\| defined __s390x__ \
580	\|\| defined __mips__ \	646	\|\| defined __mips__ \
581	\|\| defined __alpha__ \	647	\|\| defined __alpha__ \
582	\|\| defined __hppa__ \	648	\|\| defined __hppa__ \
583	\|\| defined __ia64__ \	649	\|\| defined __ia64__ \
584	\|\| defined __m68k__ \	650	\|\| defined __m68k__ \
585	\|\| defined __m88k__ \	651	\|\| defined __m88k__ \
586	\|\| defined __sh__ \	652	\|\| defined __sh__ \
587	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	653	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64 \
		654	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		655	\|\| defined __aarch64__
588	#define ECB_STDFP 1	656	#define ECB_STDFP 1
589	#include <string.h> /* for memcpy */	657	#include <string.h> /* for memcpy */
590	#else	658	#else
591	#define ECB_STDFP 0	659	#define ECB_STDFP 0
592	#endif	660	#endif
…		…
606	#define ECB_NAN NAN	674	#define ECB_NAN NAN
607	#else	675	#else
608	#define ECB_NAN ECB_INFINITY	676	#define ECB_NAN ECB_INFINITY
609	#endif	677	#endif
610		678
		679	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		680	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		681	#else
		682	#define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
		683	#endif
		684
611	/* converts an ieee half/binary16 to a float */	685	/* converts an ieee half/binary16 to a float */
612	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;	686	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
613	ecb_function_ float	687	ecb_function_ ecb_const float
614	ecb_binary16_to_float (uint16_t x)	688	ecb_binary16_to_float (uint16_t x)
615	{	689	{
616	int e = (x >> 10) & 0x1f;	690	int e = (x >> 10) & 0x1f;
617	int m = x & 0x3ff;	691	int m = x & 0x3ff;
618	float r;	692	float r;
619		693
620	if (!e ) r = ldexpf (m , -24);	694	if (!e ) r = ecb_ldexpf (m , -24);
621	else if (e != 31) r = ldexpf (m + 0x400, e - 25);	695	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
622	else if (m ) r = ECB_NAN;	696	else if (m ) r = ECB_NAN;
623	else r = ECB_INFINITY;	697	else r = ECB_INFINITY;
624		698
625	return x & 0x8000 ? -r : r;	699	return x & 0x8000 ? -r : r;
626	}	700	}
627		701
628	/* convert a float to ieee single/binary32 */	702	/* convert a float to ieee single/binary32 */
629	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	703	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
630	ecb_function_ uint32_t	704	ecb_function_ ecb_const uint32_t
631	ecb_float_to_binary32 (float x)	705	ecb_float_to_binary32 (float x)
632	{	706	{
633	uint32_t r;	707	uint32_t r;
634		708
635	#if ECB_STDFP	709	#if ECB_STDFP
…		…
664		738
665	return r;	739	return r;
666	}	740	}
667		741
668	/* converts an ieee single/binary32 to a float */	742	/* converts an ieee single/binary32 to a float */
669	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	743	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
670	ecb_function_ float	744	ecb_function_ ecb_const float
671	ecb_binary32_to_float (uint32_t x)	745	ecb_binary32_to_float (uint32_t x)
672	{	746	{
673	float r;	747	float r;
674		748
675	#if ECB_STDFP	749	#if ECB_STDFP
…		…
685	x \|= 0x800000U;	759	x \|= 0x800000U;
686	else	760	else
687	e = 1;	761	e = 1;
688		762
689	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	763	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
690	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	764	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
691		765
692	r = neg ? -r : r;	766	r = neg ? -r : r;
693	#endif	767	#endif
694		768
695	return r;	769	return r;
696	}	770	}
697		771
698	/* convert a double to ieee double/binary64 */	772	/* convert a double to ieee double/binary64 */
699	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	773	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
700	ecb_function_ uint64_t	774	ecb_function_ ecb_const uint64_t
701	ecb_double_to_binary64 (double x)	775	ecb_double_to_binary64 (double x)
702	{	776	{
703	uint64_t r;	777	uint64_t r;
704		778
705	#if ECB_STDFP	779	#if ECB_STDFP
…		…
734		808
735	return r;	809	return r;
736	}	810	}
737		811
738	/* converts an ieee double/binary64 to a double */	812	/* converts an ieee double/binary64 to a double */
739	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	813	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
740	ecb_function_ double	814	ecb_function_ ecb_const double
741	ecb_binary64_to_double (uint64_t x)	815	ecb_binary64_to_double (uint64_t x)
742	{	816	{
743	double r;	817	double r;
744		818
745	#if ECB_STDFP	819	#if ECB_STDFP

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Comparing libecb/ecb.h (file contents): Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs. Revision 1.153 by root, Wed Feb 11 19:44:46 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs.
Revision 1.153 by root, Wed Feb 11 19:44:46 2015 UTC