[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 1.172 by root, Tue Nov 24 22:12:00 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 0x00010005
35		46
36	#ifdef _WIN32	47	#ifdef _WIN32
37	typedef signed char int8_t;	48	typedef signed char int8_t;
38	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
39	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
63	#else	74	#else
64	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
65	#endif	76	#endif
66	#endif	77	#endif
67		78
		79	#define ECB_GCC_AMD64 (__amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__)
		80	#define ECB_MSVC_AMD64 (_M_AMD64 \|\| _M_X64)
		81
68	/* work around x32 idiocy by defining proper macros */	82	/* work around x32 idiocy by defining proper macros */
69	#if __x86_64 \|\| _M_AMD64	83	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
70	#if _ILP32	84	#if _ILP32
71	#define ECB_AMD64_X32 1	85	#define ECB_AMD64_X32 1
72	#else	86	#else
73	#define ECB_AMD64 1	87	#define ECB_AMD64 1
74	#endif	88	#endif
…		…
79	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
80	* or so.	94	* or so.
81	* we try to detect these and simply assume they are not gcc - if they have	95	* we try to detect these and simply assume they are not gcc - if they have
82	* an issue with that they should have done it right in the first place.	96	* an issue with that they should have done it right in the first place.
83	*/	97	*/
84	#ifndef ECB_GCC_VERSION
85	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	98	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
86	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
87	#else	100	#else
88	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	101	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
89	#endif	102	#endif
90	#endif
91		103
92	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	104	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
93	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
94	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	106	#if __clang__ && defined __has_builtin
		107	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		108	#else
		109	#define ECB_CLANG_BUILTIN(x) 0
		110	#endif
		111
		112	#if __clang__ && defined __has_extension
		113	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		114	#else
		115	#define ECB_CLANG_EXTENSION(x) 0
		116	#endif
		117
95	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
96	#define ECB_CPP11 (__cplusplus >= 201103L)	119	#define ECB_CPP11 (__cplusplus >= 201103L)
		120
		121	#if ECB_CPP
		122	#define ECB_C 0
		123	#define ECB_STDC_VERSION 0
		124	#else
		125	#define ECB_C 1
		126	#define ECB_STDC_VERSION __STDC_VERSION__
		127	#endif
		128
		129	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		130	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
97		131
98	#if ECB_CPP	132	#if ECB_CPP
99	#define ECB_EXTERN_C extern "C"	133	#define ECB_EXTERN_C extern "C"
100	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101	#define ECB_EXTERN_C_END }	135	#define ECB_EXTERN_C_END }
…		…
114	#define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
115	#endif	149	#endif
116		150
117	#if ECB_NO_SMP	151	#if ECB_NO_SMP
118	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
		153	#endif
		154
		155	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		156	#if __xlC__ && ECB_CPP
		157	#include <builtins.h>
		158	#endif
		159
		160	#if 1400 <= _MSC_VER
		161	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
119	#endif	162	#endif
120		163
121	#ifndef ECB_MEMORY_FENCE	164	#ifndef ECB_MEMORY_FENCE
122	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	165	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
123	#if __i386 \|\| __i386__	166	#if __i386 \|\| __i386__
124	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
125	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
126	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
127	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	170	#elif ECB_GCC_AMD64
128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
129	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	172	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
130	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	173	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
131	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	174	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	175	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
…		…
134	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	177	\|\| 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")	178	#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__ \	179	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
137	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	180	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
138	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	181	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
139	#elif __sparc \|\| __sparc__	182	#elif __aarch64__
		183	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		184	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
140	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
141	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	186	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	187	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
143	#elif defined __s390__ \|\| defined __s390x__	188	#elif defined __s390__ \|\| defined __s390x__
144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	189	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
…		…
165		210
166	#ifndef ECB_MEMORY_FENCE	211	#ifndef ECB_MEMORY_FENCE
167	#if ECB_GCC_VERSION(4,7)	212	#if ECB_GCC_VERSION(4,7)
168	/* see comment below (stdatomic.h) about the C11 memory model. */	213	/* see comment below (stdatomic.h) about the C11 memory model. */
169	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	214	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		215	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		216	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
170		217
171	/* The __has_feature syntax from clang is so misdesigned that we cannot use it	218	#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.	219	/* see comment below (stdatomic.h) about the C11 memory model. */
177	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	220	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
178	*/	221	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		222	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
179		223
180	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	224	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
181	#define ECB_MEMORY_FENCE __sync_synchronize ()	225	#define ECB_MEMORY_FENCE __sync_synchronize ()
		226	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		227	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		228	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		229	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		230	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		231	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
182	#elif _MSC_VER >= 1400 /* VC++ 2005 */	232	#elif _MSC_VER >= 1400 /* VC++ 2005 */
183	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	233	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
184	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	234	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
185	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	235	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
186	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	236	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
206	/* any fence other than seq_cst, which isn't very efficient for us. */	256	/* 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 */	257	/* 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 */	258	/* for most usages, or gcc and clang have a bug */
209	/* I currently lean towards the latter, and inefficiently implement */	259	/* I currently lean towards the latter, and inefficiently implement */
210	/* all three of ecb's fences as a seq_cst fence */	260	/* all three of ecb's fences as a seq_cst fence */
		261	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		262	/* for all __atomic_thread_fence's except seq_cst */
211	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	263	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
212	#endif	264	#endif
213	#endif	265	#endif
214		266
215	#ifndef ECB_MEMORY_FENCE	267	#ifndef ECB_MEMORY_FENCE
…		…
238	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	290	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
239	#endif	291	#endif
240		292
241	/*****************************************************************************/	293	/*****************************************************************************/
242		294
243	#if __cplusplus	295	#if ECB_CPP
244	#define ecb_inline static inline	296	#define ecb_inline static inline
245	#elif ECB_GCC_VERSION(2,5)	297	#elif ECB_GCC_VERSION(2,5)
246	#define ecb_inline static __inline__	298	#define ecb_inline static __inline__
247	#elif ECB_C99	299	#elif ECB_C99
248	#define ecb_inline static inline	300	#define ecb_inline static inline
…		…
262		314
263	#define ECB_CONCAT_(a, b) a ## b	315	#define ECB_CONCAT_(a, b) a ## b
264	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	316	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
265	#define ECB_STRINGIFY_(a) # a	317	#define ECB_STRINGIFY_(a) # a
266	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	318	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		319	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
267		320
268	#define ecb_function_ ecb_inline	321	#define ecb_function_ ecb_inline
269		322
270	#if ECB_GCC_VERSION(3,1)	323	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
271	#define ecb_attribute(attrlist) __attribute__(attrlist)	324	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		325	#else
		326	#define ecb_attribute(attrlist)
		327	#endif
		328
		329	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
272	#define ecb_is_constant(expr) __builtin_constant_p (expr)	330	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		331	#else
		332	/* possible C11 impl for integral types
		333	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		334	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		335
		336	#define ecb_is_constant(expr) 0
		337	#endif
		338
		339	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
273	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	340	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		341	#else
		342	#define ecb_expect(expr,value) (expr)
		343	#endif
		344
		345	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
274	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	346	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
275	#else	347	#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)	348	#define ecb_prefetch(addr,rw,locality)
280	#endif	349	#endif
281		350
282	/* no emulation for ecb_decltype */	351	/* no emulation for ecb_decltype */
283	#if ECB_GCC_VERSION(4,5)	352	#if ECB_CPP11
		353	// older implementations might have problems with decltype(x)::type, work around it
		354	template<class T> struct ecb_decltype_t { typedef T type; };
284	#define ecb_decltype(x) __decltype(x)	355	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
285	#elif ECB_GCC_VERSION(3,0)	356	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
286	#define ecb_decltype(x) __typeof(x)	357	#define ecb_decltype(x) __typeof__ (x)
287	#endif	358	#endif
288		359
		360	#if _MSC_VER >= 1300
		361	#define ecb_deprecated __declspec (deprecated)
		362	#else
		363	#define ecb_deprecated ecb_attribute ((__deprecated__))
		364	#endif
		365
		366	#if _MSC_VER >= 1500
		367	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		368	#elif ECB_GCC_VERSION(4,5)
		369	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		370	#else
		371	#define ecb_deprecated_message(msg) ecb_deprecated
		372	#endif
		373
		374	#if _MSC_VER >= 1400
		375	#define ecb_noinline __declspec (noinline)
		376	#else
289	#define ecb_noinline ecb_attribute ((__noinline__))	377	#define ecb_noinline ecb_attribute ((__noinline__))
		378	#endif
		379
290	#define ecb_unused ecb_attribute ((__unused__))	380	#define ecb_unused ecb_attribute ((__unused__))
291	#define ecb_const ecb_attribute ((__const__))	381	#define ecb_const ecb_attribute ((__const__))
292	#define ecb_pure ecb_attribute ((__pure__))	382	#define ecb_pure ecb_attribute ((__pure__))
293		383
294	#if ECB_C11	384	#if ECB_C11 \|\| __IBMC_NORETURN
		385	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
295	#define ecb_noreturn _Noreturn	386	#define ecb_noreturn _Noreturn
		387	#elif ECB_CPP11
		388	#define ecb_noreturn [[noreturn]]
		389	#elif _MSC_VER >= 1200
		390	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		391	#define ecb_noreturn __declspec (noreturn)
296	#else	392	#else
297	#define ecb_noreturn ecb_attribute ((__noreturn__))	393	#define ecb_noreturn ecb_attribute ((__noreturn__))
298	#endif	394	#endif
299		395
300	#if ECB_GCC_VERSION(4,3)	396	#if ECB_GCC_VERSION(4,3)
…		…
315	/* for compatibility to the rest of the world */	411	/* for compatibility to the rest of the world */
316	#define ecb_likely(expr) ecb_expect_true (expr)	412	#define ecb_likely(expr) ecb_expect_true (expr)
317	#define ecb_unlikely(expr) ecb_expect_false (expr)	413	#define ecb_unlikely(expr) ecb_expect_false (expr)
318		414
319	/* count trailing zero bits and count # of one bits */	415	/* count trailing zero bits and count # of one bits */
320	#if ECB_GCC_VERSION(3,4)	416	#if ECB_GCC_VERSION(3,4) \
		417	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		418	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		419	&& ECB_CLANG_BUILTIN(__builtin_popcount))
321	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	420	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
322	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	421	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
323	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	422	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
324	#define ecb_ctz32(x) __builtin_ctz (x)	423	#define ecb_ctz32(x) __builtin_ctz (x)
325	#define ecb_ctz64(x) __builtin_ctzll (x)	424	#define ecb_ctz64(x) __builtin_ctzll (x)
326	#define ecb_popcount32(x) __builtin_popcount (x)	425	#define ecb_popcount32(x) __builtin_popcount (x)
327	/* no popcountll */	426	/* no popcountll */
328	#else	427	#else
329	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	428	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
330	ecb_function_ int	429	ecb_function_ ecb_const int
331	ecb_ctz32 (uint32_t x)	430	ecb_ctz32 (uint32_t x)
332	{	431	{
		432	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		433	unsigned long r;
		434	_BitScanForward (&r, x);
		435	return (int)r;
		436	#else
333	int r = 0;	437	int r = 0;
334		438
335	x &= ~x + 1; /* this isolates the lowest bit */	439	x &= ~x + 1; /* this isolates the lowest bit */
336		440
337	#if ECB_branchless_on_i386	441	#if ECB_branchless_on_i386
…		…
347	if (x & 0xff00ff00) r += 8;	451	if (x & 0xff00ff00) r += 8;
348	if (x & 0xffff0000) r += 16;	452	if (x & 0xffff0000) r += 16;
349	#endif	453	#endif
350		454
351	return r;	455	return r;
		456	#endif
352	}	457	}
353		458
354	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	459	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
355	ecb_function_ int	460	ecb_function_ ecb_const int
356	ecb_ctz64 (uint64_t x)	461	ecb_ctz64 (uint64_t x)
357	{	462	{
		463	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		464	unsigned long r;
		465	_BitScanForward64 (&r, x);
		466	return (int)r;
		467	#else
358	int shift = x & 0xffffffffU ? 0 : 32;	468	int shift = x & 0xffffffff ? 0 : 32;
359	return ecb_ctz32 (x >> shift) + shift;	469	return ecb_ctz32 (x >> shift) + shift;
		470	#endif
360	}	471	}
361		472
362	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	473	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
363	ecb_function_ int	474	ecb_function_ ecb_const int
364	ecb_popcount32 (uint32_t x)	475	ecb_popcount32 (uint32_t x)
365	{	476	{
366	x -= (x >> 1) & 0x55555555;	477	x -= (x >> 1) & 0x55555555;
367	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	478	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
368	x = ((x >> 4) + x) & 0x0f0f0f0f;	479	x = ((x >> 4) + x) & 0x0f0f0f0f;
369	x *= 0x01010101;	480	x *= 0x01010101;
370		481
371	return x >> 24;	482	return x >> 24;
372	}	483	}
373		484
374	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	485	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
375	ecb_function_ int ecb_ld32 (uint32_t x)	486	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
376	{	487	{
		488	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		489	unsigned long r;
		490	_BitScanReverse (&r, x);
		491	return (int)r;
		492	#else
377	int r = 0;	493	int r = 0;
378		494
379	if (x >> 16) { x >>= 16; r += 16; }	495	if (x >> 16) { x >>= 16; r += 16; }
380	if (x >> 8) { x >>= 8; r += 8; }	496	if (x >> 8) { x >>= 8; r += 8; }
381	if (x >> 4) { x >>= 4; r += 4; }	497	if (x >> 4) { x >>= 4; r += 4; }
382	if (x >> 2) { x >>= 2; r += 2; }	498	if (x >> 2) { x >>= 2; r += 2; }
383	if (x >> 1) { r += 1; }	499	if (x >> 1) { r += 1; }
384		500
385	return r;	501	return r;
		502	#endif
386	}	503	}
387		504
388	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	505	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
389	ecb_function_ int ecb_ld64 (uint64_t x)	506	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
390	{	507	{
		508	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		509	unsigned long r;
		510	_BitScanReverse64 (&r, x);
		511	return (int)r;
		512	#else
391	int r = 0;	513	int r = 0;
392		514
393	if (x >> 32) { x >>= 32; r += 32; }	515	if (x >> 32) { x >>= 32; r += 32; }
394		516
395	return r + ecb_ld32 (x);	517	return r + ecb_ld32 (x);
396	}
397	#endif	518	#endif
		519	}
		520	#endif
398		521
399	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	522	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)); }	523	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;	524	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)); }	525	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
403		526
404	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	527	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
405	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	528	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
406	{	529	{
407	return ( (x * 0x0802U & 0x22110U)	530	return ( (x * 0x0802U & 0x22110U)
408	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	531	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
409	}	532	}
410		533
411	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	534	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
412	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	535	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
413	{	536	{
414	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	537	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
415	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	538	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
416	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	539	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
417	x = ( x >> 8 ) \| ( x << 8);	540	x = ( x >> 8 ) \| ( x << 8);
418		541
419	return x;	542	return x;
420	}	543	}
421		544
422	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	545	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
423	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	546	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
424	{	547	{
425	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	548	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
426	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	549	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
427	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	550	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
428	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	551	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
431	return x;	554	return x;
432	}	555	}
433		556
434	/* popcount64 is only available on 64 bit cpus as gcc builtin */	557	/* popcount64 is only available on 64 bit cpus as gcc builtin */
435	/* so for this version we are lazy */	558	/* so for this version we are lazy */
436	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	559	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
437	ecb_function_ int	560	ecb_function_ ecb_const int
438	ecb_popcount64 (uint64_t x)	561	ecb_popcount64 (uint64_t x)
439	{	562	{
440	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	563	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
441	}	564	}
442		565
443	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	566	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;	567	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;	568	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;	569	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;	570	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;	571	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;	572	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;	573	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
451		574
452	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	575	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); }	576	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); }	577	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); }	578	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); }	579	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); }	580	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); }	581	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); }	582	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
460		583
461	#if ECB_GCC_VERSION(4,3)	584	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		585	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		586	#define ecb_bswap16(x) __builtin_bswap16 (x)
		587	#else
462	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	588	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		589	#endif
463	#define ecb_bswap32(x) __builtin_bswap32 (x)	590	#define ecb_bswap32(x) __builtin_bswap32 (x)
464	#define ecb_bswap64(x) __builtin_bswap64 (x)	591	#define ecb_bswap64(x) __builtin_bswap64 (x)
		592	#elif _MSC_VER
		593	#include <stdlib.h>
		594	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		595	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		596	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
465	#else	597	#else
466	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	598	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
467	ecb_function_ uint16_t	599	ecb_function_ ecb_const uint16_t
468	ecb_bswap16 (uint16_t x)	600	ecb_bswap16 (uint16_t x)
469	{	601	{
470	return ecb_rotl16 (x, 8);	602	return ecb_rotl16 (x, 8);
471	}	603	}
472		604
473	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	605	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
474	ecb_function_ uint32_t	606	ecb_function_ ecb_const uint32_t
475	ecb_bswap32 (uint32_t x)	607	ecb_bswap32 (uint32_t x)
476	{	608	{
477	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	609	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
478	}	610	}
479		611
480	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	612	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
481	ecb_function_ uint64_t	613	ecb_function_ ecb_const uint64_t
482	ecb_bswap64 (uint64_t x)	614	ecb_bswap64 (uint64_t x)
483	{	615	{
484	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	616	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
485	}	617	}
486	#endif	618	#endif
487		619
488	#if ECB_GCC_VERSION(4,5)	620	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
489	#define ecb_unreachable() __builtin_unreachable ()	621	#define ecb_unreachable() __builtin_unreachable ()
490	#else	622	#else
491	/* this seems to work fine, but gcc always emits a warning for it :/ */	623	/* this seems to work fine, but gcc always emits a warning for it :/ */
492	ecb_inline void ecb_unreachable (void) ecb_noreturn;	624	ecb_inline ecb_noreturn void ecb_unreachable (void);
493	ecb_inline void ecb_unreachable (void) { }	625	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
494	#endif	626	#endif
495		627
496	/* try to tell the compiler that some condition is definitely true */	628	/* try to tell the compiler that some condition is definitely true */
497	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	629	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
498		630
499	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	631	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
500	ecb_inline unsigned char	632	ecb_inline ecb_const unsigned char
501	ecb_byteorder_helper (void)	633	ecb_byteorder_helper (void)
502	{	634	{
503	/* the union code still generates code under pressure in gcc, */	635	/* the union code still generates code under pressure in gcc, */
504	/* but less than using pointers, and always seems to */	636	/* but less than using pointers, and always seems to */
505	/* successfully return a constant. */	637	/* successfully return a constant. */
506	/* the reason why we have this horrible preprocessor mess */	638	/* the reason why we have this horrible preprocessor mess */
507	/* is to avoid it in all cases, at least on common architectures */	639	/* is to avoid it in all cases, at least on common architectures */
508	/* or when using a recent enough gcc version (>= 4.6) */	640	/* or when using a recent enough gcc version (>= 4.6) */
509	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	641	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
510	return 0x44;	642	return 0x44;
511	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	643	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
512	return 0x44;	644	return 0x44;
513	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	645	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
514	return 0x11;	646	return 0x11;
…		…
520	} u = { 0x11223344 };	652	} u = { 0x11223344 };
521	return u.c;	653	return u.c;
522	#endif	654	#endif
523	}	655	}
524		656
525	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	657	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
526	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	658	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;	659	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
528	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	660	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
529		661
530	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	662	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
531	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	663	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
532	#else	664	#else
533	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	665	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
534	#endif	666	#endif
535		667
536	#if __cplusplus	668	#if ECB_CPP
537	template<typename T>	669	template<typename T>
538	static inline T ecb_div_rd (T val, T div)	670	static inline T ecb_div_rd (T val, T div)
539	{	671	{
540	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	672	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
541	}	673	}
…		…
558	}	690	}
559	#else	691	#else
560	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	692	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
561	#endif	693	#endif
562		694
		695	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		696	ecb_function_ ecb_const uint32_t
		697	ecb_binary16_to_binary32 (uint32_t x)
		698	{
		699	unsigned int s = (x & 0x8000) << (31 - 15);
		700	int e = (x >> 10) & 0x001f;
		701	unsigned int m = x & 0x03ff;
		702
		703	if (ecb_expect_false (e == 31))
		704	/* infinity or NaN */
		705	e = 255 - (127 - 15);
		706	else if (ecb_expect_false (!e))
		707	{
		708	if (ecb_expect_true (!m))
		709	/* zero, handled by code below by forcing e to 0 */
		710	e = 0 - (127 - 15);
		711	else
		712	{
		713	/* subnormal, renormalise */
		714	unsigned int s = 10 - ecb_ld32 (m);
		715
		716	m = (m << s) & 0x3ff; /* mask implicit bit */
		717	e -= s - 1;
		718	}
		719	}
		720
		721	/* e and m now are normalised, or zero, (or inf or nan) */
		722	e += 127 - 15;
		723
		724	return s \| (e << 23) \| (m << (23 - 10));
		725	}
		726
		727	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		728	ecb_function_ ecb_const uint16_t
		729	ecb_binary32_to_binary16 (uint32_t x)
		730	{
		731	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		732	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		733	unsigned int m = x & 0x007fffff;
		734
		735	x &= 0x7fffffff;
		736
		737	/* if it's within range of binary16 normals, use fast path */
		738	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		739	{
		740	/* mantissa round-to-even */
		741	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		742
		743	/* handle overflow */
		744	if (ecb_expect_false (m >= 0x00800000))
		745	{
		746	m >>= 1;
		747	e += 1;
		748	}
		749
		750	return s \| (e << 10) \| (m >> (23 - 10));
		751	}
		752
		753	/* handle large numbers and infinity */
		754	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		755	return s \| 0x7c00;
		756
		757	/* handle zero, subnormals and small numbers */
		758	if (ecb_expect_true (x < 0x38800000))
		759	{
		760	/* zero */
		761	if (ecb_expect_true (!x))
		762	return s;
		763
		764	/* handle subnormals */
		765
		766	/* too small, will be zero */
		767	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		768	return s;
		769
		770	m \|= 0x00800000; /* make implicit bit explicit */
		771
		772	/* very tricky - we need to round to the nearest e (+10) bit value */
		773	{
		774	unsigned int bits = 14 - e;
		775	unsigned int half = (1 << (bits - 1)) - 1;
		776	unsigned int even = (m >> bits) & 1;
		777
		778	/* if this overflows, we will end up with a normalised number */
		779	m = (m + half + even) >> bits;
		780	}
		781
		782	return s \| m;
		783	}
		784
		785	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		786	m >>= 13;
		787
		788	return s \| 0x7c00 \| m \| !m;
		789	}
		790
563	/*******************************************************************************/	791	/*******************************************************************************/
564	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */	792	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
565		793
566	/* basically, everything uses "ieee pure-endian" floating point numbers */	794	/* basically, everything uses "ieee pure-endian" floating point numbers */
567	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	795	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
568	#if 0 \	796	#if 0 \
569	\|\| __i386 \|\| __i386__ \	797	\|\| __i386 \|\| __i386__ \
570	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	798	\|\| ECB_GCC_AMD64 \
571	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	799	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
572	\|\| defined __arm__ && defined __ARM_EABI__ \
573	\|\| defined __s390__ \|\| defined __s390x__ \	800	\|\| defined __s390__ \|\| defined __s390x__ \
574	\|\| defined __mips__ \	801	\|\| defined __mips__ \
575	\|\| defined __alpha__ \	802	\|\| defined __alpha__ \
576	\|\| defined __hppa__ \	803	\|\| defined __hppa__ \
577	\|\| defined __ia64__ \	804	\|\| defined __ia64__ \
578	\|\| defined __m68k__ \	805	\|\| defined __m68k__ \
579	\|\| defined __m88k__ \	806	\|\| defined __m88k__ \
580	\|\| defined __sh__ \	807	\|\| defined __sh__ \
581	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	808	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		809	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		810	\|\| defined __aarch64__
582	#define ECB_STDFP 1	811	#define ECB_STDFP 1
583	#include <string.h> /* for memcpy */	812	#include <string.h> /* for memcpy */
584	#else	813	#else
585	#define ECB_STDFP 0	814	#define ECB_STDFP 0
586	#endif	815	#endif
587		816
588	#ifndef ECB_NO_LIBM	817	#ifndef ECB_NO_LIBM
589		818
590	#include <math.h> /* for frexp, ldexp */	819	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
591		820
592	/* converts an ieee half/binary16 to a float */	821	/* only the oldest of old doesn't have this one. solaris. */
593	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;	822	#ifdef INFINITY
594	ecb_function_ float	823	#define ECB_INFINITY INFINITY
595	ecb_binary16_to_float (uint16_t x)	824	#else
596	{	825	#define ECB_INFINITY HUGE_VAL
597	int e = (x >> 10) & 0x1f;	826	#endif
598	int m = x & 0x3ff;
599	float r;
600		827
601	if (!e)
602	r = ldexpf (m , -24);
603	else if (e != 31)
604	r = ldexpf (m + 0x400, e - 25);
605	else if (m)
606	#ifdef NAN	828	#ifdef NAN
607	r = NAN;	829	#define ECB_NAN NAN
608	#endif
609	else	830	#else
610	r = INFINITY;	831	#define ECB_NAN ECB_INFINITY
		832	#endif
611		833
612	return x & 0x8000 ? -r : r;	834	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
613	}	835	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		836	#define ecb_frexpf(x,e) frexpf ((x), (e))
		837	#else
		838	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		839	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		840	#endif
614		841
615	/* convert a float to ieee single/binary32 */	842	/* convert a float to ieee single/binary32 */
616	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	843	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
617	ecb_function_ uint32_t	844	ecb_function_ ecb_const uint32_t
618	ecb_float_to_binary32 (float x)	845	ecb_float_to_binary32 (float x)
619	{	846	{
620	uint32_t r;	847	uint32_t r;
621		848
622	#if ECB_STDFP	849	#if ECB_STDFP
…		…
629	if (x == 0e0f ) return 0x00000000U;	856	if (x == 0e0f ) return 0x00000000U;
630	if (x > +3.40282346638528860e+38f) return 0x7f800000U;	857	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
631	if (x < -3.40282346638528860e+38f) return 0xff800000U;	858	if (x < -3.40282346638528860e+38f) return 0xff800000U;
632	if (x != x ) return 0x7fbfffffU;	859	if (x != x ) return 0x7fbfffffU;
633		860
634	m = frexpf (x, &e) * 0x1000000U;	861	m = ecb_frexpf (x, &e) * 0x1000000U;
635		862
636	r = m & 0x80000000U;	863	r = m & 0x80000000U;
637		864
638	if (r)	865	if (r)
639	m = -m;	866	m = -m;
…		…
651		878
652	return r;	879	return r;
653	}	880	}
654		881
655	/* converts an ieee single/binary32 to a float */	882	/* converts an ieee single/binary32 to a float */
656	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	883	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
657	ecb_function_ float	884	ecb_function_ ecb_const float
658	ecb_binary32_to_float (uint32_t x)	885	ecb_binary32_to_float (uint32_t x)
659	{	886	{
660	float r;	887	float r;
661		888
662	#if ECB_STDFP	889	#if ECB_STDFP
…		…
672	x \|= 0x800000U;	899	x \|= 0x800000U;
673	else	900	else
674	e = 1;	901	e = 1;
675		902
676	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	903	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
677	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	904	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
678		905
679	r = neg ? -r : r;	906	r = neg ? -r : r;
680	#endif	907	#endif
681		908
682	return r;	909	return r;
683	}	910	}
684		911
685	/* convert a double to ieee double/binary64 */	912	/* convert a double to ieee double/binary64 */
686	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	913	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
687	ecb_function_ uint64_t	914	ecb_function_ ecb_const uint64_t
688	ecb_double_to_binary64 (double x)	915	ecb_double_to_binary64 (double x)
689	{	916	{
690	uint64_t r;	917	uint64_t r;
691		918
692	#if ECB_STDFP	919	#if ECB_STDFP
…		…
721		948
722	return r;	949	return r;
723	}	950	}
724		951
725	/* converts an ieee double/binary64 to a double */	952	/* converts an ieee double/binary64 to a double */
726	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	953	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
727	ecb_function_ double	954	ecb_function_ ecb_const double
728	ecb_binary64_to_double (uint64_t x)	955	ecb_binary64_to_double (uint64_t x)
729	{	956	{
730	double r;	957	double r;
731		958
732	#if ECB_STDFP	959	#if ECB_STDFP
…		…
750	#endif	977	#endif
751		978
752	return r;	979	return r;
753	}	980	}
754		981
755	#endif	982	/* convert a float to ieee half/binary16 */
		983	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		984	ecb_function_ ecb_const uint16_t
		985	ecb_float_to_binary16 (float x)
		986	{
		987	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		988	}
756		989
757	#endif	990	/* convert an ieee half/binary16 to float */
		991	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		992	ecb_function_ ecb_const float
		993	ecb_binary16_to_float (uint16_t x)
		994	{
		995	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		996	}
758		997
		998	#endif
		999
		1000	#endif
		1001

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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 1.172 by root, Tue Nov 24 22:12:00 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 1.172 by root, Tue Nov 24 22:12:00 2015 UTC