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

Comparing libecb/ecb.h (file contents):
Revision 1.109 by root, Fri Jun 29 14:05:50 2012 UTC vs.
Revision 1.169 by root, Sat Nov 21 20:56:38 2015 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
32		43
33	/* 16 bits major, 16 bits minor */	44	/* 16 bits major, 16 bits minor */
34	#define ECB_VERSION 0x00010001	45	#define ECB_VERSION 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
		82	/* work around x32 idiocy by defining proper macros */
		83	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		84	#if _ILP32
		85	#define ECB_AMD64_X32 1
		86	#else
		87	#define ECB_AMD64 1
		88	#endif
		89	#endif
		90
68	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
69	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
70	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
71	* or so.	94	* or so.
72	* 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
73	* 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.
74	*/	97	*/
75	#ifndef ECB_GCC_VERSION
76	#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__
77	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
78	#else	100	#else
79	#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)))
80	#endif	102	#endif
81	#endif
82		103
83	#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)))
84	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
85	#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
86	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
87	#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)
88		131
89	#if ECB_CPP	132	#if ECB_CPP
90	#define ECB_EXTERN_C extern "C"	133	#define ECB_EXTERN_C extern "C"
91	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
92	#define ECB_EXTERN_C_END }	135	#define ECB_EXTERN_C_END }
…		…
105	#define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
106	#endif	149	#endif
107		150
108	#if ECB_NO_SMP	151	#if ECB_NO_SMP
109	#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>
110	#endif	158	#endif
111		159
112	#ifndef ECB_MEMORY_FENCE	160	#ifndef ECB_MEMORY_FENCE
113	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	161	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
114	#if __i386 \|\| __i386__	162	#if __i386 \|\| __i386__
115	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	163	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
116	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	164	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
117	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	165	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
118	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	166	#elif ECB_GCC_AMD64
119	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
120	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
121	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
122	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	170	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
123	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
…		…
125	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	173	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	174	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
127	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	175	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
128	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	176	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
129	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
130	#elif __sparc \|\| __sparc__	178	#elif __aarch64__
		179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		180	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
131	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	181	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
132	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	182	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
133	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	183	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
134	#elif defined __s390__ \|\| defined __s390x__	184	#elif defined __s390__ \|\| defined __s390x__
135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
136	#elif defined __mips__	186	#elif defined __mips__
		187	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		188	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
137	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	189	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
138	#elif defined __alpha__	190	#elif defined __alpha__
139	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	191	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
140	#elif defined __hppa__	192	#elif defined __hppa__
141	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")	193	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	194	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
143	#elif defined __ia64__	195	#elif defined __ia64__
144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")	196	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		197	#elif defined __m68k__
		198	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		199	#elif defined __m88k__
		200	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		201	#elif defined __sh__
		202	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
145	#endif	203	#endif
146	#endif	204	#endif
147	#endif	205	#endif
148		206
149	#ifndef ECB_MEMORY_FENCE	207	#ifndef ECB_MEMORY_FENCE
150	#if ECB_GCC_VERSION(4,7)	208	#if ECB_GCC_VERSION(4,7)
151	/* see comment below (stdatomic.h) about the C11 memory model. */	209	/* see comment below (stdatomic.h) about the C11 memory model. */
152	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	210	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
153	/#elif defined __clang && __has_feature (cxx_atomic)/	211	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		212	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		213
		214	#elif ECB_CLANG_EXTENSION(c_atomic)
154	/* see comment below (stdatomic.h) about the C11 memory model. */	215	/* see comment below (stdatomic.h) about the C11 memory model. */
155	/#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)/	216	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		217	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		218	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		219
156	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	220	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
157	#define ECB_MEMORY_FENCE __sync_synchronize ()	221	#define ECB_MEMORY_FENCE __sync_synchronize ()
		222	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		223	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		224	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		225	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		226	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		227	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
158	#elif _MSC_VER >= 1400 /* VC++ 2005 */	228	#elif _MSC_VER >= 1400 /* VC++ 2005 */
159	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	229	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
160	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	230	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
161	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	231	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
162	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	232	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
182	/* any fence other than seq_cst, which isn't very efficient for us. */	252	/* any fence other than seq_cst, which isn't very efficient for us. */
183	/* Why that is, we don't know - either the C11 memory model is quite useless */	253	/* Why that is, we don't know - either the C11 memory model is quite useless */
184	/* for most usages, or gcc and clang have a bug */	254	/* for most usages, or gcc and clang have a bug */
185	/* I currently lean towards the latter, and inefficiently implement */	255	/* I currently lean towards the latter, and inefficiently implement */
186	/* all three of ecb's fences as a seq_cst fence */	256	/* all three of ecb's fences as a seq_cst fence */
		257	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		258	/* for all __atomic_thread_fence's except seq_cst */
187	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	259	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
188	#endif	260	#endif
189	#endif	261	#endif
190		262
191	#ifndef ECB_MEMORY_FENCE	263	#ifndef ECB_MEMORY_FENCE
…		…
214	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	286	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
215	#endif	287	#endif
216		288
217	/*****************************************************************************/	289	/*****************************************************************************/
218		290
219	#if __cplusplus	291	#if ECB_CPP
220	#define ecb_inline static inline	292	#define ecb_inline static inline
221	#elif ECB_GCC_VERSION(2,5)	293	#elif ECB_GCC_VERSION(2,5)
222	#define ecb_inline static __inline__	294	#define ecb_inline static __inline__
223	#elif ECB_C99	295	#elif ECB_C99
224	#define ecb_inline static inline	296	#define ecb_inline static inline
…		…
238		310
239	#define ECB_CONCAT_(a, b) a ## b	311	#define ECB_CONCAT_(a, b) a ## b
240	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	312	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
241	#define ECB_STRINGIFY_(a) # a	313	#define ECB_STRINGIFY_(a) # a
242	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	314	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		315	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
243		316
244	#define ecb_function_ ecb_inline	317	#define ecb_function_ ecb_inline
245		318
246	#if ECB_GCC_VERSION(3,1)	319	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
247	#define ecb_attribute(attrlist) __attribute__(attrlist)	320	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		321	#else
		322	#define ecb_attribute(attrlist)
		323	#endif
		324
		325	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
248	#define ecb_is_constant(expr) __builtin_constant_p (expr)	326	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		327	#else
		328	/* possible C11 impl for integral types
		329	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		330	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		331
		332	#define ecb_is_constant(expr) 0
		333	#endif
		334
		335	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
249	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	336	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		337	#else
		338	#define ecb_expect(expr,value) (expr)
		339	#endif
		340
		341	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
250	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	342	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
251	#else	343	#else
252	#define ecb_attribute(attrlist)
253	#define ecb_is_constant(expr) 0
254	#define ecb_expect(expr,value) (expr)
255	#define ecb_prefetch(addr,rw,locality)	344	#define ecb_prefetch(addr,rw,locality)
256	#endif	345	#endif
257		346
258	/* no emulation for ecb_decltype */	347	/* no emulation for ecb_decltype */
259	#if ECB_GCC_VERSION(4,5)	348	#if ECB_CPP11
		349	// older implementations might have problems with decltype(x)::type, work around it
		350	template<class T> struct ecb_decltype_t { typedef T type; };
260	#define ecb_decltype(x) __decltype(x)	351	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
261	#elif ECB_GCC_VERSION(3,0)	352	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
262	#define ecb_decltype(x) __typeof(x)	353	#define ecb_decltype(x) __typeof__ (x)
263	#endif	354	#endif
264		355
		356	#if _MSC_VER >= 1300
		357	#define ecb_deprecated __declspec (deprecated)
		358	#else
		359	#define ecb_deprecated ecb_attribute ((__deprecated__))
		360	#endif
		361
		362	#if _MSC_VER >= 1500
		363	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		364	#elif ECB_GCC_VERSION(4,5)
		365	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		366	#else
		367	#define ecb_deprecated_message(msg) ecb_deprecated
		368	#endif
		369
		370	#if _MSC_VER >= 1400
		371	#define ecb_noinline __declspec (noinline)
		372	#else
265	#define ecb_noinline ecb_attribute ((__noinline__))	373	#define ecb_noinline ecb_attribute ((__noinline__))
		374	#endif
		375
266	#define ecb_unused ecb_attribute ((__unused__))	376	#define ecb_unused ecb_attribute ((__unused__))
267	#define ecb_const ecb_attribute ((__const__))	377	#define ecb_const ecb_attribute ((__const__))
268	#define ecb_pure ecb_attribute ((__pure__))	378	#define ecb_pure ecb_attribute ((__pure__))
269		379
270	#if ECB_C11	380	#if ECB_C11 \|\| __IBMC_NORETURN
		381	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
271	#define ecb_noreturn _Noreturn	382	#define ecb_noreturn _Noreturn
		383	#elif ECB_CPP11
		384	#define ecb_noreturn [[noreturn]]
		385	#elif _MSC_VER >= 1200
		386	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		387	#define ecb_noreturn __declspec (noreturn)
272	#else	388	#else
273	#define ecb_noreturn ecb_attribute ((__noreturn__))	389	#define ecb_noreturn ecb_attribute ((__noreturn__))
274	#endif	390	#endif
275		391
276	#if ECB_GCC_VERSION(4,3)	392	#if ECB_GCC_VERSION(4,3)
…		…
291	/* for compatibility to the rest of the world */	407	/* for compatibility to the rest of the world */
292	#define ecb_likely(expr) ecb_expect_true (expr)	408	#define ecb_likely(expr) ecb_expect_true (expr)
293	#define ecb_unlikely(expr) ecb_expect_false (expr)	409	#define ecb_unlikely(expr) ecb_expect_false (expr)
294		410
295	/* count trailing zero bits and count # of one bits */	411	/* count trailing zero bits and count # of one bits */
296	#if ECB_GCC_VERSION(3,4)	412	#if ECB_GCC_VERSION(3,4) \
		413	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		414	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		415	&& ECB_CLANG_BUILTIN(__builtin_popcount))
297	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	416	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
298	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	417	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
299	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	418	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
300	#define ecb_ctz32(x) __builtin_ctz (x)	419	#define ecb_ctz32(x) __builtin_ctz (x)
301	#define ecb_ctz64(x) __builtin_ctzll (x)	420	#define ecb_ctz64(x) __builtin_ctzll (x)
302	#define ecb_popcount32(x) __builtin_popcount (x)	421	#define ecb_popcount32(x) __builtin_popcount (x)
303	/* no popcountll */	422	/* no popcountll */
304	#else	423	#else
305	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	424	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
306	ecb_function_ int	425	ecb_function_ ecb_const int
307	ecb_ctz32 (uint32_t x)	426	ecb_ctz32 (uint32_t x)
308	{	427	{
309	int r = 0;	428	int r = 0;
310		429
311	x &= ~x + 1; /* this isolates the lowest bit */	430	x &= ~x + 1; /* this isolates the lowest bit */
…		…
325	#endif	444	#endif
326		445
327	return r;	446	return r;
328	}	447	}
329		448
330	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
331	ecb_function_ int	450	ecb_function_ ecb_const int
332	ecb_ctz64 (uint64_t x)	451	ecb_ctz64 (uint64_t x)
333	{	452	{
334	int shift = x & 0xffffffffU ? 0 : 32;	453	int shift = x & 0xffffffff ? 0 : 32;
335	return ecb_ctz32 (x >> shift) + shift;	454	return ecb_ctz32 (x >> shift) + shift;
336	}	455	}
337		456
338	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
339	ecb_function_ int	458	ecb_function_ ecb_const int
340	ecb_popcount32 (uint32_t x)	459	ecb_popcount32 (uint32_t x)
341	{	460	{
342	x -= (x >> 1) & 0x55555555;	461	x -= (x >> 1) & 0x55555555;
343	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	462	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
344	x = ((x >> 4) + x) & 0x0f0f0f0f;	463	x = ((x >> 4) + x) & 0x0f0f0f0f;
345	x *= 0x01010101;	464	x *= 0x01010101;
346		465
347	return x >> 24;	466	return x >> 24;
348	}	467	}
349		468
350	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	469	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
351	ecb_function_ int ecb_ld32 (uint32_t x)	470	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
352	{	471	{
353	int r = 0;	472	int r = 0;
354		473
355	if (x >> 16) { x >>= 16; r += 16; }	474	if (x >> 16) { x >>= 16; r += 16; }
356	if (x >> 8) { x >>= 8; r += 8; }	475	if (x >> 8) { x >>= 8; r += 8; }
…		…
359	if (x >> 1) { r += 1; }	478	if (x >> 1) { r += 1; }
360		479
361	return r;	480	return r;
362	}	481	}
363		482
364	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	483	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
365	ecb_function_ int ecb_ld64 (uint64_t x)	484	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
366	{	485	{
367	int r = 0;	486	int r = 0;
368		487
369	if (x >> 32) { x >>= 32; r += 32; }	488	if (x >> 32) { x >>= 32; r += 32; }
370		489
371	return r + ecb_ld32 (x);	490	return r + ecb_ld32 (x);
372	}	491	}
373	#endif	492	#endif
374		493
375	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	494	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
376	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	495	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
377	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	496	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
378	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	497	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
379		498
380	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	499	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
381	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	500	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
382	{	501	{
383	return ( (x * 0x0802U & 0x22110U)	502	return ( (x * 0x0802U & 0x22110U)
384	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	503	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
385	}	504	}
386		505
387	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	506	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
388	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	507	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
389	{	508	{
390	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	509	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
391	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	510	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
392	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	511	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
393	x = ( x >> 8 ) \| ( x << 8);	512	x = ( x >> 8 ) \| ( x << 8);
394		513
395	return x;	514	return x;
396	}	515	}
397		516
398	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	517	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
399	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	518	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
400	{	519	{
401	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	520	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
402	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	521	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
403	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	522	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
404	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	523	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
407	return x;	526	return x;
408	}	527	}
409		528
410	/* popcount64 is only available on 64 bit cpus as gcc builtin */	529	/* popcount64 is only available on 64 bit cpus as gcc builtin */
411	/* so for this version we are lazy */	530	/* so for this version we are lazy */
412	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	531	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
413	ecb_function_ int	532	ecb_function_ ecb_const int
414	ecb_popcount64 (uint64_t x)	533	ecb_popcount64 (uint64_t x)
415	{	534	{
416	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	535	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
417	}	536	}
418		537
419	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	538	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
420	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	539	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
421	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	540	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
422	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	541	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
423	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	542	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
424	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	543	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
425	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	544	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
426	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	545	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
427		546
428	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	547	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
429	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	548	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
430	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	549	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
431	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	550	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
432	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	551	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
433	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	552	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
434	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	553	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
435	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	554	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
436		555
437	#if ECB_GCC_VERSION(4,3)	556	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		557	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		558	#define ecb_bswap16(x) __builtin_bswap16 (x)
		559	#else
438	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	560	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		561	#endif
439	#define ecb_bswap32(x) __builtin_bswap32 (x)	562	#define ecb_bswap32(x) __builtin_bswap32 (x)
440	#define ecb_bswap64(x) __builtin_bswap64 (x)	563	#define ecb_bswap64(x) __builtin_bswap64 (x)
		564	#elif _MSC_VER
		565	#include <stdlib.h>
		566	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		567	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		568	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
441	#else	569	#else
442	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	570	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
443	ecb_function_ uint16_t	571	ecb_function_ ecb_const uint16_t
444	ecb_bswap16 (uint16_t x)	572	ecb_bswap16 (uint16_t x)
445	{	573	{
446	return ecb_rotl16 (x, 8);	574	return ecb_rotl16 (x, 8);
447	}	575	}
448		576
449	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	577	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
450	ecb_function_ uint32_t	578	ecb_function_ ecb_const uint32_t
451	ecb_bswap32 (uint32_t x)	579	ecb_bswap32 (uint32_t x)
452	{	580	{
453	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	581	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
454	}	582	}
455		583
456	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	584	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
457	ecb_function_ uint64_t	585	ecb_function_ ecb_const uint64_t
458	ecb_bswap64 (uint64_t x)	586	ecb_bswap64 (uint64_t x)
459	{	587	{
460	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	588	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
461	}	589	}
462	#endif	590	#endif
463		591
464	#if ECB_GCC_VERSION(4,5)	592	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
465	#define ecb_unreachable() __builtin_unreachable ()	593	#define ecb_unreachable() __builtin_unreachable ()
466	#else	594	#else
467	/* this seems to work fine, but gcc always emits a warning for it :/ */	595	/* this seems to work fine, but gcc always emits a warning for it :/ */
468	ecb_inline void ecb_unreachable (void) ecb_noreturn;	596	ecb_inline ecb_noreturn void ecb_unreachable (void);
469	ecb_inline void ecb_unreachable (void) { }	597	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
470	#endif	598	#endif
471		599
472	/* try to tell the compiler that some condition is definitely true */	600	/* try to tell the compiler that some condition is definitely true */
473	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	601	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
474		602
475	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	603	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
476	ecb_inline unsigned char	604	ecb_inline ecb_const unsigned char
477	ecb_byteorder_helper (void)	605	ecb_byteorder_helper (void)
478	{	606	{
479	/* the union code still generates code under pressure in gcc, */	607	/* the union code still generates code under pressure in gcc, */
480	/* but less than using pointers, and always seem to */	608	/* but less than using pointers, and always seems to */
481	/* successfully return a constant. */	609	/* successfully return a constant. */
482	/* the reason why we have this horrible preprocessor mess */	610	/* the reason why we have this horrible preprocessor mess */
483	/* is to avoid it in all cases, at least on common architectures */	611	/* is to avoid it in all cases, at least on common architectures */
484	/* and yes, gcc defines __BYTE_ORDER__, g++ does not */	612	/* or when using a recent enough gcc version (>= 4.6) */
485	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	613	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
486	return 0x44;	614	return 0x44;
487	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	615	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
488	return 0x44;	616	return 0x44;
489	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	617	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
490	retrurn 0x11;	618	return 0x11;
491	#else	619	#else
492	union	620	union
493	{	621	{
494	uint32_t i;	622	uint32_t i;
495	uint8_t c;	623	uint8_t c;
496	} u = { 0x11223344 };	624	} u = { 0x11223344 };
497	return u.c;	625	return u.c;
498	#endif	626	#endif
499	}	627	}
500		628
501	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	629	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
502	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	630	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
503	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	631	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
504	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	632	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
505		633
506	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	634	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
507	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	635	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
508	#else	636	#else
509	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	637	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
510	#endif	638	#endif
511		639
512	#if __cplusplus	640	#if ECB_CPP
513	template<typename T>	641	template<typename T>
514	static inline T ecb_div_rd (T val, T div)	642	static inline T ecb_div_rd (T val, T div)
515	{	643	{
516	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	644	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
517	}	645	}
…		…
534	}	662	}
535	#else	663	#else
536	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	664	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
537	#endif	665	#endif
538		666
		667	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint16_t x);
		668	ecb_function_ ecb_const uint32_t
		669	ecb_binary16_to_binary32 (uint16_t x)
		670	{
		671	unsigned int s = (x & 0x8000) << (31 - 15);
		672	int e = (x >> 10) & 0x001f;
		673	unsigned int m = x & 0x03ff;
		674
		675	if (ecb_expect_false (e == 31))
		676	/* infinity or NaN */
		677	e = 255 - (127 - 15);
		678	else if (ecb_expect_false (!e))
		679	{
		680	if (ecb_expect_true (!m))
		681	/* zero, handled by code below by forcing e to 0 */
		682	e = 0 - (127 - 15);
		683	else
		684	{
		685	/* subnormal, renormalise */
		686	unsigned int s = 10 - ecb_ld32 (m);
		687
		688	m = (m << s) & 0x3ff; /* mask implicit bit */
		689	e -= s - 1;
		690	}
		691	}
		692
		693	/* e and m now are normalised, or zero, (or inf or nan) */
		694	e += 127 - 15;
		695
		696	return s \| (e << 23) \| (m << (23 - 10));
		697	}
		698
		699	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		700	ecb_function_ ecb_const uint16_t
		701	ecb_binary32_to_binary16 (uint32_t x)
		702	{
		703	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		704	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		705	unsigned int m = x & 0x007fffff;
		706
		707	x &= 0x7fffffff;
		708
		709	/* if it's within range of binary16 normals, use fast path */
		710	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		711	{
		712	/* mantissa round-to-even */
		713	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		714
		715	/* handle overflow */
		716	if (ecb_expect_false (m >= 0x00800000))
		717	{
		718	m >>= 1;
		719	e += 1;
		720	}
		721
		722	return s \| (e << 10) \| (m >> (23 - 10));
		723	}
		724
		725	/* handle large numbers and infinity */
		726	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		727	return s \| 0x7c00;
		728
		729	/* handle zero, subnormals and small numbers */
		730	if (ecb_expect_true (x < 0x38800000))
		731	{
		732	/* zero */
		733	if (ecb_expect_true (!x))
		734	return s;
		735
		736	/* handle subnormals */
		737
		738	/* too small, will be zero */
		739	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		740	return s;
		741
		742	m \|= 0x00800000; /* make implicit bit explicit */
		743
		744	/* very tricky - we need to round to the nearest e (+10) bit value */
		745	{
		746	unsigned int bits = 14 - e;
		747	unsigned int half = (1 << (bits - 1)) - 1;
		748	unsigned int even = (m >> bits) & 1;
		749
		750	/* if this overflows, we will end up with a normalised number */
		751	m = (m + half + even) >> bits;
		752	}
		753
		754	return s \| m;
		755	}
		756
		757	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		758	m >>= 13;
		759
		760	return s \| 0x7c00 \| m \| !m;
		761	}
		762
539	/*******************************************************************************/	763	/*******************************************************************************/
540	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */	764	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
541		765
542	/* basically, everything uses "ieee pure-endian" floating point numbers */	766	/* basically, everything uses "ieee pure-endian" floating point numbers */
543	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	767	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
544	#if 0 \	768	#if 0 \
545	\|\| __i386 \|\| __i386__ \	769	\|\| __i386 \|\| __i386__ \
546	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	770	\|\| ECB_GCC_AMD64 \
547	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	771	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
548	\|\| defined __arm__ && defined __ARM_EABI__ \
549	\|\| defined __s390__ \|\| defined __s390x__ \	772	\|\| defined __s390__ \|\| defined __s390x__ \
550	\|\| defined __mips__ \	773	\|\| defined __mips__ \
551	\|\| defined __alpha__ \	774	\|\| defined __alpha__ \
552	\|\| defined __hppa__ \	775	\|\| defined __hppa__ \
553	\|\| defined __ia64__ \	776	\|\| defined __ia64__ \
		777	\|\| defined __m68k__ \
		778	\|\| defined __m88k__ \
		779	\|\| defined __sh__ \
554	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	780	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		781	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		782	\|\| defined __aarch64__
555	#define ECB_STDFP 1	783	#define ECB_STDFP 1
556	#include <string.h> /* for memcpy */	784	#include <string.h> /* for memcpy */
557	#else	785	#else
558	#define ECB_STDFP 0	786	#define ECB_STDFP 0
559	#include <math.h> /* for frexp, ldexp */
560	#endif	787	#endif
561		788
562	#ifndef ECB_NO_LIBM	789	#ifndef ECB_NO_LIBM
563		790
		791	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		792
		793	/* only the oldest of old doesn't have this one. solaris. */
		794	#ifdef INFINITY
		795	#define ECB_INFINITY INFINITY
		796	#else
		797	#define ECB_INFINITY HUGE_VAL
		798	#endif
		799
		800	#ifdef NAN
		801	#define ECB_NAN NAN
		802	#else
		803	#define ECB_NAN ECB_INFINITY
		804	#endif
		805
		806	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		807	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		808	#define ecb_frexpf(x,e) frexpf ((x), (e))
		809	#else
		810	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		811	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		812	#endif
		813
564	/* convert a float to ieee single/binary32 */	814	/* convert a float to ieee single/binary32 */
565	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	815	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
566	ecb_function_ uint32_t	816	ecb_function_ ecb_const uint32_t
567	ecb_float_to_binary32 (float x)	817	ecb_float_to_binary32 (float x)
568	{	818	{
569	uint32_t r;	819	uint32_t r;
570		820
571	#if ECB_STDFP	821	#if ECB_STDFP
…		…
578	if (x == 0e0f ) return 0x00000000U;	828	if (x == 0e0f ) return 0x00000000U;
579	if (x > +3.40282346638528860e+38f) return 0x7f800000U;	829	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
580	if (x < -3.40282346638528860e+38f) return 0xff800000U;	830	if (x < -3.40282346638528860e+38f) return 0xff800000U;
581	if (x != x ) return 0x7fbfffffU;	831	if (x != x ) return 0x7fbfffffU;
582		832
583	m = frexpf (x, &e) * 0x1000000U;	833	m = ecb_frexpf (x, &e) * 0x1000000U;
584		834
585	r = m & 0x80000000U;	835	r = m & 0x80000000U;
586		836
587	if (r)	837	if (r)
588	m = -m;	838	m = -m;
…		…
600		850
601	return r;	851	return r;
602	}	852	}
603		853
604	/* converts an ieee single/binary32 to a float */	854	/* converts an ieee single/binary32 to a float */
605	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	855	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
606	ecb_function_ float	856	ecb_function_ ecb_const float
607	ecb_binary32_to_float (uint32_t x)	857	ecb_binary32_to_float (uint32_t x)
608	{	858	{
609	float r;	859	float r;
610		860
611	#if ECB_STDFP	861	#if ECB_STDFP
…		…
621	x \|= 0x800000U;	871	x \|= 0x800000U;
622	else	872	else
623	e = 1;	873	e = 1;
624		874
625	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	875	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
626	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	876	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
627		877
628	r = neg ? -r : r;	878	r = neg ? -r : r;
629	#endif	879	#endif
630		880
631	return r;	881	return r;
632	}	882	}
633		883
634	/* convert a double to ieee double/binary64 */	884	/* convert a double to ieee double/binary64 */
635	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	885	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
636	ecb_function_ uint64_t	886	ecb_function_ ecb_const uint64_t
637	ecb_double_to_binary64 (double x)	887	ecb_double_to_binary64 (double x)
638	{	888	{
639	uint64_t r;	889	uint64_t r;
640		890
641	#if ECB_STDFP	891	#if ECB_STDFP
…		…
670		920
671	return r;	921	return r;
672	}	922	}
673		923
674	/* converts an ieee double/binary64 to a double */	924	/* converts an ieee double/binary64 to a double */
675	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	925	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
676	ecb_function_ double	926	ecb_function_ ecb_const double
677	ecb_binary64_to_double (uint64_t x)	927	ecb_binary64_to_double (uint64_t x)
678	{	928	{
679	double r;	929	double r;
680		930
681	#if ECB_STDFP	931	#if ECB_STDFP
…		…
699	#endif	949	#endif
700		950
701	return r;	951	return r;
702	}	952	}
703		953
704	#endif	954	/* convert a float to ieee half/binary16 */
		955	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		956	ecb_function_ ecb_const uint16_t
		957	ecb_float_to_binary16 (float x)
		958	{
		959	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		960	}
705		961
706	#endif	962	/* convert an ieee half/binary16 to float */
		963	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		964	ecb_function_ ecb_const float
		965	ecb_binary16_to_float (uint16_t x)
		966	{
		967	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		968	}
707		969
		970	#endif
		971
		972	#endif
		973

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Comparing libecb/ecb.h (file contents): Revision 1.109 by root, Fri Jun 29 14:05:50 2012 UTC vs. Revision 1.169 by root, Sat Nov 21 20:56:38 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.109 by root, Fri Jun 29 14:05:50 2012 UTC vs.
Revision 1.169 by root, Sat Nov 21 20:56:38 2015 UTC