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

Comparing libecb/ecb.h (file contents):
Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs.
Revision 1.168 by root, Sat Nov 21 18:09:36 2015 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2011 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
		43
		44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x00010005
32		46
33	#ifdef _WIN32	47	#ifdef _WIN32
34	typedef signed char int8_t;	48	typedef signed char int8_t;
35	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
36	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
42	typedef unsigned long long uint64_t;	56	typedef unsigned long long uint64_t;
43	#else /* _MSC_VER \|\| __BORLANDC__ */	57	#else /* _MSC_VER \|\| __BORLANDC__ */
44	typedef signed __int64 int64_t;	58	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	59	typedef unsigned __int64 uint64_t;
46	#endif	60	#endif
		61	#ifdef _WIN64
		62	#define ECB_PTRSIZE 8
		63	typedef uint64_t uintptr_t;
		64	typedef int64_t intptr_t;
		65	#else
		66	#define ECB_PTRSIZE 4
		67	typedef uint32_t uintptr_t;
		68	typedef int32_t intptr_t;
		69	#endif
47	#else	70	#else
48	#include <inttypes.h>	71	#include <inttypes.h>
		72	#if UINTMAX_MAX > 0xffffffffU
		73	#define ECB_PTRSIZE 8
		74	#else
		75	#define ECB_PTRSIZE 4
		76	#endif
		77	#endif
		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
49	#endif	89	#endif
50		90
51	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
53	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	94	* or so.
55	* 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
56	* 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.
57	*/	97	*/
58	#ifndef ECB_GCC_VERSION
59	#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__
60	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
61	#else	100	#else
62	#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)))
63	#endif	102	#endif
		103
		104	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
		105
		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
		118	#define ECB_CPP (__cplusplus+0)
		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)
		131
		132	#if ECB_CPP
		133	#define ECB_EXTERN_C extern "C"
		134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		135	#define ECB_EXTERN_C_END }
		136	#else
		137	#define ECB_EXTERN_C extern
		138	#define ECB_EXTERN_C_BEG
		139	#define ECB_EXTERN_C_END
64	#endif	140	#endif
65		141
66	/*****************************************************************************/	142	/*****************************************************************************/
67		143
68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	144	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
69	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	145	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70		146
71	#if ECB_NO_THREADS \|\| ECB_NO_SMP	147	#if ECB_NO_THREADS
		148	#define ECB_NO_SMP 1
		149	#endif
		150
		151	#if ECB_NO_SMP
72	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
73	#endif	153	#endif
74		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
75	#ifndef ECB_MEMORY_FENCE	160	#ifndef ECB_MEMORY_FENCE
76	#if ECB_GCC_VERSION(2,5)	161	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
77	#if __i386__	162	#if __i386 \|\| __i386__
78	#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")
79	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	164	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
80	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	165	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
81	#elif __amd64	166	#elif ECB_GCC_AMD64
82	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
83	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
84	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
85	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	170	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
87	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \	172	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
88	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__)	173	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
89	#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")
90	#elif defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \	175	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
91	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )	176	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
92	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		178	#elif __aarch64__
		179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		180	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
		181	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
		182	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		183	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		184	#elif defined __s390__ \|\| defined __s390x__
		185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		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. */
		189	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		190	#elif defined __alpha__
		191	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		192	#elif defined __hppa__
		193	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		194	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		195	#elif defined __ia64__
		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")
93	#endif	203	#endif
94	#endif	204	#endif
95	#endif	205	#endif
96		206
97	#ifndef ECB_MEMORY_FENCE	207	#ifndef ECB_MEMORY_FENCE
		208	#if ECB_GCC_VERSION(4,7)
		209	/* see comment below (stdatomic.h) about the C11 memory model. */
		210	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		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)
		215	/* see comment below (stdatomic.h) about the C11 memory model. */
		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
98	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER)	220	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
99	#define ECB_MEMORY_FENCE __sync_synchronize ()	221	#define ECB_MEMORY_FENCE __sync_synchronize ()
100	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	222	#elif _MSC_VER >= 1500 /* VC++ 2008 */
101	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	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()
102	#elif _MSC_VER >= 1400 /* VC++ 2005 */	228	#elif _MSC_VER >= 1400 /* VC++ 2005 */
103	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	229	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
104	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	230	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
105	#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 */
106	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	232	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
107	#elif defined(_WIN32)	233	#elif defined _WIN32
108	#include <WinNT.h>	234	#include <WinNT.h>
109	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	235	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		236	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		237	#include <mbarrier.h>
		238	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		239	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		240	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		241	#elif __xlC__
		242	#define ECB_MEMORY_FENCE __sync ()
		243	#endif
		244	#endif
		245
		246	#ifndef ECB_MEMORY_FENCE
		247	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		248	/* we assume that these memory fences work on all variables/all memory accesses, */
		249	/* not just C11 atomics and atomic accesses */
		250	#include <stdatomic.h>
		251	/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
		252	/* any fence other than seq_cst, which isn't very efficient for us. */
		253	/* Why that is, we don't know - either the C11 memory model is quite useless */
		254	/* for most usages, or gcc and clang have a bug */
		255	/* I currently lean towards the latter, and inefficiently implement */
		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 */
		259	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
110	#endif	260	#endif
111	#endif	261	#endif
112		262
113	#ifndef ECB_MEMORY_FENCE	263	#ifndef ECB_MEMORY_FENCE
114	#if !ECB_AVOID_PTHREADS	264	#if !ECB_AVOID_PTHREADS
…		…
126	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;	276	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
127	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)	277	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
128	#endif	278	#endif
129	#endif	279	#endif
130		280
131	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)	281	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
132	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE	282	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
133	#endif	283	#endif
134		284
135	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)	285	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
136	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	286	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
137	#endif	287	#endif
138		288
139	/*****************************************************************************/	289	/*****************************************************************************/
140		290
141	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	291	#if ECB_CPP
142
143	#if __cplusplus
144	#define ecb_inline static inline	292	#define ecb_inline static inline
145	#elif ECB_GCC_VERSION(2,5)	293	#elif ECB_GCC_VERSION(2,5)
146	#define ecb_inline static __inline__	294	#define ecb_inline static __inline__
147	#elif ECB_C99	295	#elif ECB_C99
148	#define ecb_inline static inline	296	#define ecb_inline static inline
…		…
162		310
163	#define ECB_CONCAT_(a, b) a ## b	311	#define ECB_CONCAT_(a, b) a ## b
164	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	312	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
165	#define ECB_STRINGIFY_(a) # a	313	#define ECB_STRINGIFY_(a) # a
166	#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))
167		316
168	#define ecb_function_ ecb_inline	317	#define ecb_function_ ecb_inline
169		318
170	#if ECB_GCC_VERSION(3,1)	319	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
171	#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)
172	#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)
173	#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)
174	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	342	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
175	#else	343	#else
176	#define ecb_attribute(attrlist)
177	#define ecb_is_constant(expr) 0
178	#define ecb_expect(expr,value) (expr)
179	#define ecb_prefetch(addr,rw,locality)	344	#define ecb_prefetch(addr,rw,locality)
180	#endif	345	#endif
181		346
182	/* no emulation for ecb_decltype */	347	/* no emulation for ecb_decltype */
183	#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; };
184	#define ecb_decltype(x) __decltype(x)	351	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
185	#elif ECB_GCC_VERSION(3,0)	352	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
186	#define ecb_decltype(x) __typeof(x)	353	#define ecb_decltype(x) __typeof__ (x)
187	#endif	354	#endif
188		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
189	#define ecb_noinline ecb_attribute ((__noinline__))	373	#define ecb_noinline ecb_attribute ((__noinline__))
190	#define ecb_noreturn ecb_attribute ((__noreturn__))	374	#endif
		375
191	#define ecb_unused ecb_attribute ((__unused__))	376	#define ecb_unused ecb_attribute ((__unused__))
192	#define ecb_const ecb_attribute ((__const__))	377	#define ecb_const ecb_attribute ((__const__))
193	#define ecb_pure ecb_attribute ((__pure__))	378	#define ecb_pure ecb_attribute ((__pure__))
		379
		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 */
		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)
		388	#else
		389	#define ecb_noreturn ecb_attribute ((__noreturn__))
		390	#endif
194		391
195	#if ECB_GCC_VERSION(4,3)	392	#if ECB_GCC_VERSION(4,3)
196	#define ecb_artificial ecb_attribute ((__artificial__))	393	#define ecb_artificial ecb_attribute ((__artificial__))
197	#define ecb_hot ecb_attribute ((__hot__))	394	#define ecb_hot ecb_attribute ((__hot__))
198	#define ecb_cold ecb_attribute ((__cold__))	395	#define ecb_cold ecb_attribute ((__cold__))
…		…
210	/* for compatibility to the rest of the world */	407	/* for compatibility to the rest of the world */
211	#define ecb_likely(expr) ecb_expect_true (expr)	408	#define ecb_likely(expr) ecb_expect_true (expr)
212	#define ecb_unlikely(expr) ecb_expect_false (expr)	409	#define ecb_unlikely(expr) ecb_expect_false (expr)
213		410
214	/* count trailing zero bits and count # of one bits */	411	/* count trailing zero bits and count # of one bits */
215	#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))
216	/* 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 */
217	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	417	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
218	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	418	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
219	#define ecb_ctz32(x) __builtin_ctz (x)	419	#define ecb_ctz32(x) __builtin_ctz (x)
220	#define ecb_ctz64(x) __builtin_ctzll (x)	420	#define ecb_ctz64(x) __builtin_ctzll (x)
221	#define ecb_popcount32(x) __builtin_popcount (x)	421	#define ecb_popcount32(x) __builtin_popcount (x)
222	/* no popcountll */	422	/* no popcountll */
223	#else	423	#else
224	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	424	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
225	ecb_function_ int	425	ecb_function_ ecb_const int
226	ecb_ctz32 (uint32_t x)	426	ecb_ctz32 (uint32_t x)
227	{	427	{
228	int r = 0;	428	int r = 0;
229		429
230	x &= ~x + 1; /* this isolates the lowest bit */	430	x &= ~x + 1; /* this isolates the lowest bit */
…		…
244	#endif	444	#endif
245		445
246	return r;	446	return r;
247	}	447	}
248		448
249	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
250	ecb_function_ int	450	ecb_function_ ecb_const int
251	ecb_ctz64 (uint64_t x)	451	ecb_ctz64 (uint64_t x)
252	{	452	{
253	int shift = x & 0xffffffffU ? 0 : 32;	453	int shift = x & 0xffffffff ? 0 : 32;
254	return ecb_ctz32 (x >> shift) + shift;	454	return ecb_ctz32 (x >> shift) + shift;
255	}	455	}
256		456
257	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
258	ecb_function_ int	458	ecb_function_ ecb_const int
259	ecb_popcount32 (uint32_t x)	459	ecb_popcount32 (uint32_t x)
260	{	460	{
261	x -= (x >> 1) & 0x55555555;	461	x -= (x >> 1) & 0x55555555;
262	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	462	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
263	x = ((x >> 4) + x) & 0x0f0f0f0f;	463	x = ((x >> 4) + x) & 0x0f0f0f0f;
264	x *= 0x01010101;	464	x *= 0x01010101;
265		465
266	return x >> 24;	466	return x >> 24;
267	}	467	}
268		468
269	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	469	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
270	ecb_function_ int ecb_ld32 (uint32_t x)	470	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
271	{	471	{
272	int r = 0;	472	int r = 0;
273		473
274	if (x >> 16) { x >>= 16; r += 16; }	474	if (x >> 16) { x >>= 16; r += 16; }
275	if (x >> 8) { x >>= 8; r += 8; }	475	if (x >> 8) { x >>= 8; r += 8; }
…		…
278	if (x >> 1) { r += 1; }	478	if (x >> 1) { r += 1; }
279		479
280	return r;	480	return r;
281	}	481	}
282		482
283	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	483	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
284	ecb_function_ int ecb_ld64 (uint64_t x)	484	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
285	{	485	{
286	int r = 0;	486	int r = 0;
287		487
288	if (x >> 32) { x >>= 32; r += 32; }	488	if (x >> 32) { x >>= 32; r += 32; }
289		489
290	return r + ecb_ld32 (x);	490	return r + ecb_ld32 (x);
291	}	491	}
292	#endif	492	#endif
		493
		494	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		495	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		496	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		497	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		498
		499	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
		500	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
		501	{
		502	return ( (x * 0x0802U & 0x22110U)
		503	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		504	}
		505
		506	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
		507	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
		508	{
		509	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		510	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		511	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		512	x = ( x >> 8 ) \| ( x << 8);
		513
		514	return x;
		515	}
		516
		517	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
		518	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
		519	{
		520	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		521	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		522	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		523	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		524	x = ( x >> 16 ) \| ( x << 16);
		525
		526	return x;
		527	}
293		528
294	/* popcount64 is only available on 64 bit cpus as gcc builtin */	529	/* popcount64 is only available on 64 bit cpus as gcc builtin */
295	/* so for this version we are lazy */	530	/* so for this version we are lazy */
296	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	531	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
297	ecb_function_ int	532	ecb_function_ ecb_const int
298	ecb_popcount64 (uint64_t x)	533	ecb_popcount64 (uint64_t x)
299	{	534	{
300	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	535	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
301	}	536	}
302		537
303	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);
304	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);
305	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);
306	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);
307	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);
308	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);
309	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);
310	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);
311		546
312	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); }
313	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); }
314	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); }
315	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); }
316	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); }
317	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); }
318	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); }
319	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); }
320		555
321	#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
322	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	560	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		561	#endif
323	#define ecb_bswap32(x) __builtin_bswap32 (x)	562	#define ecb_bswap32(x) __builtin_bswap32 (x)
324	#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)))
325	#else	569	#else
326	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	570	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
327	ecb_function_ uint16_t	571	ecb_function_ ecb_const uint16_t
328	ecb_bswap16 (uint16_t x)	572	ecb_bswap16 (uint16_t x)
329	{	573	{
330	return ecb_rotl16 (x, 8);	574	return ecb_rotl16 (x, 8);
331	}	575	}
332		576
333	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	577	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
334	ecb_function_ uint32_t	578	ecb_function_ ecb_const uint32_t
335	ecb_bswap32 (uint32_t x)	579	ecb_bswap32 (uint32_t x)
336	{	580	{
337	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	581	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
338	}	582	}
339		583
340	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	584	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
341	ecb_function_ uint64_t	585	ecb_function_ ecb_const uint64_t
342	ecb_bswap64 (uint64_t x)	586	ecb_bswap64 (uint64_t x)
343	{	587	{
344	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	588	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
345	}	589	}
346	#endif	590	#endif
347		591
348	#if ECB_GCC_VERSION(4,5)	592	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
349	#define ecb_unreachable() __builtin_unreachable ()	593	#define ecb_unreachable() __builtin_unreachable ()
350	#else	594	#else
351	/* 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 :/ */
352	ecb_function_ void ecb_unreachable (void) ecb_noreturn;	596	ecb_inline ecb_noreturn void ecb_unreachable (void);
353	ecb_function_ void ecb_unreachable (void) { }	597	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
354	#endif	598	#endif
355		599
356	/* try to tell the compiler that some condition is definitely true */	600	/* try to tell the compiler that some condition is definitely true */
357	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	601	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
358		602
359	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;	603	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
360	ecb_function_ unsigned char	604	ecb_inline ecb_const unsigned char
361	ecb_byteorder_helper (void)	605	ecb_byteorder_helper (void)
362	{	606	{
363	const uint32_t u = 0x11223344;	607	/* the union code still generates code under pressure in gcc, */
364	return (unsigned char )&u;	608	/* but less than using pointers, and always seems to */
		609	/* successfully return a constant. */
		610	/* the reason why we have this horrible preprocessor mess */
		611	/* is to avoid it in all cases, at least on common architectures */
		612	/* or when using a recent enough gcc version (>= 4.6) */
		613	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		614	return 0x44;
		615	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
		616	return 0x44;
		617	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
		618	return 0x11;
		619	#else
		620	union
		621	{
		622	uint32_t i;
		623	uint8_t c;
		624	} u = { 0x11223344 };
		625	return u.c;
		626	#endif
365	}	627	}
366		628
367	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;	629	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
368	ecb_function_ 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; }
369	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;	631	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
370	ecb_function_ 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; }
371		633
372	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	634	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
373	#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))
374	#else	636	#else
375	#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)))
376	#endif	638	#endif
377		639
		640	#if ECB_CPP
		641	template<typename T>
		642	static inline T ecb_div_rd (T val, T div)
		643	{
		644	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		645	}
		646	template<typename T>
		647	static inline T ecb_div_ru (T val, T div)
		648	{
		649	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		650	}
		651	#else
378	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))	652	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
379	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))	653	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		654	#endif
380		655
381	#if ecb_cplusplus_does_not_suck	656	#if ecb_cplusplus_does_not_suck
382	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */	657	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
383	template<typename T, int N>	658	template<typename T, int N>
384	static inline int ecb_array_length (const T (&arr)[N])	659	static inline int ecb_array_length (const T (&arr)[N])
…		…
387	}	662	}
388	#else	663	#else
389	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	664	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
390	#endif	665	#endif
391		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 and subnormals */
		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	m \|= 0x00800000; /* make implicit bit explicit */
		739
		740	/* very tricky - we need to round to the nearest e (+10) bit value */
		741	{
		742	unsigned int bits = 14 - e;
		743	unsigned int half = (1 << (bits - 1)) - 1;
		744	unsigned int even = (m >> bits) & 1;
		745
		746	/* if this overflows, we will end up with a normalised number */
		747	m = (m + half + even) >> bits;
		748	}
		749
		750	return s \| m;
		751	}
		752
		753	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		754	m >>= 13;
		755
		756	return s \| 0x7c00 \| m \| !m;
		757	}
		758
		759	/*******************************************************************************/
		760	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		761
		762	/* basically, everything uses "ieee pure-endian" floating point numbers */
		763	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		764	#if 0 \
		765	\|\| __i386 \|\| __i386__ \
		766	\|\| ECB_GCC_AMD64 \
		767	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		768	\|\| defined __s390__ \|\| defined __s390x__ \
		769	\|\| defined __mips__ \
		770	\|\| defined __alpha__ \
		771	\|\| defined __hppa__ \
		772	\|\| defined __ia64__ \
		773	\|\| defined __m68k__ \
		774	\|\| defined __m88k__ \
		775	\|\| defined __sh__ \
		776	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		777	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		778	\|\| defined __aarch64__
		779	#define ECB_STDFP 1
		780	#include <string.h> /* for memcpy */
		781	#else
		782	#define ECB_STDFP 0
		783	#endif
		784
		785	#ifndef ECB_NO_LIBM
		786
		787	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		788
		789	/* only the oldest of old doesn't have this one. solaris. */
		790	#ifdef INFINITY
		791	#define ECB_INFINITY INFINITY
		792	#else
		793	#define ECB_INFINITY HUGE_VAL
392	#endif	794	#endif
393		795
		796	#ifdef NAN
		797	#define ECB_NAN NAN
		798	#else
		799	#define ECB_NAN ECB_INFINITY
		800	#endif
		801
		802	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		803	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		804	#define ecb_frexpf(x,e) frexpf ((x), (e))
		805	#else
		806	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		807	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		808	#endif
		809
		810	/* convert a float to ieee single/binary32 */
		811	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		812	ecb_function_ ecb_const uint32_t
		813	ecb_float_to_binary32 (float x)
		814	{
		815	uint32_t r;
		816
		817	#if ECB_STDFP
		818	memcpy (&r, &x, 4);
		819	#else
		820	/* slow emulation, works for anything but -0 */
		821	uint32_t m;
		822	int e;
		823
		824	if (x == 0e0f ) return 0x00000000U;
		825	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		826	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		827	if (x != x ) return 0x7fbfffffU;
		828
		829	m = ecb_frexpf (x, &e) * 0x1000000U;
		830
		831	r = m & 0x80000000U;
		832
		833	if (r)
		834	m = -m;
		835
		836	if (e <= -126)
		837	{
		838	m &= 0xffffffU;
		839	m >>= (-125 - e);
		840	e = -126;
		841	}
		842
		843	r \|= (e + 126) << 23;
		844	r \|= m & 0x7fffffU;
		845	#endif
		846
		847	return r;
		848	}
		849
		850	/* converts an ieee single/binary32 to a float */
		851	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		852	ecb_function_ ecb_const float
		853	ecb_binary32_to_float (uint32_t x)
		854	{
		855	float r;
		856
		857	#if ECB_STDFP
		858	memcpy (&r, &x, 4);
		859	#else
		860	/* emulation, only works for normals and subnormals and +0 */
		861	int neg = x >> 31;
		862	int e = (x >> 23) & 0xffU;
		863
		864	x &= 0x7fffffU;
		865
		866	if (e)
		867	x \|= 0x800000U;
		868	else
		869	e = 1;
		870
		871	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		872	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		873
		874	r = neg ? -r : r;
		875	#endif
		876
		877	return r;
		878	}
		879
		880	/* convert a double to ieee double/binary64 */
		881	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		882	ecb_function_ ecb_const uint64_t
		883	ecb_double_to_binary64 (double x)
		884	{
		885	uint64_t r;
		886
		887	#if ECB_STDFP
		888	memcpy (&r, &x, 8);
		889	#else
		890	/* slow emulation, works for anything but -0 */
		891	uint64_t m;
		892	int e;
		893
		894	if (x == 0e0 ) return 0x0000000000000000U;
		895	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		896	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		897	if (x != x ) return 0X7ff7ffffffffffffU;
		898
		899	m = frexp (x, &e) * 0x20000000000000U;
		900
		901	r = m & 0x8000000000000000;;
		902
		903	if (r)
		904	m = -m;
		905
		906	if (e <= -1022)
		907	{
		908	m &= 0x1fffffffffffffU;
		909	m >>= (-1021 - e);
		910	e = -1022;
		911	}
		912
		913	r \|= ((uint64_t)(e + 1022)) << 52;
		914	r \|= m & 0xfffffffffffffU;
		915	#endif
		916
		917	return r;
		918	}
		919
		920	/* converts an ieee double/binary64 to a double */
		921	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		922	ecb_function_ ecb_const double
		923	ecb_binary64_to_double (uint64_t x)
		924	{
		925	double r;
		926
		927	#if ECB_STDFP
		928	memcpy (&r, &x, 8);
		929	#else
		930	/* emulation, only works for normals and subnormals and +0 */
		931	int neg = x >> 63;
		932	int e = (x >> 52) & 0x7ffU;
		933
		934	x &= 0xfffffffffffffU;
		935
		936	if (e)
		937	x \|= 0x10000000000000U;
		938	else
		939	e = 1;
		940
		941	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		942	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		943
		944	r = neg ? -r : r;
		945	#endif
		946
		947	return r;
		948	}
		949
		950	/* convert a float to ieee half/binary16 */
		951	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		952	ecb_function_ ecb_const uint16_t
		953	ecb_float_to_binary16 (float x)
		954	{
		955	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		956	}
		957
		958	/* convert an ieee half/binary16 to float */
		959	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		960	ecb_function_ ecb_const float
		961	ecb_binary16_to_float (uint16_t x)
		962	{
		963	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		964	}
		965
		966	#endif
		967
		968	#endif
		969

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libecb/ecb.h (file contents): Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs. Revision 1.168 by root, Sat Nov 21 18:09:36 2015 UTC

Diff Legend

Comparing libecb/ecb.h (file contents):
Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs.
Revision 1.168 by root, Sat Nov 21 18:09:36 2015 UTC