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

Comparing libecb/ecb.h (file contents):
Revision 1.63 by root, Thu Aug 4 14:37:46 2011 UTC vs.
Revision 1.177 by root, Mon Nov 19 00:27:38 2018 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 (defined INTPTR_MAX ? INTPTR_MAX : ULONG_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	#define ECB_CPP14 (__cplusplus >= 201402L)
		121	#define ECB_CPP17 (__cplusplus >= 201703L)
		122
		123	#if ECB_CPP
		124	#define ECB_C 0
		125	#define ECB_STDC_VERSION 0
		126	#else
		127	#define ECB_C 1
		128	#define ECB_STDC_VERSION __STDC_VERSION__
		129	#endif
		130
		131	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		132	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		133	#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
		134
		135	#if ECB_CPP
		136	#define ECB_EXTERN_C extern "C"
		137	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		138	#define ECB_EXTERN_C_END }
		139	#else
		140	#define ECB_EXTERN_C extern
		141	#define ECB_EXTERN_C_BEG
		142	#define ECB_EXTERN_C_END
64	#endif	143	#endif
65		144
66	/*****************************************************************************/	145	/*****************************************************************************/
67		146
68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	147	/* 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 */	148	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70		149
71	#if ECB_NO_THREADS \|\| ECB_NO_SMP	150	#if ECB_NO_THREADS
		151	#define ECB_NO_SMP 1
		152	#endif
		153
		154	#if ECB_NO_SMP
72	#define ECB_MEMORY_FENCE do { } while (0)	155	#define ECB_MEMORY_FENCE do { } while (0)
73	#define ECB_MEMORY_FENCE_ACQUIRE do { } while (0)	156	#endif
74	#define ECB_MEMORY_FENCE_RELEASE do { } while (0)	157
		158	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		159	#if __xlC__ && ECB_CPP
		160	#include <builtins.h>
		161	#endif
		162
		163	#if 1400 <= _MSC_VER
		164	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
75	#endif	165	#endif
76		166
77	#ifndef ECB_MEMORY_FENCE	167	#ifndef ECB_MEMORY_FENCE
78	#if ECB_GCC_VERSION(2,5)	168	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
79	#if __x86	169	#if __i386 \|\| __i386__
80	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	170	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
81	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	171	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
82	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	172	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
83	#elif __amd64	173	#elif ECB_GCC_AMD64
84	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	174	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
85	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	175	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
86	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	176	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
87	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	177	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
88	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	178	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		179	#elif defined __ARM_ARCH_2__ \
		180	\|\| defined __ARM_ARCH_3__ \|\| defined __ARM_ARCH_3M__ \
		181	\|\| defined __ARM_ARCH_4__ \|\| defined __ARM_ARCH_4T__ \
		182	\|\| defined __ARM_ARCH_5__ \|\| defined __ARM_ARCH_5E__ \
		183	\|\| defined __ARM_ARCH_5T__ \|\| defined __ARM_ARCH_5TE__ \
		184	\|\| defined __ARM_ARCH_5TEJ__
		185	/* should not need any, unless running old code on newer cpu - arm doesn't support that */
89	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \	186	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
90	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__) \	187	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__ \
		188	\|\| defined __ARM_ARCH_6T2__
		189	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		190	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
91	\|\| defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \	191	\|\| defined __ARM_ARCH_7R__ \|\| defined __ARM_ARCH_7M__
92	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )	192	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
93	#define ECB_MEMORY_FENCE \	193	#elif __aarch64__
94	do { \	194	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
95	int null = 0; \	195	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
96	__asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \	196	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
97	while (0)	197	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		198	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		199	#elif defined __s390__ \|\| defined __s390x__
		200	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		201	#elif defined __mips__
		202	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		203	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
		204	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		205	#elif defined __alpha__
		206	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		207	#elif defined __hppa__
		208	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		209	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		210	#elif defined __ia64__
		211	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		212	#elif defined __m68k__
		213	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		214	#elif defined __m88k__
		215	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		216	#elif defined __sh__
		217	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
98	#endif	218	#endif
99	#endif	219	#endif
100	#endif	220	#endif
101		221
102	#ifndef ECB_MEMORY_FENCE	222	#ifndef ECB_MEMORY_FENCE
		223	#if ECB_GCC_VERSION(4,7)
		224	/* see comment below (stdatomic.h) about the C11 memory model. */
		225	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		226	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		227	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		228
		229	#elif ECB_CLANG_EXTENSION(c_atomic)
		230	/* see comment below (stdatomic.h) about the C11 memory model. */
		231	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		232	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		233	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		234
103	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER)	235	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
104	#define ECB_MEMORY_FENCE __sync_synchronize ()	236	#define ECB_MEMORY_FENCE __sync_synchronize ()
105	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	237	#elif _MSC_VER >= 1500 /* VC++ 2008 */
106	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	238	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		239	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		240	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		241	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		242	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
107	#elif _MSC_VER >= 1400 /* VC++ 2005 */	243	#elif _MSC_VER >= 1400 /* VC++ 2005 */
108	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	244	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
109	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	245	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
110	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	246	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
111	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	247	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
112	#elif defined(_WIN32)	248	#elif defined _WIN32
113	#include <WinNT.h>	249	#include <WinNT.h>
114	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	250	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		251	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		252	#include <mbarrier.h>
		253	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		254	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		255	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		256	#elif __xlC__
		257	#define ECB_MEMORY_FENCE __sync ()
		258	#endif
		259	#endif
		260
		261	#ifndef ECB_MEMORY_FENCE
		262	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		263	/* we assume that these memory fences work on all variables/all memory accesses, */
		264	/* not just C11 atomics and atomic accesses */
		265	#include <stdatomic.h>
		266	/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
		267	/* any fence other than seq_cst, which isn't very efficient for us. */
		268	/* Why that is, we don't know - either the C11 memory model is quite useless */
		269	/* for most usages, or gcc and clang have a bug */
		270	/* I currently lean towards the latter, and inefficiently implement */
		271	/* all three of ecb's fences as a seq_cst fence */
		272	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		273	/* for all __atomic_thread_fence's except seq_cst */
		274	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
115	#endif	275	#endif
116	#endif	276	#endif
117		277
118	#ifndef ECB_MEMORY_FENCE	278	#ifndef ECB_MEMORY_FENCE
119	#if !ECB_AVOID_PTHREADS	279	#if !ECB_AVOID_PTHREADS
…		…
131	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;	291	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
132	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)	292	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
133	#endif	293	#endif
134	#endif	294	#endif
135		295
136	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)	296	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
137	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE	297	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
138	#endif	298	#endif
139		299
140	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)	300	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
141	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	301	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
142	#endif	302	#endif
143		303
144	/*****************************************************************************/	304	/*****************************************************************************/
145		305
146	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	306	#if ECB_CPP
147
148	#if __cplusplus
149	#define ecb_inline static inline	307	#define ecb_inline static inline
150	#elif ECB_GCC_VERSION(2,5)	308	#elif ECB_GCC_VERSION(2,5)
151	#define ecb_inline static __inline__	309	#define ecb_inline static __inline__
152	#elif ECB_C99	310	#elif ECB_C99
153	#define ecb_inline static inline	311	#define ecb_inline static inline
…		…
167		325
168	#define ECB_CONCAT_(a, b) a ## b	326	#define ECB_CONCAT_(a, b) a ## b
169	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	327	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
170	#define ECB_STRINGIFY_(a) # a	328	#define ECB_STRINGIFY_(a) # a
171	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	329	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		330	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
172		331
173	#define ecb_function_ ecb_inline	332	#define ecb_function_ ecb_inline
174		333
175	#if ECB_GCC_VERSION(3,1)	334	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
176	#define ecb_attribute(attrlist) __attribute__(attrlist)	335	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		336	#else
		337	#define ecb_attribute(attrlist)
		338	#endif
		339
		340	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
177	#define ecb_is_constant(expr) __builtin_constant_p (expr)	341	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		342	#else
		343	/* possible C11 impl for integral types
		344	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		345	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		346
		347	#define ecb_is_constant(expr) 0
		348	#endif
		349
		350	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
178	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	351	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		352	#else
		353	#define ecb_expect(expr,value) (expr)
		354	#endif
		355
		356	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
179	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	357	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
180	#else	358	#else
181	#define ecb_attribute(attrlist)
182	#define ecb_is_constant(expr) 0
183	#define ecb_expect(expr,value) (expr)
184	#define ecb_prefetch(addr,rw,locality)	359	#define ecb_prefetch(addr,rw,locality)
185	#endif	360	#endif
186		361
187	/* no emulation for ecb_decltype */	362	/* no emulation for ecb_decltype */
188	#if ECB_GCC_VERSION(4,5)	363	#if ECB_CPP11
		364	// older implementations might have problems with decltype(x)::type, work around it
		365	template<class T> struct ecb_decltype_t { typedef T type; };
189	#define ecb_decltype(x) __decltype(x)	366	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
190	#elif ECB_GCC_VERSION(3,0)	367	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
191	#define ecb_decltype(x) __typeof(x)	368	#define ecb_decltype(x) __typeof__ (x)
192	#endif	369	#endif
193		370
		371	#if _MSC_VER >= 1300
		372	#define ecb_deprecated __declspec (deprecated)
		373	#else
		374	#define ecb_deprecated ecb_attribute ((__deprecated__))
		375	#endif
		376
		377	#if _MSC_VER >= 1500
		378	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		379	#elif ECB_GCC_VERSION(4,5)
		380	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		381	#else
		382	#define ecb_deprecated_message(msg) ecb_deprecated
		383	#endif
		384
		385	#if _MSC_VER >= 1400
		386	#define ecb_noinline __declspec (noinline)
		387	#else
194	#define ecb_noinline ecb_attribute ((__noinline__))	388	#define ecb_noinline ecb_attribute ((__noinline__))
195	#define ecb_noreturn ecb_attribute ((__noreturn__))	389	#endif
		390
196	#define ecb_unused ecb_attribute ((__unused__))	391	#define ecb_unused ecb_attribute ((__unused__))
197	#define ecb_const ecb_attribute ((__const__))	392	#define ecb_const ecb_attribute ((__const__))
198	#define ecb_pure ecb_attribute ((__pure__))	393	#define ecb_pure ecb_attribute ((__pure__))
		394
		395	#if ECB_C11 \|\| __IBMC_NORETURN
		396	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		397	#define ecb_noreturn _Noreturn
		398	#elif ECB_CPP11
		399	#define ecb_noreturn [[noreturn]]
		400	#elif _MSC_VER >= 1200
		401	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		402	#define ecb_noreturn __declspec (noreturn)
		403	#else
		404	#define ecb_noreturn ecb_attribute ((__noreturn__))
		405	#endif
199		406
200	#if ECB_GCC_VERSION(4,3)	407	#if ECB_GCC_VERSION(4,3)
201	#define ecb_artificial ecb_attribute ((__artificial__))	408	#define ecb_artificial ecb_attribute ((__artificial__))
202	#define ecb_hot ecb_attribute ((__hot__))	409	#define ecb_hot ecb_attribute ((__hot__))
203	#define ecb_cold ecb_attribute ((__cold__))	410	#define ecb_cold ecb_attribute ((__cold__))
…		…
215	/* for compatibility to the rest of the world */	422	/* for compatibility to the rest of the world */
216	#define ecb_likely(expr) ecb_expect_true (expr)	423	#define ecb_likely(expr) ecb_expect_true (expr)
217	#define ecb_unlikely(expr) ecb_expect_false (expr)	424	#define ecb_unlikely(expr) ecb_expect_false (expr)
218		425
219	/* count trailing zero bits and count # of one bits */	426	/* count trailing zero bits and count # of one bits */
220	#if ECB_GCC_VERSION(3,4)	427	#if ECB_GCC_VERSION(3,4) \
		428	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		429	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		430	&& ECB_CLANG_BUILTIN(__builtin_popcount))
221	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	431	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
222	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	432	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
223	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	433	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
224	#define ecb_ctz32(x) __builtin_ctz (x)	434	#define ecb_ctz32(x) __builtin_ctz (x)
225	#define ecb_ctz64(x) __builtin_ctzll (x)	435	#define ecb_ctz64(x) __builtin_ctzll (x)
226	#define ecb_popcount32(x) __builtin_popcount (x)	436	#define ecb_popcount32(x) __builtin_popcount (x)
227	/* no popcountll */	437	/* no popcountll */
228	#else	438	#else
229	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	439	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
230	ecb_function_ int	440	ecb_function_ ecb_const int
231	ecb_ctz32 (uint32_t x)	441	ecb_ctz32 (uint32_t x)
232	{	442	{
		443	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		444	unsigned long r;
		445	_BitScanForward (&r, x);
		446	return (int)r;
		447	#else
233	int r = 0;	448	int r = 0;
234		449
235	x &= ~x + 1; /* this isolates the lowest bit */	450	x &= ~x + 1; /* this isolates the lowest bit */
236		451
237	#if ECB_branchless_on_i386	452	#if ECB_branchless_on_i386
…		…
247	if (x & 0xff00ff00) r += 8;	462	if (x & 0xff00ff00) r += 8;
248	if (x & 0xffff0000) r += 16;	463	if (x & 0xffff0000) r += 16;
249	#endif	464	#endif
250		465
251	return r;	466	return r;
		467	#endif
252	}	468	}
253		469
254	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	470	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
255	ecb_function_ int	471	ecb_function_ ecb_const int
256	ecb_ctz64 (uint64_t x)	472	ecb_ctz64 (uint64_t x)
257	{	473	{
		474	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		475	unsigned long r;
		476	_BitScanForward64 (&r, x);
		477	return (int)r;
		478	#else
258	int shift = x & 0xffffffffU ? 0 : 32;	479	int shift = x & 0xffffffff ? 0 : 32;
259	return ecb_ctz32 (x >> shift) + shift;	480	return ecb_ctz32 (x >> shift) + shift;
		481	#endif
260	}	482	}
261		483
262	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	484	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
263	ecb_function_ int	485	ecb_function_ ecb_const int
264	ecb_popcount32 (uint32_t x)	486	ecb_popcount32 (uint32_t x)
265	{	487	{
266	x -= (x >> 1) & 0x55555555;	488	x -= (x >> 1) & 0x55555555;
267	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	489	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
268	x = ((x >> 4) + x) & 0x0f0f0f0f;	490	x = ((x >> 4) + x) & 0x0f0f0f0f;
269	x *= 0x01010101;	491	x *= 0x01010101;
270		492
271	return x >> 24;	493	return x >> 24;
272	}	494	}
273		495
274	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	496	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
275	ecb_function_ int ecb_ld32 (uint32_t x)	497	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
276	{	498	{
		499	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		500	unsigned long r;
		501	_BitScanReverse (&r, x);
		502	return (int)r;
		503	#else
277	int r = 0;	504	int r = 0;
278		505
279	if (x >> 16) { x >>= 16; r += 16; }	506	if (x >> 16) { x >>= 16; r += 16; }
280	if (x >> 8) { x >>= 8; r += 8; }	507	if (x >> 8) { x >>= 8; r += 8; }
281	if (x >> 4) { x >>= 4; r += 4; }	508	if (x >> 4) { x >>= 4; r += 4; }
282	if (x >> 2) { x >>= 2; r += 2; }	509	if (x >> 2) { x >>= 2; r += 2; }
283	if (x >> 1) { r += 1; }	510	if (x >> 1) { r += 1; }
284		511
285	return r;	512	return r;
		513	#endif
286	}	514	}
287		515
288	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	516	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
289	ecb_function_ int ecb_ld64 (uint64_t x)	517	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
290	{	518	{
		519	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		520	unsigned long r;
		521	_BitScanReverse64 (&r, x);
		522	return (int)r;
		523	#else
291	int r = 0;	524	int r = 0;
292		525
293	if (x >> 32) { x >>= 32; r += 32; }	526	if (x >> 32) { x >>= 32; r += 32; }
294		527
295	return r + ecb_ld32 (x);	528	return r + ecb_ld32 (x);
296	}
297	#endif	529	#endif
		530	}
		531	#endif
		532
		533	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		534	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		535	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		536	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		537
		538	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
		539	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
		540	{
		541	return ( (x * 0x0802U & 0x22110U)
		542	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		543	}
		544
		545	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
		546	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
		547	{
		548	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		549	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		550	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		551	x = ( x >> 8 ) \| ( x << 8);
		552
		553	return x;
		554	}
		555
		556	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
		557	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
		558	{
		559	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		560	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		561	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		562	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		563	x = ( x >> 16 ) \| ( x << 16);
		564
		565	return x;
		566	}
298		567
299	/* popcount64 is only available on 64 bit cpus as gcc builtin */	568	/* popcount64 is only available on 64 bit cpus as gcc builtin */
300	/* so for this version we are lazy */	569	/* so for this version we are lazy */
301	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	570	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
302	ecb_function_ int	571	ecb_function_ ecb_const int
303	ecb_popcount64 (uint64_t x)	572	ecb_popcount64 (uint64_t x)
304	{	573	{
305	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	574	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
306	}	575	}
307		576
308	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	577	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
309	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	578	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
310	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	579	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
311	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	580	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
312	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	581	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
313	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	582	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
314	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	583	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
315	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	584	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
316		585
317	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	586	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
318	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	587	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
319	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	588	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
320	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	589	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
321	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	590	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
322	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	591	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
323	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	592	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
324	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	593	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
325		594
326	#if ECB_GCC_VERSION(4,3)	595	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		596	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		597	#define ecb_bswap16(x) __builtin_bswap16 (x)
		598	#else
327	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	599	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		600	#endif
328	#define ecb_bswap32(x) __builtin_bswap32 (x)	601	#define ecb_bswap32(x) __builtin_bswap32 (x)
329	#define ecb_bswap64(x) __builtin_bswap64 (x)	602	#define ecb_bswap64(x) __builtin_bswap64 (x)
		603	#elif _MSC_VER
		604	#include <stdlib.h>
		605	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		606	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		607	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
330	#else	608	#else
331	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	609	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
332	ecb_function_ uint16_t	610	ecb_function_ ecb_const uint16_t
333	ecb_bswap16 (uint16_t x)	611	ecb_bswap16 (uint16_t x)
334	{	612	{
335	return ecb_rotl16 (x, 8);	613	return ecb_rotl16 (x, 8);
336	}	614	}
337		615
338	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	616	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
339	ecb_function_ uint32_t	617	ecb_function_ ecb_const uint32_t
340	ecb_bswap32 (uint32_t x)	618	ecb_bswap32 (uint32_t x)
341	{	619	{
342	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	620	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
343	}	621	}
344		622
345	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	623	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
346	ecb_function_ uint64_t	624	ecb_function_ ecb_const uint64_t
347	ecb_bswap64 (uint64_t x)	625	ecb_bswap64 (uint64_t x)
348	{	626	{
349	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	627	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
350	}	628	}
351	#endif	629	#endif
352		630
353	#if ECB_GCC_VERSION(4,5)	631	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
354	#define ecb_unreachable() __builtin_unreachable ()	632	#define ecb_unreachable() __builtin_unreachable ()
355	#else	633	#else
356	/* this seems to work fine, but gcc always emits a warning for it :/ */	634	/* this seems to work fine, but gcc always emits a warning for it :/ */
357	ecb_function_ void ecb_unreachable (void) ecb_noreturn;	635	ecb_inline ecb_noreturn void ecb_unreachable (void);
358	ecb_function_ void ecb_unreachable (void) { }	636	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
359	#endif	637	#endif
360		638
361	/* try to tell the compiler that some condition is definitely true */	639	/* try to tell the compiler that some condition is definitely true */
362	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	640	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
363		641
364	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;	642	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
365	ecb_function_ unsigned char	643	ecb_inline ecb_const uint32_t
366	ecb_byteorder_helper (void)	644	ecb_byteorder_helper (void)
367	{	645	{
368	const uint32_t u = 0x11223344;	646	/* the union code still generates code under pressure in gcc, */
369	return (unsigned char )&u;	647	/* but less than using pointers, and always seems to */
		648	/* successfully return a constant. */
		649	/* the reason why we have this horrible preprocessor mess */
		650	/* is to avoid it in all cases, at least on common architectures */
		651	/* or when using a recent enough gcc version (>= 4.6) */
		652	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		653	\|\| ((__i386 \|\| __i386__ \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64) && !__VOS__)
		654	#define ECB_LITTLE_ENDIAN 1
		655	return 0x44332211;
		656	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		657	\|\| ((__AARCH64EB__ \|\| __MIPSEB__ \|\| __ARMEB__) && !__VOS__)
		658	#define ECB_BIG_ENDIAN 1
		659	return 0x11223344;
		660	#else
		661	union
		662	{
		663	uint8_t c[4];
		664	uint32_t u;
		665	} u = { 0x11, 0x22, 0x33, 0x44 };
		666	return u.u;
		667	#endif
370	}	668	}
371		669
372	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;	670	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
373	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	671	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
374	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;	672	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
375	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	673	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
376		674
377	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	675	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
378	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	676	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
379	#else	677	#else
380	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	678	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		679	#endif
		680
		681	#if ECB_CPP
		682	template<typename T>
		683	static inline T ecb_div_rd (T val, T div)
		684	{
		685	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		686	}
		687	template<typename T>
		688	static inline T ecb_div_ru (T val, T div)
		689	{
		690	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		691	}
		692	#else
		693	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		694	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
381	#endif	695	#endif
382		696
383	#if ecb_cplusplus_does_not_suck	697	#if ecb_cplusplus_does_not_suck
384	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */	698	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
385	template<typename T, int N>	699	template<typename T, int N>
…		…
389	}	703	}
390	#else	704	#else
391	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	705	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
392	#endif	706	#endif
393		707
		708	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		709	ecb_function_ ecb_const uint32_t
		710	ecb_binary16_to_binary32 (uint32_t x)
		711	{
		712	unsigned int s = (x & 0x8000) << (31 - 15);
		713	int e = (x >> 10) & 0x001f;
		714	unsigned int m = x & 0x03ff;
		715
		716	if (ecb_expect_false (e == 31))
		717	/* infinity or NaN */
		718	e = 255 - (127 - 15);
		719	else if (ecb_expect_false (!e))
		720	{
		721	if (ecb_expect_true (!m))
		722	/* zero, handled by code below by forcing e to 0 */
		723	e = 0 - (127 - 15);
		724	else
		725	{
		726	/* subnormal, renormalise */
		727	unsigned int s = 10 - ecb_ld32 (m);
		728
		729	m = (m << s) & 0x3ff; /* mask implicit bit */
		730	e -= s - 1;
		731	}
		732	}
		733
		734	/* e and m now are normalised, or zero, (or inf or nan) */
		735	e += 127 - 15;
		736
		737	return s \| (e << 23) \| (m << (23 - 10));
		738	}
		739
		740	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		741	ecb_function_ ecb_const uint16_t
		742	ecb_binary32_to_binary16 (uint32_t x)
		743	{
		744	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		745	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		746	unsigned int m = x & 0x007fffff;
		747
		748	x &= 0x7fffffff;
		749
		750	/* if it's within range of binary16 normals, use fast path */
		751	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		752	{
		753	/* mantissa round-to-even */
		754	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		755
		756	/* handle overflow */
		757	if (ecb_expect_false (m >= 0x00800000))
		758	{
		759	m >>= 1;
		760	e += 1;
		761	}
		762
		763	return s \| (e << 10) \| (m >> (23 - 10));
		764	}
		765
		766	/* handle large numbers and infinity */
		767	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		768	return s \| 0x7c00;
		769
		770	/* handle zero, subnormals and small numbers */
		771	if (ecb_expect_true (x < 0x38800000))
		772	{
		773	/* zero */
		774	if (ecb_expect_true (!x))
		775	return s;
		776
		777	/* handle subnormals */
		778
		779	/* too small, will be zero */
		780	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		781	return s;
		782
		783	m \|= 0x00800000; /* make implicit bit explicit */
		784
		785	/* very tricky - we need to round to the nearest e (+10) bit value */
		786	{
		787	unsigned int bits = 14 - e;
		788	unsigned int half = (1 << (bits - 1)) - 1;
		789	unsigned int even = (m >> bits) & 1;
		790
		791	/* if this overflows, we will end up with a normalised number */
		792	m = (m + half + even) >> bits;
		793	}
		794
		795	return s \| m;
		796	}
		797
		798	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		799	m >>= 13;
		800
		801	return s \| 0x7c00 \| m \| !m;
		802	}
		803
		804	/*******************************************************************************/
		805	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		806
		807	/* basically, everything uses "ieee pure-endian" floating point numbers */
		808	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		809	#if 0 \
		810	\|\| __i386 \|\| __i386__ \
		811	\|\| ECB_GCC_AMD64 \
		812	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		813	\|\| defined __s390__ \|\| defined __s390x__ \
		814	\|\| defined __mips__ \
		815	\|\| defined __alpha__ \
		816	\|\| defined __hppa__ \
		817	\|\| defined __ia64__ \
		818	\|\| defined __m68k__ \
		819	\|\| defined __m88k__ \
		820	\|\| defined __sh__ \
		821	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		822	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		823	\|\| defined __aarch64__
		824	#define ECB_STDFP 1
		825	#include <string.h> /* for memcpy */
		826	#else
		827	#define ECB_STDFP 0
		828	#endif
		829
		830	#ifndef ECB_NO_LIBM
		831
		832	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		833
		834	/* only the oldest of old doesn't have this one. solaris. */
		835	#ifdef INFINITY
		836	#define ECB_INFINITY INFINITY
		837	#else
		838	#define ECB_INFINITY HUGE_VAL
394	#endif	839	#endif
395		840
		841	#ifdef NAN
		842	#define ECB_NAN NAN
		843	#else
		844	#define ECB_NAN ECB_INFINITY
		845	#endif
		846
		847	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		848	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		849	#define ecb_frexpf(x,e) frexpf ((x), (e))
		850	#else
		851	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		852	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		853	#endif
		854
		855	/* convert a float to ieee single/binary32 */
		856	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		857	ecb_function_ ecb_const uint32_t
		858	ecb_float_to_binary32 (float x)
		859	{
		860	uint32_t r;
		861
		862	#if ECB_STDFP
		863	memcpy (&r, &x, 4);
		864	#else
		865	/* slow emulation, works for anything but -0 */
		866	uint32_t m;
		867	int e;
		868
		869	if (x == 0e0f ) return 0x00000000U;
		870	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		871	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		872	if (x != x ) return 0x7fbfffffU;
		873
		874	m = ecb_frexpf (x, &e) * 0x1000000U;
		875
		876	r = m & 0x80000000U;
		877
		878	if (r)
		879	m = -m;
		880
		881	if (e <= -126)
		882	{
		883	m &= 0xffffffU;
		884	m >>= (-125 - e);
		885	e = -126;
		886	}
		887
		888	r \|= (e + 126) << 23;
		889	r \|= m & 0x7fffffU;
		890	#endif
		891
		892	return r;
		893	}
		894
		895	/* converts an ieee single/binary32 to a float */
		896	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		897	ecb_function_ ecb_const float
		898	ecb_binary32_to_float (uint32_t x)
		899	{
		900	float r;
		901
		902	#if ECB_STDFP
		903	memcpy (&r, &x, 4);
		904	#else
		905	/* emulation, only works for normals and subnormals and +0 */
		906	int neg = x >> 31;
		907	int e = (x >> 23) & 0xffU;
		908
		909	x &= 0x7fffffU;
		910
		911	if (e)
		912	x \|= 0x800000U;
		913	else
		914	e = 1;
		915
		916	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		917	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		918
		919	r = neg ? -r : r;
		920	#endif
		921
		922	return r;
		923	}
		924
		925	/* convert a double to ieee double/binary64 */
		926	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		927	ecb_function_ ecb_const uint64_t
		928	ecb_double_to_binary64 (double x)
		929	{
		930	uint64_t r;
		931
		932	#if ECB_STDFP
		933	memcpy (&r, &x, 8);
		934	#else
		935	/* slow emulation, works for anything but -0 */
		936	uint64_t m;
		937	int e;
		938
		939	if (x == 0e0 ) return 0x0000000000000000U;
		940	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		941	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		942	if (x != x ) return 0X7ff7ffffffffffffU;
		943
		944	m = frexp (x, &e) * 0x20000000000000U;
		945
		946	r = m & 0x8000000000000000;;
		947
		948	if (r)
		949	m = -m;
		950
		951	if (e <= -1022)
		952	{
		953	m &= 0x1fffffffffffffU;
		954	m >>= (-1021 - e);
		955	e = -1022;
		956	}
		957
		958	r \|= ((uint64_t)(e + 1022)) << 52;
		959	r \|= m & 0xfffffffffffffU;
		960	#endif
		961
		962	return r;
		963	}
		964
		965	/* converts an ieee double/binary64 to a double */
		966	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		967	ecb_function_ ecb_const double
		968	ecb_binary64_to_double (uint64_t x)
		969	{
		970	double r;
		971
		972	#if ECB_STDFP
		973	memcpy (&r, &x, 8);
		974	#else
		975	/* emulation, only works for normals and subnormals and +0 */
		976	int neg = x >> 63;
		977	int e = (x >> 52) & 0x7ffU;
		978
		979	x &= 0xfffffffffffffU;
		980
		981	if (e)
		982	x \|= 0x10000000000000U;
		983	else
		984	e = 1;
		985
		986	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		987	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		988
		989	r = neg ? -r : r;
		990	#endif
		991
		992	return r;
		993	}
		994
		995	/* convert a float to ieee half/binary16 */
		996	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		997	ecb_function_ ecb_const uint16_t
		998	ecb_float_to_binary16 (float x)
		999	{
		1000	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1001	}
		1002
		1003	/* convert an ieee half/binary16 to float */
		1004	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1005	ecb_function_ ecb_const float
		1006	ecb_binary16_to_float (uint16_t x)
		1007	{
		1008	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1009	}
		1010
		1011	#endif
		1012
		1013	#endif
		1014

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Comparing libecb/ecb.h (file contents): Revision 1.63 by root, Thu Aug 4 14:37:46 2011 UTC vs. Revision 1.177 by root, Mon Nov 19 00:27:38 2018 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.63 by root, Thu Aug 4 14:37:46 2011 UTC vs.
Revision 1.177 by root, Mon Nov 19 00:27:38 2018 UTC