[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 1.189 by root, Mon Jun 21 21:26:48 2021 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 (©) 2009-2015,2018-2021 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
32		43
33	#ifdef _WIN32	44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x00010009
		46
		47	#include <string.h> /* for memcpy */
		48
		49	#if defined (_WIN32) && !defined (__MINGW32__)
34	typedef signed char int8_t;	50	typedef signed char int8_t;
35	typedef unsigned char uint8_t;	51	typedef unsigned char uint8_t;
		52	typedef signed char int_fast8_t;
		53	typedef unsigned char uint_fast8_t;
36	typedef signed short int16_t;	54	typedef signed short int16_t;
37	typedef unsigned short uint16_t;	55	typedef unsigned short uint16_t;
		56	typedef signed int int_fast16_t;
		57	typedef unsigned int uint_fast16_t;
38	typedef signed int int32_t;	58	typedef signed int int32_t;
39	typedef unsigned int uint32_t;	59	typedef unsigned int uint32_t;
		60	typedef signed int int_fast32_t;
		61	typedef unsigned int uint_fast32_t;
40	#if __GNUC__	62	#if __GNUC__
41	typedef signed long long int64_t;	63	typedef signed long long int64_t;
42	typedef unsigned long long uint64_t;	64	typedef unsigned long long uint64_t;
43	#else /* _MSC_VER \|\| __BORLANDC__ */	65	#else /* _MSC_VER \|\| __BORLANDC__ */
44	typedef signed __int64 int64_t;	66	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	67	typedef unsigned __int64 uint64_t;
46	#endif	68	#endif
		69	typedef int64_t int_fast64_t;
		70	typedef uint64_t uint_fast64_t;
		71	#ifdef _WIN64
		72	#define ECB_PTRSIZE 8
		73	typedef uint64_t uintptr_t;
		74	typedef int64_t intptr_t;
		75	#else
		76	#define ECB_PTRSIZE 4
		77	typedef uint32_t uintptr_t;
		78	typedef int32_t intptr_t;
		79	#endif
47	#else	80	#else
48	#include <inttypes.h>	81	#include <inttypes.h>
		82	#if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
		83	#define ECB_PTRSIZE 8
		84	#else
		85	#define ECB_PTRSIZE 4
		86	#endif
		87	#endif
		88
		89	#define ECB_GCC_AMD64 (__amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__)
		90	#define ECB_MSVC_AMD64 (_M_AMD64 \|\| _M_X64)
		91
		92	#ifndef ECB_OPTIMIZE_SIZE
		93	#if __OPTIMIZE_SIZE__
		94	#define ECB_OPTIMIZE_SIZE 1
		95	#else
		96	#define ECB_OPTIMIZE_SIZE 0
		97	#endif
		98	#endif
		99
		100	/* work around x32 idiocy by defining proper macros */
		101	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		102	#if _ILP32
		103	#define ECB_AMD64_X32 1
		104	#else
		105	#define ECB_AMD64 1
		106	#endif
		107	#endif
		108
		109	#if ECB_PTRSIZE >= 8 \|\| ECB_AMD64_X32
		110	#define ECB_64BIT_NATIVE 1
		111	#else
		112	#define ECB_64BIT_NATIVE 0
49	#endif	113	#endif
50		114
51	/* many compilers define _GNUC_ to some versions but then only implement	115	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	116	* what their idiot authors think are the "more important" extensions,
53	* causing enormous grief in return for some better fake benchmark numbers.	117	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	118	* or so.
55	* we try to detect these and simply assume they are not gcc - if they have	119	* 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.	120	* an issue with that they should have done it right in the first place.
57	*/	121	*/
58	#ifndef ECB_GCC_VERSION
59	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)	122	#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	123	#define ECB_GCC_VERSION(major,minor) 0
61	#else	124	#else
62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	125	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63	#endif	126	#endif
		127
		128	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
		129
		130	#if __clang__ && defined __has_builtin
		131	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		132	#else
		133	#define ECB_CLANG_BUILTIN(x) 0
		134	#endif
		135
		136	#if __clang__ && defined __has_extension
		137	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		138	#else
		139	#define ECB_CLANG_EXTENSION(x) 0
		140	#endif
		141
		142	#define ECB_CPP (__cplusplus+0)
		143	#define ECB_CPP11 (__cplusplus >= 201103L)
		144	#define ECB_CPP14 (__cplusplus >= 201402L)
		145	#define ECB_CPP17 (__cplusplus >= 201703L)
		146
		147	#if ECB_CPP
		148	#define ECB_C 0
		149	#define ECB_STDC_VERSION 0
		150	#else
		151	#define ECB_C 1
		152	#define ECB_STDC_VERSION __STDC_VERSION__
		153	#endif
		154
		155	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		156	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		157	#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
		158
		159	#if ECB_CPP
		160	#define ECB_EXTERN_C extern "C"
		161	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		162	#define ECB_EXTERN_C_END }
		163	#else
		164	#define ECB_EXTERN_C extern
		165	#define ECB_EXTERN_C_BEG
		166	#define ECB_EXTERN_C_END
64	#endif	167	#endif
65		168
66	/*****************************************************************************/	169	/*****************************************************************************/
67		170
68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	171	/* 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 */	172	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70		173
71	#if ECB_NO_THREADS \|\| ECB_NO_SMP	174	#if ECB_NO_THREADS
		175	#define ECB_NO_SMP 1
		176	#endif
		177
		178	#if ECB_NO_SMP
72	#define ECB_MEMORY_FENCE do { } while (0)	179	#define ECB_MEMORY_FENCE do { } while (0)
73	#endif	180	#endif
74		181
		182	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		183	#if __xlC__ && ECB_CPP
		184	#include <builtins.h>
		185	#endif
		186
		187	#if 1400 <= _MSC_VER
		188	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
		189	#endif
		190
75	#ifndef ECB_MEMORY_FENCE	191	#ifndef ECB_MEMORY_FENCE
76	#if ECB_GCC_VERSION(2,5)	192	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		193	#define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
77	#if __i386__	194	#if __i386 \|\| __i386__
78	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	195	#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 */	196	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
80	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	197	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
81	#elif __amd64	198	#elif ECB_GCC_AMD64
82	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	199	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
83	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	200	#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 */	201	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
85	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	202	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	203	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		204	#elif defined __ARM_ARCH_2__ \
		205	\|\| defined __ARM_ARCH_3__ \|\| defined __ARM_ARCH_3M__ \
		206	\|\| defined __ARM_ARCH_4__ \|\| defined __ARM_ARCH_4T__ \
		207	\|\| defined __ARM_ARCH_5__ \|\| defined __ARM_ARCH_5E__ \
		208	\|\| defined __ARM_ARCH_5T__ \|\| defined __ARM_ARCH_5TE__ \
		209	\|\| defined __ARM_ARCH_5TEJ__
		210	/* should not need any, unless running old code on newer cpu - arm doesn't support that */
87	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \	211	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
88	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__)	212	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__ \
		213	\|\| defined __ARM_ARCH_6T2__
89	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	214	#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__ ) \	215	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
91	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )	216	\|\| defined __ARM_ARCH_7R__ \|\| defined __ARM_ARCH_7M__
92	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	217	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		218	#elif __aarch64__
		219	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		220	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
		221	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
		222	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		223	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		224	#elif defined __s390__ \|\| defined __s390x__
		225	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		226	#elif defined __mips__
		227	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		228	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
		229	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		230	#elif defined __alpha__
		231	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		232	#elif defined __hppa__
		233	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		234	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		235	#elif defined __ia64__
		236	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		237	#elif defined __m68k__
		238	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		239	#elif defined __m88k__
		240	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		241	#elif defined __sh__
		242	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
93	#endif	243	#endif
94	#endif	244	#endif
95	#endif	245	#endif
96		246
97	#ifndef ECB_MEMORY_FENCE	247	#ifndef ECB_MEMORY_FENCE
		248	#if ECB_GCC_VERSION(4,7)
		249	/* see comment below (stdatomic.h) about the C11 memory model. */
		250	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		251	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		252	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		253	#define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
		254
		255	#elif ECB_CLANG_EXTENSION(c_atomic)
		256	/* see comment below (stdatomic.h) about the C11 memory model. */
		257	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		258	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		259	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		260	#define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
		261
98	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER)	262	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
99	#define ECB_MEMORY_FENCE __sync_synchronize ()	263	#define ECB_MEMORY_FENCE __sync_synchronize ()
100	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	264	#elif _MSC_VER >= 1500 /* VC++ 2008 */
101	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	265	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		266	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		267	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		268	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		269	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
102	#elif _MSC_VER >= 1400 /* VC++ 2005 */	270	#elif _MSC_VER >= 1400 /* VC++ 2005 */
103	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	271	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
104	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	272	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
105	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	273	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
106	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	274	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
107	#elif defined(_WIN32)	275	#elif defined _WIN32
108	#include <WinNT.h>	276	#include <WinNT.h>
109	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	277	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		278	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		279	#include <mbarrier.h>
		280	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		281	#define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
		282	#define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
		283	#define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
		284	#elif __xlC__
		285	#define ECB_MEMORY_FENCE __sync ()
		286	#endif
		287	#endif
		288
		289	#ifndef ECB_MEMORY_FENCE
		290	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		291	/* we assume that these memory fences work on all variables/all memory accesses, */
		292	/* not just C11 atomics and atomic accesses */
		293	#include <stdatomic.h>
		294	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		295	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		296	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
110	#endif	297	#endif
111	#endif	298	#endif
112		299
113	#ifndef ECB_MEMORY_FENCE	300	#ifndef ECB_MEMORY_FENCE
114	#if !ECB_AVOID_PTHREADS	301	#if !ECB_AVOID_PTHREADS
…		…
126	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;	313	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)	314	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
128	#endif	315	#endif
129	#endif	316	#endif
130		317
131	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)	318	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
132	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE	319	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
133	#endif	320	#endif
134		321
135	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)	322	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
136	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	323	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
137	#endif	324	#endif
138		325
		326	#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
		327	#define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
		328	#endif
		329
139	/*****************************************************************************/	330	/*****************************************************************************/
140		331
141	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	332	#if ECB_CPP
142
143	#if __cplusplus
144	#define ecb_inline static inline	333	#define ecb_inline static inline
145	#elif ECB_GCC_VERSION(2,5)	334	#elif ECB_GCC_VERSION(2,5)
146	#define ecb_inline static __inline__	335	#define ecb_inline static __inline__
147	#elif ECB_C99	336	#elif ECB_C99
148	#define ecb_inline static inline	337	#define ecb_inline static inline
…		…
162		351
163	#define ECB_CONCAT_(a, b) a ## b	352	#define ECB_CONCAT_(a, b) a ## b
164	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	353	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
165	#define ECB_STRINGIFY_(a) # a	354	#define ECB_STRINGIFY_(a) # a
166	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	355	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		356	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
167		357
168	#define ecb_function_ ecb_inline	358	#define ecb_function_ ecb_inline
169		359
170	#if ECB_GCC_VERSION(3,1)	360	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
171	#define ecb_attribute(attrlist) __attribute__(attrlist)	361	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		362	#else
		363	#define ecb_attribute(attrlist)
		364	#endif
		365
		366	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
172	#define ecb_is_constant(expr) __builtin_constant_p (expr)	367	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		368	#else
		369	/* possible C11 impl for integral types
		370	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		371	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		372
		373	#define ecb_is_constant(expr) 0
		374	#endif
		375
		376	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
173	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	377	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		378	#else
		379	#define ecb_expect(expr,value) (expr)
		380	#endif
		381
		382	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
174	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	383	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
175	#else	384	#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)	385	#define ecb_prefetch(addr,rw,locality)
180	#endif	386	#endif
181		387
182	/* no emulation for ecb_decltype */	388	/* no emulation for ecb_decltype */
183	#if ECB_GCC_VERSION(4,5)	389	#if ECB_CPP11
		390	// older implementations might have problems with decltype(x)::type, work around it
		391	template<class T> struct ecb_decltype_t { typedef T type; };
184	#define ecb_decltype(x) __decltype(x)	392	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
185	#elif ECB_GCC_VERSION(3,0)	393	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
186	#define ecb_decltype(x) __typeof(x)	394	#define ecb_decltype(x) __typeof__ (x)
187	#endif	395	#endif
188		396
		397	#if _MSC_VER >= 1300
		398	#define ecb_deprecated __declspec (deprecated)
		399	#else
		400	#define ecb_deprecated ecb_attribute ((__deprecated__))
		401	#endif
		402
		403	#if _MSC_VER >= 1500
		404	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		405	#elif ECB_GCC_VERSION(4,5)
		406	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		407	#else
		408	#define ecb_deprecated_message(msg) ecb_deprecated
		409	#endif
		410
		411	#if _MSC_VER >= 1400
		412	#define ecb_noinline __declspec (noinline)
		413	#else
189	#define ecb_noinline ecb_attribute ((__noinline__))	414	#define ecb_noinline ecb_attribute ((__noinline__))
190	#define ecb_noreturn ecb_attribute ((__noreturn__))	415	#endif
		416
191	#define ecb_unused ecb_attribute ((__unused__))	417	#define ecb_unused ecb_attribute ((__unused__))
192	#define ecb_const ecb_attribute ((__const__))	418	#define ecb_const ecb_attribute ((__const__))
193	#define ecb_pure ecb_attribute ((__pure__))	419	#define ecb_pure ecb_attribute ((__pure__))
		420
		421	#if ECB_C11 \|\| __IBMC_NORETURN
		422	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		423	#define ecb_noreturn _Noreturn
		424	#elif ECB_CPP11
		425	#define ecb_noreturn [[noreturn]]
		426	#elif _MSC_VER >= 1200
		427	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		428	#define ecb_noreturn __declspec (noreturn)
		429	#else
		430	#define ecb_noreturn ecb_attribute ((__noreturn__))
		431	#endif
194		432
195	#if ECB_GCC_VERSION(4,3)	433	#if ECB_GCC_VERSION(4,3)
196	#define ecb_artificial ecb_attribute ((__artificial__))	434	#define ecb_artificial ecb_attribute ((__artificial__))
197	#define ecb_hot ecb_attribute ((__hot__))	435	#define ecb_hot ecb_attribute ((__hot__))
198	#define ecb_cold ecb_attribute ((__cold__))	436	#define ecb_cold ecb_attribute ((__cold__))
…		…
210	/* for compatibility to the rest of the world */	448	/* for compatibility to the rest of the world */
211	#define ecb_likely(expr) ecb_expect_true (expr)	449	#define ecb_likely(expr) ecb_expect_true (expr)
212	#define ecb_unlikely(expr) ecb_expect_false (expr)	450	#define ecb_unlikely(expr) ecb_expect_false (expr)
213		451
214	/* count trailing zero bits and count # of one bits */	452	/* count trailing zero bits and count # of one bits */
215	#if ECB_GCC_VERSION(3,4)	453	#if ECB_GCC_VERSION(3,4) \
		454	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		455	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		456	&& ECB_CLANG_BUILTIN(__builtin_popcount))
216	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	457	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
217	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	458	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
218	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	459	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
219	#define ecb_ctz32(x) __builtin_ctz (x)	460	#define ecb_ctz32(x) __builtin_ctz (x)
220	#define ecb_ctz64(x) __builtin_ctzll (x)	461	#define ecb_ctz64(x) __builtin_ctzll (x)
221	#define ecb_popcount32(x) __builtin_popcount (x)	462	#define ecb_popcount32(x) __builtin_popcount (x)
222	/* no popcountll */	463	/* no popcountll */
223	#else	464	#else
224	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	465	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
225	ecb_function_ int	466	ecb_function_ ecb_const int
226	ecb_ctz32 (uint32_t x)	467	ecb_ctz32 (uint32_t x)
227	{	468	{
		469	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		470	unsigned long r;
		471	_BitScanForward (&r, x);
		472	return (int)r;
		473	#else
228	int r = 0;	474	int r = 0;
229		475
230	x &= ~x + 1; /* this isolates the lowest bit */	476	x &= ~x + 1; /* this isolates the lowest bit */
231		477
232	#if ECB_branchless_on_i386	478	#if ECB_branchless_on_i386
…		…
242	if (x & 0xff00ff00) r += 8;	488	if (x & 0xff00ff00) r += 8;
243	if (x & 0xffff0000) r += 16;	489	if (x & 0xffff0000) r += 16;
244	#endif	490	#endif
245		491
246	return r;	492	return r;
		493	#endif
247	}	494	}
248		495
249	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	496	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
250	ecb_function_ int	497	ecb_function_ ecb_const int
251	ecb_ctz64 (uint64_t x)	498	ecb_ctz64 (uint64_t x)
252	{	499	{
		500	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		501	unsigned long r;
		502	_BitScanForward64 (&r, x);
		503	return (int)r;
		504	#else
253	int shift = x & 0xffffffffU ? 0 : 32;	505	int shift = x & 0xffffffff ? 0 : 32;
254	return ecb_ctz32 (x >> shift) + shift;	506	return ecb_ctz32 (x >> shift) + shift;
		507	#endif
255	}	508	}
256		509
257	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	510	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
258	ecb_function_ int	511	ecb_function_ ecb_const int
259	ecb_popcount32 (uint32_t x)	512	ecb_popcount32 (uint32_t x)
260	{	513	{
261	x -= (x >> 1) & 0x55555555;	514	x -= (x >> 1) & 0x55555555;
262	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	515	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
263	x = ((x >> 4) + x) & 0x0f0f0f0f;	516	x = ((x >> 4) + x) & 0x0f0f0f0f;
264	x *= 0x01010101;	517	x *= 0x01010101;
265		518
266	return x >> 24;	519	return x >> 24;
267	}	520	}
268		521
269	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	522	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
270	ecb_function_ int ecb_ld32 (uint32_t x)	523	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
271	{	524	{
		525	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		526	unsigned long r;
		527	_BitScanReverse (&r, x);
		528	return (int)r;
		529	#else
272	int r = 0;	530	int r = 0;
273		531
274	if (x >> 16) { x >>= 16; r += 16; }	532	if (x >> 16) { x >>= 16; r += 16; }
275	if (x >> 8) { x >>= 8; r += 8; }	533	if (x >> 8) { x >>= 8; r += 8; }
276	if (x >> 4) { x >>= 4; r += 4; }	534	if (x >> 4) { x >>= 4; r += 4; }
277	if (x >> 2) { x >>= 2; r += 2; }	535	if (x >> 2) { x >>= 2; r += 2; }
278	if (x >> 1) { r += 1; }	536	if (x >> 1) { r += 1; }
279		537
280	return r;	538	return r;
		539	#endif
281	}	540	}
282		541
283	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	542	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
284	ecb_function_ int ecb_ld64 (uint64_t x)	543	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
285	{	544	{
		545	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		546	unsigned long r;
		547	_BitScanReverse64 (&r, x);
		548	return (int)r;
		549	#else
286	int r = 0;	550	int r = 0;
287		551
288	if (x >> 32) { x >>= 32; r += 32; }	552	if (x >> 32) { x >>= 32; r += 32; }
289		553
290	return r + ecb_ld32 (x);	554	return r + ecb_ld32 (x);
291	}
292	#endif	555	#endif
		556	}
		557	#endif
		558
		559	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		560	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		561	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		562	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		563
		564	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
		565	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
		566	{
		567	return ( (x * 0x0802U & 0x22110U)
		568	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		569	}
		570
		571	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
		572	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
		573	{
		574	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		575	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		576	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		577	x = ( x >> 8 ) \| ( x << 8);
		578
		579	return x;
		580	}
		581
		582	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
		583	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
		584	{
		585	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		586	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		587	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		588	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		589	x = ( x >> 16 ) \| ( x << 16);
		590
		591	return x;
		592	}
293		593
294	/* popcount64 is only available on 64 bit cpus as gcc builtin */	594	/* popcount64 is only available on 64 bit cpus as gcc builtin */
295	/* so for this version we are lazy */	595	/* so for this version we are lazy */
296	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	596	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
297	ecb_function_ int	597	ecb_function_ ecb_const int
298	ecb_popcount64 (uint64_t x)	598	ecb_popcount64 (uint64_t x)
299	{	599	{
300	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	600	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
301	}	601	}
302		602
303	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	603	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;	604	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;	605	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;	606	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;	607	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;	608	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;	609	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;	610	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
311		611
312	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	612	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); }	613	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); }	614	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); }	615	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); }	616	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); }	617	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); }	618	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); }	619	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
320		620
321	#if ECB_GCC_VERSION(4,3)	621	#if ECB_CPP
		622
		623	inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
		624	inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
		625	inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
		626	inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
		627
		628	inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
		629	inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
		630	inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
		631	inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
		632
		633	inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
		634	inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
		635	inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
		636	inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
		637
		638	inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
		639	inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
		640	inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
		641	inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
		642
		643	inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
		644	inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
		645	inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
		646
		647	inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
		648	inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
		649	inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
		650	inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
		651
		652	inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
		653	inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
		654	inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
		655	inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
		656
		657	#endif
		658
		659	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		660	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		661	#define ecb_bswap16(x) __builtin_bswap16 (x)
		662	#else
322	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	663	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		664	#endif
323	#define ecb_bswap32(x) __builtin_bswap32 (x)	665	#define ecb_bswap32(x) __builtin_bswap32 (x)
324	#define ecb_bswap64(x) __builtin_bswap64 (x)	666	#define ecb_bswap64(x) __builtin_bswap64 (x)
		667	#elif _MSC_VER
		668	#include <stdlib.h>
		669	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		670	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		671	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
325	#else	672	#else
326	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	673	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
327	ecb_function_ uint16_t	674	ecb_function_ ecb_const uint16_t
328	ecb_bswap16 (uint16_t x)	675	ecb_bswap16 (uint16_t x)
329	{	676	{
330	return ecb_rotl16 (x, 8);	677	return ecb_rotl16 (x, 8);
331	}	678	}
332		679
333	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	680	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
334	ecb_function_ uint32_t	681	ecb_function_ ecb_const uint32_t
335	ecb_bswap32 (uint32_t x)	682	ecb_bswap32 (uint32_t x)
336	{	683	{
337	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	684	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
338	}	685	}
339		686
340	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	687	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
341	ecb_function_ uint64_t	688	ecb_function_ ecb_const uint64_t
342	ecb_bswap64 (uint64_t x)	689	ecb_bswap64 (uint64_t x)
343	{	690	{
344	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	691	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
345	}	692	}
346	#endif	693	#endif
347		694
348	#if ECB_GCC_VERSION(4,5)	695	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
349	#define ecb_unreachable() __builtin_unreachable ()	696	#define ecb_unreachable() __builtin_unreachable ()
350	#else	697	#else
351	/* this seems to work fine, but gcc always emits a warning for it :/ */	698	/* this seems to work fine, but gcc always emits a warning for it :/ */
352	ecb_function_ void ecb_unreachable (void) ecb_noreturn;	699	ecb_inline ecb_noreturn void ecb_unreachable (void);
353	ecb_function_ void ecb_unreachable (void) { }	700	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
354	#endif	701	#endif
355		702
356	/* try to tell the compiler that some condition is definitely true */	703	/* try to tell the compiler that some condition is definitely true */
357	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	704	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
358		705
359	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;	706	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
360	ecb_function_ unsigned char	707	ecb_inline ecb_const uint32_t
361	ecb_byteorder_helper (void)	708	ecb_byteorder_helper (void)
362	{	709	{
363	const uint32_t u = 0x11223344;	710	/* the union code still generates code under pressure in gcc, */
364	return (unsigned char )&u;	711	/* but less than using pointers, and always seems to */
		712	/* successfully return a constant. */
		713	/* the reason why we have this horrible preprocessor mess */
		714	/* is to avoid it in all cases, at least on common architectures */
		715	/* or when using a recent enough gcc version (>= 4.6) */
		716	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		717	\|\| ((__i386 \|\| __i386__ \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64) && !__VOS__)
		718	#define ECB_LITTLE_ENDIAN 1
		719	return 0x44332211;
		720	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		721	\|\| ((__AARCH64EB__ \|\| __MIPSEB__ \|\| __ARMEB__) && !__VOS__)
		722	#define ECB_BIG_ENDIAN 1
		723	return 0x11223344;
		724	#else
		725	union
		726	{
		727	uint8_t c[4];
		728	uint32_t u;
		729	} u = { 0x11, 0x22, 0x33, 0x44 };
		730	return u.u;
		731	#endif
365	}	732	}
366		733
367	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;	734	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
368	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	735	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
369	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;	736	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
370	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	737	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
		738
		739	/*****************************************************************************/
		740	/* unaligned load/store */
		741
		742	ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		743	ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		744	ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		745
		746	ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		747	ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		748	ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		749
		750	ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		751	ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		752	ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		753
		754	ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
		755	ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
		756	ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
		757
		758	ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
		759	ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
		760	ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
		761
		762	ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		763	ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		764	ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		765
		766	ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		767	ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		768	ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		769
		770	ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
		771	ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
		772	ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
		773
		774	ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
		775	ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
		776	ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
		777
		778	ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
		779	ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
		780	ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
		781
		782	#if ECB_CPP
		783
		784	inline uint8_t ecb_bswap (uint8_t v) { return v; }
		785	inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
		786	inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
		787	inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
		788
		789	template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		790	template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		791	template<typename T> inline T ecb_peek (const void ptr) { return (const T *)ptr; }
		792	template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
		793	template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
		794	template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
		795	template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
		796	template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
		797
		798	template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		799	template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		800	template<typename T> inline void ecb_poke (void ptr, T v) { (T *)ptr = v; }
		801	template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
		802	template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
		803	template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
		804	template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
		805	template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
		806
		807	#endif
		808
		809	/*****************************************************************************/
		810	/* division */
371		811
372	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	812	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
		813	/* C99 tightened the definition of %, so we can use a more efficient version */
373	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	814	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
374	#else	815	#else
375	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	816	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
376	#endif	817	#endif
377		818
		819	#if ECB_CPP
		820	template<typename T>
		821	static inline T ecb_div_rd (T val, T div)
		822	{
		823	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		824	}
		825	template<typename T>
		826	static inline T ecb_div_ru (T val, T div)
		827	{
		828	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		829	}
		830	#else
378	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))	831	#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))	832	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		833	#endif
		834
		835	/*****************************************************************************/
		836	/* array length */
380		837
381	#if ecb_cplusplus_does_not_suck	838	#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) */	839	/* 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>	840	template<typename T, int N>
384	static inline int ecb_array_length (const T (&arr)[N])	841	static inline int ecb_array_length (const T (&arr)[N])
…		…
387	}	844	}
388	#else	845	#else
389	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	846	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
390	#endif	847	#endif
391		848
		849	/*****************************************************************************/
		850	/* IEEE 754-2008 half float conversions */
		851
		852	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		853	ecb_function_ ecb_const uint32_t
		854	ecb_binary16_to_binary32 (uint32_t x)
		855	{
		856	unsigned int s = (x & 0x8000) << (31 - 15);
		857	int e = (x >> 10) & 0x001f;
		858	unsigned int m = x & 0x03ff;
		859
		860	if (ecb_expect_false (e == 31))
		861	/* infinity or NaN */
		862	e = 255 - (127 - 15);
		863	else if (ecb_expect_false (!e))
		864	{
		865	if (ecb_expect_true (!m))
		866	/* zero, handled by code below by forcing e to 0 */
		867	e = 0 - (127 - 15);
		868	else
		869	{
		870	/* subnormal, renormalise */
		871	unsigned int s = 10 - ecb_ld32 (m);
		872
		873	m = (m << s) & 0x3ff; /* mask implicit bit */
		874	e -= s - 1;
		875	}
		876	}
		877
		878	/* e and m now are normalised, or zero, (or inf or nan) */
		879	e += 127 - 15;
		880
		881	return s \| (e << 23) \| (m << (23 - 10));
		882	}
		883
		884	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		885	ecb_function_ ecb_const uint16_t
		886	ecb_binary32_to_binary16 (uint32_t x)
		887	{
		888	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		889	int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		890	unsigned int m = x & 0x007fffff;
		891
		892	x &= 0x7fffffff;
		893
		894	/* if it's within range of binary16 normals, use fast path */
		895	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		896	{
		897	/* mantissa round-to-even */
		898	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		899
		900	/* handle overflow */
		901	if (ecb_expect_false (m >= 0x00800000))
		902	{
		903	m >>= 1;
		904	e += 1;
		905	}
		906
		907	return s \| (e << 10) \| (m >> (23 - 10));
		908	}
		909
		910	/* handle large numbers and infinity */
		911	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		912	return s \| 0x7c00;
		913
		914	/* handle zero, subnormals and small numbers */
		915	if (ecb_expect_true (x < 0x38800000))
		916	{
		917	/* zero */
		918	if (ecb_expect_true (!x))
		919	return s;
		920
		921	/* handle subnormals */
		922
		923	/* too small, will be zero */
		924	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		925	return s;
		926
		927	m \|= 0x00800000; /* make implicit bit explicit */
		928
		929	/* very tricky - we need to round to the nearest e (+10) bit value */
		930	{
		931	unsigned int bits = 14 - e;
		932	unsigned int half = (1 << (bits - 1)) - 1;
		933	unsigned int even = (m >> bits) & 1;
		934
		935	/* if this overflows, we will end up with a normalised number */
		936	m = (m + half + even) >> bits;
		937	}
		938
		939	return s \| m;
		940	}
		941
		942	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		943	m >>= 13;
		944
		945	return s \| 0x7c00 \| m \| !m;
		946	}
		947
		948	/*******************************************************************************/
		949	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		950
		951	/* basically, everything uses "ieee pure-endian" floating point numbers */
		952	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		953	#if 0 \
		954	\|\| __i386 \|\| __i386__ \
		955	\|\| ECB_GCC_AMD64 \
		956	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		957	\|\| defined __s390__ \|\| defined __s390x__ \
		958	\|\| defined __mips__ \
		959	\|\| defined __alpha__ \
		960	\|\| defined __hppa__ \
		961	\|\| defined __ia64__ \
		962	\|\| defined __m68k__ \
		963	\|\| defined __m88k__ \
		964	\|\| defined __sh__ \
		965	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		966	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		967	\|\| defined __aarch64__
		968	#define ECB_STDFP 1
		969	#else
		970	#define ECB_STDFP 0
		971	#endif
		972
		973	#ifndef ECB_NO_LIBM
		974
		975	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		976
		977	/* only the oldest of old doesn't have this one. solaris. */
		978	#ifdef INFINITY
		979	#define ECB_INFINITY INFINITY
		980	#else
		981	#define ECB_INFINITY HUGE_VAL
392	#endif	982	#endif
393		983
		984	#ifdef NAN
		985	#define ECB_NAN NAN
		986	#else
		987	#define ECB_NAN ECB_INFINITY
		988	#endif
		989
		990	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		991	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		992	#define ecb_frexpf(x,e) frexpf ((x), (e))
		993	#else
		994	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		995	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		996	#endif
		997
		998	/* convert a float to ieee single/binary32 */
		999	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		1000	ecb_function_ ecb_const uint32_t
		1001	ecb_float_to_binary32 (float x)
		1002	{
		1003	uint32_t r;
		1004
		1005	#if ECB_STDFP
		1006	memcpy (&r, &x, 4);
		1007	#else
		1008	/* slow emulation, works for anything but -0 */
		1009	uint32_t m;
		1010	int e;
		1011
		1012	if (x == 0e0f ) return 0x00000000U;
		1013	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		1014	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		1015	if (x != x ) return 0x7fbfffffU;
		1016
		1017	m = ecb_frexpf (x, &e) * 0x1000000U;
		1018
		1019	r = m & 0x80000000U;
		1020
		1021	if (r)
		1022	m = -m;
		1023
		1024	if (e <= -126)
		1025	{
		1026	m &= 0xffffffU;
		1027	m >>= (-125 - e);
		1028	e = -126;
		1029	}
		1030
		1031	r \|= (e + 126) << 23;
		1032	r \|= m & 0x7fffffU;
		1033	#endif
		1034
		1035	return r;
		1036	}
		1037
		1038	/* converts an ieee single/binary32 to a float */
		1039	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		1040	ecb_function_ ecb_const float
		1041	ecb_binary32_to_float (uint32_t x)
		1042	{
		1043	float r;
		1044
		1045	#if ECB_STDFP
		1046	memcpy (&r, &x, 4);
		1047	#else
		1048	/* emulation, only works for normals and subnormals and +0 */
		1049	int neg = x >> 31;
		1050	int e = (x >> 23) & 0xffU;
		1051
		1052	x &= 0x7fffffU;
		1053
		1054	if (e)
		1055	x \|= 0x800000U;
		1056	else
		1057	e = 1;
		1058
		1059	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		1060	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		1061
		1062	r = neg ? -r : r;
		1063	#endif
		1064
		1065	return r;
		1066	}
		1067
		1068	/* convert a double to ieee double/binary64 */
		1069	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		1070	ecb_function_ ecb_const uint64_t
		1071	ecb_double_to_binary64 (double x)
		1072	{
		1073	uint64_t r;
		1074
		1075	#if ECB_STDFP
		1076	memcpy (&r, &x, 8);
		1077	#else
		1078	/* slow emulation, works for anything but -0 */
		1079	uint64_t m;
		1080	int e;
		1081
		1082	if (x == 0e0 ) return 0x0000000000000000U;
		1083	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		1084	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		1085	if (x != x ) return 0X7ff7ffffffffffffU;
		1086
		1087	m = frexp (x, &e) * 0x20000000000000U;
		1088
		1089	r = m & 0x8000000000000000;;
		1090
		1091	if (r)
		1092	m = -m;
		1093
		1094	if (e <= -1022)
		1095	{
		1096	m &= 0x1fffffffffffffU;
		1097	m >>= (-1021 - e);
		1098	e = -1022;
		1099	}
		1100
		1101	r \|= ((uint64_t)(e + 1022)) << 52;
		1102	r \|= m & 0xfffffffffffffU;
		1103	#endif
		1104
		1105	return r;
		1106	}
		1107
		1108	/* converts an ieee double/binary64 to a double */
		1109	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		1110	ecb_function_ ecb_const double
		1111	ecb_binary64_to_double (uint64_t x)
		1112	{
		1113	double r;
		1114
		1115	#if ECB_STDFP
		1116	memcpy (&r, &x, 8);
		1117	#else
		1118	/* emulation, only works for normals and subnormals and +0 */
		1119	int neg = x >> 63;
		1120	int e = (x >> 52) & 0x7ffU;
		1121
		1122	x &= 0xfffffffffffffU;
		1123
		1124	if (e)
		1125	x \|= 0x10000000000000U;
		1126	else
		1127	e = 1;
		1128
		1129	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		1130	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		1131
		1132	r = neg ? -r : r;
		1133	#endif
		1134
		1135	return r;
		1136	}
		1137
		1138	/* convert a float to ieee half/binary16 */
		1139	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1140	ecb_function_ ecb_const uint16_t
		1141	ecb_float_to_binary16 (float x)
		1142	{
		1143	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1144	}
		1145
		1146	/* convert an ieee half/binary16 to float */
		1147	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1148	ecb_function_ ecb_const float
		1149	ecb_binary16_to_float (uint16_t x)
		1150	{
		1151	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1152	}
		1153
		1154	#endif
		1155
		1156	#endif
		1157

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Comparing libecb/ecb.h (file contents): Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs. Revision 1.189 by root, Mon Jun 21 21:26:48 2021 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs.
Revision 1.189 by root, Mon Jun 21 21:26:48 2021 UTC