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Comparing libecb/ecb.h (file contents):
Revision 1.23 by root, Thu May 26 19:40:09 2011 UTC vs.
Revision 1.210 by root, Fri Mar 25 15:28:08 2022 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	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
		44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x0001000c
		46
		47	#include <string.h> /* for memcpy */
		48
		49	#if defined (_WIN32) && !defined (__MINGW32__)
		50	typedef signed char int8_t;
		51	typedef unsigned char uint8_t;
		52	typedef signed char int_fast8_t;
		53	typedef unsigned char uint_fast8_t;
		54	typedef signed short int16_t;
		55	typedef unsigned short uint16_t;
		56	typedef signed int int_fast16_t;
		57	typedef unsigned int uint_fast16_t;
		58	typedef signed int int32_t;
		59	typedef unsigned int uint32_t;
		60	typedef signed int int_fast32_t;
		61	typedef unsigned int uint_fast32_t;
		62	#if __GNUC__
		63	typedef signed long long int64_t;
		64	typedef unsigned long long uint64_t;
		65	#else /* _MSC_VER || __BORLANDC__ */
		66	typedef signed __int64 int64_t;
		67	typedef unsigned __int64 uint64_t;
		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
		80	#else
33	#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
		113	#endif
34		114
35	/* many compilers define _GNUC_ to some versions but then only implement	115	/* many compilers define _GNUC_ to some versions but then only implement
36	* what their idiot authors think are the "more important" extensions,	116	* what their idiot authors think are the "more important" extensions,
37	* causing enourmous grief in return for some better fake benchmark numbers.	117	* causing enormous grief in return for some better fake benchmark numbers.
38	* or so.	118	* or so.
39	* 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
40	* 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.
41	*/	121	*/
42	#ifndef ECB_GCC_VERSION	122	#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
43	# if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__)
44	# define ECB_GCC_VERSION(major,minor) 0	123	#define ECB_GCC_VERSION(major,minor) 0
45	# else	124	#else
46	# 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)))
47	# endif	126	#endif
48	#endif
49		127
50	#ifndef __cplusplus	128	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
51	# if __STDC_VERSION__ >= 199901L	129
52	# define ECB_INLINE inline	130	#if __clang__ && defined __has_builtin
53	typedef _Bool ecb_bool;	131	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
54	# else	132	#else
55	# define ECB_INLINE inline /* yeah! */	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
		167	#endif
		168
		169	/*****************************************************************************/
		170
		171	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
		172	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
		173
		174	#if ECB_NO_THREADS
		175	#define ECB_NO_SMP 1
		176	#endif
		177
		178	#if ECB_NO_SMP
		179	#define ECB_MEMORY_FENCE do { } while (0)
		180	#endif
		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
		191	#ifndef ECB_MEMORY_FENCE
		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")
		194	#if __i386 || __i386__
		195	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		196	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		197	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
		198	#elif ECB_GCC_AMD64
		199	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		200	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
		201	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
		202	#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
		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 */
		211	#elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
		212	|| defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
		213	|| defined __ARM_ARCH_6T2__
		214	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
		215	#elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
		216	|| defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
		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")
		243	#endif
		244	#endif
		245	#endif
		246
		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	#undef ECB_MEMORY_FENCE_RELAXED
		254	#define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
		255
		256	#elif ECB_CLANG_EXTENSION(c_atomic)
		257	/* see comment below (stdatomic.h) about the C11 memory model. */
		258	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		259	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		260	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		261	#undef ECB_MEMORY_FENCE_RELAXED
		262	#define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
		263
		264	#elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
		265	#define ECB_MEMORY_FENCE __sync_synchronize ()
		266	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		267	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		268	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		269	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		270	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		271	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
		272	#elif _MSC_VER >= 1400 /* VC++ 2005 */
		273	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		274	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
		275	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
		276	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
		277	#elif defined _WIN32
		278	#include <WinNT.h>
		279	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		280	#elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
		281	#include <mbarrier.h>
		282	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		283	#define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
		284	#define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
		285	#define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
		286	#elif __xlC__
		287	#define ECB_MEMORY_FENCE __sync ()
		288	#endif
		289	#endif
		290
		291	#ifndef ECB_MEMORY_FENCE
		292	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		293	/* we assume that these memory fences work on all variables/all memory accesses, */
		294	/* not just C11 atomics and atomic accesses */
		295	#include <stdatomic.h>
		296	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		297	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		298	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
		299	#endif
		300	#endif
		301
		302	#ifndef ECB_MEMORY_FENCE
		303	#if !ECB_AVOID_PTHREADS
		304	/*
		305	* if you get undefined symbol references to pthread_mutex_lock,
		306	* or failure to find pthread.h, then you should implement
		307	* the ECB_MEMORY_FENCE operations for your cpu/compiler
		308	* OR provide pthread.h and link against the posix thread library
		309	* of your system.
		310	*/
		311	#include <pthread.h>
		312	#define ECB_NEEDS_PTHREADS 1
		313	#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
		314
		315	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		316	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		317	#endif
		318	#endif
		319
		320	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
		321	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		322	#endif
		323
		324	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
		325	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		326	#endif
		327
		328	#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
		329	#define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
		330	#endif
		331
		332	/*****************************************************************************/
		333
		334	#if ECB_CPP
		335	#define ecb_inline static inline
		336	#elif ECB_GCC_VERSION(2,5)
		337	#define ecb_inline static __inline__
		338	#elif ECB_C99
		339	#define ecb_inline static inline
		340	#else
		341	#define ecb_inline static
		342	#endif
		343
		344	#if ECB_GCC_VERSION(3,3)
		345	#define ecb_restrict __restrict__
		346	#elif ECB_C99
		347	#define ecb_restrict restrict
		348	#else
		349	#define ecb_restrict
		350	#endif
		351
56	typedef int ecb_bool;	352	typedef int ecb_bool;
57	# endif
58	#endif
59		353
60	#define ECB_CONCAT_(a, b) a ## b	354	#define ECB_CONCAT_(a, b) a ## b
61	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	355	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
62	#define ECB_STRINGIFY_(a) # a	356	#define ECB_STRINGIFY_(a) # a
63	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	357	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		358	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
64		359
65	#define ECB_HEADER_INLINE static ECB_INLINE	360	/* This marks larger functions that do not neccessarily need to be inlined */
		361	/* TODO: popssibly static would be best for these at the moment? */
		362	#define ecb_function_ ecb_inline
66		363
67	#if ECB_GCC_VERSION(3,1)	364	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
68	# define ecb_attribute(attrlist) __attribute__(attrlist)	365	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		366	#else
		367	#define ecb_attribute(attrlist)
		368	#endif
		369
		370	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
69	# define ecb_is_constant(expr) __builtin_constant_p (expr)	371	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		372	#else
		373	/* possible C11 impl for integral types
		374	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		375	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
		376
		377	#define ecb_is_constant(expr) 0
		378	#endif
		379
		380	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
70	# define ecb_expect(expr,value) __builtin_expect ((expr),(value))	381	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		382	#else
		383	#define ecb_expect(expr,value) (expr)
		384	#endif
		385
		386	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
71	# define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	387	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
72	#else	388	#else
73	# define ecb_attribute(attrlist)
74	# define ecb_is_constant(expr) 0
75	# define ecb_expect(expr,value) (expr)
76	# define ecb_prefetch(addr,rw,locality)	389	#define ecb_prefetch(addr,rw,locality)
77	#endif	390	#endif
78		391
79	/* no emulation for ecb_decltype */	392	/* no emulation for ecb_decltype */
		393	#if ECB_CPP11
		394	// older implementations might have problems with decltype(x)::type, work around it
		395	template<class T> struct ecb_decltype_t { typedef T type; };
		396	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
		397	#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
		398	#define ecb_decltype(x) __typeof__ (x)
		399	#endif
		400
		401	#if _MSC_VER >= 1300
		402	#define ecb_deprecated __declspec (deprecated)
		403	#else
		404	#define ecb_deprecated ecb_attribute ((__deprecated__))
		405	#endif
		406
		407	#if _MSC_VER >= 1500
		408	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
80	#if ECB_GCC_VERSION(4,5)	409	#elif ECB_GCC_VERSION(4,5)
81	# define ecb_decltype(x) __decltype(x)	410	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
82	#elif ECB_GCC_VERSION(3,0)	411	#else
83	# define ecb_decltype(x) typeof(x)	412	#define ecb_deprecated_message(msg) ecb_deprecated
84	#endif	413	#endif
85		414
		415	#if _MSC_VER >= 1400
		416	#define ecb_noinline __declspec (noinline)
		417	#else
86	#define ecb_noinline ecb_attribute ((noinline))	418	#define ecb_noinline ecb_attribute ((__noinline__))
87	#define ecb_noreturn ecb_attribute ((noreturn))	419	#endif
		420
88	#define ecb_unused ecb_attribute ((unused))	421	#define ecb_unused ecb_attribute ((__unused__))
89	#define ecb_const ecb_attribute ((const))	422	#define ecb_const ecb_attribute ((__const__))
90	#define ecb_pure ecb_attribute ((pure))	423	#define ecb_pure ecb_attribute ((__pure__))
		424
		425	#if ECB_C11 || __IBMC_NORETURN
		426	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		427	#define ecb_noreturn _Noreturn
		428	#elif ECB_CPP11
		429	#define ecb_noreturn [[noreturn]]
		430	#elif _MSC_VER >= 1200
		431	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		432	#define ecb_noreturn __declspec (noreturn)
		433	#else
		434	#define ecb_noreturn ecb_attribute ((__noreturn__))
		435	#endif
		436
		437	#if ECB_GCC_VERSION(4,3)
		438	#define ecb_artificial ecb_attribute ((__artificial__))
91	#define ecb_hot ecb_attribute ((hot)) /* 4.3 */	439	#define ecb_hot ecb_attribute ((__hot__))
92	#define ecb_cold ecb_attribute ((cold)) /* 4.3 */	440	#define ecb_cold ecb_attribute ((__cold__))
		441	#else
		442	#define ecb_artificial
		443	#define ecb_hot
		444	#define ecb_cold
		445	#endif
93		446
94	/* put into if's if you are very sure that the expression */	447	/* put around conditional expressions if you are very sure that the */
95	/* is mostly true or mosty false. note that these return */	448	/* expression is mostly true or mostly false. note that these return */
96	/* booleans, not the expression. */	449	/* booleans, not the expression. */
97	#define ecb_unlikely(expr) ecb_expect (!!(expr), 0)	450	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
		451	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		452	/* for compatibility to the rest of the world */
98	#define ecb_likely(expr) ecb_expect (!!(expr), 1)	453	#define ecb_likely(expr) ecb_expect_true (expr)
		454	#define ecb_unlikely(expr) ecb_expect_false (expr)
		455
		456	/* count trailing zero bits and count # of one bits */
		457	#if ECB_GCC_VERSION(3,4) \
		458	|| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		459	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		460	&& ECB_CLANG_BUILTIN(__builtin_popcount))
		461	#define ecb_ctz32(x) __builtin_ctz (x)
		462	#define ecb_ctz64(x) (__SIZEOF_LONG__ == 64 ? __builtin_ctzl (x) : __builtin_ctzll (x))
		463	#define ecb_clz32(x) __builtin_clz (x)
		464	#define ecb_clz64(x) (__SIZEOF_LONG__ == 64 ? __builtin_clzl (x) : __builtin_clzll (x))
		465	#define ecb_ld32(x) (ecb_clz32 (x) ^ 31)
		466	#define ecb_ld64(x) (ecb_clz64 (x) ^ 63)
		467	#define ecb_popcount32(x) __builtin_popcount (x)
		468	/* ecb_popcount64 is more difficult, see below */
		469	#else
		470	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
		471	ecb_function_ ecb_const int
		472	ecb_ctz32 (uint32_t x)
		473	{
		474	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		475	unsigned long r;
		476	_BitScanForward (&r, x);
		477	return (int)r;
		478	#else
		479	int r;
		480
		481	x &= ~x + 1; /* this isolates the lowest bit */
		482
		483	#if 1
		484	/* David Seal's algorithm, Message-ID: <32975@armltd.uucp> from 1994 */
		485	/* This happens to return 32 for x == 0, but the API does not support this */
		486
		487	/* -0 marks unused entries */
		488	static unsigned char table[64] =
		489	{
		490	32, 0, 1, 12, 2, 6, -0, 13, 3, -0, 7, -0, -0, -0, -0, 14,
		491	10, 4, -0, -0, 8, -0, -0, 25, -0, -0, -0, -0, -0, 21, 27, 15,
		492	31, 11, 5, -0, -0, -0, -0, -0, 9, -0, -0, 24, -0, -0, 20, 26,
		493	30, -0, -0, -0, -0, 23, -0, 19, 29, -0, 22, 18, 28, 17, 16, -0
		494	};
		495
		496	/* magic constant results in 33 unique values in the upper 6 bits */
		497	x *= 0x0450fbafU; /* == 17 * 65 * 65535 */
		498
		499	r = table [x >> 26];
		500	#elif 0 /* branchless on i386, typically */
		501	r = 0;
		502	r += !!(x & 0xaaaaaaaa) << 0;
		503	r += !!(x & 0xcccccccc) << 1;
		504	r += !!(x & 0xf0f0f0f0) << 2;
		505	r += !!(x & 0xff00ff00) << 3;
		506	r += !!(x & 0xffff0000) << 4;
		507	#else /* branchless on modern compilers, typically */
		508	r = 0;
		509	if (x & 0xaaaaaaaa) r += 1;
		510	if (x & 0xcccccccc) r += 2;
		511	if (x & 0xf0f0f0f0) r += 4;
		512	if (x & 0xff00ff00) r += 8;
		513	if (x & 0xffff0000) r += 16;
		514	#endif
		515
		516	return r;
		517	#endif
		518	}
		519
		520	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
		521	ecb_function_ ecb_const int
		522	ecb_ctz64 (uint64_t x)
		523	{
		524	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		525	unsigned long r;
		526	_BitScanForward64 (&r, x);
		527	return (int)r;
		528	#else
		529	int shift = x & 0xffffffff ? 0 : 32;
		530	return ecb_ctz32 (x >> shift) + shift;
		531	#endif
		532	}
		533
		534	ecb_function_ ecb_const int ecb_clz32 (uint32_t x);
		535	ecb_function_ ecb_const int
		536	ecb_clz32 (uint32_t x)
		537	{
		538	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		539	unsigned long r;
		540	_BitScanReverse (&r, x);
		541	return (int)r;
		542	#else
		543
		544	/* Robert Harley's algorithm from comp.arch 1996-12-07 */
		545	/* This happens to return 32 for x == 0, but the API does not support this */
		546
		547	/* -0 marks unused table elements */
		548	static unsigned char table[64] =
		549	{
		550	32, 31, -0, 16, -0, 30, 3, -0, 15, -0, -0, -0, 29, 10, 2, -0,
		551	-0, -0, 12, 14, 21, -0, 19, -0, -0, 28, -0, 25, -0, 9, 1, -0,
		552	17, -0, 4, -0, -0, -0, 11, -0, 13, 22, 20, -0, 26, -0, -0, 18,
		553	5, -0, -0, 23, -0, 27, -0, 6, -0, 24, 7, -0, 8, -0, 0, -0
		554	};
		555
		556	/* propagate leftmost 1 bit to the right */
		557	x |= x >> 1;
		558	x |= x >> 2;
		559	x |= x >> 4;
		560	x |= x >> 8;
		561	x |= x >> 16;
		562
		563	/* magic constant results in 33 unique values in the upper 6 bits */
		564	x *= 0x06EB14F9U; /* == 7 * 255 * 255 * 255 */
		565
		566	return table [x >> 26];
		567	#endif
		568	}
		569
		570	ecb_function_ ecb_const int ecb_clz64 (uint64_t x);
		571	ecb_function_ ecb_const int
		572	ecb_clz64 (uint64_t x)
		573	{
		574	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		575	unsigned long r;
		576	_BitScanReverse64 (&r, x);
		577	return (int)r;
		578	#else
		579	uint32_t l = x >> 32;
		580	int shift = l ? 0 : 32;
		581	return ecb_clz32 (l ? l : x) + shift;
		582	#endif
		583	}
		584
		585	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
		586	ecb_function_ ecb_const int
		587	ecb_popcount32 (uint32_t x)
		588	{
		589	x -= (x >> 1) & 0x55555555;
		590	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
		591	x = ((x >> 4) + x) & 0x0f0f0f0f;
		592	x *= 0x01010101;
		593
		594	return x >> 24;
		595	}
		596
		597	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
		598	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
		599	{
		600	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		601	unsigned long r;
		602	_BitScanReverse (&r, x);
		603	return (int)r;
		604	#else
		605	int r = 0;
		606
		607	if (x >> 16) { x >>= 16; r += 16; }
		608	if (x >> 8) { x >>= 8; r += 8; }
		609	if (x >> 4) { x >>= 4; r += 4; }
		610	if (x >> 2) { x >>= 2; r += 2; }
		611	if (x >> 1) { r += 1; }
		612
		613	return r;
		614	#endif
		615	}
		616
		617	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
		618	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
		619	{
		620	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		621	unsigned long r;
		622	_BitScanReverse64 (&r, x);
		623	return (int)r;
		624	#else
		625	int r = 0;
		626
		627	if (x >> 32) { x >>= 32; r += 32; }
		628
		629	return r + ecb_ld32 (x);
		630	#endif
		631	}
		632	#endif
		633
		634	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		635	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		636	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		637	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		638
		639	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
		640	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
		641	{
		642	return ( (x * 0x0802U & 0x22110U)
		643	| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		644	}
		645
		646	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
		647	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
		648	{
		649	x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
		650	x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
		651	x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
		652	x = ( x >> 8 ) | ( x << 8);
		653
		654	return x;
		655	}
		656
		657	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
		658	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
		659	{
		660	x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
		661	x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
		662	x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
		663	x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
		664	x = ( x >> 16 ) | ( x << 16);
		665
		666	return x;
		667	}
		668
		669	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
		670	ecb_function_ ecb_const int
		671	ecb_popcount64 (uint64_t x)
		672	{
		673	/* popcount64 is only available on 64 bit cpus as gcc builtin. */
		674	/* also, gcc/clang make this surprisingly difficult to use */
		675	#if (__SIZEOF_LONG__ == 8) && (ECB_GCC_VERSION(3,4) || ECB_CLANG_BUILTIN (__builtin_popcountl))
		676	return __builtin_popcountl (x);
		677	#else
		678	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		679	#endif
		680	}
		681
		682	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
		683	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
		684	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
		685	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
		686	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
		687	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
		688	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
		689	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
		690
		691	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> (-count & 7)) | (x << (count & 7)); }
		692	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << (-count & 7)) | (x >> (count & 7)); }
		693	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (-count & 15)) | (x << (count & 15)); }
		694	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (-count & 15)) | (x >> (count & 15)); }
		695	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (-count & 31)) | (x << (count & 31)); }
		696	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (-count & 31)) | (x >> (count & 31)); }
		697	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (-count & 63)) | (x << (count & 63)); }
		698	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (-count & 63)) | (x >> (count & 63)); }
		699
		700	#if ECB_CPP
		701
		702	inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
		703	inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
		704	inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
		705	inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
		706
		707	inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
		708	inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
		709	inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
		710	inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
		711
		712	inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
		713	inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
		714	inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
		715	inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
		716
		717	inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
		718	inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
		719	inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
		720	inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
		721
		722	inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
		723	inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
		724	inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
		725
		726	inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
		727	inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
		728	inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
		729	inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
		730
		731	inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
		732	inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
		733	inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
		734	inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
		735
		736	#endif
		737
		738	#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		739	#if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
		740	#define ecb_bswap16(x) __builtin_bswap16 (x)
		741	#else
		742	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		743	#endif
		744	#define ecb_bswap32(x) __builtin_bswap32 (x)
		745	#define ecb_bswap64(x) __builtin_bswap64 (x)
		746	#elif _MSC_VER
		747	#include <stdlib.h>
		748	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		749	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		750	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
		751	#else
		752	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
		753	ecb_function_ ecb_const uint16_t
		754	ecb_bswap16 (uint16_t x)
		755	{
		756	return ecb_rotl16 (x, 8);
		757	}
		758
		759	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
		760	ecb_function_ ecb_const uint32_t
		761	ecb_bswap32 (uint32_t x)
		762	{
		763	return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
		764	}
		765
		766	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
		767	ecb_function_ ecb_const uint64_t
		768	ecb_bswap64 (uint64_t x)
		769	{
		770	return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
		771	}
		772	#endif
		773
		774	#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
		775	#define ecb_unreachable() __builtin_unreachable ()
		776	#else
		777	/* this seems to work fine, but gcc always emits a warning for it :/ */
		778	ecb_inline ecb_noreturn void ecb_unreachable (void);
		779	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
		780	#endif
99		781
100	/* try to tell the compiler that some condition is definitely true */	782	/* try to tell the compiler that some condition is definitely true */
101	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	783	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
102		784
103	/* count trailing zero bits and count # of one bits */	785	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
104	#if ECB_GCC_VERSION(3,4)	786	ecb_inline ecb_const uint32_t
105	#define ecb_ctz32 (x) __builtin_ctz (x)
106	#define ecb_popcount32 (x) __builtin_popcount (x)
107	#else
108	ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const;
109	ECB_HEADER_INLINE
110	ecb_ctz32 (uint32_t x)
111	{
112	int r = 0;
113
114	x &= -x; /* this isolates the lowest bit */
115
116	if (x & 0xaaaaaaaa) r += 1;
117	if (x & 0xcccccccc) r += 2;
118	if (x & 0xf0f0f0f0) r += 4;
119	if (x & 0xff00ff00) r += 8;
120	if (x & 0xffff0000) r += 16;
121
122	return r;
123	}
124
125	ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const;
126	ECB_HEADER_INLINE
127	ecb_popcount32 (uint32_t x)
128	{
129	x -= (x >> 1) & 0x55555555;
130	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
131	x = ((x >> 4) + x) & 0x0f0f0f0f;
132	x *= 0x01010101;
133
134	return x >> 24;
135	}
136	#endif
137
138	#if ECB_GCC_VERSION(4,3)
139	# define ecb_bswap32(x) __builtin_bswap32 (x)
140	# define ecb_bswap16(x) (__builtin_bswap32(x) >> 16)
141	#else
142	ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const;
143	ECB_HEADER_INLINE uint32_t
144	ecb_bswap32 (uint32_t x)
145	{
146	return (x >> 24)
147	| ((x >> 8) & 0x0000ff00)
148	| ((x << 8) & 0x00ff0000)
149	| (x << 24);
150	}
151
152	ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const;
153	ECB_HEADER_INLINE uint32_t
154	ecb_bswap16 (uint32_t x)
155	{
156	return ((x >> 8) & 0xff)
157	| ((x << 8) & 0x00ff0000)
158	| (x << 24);
159	}
160	#endif
161
162	#if ECB_GCC_VERSION(4,5)
163	# define ecb_unreachable() __builtin_unreachable ()
164	#else
165	/* this seems to work fine, but gcc always emits a warning for it :/ */
166	ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn;
167	ECB_HEADER_INLINE void ecb_unreachable (void) { }
168	#endif
169
170	ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const;
171	ECB_HEADER_INLINE unsigned char
172	ecb_byteorder_helper (void)	787	ecb_byteorder_helper (void)
173	{	788	{
174	const uint32_t u = 0x11223344;	789	/* the union code still generates code under pressure in gcc, */
175	return *(unsigned char *)&u;	790	/* but less than using pointers, and always seems to */
		791	/* successfully return a constant. */
		792	/* the reason why we have this horrible preprocessor mess */
		793	/* is to avoid it in all cases, at least on common architectures */
		794	/* or when using a recent enough gcc version (>= 4.6) */
		795	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		796	|| ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
		797	#define ECB_LITTLE_ENDIAN 1
		798	return 0x44332211;
		799	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		800	|| ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
		801	#define ECB_BIG_ENDIAN 1
		802	return 0x11223344;
		803	#else
		804	union
		805	{
		806	uint8_t c[4];
		807	uint32_t u;
		808	} u = { 0x11, 0x22, 0x33, 0x44 };
		809	return u.u;
		810	#endif
176	}	811	}
177		812
178	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const;	813	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
179	ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; };	814	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
180	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const;	815	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
181	ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; };	816	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
182		817
		818	/*****************************************************************************/
		819	/* unaligned load/store */
		820
		821	ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		822	ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		823	ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		824
		825	ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		826	ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		827	ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		828
		829	ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		830	ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		831	ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		832
		833	ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
		834	ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
		835	ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
		836
		837	ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
		838	ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
		839	ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
		840
		841	ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		842	ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		843	ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		844
		845	ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		846	ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		847	ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		848
		849	ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
		850	ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
		851	ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
		852
		853	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)); }
		854	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)); }
		855	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)); }
		856
		857	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)); }
		858	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)); }
		859	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)); }
		860
		861	#if ECB_CPP
		862
		863	inline uint8_t ecb_bswap (uint8_t v) { return v; }
		864	inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
		865	inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
		866	inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
		867
		868	template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		869	template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		870	template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
		871	template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
		872	template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
		873	template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
		874	template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
		875	template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
		876
		877	template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		878	template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		879	template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
		880	template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
		881	template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
		882	template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
		883	template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
		884	template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
		885
		886	#endif
		887
		888	/*****************************************************************************/
		889	/* pointer/integer hashing */
		890
		891	/* based on hash by Chris Wellons, https://nullprogram.com/blog/2018/07/31/ */
		892	ecb_function_ uint32_t ecb_mix32 (uint32_t v);
		893	ecb_function_ uint32_t ecb_mix32 (uint32_t v)
		894	{
		895	v ^= v >> 16; v *= 0x7feb352dU;
		896	v ^= v >> 15; v *= 0x846ca68bU;
		897	v ^= v >> 16;
		898	return v;
		899	}
		900
		901	ecb_function_ uint32_t ecb_unmix32 (uint32_t v);
		902	ecb_function_ uint32_t ecb_unmix32 (uint32_t v)
		903	{
		904	v ^= v >> 16 ; v *= 0x43021123U;
		905	v ^= v >> 15 ^ v >> 30; v *= 0x1d69e2a5U;
		906	v ^= v >> 16 ;
		907	return v;
		908	}
		909
		910	/* based on splitmix64, by Sebastiona Vigna, https://prng.di.unimi.it/splitmix64.c */
		911	ecb_function_ uint64_t ecb_mix64 (uint64_t v);
		912	ecb_function_ uint64_t ecb_mix64 (uint64_t v)
		913	{
		914	v ^= v >> 30; v *= 0xbf58476d1ce4e5b9U;
		915	v ^= v >> 27; v *= 0x94d049bb133111ebU;
		916	v ^= v >> 31;
		917	return v;
		918	}
		919
		920	ecb_function_ uint64_t ecb_unmix64 (uint64_t v);
		921	ecb_function_ uint64_t ecb_unmix64 (uint64_t v)
		922	{
		923	v ^= v >> 31 ^ v >> 62; v *= 0x319642b2d24d8ec3U;
		924	v ^= v >> 27 ^ v >> 54; v *= 0x96de1b173f119089U;
		925	v ^= v >> 30 ^ v >> 60;
		926	return v;
		927	}
		928
		929	ecb_function_ uintptr_t ecb_ptrmix (void *p);
		930	ecb_function_ uintptr_t ecb_ptrmix (void *p)
		931	{
		932	#if ECB_PTRSIZE <= 4
		933	return ecb_mix32 ((uint32_t)p);
		934	#else
		935	return ecb_mix64 ((uint64_t)p);
		936	#endif
		937	}
		938
		939	ecb_function_ void *ecb_ptrunmix (uintptr_t v);
		940	ecb_function_ void *ecb_ptrunmix (uintptr_t v)
		941	{
		942	#if ECB_PTRSIZE <= 4
		943	return (void *)ecb_unmix32 (v);
		944	#else
		945	return (void *)ecb_unmix64 (v);
		946	#endif
		947	}
		948
		949	#if ECB_CPP
		950
		951	template<typename T>
		952	inline uintptr_t ecb_ptrmix (T *p)
		953	{
		954	return ecb_ptrmix (static_cast<void *>(p));
		955	}
		956
		957	template<typename T>
		958	inline T *ecb_ptrunmix (uintptr_t v)
		959	{
		960	return static_cast<T *>(ecb_ptrunmix (v));
		961	}
		962
		963	#endif
		964
		965	/*****************************************************************************/
		966	/* gray code */
		967
		968	ecb_inline uint_fast8_t ecb_gray_encode8 (uint_fast8_t b) { return b ^ (b >> 1); }
		969	ecb_inline uint_fast16_t ecb_gray_encode16 (uint_fast16_t b) { return b ^ (b >> 1); }
		970	ecb_inline uint_fast32_t ecb_gray_encode32 (uint_fast32_t b) { return b ^ (b >> 1); }
		971	ecb_inline uint_fast64_t ecb_gray_encode64 (uint_fast64_t b) { return b ^ (b >> 1); }
		972
		973	ecb_function_ uint8_t ecb_gray_decode8 (uint8_t g);
		974	ecb_function_ uint8_t ecb_gray_decode8 (uint8_t g)
		975	{
		976	g ^= g >> 1;
		977	g ^= g >> 2;
		978	g ^= g >> 4;
		979
		980	return g;
		981	}
		982
		983	ecb_function_ uint16_t ecb_gray_decode16 (uint16_t g);
		984	ecb_function_ uint16_t ecb_gray_decode16 (uint16_t g)
		985	{
		986	g ^= g >> 1;
		987	g ^= g >> 2;
		988	g ^= g >> 4;
		989	g ^= g >> 8;
		990
		991	return g;
		992	}
		993
		994	ecb_function_ uint32_t ecb_gray_decode32 (uint32_t g);
		995	ecb_function_ uint32_t ecb_gray_decode32 (uint32_t g)
		996	{
		997	g ^= g >> 1;
		998	g ^= g >> 2;
		999	g ^= g >> 4;
		1000	g ^= g >> 8;
		1001	g ^= g >> 16;
		1002
		1003	return g;
		1004	}
		1005
		1006	ecb_function_ uint64_t ecb_gray_decode64 (uint64_t g);
		1007	ecb_function_ uint64_t ecb_gray_decode64 (uint64_t g)
		1008	{
		1009	g ^= g >> 1;
		1010	g ^= g >> 2;
		1011	g ^= g >> 4;
		1012	g ^= g >> 8;
		1013	g ^= g >> 16;
		1014	g ^= g >> 32;
		1015
		1016	return g;
		1017	}
		1018
		1019	#if ECB_CPP
		1020
		1021	ecb_inline uint8_t ecb_gray_encode (uint8_t b) { return ecb_gray_encode8 (b); }
		1022	ecb_inline uint16_t ecb_gray_encode (uint16_t b) { return ecb_gray_encode16 (b); }
		1023	ecb_inline uint32_t ecb_gray_encode (uint32_t b) { return ecb_gray_encode32 (b); }
		1024	ecb_inline uint64_t ecb_gray_encode (uint64_t b) { return ecb_gray_encode64 (b); }
		1025
		1026	ecb_inline uint8_t ecb_gray_decode (uint8_t g) { return ecb_gray_decode8 (g); }
		1027	ecb_inline uint16_t ecb_gray_decode (uint16_t g) { return ecb_gray_decode16 (g); }
		1028	ecb_inline uint32_t ecb_gray_decode (uint32_t g) { return ecb_gray_decode32 (g); }
		1029	ecb_inline uint64_t ecb_gray_decode (uint64_t g) { return ecb_gray_decode64 (g); }
		1030
		1031	#endif
		1032
		1033	/*****************************************************************************/
		1034	/* 2d hilbert curves */
		1035
		1036	/* algorithm from the book Hacker's Delight, modified to not */
		1037	/* run into undefined behaviour for n==16 */
		1038	static uint32_t
		1039	ecb_hilbert2d_index_to_coord32 (int n, uint32_t s)
		1040	{
		1041	uint32_t comp, swap, cs, t, sr;
		1042
		1043	/* pad s on the left (unused) bits with 01 (no change groups) */
		1044	s |= 0x55555555U << n << n;
		1045	/* "s shift right" */
		1046	sr = (s >> 1) & 0x55555555U;
		1047	/* compute complement and swap info in two-bit groups */
		1048	cs = ((s & 0x55555555U) + sr) ^ 0x55555555U;
		1049
		1050	/* parallel prefix xor op to propagate both complement
		1051	* and swap info together from left to right (there is
		1052	* no step "cs ^= cs >> 1", so in effect it computes
		1053	* two independent parallel prefix operations on two
		1054	* interleaved sets of sixteen bits).
		1055	*/
		1056	cs ^= cs >> 2;
		1057	cs ^= cs >> 4;
		1058	cs ^= cs >> 8;
		1059	cs ^= cs >> 16;
		1060
		1061	/* separate swap and complement bits */
		1062	swap = cs & 0x55555555U;
		1063	comp = (cs >> 1) & 0x55555555U;
		1064
		1065	/* calculate coordinates in odd and even bit positions */
		1066	t = (s & swap) ^ comp;
		1067	s = s ^ sr ^ t ^ (t << 1);
		1068
		1069	/* unpad/clear out any junk on the left */
		1070	s = s & ((1 << n << n) - 1);
		1071
		1072	/* Now "unshuffle" to separate the x and y bits. */
		1073	t = (s ^ (s >> 1)) & 0x22222222U; s ^= t ^ (t << 1);
		1074	t = (s ^ (s >> 2)) & 0x0c0c0c0cU; s ^= t ^ (t << 2);
		1075	t = (s ^ (s >> 4)) & 0x00f000f0U; s ^= t ^ (t << 4);
		1076	t = (s ^ (s >> 8)) & 0x0000ff00U; s ^= t ^ (t << 8);
		1077
		1078	/* now s contains two 16-bit coordinates */
		1079	return s;
		1080	}
		1081
		1082	/* 64 bit, a straightforward extension to the 32 bit case */
		1083	static uint64_t
		1084	ecb_hilbert2d_index_to_coord64 (int n, uint64_t s)
		1085	{
		1086	uint64_t comp, swap, cs, t, sr;
		1087
		1088	/* pad s on the left (unused) bits with 01 (no change groups) */
		1089	s |= 0x5555555555555555U << n << n;
		1090	/* "s shift right" */
		1091	sr = (s >> 1) & 0x5555555555555555U;
		1092	/* compute complement and swap info in two-bit groups */
		1093	cs = ((s & 0x5555555555555555U) + sr) ^ 0x5555555555555555U;
		1094
		1095	/* parallel prefix xor op to propagate both complement
		1096	* and swap info together from left to right (there is
		1097	* no step "cs ^= cs >> 1", so in effect it computes
		1098	* two independent parallel prefix operations on two
		1099	* interleaved sets of thirty-two bits).
		1100	*/
		1101	cs ^= cs >> 2;
		1102	cs ^= cs >> 4;
		1103	cs ^= cs >> 8;
		1104	cs ^= cs >> 16;
		1105	cs ^= cs >> 32;
		1106
		1107	/* separate swap and complement bits */
		1108	swap = cs & 0x5555555555555555U;
		1109	comp = (cs >> 1) & 0x5555555555555555U;
		1110
		1111	/* calculate coordinates in odd and even bit positions */
		1112	t = (s & swap) ^ comp;
		1113	s = s ^ sr ^ t ^ (t << 1);
		1114
		1115	/* unpad/clear out any junk on the left */
		1116	s = s & ((1 << n << n) - 1);
		1117
		1118	/* Now "unshuffle" to separate the x and y bits. */
		1119	t = (s ^ (s >> 1)) & 0x2222222222222222U; s ^= t ^ (t << 1);
		1120	t = (s ^ (s >> 2)) & 0x0c0c0c0c0c0c0c0cU; s ^= t ^ (t << 2);
		1121	t = (s ^ (s >> 4)) & 0x00f000f000f000f0U; s ^= t ^ (t << 4);
		1122	t = (s ^ (s >> 8)) & 0x0000ff000000ff00U; s ^= t ^ (t << 8);
		1123	t = (s ^ (s >> 16)) & 0x00000000ffff0000U; s ^= t ^ (t << 16);
		1124
		1125	/* now s contains two 32-bit coordinates */
		1126	return s;
		1127	}
		1128
		1129	/* algorithm from the book Hacker's Delight, but a similar algorithm*/
		1130	/* is given in https://doi.org/10.1002/spe.4380160103 */
		1131	/* this has been slightly improved over the original version */
		1132	ecb_function_ uint32_t
		1133	ecb_hilbert2d_coord_to_index32 (int n, uint32_t xy)
		1134	{
		1135	uint32_t row;
		1136	uint32_t state = 0;
		1137	uint32_t s = 0;
		1138
		1139	do
		1140	{
		1141	--n;
		1142
		1143	row = 4 * state
		1144	| (2 & (xy >> n >> 15))
		1145	| (1 & (xy >> n ));
		1146
		1147	/* these funky constants are lookup tables for two-bit values */
		1148	s = (s << 2) | (0x361e9cb4U >> 2 * row) & 3;
		1149	state = (0x8fe65831U >> 2 * row) & 3;
		1150	}
		1151	while (n > 0);
		1152
		1153	return s;
		1154	}
		1155
		1156	/* 64 bit, essentially the same as 32 bit */
		1157	ecb_function_ uint64_t
		1158	ecb_hilbert2d_coord_to_index64 (int n, uint64_t xy)
		1159	{
		1160	uint32_t row;
		1161	uint32_t state = 0;
		1162	uint64_t s = 0;
		1163
		1164	do
		1165	{
		1166	--n;
		1167
		1168	row = 4 * state
		1169	| (2 & (xy >> n >> 31))
		1170	| (1 & (xy >> n ));
		1171
		1172	/* these funky constants are lookup tables for two-bit values */
		1173	s = (s << 2) | (0x361e9cb4U >> 2 * row) & 3;
		1174	state = (0x8fe65831U >> 2 * row) & 3;
		1175	}
		1176	while (n > 0);
		1177
		1178	return s;
		1179	}
		1180
		1181	/*****************************************************************************/
		1182	/* division */
		1183
		1184	#if ECB_GCC_VERSION(3,0) || ECB_C99
		1185	/* C99 tightened the definition of %, so we can use a more efficient version */
		1186	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
		1187	#else
183	#define ecb_mod(m, n) ((m) < 0 ? ((n) - (-(m) % (n))) : ((m) % (n)))	1188	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
		1189	#endif
		1190
		1191	#if ECB_CPP
		1192	template<typename T>
		1193	static inline T ecb_div_rd (T val, T div)
		1194	{
		1195	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		1196	}
		1197	template<typename T>
		1198	static inline T ecb_div_ru (T val, T div)
		1199	{
		1200	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		1201	}
		1202	#else
		1203	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
		1204	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		1205	#endif
		1206
		1207	/*****************************************************************************/
		1208	/* array length */
184		1209
185	#if ecb_cplusplus_does_not_suck	1210	#if ecb_cplusplus_does_not_suck
186	// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm)	1211	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
187	template<typename T, int N>	1212	template<typename T, int N>
188	static inline int ecb_array_length (const T (&arr)[N])	1213	static inline int ecb_array_length (const T (&arr)[N])
189	{	1214	{
190	return N;	1215	return N;
191	}	1216	}
192	#else	1217	#else
193	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	1218	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
		1219	#endif
		1220
		1221	/*****************************************************************************/
		1222	/* IEEE 754-2008 half float conversions */
		1223
		1224	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		1225	ecb_function_ ecb_const uint32_t
		1226	ecb_binary16_to_binary32 (uint32_t x)
		1227	{
		1228	unsigned int s = (x & 0x8000) << (31 - 15);
		1229	int e = (x >> 10) & 0x001f;
		1230	unsigned int m = x & 0x03ff;
		1231
		1232	if (ecb_expect_false (e == 31))
		1233	/* infinity or NaN */
		1234	e = 255 - (127 - 15);
		1235	else if (ecb_expect_false (!e))
		1236	{
		1237	if (ecb_expect_true (!m))
		1238	/* zero, handled by code below by forcing e to 0 */
		1239	e = 0 - (127 - 15);
		1240	else
		1241	{
		1242	/* subnormal, renormalise */
		1243	unsigned int s = 10 - ecb_ld32 (m);
		1244
		1245	m = (m << s) & 0x3ff; /* mask implicit bit */
		1246	e -= s - 1;
		1247	}
		1248	}
		1249
		1250	/* e and m now are normalised, or zero, (or inf or nan) */
		1251	e += 127 - 15;
		1252
		1253	return s | (e << 23) | (m << (23 - 10));
		1254	}
		1255
		1256	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		1257	ecb_function_ ecb_const uint16_t
		1258	ecb_binary32_to_binary16 (uint32_t x)
		1259	{
		1260	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		1261	int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		1262	unsigned int m = x & 0x007fffff;
		1263
		1264	x &= 0x7fffffff;
		1265
		1266	/* if it's within range of binary16 normals, use fast path */
		1267	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		1268	{
		1269	/* mantissa round-to-even */
		1270	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		1271
		1272	/* handle overflow */
		1273	if (ecb_expect_false (m >= 0x00800000))
		1274	{
		1275	m >>= 1;
		1276	e += 1;
		1277	}
		1278
		1279	return s | (e << 10) | (m >> (23 - 10));
		1280	}
		1281
		1282	/* handle large numbers and infinity */
		1283	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		1284	return s | 0x7c00;
		1285
		1286	/* handle zero, subnormals and small numbers */
		1287	if (ecb_expect_true (x < 0x38800000))
		1288	{
		1289	/* zero */
		1290	if (ecb_expect_true (!x))
		1291	return s;
		1292
		1293	/* handle subnormals */
		1294
		1295	/* too small, will be zero */
		1296	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		1297	return s;
		1298
		1299	m |= 0x00800000; /* make implicit bit explicit */
		1300
		1301	/* very tricky - we need to round to the nearest e (+10) bit value */
		1302	{
		1303	unsigned int bits = 14 - e;
		1304	unsigned int half = (1 << (bits - 1)) - 1;
		1305	unsigned int even = (m >> bits) & 1;
		1306
		1307	/* if this overflows, we will end up with a normalised number */
		1308	m = (m + half + even) >> bits;
		1309	}
		1310
		1311	return s | m;
		1312	}
		1313
		1314	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		1315	m >>= 13;
		1316
		1317	return s | 0x7c00 | m | !m;
		1318	}
		1319
		1320	/*******************************************************************************/
		1321	/* fast integer to ascii */
		1322
		1323	/*
		1324	* This code is pretty complicated because it is general. The idea behind it,
		1325	* however, is pretty simple: first, the number is multiplied with a scaling
		1326	* factor (2**bits / 10**(digits-1)) to convert the integer into a fixed-point
		1327	* number with the first digit in the upper bits.
		1328	* Then this digit is converted to text and masked out. The resulting number
		1329	* is then multiplied by 10, by multiplying the fixed point representation
		1330	* by 5 and shifting the (binary) decimal point one to the right, so a 4.28
		1331	* format becomes 5.27, 6.26 and so on.
		1332	* The rest involves only advancing the pointer if we already generated a
		1333	* non-zero digit, so leading zeroes are overwritten.
		1334	*/
		1335
		1336	/* simply return a mask with "bits" bits set */
		1337	#define ecb_i2a_mask(type,bits) ((((type)1) << (bits)) - 1)
		1338
		1339	/* oputput a single digit. maskvalue is 10**digitidx */
		1340	#define ecb_i2a_digit(type,bits,digitmask,maskvalue,digitidx) \
		1341	if (digitmask >= maskvalue) /* constant, used to decide how many digits to generate */ \
		1342	{ \
		1343	char digit = x >> (bits - digitidx); /* calculate the topmost digit */ \
		1344	*ptr = digit + '0'; /* output it */ \
		1345	nz = (digitmask == maskvalue) || nz || digit; /* first term == always output last digit */ \
		1346	ptr += nz; /* output digit only if non-zero digit seen */ \
		1347	x = (x & ecb_i2a_mask (type, bits - digitidx)) * 5; /* *10, but shift decimal point right */ \
		1348	}
		1349
		1350	/* convert integer to fixed point format and multiply out digits, highest first */
		1351	/* requires magic constants: max. digits and number of bits after the decimal point */
		1352	#define ecb_i2a_def(suffix,ptr,v,type,bits,digitmask,lz) \
		1353	ecb_inline char *ecb_i2a_ ## suffix (char *ptr, uint32_t u) \
		1354	{ \
		1355	char nz = lz; /* non-zero digit seen? */ \
		1356	/* convert to x.bits fixed-point */ \
		1357	type x = u * ((ecb_i2a_mask (type, bits) + digitmask) / digitmask); \
		1358	/* output up to 10 digits */ \
		1359	ecb_i2a_digit (type,bits,digitmask, 1, 0); \
		1360	ecb_i2a_digit (type,bits,digitmask, 10, 1); \
		1361	ecb_i2a_digit (type,bits,digitmask, 100, 2); \
		1362	ecb_i2a_digit (type,bits,digitmask, 1000, 3); \
		1363	ecb_i2a_digit (type,bits,digitmask, 10000, 4); \
		1364	ecb_i2a_digit (type,bits,digitmask, 100000, 5); \
		1365	ecb_i2a_digit (type,bits,digitmask, 1000000, 6); \
		1366	ecb_i2a_digit (type,bits,digitmask, 10000000, 7); \
		1367	ecb_i2a_digit (type,bits,digitmask, 100000000, 8); \
		1368	ecb_i2a_digit (type,bits,digitmask, 1000000000, 9); \
		1369	return ptr; \
		1370	}
		1371
		1372	/* predefined versions of the above, for various digits */
		1373	/* ecb_i2a_xN = almost N digits, limit defined by macro */
		1374	/* ecb_i2a_N = up to N digits, leading zeroes suppressed */
		1375	/* ecb_i2a_0N = exactly N digits, including leading zeroes */
		1376
		1377	/* non-leading-zero versions, limited range */
		1378	#define ECB_I2A_MAX_X5 59074 /* limit for ecb_i2a_x5 */
		1379	#define ECB_I2A_MAX_X10 2932500665 /* limit for ecb_i2a_x10 */
		1380	ecb_i2a_def ( x5, ptr, v, uint32_t, 26, 10000, 0)
		1381	ecb_i2a_def (x10, ptr, v, uint64_t, 60, 1000000000, 0)
		1382
		1383	/* non-leading zero versions, all digits, 4 and 9 are optimal for 32/64 bit */
		1384	ecb_i2a_def ( 2, ptr, v, uint32_t, 10, 10, 0)
		1385	ecb_i2a_def ( 3, ptr, v, uint32_t, 12, 100, 0)
		1386	ecb_i2a_def ( 4, ptr, v, uint32_t, 26, 1000, 0)
		1387	ecb_i2a_def ( 5, ptr, v, uint64_t, 30, 10000, 0)
		1388	ecb_i2a_def ( 6, ptr, v, uint64_t, 36, 100000, 0)
		1389	ecb_i2a_def ( 7, ptr, v, uint64_t, 44, 1000000, 0)
		1390	ecb_i2a_def ( 8, ptr, v, uint64_t, 50, 10000000, 0)
		1391	ecb_i2a_def ( 9, ptr, v, uint64_t, 56, 100000000, 0)
		1392
		1393	/* leading-zero versions, all digits, 04 and 09 are optimal for 32/64 bit */
		1394	ecb_i2a_def (02, ptr, v, uint32_t, 10, 10, 1)
		1395	ecb_i2a_def (03, ptr, v, uint32_t, 12, 100, 1)
		1396	ecb_i2a_def (04, ptr, v, uint32_t, 26, 1000, 1)
		1397	ecb_i2a_def (05, ptr, v, uint64_t, 30, 10000, 1)
		1398	ecb_i2a_def (06, ptr, v, uint64_t, 36, 100000, 1)
		1399	ecb_i2a_def (07, ptr, v, uint64_t, 44, 1000000, 1)
		1400	ecb_i2a_def (08, ptr, v, uint64_t, 50, 10000000, 1)
		1401	ecb_i2a_def (09, ptr, v, uint64_t, 56, 100000000, 1)
		1402
		1403	#define ECB_I2A_I32_DIGITS 11
		1404	#define ECB_I2A_U32_DIGITS 10
		1405	#define ECB_I2A_I64_DIGITS 20
		1406	#define ECB_I2A_U64_DIGITS 21
		1407	#define ECB_I2A_MAX_DIGITS 21
		1408
		1409	ecb_inline char *
		1410	ecb_i2a_u32 (char *ptr, uint32_t u)
		1411	{
		1412	#if ECB_64BIT_NATIVE
		1413	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1414	ptr = ecb_i2a_x10 (ptr, u);
		1415	else /* x10 almost, but not fully, covers 32 bit */
		1416	{
		1417	uint32_t u1 = u % 1000000000;
		1418	uint32_t u2 = u / 1000000000;
		1419
		1420	*ptr++ = u2 + '0';
		1421	ptr = ecb_i2a_09 (ptr, u1);
		1422	}
		1423	#else
		1424	if (ecb_expect_true (u <= ECB_I2A_MAX_X5))
		1425	ecb_i2a_x5 (ptr, u);
		1426	else if (ecb_expect_true (u <= ECB_I2A_MAX_X5 * 10000))
		1427	{
		1428	uint32_t u1 = u % 10000;
		1429	uint32_t u2 = u / 10000;
		1430
		1431	ptr = ecb_i2a_x5 (ptr, u2);
		1432	ptr = ecb_i2a_04 (ptr, u1);
		1433	}
		1434	else
		1435	{
		1436	uint32_t u1 = u % 10000;
		1437	uint32_t ua = u / 10000;
		1438	uint32_t u2 = ua % 10000;
		1439	uint32_t u3 = ua / 10000;
		1440
		1441	ptr = ecb_i2a_2 (ptr, u3);
		1442	ptr = ecb_i2a_04 (ptr, u2);
		1443	ptr = ecb_i2a_04 (ptr, u1);
		1444	}
194	#endif	1445	#endif
195		1446
196	ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	1447	return ptr;
197	ECB_INLINE uint32_t
198	ecb_rotr32 (uint32_t x, unsigned int count)
199	{
200	return (x << (32 - count)) | (x >> count);
201	}	1448	}
202		1449
203	ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	1450	ecb_inline char *
204	ECB_INLINE uint32_t	1451	ecb_i2a_i32 (char *ptr, int32_t v)
205	ecb_rotl32 (uint32_t x, unsigned int count)
206	{	1452	{
207	return (x >> (32 - count)) | (x << count);	1453	*ptr = '-'; ptr += v < 0;
208	}	1454	uint32_t u = v < 0 ? -(uint32_t)v : v;
209		1455
		1456	#if ECB_64BIT_NATIVE
		1457	ptr = ecb_i2a_x10 (ptr, u); /* x10 fully covers 31 bit */
		1458	#else
		1459	ptr = ecb_i2a_u32 (ptr, u);
210	#endif	1460	#endif
211		1461
		1462	return ptr;
		1463	}
		1464
		1465	ecb_inline char *
		1466	ecb_i2a_u64 (char *ptr, uint64_t u)
		1467	{
		1468	#if ECB_64BIT_NATIVE
		1469	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1470	ptr = ecb_i2a_x10 (ptr, u);
		1471	else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000))
		1472	{
		1473	uint64_t u1 = u % 1000000000;
		1474	uint64_t u2 = u / 1000000000;
		1475
		1476	ptr = ecb_i2a_x10 (ptr, u2);
		1477	ptr = ecb_i2a_09 (ptr, u1);
		1478	}
		1479	else
		1480	{
		1481	uint64_t u1 = u % 1000000000;
		1482	uint64_t ua = u / 1000000000;
		1483	uint64_t u2 = ua % 1000000000;
		1484	uint64_t u3 = ua / 1000000000;
		1485
		1486	ptr = ecb_i2a_2 (ptr, u3);
		1487	ptr = ecb_i2a_09 (ptr, u2);
		1488	ptr = ecb_i2a_09 (ptr, u1);
		1489	}
		1490	#else
		1491	if (ecb_expect_true (u <= ECB_I2A_MAX_X5))
		1492	ptr = ecb_i2a_x5 (ptr, u);
		1493	else
		1494	{
		1495	uint64_t u1 = u % 10000;
		1496	uint64_t u2 = u / 10000;
		1497
		1498	ptr = ecb_i2a_u64 (ptr, u2);
		1499	ptr = ecb_i2a_04 (ptr, u1);
		1500	}
		1501	#endif
		1502
		1503	return ptr;
		1504	}
		1505
		1506	ecb_inline char *
		1507	ecb_i2a_i64 (char *ptr, int64_t v)
		1508	{
		1509	*ptr = '-'; ptr += v < 0;
		1510	uint64_t u = v < 0 ? -(uint64_t)v : v;
		1511
		1512	#if ECB_64BIT_NATIVE
		1513	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1514	ptr = ecb_i2a_x10 (ptr, u);
		1515	else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000))
		1516	{
		1517	uint64_t u1 = u % 1000000000;
		1518	uint64_t u2 = u / 1000000000;
		1519
		1520	ptr = ecb_i2a_x10 (ptr, u2);
		1521	ptr = ecb_i2a_09 (ptr, u1);
		1522	}
		1523	else
		1524	{
		1525	uint64_t u1 = u % 1000000000;
		1526	uint64_t ua = u / 1000000000;
		1527	uint64_t u2 = ua % 1000000000;
		1528	uint64_t u3 = ua / 1000000000;
		1529
		1530	/* 2**31 is 19 digits, so the top is exactly one digit */
		1531	*ptr++ = u3 + '0';
		1532	ptr = ecb_i2a_09 (ptr, u2);
		1533	ptr = ecb_i2a_09 (ptr, u1);
		1534	}
		1535	#else
		1536	ptr = ecb_i2a_u64 (ptr, u);
		1537	#endif
		1538
		1539	return ptr;
		1540	}
		1541
		1542	/*******************************************************************************/
		1543	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		1544
		1545	/* basically, everything uses "ieee pure-endian" floating point numbers */
		1546	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		1547	#if 0 \
		1548	|| __i386 || __i386__ \
		1549	|| ECB_GCC_AMD64 \
		1550	|| __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
		1551	|| defined __s390__ || defined __s390x__ \
		1552	|| defined __mips__ \
		1553	|| defined __alpha__ \
		1554	|| defined __hppa__ \
		1555	|| defined __ia64__ \
		1556	|| defined __m68k__ \
		1557	|| defined __m88k__ \
		1558	|| defined __sh__ \
		1559	|| defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
		1560	|| (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
		1561	|| defined __aarch64__
		1562	#define ECB_STDFP 1
		1563	#else
		1564	#define ECB_STDFP 0
		1565	#endif
		1566
		1567	#ifndef ECB_NO_LIBM
		1568
		1569	#include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
		1570
		1571	/* only the oldest of old doesn't have this one. solaris. */
		1572	#ifdef INFINITY
		1573	#define ECB_INFINITY INFINITY
		1574	#else
		1575	#define ECB_INFINITY HUGE_VAL
		1576	#endif
		1577
		1578	#ifdef NAN
		1579	#define ECB_NAN NAN
		1580	#else
		1581	#define ECB_NAN ECB_INFINITY
		1582	#endif
		1583
		1584	#if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
		1585	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		1586	#define ecb_frexpf(x,e) frexpf ((x), (e))
		1587	#else
		1588	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		1589	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		1590	#endif
		1591
		1592	/* convert a float to ieee single/binary32 */
		1593	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		1594	ecb_function_ ecb_const uint32_t
		1595	ecb_float_to_binary32 (float x)
		1596	{
		1597	uint32_t r;
		1598
		1599	#if ECB_STDFP
		1600	memcpy (&r, &x, 4);
		1601	#else
		1602	/* slow emulation, works for anything but -0 */
		1603	uint32_t m;
		1604	int e;
		1605
		1606	if (x == 0e0f ) return 0x00000000U;
		1607	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		1608	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		1609	if (x != x ) return 0x7fbfffffU;
		1610
		1611	m = ecb_frexpf (x, &e) * 0x1000000U;
		1612
		1613	r = m & 0x80000000U;
		1614
		1615	if (r)
		1616	m = -m;
		1617
		1618	if (e <= -126)
		1619	{
		1620	m &= 0xffffffU;
		1621	m >>= (-125 - e);
		1622	e = -126;
		1623	}
		1624
		1625	r |= (e + 126) << 23;
		1626	r |= m & 0x7fffffU;
		1627	#endif
		1628
		1629	return r;
		1630	}
		1631
		1632	/* converts an ieee single/binary32 to a float */
		1633	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		1634	ecb_function_ ecb_const float
		1635	ecb_binary32_to_float (uint32_t x)
		1636	{
		1637	float r;
		1638
		1639	#if ECB_STDFP
		1640	memcpy (&r, &x, 4);
		1641	#else
		1642	/* emulation, only works for normals and subnormals and +0 */
		1643	int neg = x >> 31;
		1644	int e = (x >> 23) & 0xffU;
		1645
		1646	x &= 0x7fffffU;
		1647
		1648	if (e)
		1649	x |= 0x800000U;
		1650	else
		1651	e = 1;
		1652
		1653	/* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
		1654	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		1655
		1656	r = neg ? -r : r;
		1657	#endif
		1658
		1659	return r;
		1660	}
		1661
		1662	/* convert a double to ieee double/binary64 */
		1663	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		1664	ecb_function_ ecb_const uint64_t
		1665	ecb_double_to_binary64 (double x)
		1666	{
		1667	uint64_t r;
		1668
		1669	#if ECB_STDFP
		1670	memcpy (&r, &x, 8);
		1671	#else
		1672	/* slow emulation, works for anything but -0 */
		1673	uint64_t m;
		1674	int e;
		1675
		1676	if (x == 0e0 ) return 0x0000000000000000U;
		1677	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		1678	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		1679	if (x != x ) return 0X7ff7ffffffffffffU;
		1680
		1681	m = frexp (x, &e) * 0x20000000000000U;
		1682
		1683	r = m & 0x8000000000000000;;
		1684
		1685	if (r)
		1686	m = -m;
		1687
		1688	if (e <= -1022)
		1689	{
		1690	m &= 0x1fffffffffffffU;
		1691	m >>= (-1021 - e);
		1692	e = -1022;
		1693	}
		1694
		1695	r |= ((uint64_t)(e + 1022)) << 52;
		1696	r |= m & 0xfffffffffffffU;
		1697	#endif
		1698
		1699	return r;
		1700	}
		1701
		1702	/* converts an ieee double/binary64 to a double */
		1703	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		1704	ecb_function_ ecb_const double
		1705	ecb_binary64_to_double (uint64_t x)
		1706	{
		1707	double r;
		1708
		1709	#if ECB_STDFP
		1710	memcpy (&r, &x, 8);
		1711	#else
		1712	/* emulation, only works for normals and subnormals and +0 */
		1713	int neg = x >> 63;
		1714	int e = (x >> 52) & 0x7ffU;
		1715
		1716	x &= 0xfffffffffffffU;
		1717
		1718	if (e)
		1719	x |= 0x10000000000000U;
		1720	else
		1721	e = 1;
		1722
		1723	/* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
		1724	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		1725
		1726	r = neg ? -r : r;
		1727	#endif
		1728
		1729	return r;
		1730	}
		1731
		1732	/* convert a float to ieee half/binary16 */
		1733	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1734	ecb_function_ ecb_const uint16_t
		1735	ecb_float_to_binary16 (float x)
		1736	{
		1737	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1738	}
		1739
		1740	/* convert an ieee half/binary16 to float */
		1741	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1742	ecb_function_ ecb_const float
		1743	ecb_binary16_to_float (uint16_t x)
		1744	{
		1745	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1746	}
		1747
		1748	#endif
		1749
		1750	#endif
		1751

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