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Comparing libecb/ecb.h (file contents):
Revision 1.82 by root, Fri Mar 23 19:05:22 2012 UTC vs.
Revision 1.206 by root, Fri Mar 25 14:33:02 2022 UTC

1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2012 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 0x0001000c
		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	174	#if ECB_NO_THREADS
72	# define ECB_NO_SMP 1	175	#define ECB_NO_SMP 1
73	#endif	176	#endif
74		177
75	#if ECB_NO_THREADS || ECB_NO_SMP	178	#if ECB_NO_SMP
76	#define ECB_MEMORY_FENCE do { } while (0)	179	#define ECB_MEMORY_FENCE do { } while (0)
77	#endif	180	#endif
78		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
79	#ifndef ECB_MEMORY_FENCE	191	#ifndef ECB_MEMORY_FENCE
80	#if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110	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")
81	#if __i386 || __i386__	194	#if __i386 || __i386__
82	#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")
83	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	196	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
84	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	197	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
85	#elif __amd64 || __amd64__ || __x86_64 || __x86_64__	198	#elif ECB_GCC_AMD64
86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	199	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
87	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	200	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
88	#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")
89	#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__	202	#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
90	#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 */
91	#elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \	211	#elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
92	|| defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)	212	|| defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
		213	|| defined __ARM_ARCH_6T2__
93	#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")
94	#elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \	215	#elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
95	|| defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )	216	|| defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
96	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	217	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
97	#elif __sparc || __sparc__	218	#elif __aarch64__
		219	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		220	#elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
98	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")	221	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
99	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")	222	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
100	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")	223	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
101	#elif defined(__s390__) || defined(__s390x__)	224	#elif defined __s390__ || defined __s390x__
102	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	225	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
103	#elif defined(__mips__)	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__
104	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	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")
105	#endif	243	#endif
106	#endif	244	#endif
107	#endif	245	#endif
108		246
109	#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	#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
110	#if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)	264	#elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
111	#define ECB_MEMORY_FENCE __sync_synchronize ()	265	#define ECB_MEMORY_FENCE __sync_synchronize ()
112	/*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */	266	#elif _MSC_VER >= 1500 /* VC++ 2008 */
113	/*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */	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()
114	#elif _MSC_VER >= 1400 /* VC++ 2005 */	272	#elif _MSC_VER >= 1400 /* VC++ 2005 */
115	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	273	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
116	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	274	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
117	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	275	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
118	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	276	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
119	#elif defined(_WIN32)	277	#elif defined _WIN32
120	#include <WinNT.h>	278	#include <WinNT.h>
121	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	279	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
122	#elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110	280	#elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
123	#include <mbarrier.h>	281	#include <mbarrier.h>
124	#define ECB_MEMORY_FENCE __machine_rw_barrier ()	282	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
125	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()	283	#define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
126	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()	284	#define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
		285	#define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
127	#elif __xlC__	286	#elif __xlC__
128	#define ECB_MEMORY_FENCE __lwsync ()	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)
129	#endif	299	#endif
130	#endif	300	#endif
131		301
132	#ifndef ECB_MEMORY_FENCE	302	#ifndef ECB_MEMORY_FENCE
133	#if !ECB_AVOID_PTHREADS	303	#if !ECB_AVOID_PTHREADS
…		…
145	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;	315	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
146	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)	316	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
147	#endif	317	#endif
148	#endif	318	#endif
149		319
150	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)	320	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
151	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE	321	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
152	#endif	322	#endif
153		323
154	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)	324	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
155	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	325	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
156	#endif	326	#endif
157		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
158	/*****************************************************************************/	332	/*****************************************************************************/
159		333
160	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	334	#if ECB_CPP
161
162	#if __cplusplus
163	#define ecb_inline static inline	335	#define ecb_inline static inline
164	#elif ECB_GCC_VERSION(2,5)	336	#elif ECB_GCC_VERSION(2,5)
165	#define ecb_inline static __inline__	337	#define ecb_inline static __inline__
166	#elif ECB_C99	338	#elif ECB_C99
167	#define ecb_inline static inline	339	#define ecb_inline static inline
…		…
181		353
182	#define ECB_CONCAT_(a, b) a ## b	354	#define ECB_CONCAT_(a, b) a ## b
183	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	355	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
184	#define ECB_STRINGIFY_(a) # a	356	#define ECB_STRINGIFY_(a) # a
185	#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))
186		359
187	#define ecb_function_ ecb_inline	360	#define ecb_function_ ecb_inline
188		361
189	#if ECB_GCC_VERSION(3,1)	362	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
190	#define ecb_attribute(attrlist) __attribute__(attrlist)	363	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		364	#else
		365	#define ecb_attribute(attrlist)
		366	#endif
		367
		368	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
191	#define ecb_is_constant(expr) __builtin_constant_p (expr)	369	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		370	#else
		371	/* possible C11 impl for integral types
		372	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		373	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
		374
		375	#define ecb_is_constant(expr) 0
		376	#endif
		377
		378	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
192	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	379	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		380	#else
		381	#define ecb_expect(expr,value) (expr)
		382	#endif
		383
		384	#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
193	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	385	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
194	#else	386	#else
195	#define ecb_attribute(attrlist)
196	#define ecb_is_constant(expr) 0
197	#define ecb_expect(expr,value) (expr)
198	#define ecb_prefetch(addr,rw,locality)	387	#define ecb_prefetch(addr,rw,locality)
199	#endif	388	#endif
200		389
201	/* no emulation for ecb_decltype */	390	/* no emulation for ecb_decltype */
202	#if ECB_GCC_VERSION(4,5)	391	#if ECB_CPP11
		392	// older implementations might have problems with decltype(x)::type, work around it
		393	template<class T> struct ecb_decltype_t { typedef T type; };
203	#define ecb_decltype(x) __decltype(x)	394	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
204	#elif ECB_GCC_VERSION(3,0)	395	#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
205	#define ecb_decltype(x) __typeof(x)	396	#define ecb_decltype(x) __typeof__ (x)
206	#endif	397	#endif
207		398
		399	#if _MSC_VER >= 1300
		400	#define ecb_deprecated __declspec (deprecated)
		401	#else
		402	#define ecb_deprecated ecb_attribute ((__deprecated__))
		403	#endif
		404
		405	#if _MSC_VER >= 1500
		406	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		407	#elif ECB_GCC_VERSION(4,5)
		408	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		409	#else
		410	#define ecb_deprecated_message(msg) ecb_deprecated
		411	#endif
		412
		413	#if _MSC_VER >= 1400
		414	#define ecb_noinline __declspec (noinline)
		415	#else
208	#define ecb_noinline ecb_attribute ((__noinline__))	416	#define ecb_noinline ecb_attribute ((__noinline__))
209	#define ecb_noreturn ecb_attribute ((__noreturn__))	417	#endif
		418
210	#define ecb_unused ecb_attribute ((__unused__))	419	#define ecb_unused ecb_attribute ((__unused__))
211	#define ecb_const ecb_attribute ((__const__))	420	#define ecb_const ecb_attribute ((__const__))
212	#define ecb_pure ecb_attribute ((__pure__))	421	#define ecb_pure ecb_attribute ((__pure__))
		422
		423	#if ECB_C11 || __IBMC_NORETURN
		424	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		425	#define ecb_noreturn _Noreturn
		426	#elif ECB_CPP11
		427	#define ecb_noreturn [[noreturn]]
		428	#elif _MSC_VER >= 1200
		429	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		430	#define ecb_noreturn __declspec (noreturn)
		431	#else
		432	#define ecb_noreturn ecb_attribute ((__noreturn__))
		433	#endif
213		434
214	#if ECB_GCC_VERSION(4,3)	435	#if ECB_GCC_VERSION(4,3)
215	#define ecb_artificial ecb_attribute ((__artificial__))	436	#define ecb_artificial ecb_attribute ((__artificial__))
216	#define ecb_hot ecb_attribute ((__hot__))	437	#define ecb_hot ecb_attribute ((__hot__))
217	#define ecb_cold ecb_attribute ((__cold__))	438	#define ecb_cold ecb_attribute ((__cold__))
…		…
229	/* for compatibility to the rest of the world */	450	/* for compatibility to the rest of the world */
230	#define ecb_likely(expr) ecb_expect_true (expr)	451	#define ecb_likely(expr) ecb_expect_true (expr)
231	#define ecb_unlikely(expr) ecb_expect_false (expr)	452	#define ecb_unlikely(expr) ecb_expect_false (expr)
232		453
233	/* count trailing zero bits and count # of one bits */	454	/* count trailing zero bits and count # of one bits */
234	#if ECB_GCC_VERSION(3,4)	455	#if ECB_GCC_VERSION(3,4) \
235	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	456	|| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
236	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	457	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
237	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	458	&& ECB_CLANG_BUILTIN(__builtin_popcount))
238	#define ecb_ctz32(x) __builtin_ctz (x)	459	#define ecb_ctz32(x) __builtin_ctz (x)
		460	#define ecb_ctz64(x) (__SIZEOF_LONG__ == 64 ? __builtin_ctzl (x) : __builtin_ctzll (x))
239	#define ecb_ctz64(x) __builtin_ctzll (x)	461	#define ecb_clz32(x) __builtin_clz (x)
		462	#define ecb_clz64(x) (__SIZEOF_LONG__ == 64 ? __builtin_clzl (x) : __builtin_clzll (x))
		463	#define ecb_ld32(x) (ecb_clz32 (x) ^ 31)
		464	#define ecb_ld64(x) (ecb_clz64 (x) ^ 63)
240	#define ecb_popcount32(x) __builtin_popcount (x)	465	#define ecb_popcount32(x) __builtin_popcount (x)
241	/* no popcountll */	466	/* ecb_popcount64 is more difficult, see below */
242	#else	467	#else
243	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	468	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
244	ecb_function_ int	469	ecb_function_ ecb_const int
245	ecb_ctz32 (uint32_t x)	470	ecb_ctz32 (uint32_t x)
246	{	471	{
		472	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		473	unsigned long r;
		474	_BitScanForward (&r, x);
		475	return (int)r;
		476	#else
247	int r = 0;	477	int r = 0;
		478
		479	/* todo: use david seal's algorithm */
248		480
249	x &= ~x + 1; /* this isolates the lowest bit */	481	x &= ~x + 1; /* this isolates the lowest bit */
250		482
251	#if ECB_branchless_on_i386	483	#if ECB_branchless_on_i386
252	r += !!(x & 0xaaaaaaaa) << 0;	484	r += !!(x & 0xaaaaaaaa) << 0;
…		…
261	if (x & 0xff00ff00) r += 8;	493	if (x & 0xff00ff00) r += 8;
262	if (x & 0xffff0000) r += 16;	494	if (x & 0xffff0000) r += 16;
263	#endif	495	#endif
264		496
265	return r;	497	return r;
		498	#endif
266	}	499	}
267		500
268	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	501	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
269	ecb_function_ int	502	ecb_function_ ecb_const int
270	ecb_ctz64 (uint64_t x)	503	ecb_ctz64 (uint64_t x)
271	{	504	{
		505	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		506	unsigned long r;
		507	_BitScanForward64 (&r, x);
		508	return (int)r;
		509	#else
272	int shift = x & 0xffffffffU ? 0 : 32;	510	int shift = x & 0xffffffff ? 0 : 32;
273	return ecb_ctz32 (x >> shift) + shift;	511	return ecb_ctz32 (x >> shift) + shift;
		512	#endif
274	}	513	}
275		514
276	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	515	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
277	ecb_function_ int	516	ecb_function_ ecb_const int
278	ecb_popcount32 (uint32_t x)	517	ecb_popcount32 (uint32_t x)
279	{	518	{
280	x -= (x >> 1) & 0x55555555;	519	x -= (x >> 1) & 0x55555555;
281	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	520	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
282	x = ((x >> 4) + x) & 0x0f0f0f0f;	521	x = ((x >> 4) + x) & 0x0f0f0f0f;
283	x *= 0x01010101;	522	x *= 0x01010101;
284		523
285	return x >> 24;	524	return x >> 24;
286	}	525	}
287		526
288	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	527	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
289	ecb_function_ int ecb_ld32 (uint32_t x)	528	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
290	{	529	{
		530	#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
		531	unsigned long r;
		532	_BitScanReverse (&r, x);
		533	return (int)r;
		534	#else
291	int r = 0;	535	int r = 0;
292		536
293	if (x >> 16) { x >>= 16; r += 16; }	537	if (x >> 16) { x >>= 16; r += 16; }
294	if (x >> 8) { x >>= 8; r += 8; }	538	if (x >> 8) { x >>= 8; r += 8; }
295	if (x >> 4) { x >>= 4; r += 4; }	539	if (x >> 4) { x >>= 4; r += 4; }
296	if (x >> 2) { x >>= 2; r += 2; }	540	if (x >> 2) { x >>= 2; r += 2; }
297	if (x >> 1) { r += 1; }	541	if (x >> 1) { r += 1; }
298		542
299	return r;	543	return r;
		544	#endif
300	}	545	}
301		546
302	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	547	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
303	ecb_function_ int ecb_ld64 (uint64_t x)	548	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
304	{	549	{
		550	#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
		551	unsigned long r;
		552	_BitScanReverse64 (&r, x);
		553	return (int)r;
		554	#else
305	int r = 0;	555	int r = 0;
306		556
307	if (x >> 32) { x >>= 32; r += 32; }	557	if (x >> 32) { x >>= 32; r += 32; }
308		558
309	return r + ecb_ld32 (x);	559	return r + ecb_ld32 (x);
		560	#endif
310	}	561	}
311	#endif	562	#endif
312		563
		564	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		565	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		566	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		567	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		568
313	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	569	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
314	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	570	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
315	{	571	{
316	return ( (x * 0x0802U & 0x22110U)	572	return ( (x * 0x0802U & 0x22110U)
317	| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	573	| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
318	}	574	}
319		575
320	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	576	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
321	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	577	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
322	{	578	{
323	x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);	579	x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
324	x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);	580	x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
325	x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);	581	x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
326	x = ( x >> 8 ) | ( x << 8);	582	x = ( x >> 8 ) | ( x << 8);
327		583
328	return x;	584	return x;
329	}	585	}
330		586
331	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	587	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
332	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	588	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
333	{	589	{
334	x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);	590	x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
335	x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);	591	x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
336	x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);	592	x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
337	x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);	593	x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
338	x = ( x >> 16 ) | ( x << 16);	594	x = ( x >> 16 ) | ( x << 16);
339		595
340	return x;	596	return x;
341	}	597	}
342		598
343	/* popcount64 is only available on 64 bit cpus as gcc builtin */
344	/* so for this version we are lazy */
345	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	599	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
346	ecb_function_ int	600	ecb_function_ ecb_const int
347	ecb_popcount64 (uint64_t x)	601	ecb_popcount64 (uint64_t x)
348	{	602	{
		603	/* popcount64 is only available on 64 bit cpus as gcc builtin. */
		604	/* also, gcc/clang make this surprisingly difficult to use */
		605	#if __LP64__ && (ECB_GCC_VERSION(3,4) || ECB_CLANG_BUILTIN (__builtin_popcountl))
		606	return __builtin_popcountl (x);
		607	#else
349	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	608	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
		609	#endif
350	}	610	}
351		611
352	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	612	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
353	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	613	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
354	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	614	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
355	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	615	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
356	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	616	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
357	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	617	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
358	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	618	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
359	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	619	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
360		620
361	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }	621	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> (-count & 7)) | (x << (count & 7)); }
362	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }	622	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << (-count & 7)) | (x >> (count & 7)); }
363	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }	623	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (-count & 15)) | (x << (count & 15)); }
364	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }	624	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (-count & 15)) | (x >> (count & 15)); }
365	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }	625	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (-count & 31)) | (x << (count & 31)); }
366	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }	626	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (-count & 31)) | (x >> (count & 31)); }
367	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }	627	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (-count & 63)) | (x << (count & 63)); }
368	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }	628	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (-count & 63)) | (x >> (count & 63)); }
369		629
370	#if ECB_GCC_VERSION(4,3)	630	#if ECB_CPP
		631
		632	inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
		633	inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
		634	inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
		635	inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
		636
		637	inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
		638	inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
		639	inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
		640	inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
		641
		642	inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
		643	inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
		644	inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
		645	inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
		646
		647	inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
		648	inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
		649	inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
		650	inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
		651
		652	inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
		653	inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
		654	inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
		655
		656	inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
		657	inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
		658	inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
		659	inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
		660
		661	inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
		662	inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
		663	inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
		664	inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
		665
		666	#endif
		667
		668	#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		669	#if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
		670	#define ecb_bswap16(x) __builtin_bswap16 (x)
		671	#else
371	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	672	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		673	#endif
372	#define ecb_bswap32(x) __builtin_bswap32 (x)	674	#define ecb_bswap32(x) __builtin_bswap32 (x)
373	#define ecb_bswap64(x) __builtin_bswap64 (x)	675	#define ecb_bswap64(x) __builtin_bswap64 (x)
		676	#elif _MSC_VER
		677	#include <stdlib.h>
		678	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		679	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		680	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
374	#else	681	#else
375	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	682	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
376	ecb_function_ uint16_t	683	ecb_function_ ecb_const uint16_t
377	ecb_bswap16 (uint16_t x)	684	ecb_bswap16 (uint16_t x)
378	{	685	{
379	return ecb_rotl16 (x, 8);	686	return ecb_rotl16 (x, 8);
380	}	687	}
381		688
382	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	689	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
383	ecb_function_ uint32_t	690	ecb_function_ ecb_const uint32_t
384	ecb_bswap32 (uint32_t x)	691	ecb_bswap32 (uint32_t x)
385	{	692	{
386	return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);	693	return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
387	}	694	}
388		695
389	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	696	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
390	ecb_function_ uint64_t	697	ecb_function_ ecb_const uint64_t
391	ecb_bswap64 (uint64_t x)	698	ecb_bswap64 (uint64_t x)
392	{	699	{
393	return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);	700	return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
394	}	701	}
395	#endif	702	#endif
396		703
397	#if ECB_GCC_VERSION(4,5)	704	#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
398	#define ecb_unreachable() __builtin_unreachable ()	705	#define ecb_unreachable() __builtin_unreachable ()
399	#else	706	#else
400	/* this seems to work fine, but gcc always emits a warning for it :/ */	707	/* this seems to work fine, but gcc always emits a warning for it :/ */
401	ecb_inline void ecb_unreachable (void) ecb_noreturn;	708	ecb_inline ecb_noreturn void ecb_unreachable (void);
402	ecb_inline void ecb_unreachable (void) { }	709	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
403	#endif	710	#endif
404		711
405	/* try to tell the compiler that some condition is definitely true */	712	/* try to tell the compiler that some condition is definitely true */
406	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	713	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
407		714
408	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	715	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
409	ecb_inline unsigned char	716	ecb_inline ecb_const uint32_t
410	ecb_byteorder_helper (void)	717	ecb_byteorder_helper (void)
411	{	718	{
412	const uint32_t u = 0x11223344;	719	/* the union code still generates code under pressure in gcc, */
413	return *(unsigned char *)&u;	720	/* but less than using pointers, and always seems to */
		721	/* successfully return a constant. */
		722	/* the reason why we have this horrible preprocessor mess */
		723	/* is to avoid it in all cases, at least on common architectures */
		724	/* or when using a recent enough gcc version (>= 4.6) */
		725	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		726	|| ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
		727	#define ECB_LITTLE_ENDIAN 1
		728	return 0x44332211;
		729	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		730	|| ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
		731	#define ECB_BIG_ENDIAN 1
		732	return 0x11223344;
		733	#else
		734	union
		735	{
		736	uint8_t c[4];
		737	uint32_t u;
		738	} u = { 0x11, 0x22, 0x33, 0x44 };
		739	return u.u;
		740	#endif
414	}	741	}
415		742
416	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	743	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
417	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	744	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
418	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	745	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
419	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	746	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
		747
		748	/*****************************************************************************/
		749	/* unaligned load/store */
		750
		751	ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		752	ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		753	ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		754
		755	ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		756	ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		757	ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		758
		759	ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		760	ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		761	ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		762
		763	ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
		764	ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
		765	ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
		766
		767	ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
		768	ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
		769	ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
		770
		771	ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		772	ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		773	ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		774
		775	ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		776	ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		777	ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		778
		779	ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
		780	ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
		781	ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
		782
		783	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)); }
		784	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)); }
		785	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)); }
		786
		787	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)); }
		788	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)); }
		789	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)); }
		790
		791	#if ECB_CPP
		792
		793	inline uint8_t ecb_bswap (uint8_t v) { return v; }
		794	inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
		795	inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
		796	inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
		797
		798	template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		799	template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		800	template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
		801	template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
		802	template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
		803	template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
		804	template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
		805	template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
		806
		807	template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		808	template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		809	template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
		810	template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
		811	template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
		812	template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
		813	template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
		814	template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
		815
		816	#endif
		817
		818	/*****************************************************************************/
		819	/* pointer/integer hashing */
		820
		821	/* based on hash by Chris Wellons, https://nullprogram.com/blog/2018/07/31/ */
		822	ecb_function_ uint32_t ecb_mix32 (uint32_t v);
		823	ecb_function_ uint32_t ecb_mix32 (uint32_t v)
		824	{
		825	v ^= v >> 16; v *= 0x7feb352dU;
		826	v ^= v >> 15; v *= 0x846ca68bU;
		827	v ^= v >> 16;
		828	return v;
		829	}
		830
		831	ecb_function_ uint32_t ecb_unmix32 (uint32_t v);
		832	ecb_function_ uint32_t ecb_unmix32 (uint32_t v)
		833	{
		834	v ^= v >> 16 ; v *= 0x43021123U;
		835	v ^= v >> 15 ^ v >> 30; v *= 0x1d69e2a5U;
		836	v ^= v >> 16 ;
		837	return v;
		838	}
		839
		840	/* based on splitmix64, by Sebastiona Vigna, https://prng.di.unimi.it/splitmix64.c */
		841	ecb_function_ uint64_t ecb_mix64 (uint64_t v);
		842	ecb_function_ uint64_t ecb_mix64 (uint64_t v)
		843	{
		844	v ^= v >> 30; v *= 0xbf58476d1ce4e5b9U;
		845	v ^= v >> 27; v *= 0x94d049bb133111ebU;
		846	v ^= v >> 31;
		847	return v;
		848	}
		849
		850	ecb_function_ uint64_t ecb_unmix64 (uint64_t v);
		851	ecb_function_ uint64_t ecb_unmix64 (uint64_t v)
		852	{
		853	v ^= v >> 31 ^ v >> 62; v *= 0x319642b2d24d8ec3U;
		854	v ^= v >> 27 ^ v >> 54; v *= 0x96de1b173f119089U;
		855	v ^= v >> 30 ^ v >> 60;
		856	return v;
		857	}
		858
		859	ecb_function_ uintptr_t ecb_ptrmix (void *p);
		860	ecb_function_ uintptr_t ecb_ptrmix (void *p)
		861	{
		862	#if ECB_PTRSIZE <= 4
		863	return ecb_mix32 ((uint32_t)p);
		864	#else
		865	return ecb_mix64 ((uint64_t)p);
		866	#endif
		867	}
		868
		869	ecb_function_ void *ecb_ptrunmix (uintptr_t v);
		870	ecb_function_ void *ecb_ptrunmix (uintptr_t v)
		871	{
		872	#if ECB_PTRSIZE <= 4
		873	return (void *)ecb_unmix32 (v);
		874	#else
		875	return (void *)ecb_unmix64 (v);
		876	#endif
		877	}
		878
		879	#if ECB_CPP
		880
		881	template<typename T>
		882	inline uintptr_t ecb_ptrmix (T *p)
		883	{
		884	return ecb_ptrmix (static_cast<void *>(p));
		885	}
		886
		887	template<typename T>
		888	inline T *ecb_ptrunmix (uintptr_t v)
		889	{
		890	return static_cast<T *>(ecb_ptrunmix (v));
		891	}
		892
		893	#endif
		894
		895	/*****************************************************************************/
		896	/* gray code */
		897
		898	ecb_function_ uint_fast8_t ecb_gray8_encode (uint_fast8_t b) { return b ^ (b >> 1); }
		899	ecb_function_ uint_fast16_t ecb_gray16_encode (uint_fast16_t b) { return b ^ (b >> 1); }
		900	ecb_function_ uint_fast32_t ecb_gray32_encode (uint_fast32_t b) { return b ^ (b >> 1); }
		901	ecb_function_ uint_fast64_t ecb_gray64_encode (uint_fast64_t b) { return b ^ (b >> 1); }
		902
		903	ecb_function_ uint8_t ecb_gray8_decode (uint8_t g)
		904	{
		905	g ^= g >> 1;
		906	g ^= g >> 2;
		907	g ^= g >> 4;
		908
		909	return g;
		910	}
		911
		912	ecb_function_ uint16_t ecb_gray16_decode (uint16_t g)
		913	{
		914	g ^= g >> 1;
		915	g ^= g >> 2;
		916	g ^= g >> 4;
		917	g ^= g >> 8;
		918
		919	return g;
		920	}
		921
		922	ecb_function_ uint32_t ecb_gray32_decode (uint32_t g)
		923	{
		924	g ^= g >> 1;
		925	g ^= g >> 2;
		926	g ^= g >> 4;
		927	g ^= g >> 8;
		928	g ^= g >> 16;
		929
		930	return g;
		931	}
		932
		933	ecb_function_ uint64_t ecb_gray64_decode (uint64_t g)
		934	{
		935	g ^= g >> 1;
		936	g ^= g >> 2;
		937	g ^= g >> 4;
		938	g ^= g >> 8;
		939	g ^= g >> 16;
		940	g ^= g >> 32;
		941
		942	return g;
		943	}
		944
		945	#if ECB_CPP
		946
		947	ecb_function_ uint8_t ecb_gray_encode (uint8_t b) { return ecb_gray8_encode (b); }
		948	ecb_function_ uint16_t ecb_gray_encode (uint16_t b) { return ecb_gray16_encode (b); }
		949	ecb_function_ uint32_t ecb_gray_encode (uint32_t b) { return ecb_gray32_encode (b); }
		950	ecb_function_ uint64_t ecb_gray_encode (uint64_t b) { return ecb_gray64_encode (b); }
		951
		952	ecb_function_ uint8_t ecb_gray_decode (uint8_t g) { return ecb_gray8_decode (g); }
		953	ecb_function_ uint16_t ecb_gray_decode (uint16_t g) { return ecb_gray16_decode (g); }
		954	ecb_function_ uint32_t ecb_gray_decode (uint32_t g) { return ecb_gray32_decode (g); }
		955	ecb_function_ uint64_t ecb_gray_decode (uint64_t g) { return ecb_gray64_decode (g); }
		956
		957	#endif
		958
		959	/*****************************************************************************/
		960	/* 2d hilbert curves */
		961
		962	/* algorithm from the book Hacker's Delight, modified to not */
		963	/* run into undefined behaviour for n==16 */
		964	static uint32_t
		965	ecb_hilbert2d_index_to_coord32 (int n, uint32_t s)
		966	{
		967	uint32_t comp, swap, cs, t, sr;
		968
		969	/* pad s on the left (unused) bits with 01 (no change groups) */
		970	s |= 0x55555555U << n << n;
		971	/* "s shift right" */
		972	sr = (s >> 1) & 0x55555555U;
		973	/* compute complement and swap info in two-bit groups */
		974	cs = ((s & 0x55555555U) + sr) ^ 0x55555555U;
		975
		976	/* parallel prefix xor op to propagate both complement
		977	* and swap info together from left to right (there is
		978	* no step "cs ^= cs >> 1", so in effect it computes
		979	* two independent parallel prefix operations on two
		980	* interleaved sets of sixteen bits).
		981	*/
		982	cs ^= cs >> 2;
		983	cs ^= cs >> 4;
		984	cs ^= cs >> 8;
		985	cs ^= cs >> 16;
		986
		987	/* separate swap and complement bits */
		988	swap = cs & 0x55555555U;
		989	comp = (cs >> 1) & 0x55555555U;
		990
		991	/* calculate coordinates in odd and even bit positions */
		992	t = (s & swap) ^ comp;
		993	s = s ^ sr ^ t ^ (t << 1);
		994
		995	/* unpad/clear out any junk on the left */
		996	s = s & ((1 << n << n) - 1);
		997
		998	/* Now "unshuffle" to separate the x and y bits. */
		999	t = (s ^ (s >> 1)) & 0x22222222U; s ^= t ^ (t << 1);
		1000	t = (s ^ (s >> 2)) & 0x0c0c0c0cU; s ^= t ^ (t << 2);
		1001	t = (s ^ (s >> 4)) & 0x00f000f0U; s ^= t ^ (t << 4);
		1002	t = (s ^ (s >> 8)) & 0x0000ff00U; s ^= t ^ (t << 8);
		1003
		1004	/* now s contains two 16-bit coordinates */
		1005	return s;
		1006	}
		1007
		1008	/* 64 bit, a straightforward extension to the 32 bit case */
		1009	static uint64_t
		1010	ecb_hilbert2d_index_to_coord64 (int n, uint64_t s)
		1011	{
		1012	uint64_t comp, swap, cs, t, sr;
		1013
		1014	/* pad s on the left (unused) bits with 01 (no change groups) */
		1015	s |= 0x5555555555555555U << n << n;
		1016	/* "s shift right" */
		1017	sr = (s >> 1) & 0x5555555555555555U;
		1018	/* compute complement and swap info in two-bit groups */
		1019	cs = ((s & 0x5555555555555555U) + sr) ^ 0x5555555555555555U;
		1020
		1021	/* parallel prefix xor op to propagate both complement
		1022	* and swap info together from left to right (there is
		1023	* no step "cs ^= cs >> 1", so in effect it computes
		1024	* two independent parallel prefix operations on two
		1025	* interleaved sets of thirty-two bits).
		1026	*/
		1027	cs ^= cs >> 2;
		1028	cs ^= cs >> 4;
		1029	cs ^= cs >> 8;
		1030	cs ^= cs >> 16;
		1031	cs ^= cs >> 32;
		1032
		1033	/* separate swap and complement bits */
		1034	swap = cs & 0x5555555555555555U;
		1035	comp = (cs >> 1) & 0x5555555555555555U;
		1036
		1037	/* calculate coordinates in odd and even bit positions */
		1038	t = (s & swap) ^ comp;
		1039	s = s ^ sr ^ t ^ (t << 1);
		1040
		1041	/* unpad/clear out any junk on the left */
		1042	s = s & ((1 << n << n) - 1);
		1043
		1044	/* Now "unshuffle" to separate the x and y bits. */
		1045	t = (s ^ (s >> 1)) & 0x2222222222222222U; s ^= t ^ (t << 1);
		1046	t = (s ^ (s >> 2)) & 0x0c0c0c0c0c0c0c0cU; s ^= t ^ (t << 2);
		1047	t = (s ^ (s >> 4)) & 0x00f000f000f000f0U; s ^= t ^ (t << 4);
		1048	t = (s ^ (s >> 8)) & 0x0000ff000000ff00U; s ^= t ^ (t << 8);
		1049	t = (s ^ (s >> 16)) & 0x00000000ffff0000U; s ^= t ^ (t << 16);
		1050
		1051	/* now s contains two 32-bit coordinates */
		1052	return s;
		1053	}
		1054
		1055	/* algorithm from the book Hacker's Delight, but a similar algorithm*/
		1056	/* is given in https://doi.org/10.1002/spe.4380160103 */
		1057	/* this has been slightly improved over the original version */
		1058	ecb_function_ uint32_t
		1059	ecb_hilbert2d_coord_to_index32 (int n, uint32_t xy)
		1060	{
		1061	uint32_t row;
		1062	uint32_t state = 0;
		1063	uint32_t s = 0;
		1064
		1065	do
		1066	{
		1067	--n;
		1068
		1069	row = 4 * state
		1070	| (2 & (xy >> n >> 15))
		1071	| (1 & (xy >> n ));
		1072
		1073	/* these funky constants are lookup tables for two-bit values */
		1074	s = (s << 2) | (0x361e9cb4U >> 2 * row) & 3;
		1075	state = (0x8fe65831U >> 2 * row) & 3;
		1076	}
		1077	while (n > 0);
		1078
		1079	return s;
		1080	}
		1081
		1082	/* 64 bit, essentially the same as 32 bit */
		1083	ecb_function_ uint64_t
		1084	ecb_hilbert2d_coord_to_index64 (int n, uint64_t xy)
		1085	{
		1086	uint32_t row;
		1087	uint32_t state = 0;
		1088	uint64_t s = 0;
		1089
		1090	do
		1091	{
		1092	--n;
		1093
		1094	row = 4 * state
		1095	| (2 & (xy >> n >> 31))
		1096	| (1 & (xy >> n ));
		1097
		1098	/* these funky constants are lookup tables for two-bit values */
		1099	s = (s << 2) | (0x361e9cb4U >> 2 * row) & 3;
		1100	state = (0x8fe65831U >> 2 * row) & 3;
		1101	}
		1102	while (n > 0);
		1103
		1104	return s;
		1105	}
		1106
		1107	/*****************************************************************************/
		1108	/* division */
420		1109
421	#if ECB_GCC_VERSION(3,0) || ECB_C99	1110	#if ECB_GCC_VERSION(3,0) || ECB_C99
		1111	/* C99 tightened the definition of %, so we can use a more efficient version */
422	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	1112	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
423	#else	1113	#else
424	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	1114	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
425	#endif	1115	#endif
426		1116
427	#if __cplusplus	1117	#if ECB_CPP
428	template<typename T>	1118	template<typename T>
429	static inline T ecb_div_rd (T val, T div)	1119	static inline T ecb_div_rd (T val, T div)
430	{	1120	{
431	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	1121	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
432	}	1122	}
…		…
438	#else	1128	#else
439	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))	1129	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
440	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))	1130	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
441	#endif	1131	#endif
442		1132
		1133	/*****************************************************************************/
		1134	/* array length */
		1135
443	#if ecb_cplusplus_does_not_suck	1136	#if ecb_cplusplus_does_not_suck
444	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */	1137	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
445	template<typename T, int N>	1138	template<typename T, int N>
446	static inline int ecb_array_length (const T (&arr)[N])	1139	static inline int ecb_array_length (const T (&arr)[N])
447	{	1140	{
…		…
449	}	1142	}
450	#else	1143	#else
451	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	1144	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
452	#endif	1145	#endif
453		1146
		1147	/*****************************************************************************/
		1148	/* IEEE 754-2008 half float conversions */
		1149
		1150	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		1151	ecb_function_ ecb_const uint32_t
		1152	ecb_binary16_to_binary32 (uint32_t x)
		1153	{
		1154	unsigned int s = (x & 0x8000) << (31 - 15);
		1155	int e = (x >> 10) & 0x001f;
		1156	unsigned int m = x & 0x03ff;
		1157
		1158	if (ecb_expect_false (e == 31))
		1159	/* infinity or NaN */
		1160	e = 255 - (127 - 15);
		1161	else if (ecb_expect_false (!e))
		1162	{
		1163	if (ecb_expect_true (!m))
		1164	/* zero, handled by code below by forcing e to 0 */
		1165	e = 0 - (127 - 15);
		1166	else
		1167	{
		1168	/* subnormal, renormalise */
		1169	unsigned int s = 10 - ecb_ld32 (m);
		1170
		1171	m = (m << s) & 0x3ff; /* mask implicit bit */
		1172	e -= s - 1;
		1173	}
		1174	}
		1175
		1176	/* e and m now are normalised, or zero, (or inf or nan) */
		1177	e += 127 - 15;
		1178
		1179	return s | (e << 23) | (m << (23 - 10));
		1180	}
		1181
		1182	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		1183	ecb_function_ ecb_const uint16_t
		1184	ecb_binary32_to_binary16 (uint32_t x)
		1185	{
		1186	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		1187	int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		1188	unsigned int m = x & 0x007fffff;
		1189
		1190	x &= 0x7fffffff;
		1191
		1192	/* if it's within range of binary16 normals, use fast path */
		1193	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		1194	{
		1195	/* mantissa round-to-even */
		1196	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		1197
		1198	/* handle overflow */
		1199	if (ecb_expect_false (m >= 0x00800000))
		1200	{
		1201	m >>= 1;
		1202	e += 1;
		1203	}
		1204
		1205	return s | (e << 10) | (m >> (23 - 10));
		1206	}
		1207
		1208	/* handle large numbers and infinity */
		1209	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		1210	return s | 0x7c00;
		1211
		1212	/* handle zero, subnormals and small numbers */
		1213	if (ecb_expect_true (x < 0x38800000))
		1214	{
		1215	/* zero */
		1216	if (ecb_expect_true (!x))
		1217	return s;
		1218
		1219	/* handle subnormals */
		1220
		1221	/* too small, will be zero */
		1222	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		1223	return s;
		1224
		1225	m |= 0x00800000; /* make implicit bit explicit */
		1226
		1227	/* very tricky - we need to round to the nearest e (+10) bit value */
		1228	{
		1229	unsigned int bits = 14 - e;
		1230	unsigned int half = (1 << (bits - 1)) - 1;
		1231	unsigned int even = (m >> bits) & 1;
		1232
		1233	/* if this overflows, we will end up with a normalised number */
		1234	m = (m + half + even) >> bits;
		1235	}
		1236
		1237	return s | m;
		1238	}
		1239
		1240	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		1241	m >>= 13;
		1242
		1243	return s | 0x7c00 | m | !m;
		1244	}
		1245
		1246	/*******************************************************************************/
		1247	/* fast integer to ascii */
		1248
		1249	/*
		1250	* This code is pretty complicated because it is general. The idea behind it,
		1251	* however, is pretty simple: first, the number is multiplied with a scaling
		1252	* factor (2**bits / 10**(digits-1)) to convert the integer into a fixed-point
		1253	* number with the first digit in the upper bits.
		1254	* Then this digit is converted to text and masked out. The resulting number
		1255	* is then multiplied by 10, by multiplying the fixed point representation
		1256	* by 5 and shifting the (binary) decimal point one to the right, so a 4.28
		1257	* format becomes 5.27, 6.26 and so on.
		1258	* The rest involves only advancing the pointer if we already generated a
		1259	* non-zero digit, so leading zeroes are overwritten.
		1260	*/
		1261
		1262	/* simply return a mask with "bits" bits set */
		1263	#define ecb_i2a_mask(type,bits) ((((type)1) << (bits)) - 1)
		1264
		1265	/* oputput a single digit. maskvalue is 10**digitidx */
		1266	#define ecb_i2a_digit(type,bits,digitmask,maskvalue,digitidx) \
		1267	if (digitmask >= maskvalue) /* constant, used to decide how many digits to generate */ \
		1268	{ \
		1269	char digit = x >> (bits - digitidx); /* calculate the topmost digit */ \
		1270	*ptr = digit + '0'; /* output it */ \
		1271	nz = (digitmask == maskvalue) || nz || digit; /* first term == always output last digit */ \
		1272	ptr += nz; /* output digit only if non-zero digit seen */ \
		1273	x = (x & ecb_i2a_mask (type, bits - digitidx)) * 5; /* *10, but shift decimal point right */ \
		1274	}
		1275
		1276	/* convert integer to fixed point format and multiply out digits, highest first */
		1277	/* requires magic constants: max. digits and number of bits after the decimal point */
		1278	#define ecb_i2a_def(suffix,ptr,v,type,bits,digitmask,lz) \
		1279	ecb_inline char *ecb_i2a_ ## suffix (char *ptr, uint32_t u) \
		1280	{ \
		1281	char nz = lz; /* non-zero digit seen? */ \
		1282	/* convert to x.bits fixed-point */ \
		1283	type x = u * ((ecb_i2a_mask (type, bits) + digitmask) / digitmask); \
		1284	/* output up to 10 digits */ \
		1285	ecb_i2a_digit (type,bits,digitmask, 1, 0); \
		1286	ecb_i2a_digit (type,bits,digitmask, 10, 1); \
		1287	ecb_i2a_digit (type,bits,digitmask, 100, 2); \
		1288	ecb_i2a_digit (type,bits,digitmask, 1000, 3); \
		1289	ecb_i2a_digit (type,bits,digitmask, 10000, 4); \
		1290	ecb_i2a_digit (type,bits,digitmask, 100000, 5); \
		1291	ecb_i2a_digit (type,bits,digitmask, 1000000, 6); \
		1292	ecb_i2a_digit (type,bits,digitmask, 10000000, 7); \
		1293	ecb_i2a_digit (type,bits,digitmask, 100000000, 8); \
		1294	ecb_i2a_digit (type,bits,digitmask, 1000000000, 9); \
		1295	return ptr; \
		1296	}
		1297
		1298	/* predefined versions of the above, for various digits */
		1299	/* ecb_i2a_xN = almost N digits, limit defined by macro */
		1300	/* ecb_i2a_N = up to N digits, leading zeroes suppressed */
		1301	/* ecb_i2a_0N = exactly N digits, including leading zeroes */
		1302
		1303	/* non-leading-zero versions, limited range */
		1304	#define ECB_I2A_MAX_X5 59074 /* limit for ecb_i2a_x5 */
		1305	#define ECB_I2A_MAX_X10 2932500665 /* limit for ecb_i2a_x10 */
		1306	ecb_i2a_def ( x5, ptr, v, uint32_t, 26, 10000, 0)
		1307	ecb_i2a_def (x10, ptr, v, uint64_t, 60, 1000000000, 0)
		1308
		1309	/* non-leading zero versions, all digits, 4 and 9 are optimal for 32/64 bit */
		1310	ecb_i2a_def ( 2, ptr, v, uint32_t, 10, 10, 0)
		1311	ecb_i2a_def ( 3, ptr, v, uint32_t, 12, 100, 0)
		1312	ecb_i2a_def ( 4, ptr, v, uint32_t, 26, 1000, 0)
		1313	ecb_i2a_def ( 5, ptr, v, uint64_t, 30, 10000, 0)
		1314	ecb_i2a_def ( 6, ptr, v, uint64_t, 36, 100000, 0)
		1315	ecb_i2a_def ( 7, ptr, v, uint64_t, 44, 1000000, 0)
		1316	ecb_i2a_def ( 8, ptr, v, uint64_t, 50, 10000000, 0)
		1317	ecb_i2a_def ( 9, ptr, v, uint64_t, 56, 100000000, 0)
		1318
		1319	/* leading-zero versions, all digits, 04 and 09 are optimal for 32/64 bit */
		1320	ecb_i2a_def (02, ptr, v, uint32_t, 10, 10, 1)
		1321	ecb_i2a_def (03, ptr, v, uint32_t, 12, 100, 1)
		1322	ecb_i2a_def (04, ptr, v, uint32_t, 26, 1000, 1)
		1323	ecb_i2a_def (05, ptr, v, uint64_t, 30, 10000, 1)
		1324	ecb_i2a_def (06, ptr, v, uint64_t, 36, 100000, 1)
		1325	ecb_i2a_def (07, ptr, v, uint64_t, 44, 1000000, 1)
		1326	ecb_i2a_def (08, ptr, v, uint64_t, 50, 10000000, 1)
		1327	ecb_i2a_def (09, ptr, v, uint64_t, 56, 100000000, 1)
		1328
		1329	#define ECB_I2A_I32_DIGITS 11
		1330	#define ECB_I2A_U32_DIGITS 10
		1331	#define ECB_I2A_I64_DIGITS 20
		1332	#define ECB_I2A_U64_DIGITS 21
		1333	#define ECB_I2A_MAX_DIGITS 21
		1334
		1335	ecb_inline char *
		1336	ecb_i2a_u32 (char *ptr, uint32_t u)
		1337	{
		1338	#if ECB_64BIT_NATIVE
		1339	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1340	ptr = ecb_i2a_x10 (ptr, u);
		1341	else /* x10 almost, but not fully, covers 32 bit */
		1342	{
		1343	uint32_t u1 = u % 1000000000;
		1344	uint32_t u2 = u / 1000000000;
		1345
		1346	*ptr++ = u2 + '0';
		1347	ptr = ecb_i2a_09 (ptr, u1);
		1348	}
		1349	#else
		1350	if (ecb_expect_true (u <= ECB_I2A_MAX_X5))
		1351	ecb_i2a_x5 (ptr, u);
		1352	else if (ecb_expect_true (u <= ECB_I2A_MAX_X5 * 10000))
		1353	{
		1354	uint32_t u1 = u % 10000;
		1355	uint32_t u2 = u / 10000;
		1356
		1357	ptr = ecb_i2a_x5 (ptr, u2);
		1358	ptr = ecb_i2a_04 (ptr, u1);
		1359	}
		1360	else
		1361	{
		1362	uint32_t u1 = u % 10000;
		1363	uint32_t ua = u / 10000;
		1364	uint32_t u2 = ua % 10000;
		1365	uint32_t u3 = ua / 10000;
		1366
		1367	ptr = ecb_i2a_2 (ptr, u3);
		1368	ptr = ecb_i2a_04 (ptr, u2);
		1369	ptr = ecb_i2a_04 (ptr, u1);
		1370	}
454	#endif	1371	#endif
455		1372
		1373	return ptr;
		1374	}
		1375
		1376	ecb_inline char *
		1377	ecb_i2a_i32 (char *ptr, int32_t v)
		1378	{
		1379	*ptr = '-'; ptr += v < 0;
		1380	uint32_t u = v < 0 ? -(uint32_t)v : v;
		1381
		1382	#if ECB_64BIT_NATIVE
		1383	ptr = ecb_i2a_x10 (ptr, u); /* x10 fully covers 31 bit */
		1384	#else
		1385	ptr = ecb_i2a_u32 (ptr, u);
		1386	#endif
		1387
		1388	return ptr;
		1389	}
		1390
		1391	ecb_inline char *
		1392	ecb_i2a_u64 (char *ptr, uint64_t u)
		1393	{
		1394	#if ECB_64BIT_NATIVE
		1395	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1396	ptr = ecb_i2a_x10 (ptr, u);
		1397	else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000))
		1398	{
		1399	uint64_t u1 = u % 1000000000;
		1400	uint64_t u2 = u / 1000000000;
		1401
		1402	ptr = ecb_i2a_x10 (ptr, u2);
		1403	ptr = ecb_i2a_09 (ptr, u1);
		1404	}
		1405	else
		1406	{
		1407	uint64_t u1 = u % 1000000000;
		1408	uint64_t ua = u / 1000000000;
		1409	uint64_t u2 = ua % 1000000000;
		1410	uint64_t u3 = ua / 1000000000;
		1411
		1412	ptr = ecb_i2a_2 (ptr, u3);
		1413	ptr = ecb_i2a_09 (ptr, u2);
		1414	ptr = ecb_i2a_09 (ptr, u1);
		1415	}
		1416	#else
		1417	if (ecb_expect_true (u <= ECB_I2A_MAX_X5))
		1418	ptr = ecb_i2a_x5 (ptr, u);
		1419	else
		1420	{
		1421	uint64_t u1 = u % 10000;
		1422	uint64_t u2 = u / 10000;
		1423
		1424	ptr = ecb_i2a_u64 (ptr, u2);
		1425	ptr = ecb_i2a_04 (ptr, u1);
		1426	}
		1427	#endif
		1428
		1429	return ptr;
		1430	}
		1431
		1432	ecb_inline char *
		1433	ecb_i2a_i64 (char *ptr, int64_t v)
		1434	{
		1435	*ptr = '-'; ptr += v < 0;
		1436	uint64_t u = v < 0 ? -(uint64_t)v : v;
		1437
		1438	#if ECB_64BIT_NATIVE
		1439	if (ecb_expect_true (u <= ECB_I2A_MAX_X10))
		1440	ptr = ecb_i2a_x10 (ptr, u);
		1441	else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000))
		1442	{
		1443	uint64_t u1 = u % 1000000000;
		1444	uint64_t u2 = u / 1000000000;
		1445
		1446	ptr = ecb_i2a_x10 (ptr, u2);
		1447	ptr = ecb_i2a_09 (ptr, u1);
		1448	}
		1449	else
		1450	{
		1451	uint64_t u1 = u % 1000000000;
		1452	uint64_t ua = u / 1000000000;
		1453	uint64_t u2 = ua % 1000000000;
		1454	uint64_t u3 = ua / 1000000000;
		1455
		1456	/* 2**31 is 19 digits, so the top is exactly one digit */
		1457	*ptr++ = u3 + '0';
		1458	ptr = ecb_i2a_09 (ptr, u2);
		1459	ptr = ecb_i2a_09 (ptr, u1);
		1460	}
		1461	#else
		1462	ptr = ecb_i2a_u64 (ptr, u);
		1463	#endif
		1464
		1465	return ptr;
		1466	}
		1467
		1468	/*******************************************************************************/
		1469	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		1470
		1471	/* basically, everything uses "ieee pure-endian" floating point numbers */
		1472	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		1473	#if 0 \
		1474	|| __i386 || __i386__ \
		1475	|| ECB_GCC_AMD64 \
		1476	|| __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
		1477	|| defined __s390__ || defined __s390x__ \
		1478	|| defined __mips__ \
		1479	|| defined __alpha__ \
		1480	|| defined __hppa__ \
		1481	|| defined __ia64__ \
		1482	|| defined __m68k__ \
		1483	|| defined __m88k__ \
		1484	|| defined __sh__ \
		1485	|| defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
		1486	|| (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
		1487	|| defined __aarch64__
		1488	#define ECB_STDFP 1
		1489	#else
		1490	#define ECB_STDFP 0
		1491	#endif
		1492
		1493	#ifndef ECB_NO_LIBM
		1494
		1495	#include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
		1496
		1497	/* only the oldest of old doesn't have this one. solaris. */
		1498	#ifdef INFINITY
		1499	#define ECB_INFINITY INFINITY
		1500	#else
		1501	#define ECB_INFINITY HUGE_VAL
		1502	#endif
		1503
		1504	#ifdef NAN
		1505	#define ECB_NAN NAN
		1506	#else
		1507	#define ECB_NAN ECB_INFINITY
		1508	#endif
		1509
		1510	#if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
		1511	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		1512	#define ecb_frexpf(x,e) frexpf ((x), (e))
		1513	#else
		1514	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		1515	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		1516	#endif
		1517
		1518	/* convert a float to ieee single/binary32 */
		1519	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		1520	ecb_function_ ecb_const uint32_t
		1521	ecb_float_to_binary32 (float x)
		1522	{
		1523	uint32_t r;
		1524
		1525	#if ECB_STDFP
		1526	memcpy (&r, &x, 4);
		1527	#else
		1528	/* slow emulation, works for anything but -0 */
		1529	uint32_t m;
		1530	int e;
		1531
		1532	if (x == 0e0f ) return 0x00000000U;
		1533	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		1534	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		1535	if (x != x ) return 0x7fbfffffU;
		1536
		1537	m = ecb_frexpf (x, &e) * 0x1000000U;
		1538
		1539	r = m & 0x80000000U;
		1540
		1541	if (r)
		1542	m = -m;
		1543
		1544	if (e <= -126)
		1545	{
		1546	m &= 0xffffffU;
		1547	m >>= (-125 - e);
		1548	e = -126;
		1549	}
		1550
		1551	r |= (e + 126) << 23;
		1552	r |= m & 0x7fffffU;
		1553	#endif
		1554
		1555	return r;
		1556	}
		1557
		1558	/* converts an ieee single/binary32 to a float */
		1559	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		1560	ecb_function_ ecb_const float
		1561	ecb_binary32_to_float (uint32_t x)
		1562	{
		1563	float r;
		1564
		1565	#if ECB_STDFP
		1566	memcpy (&r, &x, 4);
		1567	#else
		1568	/* emulation, only works for normals and subnormals and +0 */
		1569	int neg = x >> 31;
		1570	int e = (x >> 23) & 0xffU;
		1571
		1572	x &= 0x7fffffU;
		1573
		1574	if (e)
		1575	x |= 0x800000U;
		1576	else
		1577	e = 1;
		1578
		1579	/* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
		1580	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		1581
		1582	r = neg ? -r : r;
		1583	#endif
		1584
		1585	return r;
		1586	}
		1587
		1588	/* convert a double to ieee double/binary64 */
		1589	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		1590	ecb_function_ ecb_const uint64_t
		1591	ecb_double_to_binary64 (double x)
		1592	{
		1593	uint64_t r;
		1594
		1595	#if ECB_STDFP
		1596	memcpy (&r, &x, 8);
		1597	#else
		1598	/* slow emulation, works for anything but -0 */
		1599	uint64_t m;
		1600	int e;
		1601
		1602	if (x == 0e0 ) return 0x0000000000000000U;
		1603	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		1604	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		1605	if (x != x ) return 0X7ff7ffffffffffffU;
		1606
		1607	m = frexp (x, &e) * 0x20000000000000U;
		1608
		1609	r = m & 0x8000000000000000;;
		1610
		1611	if (r)
		1612	m = -m;
		1613
		1614	if (e <= -1022)
		1615	{
		1616	m &= 0x1fffffffffffffU;
		1617	m >>= (-1021 - e);
		1618	e = -1022;
		1619	}
		1620
		1621	r |= ((uint64_t)(e + 1022)) << 52;
		1622	r |= m & 0xfffffffffffffU;
		1623	#endif
		1624
		1625	return r;
		1626	}
		1627
		1628	/* converts an ieee double/binary64 to a double */
		1629	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		1630	ecb_function_ ecb_const double
		1631	ecb_binary64_to_double (uint64_t x)
		1632	{
		1633	double r;
		1634
		1635	#if ECB_STDFP
		1636	memcpy (&r, &x, 8);
		1637	#else
		1638	/* emulation, only works for normals and subnormals and +0 */
		1639	int neg = x >> 63;
		1640	int e = (x >> 52) & 0x7ffU;
		1641
		1642	x &= 0xfffffffffffffU;
		1643
		1644	if (e)
		1645	x |= 0x10000000000000U;
		1646	else
		1647	e = 1;
		1648
		1649	/* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
		1650	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		1651
		1652	r = neg ? -r : r;
		1653	#endif
		1654
		1655	return r;
		1656	}
		1657
		1658	/* convert a float to ieee half/binary16 */
		1659	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1660	ecb_function_ ecb_const uint16_t
		1661	ecb_float_to_binary16 (float x)
		1662	{
		1663	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1664	}
		1665
		1666	/* convert an ieee half/binary16 to float */
		1667	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1668	ecb_function_ ecb_const float
		1669	ecb_binary16_to_float (uint16_t x)
		1670	{
		1671	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1672	}
		1673
		1674	#endif
		1675
		1676	#endif
		1677

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