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

Comparing libecb/ecb.h (file contents):
Revision 1.91 by root, Tue May 29 14:30:44 2012 UTC vs.
Revision 1.179 by root, Sat Dec 28 08:01:05 2019 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 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	/* 16 bits major, 16 bits minor */	44	/* 16 bits major, 16 bits minor */
34	#define ECB_VERSION 0x00010001	45	#define ECB_VERSION 0x00010007
35		46
36	#ifdef _WIN32	47	#ifdef _WIN32
37	typedef signed char int8_t;	48	typedef signed char int8_t;
38	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
39	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
54	#else	65	#else
55	#define ECB_PTRSIZE 4	66	#define ECB_PTRSIZE 4
56	typedef uint32_t uintptr_t;	67	typedef uint32_t uintptr_t;
57	typedef int32_t intptr_t;	68	typedef int32_t intptr_t;
58	#endif	69	#endif
59	typedef intptr_t ptrdiff_t;
60	#else	70	#else
61	#include <inttypes.h>	71	#include <inttypes.h>
62	#if UINTMAX_MAX > 0xffffffffU	72	#if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
63	#define ECB_PTRSIZE 8	73	#define ECB_PTRSIZE 8
64	#else	74	#else
65	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
		76	#endif
		77	#endif
		78
		79	#define ECB_GCC_AMD64 (__amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__)
		80	#define ECB_MSVC_AMD64 (_M_AMD64 \|\| _M_X64)
		81
		82	#ifndef ECB_OPTIMIZE_SIZE
		83	#if __OPTIMIZE_SIZE__
		84	#define ECB_OPTIMIZE_SIZE 1
		85	#else
		86	#define ECB_OPTIMIZE_SIZE 0
		87	#endif
		88	#endif
		89
		90	/* work around x32 idiocy by defining proper macros */
		91	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		92	#if _ILP32
		93	#define ECB_AMD64_X32 1
		94	#else
		95	#define ECB_AMD64 1
66	#endif	96	#endif
67	#endif	97	#endif
68		98
69	/* many compilers define _GNUC_ to some versions but then only implement	99	/* many compilers define _GNUC_ to some versions but then only implement
70	* what their idiot authors think are the "more important" extensions,	100	* what their idiot authors think are the "more important" extensions,
71	* causing enormous grief in return for some better fake benchmark numbers.	101	* causing enormous grief in return for some better fake benchmark numbers.
72	* or so.	102	* or so.
73	* we try to detect these and simply assume they are not gcc - if they have	103	* we try to detect these and simply assume they are not gcc - if they have
74	* an issue with that they should have done it right in the first place.	104	* an issue with that they should have done it right in the first place.
75	*/	105	*/
76	#ifndef ECB_GCC_VERSION
77	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	106	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
78	#define ECB_GCC_VERSION(major,minor) 0	107	#define ECB_GCC_VERSION(major,minor) 0
79	#else	108	#else
80	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	109	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
81	#endif	110	#endif
82	#endif
83		111
84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	112	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	113
86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	114	#if __clang__ && defined __has_builtin
		115	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		116	#else
		117	#define ECB_CLANG_BUILTIN(x) 0
		118	#endif
		119
		120	#if __clang__ && defined __has_extension
		121	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		122	#else
		123	#define ECB_CLANG_EXTENSION(x) 0
		124	#endif
		125
87	#define ECB_CPP (__cplusplus+0)	126	#define ECB_CPP (__cplusplus+0)
88	#define ECB_CPP98 (__cplusplus >= 199711L)
89	#define ECB_CPP11 (__cplusplus >= 201103L)	127	#define ECB_CPP11 (__cplusplus >= 201103L)
		128	#define ECB_CPP14 (__cplusplus >= 201402L)
		129	#define ECB_CPP17 (__cplusplus >= 201703L)
		130
		131	#if ECB_CPP
		132	#define ECB_C 0
		133	#define ECB_STDC_VERSION 0
		134	#else
		135	#define ECB_C 1
		136	#define ECB_STDC_VERSION __STDC_VERSION__
		137	#endif
		138
		139	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		140	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		141	#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
		142
		143	#if ECB_CPP
		144	#define ECB_EXTERN_C extern "C"
		145	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		146	#define ECB_EXTERN_C_END }
		147	#else
		148	#define ECB_EXTERN_C extern
		149	#define ECB_EXTERN_C_BEG
		150	#define ECB_EXTERN_C_END
		151	#endif
90		152
91	/*****************************************************************************/	153	/*****************************************************************************/
92		154
93	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	155	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
94	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	156	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
95		157
96	#if ECB_NO_THREADS	158	#if ECB_NO_THREADS
97	# define ECB_NO_SMP 1	159	#define ECB_NO_SMP 1
98	#endif	160	#endif
99		161
100	#if ECB_NO_THREADS \|\| ECB_NO_SMP	162	#if ECB_NO_SMP
101	#define ECB_MEMORY_FENCE do { } while (0)	163	#define ECB_MEMORY_FENCE do { } while (0)
102	#endif	164	#endif
103		165
104	#ifndef ECB_MEMORY_FENCE	166	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
105	#if ECB_C11 && !defined __STDC_NO_ATOMICS__	167	#if __xlC__ && ECB_CPP
106	/* we assume that these memory fences work on all variables/all memory accesses, */	168	#include <builtins.h>
107	/* not just C11 atomics and atomic accesses */
108	#include <stdatomic.h>
109	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_acq_rel)
110	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
111	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
112	#endif	169	#endif
		170
		171	#if 1400 <= _MSC_VER
		172	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
113	#endif	173	#endif
114		174
115	#ifndef ECB_MEMORY_FENCE	175	#ifndef ECB_MEMORY_FENCE
116	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	176	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		177	#define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
117	#if __i386 \|\| __i386__	178	#if __i386 \|\| __i386__
118	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
119	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	180	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
120	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	181	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
121	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	182	#elif ECB_GCC_AMD64
122	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	183	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
123	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	184	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
124	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	185	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
125	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	186	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	187	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		188	#elif defined __ARM_ARCH_2__ \
		189	\|\| defined __ARM_ARCH_3__ \|\| defined __ARM_ARCH_3M__ \
		190	\|\| defined __ARM_ARCH_4__ \|\| defined __ARM_ARCH_4T__ \
		191	\|\| defined __ARM_ARCH_5__ \|\| defined __ARM_ARCH_5E__ \
		192	\|\| defined __ARM_ARCH_5T__ \|\| defined __ARM_ARCH_5TE__ \
		193	\|\| defined __ARM_ARCH_5TEJ__
		194	/* should not need any, unless running old code on newer cpu - arm doesn't support that */
127	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \	195	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
128	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	196	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__ \
		197	\|\| defined __ARM_ARCH_6T2__
129	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	198	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
130	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	199	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
131	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	200	\|\| defined __ARM_ARCH_7R__ \|\| defined __ARM_ARCH_7M__
132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	201	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
133	#elif __sparc \|\| __sparc__	202	#elif __aarch64__
		203	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		204	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
134	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")	205	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
135	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	206	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
136	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	207	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
137	#elif defined __s390__ \|\| defined __s390x__	208	#elif defined __s390__ \|\| defined __s390x__
138	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	209	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
139	#elif defined __mips__	210	#elif defined __mips__
		211	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		212	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
140	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	213	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
141	#elif defined __alpha__	214	#elif defined __alpha__
142	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	215	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		216	#elif defined __hppa__
		217	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		218	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		219	#elif defined __ia64__
		220	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		221	#elif defined __m68k__
		222	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		223	#elif defined __m88k__
		224	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		225	#elif defined __sh__
		226	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
143	#endif	227	#endif
144	#endif	228	#endif
145	#endif	229	#endif
146		230
147	#ifndef ECB_MEMORY_FENCE	231	#ifndef ECB_MEMORY_FENCE
		232	#if ECB_GCC_VERSION(4,7)
		233	/* see comment below (stdatomic.h) about the C11 memory model. */
		234	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		235	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		236	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		237	#define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
		238
		239	#elif ECB_CLANG_EXTENSION(c_atomic)
		240	/* see comment below (stdatomic.h) about the C11 memory model. */
		241	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		242	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		243	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		244	#define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
		245
148	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	246	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
149	#define ECB_MEMORY_FENCE __sync_synchronize ()	247	#define ECB_MEMORY_FENCE __sync_synchronize ()
150	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	248	#elif _MSC_VER >= 1500 /* VC++ 2008 */
151	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	249	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		250	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		251	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		252	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		253	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
152	#elif _MSC_VER >= 1400 /* VC++ 2005 */	254	#elif _MSC_VER >= 1400 /* VC++ 2005 */
153	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	255	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
154	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	256	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
155	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	257	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
156	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	258	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
157	#elif defined _WIN32	259	#elif defined _WIN32
158	#include <WinNT.h>	260	#include <WinNT.h>
159	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	261	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
160	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	262	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
161	#include <mbarrier.h>	263	#include <mbarrier.h>
162	#define ECB_MEMORY_FENCE __machine_rw_barrier ()	264	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
163	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()	265	#define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
164	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()	266	#define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
		267	#define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
165	#elif __xlC__	268	#elif __xlC__
166	#define ECB_MEMORY_FENCE __sync ()	269	#define ECB_MEMORY_FENCE __sync ()
		270	#endif
		271	#endif
		272
		273	#ifndef ECB_MEMORY_FENCE
		274	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		275	/* we assume that these memory fences work on all variables/all memory accesses, */
		276	/* not just C11 atomics and atomic accesses */
		277	#include <stdatomic.h>
		278	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		279	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		280	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
167	#endif	281	#endif
168	#endif	282	#endif
169		283
170	#ifndef ECB_MEMORY_FENCE	284	#ifndef ECB_MEMORY_FENCE
171	#if !ECB_AVOID_PTHREADS	285	#if !ECB_AVOID_PTHREADS
…		…
191		305
192	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE	306	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
193	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	307	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
194	#endif	308	#endif
195		309
		310	#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
		311	#define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
		312	#endif
		313
196	/*****************************************************************************/	314	/*****************************************************************************/
197		315
198	#if __cplusplus	316	#if ECB_CPP
199	#define ecb_inline static inline	317	#define ecb_inline static inline
200	#elif ECB_GCC_VERSION(2,5)	318	#elif ECB_GCC_VERSION(2,5)
201	#define ecb_inline static __inline__	319	#define ecb_inline static __inline__
202	#elif ECB_C99	320	#elif ECB_C99
203	#define ecb_inline static inline	321	#define ecb_inline static inline
…		…
217		335
218	#define ECB_CONCAT_(a, b) a ## b	336	#define ECB_CONCAT_(a, b) a ## b
219	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	337	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
220	#define ECB_STRINGIFY_(a) # a	338	#define ECB_STRINGIFY_(a) # a
221	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	339	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		340	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
222		341
223	#define ecb_function_ ecb_inline	342	#define ecb_function_ ecb_inline
224		343
225	#if ECB_GCC_VERSION(3,1)	344	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
226	#define ecb_attribute(attrlist) __attribute__(attrlist)	345	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		346	#else
		347	#define ecb_attribute(attrlist)
		348	#endif
		349
		350	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
227	#define ecb_is_constant(expr) __builtin_constant_p (expr)	351	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		352	#else
		353	/* possible C11 impl for integral types
		354	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		355	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		356
		357	#define ecb_is_constant(expr) 0
		358	#endif
		359
		360	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
228	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	361	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		362	#else
		363	#define ecb_expect(expr,value) (expr)
		364	#endif
		365
		366	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
229	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	367	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
230	#else	368	#else
231	#define ecb_attribute(attrlist)
232	#define ecb_is_constant(expr) 0
233	#define ecb_expect(expr,value) (expr)
234	#define ecb_prefetch(addr,rw,locality)	369	#define ecb_prefetch(addr,rw,locality)
235	#endif	370	#endif
236		371
237	/* no emulation for ecb_decltype */	372	/* no emulation for ecb_decltype */
238	#if ECB_GCC_VERSION(4,5)	373	#if ECB_CPP11
		374	// older implementations might have problems with decltype(x)::type, work around it
		375	template<class T> struct ecb_decltype_t { typedef T type; };
239	#define ecb_decltype(x) __decltype(x)	376	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
240	#elif ECB_GCC_VERSION(3,0)	377	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
241	#define ecb_decltype(x) __typeof(x)	378	#define ecb_decltype(x) __typeof__ (x)
242	#endif	379	#endif
243		380
		381	#if _MSC_VER >= 1300
		382	#define ecb_deprecated __declspec (deprecated)
		383	#else
		384	#define ecb_deprecated ecb_attribute ((__deprecated__))
		385	#endif
		386
		387	#if _MSC_VER >= 1500
		388	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		389	#elif ECB_GCC_VERSION(4,5)
		390	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		391	#else
		392	#define ecb_deprecated_message(msg) ecb_deprecated
		393	#endif
		394
		395	#if _MSC_VER >= 1400
		396	#define ecb_noinline __declspec (noinline)
		397	#else
244	#define ecb_noinline ecb_attribute ((__noinline__))	398	#define ecb_noinline ecb_attribute ((__noinline__))
		399	#endif
		400
245	#define ecb_unused ecb_attribute ((__unused__))	401	#define ecb_unused ecb_attribute ((__unused__))
246	#define ecb_const ecb_attribute ((__const__))	402	#define ecb_const ecb_attribute ((__const__))
247	#define ecb_pure ecb_attribute ((__pure__))	403	#define ecb_pure ecb_attribute ((__pure__))
248		404
249	#if ECB_C11	405	#if ECB_C11 \|\| __IBMC_NORETURN
		406	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
250	#define ecb_noreturn _Noreturn	407	#define ecb_noreturn _Noreturn
		408	#elif ECB_CPP11
		409	#define ecb_noreturn [[noreturn]]
		410	#elif _MSC_VER >= 1200
		411	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		412	#define ecb_noreturn __declspec (noreturn)
251	#else	413	#else
252	#define ecb_noreturn ecb_attribute ((__noreturn__))	414	#define ecb_noreturn ecb_attribute ((__noreturn__))
253	#endif	415	#endif
254		416
255	#if ECB_GCC_VERSION(4,3)	417	#if ECB_GCC_VERSION(4,3)
…		…
270	/* for compatibility to the rest of the world */	432	/* for compatibility to the rest of the world */
271	#define ecb_likely(expr) ecb_expect_true (expr)	433	#define ecb_likely(expr) ecb_expect_true (expr)
272	#define ecb_unlikely(expr) ecb_expect_false (expr)	434	#define ecb_unlikely(expr) ecb_expect_false (expr)
273		435
274	/* count trailing zero bits and count # of one bits */	436	/* count trailing zero bits and count # of one bits */
275	#if ECB_GCC_VERSION(3,4)	437	#if ECB_GCC_VERSION(3,4) \
		438	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		439	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		440	&& ECB_CLANG_BUILTIN(__builtin_popcount))
276	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	441	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
277	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	442	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
278	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	443	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
279	#define ecb_ctz32(x) __builtin_ctz (x)	444	#define ecb_ctz32(x) __builtin_ctz (x)
280	#define ecb_ctz64(x) __builtin_ctzll (x)	445	#define ecb_ctz64(x) __builtin_ctzll (x)
281	#define ecb_popcount32(x) __builtin_popcount (x)	446	#define ecb_popcount32(x) __builtin_popcount (x)
282	/* no popcountll */	447	/* no popcountll */
283	#else	448	#else
284	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
285	ecb_function_ int	450	ecb_function_ ecb_const int
286	ecb_ctz32 (uint32_t x)	451	ecb_ctz32 (uint32_t x)
287	{	452	{
		453	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		454	unsigned long r;
		455	_BitScanForward (&r, x);
		456	return (int)r;
		457	#else
288	int r = 0;	458	int r = 0;
289		459
290	x &= ~x + 1; /* this isolates the lowest bit */	460	x &= ~x + 1; /* this isolates the lowest bit */
291		461
292	#if ECB_branchless_on_i386	462	#if ECB_branchless_on_i386
…		…
302	if (x & 0xff00ff00) r += 8;	472	if (x & 0xff00ff00) r += 8;
303	if (x & 0xffff0000) r += 16;	473	if (x & 0xffff0000) r += 16;
304	#endif	474	#endif
305		475
306	return r;	476	return r;
		477	#endif
307	}	478	}
308		479
309	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	480	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
310	ecb_function_ int	481	ecb_function_ ecb_const int
311	ecb_ctz64 (uint64_t x)	482	ecb_ctz64 (uint64_t x)
312	{	483	{
		484	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		485	unsigned long r;
		486	_BitScanForward64 (&r, x);
		487	return (int)r;
		488	#else
313	int shift = x & 0xffffffffU ? 0 : 32;	489	int shift = x & 0xffffffff ? 0 : 32;
314	return ecb_ctz32 (x >> shift) + shift;	490	return ecb_ctz32 (x >> shift) + shift;
		491	#endif
315	}	492	}
316		493
317	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	494	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
318	ecb_function_ int	495	ecb_function_ ecb_const int
319	ecb_popcount32 (uint32_t x)	496	ecb_popcount32 (uint32_t x)
320	{	497	{
321	x -= (x >> 1) & 0x55555555;	498	x -= (x >> 1) & 0x55555555;
322	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	499	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
323	x = ((x >> 4) + x) & 0x0f0f0f0f;	500	x = ((x >> 4) + x) & 0x0f0f0f0f;
324	x *= 0x01010101;	501	x *= 0x01010101;
325		502
326	return x >> 24;	503	return x >> 24;
327	}	504	}
328		505
329	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	506	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
330	ecb_function_ int ecb_ld32 (uint32_t x)	507	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
331	{	508	{
		509	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		510	unsigned long r;
		511	_BitScanReverse (&r, x);
		512	return (int)r;
		513	#else
332	int r = 0;	514	int r = 0;
333		515
334	if (x >> 16) { x >>= 16; r += 16; }	516	if (x >> 16) { x >>= 16; r += 16; }
335	if (x >> 8) { x >>= 8; r += 8; }	517	if (x >> 8) { x >>= 8; r += 8; }
336	if (x >> 4) { x >>= 4; r += 4; }	518	if (x >> 4) { x >>= 4; r += 4; }
337	if (x >> 2) { x >>= 2; r += 2; }	519	if (x >> 2) { x >>= 2; r += 2; }
338	if (x >> 1) { r += 1; }	520	if (x >> 1) { r += 1; }
339		521
340	return r;	522	return r;
		523	#endif
341	}	524	}
342		525
343	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	526	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
344	ecb_function_ int ecb_ld64 (uint64_t x)	527	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
345	{	528	{
		529	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		530	unsigned long r;
		531	_BitScanReverse64 (&r, x);
		532	return (int)r;
		533	#else
346	int r = 0;	534	int r = 0;
347		535
348	if (x >> 32) { x >>= 32; r += 32; }	536	if (x >> 32) { x >>= 32; r += 32; }
349		537
350	return r + ecb_ld32 (x);	538	return r + ecb_ld32 (x);
351	}
352	#endif	539	#endif
		540	}
		541	#endif
353		542
354	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	543	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
355	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	544	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
356	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	545	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
357	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	546	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
358		547
359	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	548	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
360	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	549	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
361	{	550	{
362	return ( (x * 0x0802U & 0x22110U)	551	return ( (x * 0x0802U & 0x22110U)
363	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	552	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
364	}	553	}
365		554
366	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	555	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
367	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	556	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
368	{	557	{
369	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	558	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
370	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	559	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
371	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	560	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
372	x = ( x >> 8 ) \| ( x << 8);	561	x = ( x >> 8 ) \| ( x << 8);
373		562
374	return x;	563	return x;
375	}	564	}
376		565
377	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	566	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
378	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	567	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
379	{	568	{
380	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	569	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
381	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	570	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
382	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	571	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
383	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	572	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
386	return x;	575	return x;
387	}	576	}
388		577
389	/* popcount64 is only available on 64 bit cpus as gcc builtin */	578	/* popcount64 is only available on 64 bit cpus as gcc builtin */
390	/* so for this version we are lazy */	579	/* so for this version we are lazy */
391	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	580	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
392	ecb_function_ int	581	ecb_function_ ecb_const int
393	ecb_popcount64 (uint64_t x)	582	ecb_popcount64 (uint64_t x)
394	{	583	{
395	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	584	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
396	}	585	}
397		586
398	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	587	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
399	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	588	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
400	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	589	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
401	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	590	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
402	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	591	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
403	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	592	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
404	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	593	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
405	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	594	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
406		595
407	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	596	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
408	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	597	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
409	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	598	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
410	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	599	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
411	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	600	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
412	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	601	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
413	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	602	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
414	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	603	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
415		604
416	#if ECB_GCC_VERSION(4,3)	605	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		606	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		607	#define ecb_bswap16(x) __builtin_bswap16 (x)
		608	#else
417	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	609	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		610	#endif
418	#define ecb_bswap32(x) __builtin_bswap32 (x)	611	#define ecb_bswap32(x) __builtin_bswap32 (x)
419	#define ecb_bswap64(x) __builtin_bswap64 (x)	612	#define ecb_bswap64(x) __builtin_bswap64 (x)
		613	#elif _MSC_VER
		614	#include <stdlib.h>
		615	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		616	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		617	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
420	#else	618	#else
421	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	619	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
422	ecb_function_ uint16_t	620	ecb_function_ ecb_const uint16_t
423	ecb_bswap16 (uint16_t x)	621	ecb_bswap16 (uint16_t x)
424	{	622	{
425	return ecb_rotl16 (x, 8);	623	return ecb_rotl16 (x, 8);
426	}	624	}
427		625
428	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	626	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
429	ecb_function_ uint32_t	627	ecb_function_ ecb_const uint32_t
430	ecb_bswap32 (uint32_t x)	628	ecb_bswap32 (uint32_t x)
431	{	629	{
432	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	630	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
433	}	631	}
434		632
435	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	633	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
436	ecb_function_ uint64_t	634	ecb_function_ ecb_const uint64_t
437	ecb_bswap64 (uint64_t x)	635	ecb_bswap64 (uint64_t x)
438	{	636	{
439	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	637	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
440	}	638	}
441	#endif	639	#endif
442		640
443	#if ECB_GCC_VERSION(4,5)	641	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
444	#define ecb_unreachable() __builtin_unreachable ()	642	#define ecb_unreachable() __builtin_unreachable ()
445	#else	643	#else
446	/* this seems to work fine, but gcc always emits a warning for it :/ */	644	/* this seems to work fine, but gcc always emits a warning for it :/ */
447	ecb_inline void ecb_unreachable (void) ecb_noreturn;	645	ecb_inline ecb_noreturn void ecb_unreachable (void);
448	ecb_inline void ecb_unreachable (void) { }	646	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
449	#endif	647	#endif
450		648
451	/* try to tell the compiler that some condition is definitely true */	649	/* try to tell the compiler that some condition is definitely true */
452	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	650	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
453		651
454	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	652	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
455	ecb_inline unsigned char	653	ecb_inline ecb_const uint32_t
456	ecb_byteorder_helper (void)	654	ecb_byteorder_helper (void)
457	{	655	{
458	const uint32_t u = 0x11223344;	656	/* the union code still generates code under pressure in gcc, */
459	return (unsigned char )&u;	657	/* but less than using pointers, and always seems to */
		658	/* successfully return a constant. */
		659	/* the reason why we have this horrible preprocessor mess */
		660	/* is to avoid it in all cases, at least on common architectures */
		661	/* or when using a recent enough gcc version (>= 4.6) */
		662	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		663	\|\| ((__i386 \|\| __i386__ \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64) && !__VOS__)
		664	#define ECB_LITTLE_ENDIAN 1
		665	return 0x44332211;
		666	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		667	\|\| ((__AARCH64EB__ \|\| __MIPSEB__ \|\| __ARMEB__) && !__VOS__)
		668	#define ECB_BIG_ENDIAN 1
		669	return 0x11223344;
		670	#else
		671	union
		672	{
		673	uint8_t c[4];
		674	uint32_t u;
		675	} u = { 0x11, 0x22, 0x33, 0x44 };
		676	return u.u;
		677	#endif
460	}	678	}
461		679
462	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	680	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
463	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	681	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
464	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	682	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
465	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	683	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
466		684
467	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	685	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
468	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	686	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
469	#else	687	#else
470	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	688	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
471	#endif	689	#endif
472		690
473	#if __cplusplus	691	#if ECB_CPP
474	template<typename T>	692	template<typename T>
475	static inline T ecb_div_rd (T val, T div)	693	static inline T ecb_div_rd (T val, T div)
476	{	694	{
477	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	695	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
478	}	696	}
…		…
495	}	713	}
496	#else	714	#else
497	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	715	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
498	#endif	716	#endif
499		717
		718	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		719	ecb_function_ ecb_const uint32_t
		720	ecb_binary16_to_binary32 (uint32_t x)
		721	{
		722	unsigned int s = (x & 0x8000) << (31 - 15);
		723	int e = (x >> 10) & 0x001f;
		724	unsigned int m = x & 0x03ff;
		725
		726	if (ecb_expect_false (e == 31))
		727	/* infinity or NaN */
		728	e = 255 - (127 - 15);
		729	else if (ecb_expect_false (!e))
		730	{
		731	if (ecb_expect_true (!m))
		732	/* zero, handled by code below by forcing e to 0 */
		733	e = 0 - (127 - 15);
		734	else
		735	{
		736	/* subnormal, renormalise */
		737	unsigned int s = 10 - ecb_ld32 (m);
		738
		739	m = (m << s) & 0x3ff; /* mask implicit bit */
		740	e -= s - 1;
		741	}
		742	}
		743
		744	/* e and m now are normalised, or zero, (or inf or nan) */
		745	e += 127 - 15;
		746
		747	return s \| (e << 23) \| (m << (23 - 10));
		748	}
		749
		750	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		751	ecb_function_ ecb_const uint16_t
		752	ecb_binary32_to_binary16 (uint32_t x)
		753	{
		754	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		755	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		756	unsigned int m = x & 0x007fffff;
		757
		758	x &= 0x7fffffff;
		759
		760	/* if it's within range of binary16 normals, use fast path */
		761	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		762	{
		763	/* mantissa round-to-even */
		764	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		765
		766	/* handle overflow */
		767	if (ecb_expect_false (m >= 0x00800000))
		768	{
		769	m >>= 1;
		770	e += 1;
		771	}
		772
		773	return s \| (e << 10) \| (m >> (23 - 10));
		774	}
		775
		776	/* handle large numbers and infinity */
		777	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		778	return s \| 0x7c00;
		779
		780	/* handle zero, subnormals and small numbers */
		781	if (ecb_expect_true (x < 0x38800000))
		782	{
		783	/* zero */
		784	if (ecb_expect_true (!x))
		785	return s;
		786
		787	/* handle subnormals */
		788
		789	/* too small, will be zero */
		790	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		791	return s;
		792
		793	m \|= 0x00800000; /* make implicit bit explicit */
		794
		795	/* very tricky - we need to round to the nearest e (+10) bit value */
		796	{
		797	unsigned int bits = 14 - e;
		798	unsigned int half = (1 << (bits - 1)) - 1;
		799	unsigned int even = (m >> bits) & 1;
		800
		801	/* if this overflows, we will end up with a normalised number */
		802	m = (m + half + even) >> bits;
		803	}
		804
		805	return s \| m;
		806	}
		807
		808	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		809	m >>= 13;
		810
		811	return s \| 0x7c00 \| m \| !m;
		812	}
		813
		814	/*******************************************************************************/
		815	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		816
		817	/* basically, everything uses "ieee pure-endian" floating point numbers */
		818	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		819	#if 0 \
		820	\|\| __i386 \|\| __i386__ \
		821	\|\| ECB_GCC_AMD64 \
		822	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		823	\|\| defined __s390__ \|\| defined __s390x__ \
		824	\|\| defined __mips__ \
		825	\|\| defined __alpha__ \
		826	\|\| defined __hppa__ \
		827	\|\| defined __ia64__ \
		828	\|\| defined __m68k__ \
		829	\|\| defined __m88k__ \
		830	\|\| defined __sh__ \
		831	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		832	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		833	\|\| defined __aarch64__
		834	#define ECB_STDFP 1
		835	#include <string.h> /* for memcpy */
		836	#else
		837	#define ECB_STDFP 0
		838	#endif
		839
		840	#ifndef ECB_NO_LIBM
		841
		842	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		843
		844	/* only the oldest of old doesn't have this one. solaris. */
		845	#ifdef INFINITY
		846	#define ECB_INFINITY INFINITY
		847	#else
		848	#define ECB_INFINITY HUGE_VAL
500	#endif	849	#endif
501		850
		851	#ifdef NAN
		852	#define ECB_NAN NAN
		853	#else
		854	#define ECB_NAN ECB_INFINITY
		855	#endif
		856
		857	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		858	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		859	#define ecb_frexpf(x,e) frexpf ((x), (e))
		860	#else
		861	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		862	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		863	#endif
		864
		865	/* convert a float to ieee single/binary32 */
		866	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		867	ecb_function_ ecb_const uint32_t
		868	ecb_float_to_binary32 (float x)
		869	{
		870	uint32_t r;
		871
		872	#if ECB_STDFP
		873	memcpy (&r, &x, 4);
		874	#else
		875	/* slow emulation, works for anything but -0 */
		876	uint32_t m;
		877	int e;
		878
		879	if (x == 0e0f ) return 0x00000000U;
		880	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		881	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		882	if (x != x ) return 0x7fbfffffU;
		883
		884	m = ecb_frexpf (x, &e) * 0x1000000U;
		885
		886	r = m & 0x80000000U;
		887
		888	if (r)
		889	m = -m;
		890
		891	if (e <= -126)
		892	{
		893	m &= 0xffffffU;
		894	m >>= (-125 - e);
		895	e = -126;
		896	}
		897
		898	r \|= (e + 126) << 23;
		899	r \|= m & 0x7fffffU;
		900	#endif
		901
		902	return r;
		903	}
		904
		905	/* converts an ieee single/binary32 to a float */
		906	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		907	ecb_function_ ecb_const float
		908	ecb_binary32_to_float (uint32_t x)
		909	{
		910	float r;
		911
		912	#if ECB_STDFP
		913	memcpy (&r, &x, 4);
		914	#else
		915	/* emulation, only works for normals and subnormals and +0 */
		916	int neg = x >> 31;
		917	int e = (x >> 23) & 0xffU;
		918
		919	x &= 0x7fffffU;
		920
		921	if (e)
		922	x \|= 0x800000U;
		923	else
		924	e = 1;
		925
		926	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		927	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		928
		929	r = neg ? -r : r;
		930	#endif
		931
		932	return r;
		933	}
		934
		935	/* convert a double to ieee double/binary64 */
		936	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		937	ecb_function_ ecb_const uint64_t
		938	ecb_double_to_binary64 (double x)
		939	{
		940	uint64_t r;
		941
		942	#if ECB_STDFP
		943	memcpy (&r, &x, 8);
		944	#else
		945	/* slow emulation, works for anything but -0 */
		946	uint64_t m;
		947	int e;
		948
		949	if (x == 0e0 ) return 0x0000000000000000U;
		950	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		951	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		952	if (x != x ) return 0X7ff7ffffffffffffU;
		953
		954	m = frexp (x, &e) * 0x20000000000000U;
		955
		956	r = m & 0x8000000000000000;;
		957
		958	if (r)
		959	m = -m;
		960
		961	if (e <= -1022)
		962	{
		963	m &= 0x1fffffffffffffU;
		964	m >>= (-1021 - e);
		965	e = -1022;
		966	}
		967
		968	r \|= ((uint64_t)(e + 1022)) << 52;
		969	r \|= m & 0xfffffffffffffU;
		970	#endif
		971
		972	return r;
		973	}
		974
		975	/* converts an ieee double/binary64 to a double */
		976	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		977	ecb_function_ ecb_const double
		978	ecb_binary64_to_double (uint64_t x)
		979	{
		980	double r;
		981
		982	#if ECB_STDFP
		983	memcpy (&r, &x, 8);
		984	#else
		985	/* emulation, only works for normals and subnormals and +0 */
		986	int neg = x >> 63;
		987	int e = (x >> 52) & 0x7ffU;
		988
		989	x &= 0xfffffffffffffU;
		990
		991	if (e)
		992	x \|= 0x10000000000000U;
		993	else
		994	e = 1;
		995
		996	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		997	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		998
		999	r = neg ? -r : r;
		1000	#endif
		1001
		1002	return r;
		1003	}
		1004
		1005	/* convert a float to ieee half/binary16 */
		1006	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1007	ecb_function_ ecb_const uint16_t
		1008	ecb_float_to_binary16 (float x)
		1009	{
		1010	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1011	}
		1012
		1013	/* convert an ieee half/binary16 to float */
		1014	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1015	ecb_function_ ecb_const float
		1016	ecb_binary16_to_float (uint16_t x)
		1017	{
		1018	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1019	}
		1020
		1021	#endif
		1022
		1023	#endif
		1024

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Comparing libecb/ecb.h (file contents): Revision 1.91 by root, Tue May 29 14:30:44 2012 UTC vs. Revision 1.179 by root, Sat Dec 28 08:01:05 2019 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.91 by root, Tue May 29 14:30:44 2012 UTC vs.
Revision 1.179 by root, Sat Dec 28 08:01:05 2019 UTC