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

Comparing libeio/ecb.h (file contents):
Revision 1.14 by root, Sun Jun 17 17:07:25 2012 UTC vs.
Revision 1.25 by root, Thu Jun 25 15:59:57 2015 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 0x00010004
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 UINTMAX_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	/* work around x32 idiocy by defining proper macros */
		83	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		84	#if _ILP32
		85	#define ECB_AMD64_X32 1
		86	#else
		87	#define ECB_AMD64 1
66	#endif	88	#endif
67	#endif	89	#endif
68		90
69	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
70	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
71	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
72	* or so.	94	* or so.
73	* we try to detect these and simply assume they are not gcc - if they have	95	* we try to detect these and simply assume they are not gcc - if they have
74	* an issue with that they should have done it right in the first place.	96	* an issue with that they should have done it right in the first place.
75	*/	97	*/
76	#ifndef ECB_GCC_VERSION
77	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	98	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
78	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
79	#else	100	#else
80	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	101	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
81	#endif	102	#endif
82	#endif
83		103
84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	104	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	106	#if __clang__ && defined __has_builtin
		107	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		108	#else
		109	#define ECB_CLANG_BUILTIN(x) 0
		110	#endif
		111
		112	#if __clang__ && defined __has_extension
		113	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		114	#else
		115	#define ECB_CLANG_EXTENSION(x) 0
		116	#endif
		117
87	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
88	#define ECB_CPP11 (__cplusplus >= 201103L)	119	#define ECB_CPP11 (__cplusplus >= 201103L)
89		120
		121	#if ECB_CPP
		122	#define ECB_C 0
		123	#define ECB_STDC_VERSION 0
		124	#else
		125	#define ECB_C 1
		126	#define ECB_STDC_VERSION __STDC_VERSION__
		127	#endif
		128
		129	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		130	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		131
		132	#if ECB_CPP
		133	#define ECB_EXTERN_C extern "C"
		134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		135	#define ECB_EXTERN_C_END }
		136	#else
		137	#define ECB_EXTERN_C extern
		138	#define ECB_EXTERN_C_BEG
		139	#define ECB_EXTERN_C_END
		140	#endif
		141
90	/*****************************************************************************/	142	/*****************************************************************************/
91		143
92	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	144	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
93	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	145	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
94		146
…		…
96	#define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
97	#endif	149	#endif
98		150
99	#if ECB_NO_SMP	151	#if ECB_NO_SMP
100	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
		153	#endif
		154
		155	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		156	#if __xlC__ && ECB_CPP
		157	#include <builtins.h>
101	#endif	158	#endif
102		159
103	#ifndef ECB_MEMORY_FENCE	160	#ifndef ECB_MEMORY_FENCE
104	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	161	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
105	#if __i386 \|\| __i386__	162	#if __i386 \|\| __i386__
106	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	163	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
107	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	164	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
108	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	165	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
109	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	166	#elif ECB_GCC_AMD64
110	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
111	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
112	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
113	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	170	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
114	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
…		…
116	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	173	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
117	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	174	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
118	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	175	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
119	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	176	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
120	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		178	#elif __aarch64__
		179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
121	#elif __sparc \|\| __sparc__	180	#elif (__sparc \|\| __sparc__) && !__sparcv8
122	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	181	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
123	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	182	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
124	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	183	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
125	#elif defined __s390__ \|\| defined __s390x__	184	#elif defined __s390__ \|\| defined __s390x__
126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
127	#elif defined __mips__	186	#elif defined __mips__
		187	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		188	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	189	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
129	#elif defined __alpha__	190	#elif defined __alpha__
130	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	191	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
131	#elif defined __hppa__	192	#elif defined __hppa__
132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")	193	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
133	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	194	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
134	#elif defined __ia64__	195	#elif defined __ia64__
135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")	196	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		197	#elif defined __m68k__
		198	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		199	#elif defined __m88k__
		200	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		201	#elif defined __sh__
		202	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
136	#endif	203	#endif
137	#endif	204	#endif
138	#endif	205	#endif
139		206
140	#ifndef ECB_MEMORY_FENCE	207	#ifndef ECB_MEMORY_FENCE
141	#if ECB_GCC_VERSION(4,7)	208	#if ECB_GCC_VERSION(4,7)
142	/* see comment below (stdatomic.h) about the C11 memory model. */	209	/* see comment below (stdatomic.h) about the C11 memory model. */
143	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	210	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
144	#elif defined __clang && __has_feature (cxx_atomic)	211	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		212	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		213
		214	#elif ECB_CLANG_EXTENSION(c_atomic)
145	/* see comment below (stdatomic.h) about the C11 memory model. */	215	/* see comment below (stdatomic.h) about the C11 memory model. */
146	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	216	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		217	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		218	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		219
147	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	220	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
148	#define ECB_MEMORY_FENCE __sync_synchronize ()	221	#define ECB_MEMORY_FENCE __sync_synchronize ()
		222	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		223	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		224	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		225	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		226	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		227	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
149	#elif _MSC_VER >= 1400 /* VC++ 2005 */	228	#elif _MSC_VER >= 1400 /* VC++ 2005 */
150	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	229	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
151	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	230	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
152	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	231	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
153	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	232	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
173	/* any fence other than seq_cst, which isn't very efficient for us. */	252	/* any fence other than seq_cst, which isn't very efficient for us. */
174	/* Why that is, we don't know - either the C11 memory model is quite useless */	253	/* Why that is, we don't know - either the C11 memory model is quite useless */
175	/* for most usages, or gcc and clang have a bug */	254	/* for most usages, or gcc and clang have a bug */
176	/* I currently lean towards the latter, and inefficiently implement */	255	/* I currently lean towards the latter, and inefficiently implement */
177	/* all three of ecb's fences as a seq_cst fence */	256	/* all three of ecb's fences as a seq_cst fence */
		257	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		258	/* for all __atomic_thread_fence's except seq_cst */
178	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	259	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
179	#endif	260	#endif
180	#endif	261	#endif
181		262
182	#ifndef ECB_MEMORY_FENCE	263	#ifndef ECB_MEMORY_FENCE
…		…
205	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	286	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
206	#endif	287	#endif
207		288
208	/*****************************************************************************/	289	/*****************************************************************************/
209		290
210	#if __cplusplus	291	#if ECB_CPP
211	#define ecb_inline static inline	292	#define ecb_inline static inline
212	#elif ECB_GCC_VERSION(2,5)	293	#elif ECB_GCC_VERSION(2,5)
213	#define ecb_inline static __inline__	294	#define ecb_inline static __inline__
214	#elif ECB_C99	295	#elif ECB_C99
215	#define ecb_inline static inline	296	#define ecb_inline static inline
…		…
229		310
230	#define ECB_CONCAT_(a, b) a ## b	311	#define ECB_CONCAT_(a, b) a ## b
231	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	312	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
232	#define ECB_STRINGIFY_(a) # a	313	#define ECB_STRINGIFY_(a) # a
233	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	314	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		315	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
234		316
235	#define ecb_function_ ecb_inline	317	#define ecb_function_ ecb_inline
236		318
237	#if ECB_GCC_VERSION(3,1)	319	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
238	#define ecb_attribute(attrlist) __attribute__(attrlist)	320	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		321	#else
		322	#define ecb_attribute(attrlist)
		323	#endif
		324
		325	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
239	#define ecb_is_constant(expr) __builtin_constant_p (expr)	326	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		327	#else
		328	/* possible C11 impl for integral types
		329	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		330	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		331
		332	#define ecb_is_constant(expr) 0
		333	#endif
		334
		335	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
240	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	336	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		337	#else
		338	#define ecb_expect(expr,value) (expr)
		339	#endif
		340
		341	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
241	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	342	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
242	#else	343	#else
243	#define ecb_attribute(attrlist)
244	#define ecb_is_constant(expr) 0
245	#define ecb_expect(expr,value) (expr)
246	#define ecb_prefetch(addr,rw,locality)	344	#define ecb_prefetch(addr,rw,locality)
247	#endif	345	#endif
248		346
249	/* no emulation for ecb_decltype */	347	/* no emulation for ecb_decltype */
250	#if ECB_GCC_VERSION(4,5)	348	#if ECB_CPP11
		349	// older implementations might have problems with decltype(x)::type, work around it
		350	template<class T> struct ecb_decltype_t { typedef T type; };
251	#define ecb_decltype(x) __decltype(x)	351	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
252	#elif ECB_GCC_VERSION(3,0)	352	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
253	#define ecb_decltype(x) __typeof(x)	353	#define ecb_decltype(x) __typeof__ (x)
254	#endif	354	#endif
255		355
		356	#if _MSC_VER >= 1300
		357	#define ecb_deprecated __declspec (deprecated)
		358	#else
		359	#define ecb_deprecated ecb_attribute ((__deprecated__))
		360	#endif
		361
		362	#if _MSC_VER >= 1500
		363	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		364	#elif ECB_GCC_VERSION(4,5)
		365	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		366	#else
		367	#define ecb_deprecated_message(msg) ecb_deprecated
		368	#endif
		369
		370	#if _MSC_VER >= 1400
		371	#define ecb_noinline __declspec (noinline)
		372	#else
256	#define ecb_noinline ecb_attribute ((__noinline__))	373	#define ecb_noinline ecb_attribute ((__noinline__))
		374	#endif
		375
257	#define ecb_unused ecb_attribute ((__unused__))	376	#define ecb_unused ecb_attribute ((__unused__))
258	#define ecb_const ecb_attribute ((__const__))	377	#define ecb_const ecb_attribute ((__const__))
259	#define ecb_pure ecb_attribute ((__pure__))	378	#define ecb_pure ecb_attribute ((__pure__))
260		379
261	#if ECB_C11	380	#if ECB_C11 \|\| __IBMC_NORETURN
		381	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
262	#define ecb_noreturn _Noreturn	382	#define ecb_noreturn _Noreturn
		383	#elif ECB_CPP11
		384	#define ecb_noreturn [[noreturn]]
		385	#elif _MSC_VER >= 1200
		386	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		387	#define ecb_noreturn __declspec (noreturn)
263	#else	388	#else
264	#define ecb_noreturn ecb_attribute ((__noreturn__))	389	#define ecb_noreturn ecb_attribute ((__noreturn__))
265	#endif	390	#endif
266		391
267	#if ECB_GCC_VERSION(4,3)	392	#if ECB_GCC_VERSION(4,3)
…		…
282	/* for compatibility to the rest of the world */	407	/* for compatibility to the rest of the world */
283	#define ecb_likely(expr) ecb_expect_true (expr)	408	#define ecb_likely(expr) ecb_expect_true (expr)
284	#define ecb_unlikely(expr) ecb_expect_false (expr)	409	#define ecb_unlikely(expr) ecb_expect_false (expr)
285		410
286	/* count trailing zero bits and count # of one bits */	411	/* count trailing zero bits and count # of one bits */
287	#if ECB_GCC_VERSION(3,4)	412	#if ECB_GCC_VERSION(3,4) \
		413	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		414	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		415	&& ECB_CLANG_BUILTIN(__builtin_popcount))
288	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	416	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
289	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	417	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
290	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	418	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
291	#define ecb_ctz32(x) __builtin_ctz (x)	419	#define ecb_ctz32(x) __builtin_ctz (x)
292	#define ecb_ctz64(x) __builtin_ctzll (x)	420	#define ecb_ctz64(x) __builtin_ctzll (x)
293	#define ecb_popcount32(x) __builtin_popcount (x)	421	#define ecb_popcount32(x) __builtin_popcount (x)
294	/* no popcountll */	422	/* no popcountll */
295	#else	423	#else
296	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	424	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
297	ecb_function_ int	425	ecb_function_ ecb_const int
298	ecb_ctz32 (uint32_t x)	426	ecb_ctz32 (uint32_t x)
299	{	427	{
300	int r = 0;	428	int r = 0;
301		429
302	x &= ~x + 1; /* this isolates the lowest bit */	430	x &= ~x + 1; /* this isolates the lowest bit */
…		…
316	#endif	444	#endif
317		445
318	return r;	446	return r;
319	}	447	}
320		448
321	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
322	ecb_function_ int	450	ecb_function_ ecb_const int
323	ecb_ctz64 (uint64_t x)	451	ecb_ctz64 (uint64_t x)
324	{	452	{
325	int shift = x & 0xffffffffU ? 0 : 32;	453	int shift = x & 0xffffffffU ? 0 : 32;
326	return ecb_ctz32 (x >> shift) + shift;	454	return ecb_ctz32 (x >> shift) + shift;
327	}	455	}
328		456
329	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
330	ecb_function_ int	458	ecb_function_ ecb_const int
331	ecb_popcount32 (uint32_t x)	459	ecb_popcount32 (uint32_t x)
332	{	460	{
333	x -= (x >> 1) & 0x55555555;	461	x -= (x >> 1) & 0x55555555;
334	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	462	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
335	x = ((x >> 4) + x) & 0x0f0f0f0f;	463	x = ((x >> 4) + x) & 0x0f0f0f0f;
336	x *= 0x01010101;	464	x *= 0x01010101;
337		465
338	return x >> 24;	466	return x >> 24;
339	}	467	}
340		468
341	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	469	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
342	ecb_function_ int ecb_ld32 (uint32_t x)	470	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
343	{	471	{
344	int r = 0;	472	int r = 0;
345		473
346	if (x >> 16) { x >>= 16; r += 16; }	474	if (x >> 16) { x >>= 16; r += 16; }
347	if (x >> 8) { x >>= 8; r += 8; }	475	if (x >> 8) { x >>= 8; r += 8; }
…		…
350	if (x >> 1) { r += 1; }	478	if (x >> 1) { r += 1; }
351		479
352	return r;	480	return r;
353	}	481	}
354		482
355	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	483	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
356	ecb_function_ int ecb_ld64 (uint64_t x)	484	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
357	{	485	{
358	int r = 0;	486	int r = 0;
359		487
360	if (x >> 32) { x >>= 32; r += 32; }	488	if (x >> 32) { x >>= 32; r += 32; }
361		489
362	return r + ecb_ld32 (x);	490	return r + ecb_ld32 (x);
363	}	491	}
364	#endif	492	#endif
365		493
366	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	494	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
367	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	495	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
368	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	496	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
369	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	497	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
370		498
371	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	499	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
372	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	500	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
373	{	501	{
374	return ( (x * 0x0802U & 0x22110U)	502	return ( (x * 0x0802U & 0x22110U)
375	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	503	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
376	}	504	}
377		505
378	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	506	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
379	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	507	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
380	{	508	{
381	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	509	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
382	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	510	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
383	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	511	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
384	x = ( x >> 8 ) \| ( x << 8);	512	x = ( x >> 8 ) \| ( x << 8);
385		513
386	return x;	514	return x;
387	}	515	}
388		516
389	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	517	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
390	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	518	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
391	{	519	{
392	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	520	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
393	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	521	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
394	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	522	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
395	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	523	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
398	return x;	526	return x;
399	}	527	}
400		528
401	/* popcount64 is only available on 64 bit cpus as gcc builtin */	529	/* popcount64 is only available on 64 bit cpus as gcc builtin */
402	/* so for this version we are lazy */	530	/* so for this version we are lazy */
403	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	531	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
404	ecb_function_ int	532	ecb_function_ ecb_const int
405	ecb_popcount64 (uint64_t x)	533	ecb_popcount64 (uint64_t x)
406	{	534	{
407	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	535	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
408	}	536	}
409		537
410	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	538	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
411	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	539	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
412	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	540	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
413	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	541	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
414	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	542	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
415	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	543	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
416	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	544	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
417	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	545	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
418		546
419	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	547	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
420	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	548	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
421	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	549	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
422	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	550	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
423	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	551	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
424	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	552	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
425	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	553	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
426	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	554	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
427		555
428	#if ECB_GCC_VERSION(4,3)	556	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		557	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		558	#define ecb_bswap16(x) __builtin_bswap16 (x)
		559	#else
429	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	560	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		561	#endif
430	#define ecb_bswap32(x) __builtin_bswap32 (x)	562	#define ecb_bswap32(x) __builtin_bswap32 (x)
431	#define ecb_bswap64(x) __builtin_bswap64 (x)	563	#define ecb_bswap64(x) __builtin_bswap64 (x)
		564	#elif _MSC_VER
		565	#include <stdlib.h>
		566	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		567	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		568	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
432	#else	569	#else
433	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	570	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
434	ecb_function_ uint16_t	571	ecb_function_ ecb_const uint16_t
435	ecb_bswap16 (uint16_t x)	572	ecb_bswap16 (uint16_t x)
436	{	573	{
437	return ecb_rotl16 (x, 8);	574	return ecb_rotl16 (x, 8);
438	}	575	}
439		576
440	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	577	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
441	ecb_function_ uint32_t	578	ecb_function_ ecb_const uint32_t
442	ecb_bswap32 (uint32_t x)	579	ecb_bswap32 (uint32_t x)
443	{	580	{
444	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	581	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
445	}	582	}
446		583
447	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	584	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
448	ecb_function_ uint64_t	585	ecb_function_ ecb_const uint64_t
449	ecb_bswap64 (uint64_t x)	586	ecb_bswap64 (uint64_t x)
450	{	587	{
451	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	588	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
452	}	589	}
453	#endif	590	#endif
454		591
455	#if ECB_GCC_VERSION(4,5)	592	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
456	#define ecb_unreachable() __builtin_unreachable ()	593	#define ecb_unreachable() __builtin_unreachable ()
457	#else	594	#else
458	/* this seems to work fine, but gcc always emits a warning for it :/ */	595	/* this seems to work fine, but gcc always emits a warning for it :/ */
459	ecb_inline void ecb_unreachable (void) ecb_noreturn;	596	ecb_inline ecb_noreturn void ecb_unreachable (void);
460	ecb_inline void ecb_unreachable (void) { }	597	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
461	#endif	598	#endif
462		599
463	/* try to tell the compiler that some condition is definitely true */	600	/* try to tell the compiler that some condition is definitely true */
464	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	601	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
465		602
466	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	603	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
467	ecb_inline unsigned char	604	ecb_inline ecb_const unsigned char
468	ecb_byteorder_helper (void)	605	ecb_byteorder_helper (void)
469	{	606	{
470	/* the union code still generates code under pressure in gcc, */	607	/* the union code still generates code under pressure in gcc, */
471	/* but less than using pointers, and always seem to */	608	/* but less than using pointers, and always seems to */
472	/* successfully return a constant. */	609	/* successfully return a constant. */
473	/* the reason why we have this horrible preprocessor mess */	610	/* the reason why we have this horrible preprocessor mess */
474	/* is to avoid it in all cases, at least on common architectures */	611	/* is to avoid it in all cases, at least on common architectures */
475	/* and yes, gcc defines __BYTE_ORDER__, g++ does not */	612	/* or when using a recent enough gcc version (>= 4.6) */
476	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	613	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
477	return 0x44;	614	return 0x44;
478	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	615	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
479	return 0x44;	616	return 0x44;
480	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	617	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
481	retrurn 0x11;	618	return 0x11;
482	#else	619	#else
483	union	620	union
484	{	621	{
485	uint32_t i;	622	uint32_t i;
486	uint8_t c;	623	uint8_t c;
487	} u = { 0x11223344 };	624	} u = { 0x11223344 };
488	return u.c;	625	return u.c;
489	#endif	626	#endif
490	}	627	}
491		628
492	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	629	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
493	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	630	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
494	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	631	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
495	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	632	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
496		633
497	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	634	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
498	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	635	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
499	#else	636	#else
500	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	637	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
501	#endif	638	#endif
502		639
503	#if __cplusplus	640	#if ECB_CPP
504	template<typename T>	641	template<typename T>
505	static inline T ecb_div_rd (T val, T div)	642	static inline T ecb_div_rd (T val, T div)
506	{	643	{
507	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	644	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
508	}	645	}
…		…
525	}	662	}
526	#else	663	#else
527	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	664	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
528	#endif	665	#endif
529		666
		667	/*******************************************************************************/
		668	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		669
		670	/* basically, everything uses "ieee pure-endian" floating point numbers */
		671	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		672	#if 0 \
		673	\|\| __i386 \|\| __i386__ \
		674	\|\| ECB_GCC_AMD64 \
		675	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		676	\|\| defined __s390__ \|\| defined __s390x__ \
		677	\|\| defined __mips__ \
		678	\|\| defined __alpha__ \
		679	\|\| defined __hppa__ \
		680	\|\| defined __ia64__ \
		681	\|\| defined __m68k__ \
		682	\|\| defined __m88k__ \
		683	\|\| defined __sh__ \
		684	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		685	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		686	\|\| defined __aarch64__
		687	#define ECB_STDFP 1
		688	#include <string.h> /* for memcpy */
		689	#else
		690	#define ECB_STDFP 0
		691	#endif
		692
		693	#ifndef ECB_NO_LIBM
		694
		695	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		696
		697	/* only the oldest of old doesn't have this one. solaris. */
		698	#ifdef INFINITY
		699	#define ECB_INFINITY INFINITY
		700	#else
		701	#define ECB_INFINITY HUGE_VAL
530	#endif	702	#endif
531		703
		704	#ifdef NAN
		705	#define ECB_NAN NAN
		706	#else
		707	#define ECB_NAN ECB_INFINITY
		708	#endif
		709
		710	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		711	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		712	#define ecb_frexpf(x,e) frexpf ((x), (e))
		713	#else
		714	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		715	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		716	#endif
		717
		718	/* converts an ieee half/binary16 to a float */
		719	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		720	ecb_function_ ecb_const float
		721	ecb_binary16_to_float (uint16_t x)
		722	{
		723	int e = (x >> 10) & 0x1f;
		724	int m = x & 0x3ff;
		725	float r;
		726
		727	if (!e ) r = ecb_ldexpf (m , -24);
		728	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
		729	else if (m ) r = ECB_NAN;
		730	else r = ECB_INFINITY;
		731
		732	return x & 0x8000 ? -r : r;
		733	}
		734
		735	/* convert a float to ieee single/binary32 */
		736	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		737	ecb_function_ ecb_const uint32_t
		738	ecb_float_to_binary32 (float x)
		739	{
		740	uint32_t r;
		741
		742	#if ECB_STDFP
		743	memcpy (&r, &x, 4);
		744	#else
		745	/* slow emulation, works for anything but -0 */
		746	uint32_t m;
		747	int e;
		748
		749	if (x == 0e0f ) return 0x00000000U;
		750	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		751	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		752	if (x != x ) return 0x7fbfffffU;
		753
		754	m = ecb_frexpf (x, &e) * 0x1000000U;
		755
		756	r = m & 0x80000000U;
		757
		758	if (r)
		759	m = -m;
		760
		761	if (e <= -126)
		762	{
		763	m &= 0xffffffU;
		764	m >>= (-125 - e);
		765	e = -126;
		766	}
		767
		768	r \|= (e + 126) << 23;
		769	r \|= m & 0x7fffffU;
		770	#endif
		771
		772	return r;
		773	}
		774
		775	/* converts an ieee single/binary32 to a float */
		776	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		777	ecb_function_ ecb_const float
		778	ecb_binary32_to_float (uint32_t x)
		779	{
		780	float r;
		781
		782	#if ECB_STDFP
		783	memcpy (&r, &x, 4);
		784	#else
		785	/* emulation, only works for normals and subnormals and +0 */
		786	int neg = x >> 31;
		787	int e = (x >> 23) & 0xffU;
		788
		789	x &= 0x7fffffU;
		790
		791	if (e)
		792	x \|= 0x800000U;
		793	else
		794	e = 1;
		795
		796	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		797	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		798
		799	r = neg ? -r : r;
		800	#endif
		801
		802	return r;
		803	}
		804
		805	/* convert a double to ieee double/binary64 */
		806	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		807	ecb_function_ ecb_const uint64_t
		808	ecb_double_to_binary64 (double x)
		809	{
		810	uint64_t r;
		811
		812	#if ECB_STDFP
		813	memcpy (&r, &x, 8);
		814	#else
		815	/* slow emulation, works for anything but -0 */
		816	uint64_t m;
		817	int e;
		818
		819	if (x == 0e0 ) return 0x0000000000000000U;
		820	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		821	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		822	if (x != x ) return 0X7ff7ffffffffffffU;
		823
		824	m = frexp (x, &e) * 0x20000000000000U;
		825
		826	r = m & 0x8000000000000000;;
		827
		828	if (r)
		829	m = -m;
		830
		831	if (e <= -1022)
		832	{
		833	m &= 0x1fffffffffffffU;
		834	m >>= (-1021 - e);
		835	e = -1022;
		836	}
		837
		838	r \|= ((uint64_t)(e + 1022)) << 52;
		839	r \|= m & 0xfffffffffffffU;
		840	#endif
		841
		842	return r;
		843	}
		844
		845	/* converts an ieee double/binary64 to a double */
		846	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		847	ecb_function_ ecb_const double
		848	ecb_binary64_to_double (uint64_t x)
		849	{
		850	double r;
		851
		852	#if ECB_STDFP
		853	memcpy (&r, &x, 8);
		854	#else
		855	/* emulation, only works for normals and subnormals and +0 */
		856	int neg = x >> 63;
		857	int e = (x >> 52) & 0x7ffU;
		858
		859	x &= 0xfffffffffffffU;
		860
		861	if (e)
		862	x \|= 0x10000000000000U;
		863	else
		864	e = 1;
		865
		866	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		867	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		868
		869	r = neg ? -r : r;
		870	#endif
		871
		872	return r;
		873	}
		874
		875	#endif
		876
		877	#endif
		878

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Comparing libeio/ecb.h (file contents): Revision 1.14 by root, Sun Jun 17 17:07:25 2012 UTC vs. Revision 1.25 by root, Thu Jun 25 15:59:57 2015 UTC

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Comparing libeio/ecb.h (file contents):
Revision 1.14 by root, Sun Jun 17 17:07:25 2012 UTC vs.
Revision 1.25 by root, Thu Jun 25 15:59:57 2015 UTC