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

Comparing libeio/ecb.h (file contents):
Revision 1.15 by root, Wed Jul 25 16:12:28 2012 UTC vs.
Revision 1.26 by root, Mon Sep 21 08:01:00 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 0x00010002	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;
…		…
63	#else	74	#else
64	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
65	#endif	76	#endif
66	#endif	77	#endif
67		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
		88	#endif
		89	#endif
		90
68	/* many compilers define _GNUC_ to some versions but then only implement	91	/* many compilers define _GNUC_ to some versions but then only implement
69	* what their idiot authors think are the "more important" extensions,	92	* what their idiot authors think are the "more important" extensions,
70	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
71	* or so.	94	* or so.
72	* 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
73	* 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.
74	*/	97	*/
75	#ifndef ECB_GCC_VERSION
76	#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__
77	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
78	#else	100	#else
79	#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)))
80	#endif	102	#endif
81	#endif
82		103
83	#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)))
84	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
85	#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
86	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
87	#define ECB_CPP11 (__cplusplus >= 201103L)	119	#define ECB_CPP11 (__cplusplus >= 201103L)
		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)
88		131
89	#if ECB_CPP	132	#if ECB_CPP
90	#define ECB_EXTERN_C extern "C"	133	#define ECB_EXTERN_C extern "C"
91	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
92	#define ECB_EXTERN_C_END }	135	#define ECB_EXTERN_C_END }
…		…
105	#define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
106	#endif	149	#endif
107		150
108	#if ECB_NO_SMP	151	#if ECB_NO_SMP
109	#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>
110	#endif	158	#endif
111		159
112	#ifndef ECB_MEMORY_FENCE	160	#ifndef ECB_MEMORY_FENCE
113	#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
114	#if __i386 \|\| __i386__	162	#if __i386 \|\| __i386__
115	#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")
116	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	164	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
117	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	165	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
118	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	166	#elif ECB_GCC_AMD64
119	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
120	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
121	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
122	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	170	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
123	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
…		…
125	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	173	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
126	#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")
127	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	175	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
128	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	176	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
129	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
130	#elif __sparc \|\| __sparc__	178	#elif __aarch64__
		179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		180	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
131	#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")
132	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	182	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
133	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	183	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
134	#elif defined __s390__ \|\| defined __s390x__	184	#elif defined __s390__ \|\| defined __s390x__
135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
136	#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. */
137	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	189	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
138	#elif defined __alpha__	190	#elif defined __alpha__
139	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	191	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
140	#elif defined __hppa__	192	#elif defined __hppa__
141	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")	193	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	194	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
143	#elif defined __ia64__	195	#elif defined __ia64__
144	#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")
145	#endif	203	#endif
146	#endif	204	#endif
147	#endif	205	#endif
148		206
149	#ifndef ECB_MEMORY_FENCE	207	#ifndef ECB_MEMORY_FENCE
150	#if ECB_GCC_VERSION(4,7)	208	#if ECB_GCC_VERSION(4,7)
151	/* see comment below (stdatomic.h) about the C11 memory model. */	209	/* see comment below (stdatomic.h) about the C11 memory model. */
152	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	210	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		211	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		212	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
153		213
154	/* The __has_feature syntax from clang is so misdesigned that we cannot use it	214	#elif ECB_CLANG_EXTENSION(c_atomic)
155	* without risking compile time errors with other compilers. We could
156	* define our own ecb_clang_has_feature, but I just can't be bothered to work
157	* around * this shit time and again.
158	* #elif defined __clang && __has_feature (cxx_atomic)
159	* // see comment below (stdatomic.h) about the C11 memory model.	215	/* see comment below (stdatomic.h) about the C11 memory model. */
160	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	216	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
161	*/	217	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		218	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
162		219
163	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	220	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
164	#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()
165	#elif _MSC_VER >= 1400 /* VC++ 2005 */	228	#elif _MSC_VER >= 1400 /* VC++ 2005 */
166	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	229	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
167	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	230	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
168	#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 */
169	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	232	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
189	/* 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. */
190	/* 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 */
191	/* for most usages, or gcc and clang have a bug */	254	/* for most usages, or gcc and clang have a bug */
192	/* I currently lean towards the latter, and inefficiently implement */	255	/* I currently lean towards the latter, and inefficiently implement */
193	/* 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 */
194	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	259	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
195	#endif	260	#endif
196	#endif	261	#endif
197		262
198	#ifndef ECB_MEMORY_FENCE	263	#ifndef ECB_MEMORY_FENCE
…		…
221	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	286	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
222	#endif	287	#endif
223		288
224	/*****************************************************************************/	289	/*****************************************************************************/
225		290
226	#if __cplusplus	291	#if ECB_CPP
227	#define ecb_inline static inline	292	#define ecb_inline static inline
228	#elif ECB_GCC_VERSION(2,5)	293	#elif ECB_GCC_VERSION(2,5)
229	#define ecb_inline static __inline__	294	#define ecb_inline static __inline__
230	#elif ECB_C99	295	#elif ECB_C99
231	#define ecb_inline static inline	296	#define ecb_inline static inline
…		…
245		310
246	#define ECB_CONCAT_(a, b) a ## b	311	#define ECB_CONCAT_(a, b) a ## b
247	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	312	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
248	#define ECB_STRINGIFY_(a) # a	313	#define ECB_STRINGIFY_(a) # a
249	#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))
250		316
251	#define ecb_function_ ecb_inline	317	#define ecb_function_ ecb_inline
252		318
253	#if ECB_GCC_VERSION(3,1)	319	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
254	#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)
255	#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)
256	#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)
257	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	342	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
258	#else	343	#else
259	#define ecb_attribute(attrlist)
260	#define ecb_is_constant(expr) 0
261	#define ecb_expect(expr,value) (expr)
262	#define ecb_prefetch(addr,rw,locality)	344	#define ecb_prefetch(addr,rw,locality)
263	#endif	345	#endif
264		346
265	/* no emulation for ecb_decltype */	347	/* no emulation for ecb_decltype */
266	#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; };
267	#define ecb_decltype(x) __decltype(x)	351	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
268	#elif ECB_GCC_VERSION(3,0)	352	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
269	#define ecb_decltype(x) __typeof(x)	353	#define ecb_decltype(x) __typeof__ (x)
270	#endif	354	#endif
271		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
272	#define ecb_noinline ecb_attribute ((__noinline__))	373	#define ecb_noinline ecb_attribute ((__noinline__))
		374	#endif
		375
273	#define ecb_unused ecb_attribute ((__unused__))	376	#define ecb_unused ecb_attribute ((__unused__))
274	#define ecb_const ecb_attribute ((__const__))	377	#define ecb_const ecb_attribute ((__const__))
275	#define ecb_pure ecb_attribute ((__pure__))	378	#define ecb_pure ecb_attribute ((__pure__))
276		379
277	#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 */
278	#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)
279	#else	388	#else
280	#define ecb_noreturn ecb_attribute ((__noreturn__))	389	#define ecb_noreturn ecb_attribute ((__noreturn__))
281	#endif	390	#endif
282		391
283	#if ECB_GCC_VERSION(4,3)	392	#if ECB_GCC_VERSION(4,3)
…		…
298	/* for compatibility to the rest of the world */	407	/* for compatibility to the rest of the world */
299	#define ecb_likely(expr) ecb_expect_true (expr)	408	#define ecb_likely(expr) ecb_expect_true (expr)
300	#define ecb_unlikely(expr) ecb_expect_false (expr)	409	#define ecb_unlikely(expr) ecb_expect_false (expr)
301		410
302	/* count trailing zero bits and count # of one bits */	411	/* count trailing zero bits and count # of one bits */
303	#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))
304	/* 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 */
305	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	417	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
306	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	418	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
307	#define ecb_ctz32(x) __builtin_ctz (x)	419	#define ecb_ctz32(x) __builtin_ctz (x)
308	#define ecb_ctz64(x) __builtin_ctzll (x)	420	#define ecb_ctz64(x) __builtin_ctzll (x)
309	#define ecb_popcount32(x) __builtin_popcount (x)	421	#define ecb_popcount32(x) __builtin_popcount (x)
310	/* no popcountll */	422	/* no popcountll */
311	#else	423	#else
312	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	424	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
313	ecb_function_ int	425	ecb_function_ ecb_const int
314	ecb_ctz32 (uint32_t x)	426	ecb_ctz32 (uint32_t x)
315	{	427	{
316	int r = 0;	428	int r = 0;
317		429
318	x &= ~x + 1; /* this isolates the lowest bit */	430	x &= ~x + 1; /* this isolates the lowest bit */
…		…
332	#endif	444	#endif
333		445
334	return r;	446	return r;
335	}	447	}
336		448
337	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
338	ecb_function_ int	450	ecb_function_ ecb_const int
339	ecb_ctz64 (uint64_t x)	451	ecb_ctz64 (uint64_t x)
340	{	452	{
341	int shift = x & 0xffffffffU ? 0 : 32;	453	int shift = x & 0xffffffffU ? 0 : 32;
342	return ecb_ctz32 (x >> shift) + shift;	454	return ecb_ctz32 (x >> shift) + shift;
343	}	455	}
344		456
345	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
346	ecb_function_ int	458	ecb_function_ ecb_const int
347	ecb_popcount32 (uint32_t x)	459	ecb_popcount32 (uint32_t x)
348	{	460	{
349	x -= (x >> 1) & 0x55555555;	461	x -= (x >> 1) & 0x55555555;
350	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	462	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
351	x = ((x >> 4) + x) & 0x0f0f0f0f;	463	x = ((x >> 4) + x) & 0x0f0f0f0f;
352	x *= 0x01010101;	464	x *= 0x01010101;
353		465
354	return x >> 24;	466	return x >> 24;
355	}	467	}
356		468
357	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	469	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
358	ecb_function_ int ecb_ld32 (uint32_t x)	470	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
359	{	471	{
360	int r = 0;	472	int r = 0;
361		473
362	if (x >> 16) { x >>= 16; r += 16; }	474	if (x >> 16) { x >>= 16; r += 16; }
363	if (x >> 8) { x >>= 8; r += 8; }	475	if (x >> 8) { x >>= 8; r += 8; }
…		…
366	if (x >> 1) { r += 1; }	478	if (x >> 1) { r += 1; }
367		479
368	return r;	480	return r;
369	}	481	}
370		482
371	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	483	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
372	ecb_function_ int ecb_ld64 (uint64_t x)	484	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
373	{	485	{
374	int r = 0;	486	int r = 0;
375		487
376	if (x >> 32) { x >>= 32; r += 32; }	488	if (x >> 32) { x >>= 32; r += 32; }
377		489
378	return r + ecb_ld32 (x);	490	return r + ecb_ld32 (x);
379	}	491	}
380	#endif	492	#endif
381		493
382	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);
383	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)); }
384	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);
385	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)); }
386		498
387	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	499	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
388	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	500	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
389	{	501	{
390	return ( (x * 0x0802U & 0x22110U)	502	return ( (x * 0x0802U & 0x22110U)
391	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	503	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
392	}	504	}
393		505
394	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	506	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
395	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	507	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
396	{	508	{
397	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	509	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
398	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	510	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
399	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	511	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
400	x = ( x >> 8 ) \| ( x << 8);	512	x = ( x >> 8 ) \| ( x << 8);
401		513
402	return x;	514	return x;
403	}	515	}
404		516
405	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	517	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
406	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	518	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
407	{	519	{
408	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	520	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
409	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	521	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
410	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	522	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
411	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	523	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
414	return x;	526	return x;
415	}	527	}
416		528
417	/* popcount64 is only available on 64 bit cpus as gcc builtin */	529	/* popcount64 is only available on 64 bit cpus as gcc builtin */
418	/* so for this version we are lazy */	530	/* so for this version we are lazy */
419	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	531	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
420	ecb_function_ int	532	ecb_function_ ecb_const int
421	ecb_popcount64 (uint64_t x)	533	ecb_popcount64 (uint64_t x)
422	{	534	{
423	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	535	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
424	}	536	}
425		537
426	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);
427	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);
428	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);
429	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);
430	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);
431	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);
432	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);
433	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);
434		546
435	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); }
436	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); }
437	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); }
438	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); }
439	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); }
440	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); }
441	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); }
442	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); }
443		555
444	#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
445	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	560	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		561	#endif
446	#define ecb_bswap32(x) __builtin_bswap32 (x)	562	#define ecb_bswap32(x) __builtin_bswap32 (x)
447	#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)))
448	#else	569	#else
449	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	570	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
450	ecb_function_ uint16_t	571	ecb_function_ ecb_const uint16_t
451	ecb_bswap16 (uint16_t x)	572	ecb_bswap16 (uint16_t x)
452	{	573	{
453	return ecb_rotl16 (x, 8);	574	return ecb_rotl16 (x, 8);
454	}	575	}
455		576
456	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	577	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
457	ecb_function_ uint32_t	578	ecb_function_ ecb_const uint32_t
458	ecb_bswap32 (uint32_t x)	579	ecb_bswap32 (uint32_t x)
459	{	580	{
460	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	581	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
461	}	582	}
462		583
463	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	584	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
464	ecb_function_ uint64_t	585	ecb_function_ ecb_const uint64_t
465	ecb_bswap64 (uint64_t x)	586	ecb_bswap64 (uint64_t x)
466	{	587	{
467	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	588	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
468	}	589	}
469	#endif	590	#endif
470		591
471	#if ECB_GCC_VERSION(4,5)	592	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
472	#define ecb_unreachable() __builtin_unreachable ()	593	#define ecb_unreachable() __builtin_unreachable ()
473	#else	594	#else
474	/* 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 :/ */
475	ecb_inline void ecb_unreachable (void) ecb_noreturn;	596	ecb_inline ecb_noreturn void ecb_unreachable (void);
476	ecb_inline void ecb_unreachable (void) { }	597	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
477	#endif	598	#endif
478		599
479	/* try to tell the compiler that some condition is definitely true */	600	/* try to tell the compiler that some condition is definitely true */
480	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	601	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
481		602
482	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	603	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
483	ecb_inline unsigned char	604	ecb_inline ecb_const unsigned char
484	ecb_byteorder_helper (void)	605	ecb_byteorder_helper (void)
485	{	606	{
486	/* the union code still generates code under pressure in gcc, */	607	/* the union code still generates code under pressure in gcc, */
487	/* but less than using pointers, and always seem to */	608	/* but less than using pointers, and always seems to */
488	/* successfully return a constant. */	609	/* successfully return a constant. */
489	/* the reason why we have this horrible preprocessor mess */	610	/* the reason why we have this horrible preprocessor mess */
490	/* 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 */
491	/* and yes, gcc defines __BYTE_ORDER__, g++ does not */	612	/* or when using a recent enough gcc version (>= 4.6) */
492	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	613	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
493	return 0x44;	614	return 0x44;
494	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	615	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
495	return 0x44;	616	return 0x44;
496	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	617	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
497	retrurn 0x11;	618	return 0x11;
498	#else	619	#else
499	union	620	union
500	{	621	{
501	uint32_t i;	622	uint32_t i;
502	uint8_t c;	623	uint8_t c;
503	} u = { 0x11223344 };	624	} u = { 0x11223344 };
504	return u.c;	625	return u.c;
505	#endif	626	#endif
506	}	627	}
507		628
508	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	629	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
509	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; }
510	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	631	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
511	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; }
512		633
513	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	634	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
514	#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))
515	#else	636	#else
516	#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)))
517	#endif	638	#endif
518		639
519	#if __cplusplus	640	#if ECB_CPP
520	template<typename T>	641	template<typename T>
521	static inline T ecb_div_rd (T val, T div)	642	static inline T ecb_div_rd (T val, T div)
522	{	643	{
523	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	644	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
524	}	645	}
…		…
548		669
549	/* basically, everything uses "ieee pure-endian" floating point numbers */	670	/* basically, everything uses "ieee pure-endian" floating point numbers */
550	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	671	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
551	#if 0 \	672	#if 0 \
552	\|\| __i386 \|\| __i386__ \	673	\|\| __i386 \|\| __i386__ \
553	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	674	\|\| ECB_GCC_AMD64 \
554	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	675	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
555	\|\| defined __arm__ && defined __ARM_EABI__ \
556	\|\| defined __s390__ \|\| defined __s390x__ \	676	\|\| defined __s390__ \|\| defined __s390x__ \
557	\|\| defined __mips__ \	677	\|\| defined __mips__ \
558	\|\| defined __alpha__ \	678	\|\| defined __alpha__ \
559	\|\| defined __hppa__ \	679	\|\| defined __hppa__ \
560	\|\| defined __ia64__ \	680	\|\| defined __ia64__ \
		681	\|\| defined __m68k__ \
		682	\|\| defined __m88k__ \
		683	\|\| defined __sh__ \
561	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	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__
562	#define ECB_STDFP 1	687	#define ECB_STDFP 1
563	#include <string.h> /* for memcpy */	688	#include <string.h> /* for memcpy */
564	#else	689	#else
565	#define ECB_STDFP 0	690	#define ECB_STDFP 0
566	#include <math.h> /* for frexp, ldexp */
567	#endif	691	#endif
568		692
569	#ifndef ECB_NO_LIBM	693	#ifndef ECB_NO_LIBM
570		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
		702	#endif
		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
571	/* convert a float to ieee single/binary32 */	735	/* convert a float to ieee single/binary32 */
572	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	736	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
573	ecb_function_ uint32_t	737	ecb_function_ ecb_const uint32_t
574	ecb_float_to_binary32 (float x)	738	ecb_float_to_binary32 (float x)
575	{	739	{
576	uint32_t r;	740	uint32_t r;
577		741
578	#if ECB_STDFP	742	#if ECB_STDFP
…		…
585	if (x == 0e0f ) return 0x00000000U;	749	if (x == 0e0f ) return 0x00000000U;
586	if (x > +3.40282346638528860e+38f) return 0x7f800000U;	750	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
587	if (x < -3.40282346638528860e+38f) return 0xff800000U;	751	if (x < -3.40282346638528860e+38f) return 0xff800000U;
588	if (x != x ) return 0x7fbfffffU;	752	if (x != x ) return 0x7fbfffffU;
589		753
590	m = frexpf (x, &e) * 0x1000000U;	754	m = ecb_frexpf (x, &e) * 0x1000000U;
591		755
592	r = m & 0x80000000U;	756	r = m & 0x80000000U;
593		757
594	if (r)	758	if (r)
595	m = -m;	759	m = -m;
…		…
607		771
608	return r;	772	return r;
609	}	773	}
610		774
611	/* converts an ieee single/binary32 to a float */	775	/* converts an ieee single/binary32 to a float */
612	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	776	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
613	ecb_function_ float	777	ecb_function_ ecb_const float
614	ecb_binary32_to_float (uint32_t x)	778	ecb_binary32_to_float (uint32_t x)
615	{	779	{
616	float r;	780	float r;
617		781
618	#if ECB_STDFP	782	#if ECB_STDFP
…		…
628	x \|= 0x800000U;	792	x \|= 0x800000U;
629	else	793	else
630	e = 1;	794	e = 1;
631		795
632	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	796	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
633	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	797	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
634		798
635	r = neg ? -r : r;	799	r = neg ? -r : r;
636	#endif	800	#endif
637		801
638	return r;	802	return r;
639	}	803	}
640		804
641	/* convert a double to ieee double/binary64 */	805	/* convert a double to ieee double/binary64 */
642	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	806	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
643	ecb_function_ uint64_t	807	ecb_function_ ecb_const uint64_t
644	ecb_double_to_binary64 (double x)	808	ecb_double_to_binary64 (double x)
645	{	809	{
646	uint64_t r;	810	uint64_t r;
647		811
648	#if ECB_STDFP	812	#if ECB_STDFP
…		…
677		841
678	return r;	842	return r;
679	}	843	}
680		844
681	/* converts an ieee double/binary64 to a double */	845	/* converts an ieee double/binary64 to a double */
682	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	846	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
683	ecb_function_ double	847	ecb_function_ ecb_const double
684	ecb_binary64_to_double (uint64_t x)	848	ecb_binary64_to_double (uint64_t x)
685	{	849	{
686	double r;	850	double r;
687		851
688	#if ECB_STDFP	852	#if ECB_STDFP

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libeio/ecb.h (file contents): Revision 1.15 by root, Wed Jul 25 16:12:28 2012 UTC vs. Revision 1.26 by root, Mon Sep 21 08:01:00 2015 UTC

Diff Legend

Comparing libeio/ecb.h (file contents):
Revision 1.15 by root, Wed Jul 25 16:12:28 2012 UTC vs.
Revision 1.26 by root, Mon Sep 21 08:01:00 2015 UTC