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

Comparing libecb/ecb.h (file contents):
Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs.
Revision 1.137 by root, Tue Oct 14 14:01:07 2014 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2014 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
		43
		44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x00010003
32		46
33	#ifdef _WIN32	47	#ifdef _WIN32
34	typedef signed char int8_t;	48	typedef signed char int8_t;
35	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
36	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
42	typedef unsigned long long uint64_t;	56	typedef unsigned long long uint64_t;
43	#else /* _MSC_VER \|\| __BORLANDC__ */	57	#else /* _MSC_VER \|\| __BORLANDC__ */
44	typedef signed __int64 int64_t;	58	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	59	typedef unsigned __int64 uint64_t;
46	#endif	60	#endif
		61	#ifdef _WIN64
		62	#define ECB_PTRSIZE 8
		63	typedef uint64_t uintptr_t;
		64	typedef int64_t intptr_t;
		65	#else
		66	#define ECB_PTRSIZE 4
		67	typedef uint32_t uintptr_t;
		68	typedef int32_t intptr_t;
		69	#endif
47	#else	70	#else
48	#include <inttypes.h>	71	#include <inttypes.h>
		72	#if UINTMAX_MAX > 0xffffffffU
		73	#define ECB_PTRSIZE 8
		74	#else
		75	#define ECB_PTRSIZE 4
		76	#endif
		77	#endif
		78
		79	/* work around x32 idiocy by defining proper macros */
		80	#if __amd64 \|\| __x86_64 \|\| _M_AMD64 \|\| _M_X64
		81	#if _ILP32
		82	#define ECB_AMD64_X32 1
		83	#else
		84	#define ECB_AMD64 1
		85	#endif
49	#endif	86	#endif
50		87
51	/* many compilers define _GNUC_ to some versions but then only implement	88	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	89	* what their idiot authors think are the "more important" extensions,
53	* causing enormous grief in return for some better fake benchmark numbers.	90	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	91	* or so.
55	* we try to detect these and simply assume they are not gcc - if they have	92	* we try to detect these and simply assume they are not gcc - if they have
56	* an issue with that they should have done it right in the first place.	93	* an issue with that they should have done it right in the first place.
57	*/	94	*/
58	#ifndef ECB_GCC_VERSION
59	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)	95	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
60	#define ECB_GCC_VERSION(major,minor) 0	96	#define ECB_GCC_VERSION(major,minor) 0
61	#else	97	#else
62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	98	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63	#endif	99	#endif
		100
		101	#define ECB_CPP (__cplusplus+0)
		102	#define ECB_CPP11 (__cplusplus >= 201103L)
		103
		104	#if ECB_CPP
		105	#define ECB_C 0
		106	#define ECB_STDC_VERSION 0
		107	#else
		108	#define ECB_C 1
		109	#define ECB_STDC_VERSION __STDC_VERSION__
		110	#endif
		111
		112	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		113	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		114
		115	#if ECB_CPP
		116	#define ECB_EXTERN_C extern "C"
		117	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		118	#define ECB_EXTERN_C_END }
		119	#else
		120	#define ECB_EXTERN_C extern
		121	#define ECB_EXTERN_C_BEG
		122	#define ECB_EXTERN_C_END
64	#endif	123	#endif
65		124
66	/*****************************************************************************/	125	/*****************************************************************************/
67		126
68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	127	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
69	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	128	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70		129
71	#if ECB_NO_THREADS \|\| ECB_NO_SMP	130	#if ECB_NO_THREADS
		131	#define ECB_NO_SMP 1
		132	#endif
		133
		134	#if ECB_NO_SMP
72	#define ECB_MEMORY_FENCE do { } while (0)	135	#define ECB_MEMORY_FENCE do { } while (0)
73	#endif	136	#endif
74		137
75	#ifndef ECB_MEMORY_FENCE	138	#ifndef ECB_MEMORY_FENCE
76	#if ECB_GCC_VERSION(2,5)	139	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
77	#if __i386__	140	#if __i386 \|\| __i386__
78	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	141	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
79	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	142	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
80	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	143	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
81	#elif __amd64	144	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__
82	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	145	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
83	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	146	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
84	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	147	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
85	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	148	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	149	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
87	#elif defined(__ARM_ARCH_6__ ) \|\| defined(__ARM_ARCH_6J__ ) \	150	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
88	\|\| defined(__ARM_ARCH_6K__) \|\| defined(__ARM_ARCH_6ZK__)	151	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
89	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	152	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
90	#elif defined(__ARM_ARCH_7__ ) \|\| defined(__ARM_ARCH_7A__ ) \	153	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
91	\|\| defined(__ARM_ARCH_7M__) \|\| defined(__ARM_ARCH_7R__ )	154	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
92	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	155	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		156	#elif __aarch64__
		157	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		158	#elif (__sparc \|\| __sparc__) && !__sparcv8
		159	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
		160	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
		161	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
		162	#elif defined __s390__ \|\| defined __s390x__
		163	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
		164	#elif defined __mips__
		165	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		166	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
		167	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
		168	#elif defined __alpha__
		169	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		170	#elif defined __hppa__
		171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		172	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		173	#elif defined __ia64__
		174	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		175	#elif defined __m68k__
		176	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		177	#elif defined __m88k__
		178	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		179	#elif defined __sh__
		180	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
93	#endif	181	#endif
94	#endif	182	#endif
95	#endif	183	#endif
96		184
97	#ifndef ECB_MEMORY_FENCE	185	#ifndef ECB_MEMORY_FENCE
		186	#if ECB_GCC_VERSION(4,7)
		187	/* see comment below (stdatomic.h) about the C11 memory model. */
		188	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		189	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		190	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		191
		192	/* The __has_feature syntax from clang is so misdesigned that we cannot use it
		193	* without risking compile time errors with other compilers. We could
		194	* define our own ecb_clang_has_feature, but I just can't be bothered to work
		195	* around this shit time and again.
		196	* #elif defined __clang && __has_feature (cxx_atomic)
		197	* // see comment below (stdatomic.h) about the C11 memory model.
		198	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		199	* #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		200	* #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		201	*/
		202
98	#if ECB_GCC_VERSION(4,4) \|\| defined(__INTEL_COMPILER)	203	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
99	#define ECB_MEMORY_FENCE __sync_synchronize ()	204	#define ECB_MEMORY_FENCE __sync_synchronize ()
100	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	205	#elif _MSC_VER >= 1500 /* VC++ 2008 */
101	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	206	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		207	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		208	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		209	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		210	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
102	#elif _MSC_VER >= 1400 /* VC++ 2005 */	211	#elif _MSC_VER >= 1400 /* VC++ 2005 */
103	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	212	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
104	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	213	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
105	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	214	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
106	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	215	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
107	#elif defined(_WIN32)	216	#elif defined _WIN32
108	#include <WinNT.h>	217	#include <WinNT.h>
109	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	218	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
		219	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		220	#include <mbarrier.h>
		221	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
		222	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
		223	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
		224	#elif __xlC__
		225	#define ECB_MEMORY_FENCE __sync ()
		226	#endif
		227	#endif
		228
		229	#ifndef ECB_MEMORY_FENCE
		230	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		231	/* we assume that these memory fences work on all variables/all memory accesses, */
		232	/* not just C11 atomics and atomic accesses */
		233	#include <stdatomic.h>
		234	/* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
		235	/* any fence other than seq_cst, which isn't very efficient for us. */
		236	/* Why that is, we don't know - either the C11 memory model is quite useless */
		237	/* for most usages, or gcc and clang have a bug */
		238	/* I currently lean towards the latter, and inefficiently implement */
		239	/* all three of ecb's fences as a seq_cst fence */
		240	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		241	/* for all __atomic_thread_fence's except seq_cst */
		242	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
110	#endif	243	#endif
111	#endif	244	#endif
112		245
113	#ifndef ECB_MEMORY_FENCE	246	#ifndef ECB_MEMORY_FENCE
114	#if !ECB_AVOID_PTHREADS	247	#if !ECB_AVOID_PTHREADS
…		…
126	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;	259	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
127	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)	260	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
128	#endif	261	#endif
129	#endif	262	#endif
130		263
131	#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)	264	#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
132	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE	265	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
133	#endif	266	#endif
134		267
135	#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)	268	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
136	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	269	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
137	#endif	270	#endif
138		271
139	/*****************************************************************************/	272	/*****************************************************************************/
140
141	#define ECB_C99 (__STDC_VERSION__ >= 199901L)
142		273
143	#if __cplusplus	274	#if __cplusplus
144	#define ecb_inline static inline	275	#define ecb_inline static inline
145	#elif ECB_GCC_VERSION(2,5)	276	#elif ECB_GCC_VERSION(2,5)
146	#define ecb_inline static __inline__	277	#define ecb_inline static __inline__
…		…
172	#define ecb_is_constant(expr) __builtin_constant_p (expr)	303	#define ecb_is_constant(expr) __builtin_constant_p (expr)
173	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	304	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
174	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	305	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
175	#else	306	#else
176	#define ecb_attribute(attrlist)	307	#define ecb_attribute(attrlist)
		308
		309	/* possible C11 impl for integral types
		310	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		311	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		312
177	#define ecb_is_constant(expr) 0	313	#define ecb_is_constant(expr) 0
178	#define ecb_expect(expr,value) (expr)	314	#define ecb_expect(expr,value) (expr)
179	#define ecb_prefetch(addr,rw,locality)	315	#define ecb_prefetch(addr,rw,locality)
180	#endif	316	#endif
181		317
…		…
184	#define ecb_decltype(x) __decltype(x)	320	#define ecb_decltype(x) __decltype(x)
185	#elif ECB_GCC_VERSION(3,0)	321	#elif ECB_GCC_VERSION(3,0)
186	#define ecb_decltype(x) __typeof(x)	322	#define ecb_decltype(x) __typeof(x)
187	#endif	323	#endif
188		324
		325	#if _MSC_VER >= 1300
		326	#define ecb_deprecated __declspec(deprecated)
		327	#else
		328	#define ecb_deprecated ecb_attribute ((__deprecated__))
		329	#endif
		330
189	#define ecb_noinline ecb_attribute ((__noinline__))	331	#define ecb_noinline ecb_attribute ((__noinline__))
190	#define ecb_noreturn ecb_attribute ((__noreturn__))
191	#define ecb_unused ecb_attribute ((__unused__))	332	#define ecb_unused ecb_attribute ((__unused__))
192	#define ecb_const ecb_attribute ((__const__))	333	#define ecb_const ecb_attribute ((__const__))
193	#define ecb_pure ecb_attribute ((__pure__))	334	#define ecb_pure ecb_attribute ((__pure__))
		335
		336	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
		337	#if ECB_C11
		338	#define ecb_noreturn _Noreturn
		339	#else
		340	#define ecb_noreturn ecb_attribute ((__noreturn__))
		341	#endif
194		342
195	#if ECB_GCC_VERSION(4,3)	343	#if ECB_GCC_VERSION(4,3)
196	#define ecb_artificial ecb_attribute ((__artificial__))	344	#define ecb_artificial ecb_attribute ((__artificial__))
197	#define ecb_hot ecb_attribute ((__hot__))	345	#define ecb_hot ecb_attribute ((__hot__))
198	#define ecb_cold ecb_attribute ((__cold__))	346	#define ecb_cold ecb_attribute ((__cold__))
…		…
289		437
290	return r + ecb_ld32 (x);	438	return r + ecb_ld32 (x);
291	}	439	}
292	#endif	440	#endif
293		441
		442	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
		443	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		444	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
		445	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		446
		447	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
		448	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
		449	{
		450	return ( (x * 0x0802U & 0x22110U)
		451	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
		452	}
		453
		454	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
		455	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
		456	{
		457	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
		458	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
		459	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
		460	x = ( x >> 8 ) \| ( x << 8);
		461
		462	return x;
		463	}
		464
		465	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
		466	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
		467	{
		468	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
		469	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
		470	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
		471	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
		472	x = ( x >> 16 ) \| ( x << 16);
		473
		474	return x;
		475	}
		476
294	/* popcount64 is only available on 64 bit cpus as gcc builtin */	477	/* popcount64 is only available on 64 bit cpus as gcc builtin */
295	/* so for this version we are lazy */	478	/* so for this version we are lazy */
296	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	479	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
297	ecb_function_ int	480	ecb_function_ int
298	ecb_popcount64 (uint64_t x)	481	ecb_popcount64 (uint64_t x)
…		…
347		530
348	#if ECB_GCC_VERSION(4,5)	531	#if ECB_GCC_VERSION(4,5)
349	#define ecb_unreachable() __builtin_unreachable ()	532	#define ecb_unreachable() __builtin_unreachable ()
350	#else	533	#else
351	/* this seems to work fine, but gcc always emits a warning for it :/ */	534	/* this seems to work fine, but gcc always emits a warning for it :/ */
352	ecb_function_ void ecb_unreachable (void) ecb_noreturn;	535	ecb_inline void ecb_unreachable (void) ecb_noreturn;
353	ecb_function_ void ecb_unreachable (void) { }	536	ecb_inline void ecb_unreachable (void) { }
354	#endif	537	#endif
355		538
356	/* try to tell the compiler that some condition is definitely true */	539	/* try to tell the compiler that some condition is definitely true */
357	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	540	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
358		541
359	ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;	542	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
360	ecb_function_ unsigned char	543	ecb_inline unsigned char
361	ecb_byteorder_helper (void)	544	ecb_byteorder_helper (void)
362	{	545	{
363	const uint32_t u = 0x11223344;	546	/* the union code still generates code under pressure in gcc, */
364	return (unsigned char )&u;	547	/* but less than using pointers, and always seems to */
		548	/* successfully return a constant. */
		549	/* the reason why we have this horrible preprocessor mess */
		550	/* is to avoid it in all cases, at least on common architectures */
		551	/* or when using a recent enough gcc version (>= 4.6) */
		552	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64
		553	return 0x44;
		554	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
		555	return 0x44;
		556	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
		557	return 0x11;
		558	#else
		559	union
		560	{
		561	uint32_t i;
		562	uint8_t c;
		563	} u = { 0x11223344 };
		564	return u.c;
		565	#endif
365	}	566	}
366		567
367	ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;	568	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
368	ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	569	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
369	ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;	570	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
370	ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	571	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
371		572
372	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	573	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
373	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	574	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
374	#else	575	#else
375	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	576	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
376	#endif	577	#endif
377		578
		579	#if __cplusplus
		580	template<typename T>
		581	static inline T ecb_div_rd (T val, T div)
		582	{
		583	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
		584	}
		585	template<typename T>
		586	static inline T ecb_div_ru (T val, T div)
		587	{
		588	return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
		589	}
		590	#else
378	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))	591	#define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
379	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))	592	#define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
		593	#endif
380		594
381	#if ecb_cplusplus_does_not_suck	595	#if ecb_cplusplus_does_not_suck
382	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */	596	/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
383	template<typename T, int N>	597	template<typename T, int N>
384	static inline int ecb_array_length (const T (&arr)[N])	598	static inline int ecb_array_length (const T (&arr)[N])
…		…
387	}	601	}
388	#else	602	#else
389	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	603	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
390	#endif	604	#endif
391		605
		606	/*******************************************************************************/
		607	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		608
		609	/* basically, everything uses "ieee pure-endian" floating point numbers */
		610	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		611	#if 0 \
		612	\|\| __i386 \|\| __i386__ \
		613	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \
		614	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		615	\|\| defined __s390__ \|\| defined __s390x__ \
		616	\|\| defined __mips__ \
		617	\|\| defined __alpha__ \
		618	\|\| defined __hppa__ \
		619	\|\| defined __ia64__ \
		620	\|\| defined __m68k__ \
		621	\|\| defined __m88k__ \
		622	\|\| defined __sh__ \
		623	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64 \
		624	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		625	\|\| defined __aarch64__
		626	#define ECB_STDFP 1
		627	#include <string.h> /* for memcpy */
		628	#else
		629	#define ECB_STDFP 0
		630	#endif
		631
		632	#ifndef ECB_NO_LIBM
		633
		634	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		635
		636	/* only the oldest of old doesn't have this one. solaris. */
		637	#ifdef INFINITY
		638	#define ECB_INFINITY INFINITY
		639	#else
		640	#define ECB_INFINITY HUGE_VAL
392	#endif	641	#endif
393		642
		643	#ifdef NAN
		644	#define ECB_NAN NAN
		645	#else
		646	#define ECB_NAN ECB_INFINITY
		647	#endif
		648
		649	/* converts an ieee half/binary16 to a float */
		650	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
		651	ecb_function_ float
		652	ecb_binary16_to_float (uint16_t x)
		653	{
		654	int e = (x >> 10) & 0x1f;
		655	int m = x & 0x3ff;
		656	float r;
		657
		658	if (!e ) r = ldexpf (m , -24);
		659	else if (e != 31) r = ldexpf (m + 0x400, e - 25);
		660	else if (m ) r = ECB_NAN;
		661	else r = ECB_INFINITY;
		662
		663	return x & 0x8000 ? -r : r;
		664	}
		665
		666	/* convert a float to ieee single/binary32 */
		667	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
		668	ecb_function_ uint32_t
		669	ecb_float_to_binary32 (float x)
		670	{
		671	uint32_t r;
		672
		673	#if ECB_STDFP
		674	memcpy (&r, &x, 4);
		675	#else
		676	/* slow emulation, works for anything but -0 */
		677	uint32_t m;
		678	int e;
		679
		680	if (x == 0e0f ) return 0x00000000U;
		681	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		682	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		683	if (x != x ) return 0x7fbfffffU;
		684
		685	m = frexpf (x, &e) * 0x1000000U;
		686
		687	r = m & 0x80000000U;
		688
		689	if (r)
		690	m = -m;
		691
		692	if (e <= -126)
		693	{
		694	m &= 0xffffffU;
		695	m >>= (-125 - e);
		696	e = -126;
		697	}
		698
		699	r \|= (e + 126) << 23;
		700	r \|= m & 0x7fffffU;
		701	#endif
		702
		703	return r;
		704	}
		705
		706	/* converts an ieee single/binary32 to a float */
		707	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
		708	ecb_function_ float
		709	ecb_binary32_to_float (uint32_t x)
		710	{
		711	float r;
		712
		713	#if ECB_STDFP
		714	memcpy (&r, &x, 4);
		715	#else
		716	/* emulation, only works for normals and subnormals and +0 */
		717	int neg = x >> 31;
		718	int e = (x >> 23) & 0xffU;
		719
		720	x &= 0x7fffffU;
		721
		722	if (e)
		723	x \|= 0x800000U;
		724	else
		725	e = 1;
		726
		727	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		728	r = ldexpf (x * (0.5f / 0x800000U), e - 126);
		729
		730	r = neg ? -r : r;
		731	#endif
		732
		733	return r;
		734	}
		735
		736	/* convert a double to ieee double/binary64 */
		737	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
		738	ecb_function_ uint64_t
		739	ecb_double_to_binary64 (double x)
		740	{
		741	uint64_t r;
		742
		743	#if ECB_STDFP
		744	memcpy (&r, &x, 8);
		745	#else
		746	/* slow emulation, works for anything but -0 */
		747	uint64_t m;
		748	int e;
		749
		750	if (x == 0e0 ) return 0x0000000000000000U;
		751	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		752	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		753	if (x != x ) return 0X7ff7ffffffffffffU;
		754
		755	m = frexp (x, &e) * 0x20000000000000U;
		756
		757	r = m & 0x8000000000000000;;
		758
		759	if (r)
		760	m = -m;
		761
		762	if (e <= -1022)
		763	{
		764	m &= 0x1fffffffffffffU;
		765	m >>= (-1021 - e);
		766	e = -1022;
		767	}
		768
		769	r \|= ((uint64_t)(e + 1022)) << 52;
		770	r \|= m & 0xfffffffffffffU;
		771	#endif
		772
		773	return r;
		774	}
		775
		776	/* converts an ieee double/binary64 to a double */
		777	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
		778	ecb_function_ double
		779	ecb_binary64_to_double (uint64_t x)
		780	{
		781	double r;
		782
		783	#if ECB_STDFP
		784	memcpy (&r, &x, 8);
		785	#else
		786	/* emulation, only works for normals and subnormals and +0 */
		787	int neg = x >> 63;
		788	int e = (x >> 52) & 0x7ffU;
		789
		790	x &= 0xfffffffffffffU;
		791
		792	if (e)
		793	x \|= 0x10000000000000U;
		794	else
		795	e = 1;
		796
		797	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		798	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		799
		800	r = neg ? -r : r;
		801	#endif
		802
		803	return r;
		804	}
		805
		806	#endif
		807
		808	#endif
		809

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Comparing libecb/ecb.h (file contents): Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs. Revision 1.137 by root, Tue Oct 14 14:01:07 2014 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.67 by sf-exg, Wed Aug 24 23:28:47 2011 UTC vs.
Revision 1.137 by root, Tue Oct 14 14:01:07 2014 UTC