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

Comparing libeio/ecb.h (file contents):
Revision 1.11 by root, Tue Apr 24 18:47:50 2012 UTC vs.
Revision 1.30 by root, Wed Feb 26 15:33:00 2020 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
32		43
33	#ifdef _WIN32	44	/* 16 bits major, 16 bits minor */
		45	#define ECB_VERSION 0x00010008
		46
		47	#include <string.h> /* for memcpy */
		48
		49	#if defined (_WIN32) && !defined (__MINGW32__)
34	typedef signed char int8_t;	50	typedef signed char int8_t;
35	typedef unsigned char uint8_t;	51	typedef unsigned char uint8_t;
		52	typedef signed char int_fast8_t;
		53	typedef unsigned char uint_fast8_t;
36	typedef signed short int16_t;	54	typedef signed short int16_t;
37	typedef unsigned short uint16_t;	55	typedef unsigned short uint16_t;
		56	typedef signed int int_fast16_t;
		57	typedef unsigned int uint_fast16_t;
38	typedef signed int int32_t;	58	typedef signed int int32_t;
39	typedef unsigned int uint32_t;	59	typedef unsigned int uint32_t;
		60	typedef signed int int_fast32_t;
		61	typedef unsigned int uint_fast32_t;
40	#if __GNUC__	62	#if __GNUC__
41	typedef signed long long int64_t;	63	typedef signed long long int64_t;
42	typedef unsigned long long uint64_t;	64	typedef unsigned long long uint64_t;
43	#else /* _MSC_VER \|\| __BORLANDC__ */	65	#else /* _MSC_VER \|\| __BORLANDC__ */
44	typedef signed __int64 int64_t;	66	typedef signed __int64 int64_t;
45	typedef unsigned __int64 uint64_t;	67	typedef unsigned __int64 uint64_t;
46	#endif	68	#endif
		69	typedef int64_t int_fast64_t;
		70	typedef uint64_t uint_fast64_t;
		71	#ifdef _WIN64
		72	#define ECB_PTRSIZE 8
		73	typedef uint64_t uintptr_t;
		74	typedef int64_t intptr_t;
		75	#else
		76	#define ECB_PTRSIZE 4
		77	typedef uint32_t uintptr_t;
		78	typedef int32_t intptr_t;
		79	#endif
47	#else	80	#else
48	#include <inttypes.h>	81	#include <inttypes.h>
		82	#if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
		83	#define ECB_PTRSIZE 8
		84	#else
		85	#define ECB_PTRSIZE 4
		86	#endif
		87	#endif
		88
		89	#define ECB_GCC_AMD64 (__amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__)
		90	#define ECB_MSVC_AMD64 (_M_AMD64 \|\| _M_X64)
		91
		92	#ifndef ECB_OPTIMIZE_SIZE
		93	#if __OPTIMIZE_SIZE__
		94	#define ECB_OPTIMIZE_SIZE 1
		95	#else
		96	#define ECB_OPTIMIZE_SIZE 0
		97	#endif
		98	#endif
		99
		100	/* work around x32 idiocy by defining proper macros */
		101	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
		102	#if _ILP32
		103	#define ECB_AMD64_X32 1
		104	#else
		105	#define ECB_AMD64 1
		106	#endif
49	#endif	107	#endif
50		108
51	/* many compilers define _GNUC_ to some versions but then only implement	109	/* many compilers define _GNUC_ to some versions but then only implement
52	* what their idiot authors think are the "more important" extensions,	110	* what their idiot authors think are the "more important" extensions,
53	* causing enormous grief in return for some better fake benchmark numbers.	111	* causing enormous grief in return for some better fake benchmark numbers.
54	* or so.	112	* or so.
55	* we try to detect these and simply assume they are not gcc - if they have	113	* 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.	114	* an issue with that they should have done it right in the first place.
57	*/	115	*/
58	#ifndef ECB_GCC_VERSION
59	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	116	#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	117	#define ECB_GCC_VERSION(major,minor) 0
61	#else	118	#else
62	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	119	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63	#endif	120	#endif
		121
		122	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
		123
		124	#if __clang__ && defined __has_builtin
		125	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		126	#else
		127	#define ECB_CLANG_BUILTIN(x) 0
		128	#endif
		129
		130	#if __clang__ && defined __has_extension
		131	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		132	#else
		133	#define ECB_CLANG_EXTENSION(x) 0
		134	#endif
		135
		136	#define ECB_CPP (__cplusplus+0)
		137	#define ECB_CPP11 (__cplusplus >= 201103L)
		138	#define ECB_CPP14 (__cplusplus >= 201402L)
		139	#define ECB_CPP17 (__cplusplus >= 201703L)
		140
		141	#if ECB_CPP
		142	#define ECB_C 0
		143	#define ECB_STDC_VERSION 0
		144	#else
		145	#define ECB_C 1
		146	#define ECB_STDC_VERSION __STDC_VERSION__
		147	#endif
		148
		149	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		150	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		151	#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
		152
		153	#if ECB_CPP
		154	#define ECB_EXTERN_C extern "C"
		155	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		156	#define ECB_EXTERN_C_END }
		157	#else
		158	#define ECB_EXTERN_C extern
		159	#define ECB_EXTERN_C_BEG
		160	#define ECB_EXTERN_C_END
64	#endif	161	#endif
65		162
66	/*****************************************************************************/	163	/*****************************************************************************/
67		164
68	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	165	/* 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 */	166	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70		167
71	#if ECB_NO_THREADS	168	#if ECB_NO_THREADS
72	# define ECB_NO_SMP 1	169	#define ECB_NO_SMP 1
73	#endif	170	#endif
74		171
75	#if ECB_NO_THREADS \|\| ECB_NO_SMP	172	#if ECB_NO_SMP
76	#define ECB_MEMORY_FENCE do { } while (0)	173	#define ECB_MEMORY_FENCE do { } while (0)
		174	#endif
		175
		176	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		177	#if __xlC__ && ECB_CPP
		178	#include <builtins.h>
		179	#endif
		180
		181	#if 1400 <= _MSC_VER
		182	#include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
77	#endif	183	#endif
78		184
79	#ifndef ECB_MEMORY_FENCE	185	#ifndef ECB_MEMORY_FENCE
80	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	186	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
		187	#define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
81	#if __i386 \|\| __i386__	188	#if __i386 \|\| __i386__
82	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	189	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
83	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */	190	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
84	#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */	191	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
85	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	192	#elif ECB_GCC_AMD64
86	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	193	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
87	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")	194	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
88	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */	195	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
89	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	196	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
90	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	197	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
		198	#elif defined __ARM_ARCH_2__ \
		199	\|\| defined __ARM_ARCH_3__ \|\| defined __ARM_ARCH_3M__ \
		200	\|\| defined __ARM_ARCH_4__ \|\| defined __ARM_ARCH_4T__ \
		201	\|\| defined __ARM_ARCH_5__ \|\| defined __ARM_ARCH_5E__ \
		202	\|\| defined __ARM_ARCH_5T__ \|\| defined __ARM_ARCH_5TE__ \
		203	\|\| defined __ARM_ARCH_5TEJ__
		204	/* should not need any, unless running old code on newer cpu - arm doesn't support that */
91	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \	205	#elif defined __ARM_ARCH_6__ \|\| defined __ARM_ARCH_6J__ \
92	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	206	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__ \
		207	\|\| defined __ARM_ARCH_6T2__
93	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	208	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
94	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	209	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
95	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	210	\|\| defined __ARM_ARCH_7R__ \|\| defined __ARM_ARCH_7M__
96	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	211	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
97	#elif __sparc \|\| __sparc__	212	#elif __aarch64__
		213	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
		214	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
98	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad \| " : : : "memory")	215	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
99	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	216	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
100	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	217	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
101	#elif defined __s390__ \|\| defined __s390x__	218	#elif defined __s390__ \|\| defined __s390x__
102	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	219	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
103	#elif defined __mips__	220	#elif defined __mips__
		221	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		222	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
104	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	223	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
105	#elif defined __alpha__	224	#elif defined __alpha__
106	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	225	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
		226	#elif defined __hppa__
		227	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		228	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
		229	#elif defined __ia64__
		230	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		231	#elif defined __m68k__
		232	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		233	#elif defined __m88k__
		234	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		235	#elif defined __sh__
		236	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
107	#endif	237	#endif
108	#endif	238	#endif
109	#endif	239	#endif
110		240
111	#ifndef ECB_MEMORY_FENCE	241	#ifndef ECB_MEMORY_FENCE
		242	#if ECB_GCC_VERSION(4,7)
		243	/* see comment below (stdatomic.h) about the C11 memory model. */
		244	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		245	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		246	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		247	#define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
		248
		249	#elif ECB_CLANG_EXTENSION(c_atomic)
		250	/* see comment below (stdatomic.h) about the C11 memory model. */
		251	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		252	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		253	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		254	#define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
		255
112	#if ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	256	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
113	#define ECB_MEMORY_FENCE __sync_synchronize ()	257	#define ECB_MEMORY_FENCE __sync_synchronize ()
114	/#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) /	258	#elif _MSC_VER >= 1500 /* VC++ 2008 */
115	/#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) /	259	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		260	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		261	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		262	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		263	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
116	#elif _MSC_VER >= 1400 /* VC++ 2005 */	264	#elif _MSC_VER >= 1400 /* VC++ 2005 */
117	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	265	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
118	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	266	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
119	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	267	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
120	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	268	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
121	#elif defined _WIN32	269	#elif defined _WIN32
122	#include <WinNT.h>	270	#include <WinNT.h>
123	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */	271	#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
124	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	272	#elif __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
125	#include <mbarrier.h>	273	#include <mbarrier.h>
126	#define ECB_MEMORY_FENCE __machine_rw_barrier ()	274	#define ECB_MEMORY_FENCE __machine_rw_barrier ()
127	#define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()	275	#define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
128	#define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()	276	#define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
		277	#define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
129	#elif __xlC__	278	#elif __xlC__
130	#define ECB_MEMORY_FENCE __sync ()	279	#define ECB_MEMORY_FENCE __sync ()
		280	#endif
		281	#endif
		282
		283	#ifndef ECB_MEMORY_FENCE
		284	#if ECB_C11 && !defined __STDC_NO_ATOMICS__
		285	/* we assume that these memory fences work on all variables/all memory accesses, */
		286	/* not just C11 atomics and atomic accesses */
		287	#include <stdatomic.h>
		288	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
		289	#define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
		290	#define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
131	#endif	291	#endif
132	#endif	292	#endif
133		293
134	#ifndef ECB_MEMORY_FENCE	294	#ifndef ECB_MEMORY_FENCE
135	#if !ECB_AVOID_PTHREADS	295	#if !ECB_AVOID_PTHREADS
…		…
155		315
156	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE	316	#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
157	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	317	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
158	#endif	318	#endif
159		319
		320	#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
		321	#define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
		322	#endif
		323
160	/*****************************************************************************/	324	/*****************************************************************************/
161		325
162	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	326	#if ECB_CPP
163
164	#if __cplusplus
165	#define ecb_inline static inline	327	#define ecb_inline static inline
166	#elif ECB_GCC_VERSION(2,5)	328	#elif ECB_GCC_VERSION(2,5)
167	#define ecb_inline static __inline__	329	#define ecb_inline static __inline__
168	#elif ECB_C99	330	#elif ECB_C99
169	#define ecb_inline static inline	331	#define ecb_inline static inline
…		…
183		345
184	#define ECB_CONCAT_(a, b) a ## b	346	#define ECB_CONCAT_(a, b) a ## b
185	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	347	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
186	#define ECB_STRINGIFY_(a) # a	348	#define ECB_STRINGIFY_(a) # a
187	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	349	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		350	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
188		351
189	#define ecb_function_ ecb_inline	352	#define ecb_function_ ecb_inline
190		353
191	#if ECB_GCC_VERSION(3,1)	354	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
192	#define ecb_attribute(attrlist) __attribute__(attrlist)	355	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		356	#else
		357	#define ecb_attribute(attrlist)
		358	#endif
		359
		360	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
193	#define ecb_is_constant(expr) __builtin_constant_p (expr)	361	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		362	#else
		363	/* possible C11 impl for integral types
		364	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		365	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		366
		367	#define ecb_is_constant(expr) 0
		368	#endif
		369
		370	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
194	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	371	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		372	#else
		373	#define ecb_expect(expr,value) (expr)
		374	#endif
		375
		376	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
195	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	377	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
196	#else	378	#else
197	#define ecb_attribute(attrlist)
198	#define ecb_is_constant(expr) 0
199	#define ecb_expect(expr,value) (expr)
200	#define ecb_prefetch(addr,rw,locality)	379	#define ecb_prefetch(addr,rw,locality)
201	#endif	380	#endif
202		381
203	/* no emulation for ecb_decltype */	382	/* no emulation for ecb_decltype */
204	#if ECB_GCC_VERSION(4,5)	383	#if ECB_CPP11
		384	// older implementations might have problems with decltype(x)::type, work around it
		385	template<class T> struct ecb_decltype_t { typedef T type; };
205	#define ecb_decltype(x) __decltype(x)	386	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
206	#elif ECB_GCC_VERSION(3,0)	387	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
207	#define ecb_decltype(x) __typeof(x)	388	#define ecb_decltype(x) __typeof__ (x)
208	#endif	389	#endif
209		390
		391	#if _MSC_VER >= 1300
		392	#define ecb_deprecated __declspec (deprecated)
		393	#else
		394	#define ecb_deprecated ecb_attribute ((__deprecated__))
		395	#endif
		396
		397	#if _MSC_VER >= 1500
		398	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		399	#elif ECB_GCC_VERSION(4,5)
		400	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		401	#else
		402	#define ecb_deprecated_message(msg) ecb_deprecated
		403	#endif
		404
		405	#if _MSC_VER >= 1400
		406	#define ecb_noinline __declspec (noinline)
		407	#else
210	#define ecb_noinline ecb_attribute ((__noinline__))	408	#define ecb_noinline ecb_attribute ((__noinline__))
211	#define ecb_noreturn ecb_attribute ((__noreturn__))	409	#endif
		410
212	#define ecb_unused ecb_attribute ((__unused__))	411	#define ecb_unused ecb_attribute ((__unused__))
213	#define ecb_const ecb_attribute ((__const__))	412	#define ecb_const ecb_attribute ((__const__))
214	#define ecb_pure ecb_attribute ((__pure__))	413	#define ecb_pure ecb_attribute ((__pure__))
		414
		415	#if ECB_C11 \|\| __IBMC_NORETURN
		416	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
		417	#define ecb_noreturn _Noreturn
		418	#elif ECB_CPP11
		419	#define ecb_noreturn [[noreturn]]
		420	#elif _MSC_VER >= 1200
		421	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		422	#define ecb_noreturn __declspec (noreturn)
		423	#else
		424	#define ecb_noreturn ecb_attribute ((__noreturn__))
		425	#endif
215		426
216	#if ECB_GCC_VERSION(4,3)	427	#if ECB_GCC_VERSION(4,3)
217	#define ecb_artificial ecb_attribute ((__artificial__))	428	#define ecb_artificial ecb_attribute ((__artificial__))
218	#define ecb_hot ecb_attribute ((__hot__))	429	#define ecb_hot ecb_attribute ((__hot__))
219	#define ecb_cold ecb_attribute ((__cold__))	430	#define ecb_cold ecb_attribute ((__cold__))
…		…
231	/* for compatibility to the rest of the world */	442	/* for compatibility to the rest of the world */
232	#define ecb_likely(expr) ecb_expect_true (expr)	443	#define ecb_likely(expr) ecb_expect_true (expr)
233	#define ecb_unlikely(expr) ecb_expect_false (expr)	444	#define ecb_unlikely(expr) ecb_expect_false (expr)
234		445
235	/* count trailing zero bits and count # of one bits */	446	/* count trailing zero bits and count # of one bits */
236	#if ECB_GCC_VERSION(3,4)	447	#if ECB_GCC_VERSION(3,4) \
		448	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		449	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		450	&& ECB_CLANG_BUILTIN(__builtin_popcount))
237	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	451	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
238	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	452	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
239	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	453	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
240	#define ecb_ctz32(x) __builtin_ctz (x)	454	#define ecb_ctz32(x) __builtin_ctz (x)
241	#define ecb_ctz64(x) __builtin_ctzll (x)	455	#define ecb_ctz64(x) __builtin_ctzll (x)
242	#define ecb_popcount32(x) __builtin_popcount (x)	456	#define ecb_popcount32(x) __builtin_popcount (x)
243	/* no popcountll */	457	/* no popcountll */
244	#else	458	#else
245	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	459	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
246	ecb_function_ int	460	ecb_function_ ecb_const int
247	ecb_ctz32 (uint32_t x)	461	ecb_ctz32 (uint32_t x)
248	{	462	{
		463	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		464	unsigned long r;
		465	_BitScanForward (&r, x);
		466	return (int)r;
		467	#else
249	int r = 0;	468	int r = 0;
250		469
251	x &= ~x + 1; /* this isolates the lowest bit */	470	x &= ~x + 1; /* this isolates the lowest bit */
252		471
253	#if ECB_branchless_on_i386	472	#if ECB_branchless_on_i386
…		…
263	if (x & 0xff00ff00) r += 8;	482	if (x & 0xff00ff00) r += 8;
264	if (x & 0xffff0000) r += 16;	483	if (x & 0xffff0000) r += 16;
265	#endif	484	#endif
266		485
267	return r;	486	return r;
		487	#endif
268	}	488	}
269		489
270	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	490	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
271	ecb_function_ int	491	ecb_function_ ecb_const int
272	ecb_ctz64 (uint64_t x)	492	ecb_ctz64 (uint64_t x)
273	{	493	{
		494	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		495	unsigned long r;
		496	_BitScanForward64 (&r, x);
		497	return (int)r;
		498	#else
274	int shift = x & 0xffffffffU ? 0 : 32;	499	int shift = x & 0xffffffff ? 0 : 32;
275	return ecb_ctz32 (x >> shift) + shift;	500	return ecb_ctz32 (x >> shift) + shift;
		501	#endif
276	}	502	}
277		503
278	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	504	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
279	ecb_function_ int	505	ecb_function_ ecb_const int
280	ecb_popcount32 (uint32_t x)	506	ecb_popcount32 (uint32_t x)
281	{	507	{
282	x -= (x >> 1) & 0x55555555;	508	x -= (x >> 1) & 0x55555555;
283	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	509	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
284	x = ((x >> 4) + x) & 0x0f0f0f0f;	510	x = ((x >> 4) + x) & 0x0f0f0f0f;
285	x *= 0x01010101;	511	x *= 0x01010101;
286		512
287	return x >> 24;	513	return x >> 24;
288	}	514	}
289		515
290	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	516	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
291	ecb_function_ int ecb_ld32 (uint32_t x)	517	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
292	{	518	{
		519	#if 1400 <= _MSC_VER && (_M_IX86 \|\| _M_X64 \|\| _M_IA64 \|\| _M_ARM)
		520	unsigned long r;
		521	_BitScanReverse (&r, x);
		522	return (int)r;
		523	#else
293	int r = 0;	524	int r = 0;
294		525
295	if (x >> 16) { x >>= 16; r += 16; }	526	if (x >> 16) { x >>= 16; r += 16; }
296	if (x >> 8) { x >>= 8; r += 8; }	527	if (x >> 8) { x >>= 8; r += 8; }
297	if (x >> 4) { x >>= 4; r += 4; }	528	if (x >> 4) { x >>= 4; r += 4; }
298	if (x >> 2) { x >>= 2; r += 2; }	529	if (x >> 2) { x >>= 2; r += 2; }
299	if (x >> 1) { r += 1; }	530	if (x >> 1) { r += 1; }
300		531
301	return r;	532	return r;
		533	#endif
302	}	534	}
303		535
304	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	536	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
305	ecb_function_ int ecb_ld64 (uint64_t x)	537	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
306	{	538	{
		539	#if 1400 <= _MSC_VER && (_M_X64 \|\| _M_IA64 \|\| _M_ARM)
		540	unsigned long r;
		541	_BitScanReverse64 (&r, x);
		542	return (int)r;
		543	#else
307	int r = 0;	544	int r = 0;
308		545
309	if (x >> 32) { x >>= 32; r += 32; }	546	if (x >> 32) { x >>= 32; r += 32; }
310		547
311	return r + ecb_ld32 (x);	548	return r + ecb_ld32 (x);
312	}
313	#endif	549	#endif
		550	}
		551	#endif
314		552
		553	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
		554	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
		555	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
		556	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
		557
315	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	558	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
316	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	559	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
317	{	560	{
318	return ( (x * 0x0802U & 0x22110U)	561	return ( (x * 0x0802U & 0x22110U)
319	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	562	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
320	}	563	}
321		564
322	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	565	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
323	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	566	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
324	{	567	{
325	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	568	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
326	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	569	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
327	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	570	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
328	x = ( x >> 8 ) \| ( x << 8);	571	x = ( x >> 8 ) \| ( x << 8);
329		572
330	return x;	573	return x;
331	}	574	}
332		575
333	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	576	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
334	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	577	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
335	{	578	{
336	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	579	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
337	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	580	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
338	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	581	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
339	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	582	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
342	return x;	585	return x;
343	}	586	}
344		587
345	/* popcount64 is only available on 64 bit cpus as gcc builtin */	588	/* popcount64 is only available on 64 bit cpus as gcc builtin */
346	/* so for this version we are lazy */	589	/* so for this version we are lazy */
347	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	590	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
348	ecb_function_ int	591	ecb_function_ ecb_const int
349	ecb_popcount64 (uint64_t x)	592	ecb_popcount64 (uint64_t x)
350	{	593	{
351	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	594	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
352	}	595	}
353		596
354	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	597	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
355	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	598	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
356	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	599	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
357	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	600	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
358	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	601	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
359	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	602	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
360	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	603	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
361	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	604	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
362		605
363	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	606	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
364	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	607	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
365	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	608	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
366	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	609	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
367	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	610	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
368	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	611	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
369	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	612	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
370	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	613	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
371		614
372	#if ECB_GCC_VERSION(4,3)	615	#if ECB_CPP
		616
		617	inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
		618	inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
		619	inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
		620	inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
		621
		622	inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
		623	inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
		624	inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
		625	inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
		626
		627	inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
		628	inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
		629	inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
		630	inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
		631
		632	inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
		633	inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
		634	inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
		635	inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
		636
		637	inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
		638	inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
		639	inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
		640
		641	inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
		642	inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
		643	inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
		644	inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
		645
		646	inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
		647	inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
		648	inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
		649	inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
		650
		651	#endif
		652
		653	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		654	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		655	#define ecb_bswap16(x) __builtin_bswap16 (x)
		656	#else
373	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	657	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		658	#endif
374	#define ecb_bswap32(x) __builtin_bswap32 (x)	659	#define ecb_bswap32(x) __builtin_bswap32 (x)
375	#define ecb_bswap64(x) __builtin_bswap64 (x)	660	#define ecb_bswap64(x) __builtin_bswap64 (x)
		661	#elif _MSC_VER
		662	#include <stdlib.h>
		663	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		664	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		665	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
376	#else	666	#else
377	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	667	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
378	ecb_function_ uint16_t	668	ecb_function_ ecb_const uint16_t
379	ecb_bswap16 (uint16_t x)	669	ecb_bswap16 (uint16_t x)
380	{	670	{
381	return ecb_rotl16 (x, 8);	671	return ecb_rotl16 (x, 8);
382	}	672	}
383		673
384	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	674	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
385	ecb_function_ uint32_t	675	ecb_function_ ecb_const uint32_t
386	ecb_bswap32 (uint32_t x)	676	ecb_bswap32 (uint32_t x)
387	{	677	{
388	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	678	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
389	}	679	}
390		680
391	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	681	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
392	ecb_function_ uint64_t	682	ecb_function_ ecb_const uint64_t
393	ecb_bswap64 (uint64_t x)	683	ecb_bswap64 (uint64_t x)
394	{	684	{
395	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	685	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
396	}	686	}
397	#endif	687	#endif
398		688
399	#if ECB_GCC_VERSION(4,5)	689	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
400	#define ecb_unreachable() __builtin_unreachable ()	690	#define ecb_unreachable() __builtin_unreachable ()
401	#else	691	#else
402	/* this seems to work fine, but gcc always emits a warning for it :/ */	692	/* this seems to work fine, but gcc always emits a warning for it :/ */
403	ecb_inline void ecb_unreachable (void) ecb_noreturn;	693	ecb_inline ecb_noreturn void ecb_unreachable (void);
404	ecb_inline void ecb_unreachable (void) { }	694	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
405	#endif	695	#endif
406		696
407	/* try to tell the compiler that some condition is definitely true */	697	/* try to tell the compiler that some condition is definitely true */
408	#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)	698	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
409		699
410	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	700	ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
411	ecb_inline unsigned char	701	ecb_inline ecb_const uint32_t
412	ecb_byteorder_helper (void)	702	ecb_byteorder_helper (void)
413	{	703	{
414	const uint32_t u = 0x11223344;	704	/* the union code still generates code under pressure in gcc, */
415	return (unsigned char )&u;	705	/* but less than using pointers, and always seems to */
		706	/* successfully return a constant. */
		707	/* the reason why we have this horrible preprocessor mess */
		708	/* is to avoid it in all cases, at least on common architectures */
		709	/* or when using a recent enough gcc version (>= 4.6) */
		710	#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
		711	\|\| ((__i386 \|\| __i386__ \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64) && !__VOS__)
		712	#define ECB_LITTLE_ENDIAN 1
		713	return 0x44332211;
		714	#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
		715	\|\| ((__AARCH64EB__ \|\| __MIPSEB__ \|\| __ARMEB__) && !__VOS__)
		716	#define ECB_BIG_ENDIAN 1
		717	return 0x11223344;
		718	#else
		719	union
		720	{
		721	uint8_t c[4];
		722	uint32_t u;
		723	} u = { 0x11, 0x22, 0x33, 0x44 };
		724	return u.u;
		725	#endif
416	}	726	}
417		727
418	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	728	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
419	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	729	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
420	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	730	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
421	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	731	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
		732
		733	/*****************************************************************************/
		734	/* unaligned load/store */
		735
		736	ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		737	ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		738	ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		739
		740	ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		741	ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		742	ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		743
		744	ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		745	ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		746	ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
		747
		748	ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
		749	ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
		750	ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
		751
		752	ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
		753	ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
		754	ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
		755
		756	ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
		757	ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
		758	ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
		759
		760	ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
		761	ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
		762	ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
		763
		764	ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
		765	ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
		766	ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
		767
		768	ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
		769	ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
		770	ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
		771
		772	ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
		773	ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
		774	ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
		775
		776	#if ECB_CPP
		777
		778	inline uint8_t ecb_bswap (uint8_t v) { return v; }
		779	inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
		780	inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
		781	inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
		782
		783	template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		784	template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		785	template<typename T> inline T ecb_peek (const void ptr) { return (const T *)ptr; }
		786	template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
		787	template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
		788	template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
		789	template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
		790	template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
		791
		792	template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
		793	template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
		794	template<typename T> inline void ecb_poke (void ptr, T v) { (T *)ptr = v; }
		795	template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
		796	template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
		797	template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
		798	template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
		799	template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
		800
		801	#endif
		802
		803	/*****************************************************************************/
422		804
423	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	805	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
424	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	806	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
425	#else	807	#else
426	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	808	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
427	#endif	809	#endif
428		810
429	#if __cplusplus	811	#if ECB_CPP
430	template<typename T>	812	template<typename T>
431	static inline T ecb_div_rd (T val, T div)	813	static inline T ecb_div_rd (T val, T div)
432	{	814	{
433	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	815	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
434	}	816	}
…		…
451	}	833	}
452	#else	834	#else
453	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	835	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
454	#endif	836	#endif
455		837
		838	/*****************************************************************************/
		839
		840	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		841	ecb_function_ ecb_const uint32_t
		842	ecb_binary16_to_binary32 (uint32_t x)
		843	{
		844	unsigned int s = (x & 0x8000) << (31 - 15);
		845	int e = (x >> 10) & 0x001f;
		846	unsigned int m = x & 0x03ff;
		847
		848	if (ecb_expect_false (e == 31))
		849	/* infinity or NaN */
		850	e = 255 - (127 - 15);
		851	else if (ecb_expect_false (!e))
		852	{
		853	if (ecb_expect_true (!m))
		854	/* zero, handled by code below by forcing e to 0 */
		855	e = 0 - (127 - 15);
		856	else
		857	{
		858	/* subnormal, renormalise */
		859	unsigned int s = 10 - ecb_ld32 (m);
		860
		861	m = (m << s) & 0x3ff; /* mask implicit bit */
		862	e -= s - 1;
		863	}
		864	}
		865
		866	/* e and m now are normalised, or zero, (or inf or nan) */
		867	e += 127 - 15;
		868
		869	return s \| (e << 23) \| (m << (23 - 10));
		870	}
		871
		872	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		873	ecb_function_ ecb_const uint16_t
		874	ecb_binary32_to_binary16 (uint32_t x)
		875	{
		876	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		877	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		878	unsigned int m = x & 0x007fffff;
		879
		880	x &= 0x7fffffff;
		881
		882	/* if it's within range of binary16 normals, use fast path */
		883	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		884	{
		885	/* mantissa round-to-even */
		886	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		887
		888	/* handle overflow */
		889	if (ecb_expect_false (m >= 0x00800000))
		890	{
		891	m >>= 1;
		892	e += 1;
		893	}
		894
		895	return s \| (e << 10) \| (m >> (23 - 10));
		896	}
		897
		898	/* handle large numbers and infinity */
		899	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		900	return s \| 0x7c00;
		901
		902	/* handle zero, subnormals and small numbers */
		903	if (ecb_expect_true (x < 0x38800000))
		904	{
		905	/* zero */
		906	if (ecb_expect_true (!x))
		907	return s;
		908
		909	/* handle subnormals */
		910
		911	/* too small, will be zero */
		912	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		913	return s;
		914
		915	m \|= 0x00800000; /* make implicit bit explicit */
		916
		917	/* very tricky - we need to round to the nearest e (+10) bit value */
		918	{
		919	unsigned int bits = 14 - e;
		920	unsigned int half = (1 << (bits - 1)) - 1;
		921	unsigned int even = (m >> bits) & 1;
		922
		923	/* if this overflows, we will end up with a normalised number */
		924	m = (m + half + even) >> bits;
		925	}
		926
		927	return s \| m;
		928	}
		929
		930	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		931	m >>= 13;
		932
		933	return s \| 0x7c00 \| m \| !m;
		934	}
		935
		936	/*******************************************************************************/
		937	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		938
		939	/* basically, everything uses "ieee pure-endian" floating point numbers */
		940	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		941	#if 0 \
		942	\|\| __i386 \|\| __i386__ \
		943	\|\| ECB_GCC_AMD64 \
		944	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		945	\|\| defined __s390__ \|\| defined __s390x__ \
		946	\|\| defined __mips__ \
		947	\|\| defined __alpha__ \
		948	\|\| defined __hppa__ \
		949	\|\| defined __ia64__ \
		950	\|\| defined __m68k__ \
		951	\|\| defined __m88k__ \
		952	\|\| defined __sh__ \
		953	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		954	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		955	\|\| defined __aarch64__
		956	#define ECB_STDFP 1
		957	#else
		958	#define ECB_STDFP 0
		959	#endif
		960
		961	#ifndef ECB_NO_LIBM
		962
		963	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		964
		965	/* only the oldest of old doesn't have this one. solaris. */
		966	#ifdef INFINITY
		967	#define ECB_INFINITY INFINITY
		968	#else
		969	#define ECB_INFINITY HUGE_VAL
456	#endif	970	#endif
457		971
		972	#ifdef NAN
		973	#define ECB_NAN NAN
		974	#else
		975	#define ECB_NAN ECB_INFINITY
		976	#endif
		977
		978	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		979	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		980	#define ecb_frexpf(x,e) frexpf ((x), (e))
		981	#else
		982	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
		983	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
		984	#endif
		985
		986	/* convert a float to ieee single/binary32 */
		987	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		988	ecb_function_ ecb_const uint32_t
		989	ecb_float_to_binary32 (float x)
		990	{
		991	uint32_t r;
		992
		993	#if ECB_STDFP
		994	memcpy (&r, &x, 4);
		995	#else
		996	/* slow emulation, works for anything but -0 */
		997	uint32_t m;
		998	int e;
		999
		1000	if (x == 0e0f ) return 0x00000000U;
		1001	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		1002	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		1003	if (x != x ) return 0x7fbfffffU;
		1004
		1005	m = ecb_frexpf (x, &e) * 0x1000000U;
		1006
		1007	r = m & 0x80000000U;
		1008
		1009	if (r)
		1010	m = -m;
		1011
		1012	if (e <= -126)
		1013	{
		1014	m &= 0xffffffU;
		1015	m >>= (-125 - e);
		1016	e = -126;
		1017	}
		1018
		1019	r \|= (e + 126) << 23;
		1020	r \|= m & 0x7fffffU;
		1021	#endif
		1022
		1023	return r;
		1024	}
		1025
		1026	/* converts an ieee single/binary32 to a float */
		1027	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		1028	ecb_function_ ecb_const float
		1029	ecb_binary32_to_float (uint32_t x)
		1030	{
		1031	float r;
		1032
		1033	#if ECB_STDFP
		1034	memcpy (&r, &x, 4);
		1035	#else
		1036	/* emulation, only works for normals and subnormals and +0 */
		1037	int neg = x >> 31;
		1038	int e = (x >> 23) & 0xffU;
		1039
		1040	x &= 0x7fffffU;
		1041
		1042	if (e)
		1043	x \|= 0x800000U;
		1044	else
		1045	e = 1;
		1046
		1047	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		1048	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		1049
		1050	r = neg ? -r : r;
		1051	#endif
		1052
		1053	return r;
		1054	}
		1055
		1056	/* convert a double to ieee double/binary64 */
		1057	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		1058	ecb_function_ ecb_const uint64_t
		1059	ecb_double_to_binary64 (double x)
		1060	{
		1061	uint64_t r;
		1062
		1063	#if ECB_STDFP
		1064	memcpy (&r, &x, 8);
		1065	#else
		1066	/* slow emulation, works for anything but -0 */
		1067	uint64_t m;
		1068	int e;
		1069
		1070	if (x == 0e0 ) return 0x0000000000000000U;
		1071	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		1072	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		1073	if (x != x ) return 0X7ff7ffffffffffffU;
		1074
		1075	m = frexp (x, &e) * 0x20000000000000U;
		1076
		1077	r = m & 0x8000000000000000;;
		1078
		1079	if (r)
		1080	m = -m;
		1081
		1082	if (e <= -1022)
		1083	{
		1084	m &= 0x1fffffffffffffU;
		1085	m >>= (-1021 - e);
		1086	e = -1022;
		1087	}
		1088
		1089	r \|= ((uint64_t)(e + 1022)) << 52;
		1090	r \|= m & 0xfffffffffffffU;
		1091	#endif
		1092
		1093	return r;
		1094	}
		1095
		1096	/* converts an ieee double/binary64 to a double */
		1097	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		1098	ecb_function_ ecb_const double
		1099	ecb_binary64_to_double (uint64_t x)
		1100	{
		1101	double r;
		1102
		1103	#if ECB_STDFP
		1104	memcpy (&r, &x, 8);
		1105	#else
		1106	/* emulation, only works for normals and subnormals and +0 */
		1107	int neg = x >> 63;
		1108	int e = (x >> 52) & 0x7ffU;
		1109
		1110	x &= 0xfffffffffffffU;
		1111
		1112	if (e)
		1113	x \|= 0x10000000000000U;
		1114	else
		1115	e = 1;
		1116
		1117	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		1118	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		1119
		1120	r = neg ? -r : r;
		1121	#endif
		1122
		1123	return r;
		1124	}
		1125
		1126	/* convert a float to ieee half/binary16 */
		1127	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		1128	ecb_function_ ecb_const uint16_t
		1129	ecb_float_to_binary16 (float x)
		1130	{
		1131	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		1132	}
		1133
		1134	/* convert an ieee half/binary16 to float */
		1135	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		1136	ecb_function_ ecb_const float
		1137	ecb_binary16_to_float (uint16_t x)
		1138	{
		1139	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		1140	}
		1141
		1142	#endif
		1143
		1144	#endif
		1145

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Comparing libeio/ecb.h (file contents): Revision 1.11 by root, Tue Apr 24 18:47:50 2012 UTC vs. Revision 1.30 by root, Wed Feb 26 15:33:00 2020 UTC

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Comparing libeio/ecb.h (file contents):
Revision 1.11 by root, Tue Apr 24 18:47:50 2012 UTC vs.
Revision 1.30 by root, Wed Feb 26 15:33:00 2020 UTC