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

Comparing libeio/ecb.h (file contents):
Revision 1.14 by root, Sun Jun 17 17:07:25 2012 UTC vs.
Revision 1.23 by root, Wed Feb 11 19:32:36 2015 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>	4	* Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
5	* Copyright (©) 2011 Emanuele Giaquinta	5	* Copyright (©) 2011 Emanuele Giaquinta
6	* All rights reserved.	6	* All rights reserved.
7	*	7	*
8	* Redistribution and use in source and binary forms, with or without modifica-	8	* Redistribution and use in source and binary forms, with or without modifica-
9	* tion, are permitted provided that the following conditions are met:	9	* tion, are permitted provided that the following conditions are met:
23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED	26	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27	* OF THE POSSIBILITY OF SUCH DAMAGE.	27	* OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*
		29	* Alternatively, the contents of this file may be used under the terms of
		30	* the GNU General Public License ("GPL") version 2 or any later version,
		31	* in which case the provisions of the GPL are applicable instead of
		32	* the above. If you wish to allow the use of your version of this file
		33	* only under the terms of the GPL and not to allow others to use your
		34	* version of this file under the BSD license, indicate your decision
		35	* by deleting the provisions above and replace them with the notice
		36	* and other provisions required by the GPL. If you do not delete the
		37	* provisions above, a recipient may use your version of this file under
		38	* either the BSD or the GPL.
28	*/	39	*/
29		40
30	#ifndef ECB_H	41	#ifndef ECB_H
31	#define ECB_H	42	#define ECB_H
32		43
33	/* 16 bits major, 16 bits minor */	44	/* 16 bits major, 16 bits minor */
34	#define ECB_VERSION 0x00010001	45	#define ECB_VERSION 0x00010004
35		46
36	#ifdef _WIN32	47	#ifdef _WIN32
37	typedef signed char int8_t;	48	typedef signed char int8_t;
38	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
39	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
54	#else	65	#else
55	#define ECB_PTRSIZE 4	66	#define ECB_PTRSIZE 4
56	typedef uint32_t uintptr_t;	67	typedef uint32_t uintptr_t;
57	typedef int32_t intptr_t;	68	typedef int32_t intptr_t;
58	#endif	69	#endif
59	typedef intptr_t ptrdiff_t;
60	#else	70	#else
61	#include <inttypes.h>	71	#include <inttypes.h>
62	#if UINTMAX_MAX > 0xffffffffU	72	#if UINTMAX_MAX > 0xffffffffU
63	#define ECB_PTRSIZE 8	73	#define ECB_PTRSIZE 8
64	#else	74	#else
65	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
		76	#endif
		77	#endif
		78
		79	/* 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
66	#endif	85	#endif
67	#endif	86	#endif
68		87
69	/* many compilers define _GNUC_ to some versions but then only implement	88	/* many compilers define _GNUC_ to some versions but then only implement
70	* what their idiot authors think are the "more important" extensions,	89	* what their idiot authors think are the "more important" extensions,
71	* causing enormous grief in return for some better fake benchmark numbers.	90	* causing enormous grief in return for some better fake benchmark numbers.
72	* or so.	91	* or so.
73	* 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
74	* 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.
75	*/	94	*/
76	#ifndef ECB_GCC_VERSION
77	#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__
78	#define ECB_GCC_VERSION(major,minor) 0	96	#define ECB_GCC_VERSION(major,minor) 0
79	#else	97	#else
80	#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)))
81	#endif	99	#endif
82	#endif
83		100
84	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	101	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
85	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	102
86	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	103	#if __clang__ && defined __has_builtin
		104	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		105	#else
		106	#define ECB_CLANG_BUILTIN(x) 0
		107	#endif
		108
		109	#if __clang__ && defined __has_extension
		110	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		111	#else
		112	#define ECB_CLANG_EXTENSION(x) 0
		113	#endif
		114
87	#define ECB_CPP (__cplusplus+0)	115	#define ECB_CPP (__cplusplus+0)
88	#define ECB_CPP11 (__cplusplus >= 201103L)	116	#define ECB_CPP11 (__cplusplus >= 201103L)
		117
		118	#if ECB_CPP
		119	#define ECB_C 0
		120	#define ECB_STDC_VERSION 0
		121	#else
		122	#define ECB_C 1
		123	#define ECB_STDC_VERSION __STDC_VERSION__
		124	#endif
		125
		126	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		127	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
		128
		129	#if ECB_CPP
		130	#define ECB_EXTERN_C extern "C"
		131	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
		132	#define ECB_EXTERN_C_END }
		133	#else
		134	#define ECB_EXTERN_C extern
		135	#define ECB_EXTERN_C_BEG
		136	#define ECB_EXTERN_C_END
		137	#endif
89		138
90	/*****************************************************************************/	139	/*****************************************************************************/
91		140
92	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */	141	/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
93	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */	142	/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
…		…
116	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	165	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
117	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	166	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
118	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	167	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
119	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	168	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
120	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	169	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		170	#elif __aarch64__
		171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
121	#elif __sparc \|\| __sparc__	172	#elif (__sparc \|\| __sparc__) && !__sparcv8
122	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	173	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
123	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	174	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
124	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	175	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
125	#elif defined __s390__ \|\| defined __s390x__	176	#elif defined __s390__ \|\| defined __s390x__
126	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
127	#elif defined __mips__	178	#elif defined __mips__
		179	/* GNU/Linux emulates sync on mips1 architectures, so we force its use */
		180	/* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	181	#define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
129	#elif defined __alpha__	182	#elif defined __alpha__
130	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")	183	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
131	#elif defined __hppa__	184	#elif defined __hppa__
132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
133	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	186	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
134	#elif defined __ia64__	187	#elif defined __ia64__
135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")	188	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
		189	#elif defined __m68k__
		190	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
		191	#elif defined __m88k__
		192	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
		193	#elif defined __sh__
		194	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
136	#endif	195	#endif
137	#endif	196	#endif
138	#endif	197	#endif
139		198
140	#ifndef ECB_MEMORY_FENCE	199	#ifndef ECB_MEMORY_FENCE
141	#if ECB_GCC_VERSION(4,7)	200	#if ECB_GCC_VERSION(4,7)
142	/* see comment below (stdatomic.h) about the C11 memory model. */	201	/* see comment below (stdatomic.h) about the C11 memory model. */
143	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	202	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
144	#elif defined __clang && __has_feature (cxx_atomic)	203	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		204	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
		205
		206	#elif ECB_CLANG_EXTENSION(c_atomic)
145	/* see comment below (stdatomic.h) about the C11 memory model. */	207	/* see comment below (stdatomic.h) about the C11 memory model. */
146	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	208	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
		209	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		210	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
		211
147	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	212	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
148	#define ECB_MEMORY_FENCE __sync_synchronize ()	213	#define ECB_MEMORY_FENCE __sync_synchronize ()
		214	#elif _MSC_VER >= 1500 /* VC++ 2008 */
		215	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
		216	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
		217	#define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
		218	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
		219	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
149	#elif _MSC_VER >= 1400 /* VC++ 2005 */	220	#elif _MSC_VER >= 1400 /* VC++ 2005 */
150	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)	221	#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
151	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()	222	#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
152	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */	223	#define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
153	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()	224	#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
…		…
173	/* any fence other than seq_cst, which isn't very efficient for us. */	244	/* any fence other than seq_cst, which isn't very efficient for us. */
174	/* Why that is, we don't know - either the C11 memory model is quite useless */	245	/* Why that is, we don't know - either the C11 memory model is quite useless */
175	/* for most usages, or gcc and clang have a bug */	246	/* for most usages, or gcc and clang have a bug */
176	/* I currently lean towards the latter, and inefficiently implement */	247	/* I currently lean towards the latter, and inefficiently implement */
177	/* all three of ecb's fences as a seq_cst fence */	248	/* all three of ecb's fences as a seq_cst fence */
		249	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		250	/* for all __atomic_thread_fence's except seq_cst */
178	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	251	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
179	#endif	252	#endif
180	#endif	253	#endif
181		254
182	#ifndef ECB_MEMORY_FENCE	255	#ifndef ECB_MEMORY_FENCE
…		…
205	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	278	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
206	#endif	279	#endif
207		280
208	/*****************************************************************************/	281	/*****************************************************************************/
209		282
210	#if __cplusplus	283	#if ECB_CPP
211	#define ecb_inline static inline	284	#define ecb_inline static inline
212	#elif ECB_GCC_VERSION(2,5)	285	#elif ECB_GCC_VERSION(2,5)
213	#define ecb_inline static __inline__	286	#define ecb_inline static __inline__
214	#elif ECB_C99	287	#elif ECB_C99
215	#define ecb_inline static inline	288	#define ecb_inline static inline
…		…
232	#define ECB_STRINGIFY_(a) # a	305	#define ECB_STRINGIFY_(a) # a
233	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	306	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
234		307
235	#define ecb_function_ ecb_inline	308	#define ecb_function_ ecb_inline
236		309
237	#if ECB_GCC_VERSION(3,1)	310	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
238	#define ecb_attribute(attrlist) __attribute__(attrlist)	311	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		312	#else
		313	#define ecb_attribute(attrlist)
		314	#endif
		315
		316	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
239	#define ecb_is_constant(expr) __builtin_constant_p (expr)	317	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		318	#else
		319	/* possible C11 impl for integral types
		320	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		321	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		322
		323	#define ecb_is_constant(expr) 0
		324	#endif
		325
		326	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
240	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	327	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		328	#else
		329	#define ecb_expect(expr,value) (expr)
		330	#endif
		331
		332	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
241	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	333	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
242	#else	334	#else
243	#define ecb_attribute(attrlist)
244	#define ecb_is_constant(expr) 0
245	#define ecb_expect(expr,value) (expr)
246	#define ecb_prefetch(addr,rw,locality)	335	#define ecb_prefetch(addr,rw,locality)
247	#endif	336	#endif
248		337
249	/* no emulation for ecb_decltype */	338	/* no emulation for ecb_decltype */
250	#if ECB_GCC_VERSION(4,5)	339	#if ECB_CPP11
		340	// older implementations might have problems with decltype(x)::type, work around it
		341	template<class T> struct ecb_decltype_t { typedef T type; };
251	#define ecb_decltype(x) __decltype(x)	342	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
252	#elif ECB_GCC_VERSION(3,0)	343	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
253	#define ecb_decltype(x) __typeof(x)	344	#define ecb_decltype(x) __typeof__ (x)
		345	#endif
		346
		347	#if _MSC_VER >= 1300
		348	#define ecb_deprecated __declspec (deprecated)
		349	#else
		350	#define ecb_deprecated ecb_attribute ((__deprecated__))
254	#endif	351	#endif
255		352
256	#define ecb_noinline ecb_attribute ((__noinline__))	353	#define ecb_noinline ecb_attribute ((__noinline__))
257	#define ecb_unused ecb_attribute ((__unused__))	354	#define ecb_unused ecb_attribute ((__unused__))
258	#define ecb_const ecb_attribute ((__const__))	355	#define ecb_const ecb_attribute ((__const__))
259	#define ecb_pure ecb_attribute ((__pure__))	356	#define ecb_pure ecb_attribute ((__pure__))
260		357
261	#if ECB_C11	358	/* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
		359	#if ECB_C11 \|\| __IBMC_NORETURN
		360	/* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
262	#define ecb_noreturn _Noreturn	361	#define ecb_noreturn _Noreturn
263	#else	362	#else
264	#define ecb_noreturn ecb_attribute ((__noreturn__))	363	#define ecb_noreturn ecb_attribute ((__noreturn__))
265	#endif	364	#endif
266		365
…		…
282	/* for compatibility to the rest of the world */	381	/* for compatibility to the rest of the world */
283	#define ecb_likely(expr) ecb_expect_true (expr)	382	#define ecb_likely(expr) ecb_expect_true (expr)
284	#define ecb_unlikely(expr) ecb_expect_false (expr)	383	#define ecb_unlikely(expr) ecb_expect_false (expr)
285		384
286	/* count trailing zero bits and count # of one bits */	385	/* count trailing zero bits and count # of one bits */
287	#if ECB_GCC_VERSION(3,4)	386	#if ECB_GCC_VERSION(3,4) \
		387	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		388	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		389	&& ECB_CLANG_BUILTIN(__builtin_popcount))
288	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	390	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
289	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	391	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
290	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	392	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
291	#define ecb_ctz32(x) __builtin_ctz (x)	393	#define ecb_ctz32(x) __builtin_ctz (x)
292	#define ecb_ctz64(x) __builtin_ctzll (x)	394	#define ecb_ctz64(x) __builtin_ctzll (x)
293	#define ecb_popcount32(x) __builtin_popcount (x)	395	#define ecb_popcount32(x) __builtin_popcount (x)
294	/* no popcountll */	396	/* no popcountll */
295	#else	397	#else
296	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	398	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
297	ecb_function_ int	399	ecb_function_ ecb_const int
298	ecb_ctz32 (uint32_t x)	400	ecb_ctz32 (uint32_t x)
299	{	401	{
300	int r = 0;	402	int r = 0;
301		403
302	x &= ~x + 1; /* this isolates the lowest bit */	404	x &= ~x + 1; /* this isolates the lowest bit */
…		…
316	#endif	418	#endif
317		419
318	return r;	420	return r;
319	}	421	}
320		422
321	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	423	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
322	ecb_function_ int	424	ecb_function_ ecb_const int
323	ecb_ctz64 (uint64_t x)	425	ecb_ctz64 (uint64_t x)
324	{	426	{
325	int shift = x & 0xffffffffU ? 0 : 32;	427	int shift = x & 0xffffffffU ? 0 : 32;
326	return ecb_ctz32 (x >> shift) + shift;	428	return ecb_ctz32 (x >> shift) + shift;
327	}	429	}
328		430
329	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	431	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
330	ecb_function_ int	432	ecb_function_ ecb_const int
331	ecb_popcount32 (uint32_t x)	433	ecb_popcount32 (uint32_t x)
332	{	434	{
333	x -= (x >> 1) & 0x55555555;	435	x -= (x >> 1) & 0x55555555;
334	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	436	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
335	x = ((x >> 4) + x) & 0x0f0f0f0f;	437	x = ((x >> 4) + x) & 0x0f0f0f0f;
336	x *= 0x01010101;	438	x *= 0x01010101;
337		439
338	return x >> 24;	440	return x >> 24;
339	}	441	}
340		442
341	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	443	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
342	ecb_function_ int ecb_ld32 (uint32_t x)	444	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
343	{	445	{
344	int r = 0;	446	int r = 0;
345		447
346	if (x >> 16) { x >>= 16; r += 16; }	448	if (x >> 16) { x >>= 16; r += 16; }
347	if (x >> 8) { x >>= 8; r += 8; }	449	if (x >> 8) { x >>= 8; r += 8; }
…		…
350	if (x >> 1) { r += 1; }	452	if (x >> 1) { r += 1; }
351		453
352	return r;	454	return r;
353	}	455	}
354		456
355	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
356	ecb_function_ int ecb_ld64 (uint64_t x)	458	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
357	{	459	{
358	int r = 0;	460	int r = 0;
359		461
360	if (x >> 32) { x >>= 32; r += 32; }	462	if (x >> 32) { x >>= 32; r += 32; }
361		463
362	return r + ecb_ld32 (x);	464	return r + ecb_ld32 (x);
363	}	465	}
364	#endif	466	#endif
365		467
366	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	468	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
367	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	469	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
368	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	470	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
369	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	471	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
370		472
371	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	473	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
372	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	474	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
373	{	475	{
374	return ( (x * 0x0802U & 0x22110U)	476	return ( (x * 0x0802U & 0x22110U)
375	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	477	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
376	}	478	}
377		479
378	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	480	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
379	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	481	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
380	{	482	{
381	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	483	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
382	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	484	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
383	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	485	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
384	x = ( x >> 8 ) \| ( x << 8);	486	x = ( x >> 8 ) \| ( x << 8);
385		487
386	return x;	488	return x;
387	}	489	}
388		490
389	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	491	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
390	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	492	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
391	{	493	{
392	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	494	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
393	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	495	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
394	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	496	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
395	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	497	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
398	return x;	500	return x;
399	}	501	}
400		502
401	/* popcount64 is only available on 64 bit cpus as gcc builtin */	503	/* popcount64 is only available on 64 bit cpus as gcc builtin */
402	/* so for this version we are lazy */	504	/* so for this version we are lazy */
403	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	505	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
404	ecb_function_ int	506	ecb_function_ ecb_const int
405	ecb_popcount64 (uint64_t x)	507	ecb_popcount64 (uint64_t x)
406	{	508	{
407	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	509	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
408	}	510	}
409		511
410	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	512	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
411	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	513	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
412	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	514	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
413	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	515	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
414	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	516	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
415	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	517	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
416	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	518	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
417	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	519	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
418		520
419	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	521	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
420	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	522	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
421	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	523	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
422	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	524	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
423	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	525	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
424	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	526	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
425	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	527	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
426	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	528	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
427		529
428	#if ECB_GCC_VERSION(4,3)	530	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
429	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	531	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
430	#define ecb_bswap32(x) __builtin_bswap32 (x)	532	#define ecb_bswap32(x) __builtin_bswap32 (x)
431	#define ecb_bswap64(x) __builtin_bswap64 (x)	533	#define ecb_bswap64(x) __builtin_bswap64 (x)
432	#else	534	#else
433	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	535	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
434	ecb_function_ uint16_t	536	ecb_function_ ecb_const uint16_t
435	ecb_bswap16 (uint16_t x)	537	ecb_bswap16 (uint16_t x)
436	{	538	{
437	return ecb_rotl16 (x, 8);	539	return ecb_rotl16 (x, 8);
438	}	540	}
439		541
440	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	542	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
441	ecb_function_ uint32_t	543	ecb_function_ ecb_const uint32_t
442	ecb_bswap32 (uint32_t x)	544	ecb_bswap32 (uint32_t x)
443	{	545	{
444	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	546	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
445	}	547	}
446		548
447	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	549	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
448	ecb_function_ uint64_t	550	ecb_function_ ecb_const uint64_t
449	ecb_bswap64 (uint64_t x)	551	ecb_bswap64 (uint64_t x)
450	{	552	{
451	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	553	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
452	}	554	}
453	#endif	555	#endif
454		556
455	#if ECB_GCC_VERSION(4,5)	557	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
456	#define ecb_unreachable() __builtin_unreachable ()	558	#define ecb_unreachable() __builtin_unreachable ()
457	#else	559	#else
458	/* this seems to work fine, but gcc always emits a warning for it :/ */	560	/* this seems to work fine, but gcc always emits a warning for it :/ */
459	ecb_inline void ecb_unreachable (void) ecb_noreturn;	561	ecb_inline ecb_noreturn void ecb_unreachable (void);
460	ecb_inline void ecb_unreachable (void) { }	562	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
461	#endif	563	#endif
462		564
463	/* try to tell the compiler that some condition is definitely true */	565	/* try to tell the compiler that some condition is definitely true */
464	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	566	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
465		567
466	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	568	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
467	ecb_inline unsigned char	569	ecb_inline ecb_const unsigned char
468	ecb_byteorder_helper (void)	570	ecb_byteorder_helper (void)
469	{	571	{
470	/* the union code still generates code under pressure in gcc, */	572	/* the union code still generates code under pressure in gcc, */
471	/* but less than using pointers, and always seem to */	573	/* but less than using pointers, and always seems to */
472	/* successfully return a constant. */	574	/* successfully return a constant. */
473	/* the reason why we have this horrible preprocessor mess */	575	/* the reason why we have this horrible preprocessor mess */
474	/* is to avoid it in all cases, at least on common architectures */	576	/* is to avoid it in all cases, at least on common architectures */
475	/* and yes, gcc defines __BYTE_ORDER__, g++ does not */	577	/* or when using a recent enough gcc version (>= 4.6) */
476	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	578	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64
477	return 0x44;	579	return 0x44;
478	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	580	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
479	return 0x44;	581	return 0x44;
480	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	582	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
481	retrurn 0x11;	583	return 0x11;
482	#else	584	#else
483	union	585	union
484	{	586	{
485	uint32_t i;	587	uint32_t i;
486	uint8_t c;	588	uint8_t c;
487	} u = { 0x11223344 };	589	} u = { 0x11223344 };
488	return u.c;	590	return u.c;
489	#endif	591	#endif
490	}	592	}
491		593
492	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	594	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
493	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	595	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
494	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	596	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
495	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	597	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
496		598
497	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	599	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
498	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	600	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
499	#else	601	#else
500	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	602	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
501	#endif	603	#endif
502		604
503	#if __cplusplus	605	#if ECB_CPP
504	template<typename T>	606	template<typename T>
505	static inline T ecb_div_rd (T val, T div)	607	static inline T ecb_div_rd (T val, T div)
506	{	608	{
507	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	609	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
508	}	610	}
…		…
525	}	627	}
526	#else	628	#else
527	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	629	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
528	#endif	630	#endif
529		631
		632	/*******************************************************************************/
		633	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
		634
		635	/* basically, everything uses "ieee pure-endian" floating point numbers */
		636	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
		637	#if 0 \
		638	\|\| __i386 \|\| __i386__ \
		639	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \
		640	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
		641	\|\| defined __s390__ \|\| defined __s390x__ \
		642	\|\| defined __mips__ \
		643	\|\| defined __alpha__ \
		644	\|\| defined __hppa__ \
		645	\|\| defined __ia64__ \
		646	\|\| defined __m68k__ \
		647	\|\| defined __m88k__ \
		648	\|\| defined __sh__ \
		649	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64 \
		650	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		651	\|\| defined __aarch64__
		652	#define ECB_STDFP 1
		653	#include <string.h> /* for memcpy */
		654	#else
		655	#define ECB_STDFP 0
		656	#endif
		657
		658	#ifndef ECB_NO_LIBM
		659
		660	#include <math.h> /* for frexp, ldexp, INFINITY, NAN */
		661
		662	/* only the oldest of old doesn't have this one. solaris. */
		663	#ifdef INFINITY
		664	#define ECB_INFINITY INFINITY
		665	#else
		666	#define ECB_INFINITY HUGE_VAL
530	#endif	667	#endif
531		668
		669	#ifdef NAN
		670	#define ECB_NAN NAN
		671	#else
		672	#define ECB_NAN ECB_INFINITY
		673	#endif
		674
		675	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
		676	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
		677	#else
		678	#define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
		679	#endif
		680
		681	/* converts an ieee half/binary16 to a float */
		682	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		683	ecb_function_ ecb_const float
		684	ecb_binary16_to_float (uint16_t x)
		685	{
		686	int e = (x >> 10) & 0x1f;
		687	int m = x & 0x3ff;
		688	float r;
		689
		690	if (!e ) r = ecb_ldexpf (m , -24);
		691	else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
		692	else if (m ) r = ECB_NAN;
		693	else r = ECB_INFINITY;
		694
		695	return x & 0x8000 ? -r : r;
		696	}
		697
		698	/* convert a float to ieee single/binary32 */
		699	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
		700	ecb_function_ ecb_const uint32_t
		701	ecb_float_to_binary32 (float x)
		702	{
		703	uint32_t r;
		704
		705	#if ECB_STDFP
		706	memcpy (&r, &x, 4);
		707	#else
		708	/* slow emulation, works for anything but -0 */
		709	uint32_t m;
		710	int e;
		711
		712	if (x == 0e0f ) return 0x00000000U;
		713	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
		714	if (x < -3.40282346638528860e+38f) return 0xff800000U;
		715	if (x != x ) return 0x7fbfffffU;
		716
		717	m = frexpf (x, &e) * 0x1000000U;
		718
		719	r = m & 0x80000000U;
		720
		721	if (r)
		722	m = -m;
		723
		724	if (e <= -126)
		725	{
		726	m &= 0xffffffU;
		727	m >>= (-125 - e);
		728	e = -126;
		729	}
		730
		731	r \|= (e + 126) << 23;
		732	r \|= m & 0x7fffffU;
		733	#endif
		734
		735	return r;
		736	}
		737
		738	/* converts an ieee single/binary32 to a float */
		739	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
		740	ecb_function_ ecb_const float
		741	ecb_binary32_to_float (uint32_t x)
		742	{
		743	float r;
		744
		745	#if ECB_STDFP
		746	memcpy (&r, &x, 4);
		747	#else
		748	/* emulation, only works for normals and subnormals and +0 */
		749	int neg = x >> 31;
		750	int e = (x >> 23) & 0xffU;
		751
		752	x &= 0x7fffffU;
		753
		754	if (e)
		755	x \|= 0x800000U;
		756	else
		757	e = 1;
		758
		759	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
		760	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
		761
		762	r = neg ? -r : r;
		763	#endif
		764
		765	return r;
		766	}
		767
		768	/* convert a double to ieee double/binary64 */
		769	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
		770	ecb_function_ ecb_const uint64_t
		771	ecb_double_to_binary64 (double x)
		772	{
		773	uint64_t r;
		774
		775	#if ECB_STDFP
		776	memcpy (&r, &x, 8);
		777	#else
		778	/* slow emulation, works for anything but -0 */
		779	uint64_t m;
		780	int e;
		781
		782	if (x == 0e0 ) return 0x0000000000000000U;
		783	if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
		784	if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
		785	if (x != x ) return 0X7ff7ffffffffffffU;
		786
		787	m = frexp (x, &e) * 0x20000000000000U;
		788
		789	r = m & 0x8000000000000000;;
		790
		791	if (r)
		792	m = -m;
		793
		794	if (e <= -1022)
		795	{
		796	m &= 0x1fffffffffffffU;
		797	m >>= (-1021 - e);
		798	e = -1022;
		799	}
		800
		801	r \|= ((uint64_t)(e + 1022)) << 52;
		802	r \|= m & 0xfffffffffffffU;
		803	#endif
		804
		805	return r;
		806	}
		807
		808	/* converts an ieee double/binary64 to a double */
		809	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
		810	ecb_function_ ecb_const double
		811	ecb_binary64_to_double (uint64_t x)
		812	{
		813	double r;
		814
		815	#if ECB_STDFP
		816	memcpy (&r, &x, 8);
		817	#else
		818	/* emulation, only works for normals and subnormals and +0 */
		819	int neg = x >> 63;
		820	int e = (x >> 52) & 0x7ffU;
		821
		822	x &= 0xfffffffffffffU;
		823
		824	if (e)
		825	x \|= 0x10000000000000U;
		826	else
		827	e = 1;
		828
		829	/* we distrust ldexp a bit and do the 2*-53 scaling by an extra multiply /
		830	r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
		831
		832	r = neg ? -r : r;
		833	#endif
		834
		835	return r;
		836	}
		837
		838	#endif
		839
		840	#endif
		841

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Comparing libeio/ecb.h (file contents): Revision 1.14 by root, Sun Jun 17 17:07:25 2012 UTC vs. Revision 1.23 by root, Wed Feb 11 19:32:36 2015 UTC

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Comparing libeio/ecb.h (file contents):
Revision 1.14 by root, Sun Jun 17 17:07:25 2012 UTC vs.
Revision 1.23 by root, Wed Feb 11 19:32:36 2015 UTC