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

Comparing libecb/ecb.h (file contents):
Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs.
Revision 1.170 by root, Sat Nov 21 21:14:55 2015 UTC

…		…
1	/*	1	/*
2	* libecb - http://software.schmorp.de/pkg/libecb	2	* libecb - http://software.schmorp.de/pkg/libecb
3	*	3	*
4	* Copyright (©) 2009-2013 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 0x00010003	45	#define ECB_VERSION 0x00010005
35		46
36	#ifdef _WIN32	47	#ifdef _WIN32
37	typedef signed char int8_t;	48	typedef signed char int8_t;
38	typedef unsigned char uint8_t;	49	typedef unsigned char uint8_t;
39	typedef signed short int16_t;	50	typedef signed short int16_t;
…		…
63	#else	74	#else
64	#define ECB_PTRSIZE 4	75	#define ECB_PTRSIZE 4
65	#endif	76	#endif
66	#endif	77	#endif
67		78
		79	#define ECB_GCC_AMD64 (__amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__)
		80	#define ECB_MSVC_AMD64 (_M_AMD64 \|\| _M_X64)
		81
68	/* work around x32 idiocy by defining proper macros */	82	/* work around x32 idiocy by defining proper macros */
69	#if __amd64 \|\| __x86_64 \|\| _M_AMD64 \|\| _M_X64	83	#if ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
70	#if _ILP32	84	#if _ILP32
71	#define ECB_AMD64_X32 1	85	#define ECB_AMD64_X32 1
72	#else	86	#else
73	#define ECB_AMD64 1	87	#define ECB_AMD64 1
74	#endif	88	#endif
…		…
79	* causing enormous grief in return for some better fake benchmark numbers.	93	* causing enormous grief in return for some better fake benchmark numbers.
80	* or so.	94	* or so.
81	* we try to detect these and simply assume they are not gcc - if they have	95	* we try to detect these and simply assume they are not gcc - if they have
82	* an issue with that they should have done it right in the first place.	96	* an issue with that they should have done it right in the first place.
83	*/	97	*/
84	#ifndef ECB_GCC_VERSION
85	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__	98	#if !defined __GNUC_MINOR__ \|\| defined __INTEL_COMPILER \|\| defined __SUNPRO_C \|\| defined __SUNPRO_CC \|\| defined __llvm__ \|\| defined __clang__
86	#define ECB_GCC_VERSION(major,minor) 0	99	#define ECB_GCC_VERSION(major,minor) 0
87	#else	100	#else
88	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))	101	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
89	#endif	102	#endif
90	#endif
91		103
92	#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */	104	#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) \|\| (__clang_major__ == (major) && __clang_minor__ >= (minor)))
93	#define ECB_C99 (__STDC_VERSION__ >= 199901L)	105
94	#define ECB_C11 (__STDC_VERSION__ >= 201112L)	106	#if __clang__ && defined __has_builtin
		107	#define ECB_CLANG_BUILTIN(x) __has_builtin (x)
		108	#else
		109	#define ECB_CLANG_BUILTIN(x) 0
		110	#endif
		111
		112	#if __clang__ && defined __has_extension
		113	#define ECB_CLANG_EXTENSION(x) __has_extension (x)
		114	#else
		115	#define ECB_CLANG_EXTENSION(x) 0
		116	#endif
		117
95	#define ECB_CPP (__cplusplus+0)	118	#define ECB_CPP (__cplusplus+0)
96	#define ECB_CPP11 (__cplusplus >= 201103L)	119	#define ECB_CPP11 (__cplusplus >= 201103L)
		120
		121	#if ECB_CPP
		122	#define ECB_C 0
		123	#define ECB_STDC_VERSION 0
		124	#else
		125	#define ECB_C 1
		126	#define ECB_STDC_VERSION __STDC_VERSION__
		127	#endif
		128
		129	#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
		130	#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
97		131
98	#if ECB_CPP	132	#if ECB_CPP
99	#define ECB_EXTERN_C extern "C"	133	#define ECB_EXTERN_C extern "C"
100	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {	134	#define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101	#define ECB_EXTERN_C_END }	135	#define ECB_EXTERN_C_END }
…		…
114	#define ECB_NO_SMP 1	148	#define ECB_NO_SMP 1
115	#endif	149	#endif
116		150
117	#if ECB_NO_SMP	151	#if ECB_NO_SMP
118	#define ECB_MEMORY_FENCE do { } while (0)	152	#define ECB_MEMORY_FENCE do { } while (0)
		153	#endif
		154
		155	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
		156	#if __xlC__ && ECB_CPP
		157	#include <builtins.h>
119	#endif	158	#endif
120		159
121	#ifndef ECB_MEMORY_FENCE	160	#ifndef ECB_MEMORY_FENCE
122	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110	161	#if ECB_GCC_VERSION(2,5) \|\| defined __INTEL_COMPILER \|\| (__llvm__ && __GNUC__) \|\| __SUNPRO_C >= 0x5110 \|\| __SUNPRO_CC >= 0x5110
123	#if __i386 \|\| __i386__	162	#if __i386 \|\| __i386__
124	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")	163	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
125	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	164	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
126	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	165	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
127	#elif __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__	166	#elif ECB_GCC_AMD64
128	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")	167	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
129	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")	168	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
130	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")	169	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
131	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__	170	#elif __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__
132	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")	171	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
…		…
134	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__	173	\|\| defined __ARM_ARCH_6K__ \|\| defined __ARM_ARCH_6ZK__
135	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")	174	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
136	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \	175	#elif defined __ARM_ARCH_7__ \|\| defined __ARM_ARCH_7A__ \
137	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__	176	\|\| defined __ARM_ARCH_7M__ \|\| defined __ARM_ARCH_7R__
138	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")	177	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
		178	#elif __aarch64__
		179	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
139	#elif (__sparc \|\| __sparc__) && !__sparcv8	180	#elif (__sparc \|\| __sparc__) && !(__sparc_v8__ \|\| defined __sparcv8)
140	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")	181	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad \| #StoreStore \| #StoreLoad" : : : "memory")
141	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")	182	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore \| #LoadLoad" : : : "memory")
142	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")	183	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore \| #StoreStore")
143	#elif defined __s390__ \|\| defined __s390x__	184	#elif defined __s390__ \|\| defined __s390x__
144	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")	185	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
…		…
165		206
166	#ifndef ECB_MEMORY_FENCE	207	#ifndef ECB_MEMORY_FENCE
167	#if ECB_GCC_VERSION(4,7)	208	#if ECB_GCC_VERSION(4,7)
168	/* see comment below (stdatomic.h) about the C11 memory model. */	209	/* see comment below (stdatomic.h) about the C11 memory model. */
169	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)	210	#define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
		211	#define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
		212	#define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
170		213
171	/* The __has_feature syntax from clang is so misdesigned that we cannot use it	214	#elif ECB_CLANG_EXTENSION(c_atomic)
172	* without risking compile time errors with other compilers. We could
173	* define our own ecb_clang_has_feature, but I just can't be bothered to work
174	* around this shit time and again.
175	* #elif defined __clang && __has_feature (cxx_atomic)
176	* // see comment below (stdatomic.h) about the C11 memory model.	215	/* see comment below (stdatomic.h) about the C11 memory model. */
177	* #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)	216	#define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
178	*/	217	#define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
		218	#define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
179		219
180	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__	220	#elif ECB_GCC_VERSION(4,4) \|\| defined __INTEL_COMPILER \|\| defined __clang__
181	#define ECB_MEMORY_FENCE __sync_synchronize ()	221	#define ECB_MEMORY_FENCE __sync_synchronize ()
182	#elif _MSC_VER >= 1500 /* VC++ 2008 */	222	#elif _MSC_VER >= 1500 /* VC++ 2008 */
183	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */	223	/* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
…		…
212	/* any fence other than seq_cst, which isn't very efficient for us. */	252	/* any fence other than seq_cst, which isn't very efficient for us. */
213	/* Why that is, we don't know - either the C11 memory model is quite useless */	253	/* Why that is, we don't know - either the C11 memory model is quite useless */
214	/* for most usages, or gcc and clang have a bug */	254	/* for most usages, or gcc and clang have a bug */
215	/* I currently lean towards the latter, and inefficiently implement */	255	/* I currently lean towards the latter, and inefficiently implement */
216	/* all three of ecb's fences as a seq_cst fence */	256	/* all three of ecb's fences as a seq_cst fence */
		257	/* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
		258	/* for all __atomic_thread_fence's except seq_cst */
217	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)	259	#define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
218	#endif	260	#endif
219	#endif	261	#endif
220		262
221	#ifndef ECB_MEMORY_FENCE	263	#ifndef ECB_MEMORY_FENCE
…		…
244	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE	286	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
245	#endif	287	#endif
246		288
247	/*****************************************************************************/	289	/*****************************************************************************/
248		290
249	#if __cplusplus	291	#if ECB_CPP
250	#define ecb_inline static inline	292	#define ecb_inline static inline
251	#elif ECB_GCC_VERSION(2,5)	293	#elif ECB_GCC_VERSION(2,5)
252	#define ecb_inline static __inline__	294	#define ecb_inline static __inline__
253	#elif ECB_C99	295	#elif ECB_C99
254	#define ecb_inline static inline	296	#define ecb_inline static inline
…		…
268		310
269	#define ECB_CONCAT_(a, b) a ## b	311	#define ECB_CONCAT_(a, b) a ## b
270	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)	312	#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
271	#define ECB_STRINGIFY_(a) # a	313	#define ECB_STRINGIFY_(a) # a
272	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)	314	#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
		315	#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
273		316
274	#define ecb_function_ ecb_inline	317	#define ecb_function_ ecb_inline
275		318
276	#if ECB_GCC_VERSION(3,1)	319	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_VERSION(2,8)
277	#define ecb_attribute(attrlist) __attribute__(attrlist)	320	#define ecb_attribute(attrlist) __attribute__ (attrlist)
		321	#else
		322	#define ecb_attribute(attrlist)
		323	#endif
		324
		325	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_constant_p)
278	#define ecb_is_constant(expr) __builtin_constant_p (expr)	326	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		327	#else
		328	/* possible C11 impl for integral types
		329	typedef struct ecb_is_constant_struct ecb_is_constant_struct;
		330	#define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct )0 : (void )((expr) - (expr)), ecb_is_constant_struct : 0, default: 1)) /
		331
		332	#define ecb_is_constant(expr) 0
		333	#endif
		334
		335	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_expect)
279	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))	336	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		337	#else
		338	#define ecb_expect(expr,value) (expr)
		339	#endif
		340
		341	#if ECB_GCC_VERSION(3,1) \|\| ECB_CLANG_BUILTIN(__builtin_prefetch)
280	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)	342	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
281	#else	343	#else
282	#define ecb_attribute(attrlist)
283	#define ecb_is_constant(expr) 0
284	#define ecb_expect(expr,value) (expr)
285	#define ecb_prefetch(addr,rw,locality)	344	#define ecb_prefetch(addr,rw,locality)
286	#endif	345	#endif
287		346
288	/* no emulation for ecb_decltype */	347	/* no emulation for ecb_decltype */
289	#if ECB_GCC_VERSION(4,5)	348	#if ECB_CPP11
		349	// older implementations might have problems with decltype(x)::type, work around it
		350	template<class T> struct ecb_decltype_t { typedef T type; };
290	#define ecb_decltype(x) __decltype(x)	351	#define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
291	#elif ECB_GCC_VERSION(3,0)	352	#elif ECB_GCC_VERSION(3,0) \|\| ECB_CLANG_VERSION(2,8)
292	#define ecb_decltype(x) __typeof(x)	353	#define ecb_decltype(x) __typeof__ (x)
293	#endif	354	#endif
294		355
		356	#if _MSC_VER >= 1300
		357	#define ecb_deprecated __declspec (deprecated)
		358	#else
		359	#define ecb_deprecated ecb_attribute ((__deprecated__))
		360	#endif
		361
		362	#if _MSC_VER >= 1500
		363	#define ecb_deprecated_message(msg) __declspec (deprecated (msg))
		364	#elif ECB_GCC_VERSION(4,5)
		365	#define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
		366	#else
		367	#define ecb_deprecated_message(msg) ecb_deprecated
		368	#endif
		369
		370	#if _MSC_VER >= 1400
		371	#define ecb_noinline __declspec (noinline)
		372	#else
295	#define ecb_noinline ecb_attribute ((__noinline__))	373	#define ecb_noinline ecb_attribute ((__noinline__))
		374	#endif
		375
296	#define ecb_unused ecb_attribute ((__unused__))	376	#define ecb_unused ecb_attribute ((__unused__))
297	#define ecb_const ecb_attribute ((__const__))	377	#define ecb_const ecb_attribute ((__const__))
298	#define ecb_pure ecb_attribute ((__pure__))	378	#define ecb_pure ecb_attribute ((__pure__))
299		379
300	#if ECB_C11	380	#if ECB_C11 \|\| __IBMC_NORETURN
		381	/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
301	#define ecb_noreturn _Noreturn	382	#define ecb_noreturn _Noreturn
		383	#elif ECB_CPP11
		384	#define ecb_noreturn [[noreturn]]
		385	#elif _MSC_VER >= 1200
		386	/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
		387	#define ecb_noreturn __declspec (noreturn)
302	#else	388	#else
303	#define ecb_noreturn ecb_attribute ((__noreturn__))	389	#define ecb_noreturn ecb_attribute ((__noreturn__))
304	#endif	390	#endif
305		391
306	#if ECB_GCC_VERSION(4,3)	392	#if ECB_GCC_VERSION(4,3)
…		…
321	/* for compatibility to the rest of the world */	407	/* for compatibility to the rest of the world */
322	#define ecb_likely(expr) ecb_expect_true (expr)	408	#define ecb_likely(expr) ecb_expect_true (expr)
323	#define ecb_unlikely(expr) ecb_expect_false (expr)	409	#define ecb_unlikely(expr) ecb_expect_false (expr)
324		410
325	/* count trailing zero bits and count # of one bits */	411	/* count trailing zero bits and count # of one bits */
326	#if ECB_GCC_VERSION(3,4)	412	#if ECB_GCC_VERSION(3,4) \
		413	\|\| (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
		414	&& ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
		415	&& ECB_CLANG_BUILTIN(__builtin_popcount))
327	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */	416	/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
328	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)	417	#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
329	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)	418	#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
330	#define ecb_ctz32(x) __builtin_ctz (x)	419	#define ecb_ctz32(x) __builtin_ctz (x)
331	#define ecb_ctz64(x) __builtin_ctzll (x)	420	#define ecb_ctz64(x) __builtin_ctzll (x)
332	#define ecb_popcount32(x) __builtin_popcount (x)	421	#define ecb_popcount32(x) __builtin_popcount (x)
333	/* no popcountll */	422	/* no popcountll */
334	#else	423	#else
335	ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;	424	ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
336	ecb_function_ int	425	ecb_function_ ecb_const int
337	ecb_ctz32 (uint32_t x)	426	ecb_ctz32 (uint32_t x)
338	{	427	{
339	int r = 0;	428	int r = 0;
340		429
341	x &= ~x + 1; /* this isolates the lowest bit */	430	x &= ~x + 1; /* this isolates the lowest bit */
…		…
355	#endif	444	#endif
356		445
357	return r;	446	return r;
358	}	447	}
359		448
360	ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;	449	ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
361	ecb_function_ int	450	ecb_function_ ecb_const int
362	ecb_ctz64 (uint64_t x)	451	ecb_ctz64 (uint64_t x)
363	{	452	{
364	int shift = x & 0xffffffffU ? 0 : 32;	453	int shift = x & 0xffffffff ? 0 : 32;
365	return ecb_ctz32 (x >> shift) + shift;	454	return ecb_ctz32 (x >> shift) + shift;
366	}	455	}
367		456
368	ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;	457	ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
369	ecb_function_ int	458	ecb_function_ ecb_const int
370	ecb_popcount32 (uint32_t x)	459	ecb_popcount32 (uint32_t x)
371	{	460	{
372	x -= (x >> 1) & 0x55555555;	461	x -= (x >> 1) & 0x55555555;
373	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);	462	x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
374	x = ((x >> 4) + x) & 0x0f0f0f0f;	463	x = ((x >> 4) + x) & 0x0f0f0f0f;
375	x *= 0x01010101;	464	x *= 0x01010101;
376		465
377	return x >> 24;	466	return x >> 24;
378	}	467	}
379		468
380	ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;	469	ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
381	ecb_function_ int ecb_ld32 (uint32_t x)	470	ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
382	{	471	{
383	int r = 0;	472	int r = 0;
384		473
385	if (x >> 16) { x >>= 16; r += 16; }	474	if (x >> 16) { x >>= 16; r += 16; }
386	if (x >> 8) { x >>= 8; r += 8; }	475	if (x >> 8) { x >>= 8; r += 8; }
…		…
389	if (x >> 1) { r += 1; }	478	if (x >> 1) { r += 1; }
390		479
391	return r;	480	return r;
392	}	481	}
393		482
394	ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;	483	ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
395	ecb_function_ int ecb_ld64 (uint64_t x)	484	ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
396	{	485	{
397	int r = 0;	486	int r = 0;
398		487
399	if (x >> 32) { x >>= 32; r += 32; }	488	if (x >> 32) { x >>= 32; r += 32; }
400		489
401	return r + ecb_ld32 (x);	490	return r + ecb_ld32 (x);
402	}	491	}
403	#endif	492	#endif
404		493
405	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;	494	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
406	ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }	495	ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
407	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;	496	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
408	ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }	497	ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
409		498
410	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;	499	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
411	ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)	500	ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
412	{	501	{
413	return ( (x * 0x0802U & 0x22110U)	502	return ( (x * 0x0802U & 0x22110U)
414	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;	503	\| (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
415	}	504	}
416		505
417	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;	506	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
418	ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)	507	ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
419	{	508	{
420	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);	509	x = ((x >> 1) & 0x5555) \| ((x & 0x5555) << 1);
421	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);	510	x = ((x >> 2) & 0x3333) \| ((x & 0x3333) << 2);
422	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);	511	x = ((x >> 4) & 0x0f0f) \| ((x & 0x0f0f) << 4);
423	x = ( x >> 8 ) \| ( x << 8);	512	x = ( x >> 8 ) \| ( x << 8);
424		513
425	return x;	514	return x;
426	}	515	}
427		516
428	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;	517	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
429	ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)	518	ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
430	{	519	{
431	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);	520	x = ((x >> 1) & 0x55555555) \| ((x & 0x55555555) << 1);
432	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);	521	x = ((x >> 2) & 0x33333333) \| ((x & 0x33333333) << 2);
433	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);	522	x = ((x >> 4) & 0x0f0f0f0f) \| ((x & 0x0f0f0f0f) << 4);
434	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);	523	x = ((x >> 8) & 0x00ff00ff) \| ((x & 0x00ff00ff) << 8);
…		…
437	return x;	526	return x;
438	}	527	}
439		528
440	/* popcount64 is only available on 64 bit cpus as gcc builtin */	529	/* popcount64 is only available on 64 bit cpus as gcc builtin */
441	/* so for this version we are lazy */	530	/* so for this version we are lazy */
442	ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;	531	ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
443	ecb_function_ int	532	ecb_function_ ecb_const int
444	ecb_popcount64 (uint64_t x)	533	ecb_popcount64 (uint64_t x)
445	{	534	{
446	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);	535	return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
447	}	536	}
448		537
449	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;	538	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
450	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;	539	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
451	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;	540	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
452	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;	541	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
453	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;	542	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
454	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;	543	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
455	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;	544	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
456	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;	545	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
457		546
458	ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }	547	ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) \| (x << count); }
459	ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }	548	ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) \| (x >> count); }
460	ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }	549	ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) \| (x << count); }
461	ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }	550	ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) \| (x >> count); }
462	ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }	551	ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) \| (x << count); }
463	ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }	552	ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) \| (x >> count); }
464	ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }	553	ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) \| (x << count); }
465	ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }	554	ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) \| (x >> count); }
466		555
467	#if ECB_GCC_VERSION(4,3)	556	#if ECB_GCC_VERSION(4,3) \|\| (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
		557	#if ECB_GCC_VERSION(4,8) \|\| ECB_CLANG_BUILTIN(__builtin_bswap16)
		558	#define ecb_bswap16(x) __builtin_bswap16 (x)
		559	#else
468	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)	560	#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
		561	#endif
469	#define ecb_bswap32(x) __builtin_bswap32 (x)	562	#define ecb_bswap32(x) __builtin_bswap32 (x)
470	#define ecb_bswap64(x) __builtin_bswap64 (x)	563	#define ecb_bswap64(x) __builtin_bswap64 (x)
		564	#elif _MSC_VER
		565	#include <stdlib.h>
		566	#define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
		567	#define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
		568	#define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
471	#else	569	#else
472	ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;	570	ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
473	ecb_function_ uint16_t	571	ecb_function_ ecb_const uint16_t
474	ecb_bswap16 (uint16_t x)	572	ecb_bswap16 (uint16_t x)
475	{	573	{
476	return ecb_rotl16 (x, 8);	574	return ecb_rotl16 (x, 8);
477	}	575	}
478		576
479	ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;	577	ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
480	ecb_function_ uint32_t	578	ecb_function_ ecb_const uint32_t
481	ecb_bswap32 (uint32_t x)	579	ecb_bswap32 (uint32_t x)
482	{	580	{
483	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);	581	return (((uint32_t)ecb_bswap16 (x)) << 16) \| ecb_bswap16 (x >> 16);
484	}	582	}
485		583
486	ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;	584	ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
487	ecb_function_ uint64_t	585	ecb_function_ ecb_const uint64_t
488	ecb_bswap64 (uint64_t x)	586	ecb_bswap64 (uint64_t x)
489	{	587	{
490	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);	588	return (((uint64_t)ecb_bswap32 (x)) << 32) \| ecb_bswap32 (x >> 32);
491	}	589	}
492	#endif	590	#endif
493		591
494	#if ECB_GCC_VERSION(4,5)	592	#if ECB_GCC_VERSION(4,5) \|\| ECB_CLANG_BUILTIN(__builtin_unreachable)
495	#define ecb_unreachable() __builtin_unreachable ()	593	#define ecb_unreachable() __builtin_unreachable ()
496	#else	594	#else
497	/* this seems to work fine, but gcc always emits a warning for it :/ */	595	/* this seems to work fine, but gcc always emits a warning for it :/ */
498	ecb_inline void ecb_unreachable (void) ecb_noreturn;	596	ecb_inline ecb_noreturn void ecb_unreachable (void);
499	ecb_inline void ecb_unreachable (void) { }	597	ecb_inline ecb_noreturn void ecb_unreachable (void) { }
500	#endif	598	#endif
501		599
502	/* try to tell the compiler that some condition is definitely true */	600	/* try to tell the compiler that some condition is definitely true */
503	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0	601	#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
504		602
505	ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;	603	ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
506	ecb_inline unsigned char	604	ecb_inline ecb_const unsigned char
507	ecb_byteorder_helper (void)	605	ecb_byteorder_helper (void)
508	{	606	{
509	/* the union code still generates code under pressure in gcc, */	607	/* the union code still generates code under pressure in gcc, */
510	/* but less than using pointers, and always seems to */	608	/* but less than using pointers, and always seems to */
511	/* successfully return a constant. */	609	/* successfully return a constant. */
512	/* the reason why we have this horrible preprocessor mess */	610	/* the reason why we have this horrible preprocessor mess */
513	/* is to avoid it in all cases, at least on common architectures */	611	/* is to avoid it in all cases, at least on common architectures */
514	/* or when using a recent enough gcc version (>= 4.6) */	612	/* or when using a recent enough gcc version (>= 4.6) */
515	#if __i386 \|\| __i386__ \|\| _M_X86 \|\| __amd64 \|\| __amd64__ \|\| _M_X64	613	#if ((__i386 \|\| __i386__) && !__VOS__) \|\| _M_IX86 \|\| ECB_GCC_AMD64 \|\| ECB_MSVC_AMD64
516	return 0x44;	614	return 0x44;
517	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__	615	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
518	return 0x44;	616	return 0x44;
519	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__	617	#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
520	return 0x11;	618	return 0x11;
…		…
526	} u = { 0x11223344 };	624	} u = { 0x11223344 };
527	return u.c;	625	return u.c;
528	#endif	626	#endif
529	}	627	}
530		628
531	ecb_inline ecb_bool ecb_big_endian (void) ecb_const;	629	ecb_inline ecb_const ecb_bool ecb_big_endian (void);
532	ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }	630	ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
533	ecb_inline ecb_bool ecb_little_endian (void) ecb_const;	631	ecb_inline ecb_const ecb_bool ecb_little_endian (void);
534	ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }	632	ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
535		633
536	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99	634	#if ECB_GCC_VERSION(3,0) \|\| ECB_C99
537	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))	635	#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
538	#else	636	#else
539	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))	637	#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
540	#endif	638	#endif
541		639
542	#if __cplusplus	640	#if ECB_CPP
543	template<typename T>	641	template<typename T>
544	static inline T ecb_div_rd (T val, T div)	642	static inline T ecb_div_rd (T val, T div)
545	{	643	{
546	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;	644	return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
547	}	645	}
…		…
564	}	662	}
565	#else	663	#else
566	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))	664	#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
567	#endif	665	#endif
568		666
		667	ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
		668	ecb_function_ ecb_const uint32_t
		669	ecb_binary16_to_binary32 (uint32_t x)
		670	{
		671	unsigned int s = (x & 0x8000) << (31 - 15);
		672	int e = (x >> 10) & 0x001f;
		673	unsigned int m = x & 0x03ff;
		674
		675	if (ecb_expect_false (e == 31))
		676	/* infinity or NaN */
		677	e = 255 - (127 - 15);
		678	else if (ecb_expect_false (!e))
		679	{
		680	if (ecb_expect_true (!m))
		681	/* zero, handled by code below by forcing e to 0 */
		682	e = 0 - (127 - 15);
		683	else
		684	{
		685	/* subnormal, renormalise */
		686	unsigned int s = 10 - ecb_ld32 (m);
		687
		688	m = (m << s) & 0x3ff; /* mask implicit bit */
		689	e -= s - 1;
		690	}
		691	}
		692
		693	/* e and m now are normalised, or zero, (or inf or nan) */
		694	e += 127 - 15;
		695
		696	return s \| (e << 23) \| (m << (23 - 10));
		697	}
		698
		699	ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
		700	ecb_function_ ecb_const uint16_t
		701	ecb_binary32_to_binary16 (uint32_t x)
		702	{
		703	unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
		704	unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
		705	unsigned int m = x & 0x007fffff;
		706
		707	x &= 0x7fffffff;
		708
		709	/* if it's within range of binary16 normals, use fast path */
		710	if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
		711	{
		712	/* mantissa round-to-even */
		713	m += 0x00000fff + ((m >> (23 - 10)) & 1);
		714
		715	/* handle overflow */
		716	if (ecb_expect_false (m >= 0x00800000))
		717	{
		718	m >>= 1;
		719	e += 1;
		720	}
		721
		722	return s \| (e << 10) \| (m >> (23 - 10));
		723	}
		724
		725	/* handle large numbers and infinity */
		726	if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
		727	return s \| 0x7c00;
		728
		729	/* handle zero, subnormals and small numbers */
		730	if (ecb_expect_true (x < 0x38800000))
		731	{
		732	/* zero */
		733	if (ecb_expect_true (!x))
		734	return s;
		735
		736	/* handle subnormals */
		737
		738	/* too small, will be zero */
		739	if (e < (14 - 24)) /* might not be sharp, but is good enough */
		740	return s;
		741
		742	m \|= 0x00800000; /* make implicit bit explicit */
		743
		744	/* very tricky - we need to round to the nearest e (+10) bit value */
		745	{
		746	unsigned int bits = 14 - e;
		747	unsigned int half = (1 << (bits - 1)) - 1;
		748	unsigned int even = (m >> bits) & 1;
		749
		750	/* if this overflows, we will end up with a normalised number */
		751	m = (m + half + even) >> bits;
		752	}
		753
		754	return s \| m;
		755	}
		756
		757	/* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
		758	m >>= 13;
		759
		760	return s \| 0x7c00 \| m \| !m;
		761	}
		762
569	/*******************************************************************************/	763	/*******************************************************************************/
570	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */	764	/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
571		765
572	/* basically, everything uses "ieee pure-endian" floating point numbers */	766	/* basically, everything uses "ieee pure-endian" floating point numbers */
573	/* the only noteworthy exception is ancient armle, which uses order 43218765 */	767	/* the only noteworthy exception is ancient armle, which uses order 43218765 */
574	#if 0 \	768	#if 0 \
575	\|\| __i386 \|\| __i386__ \	769	\|\| __i386 \|\| __i386__ \
576	\|\| __amd64 \|\| __amd64__ \|\| __x86_64 \|\| __x86_64__ \	770	\|\| ECB_GCC_AMD64 \
577	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \	771	\|\| __powerpc__ \|\| __ppc__ \|\| __powerpc64__ \|\| __ppc64__ \
578	\|\| defined __arm__ && defined __ARM_EABI__ \
579	\|\| defined __s390__ \|\| defined __s390x__ \	772	\|\| defined __s390__ \|\| defined __s390x__ \
580	\|\| defined __mips__ \	773	\|\| defined __mips__ \
581	\|\| defined __alpha__ \	774	\|\| defined __alpha__ \
582	\|\| defined __hppa__ \	775	\|\| defined __hppa__ \
583	\|\| defined __ia64__ \	776	\|\| defined __ia64__ \
584	\|\| defined __m68k__ \	777	\|\| defined __m68k__ \
585	\|\| defined __m88k__ \	778	\|\| defined __m88k__ \
586	\|\| defined __sh__ \	779	\|\| defined __sh__ \
587	\|\| defined _M_IX86 \|\| defined _M_AMD64 \|\| defined _M_IA64	780	\|\| defined _M_IX86 \|\| defined ECB_MSVC_AMD64 \|\| defined _M_IA64 \
		781	\|\| (defined __arm__ && (defined __ARM_EABI__ \|\| defined __EABI__ \|\| defined __VFP_FP__ \|\| defined _WIN32_WCE \|\| defined __ANDROID__)) \
		782	\|\| defined __aarch64__
588	#define ECB_STDFP 1	783	#define ECB_STDFP 1
589	#include <string.h> /* for memcpy */	784	#include <string.h> /* for memcpy */
590	#else	785	#else
591	#define ECB_STDFP 0	786	#define ECB_STDFP 0
592	#endif	787	#endif
…		…
606	#define ECB_NAN NAN	801	#define ECB_NAN NAN
607	#else	802	#else
608	#define ECB_NAN ECB_INFINITY	803	#define ECB_NAN ECB_INFINITY
609	#endif	804	#endif
610		805
611	/* converts an ieee half/binary16 to a float */	806	#if ECB_C99 \|\| _XOPEN_VERSION >= 600 \|\| _POSIX_VERSION >= 200112L
612	ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;	807	#define ecb_ldexpf(x,e) ldexpf ((x), (e))
613	ecb_function_ float	808	#define ecb_frexpf(x,e) frexpf ((x), (e))
614	ecb_binary16_to_float (uint16_t x)	809	#else
615	{	810	#define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
616	int e = (x >> 10) & 0x1f;	811	#define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
617	int m = x & 0x3ff;	812	#endif
618	float r;
619
620	if (!e ) r = ldexpf (m , -24);
621	else if (e != 31) r = ldexpf (m + 0x400, e - 25);
622	else if (m ) r = ECB_NAN;
623	else r = ECB_INFINITY;
624
625	return x & 0x8000 ? -r : r;
626	}
627		813
628	/* convert a float to ieee single/binary32 */	814	/* convert a float to ieee single/binary32 */
629	ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;	815	ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
630	ecb_function_ uint32_t	816	ecb_function_ ecb_const uint32_t
631	ecb_float_to_binary32 (float x)	817	ecb_float_to_binary32 (float x)
632	{	818	{
633	uint32_t r;	819	uint32_t r;
634		820
635	#if ECB_STDFP	821	#if ECB_STDFP
…		…
642	if (x == 0e0f ) return 0x00000000U;	828	if (x == 0e0f ) return 0x00000000U;
643	if (x > +3.40282346638528860e+38f) return 0x7f800000U;	829	if (x > +3.40282346638528860e+38f) return 0x7f800000U;
644	if (x < -3.40282346638528860e+38f) return 0xff800000U;	830	if (x < -3.40282346638528860e+38f) return 0xff800000U;
645	if (x != x ) return 0x7fbfffffU;	831	if (x != x ) return 0x7fbfffffU;
646		832
647	m = frexpf (x, &e) * 0x1000000U;	833	m = ecb_frexpf (x, &e) * 0x1000000U;
648		834
649	r = m & 0x80000000U;	835	r = m & 0x80000000U;
650		836
651	if (r)	837	if (r)
652	m = -m;	838	m = -m;
…		…
664		850
665	return r;	851	return r;
666	}	852	}
667		853
668	/* converts an ieee single/binary32 to a float */	854	/* converts an ieee single/binary32 to a float */
669	ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;	855	ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
670	ecb_function_ float	856	ecb_function_ ecb_const float
671	ecb_binary32_to_float (uint32_t x)	857	ecb_binary32_to_float (uint32_t x)
672	{	858	{
673	float r;	859	float r;
674		860
675	#if ECB_STDFP	861	#if ECB_STDFP
…		…
685	x \|= 0x800000U;	871	x \|= 0x800000U;
686	else	872	else
687	e = 1;	873	e = 1;
688		874
689	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /	875	/* we distrust ldexpf a bit and do the 2*-24 scaling by an extra multiply /
690	r = ldexpf (x * (0.5f / 0x800000U), e - 126);	876	r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
691		877
692	r = neg ? -r : r;	878	r = neg ? -r : r;
693	#endif	879	#endif
694		880
695	return r;	881	return r;
696	}	882	}
697		883
698	/* convert a double to ieee double/binary64 */	884	/* convert a double to ieee double/binary64 */
699	ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;	885	ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
700	ecb_function_ uint64_t	886	ecb_function_ ecb_const uint64_t
701	ecb_double_to_binary64 (double x)	887	ecb_double_to_binary64 (double x)
702	{	888	{
703	uint64_t r;	889	uint64_t r;
704		890
705	#if ECB_STDFP	891	#if ECB_STDFP
…		…
734		920
735	return r;	921	return r;
736	}	922	}
737		923
738	/* converts an ieee double/binary64 to a double */	924	/* converts an ieee double/binary64 to a double */
739	ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;	925	ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
740	ecb_function_ double	926	ecb_function_ ecb_const double
741	ecb_binary64_to_double (uint64_t x)	927	ecb_binary64_to_double (uint64_t x)
742	{	928	{
743	double r;	929	double r;
744		930
745	#if ECB_STDFP	931	#if ECB_STDFP
…		…
763	#endif	949	#endif
764		950
765	return r;	951	return r;
766	}	952	}
767		953
768	#endif	954	/* convert a float to ieee half/binary16 */
		955	ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
		956	ecb_function_ ecb_const uint16_t
		957	ecb_float_to_binary16 (float x)
		958	{
		959	return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
		960	}
769		961
770	#endif	962	/* convert an ieee half/binary16 to float */
		963	ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
		964	ecb_function_ ecb_const float
		965	ecb_binary16_to_float (uint16_t x)
		966	{
		967	return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
		968	}
771		969
		970	#endif
		971
		972	#endif
		973

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Comparing libecb/ecb.h (file contents): Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs. Revision 1.170 by root, Sat Nov 21 21:14:55 2015 UTC

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Comparing libecb/ecb.h (file contents):
Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs.
Revision 1.170 by root, Sat Nov 21 21:14:55 2015 UTC