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Revision: 1.181
Committed: Mon Jan 20 13:16:01 2020 UTC (4 years, 5 months ago) by root
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Branch: MAIN
Changes since 1.180: +1 -1 lines
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# User Rev Content
1 root 1.1 /*
2 root 1.17 * libecb - http://software.schmorp.de/pkg/libecb
3 root 1.1 *
4 root 1.152 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
5 root 1.7 * Copyright (©) 2011 Emanuele Giaquinta
6 root 1.1 * All rights reserved.
7     *
8     * Redistribution and use in source and binary forms, with or without modifica-
9     * tion, are permitted provided that the following conditions are met:
10     *
11     * 1. Redistributions of source code must retain the above copyright notice,
12     * this list of conditions and the following disclaimer.
13     *
14     * 2. Redistributions in binary form must reproduce the above copyright
15     * notice, this list of conditions and the following disclaimer in the
16     * documentation and/or other materials provided with the distribution.
17     *
18     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
19     * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
20     * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
21     * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
22     * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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,
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
27     * OF THE POSSIBILITY OF SUCH DAMAGE.
28 root 1.133 *
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.
39 root 1.1 */
40    
41     #ifndef ECB_H
42     #define ECB_H
43    
44 root 1.87 /* 16 bits major, 16 bits minor */
45 root 1.180 #define ECB_VERSION 0x00010008
46 root 1.87
47 root 1.44 #ifdef _WIN32
48     typedef signed char int8_t;
49     typedef unsigned char uint8_t;
50 root 1.180 typedef signed char int_fast8_t;
51     typedef unsigned char uint_fast8_t;
52 root 1.44 typedef signed short int16_t;
53     typedef unsigned short uint16_t;
54 root 1.180 typedef signed int int_fast16_t;
55     typedef unsigned int uint_fast16_t;
56 root 1.44 typedef signed int int32_t;
57     typedef unsigned int uint32_t;
58 root 1.180 typedef signed int int_fast32_t;
59     typedef unsigned int uint_fast32_t;
60 root 1.44 #if __GNUC__
61     typedef signed long long int64_t;
62     typedef unsigned long long uint64_t;
63 root 1.51 #else /* _MSC_VER || __BORLANDC__ */
64 root 1.44 typedef signed __int64 int64_t;
65     typedef unsigned __int64 uint64_t;
66     #endif
67 root 1.180 typedef int64_t int_fast64_t;
68     typedef uint64_t uint_fast64_t;
69 root 1.87 #ifdef _WIN64
70     #define ECB_PTRSIZE 8
71     typedef uint64_t uintptr_t;
72     typedef int64_t intptr_t;
73     #else
74     #define ECB_PTRSIZE 4
75     typedef uint32_t uintptr_t;
76     typedef int32_t intptr_t;
77     #endif
78 root 1.44 #else
79     #include <inttypes.h>
80 root 1.173 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
81 root 1.87 #define ECB_PTRSIZE 8
82     #else
83     #define ECB_PTRSIZE 4
84     #endif
85 root 1.44 #endif
86 root 1.6
87 sf-exg 1.159 #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
88     #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
89    
90 root 1.179 #ifndef ECB_OPTIMIZE_SIZE
91     #if __OPTIMIZE_SIZE__
92     #define ECB_OPTIMIZE_SIZE 1
93     #else
94     #define ECB_OPTIMIZE_SIZE 0
95     #endif
96     #endif
97    
98 root 1.114 /* work around x32 idiocy by defining proper macros */
99 sf-exg 1.159 #if ECB_GCC_AMD64 || ECB_MSVC_AMD64
100 root 1.119 #if _ILP32
101 root 1.115 #define ECB_AMD64_X32 1
102 root 1.114 #else
103 root 1.115 #define ECB_AMD64 1
104 root 1.114 #endif
105     #endif
106    
107 root 1.12 /* many compilers define _GNUC_ to some versions but then only implement
108     * what their idiot authors think are the "more important" extensions,
109 sf-exg 1.59 * causing enormous grief in return for some better fake benchmark numbers.
110 root 1.18 * or so.
111 root 1.12 * we try to detect these and simply assume they are not gcc - if they have
112     * an issue with that they should have done it right in the first place.
113     */
114 root 1.137 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
115     #define ECB_GCC_VERSION(major,minor) 0
116     #else
117     #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
118 root 1.12 #endif
119 root 1.1
120 sf-exg 1.138 #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
121    
122 root 1.147 #if __clang__ && defined __has_builtin
123     #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
124 sf-exg 1.138 #else
125     #define ECB_CLANG_BUILTIN(x) 0
126     #endif
127    
128 root 1.147 #if __clang__ && defined __has_extension
129     #define ECB_CLANG_EXTENSION(x) __has_extension (x)
130 sf-exg 1.140 #else
131     #define ECB_CLANG_EXTENSION(x) 0
132     #endif
133    
134 root 1.91 #define ECB_CPP (__cplusplus+0)
135     #define ECB_CPP11 (__cplusplus >= 201103L)
136 root 1.177 #define ECB_CPP14 (__cplusplus >= 201402L)
137     #define ECB_CPP17 (__cplusplus >= 201703L)
138 root 1.90
139 root 1.102 #if ECB_CPP
140 root 1.127 #define ECB_C 0
141     #define ECB_STDC_VERSION 0
142     #else
143     #define ECB_C 1
144     #define ECB_STDC_VERSION __STDC_VERSION__
145     #endif
146    
147     #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
148     #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
149 root 1.177 #define ECB_C17 (ECB_STDC_VERSION >= 201710L)
150 root 1.127
151     #if ECB_CPP
152 root 1.102 #define ECB_EXTERN_C extern "C"
153     #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
154     #define ECB_EXTERN_C_END }
155     #else
156     #define ECB_EXTERN_C extern
157     #define ECB_EXTERN_C_BEG
158     #define ECB_EXTERN_C_END
159     #endif
160    
161 root 1.52 /*****************************************************************************/
162    
163 root 1.58 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
164     /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
165    
166 root 1.79 #if ECB_NO_THREADS
167 root 1.95 #define ECB_NO_SMP 1
168 root 1.79 #endif
169    
170 root 1.93 #if ECB_NO_SMP
171 root 1.64 #define ECB_MEMORY_FENCE do { } while (0)
172 root 1.58 #endif
173    
174 sf-exg 1.165 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
175     #if __xlC__ && ECB_CPP
176     #include <builtins.h>
177     #endif
178    
179 root 1.171 #if 1400 <= _MSC_VER
180     #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
181     #endif
182    
183 root 1.52 #ifndef ECB_MEMORY_FENCE
184 root 1.85 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
185 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
186 root 1.73 #if __i386 || __i386__
187 root 1.54 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
188 root 1.94 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
189 root 1.176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
190 sf-exg 1.159 #elif ECB_GCC_AMD64
191 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
192     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
193 root 1.176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
194 root 1.63 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
195 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
196 root 1.175 #elif defined __ARM_ARCH_2__ \
197     || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
198     || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
199     || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
200     || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
201     || defined __ARM_ARCH_5TEJ__
202     /* should not need any, unless running old code on newer cpu - arm doesn't support that */
203 root 1.85 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
204 root 1.175 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
205     || defined __ARM_ARCH_6T2__
206 root 1.84 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
207 root 1.85 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
208 root 1.175 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
209 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
210 root 1.129 #elif __aarch64__
211     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
212 root 1.166 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
213 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
214     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
215     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
216 root 1.85 #elif defined __s390__ || defined __s390x__
217 root 1.77 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
218 root 1.85 #elif defined __mips__
219 root 1.118 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
220 root 1.116 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
221     #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
222 root 1.86 #elif defined __alpha__
223 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
224     #elif defined __hppa__
225     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
226     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
227     #elif defined __ia64__
228     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
229 root 1.117 #elif defined __m68k__
230     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
231     #elif defined __m88k__
232     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
233     #elif defined __sh__
234     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
235 root 1.52 #endif
236     #endif
237     #endif
238    
239     #ifndef ECB_MEMORY_FENCE
240 root 1.93 #if ECB_GCC_VERSION(4,7)
241 root 1.97 /* see comment below (stdatomic.h) about the C11 memory model. */
242 root 1.93 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
243 root 1.128 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
244     #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
245 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
246 root 1.110
247 sf-exg 1.140 #elif ECB_CLANG_EXTENSION(c_atomic)
248     /* see comment below (stdatomic.h) about the C11 memory model. */
249     #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
250     #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
251     #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
252 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
253 root 1.110
254 root 1.93 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
255 root 1.52 #define ECB_MEMORY_FENCE __sync_synchronize ()
256 root 1.126 #elif _MSC_VER >= 1500 /* VC++ 2008 */
257     /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
258     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
259     #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
260     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
261     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
262 root 1.57 #elif _MSC_VER >= 1400 /* VC++ 2005 */
263     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
264     #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
265     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
266     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
267 root 1.85 #elif defined _WIN32
268 root 1.55 #include <WinNT.h>
269 root 1.57 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
270 root 1.72 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
271     #include <mbarrier.h>
272 root 1.178 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
273     #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
274     #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
275     #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
276 root 1.82 #elif __xlC__
277 root 1.83 #define ECB_MEMORY_FENCE __sync ()
278 root 1.52 #endif
279     #endif
280    
281 root 1.53 #ifndef ECB_MEMORY_FENCE
282 root 1.94 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
283     /* we assume that these memory fences work on all variables/all memory accesses, */
284     /* not just C11 atomics and atomic accesses */
285     #include <stdatomic.h>
286     #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
287 root 1.178 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
288     #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
289 root 1.94 #endif
290     #endif
291    
292     #ifndef ECB_MEMORY_FENCE
293 root 1.62 #if !ECB_AVOID_PTHREADS
294     /*
295     * if you get undefined symbol references to pthread_mutex_lock,
296     * or failure to find pthread.h, then you should implement
297     * the ECB_MEMORY_FENCE operations for your cpu/compiler
298     * OR provide pthread.h and link against the posix thread library
299     * of your system.
300     */
301     #include <pthread.h>
302     #define ECB_NEEDS_PTHREADS 1
303     #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
304 root 1.52
305 root 1.62 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
306     #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
307     #endif
308     #endif
309    
310 root 1.85 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
311 root 1.52 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
312 root 1.62 #endif
313    
314 root 1.85 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
315 root 1.52 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
316     #endif
317    
318 root 1.178 #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
319     #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
320     #endif
321    
322 root 1.52 /*****************************************************************************/
323    
324 root 1.149 #if ECB_CPP
325 root 1.46 #define ecb_inline static inline
326 root 1.38 #elif ECB_GCC_VERSION(2,5)
327 root 1.46 #define ecb_inline static __inline__
328 root 1.39 #elif ECB_C99
329 root 1.46 #define ecb_inline static inline
330 root 1.29 #else
331 root 1.46 #define ecb_inline static
332 root 1.38 #endif
333    
334     #if ECB_GCC_VERSION(3,3)
335     #define ecb_restrict __restrict__
336 root 1.39 #elif ECB_C99
337 root 1.38 #define ecb_restrict restrict
338     #else
339     #define ecb_restrict
340 root 1.4 #endif
341    
342 root 1.38 typedef int ecb_bool;
343    
344 root 1.8 #define ECB_CONCAT_(a, b) a ## b
345     #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
346     #define ECB_STRINGIFY_(a) # a
347     #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
348 root 1.155 #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
349 root 1.8
350 root 1.46 #define ecb_function_ ecb_inline
351 root 1.3
352 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
353 root 1.142 #define ecb_attribute(attrlist) __attribute__ (attrlist)
354 root 1.37 #else
355     #define ecb_attribute(attrlist)
356 sf-exg 1.138 #endif
357 root 1.127
358 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
359     #define ecb_is_constant(expr) __builtin_constant_p (expr)
360     #else
361 root 1.127 /* possible C11 impl for integral types
362     typedef struct ecb_is_constant_struct ecb_is_constant_struct;
363     #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
364    
365 root 1.37 #define ecb_is_constant(expr) 0
366 sf-exg 1.138 #endif
367    
368     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
369     #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
370     #else
371 root 1.37 #define ecb_expect(expr,value) (expr)
372 sf-exg 1.138 #endif
373    
374     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
375     #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
376     #else
377 root 1.37 #define ecb_prefetch(addr,rw,locality)
378 root 1.1 #endif
379    
380 root 1.2 /* no emulation for ecb_decltype */
381 root 1.143 #if ECB_CPP11
382 root 1.144 // older implementations might have problems with decltype(x)::type, work around it
383 root 1.146 template<class T> struct ecb_decltype_t { typedef T type; };
384     #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
385 root 1.143 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
386     #define ecb_decltype(x) __typeof__ (x)
387 root 1.1 #endif
388    
389 root 1.135 #if _MSC_VER >= 1300
390 root 1.149 #define ecb_deprecated __declspec (deprecated)
391 root 1.135 #else
392     #define ecb_deprecated ecb_attribute ((__deprecated__))
393     #endif
394    
395 sf-exg 1.162 #if _MSC_VER >= 1500
396 root 1.154 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
397     #elif ECB_GCC_VERSION(4,5)
398     #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
399     #else
400     #define ecb_deprecated_message(msg) ecb_deprecated
401     #endif
402    
403     #if _MSC_VER >= 1400
404     #define ecb_noinline __declspec (noinline)
405     #else
406     #define ecb_noinline ecb_attribute ((__noinline__))
407     #endif
408    
409 root 1.24 #define ecb_unused ecb_attribute ((__unused__))
410     #define ecb_const ecb_attribute ((__const__))
411     #define ecb_pure ecb_attribute ((__pure__))
412 root 1.35
413 root 1.145 #if ECB_C11 || __IBMC_NORETURN
414 sf-exg 1.165 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
415 root 1.90 #define ecb_noreturn _Noreturn
416 root 1.153 #elif ECB_CPP11
417     #define ecb_noreturn [[noreturn]]
418     #elif _MSC_VER >= 1200
419 sf-exg 1.156 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
420 root 1.153 #define ecb_noreturn __declspec (noreturn)
421 root 1.90 #else
422     #define ecb_noreturn ecb_attribute ((__noreturn__))
423     #endif
424    
425 root 1.35 #if ECB_GCC_VERSION(4,3)
426 root 1.39 #define ecb_artificial ecb_attribute ((__artificial__))
427     #define ecb_hot ecb_attribute ((__hot__))
428     #define ecb_cold ecb_attribute ((__cold__))
429 root 1.35 #else
430     #define ecb_artificial
431     #define ecb_hot
432     #define ecb_cold
433     #endif
434 root 1.1
435 root 1.39 /* put around conditional expressions if you are very sure that the */
436     /* expression is mostly true or mostly false. note that these return */
437     /* booleans, not the expression. */
438 root 1.33 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
439     #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
440 root 1.36 /* for compatibility to the rest of the world */
441 root 1.33 #define ecb_likely(expr) ecb_expect_true (expr)
442     #define ecb_unlikely(expr) ecb_expect_false (expr)
443 root 1.1
444 root 1.3 /* count trailing zero bits and count # of one bits */
445 root 1.139 #if ECB_GCC_VERSION(3,4) \
446     || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
447     && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
448     && ECB_CLANG_BUILTIN(__builtin_popcount))
449 root 1.49 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
450     #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
451     #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
452 root 1.35 #define ecb_ctz32(x) __builtin_ctz (x)
453 root 1.49 #define ecb_ctz64(x) __builtin_ctzll (x)
454 root 1.35 #define ecb_popcount32(x) __builtin_popcount (x)
455 root 1.49 /* no popcountll */
456 root 1.1 #else
457 root 1.151 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
458     ecb_function_ ecb_const int
459 root 1.35 ecb_ctz32 (uint32_t x)
460     {
461 root 1.171 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
462 root 1.172 unsigned long r;
463 root 1.171 _BitScanForward (&r, x);
464     return (int)r;
465     #else
466 root 1.35 int r = 0;
467    
468 root 1.48 x &= ~x + 1; /* this isolates the lowest bit */
469 root 1.35
470 root 1.50 #if ECB_branchless_on_i386
471     r += !!(x & 0xaaaaaaaa) << 0;
472     r += !!(x & 0xcccccccc) << 1;
473     r += !!(x & 0xf0f0f0f0) << 2;
474     r += !!(x & 0xff00ff00) << 3;
475     r += !!(x & 0xffff0000) << 4;
476     #else
477 root 1.35 if (x & 0xaaaaaaaa) r += 1;
478     if (x & 0xcccccccc) r += 2;
479     if (x & 0xf0f0f0f0) r += 4;
480     if (x & 0xff00ff00) r += 8;
481     if (x & 0xffff0000) r += 16;
482 root 1.50 #endif
483 root 1.35
484     return r;
485 root 1.171 #endif
486 root 1.35 }
487    
488 root 1.151 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
489     ecb_function_ ecb_const int
490 root 1.49 ecb_ctz64 (uint64_t x)
491     {
492 root 1.171 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
493 root 1.172 unsigned long r;
494 root 1.171 _BitScanForward64 (&r, x);
495     return (int)r;
496     #else
497 root 1.168 int shift = x & 0xffffffff ? 0 : 32;
498 root 1.50 return ecb_ctz32 (x >> shift) + shift;
499 root 1.171 #endif
500 root 1.49 }
501    
502 root 1.151 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
503     ecb_function_ ecb_const int
504 root 1.35 ecb_popcount32 (uint32_t x)
505     {
506     x -= (x >> 1) & 0x55555555;
507     x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
508     x = ((x >> 4) + x) & 0x0f0f0f0f;
509     x *= 0x01010101;
510 root 1.1
511 root 1.35 return x >> 24;
512     }
513 root 1.49
514 root 1.151 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
515     ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
516 root 1.49 {
517 root 1.171 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
518 root 1.172 unsigned long r;
519 root 1.171 _BitScanReverse (&r, x);
520     return (int)r;
521     #else
522 root 1.50 int r = 0;
523 root 1.49
524 root 1.50 if (x >> 16) { x >>= 16; r += 16; }
525     if (x >> 8) { x >>= 8; r += 8; }
526     if (x >> 4) { x >>= 4; r += 4; }
527     if (x >> 2) { x >>= 2; r += 2; }
528     if (x >> 1) { r += 1; }
529 root 1.49
530     return r;
531 root 1.171 #endif
532 root 1.49 }
533    
534 root 1.151 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
535     ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
536 root 1.49 {
537 root 1.171 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
538 root 1.172 unsigned long r;
539 root 1.171 _BitScanReverse64 (&r, x);
540     return (int)r;
541     #else
542 root 1.50 int r = 0;
543 root 1.49
544 root 1.50 if (x >> 32) { x >>= 32; r += 32; }
545 root 1.49
546 root 1.50 return r + ecb_ld32 (x);
547 root 1.171 #endif
548 root 1.49 }
549 root 1.1 #endif
550    
551 root 1.151 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
552     ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
553     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
554     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
555 root 1.88
556 root 1.151 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
557     ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
558 root 1.70 {
559     return ( (x * 0x0802U & 0x22110U)
560 root 1.151 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
561 root 1.70 }
562    
563 root 1.151 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
564     ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
565 root 1.70 {
566     x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
567     x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
568     x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
569     x = ( x >> 8 ) | ( x << 8);
570    
571     return x;
572     }
573    
574 root 1.151 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
575     ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
576 root 1.70 {
577     x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
578     x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
579     x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
580     x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
581     x = ( x >> 16 ) | ( x << 16);
582    
583     return x;
584     }
585    
586 root 1.49 /* popcount64 is only available on 64 bit cpus as gcc builtin */
587     /* so for this version we are lazy */
588 root 1.151 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
589     ecb_function_ ecb_const int
590 root 1.49 ecb_popcount64 (uint64_t x)
591     {
592     return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
593     }
594    
595 root 1.151 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
596     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
597     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
598     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
599     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
600     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
601     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
602     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
603    
604     ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
605     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
606     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
607     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
608     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
609     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
610     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
611     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
612 root 1.50
613 sf-exg 1.138 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
614 root 1.164 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
615     #define ecb_bswap16(x) __builtin_bswap16 (x)
616     #else
617 root 1.49 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
618 root 1.164 #endif
619 root 1.49 #define ecb_bswap32(x) __builtin_bswap32 (x)
620     #define ecb_bswap64(x) __builtin_bswap64 (x)
621 root 1.164 #elif _MSC_VER
622     #include <stdlib.h>
623     #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
624     #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
625     #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
626 root 1.13 #else
627 root 1.151 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
628     ecb_function_ ecb_const uint16_t
629 root 1.50 ecb_bswap16 (uint16_t x)
630 root 1.49 {
631 root 1.50 return ecb_rotl16 (x, 8);
632 root 1.49 }
633    
634 root 1.151 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
635     ecb_function_ ecb_const uint32_t
636 root 1.35 ecb_bswap32 (uint32_t x)
637     {
638 root 1.50 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
639 root 1.35 }
640    
641 root 1.151 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
642     ecb_function_ ecb_const uint64_t
643 root 1.49 ecb_bswap64 (uint64_t x)
644 root 1.35 {
645 root 1.50 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
646 root 1.35 }
647 root 1.13 #endif
648    
649 sf-exg 1.138 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
650 root 1.35 #define ecb_unreachable() __builtin_unreachable ()
651 root 1.13 #else
652 root 1.35 /* this seems to work fine, but gcc always emits a warning for it :/ */
653 root 1.151 ecb_inline ecb_noreturn void ecb_unreachable (void);
654     ecb_inline ecb_noreturn void ecb_unreachable (void) { }
655 root 1.13 #endif
656    
657 root 1.41 /* try to tell the compiler that some condition is definitely true */
658 root 1.100 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
659 root 1.41
660 root 1.174 ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
661     ecb_inline ecb_const uint32_t
662 root 1.23 ecb_byteorder_helper (void)
663 root 1.3 {
664 root 1.98 /* the union code still generates code under pressure in gcc, */
665 sf-exg 1.111 /* but less than using pointers, and always seems to */
666 root 1.98 /* successfully return a constant. */
667     /* the reason why we have this horrible preprocessor mess */
668 root 1.99 /* is to avoid it in all cases, at least on common architectures */
669 sf-exg 1.111 /* or when using a recent enough gcc version (>= 4.6) */
670 root 1.174 #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
671     || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
672     #define ECB_LITTLE_ENDIAN 1
673     return 0x44332211;
674     #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
675     || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
676     #define ECB_BIG_ENDIAN 1
677     return 0x11223344;
678 root 1.98 #else
679     union
680     {
681 root 1.174 uint8_t c[4];
682     uint32_t u;
683     } u = { 0x11, 0x22, 0x33, 0x44 };
684     return u.u;
685 root 1.98 #endif
686 root 1.3 }
687    
688 root 1.151 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
689 root 1.174 ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
690 root 1.151 ecb_inline ecb_const ecb_bool ecb_little_endian (void);
691 root 1.174 ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
692 root 1.3
693 root 1.180 /*****************************************************************************/
694     /* unaligned load/store */
695    
696     ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
697     ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
698     ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
699    
700     ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
701     ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
702     ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
703    
704     ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
705     ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
706     ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
707    
708     ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
709     ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
710     ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
711    
712     ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
713     ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
714     ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
715    
716     ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
717     ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
718     ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
719    
720     ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
721     ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
722     ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
723    
724     ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
725     ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
726     ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
727    
728     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)); }
729     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)); }
730     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)); }
731    
732     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)); }
733     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)); }
734     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)); }
735    
736 root 1.181 #ifdef ECB_CPP
737 root 1.180
738     inline uint8_t ecb_bswap (uint8_t v) { return v; }
739     inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
740     inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
741     inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
742    
743     template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
744     template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
745     template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
746     template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
747     template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
748     template<typename T> inline T ecb_peek_u (const void *ptr) { T v; std::memcpy (&v, ptr, sizeof (v)); return v; }
749     template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
750     template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
751    
752     template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
753     template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
754     template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
755     template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
756     template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
757     template<typename T> inline void ecb_poke_u (void *ptr, T v) { std::memcpy (ptr, &v, sizeof (v)); }
758     template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
759     template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
760    
761     #endif
762    
763     /*****************************************************************************/
764    
765 root 1.39 #if ECB_GCC_VERSION(3,0) || ECB_C99
766 root 1.35 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
767 root 1.31 #else
768 root 1.35 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
769 root 1.31 #endif
770 root 1.21
771 root 1.149 #if ECB_CPP
772 sf-exg 1.68 template<typename T>
773     static inline T ecb_div_rd (T val, T div)
774     {
775     return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
776     }
777     template<typename T>
778     static inline T ecb_div_ru (T val, T div)
779     {
780     return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
781     }
782     #else
783     #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
784     #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
785     #endif
786 sf-exg 1.67
787 root 1.5 #if ecb_cplusplus_does_not_suck
788 root 1.40 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
789 root 1.35 template<typename T, int N>
790     static inline int ecb_array_length (const T (&arr)[N])
791     {
792     return N;
793     }
794 root 1.5 #else
795 root 1.35 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
796 root 1.5 #endif
797    
798 root 1.180 /*****************************************************************************/
799    
800 root 1.170 ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
801 root 1.167 ecb_function_ ecb_const uint32_t
802 root 1.170 ecb_binary16_to_binary32 (uint32_t x)
803 root 1.167 {
804     unsigned int s = (x & 0x8000) << (31 - 15);
805     int e = (x >> 10) & 0x001f;
806     unsigned int m = x & 0x03ff;
807    
808     if (ecb_expect_false (e == 31))
809     /* infinity or NaN */
810     e = 255 - (127 - 15);
811     else if (ecb_expect_false (!e))
812     {
813     if (ecb_expect_true (!m))
814     /* zero, handled by code below by forcing e to 0 */
815     e = 0 - (127 - 15);
816     else
817     {
818     /* subnormal, renormalise */
819     unsigned int s = 10 - ecb_ld32 (m);
820    
821     m = (m << s) & 0x3ff; /* mask implicit bit */
822     e -= s - 1;
823     }
824     }
825    
826     /* e and m now are normalised, or zero, (or inf or nan) */
827     e += 127 - 15;
828    
829     return s | (e << 23) | (m << (23 - 10));
830     }
831    
832     ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
833     ecb_function_ ecb_const uint16_t
834     ecb_binary32_to_binary16 (uint32_t x)
835     {
836     unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
837     unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
838     unsigned int m = x & 0x007fffff;
839    
840     x &= 0x7fffffff;
841    
842     /* if it's within range of binary16 normals, use fast path */
843     if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
844     {
845     /* mantissa round-to-even */
846     m += 0x00000fff + ((m >> (23 - 10)) & 1);
847    
848     /* handle overflow */
849     if (ecb_expect_false (m >= 0x00800000))
850     {
851     m >>= 1;
852     e += 1;
853     }
854    
855     return s | (e << 10) | (m >> (23 - 10));
856     }
857    
858     /* handle large numbers and infinity */
859     if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
860     return s | 0x7c00;
861    
862 root 1.169 /* handle zero, subnormals and small numbers */
863 root 1.167 if (ecb_expect_true (x < 0x38800000))
864     {
865     /* zero */
866     if (ecb_expect_true (!x))
867     return s;
868    
869     /* handle subnormals */
870    
871 root 1.169 /* too small, will be zero */
872     if (e < (14 - 24)) /* might not be sharp, but is good enough */
873     return s;
874    
875 root 1.167 m |= 0x00800000; /* make implicit bit explicit */
876    
877     /* very tricky - we need to round to the nearest e (+10) bit value */
878     {
879     unsigned int bits = 14 - e;
880     unsigned int half = (1 << (bits - 1)) - 1;
881     unsigned int even = (m >> bits) & 1;
882    
883     /* if this overflows, we will end up with a normalised number */
884     m = (m + half + even) >> bits;
885     }
886    
887     return s | m;
888     }
889    
890     /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
891     m >>= 13;
892    
893     return s | 0x7c00 | m | !m;
894     }
895    
896 root 1.104 /*******************************************************************************/
897     /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
898    
899     /* basically, everything uses "ieee pure-endian" floating point numbers */
900     /* the only noteworthy exception is ancient armle, which uses order 43218765 */
901     #if 0 \
902     || __i386 || __i386__ \
903 sf-exg 1.159 || ECB_GCC_AMD64 \
904 root 1.104 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
905     || defined __s390__ || defined __s390x__ \
906     || defined __mips__ \
907     || defined __alpha__ \
908     || defined __hppa__ \
909     || defined __ia64__ \
910 root 1.117 || defined __m68k__ \
911     || defined __m88k__ \
912     || defined __sh__ \
913 sf-exg 1.159 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
914 root 1.131 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
915 root 1.132 || defined __aarch64__
916 root 1.104 #define ECB_STDFP 1
917     #include <string.h> /* for memcpy */
918 root 1.102 #else
919 root 1.104 #define ECB_STDFP 0
920 root 1.102 #endif
921    
922 root 1.104 #ifndef ECB_NO_LIBM
923 root 1.103
924 root 1.121 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
925    
926 root 1.122 /* only the oldest of old doesn't have this one. solaris. */
927     #ifdef INFINITY
928     #define ECB_INFINITY INFINITY
929     #else
930     #define ECB_INFINITY HUGE_VAL
931     #endif
932    
933     #ifdef NAN
934 root 1.121 #define ECB_NAN NAN
935     #else
936 root 1.122 #define ECB_NAN ECB_INFINITY
937 root 1.121 #endif
938 root 1.120
939 root 1.148 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
940 root 1.150 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
941 sf-exg 1.163 #define ecb_frexpf(x,e) frexpf ((x), (e))
942 root 1.148 #else
943 sf-exg 1.161 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
944 sf-exg 1.163 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
945 root 1.148 #endif
946    
947 root 1.104 /* convert a float to ieee single/binary32 */
948 root 1.151 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
949     ecb_function_ ecb_const uint32_t
950 root 1.103 ecb_float_to_binary32 (float x)
951     {
952     uint32_t r;
953    
954     #if ECB_STDFP
955 root 1.104 memcpy (&r, &x, 4);
956 root 1.103 #else
957 root 1.105 /* slow emulation, works for anything but -0 */
958 root 1.103 uint32_t m;
959     int e;
960    
961 root 1.108 if (x == 0e0f ) return 0x00000000U;
962 root 1.103 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
963     if (x < -3.40282346638528860e+38f) return 0xff800000U;
964 root 1.105 if (x != x ) return 0x7fbfffffU;
965 root 1.103
966 sf-exg 1.163 m = ecb_frexpf (x, &e) * 0x1000000U;
967 root 1.103
968     r = m & 0x80000000U;
969    
970     if (r)
971     m = -m;
972    
973 root 1.108 if (e <= -126)
974 root 1.103 {
975     m &= 0xffffffU;
976     m >>= (-125 - e);
977     e = -126;
978     }
979    
980     r |= (e + 126) << 23;
981     r |= m & 0x7fffffU;
982     #endif
983    
984     return r;
985     }
986    
987 root 1.104 /* converts an ieee single/binary32 to a float */
988 root 1.151 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
989     ecb_function_ ecb_const float
990 root 1.103 ecb_binary32_to_float (uint32_t x)
991     {
992     float r;
993    
994     #if ECB_STDFP
995 root 1.104 memcpy (&r, &x, 4);
996 root 1.103 #else
997     /* emulation, only works for normals and subnormals and +0 */
998     int neg = x >> 31;
999     int e = (x >> 23) & 0xffU;
1000    
1001     x &= 0x7fffffU;
1002    
1003     if (e)
1004     x |= 0x800000U;
1005 root 1.104 else
1006     e = 1;
1007 root 1.103
1008     /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1009 root 1.148 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1010 root 1.103
1011     r = neg ? -r : r;
1012     #endif
1013    
1014     return r;
1015     }
1016    
1017 root 1.104 /* convert a double to ieee double/binary64 */
1018 root 1.151 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1019     ecb_function_ ecb_const uint64_t
1020 root 1.103 ecb_double_to_binary64 (double x)
1021     {
1022 root 1.104 uint64_t r;
1023    
1024     #if ECB_STDFP
1025     memcpy (&r, &x, 8);
1026     #else
1027 root 1.105 /* slow emulation, works for anything but -0 */
1028 root 1.104 uint64_t m;
1029     int e;
1030    
1031 root 1.108 if (x == 0e0 ) return 0x0000000000000000U;
1032 root 1.104 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1033     if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1034 root 1.105 if (x != x ) return 0X7ff7ffffffffffffU;
1035 root 1.104
1036     m = frexp (x, &e) * 0x20000000000000U;
1037    
1038     r = m & 0x8000000000000000;;
1039    
1040     if (r)
1041     m = -m;
1042    
1043 root 1.108 if (e <= -1022)
1044 root 1.104 {
1045     m &= 0x1fffffffffffffU;
1046     m >>= (-1021 - e);
1047     e = -1022;
1048     }
1049    
1050     r |= ((uint64_t)(e + 1022)) << 52;
1051     r |= m & 0xfffffffffffffU;
1052     #endif
1053    
1054     return r;
1055     }
1056    
1057     /* converts an ieee double/binary64 to a double */
1058 root 1.151 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1059     ecb_function_ ecb_const double
1060 root 1.104 ecb_binary64_to_double (uint64_t x)
1061     {
1062     double r;
1063    
1064     #if ECB_STDFP
1065     memcpy (&r, &x, 8);
1066     #else
1067     /* emulation, only works for normals and subnormals and +0 */
1068     int neg = x >> 63;
1069     int e = (x >> 52) & 0x7ffU;
1070    
1071     x &= 0xfffffffffffffU;
1072    
1073     if (e)
1074     x |= 0x10000000000000U;
1075     else
1076     e = 1;
1077    
1078 root 1.107 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1079 root 1.108 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1080 root 1.104
1081     r = neg ? -r : r;
1082     #endif
1083    
1084     return r;
1085 root 1.103 }
1086    
1087 root 1.167 /* convert a float to ieee half/binary16 */
1088     ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1089     ecb_function_ ecb_const uint16_t
1090     ecb_float_to_binary16 (float x)
1091     {
1092     return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1093     }
1094    
1095     /* convert an ieee half/binary16 to float */
1096     ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1097     ecb_function_ ecb_const float
1098     ecb_binary16_to_float (uint16_t x)
1099     {
1100     return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1101     }
1102    
1103 root 1.103 #endif
1104 root 1.102
1105 root 1.1 #endif
1106