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Revision: 1.189
Committed: Mon Jun 21 21:26:48 2021 UTC (2 years, 11 months ago) by root
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Branch: MAIN
Changes since 1.188: +8 -2 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 1.189 * Copyright (©) 2009-2015,2018-2021 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 1.189 #define ECB_VERSION 0x00010009
46 root 1.87
47 root 1.184 #include <string.h> /* for memcpy */
48    
49 root 1.187 #if defined (_WIN32) && !defined (__MINGW32__)
50 root 1.44 typedef signed char int8_t;
51     typedef unsigned char uint8_t;
52 root 1.180 typedef signed char int_fast8_t;
53     typedef unsigned char uint_fast8_t;
54 root 1.44 typedef signed short int16_t;
55     typedef unsigned short uint16_t;
56 root 1.180 typedef signed int int_fast16_t;
57     typedef unsigned int uint_fast16_t;
58 root 1.44 typedef signed int int32_t;
59     typedef unsigned int uint32_t;
60 root 1.180 typedef signed int int_fast32_t;
61     typedef unsigned int uint_fast32_t;
62 root 1.44 #if __GNUC__
63     typedef signed long long int64_t;
64     typedef unsigned long long uint64_t;
65 root 1.51 #else /* _MSC_VER || __BORLANDC__ */
66 root 1.44 typedef signed __int64 int64_t;
67     typedef unsigned __int64 uint64_t;
68     #endif
69 root 1.180 typedef int64_t int_fast64_t;
70     typedef uint64_t uint_fast64_t;
71 root 1.87 #ifdef _WIN64
72     #define ECB_PTRSIZE 8
73     typedef uint64_t uintptr_t;
74     typedef int64_t intptr_t;
75     #else
76     #define ECB_PTRSIZE 4
77     typedef uint32_t uintptr_t;
78     typedef int32_t intptr_t;
79     #endif
80 root 1.44 #else
81     #include <inttypes.h>
82 root 1.173 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
83 root 1.87 #define ECB_PTRSIZE 8
84     #else
85     #define ECB_PTRSIZE 4
86     #endif
87 root 1.44 #endif
88 root 1.6
89 sf-exg 1.159 #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
90     #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
91    
92 root 1.179 #ifndef ECB_OPTIMIZE_SIZE
93     #if __OPTIMIZE_SIZE__
94     #define ECB_OPTIMIZE_SIZE 1
95     #else
96     #define ECB_OPTIMIZE_SIZE 0
97     #endif
98     #endif
99    
100 root 1.114 /* work around x32 idiocy by defining proper macros */
101 sf-exg 1.159 #if ECB_GCC_AMD64 || ECB_MSVC_AMD64
102 root 1.119 #if _ILP32
103 root 1.115 #define ECB_AMD64_X32 1
104 root 1.114 #else
105 root 1.115 #define ECB_AMD64 1
106 root 1.114 #endif
107     #endif
108    
109 root 1.189 #if ECB_PTRSIZE >= 8 || ECB_AMD64_X32
110     #define ECB_64BIT_NATIVE 1
111     #else
112     #define ECB_64BIT_NATIVE 0
113     #endif
114    
115 root 1.12 /* many compilers define _GNUC_ to some versions but then only implement
116     * what their idiot authors think are the "more important" extensions,
117 sf-exg 1.59 * causing enormous grief in return for some better fake benchmark numbers.
118 root 1.18 * or so.
119 root 1.12 * we try to detect these and simply assume they are not gcc - if they have
120     * an issue with that they should have done it right in the first place.
121     */
122 root 1.137 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
123     #define ECB_GCC_VERSION(major,minor) 0
124     #else
125     #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
126 root 1.12 #endif
127 root 1.1
128 sf-exg 1.138 #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
129    
130 root 1.147 #if __clang__ && defined __has_builtin
131     #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
132 sf-exg 1.138 #else
133     #define ECB_CLANG_BUILTIN(x) 0
134     #endif
135    
136 root 1.147 #if __clang__ && defined __has_extension
137     #define ECB_CLANG_EXTENSION(x) __has_extension (x)
138 sf-exg 1.140 #else
139     #define ECB_CLANG_EXTENSION(x) 0
140     #endif
141    
142 root 1.91 #define ECB_CPP (__cplusplus+0)
143     #define ECB_CPP11 (__cplusplus >= 201103L)
144 root 1.177 #define ECB_CPP14 (__cplusplus >= 201402L)
145     #define ECB_CPP17 (__cplusplus >= 201703L)
146 root 1.90
147 root 1.102 #if ECB_CPP
148 root 1.127 #define ECB_C 0
149     #define ECB_STDC_VERSION 0
150     #else
151     #define ECB_C 1
152     #define ECB_STDC_VERSION __STDC_VERSION__
153     #endif
154    
155     #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
156     #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
157 root 1.177 #define ECB_C17 (ECB_STDC_VERSION >= 201710L)
158 root 1.127
159     #if ECB_CPP
160 root 1.102 #define ECB_EXTERN_C extern "C"
161     #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
162     #define ECB_EXTERN_C_END }
163     #else
164     #define ECB_EXTERN_C extern
165     #define ECB_EXTERN_C_BEG
166     #define ECB_EXTERN_C_END
167     #endif
168    
169 root 1.52 /*****************************************************************************/
170    
171 root 1.58 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
172     /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
173    
174 root 1.79 #if ECB_NO_THREADS
175 root 1.95 #define ECB_NO_SMP 1
176 root 1.79 #endif
177    
178 root 1.93 #if ECB_NO_SMP
179 root 1.64 #define ECB_MEMORY_FENCE do { } while (0)
180 root 1.58 #endif
181    
182 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 */
183     #if __xlC__ && ECB_CPP
184     #include <builtins.h>
185     #endif
186    
187 root 1.171 #if 1400 <= _MSC_VER
188     #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
189     #endif
190    
191 root 1.52 #ifndef ECB_MEMORY_FENCE
192 root 1.85 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
193 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
194 root 1.73 #if __i386 || __i386__
195 root 1.54 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
196 root 1.94 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
197 root 1.176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
198 sf-exg 1.159 #elif ECB_GCC_AMD64
199 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
200     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
201 root 1.176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
202 root 1.63 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
203 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
204 root 1.175 #elif defined __ARM_ARCH_2__ \
205     || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
206     || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
207     || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
208     || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
209     || defined __ARM_ARCH_5TEJ__
210     /* should not need any, unless running old code on newer cpu - arm doesn't support that */
211 root 1.85 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
212 root 1.175 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
213     || defined __ARM_ARCH_6T2__
214 root 1.84 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
215 root 1.85 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
216 root 1.175 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
217 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
218 root 1.129 #elif __aarch64__
219     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
220 root 1.166 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
221 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
222     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
223     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
224 root 1.85 #elif defined __s390__ || defined __s390x__
225 root 1.77 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
226 root 1.85 #elif defined __mips__
227 root 1.118 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
228 root 1.116 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
229     #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
230 root 1.86 #elif defined __alpha__
231 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
232     #elif defined __hppa__
233     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
234     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
235     #elif defined __ia64__
236     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
237 root 1.117 #elif defined __m68k__
238     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
239     #elif defined __m88k__
240     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
241     #elif defined __sh__
242     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
243 root 1.52 #endif
244     #endif
245     #endif
246    
247     #ifndef ECB_MEMORY_FENCE
248 root 1.93 #if ECB_GCC_VERSION(4,7)
249 root 1.97 /* see comment below (stdatomic.h) about the C11 memory model. */
250 root 1.93 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
251 root 1.128 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
252     #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
253 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
254 root 1.110
255 sf-exg 1.140 #elif ECB_CLANG_EXTENSION(c_atomic)
256     /* see comment below (stdatomic.h) about the C11 memory model. */
257     #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
258     #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
259     #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
260 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
261 root 1.110
262 root 1.93 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
263 root 1.52 #define ECB_MEMORY_FENCE __sync_synchronize ()
264 root 1.126 #elif _MSC_VER >= 1500 /* VC++ 2008 */
265     /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
266     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
267     #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
268     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
269     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
270 root 1.57 #elif _MSC_VER >= 1400 /* VC++ 2005 */
271     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
272     #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
273     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
274     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
275 root 1.85 #elif defined _WIN32
276 root 1.55 #include <WinNT.h>
277 root 1.57 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
278 root 1.72 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
279     #include <mbarrier.h>
280 root 1.178 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
281     #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
282     #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
283     #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
284 root 1.82 #elif __xlC__
285 root 1.83 #define ECB_MEMORY_FENCE __sync ()
286 root 1.52 #endif
287     #endif
288    
289 root 1.53 #ifndef ECB_MEMORY_FENCE
290 root 1.94 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
291     /* we assume that these memory fences work on all variables/all memory accesses, */
292     /* not just C11 atomics and atomic accesses */
293     #include <stdatomic.h>
294     #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
295 root 1.178 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
296     #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
297 root 1.94 #endif
298     #endif
299    
300     #ifndef ECB_MEMORY_FENCE
301 root 1.62 #if !ECB_AVOID_PTHREADS
302     /*
303     * if you get undefined symbol references to pthread_mutex_lock,
304     * or failure to find pthread.h, then you should implement
305     * the ECB_MEMORY_FENCE operations for your cpu/compiler
306     * OR provide pthread.h and link against the posix thread library
307     * of your system.
308     */
309     #include <pthread.h>
310     #define ECB_NEEDS_PTHREADS 1
311     #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
312 root 1.52
313 root 1.62 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
314     #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
315     #endif
316     #endif
317    
318 root 1.85 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
319 root 1.52 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
320 root 1.62 #endif
321    
322 root 1.85 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
323 root 1.52 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
324     #endif
325    
326 root 1.178 #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
327     #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
328     #endif
329    
330 root 1.52 /*****************************************************************************/
331    
332 root 1.149 #if ECB_CPP
333 root 1.46 #define ecb_inline static inline
334 root 1.38 #elif ECB_GCC_VERSION(2,5)
335 root 1.46 #define ecb_inline static __inline__
336 root 1.39 #elif ECB_C99
337 root 1.46 #define ecb_inline static inline
338 root 1.29 #else
339 root 1.46 #define ecb_inline static
340 root 1.38 #endif
341    
342     #if ECB_GCC_VERSION(3,3)
343     #define ecb_restrict __restrict__
344 root 1.39 #elif ECB_C99
345 root 1.38 #define ecb_restrict restrict
346     #else
347     #define ecb_restrict
348 root 1.4 #endif
349    
350 root 1.38 typedef int ecb_bool;
351    
352 root 1.8 #define ECB_CONCAT_(a, b) a ## b
353     #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
354     #define ECB_STRINGIFY_(a) # a
355     #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
356 root 1.155 #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
357 root 1.8
358 root 1.46 #define ecb_function_ ecb_inline
359 root 1.3
360 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
361 root 1.142 #define ecb_attribute(attrlist) __attribute__ (attrlist)
362 root 1.37 #else
363     #define ecb_attribute(attrlist)
364 sf-exg 1.138 #endif
365 root 1.127
366 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
367     #define ecb_is_constant(expr) __builtin_constant_p (expr)
368     #else
369 root 1.127 /* possible C11 impl for integral types
370     typedef struct ecb_is_constant_struct ecb_is_constant_struct;
371     #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
372    
373 root 1.37 #define ecb_is_constant(expr) 0
374 sf-exg 1.138 #endif
375    
376     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
377     #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
378     #else
379 root 1.37 #define ecb_expect(expr,value) (expr)
380 sf-exg 1.138 #endif
381    
382     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
383     #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
384     #else
385 root 1.37 #define ecb_prefetch(addr,rw,locality)
386 root 1.1 #endif
387    
388 root 1.2 /* no emulation for ecb_decltype */
389 root 1.143 #if ECB_CPP11
390 root 1.144 // older implementations might have problems with decltype(x)::type, work around it
391 root 1.146 template<class T> struct ecb_decltype_t { typedef T type; };
392     #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
393 root 1.143 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
394     #define ecb_decltype(x) __typeof__ (x)
395 root 1.1 #endif
396    
397 root 1.135 #if _MSC_VER >= 1300
398 root 1.149 #define ecb_deprecated __declspec (deprecated)
399 root 1.135 #else
400     #define ecb_deprecated ecb_attribute ((__deprecated__))
401     #endif
402    
403 sf-exg 1.162 #if _MSC_VER >= 1500
404 root 1.154 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
405     #elif ECB_GCC_VERSION(4,5)
406     #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
407     #else
408     #define ecb_deprecated_message(msg) ecb_deprecated
409     #endif
410    
411     #if _MSC_VER >= 1400
412     #define ecb_noinline __declspec (noinline)
413     #else
414     #define ecb_noinline ecb_attribute ((__noinline__))
415     #endif
416    
417 root 1.24 #define ecb_unused ecb_attribute ((__unused__))
418     #define ecb_const ecb_attribute ((__const__))
419     #define ecb_pure ecb_attribute ((__pure__))
420 root 1.35
421 root 1.145 #if ECB_C11 || __IBMC_NORETURN
422 sf-exg 1.165 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
423 root 1.90 #define ecb_noreturn _Noreturn
424 root 1.153 #elif ECB_CPP11
425     #define ecb_noreturn [[noreturn]]
426     #elif _MSC_VER >= 1200
427 sf-exg 1.156 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
428 root 1.153 #define ecb_noreturn __declspec (noreturn)
429 root 1.90 #else
430     #define ecb_noreturn ecb_attribute ((__noreturn__))
431     #endif
432    
433 root 1.35 #if ECB_GCC_VERSION(4,3)
434 root 1.39 #define ecb_artificial ecb_attribute ((__artificial__))
435     #define ecb_hot ecb_attribute ((__hot__))
436     #define ecb_cold ecb_attribute ((__cold__))
437 root 1.35 #else
438     #define ecb_artificial
439     #define ecb_hot
440     #define ecb_cold
441     #endif
442 root 1.1
443 root 1.39 /* put around conditional expressions if you are very sure that the */
444     /* expression is mostly true or mostly false. note that these return */
445     /* booleans, not the expression. */
446 root 1.33 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
447     #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
448 root 1.36 /* for compatibility to the rest of the world */
449 root 1.33 #define ecb_likely(expr) ecb_expect_true (expr)
450     #define ecb_unlikely(expr) ecb_expect_false (expr)
451 root 1.1
452 root 1.3 /* count trailing zero bits and count # of one bits */
453 root 1.139 #if ECB_GCC_VERSION(3,4) \
454     || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
455     && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
456     && ECB_CLANG_BUILTIN(__builtin_popcount))
457 root 1.49 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
458     #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
459     #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
460 root 1.35 #define ecb_ctz32(x) __builtin_ctz (x)
461 root 1.49 #define ecb_ctz64(x) __builtin_ctzll (x)
462 root 1.35 #define ecb_popcount32(x) __builtin_popcount (x)
463 root 1.49 /* no popcountll */
464 root 1.1 #else
465 root 1.151 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
466     ecb_function_ ecb_const int
467 root 1.35 ecb_ctz32 (uint32_t x)
468     {
469 root 1.171 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
470 root 1.172 unsigned long r;
471 root 1.171 _BitScanForward (&r, x);
472     return (int)r;
473     #else
474 root 1.35 int r = 0;
475    
476 root 1.48 x &= ~x + 1; /* this isolates the lowest bit */
477 root 1.35
478 root 1.50 #if ECB_branchless_on_i386
479     r += !!(x & 0xaaaaaaaa) << 0;
480     r += !!(x & 0xcccccccc) << 1;
481     r += !!(x & 0xf0f0f0f0) << 2;
482     r += !!(x & 0xff00ff00) << 3;
483     r += !!(x & 0xffff0000) << 4;
484     #else
485 root 1.35 if (x & 0xaaaaaaaa) r += 1;
486     if (x & 0xcccccccc) r += 2;
487     if (x & 0xf0f0f0f0) r += 4;
488     if (x & 0xff00ff00) r += 8;
489     if (x & 0xffff0000) r += 16;
490 root 1.50 #endif
491 root 1.35
492     return r;
493 root 1.171 #endif
494 root 1.35 }
495    
496 root 1.151 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
497     ecb_function_ ecb_const int
498 root 1.49 ecb_ctz64 (uint64_t x)
499     {
500 root 1.171 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
501 root 1.172 unsigned long r;
502 root 1.171 _BitScanForward64 (&r, x);
503     return (int)r;
504     #else
505 root 1.168 int shift = x & 0xffffffff ? 0 : 32;
506 root 1.50 return ecb_ctz32 (x >> shift) + shift;
507 root 1.171 #endif
508 root 1.49 }
509    
510 root 1.151 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
511     ecb_function_ ecb_const int
512 root 1.35 ecb_popcount32 (uint32_t x)
513     {
514     x -= (x >> 1) & 0x55555555;
515     x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
516     x = ((x >> 4) + x) & 0x0f0f0f0f;
517     x *= 0x01010101;
518 root 1.1
519 root 1.35 return x >> 24;
520     }
521 root 1.49
522 root 1.151 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
523     ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
524 root 1.49 {
525 root 1.171 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
526 root 1.172 unsigned long r;
527 root 1.171 _BitScanReverse (&r, x);
528     return (int)r;
529     #else
530 root 1.50 int r = 0;
531 root 1.49
532 root 1.50 if (x >> 16) { x >>= 16; r += 16; }
533     if (x >> 8) { x >>= 8; r += 8; }
534     if (x >> 4) { x >>= 4; r += 4; }
535     if (x >> 2) { x >>= 2; r += 2; }
536     if (x >> 1) { r += 1; }
537 root 1.49
538     return r;
539 root 1.171 #endif
540 root 1.49 }
541    
542 root 1.151 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
543     ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
544 root 1.49 {
545 root 1.171 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
546 root 1.172 unsigned long r;
547 root 1.171 _BitScanReverse64 (&r, x);
548     return (int)r;
549     #else
550 root 1.50 int r = 0;
551 root 1.49
552 root 1.50 if (x >> 32) { x >>= 32; r += 32; }
553 root 1.49
554 root 1.50 return r + ecb_ld32 (x);
555 root 1.171 #endif
556 root 1.49 }
557 root 1.1 #endif
558    
559 root 1.151 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
560     ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
561     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
562     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
563 root 1.88
564 root 1.151 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
565     ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
566 root 1.70 {
567     return ( (x * 0x0802U & 0x22110U)
568 root 1.151 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
569 root 1.70 }
570    
571 root 1.151 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
572     ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
573 root 1.70 {
574     x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
575     x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
576     x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
577     x = ( x >> 8 ) | ( x << 8);
578    
579     return x;
580     }
581    
582 root 1.151 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
583     ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
584 root 1.70 {
585     x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
586     x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
587     x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
588     x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
589     x = ( x >> 16 ) | ( x << 16);
590    
591     return x;
592     }
593    
594 root 1.49 /* popcount64 is only available on 64 bit cpus as gcc builtin */
595     /* so for this version we are lazy */
596 root 1.151 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
597     ecb_function_ ecb_const int
598 root 1.49 ecb_popcount64 (uint64_t x)
599     {
600     return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
601     }
602    
603 root 1.151 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
604     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
605     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
606     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
607     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
608     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
609     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
610     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
611    
612     ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
613     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
614     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
615     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
616     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
617     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
618     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
619     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
620 root 1.50
621 root 1.182 #if ECB_CPP
622    
623     inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
624     inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
625     inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
626     inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
627    
628     inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
629     inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
630     inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
631     inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
632    
633     inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
634     inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
635     inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
636     inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
637    
638     inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
639     inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
640     inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
641     inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
642    
643     inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
644     inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
645     inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
646    
647 root 1.183 inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
648     inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
649     inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
650     inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
651    
652     inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
653     inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
654     inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
655     inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
656 root 1.182
657     #endif
658    
659 sf-exg 1.138 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
660 root 1.164 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
661     #define ecb_bswap16(x) __builtin_bswap16 (x)
662     #else
663 root 1.49 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
664 root 1.164 #endif
665 root 1.49 #define ecb_bswap32(x) __builtin_bswap32 (x)
666     #define ecb_bswap64(x) __builtin_bswap64 (x)
667 root 1.164 #elif _MSC_VER
668     #include <stdlib.h>
669     #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
670     #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
671     #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
672 root 1.13 #else
673 root 1.151 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
674     ecb_function_ ecb_const uint16_t
675 root 1.50 ecb_bswap16 (uint16_t x)
676 root 1.49 {
677 root 1.50 return ecb_rotl16 (x, 8);
678 root 1.49 }
679    
680 root 1.151 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
681     ecb_function_ ecb_const uint32_t
682 root 1.35 ecb_bswap32 (uint32_t x)
683     {
684 root 1.50 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
685 root 1.35 }
686    
687 root 1.151 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
688     ecb_function_ ecb_const uint64_t
689 root 1.49 ecb_bswap64 (uint64_t x)
690 root 1.35 {
691 root 1.50 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
692 root 1.35 }
693 root 1.13 #endif
694    
695 sf-exg 1.138 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
696 root 1.35 #define ecb_unreachable() __builtin_unreachable ()
697 root 1.13 #else
698 root 1.35 /* this seems to work fine, but gcc always emits a warning for it :/ */
699 root 1.151 ecb_inline ecb_noreturn void ecb_unreachable (void);
700     ecb_inline ecb_noreturn void ecb_unreachable (void) { }
701 root 1.13 #endif
702    
703 root 1.41 /* try to tell the compiler that some condition is definitely true */
704 root 1.100 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
705 root 1.41
706 root 1.174 ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
707     ecb_inline ecb_const uint32_t
708 root 1.23 ecb_byteorder_helper (void)
709 root 1.3 {
710 root 1.98 /* the union code still generates code under pressure in gcc, */
711 sf-exg 1.111 /* but less than using pointers, and always seems to */
712 root 1.98 /* successfully return a constant. */
713     /* the reason why we have this horrible preprocessor mess */
714 root 1.99 /* is to avoid it in all cases, at least on common architectures */
715 sf-exg 1.111 /* or when using a recent enough gcc version (>= 4.6) */
716 root 1.174 #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
717     || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
718     #define ECB_LITTLE_ENDIAN 1
719     return 0x44332211;
720     #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
721     || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
722     #define ECB_BIG_ENDIAN 1
723     return 0x11223344;
724 root 1.98 #else
725     union
726     {
727 root 1.174 uint8_t c[4];
728     uint32_t u;
729     } u = { 0x11, 0x22, 0x33, 0x44 };
730     return u.u;
731 root 1.98 #endif
732 root 1.3 }
733    
734 root 1.151 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
735 root 1.174 ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
736 root 1.151 ecb_inline ecb_const ecb_bool ecb_little_endian (void);
737 root 1.174 ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
738 root 1.3
739 root 1.180 /*****************************************************************************/
740     /* unaligned load/store */
741    
742     ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
743     ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
744     ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
745    
746     ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
747     ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
748     ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
749    
750     ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
751     ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
752     ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
753    
754     ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
755     ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
756     ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
757    
758     ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
759     ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
760     ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
761    
762     ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
763     ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
764     ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
765    
766     ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
767     ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
768     ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
769    
770     ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
771     ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
772     ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
773    
774     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)); }
775     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)); }
776     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)); }
777    
778     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)); }
779     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)); }
780     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)); }
781    
782 root 1.186 #if ECB_CPP
783 root 1.180
784     inline uint8_t ecb_bswap (uint8_t v) { return v; }
785     inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
786     inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
787     inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
788    
789     template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
790     template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
791     template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
792     template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
793     template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
794 root 1.184 template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
795 root 1.180 template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
796     template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
797    
798     template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
799     template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
800     template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
801     template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
802     template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
803 root 1.184 template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
804 root 1.180 template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
805     template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
806    
807     #endif
808    
809     /*****************************************************************************/
810 root 1.188 /* division */
811 root 1.180
812 root 1.39 #if ECB_GCC_VERSION(3,0) || ECB_C99
813 root 1.188 /* C99 tightened the definition of %, so we can use a more efficient version */
814 root 1.35 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
815 root 1.31 #else
816 root 1.35 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
817 root 1.31 #endif
818 root 1.21
819 root 1.149 #if ECB_CPP
820 sf-exg 1.68 template<typename T>
821     static inline T ecb_div_rd (T val, T div)
822     {
823     return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
824     }
825     template<typename T>
826     static inline T ecb_div_ru (T val, T div)
827     {
828     return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
829     }
830     #else
831     #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
832     #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
833     #endif
834 sf-exg 1.67
835 root 1.188 /*****************************************************************************/
836     /* array length */
837    
838 root 1.5 #if ecb_cplusplus_does_not_suck
839 root 1.40 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
840 root 1.35 template<typename T, int N>
841     static inline int ecb_array_length (const T (&arr)[N])
842     {
843     return N;
844     }
845 root 1.5 #else
846 root 1.35 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
847 root 1.5 #endif
848    
849 root 1.180 /*****************************************************************************/
850 root 1.188 /* IEEE 754-2008 half float conversions */
851 root 1.180
852 root 1.170 ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
853 root 1.167 ecb_function_ ecb_const uint32_t
854 root 1.170 ecb_binary16_to_binary32 (uint32_t x)
855 root 1.167 {
856     unsigned int s = (x & 0x8000) << (31 - 15);
857     int e = (x >> 10) & 0x001f;
858     unsigned int m = x & 0x03ff;
859    
860     if (ecb_expect_false (e == 31))
861     /* infinity or NaN */
862     e = 255 - (127 - 15);
863     else if (ecb_expect_false (!e))
864     {
865     if (ecb_expect_true (!m))
866     /* zero, handled by code below by forcing e to 0 */
867     e = 0 - (127 - 15);
868     else
869     {
870     /* subnormal, renormalise */
871     unsigned int s = 10 - ecb_ld32 (m);
872    
873     m = (m << s) & 0x3ff; /* mask implicit bit */
874     e -= s - 1;
875     }
876     }
877    
878     /* e and m now are normalised, or zero, (or inf or nan) */
879     e += 127 - 15;
880    
881     return s | (e << 23) | (m << (23 - 10));
882     }
883    
884     ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
885     ecb_function_ ecb_const uint16_t
886     ecb_binary32_to_binary16 (uint32_t x)
887     {
888     unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
889 root 1.188 int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
890 root 1.167 unsigned int m = x & 0x007fffff;
891    
892     x &= 0x7fffffff;
893    
894     /* if it's within range of binary16 normals, use fast path */
895     if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
896     {
897     /* mantissa round-to-even */
898     m += 0x00000fff + ((m >> (23 - 10)) & 1);
899    
900     /* handle overflow */
901     if (ecb_expect_false (m >= 0x00800000))
902     {
903     m >>= 1;
904     e += 1;
905     }
906    
907     return s | (e << 10) | (m >> (23 - 10));
908     }
909    
910     /* handle large numbers and infinity */
911     if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
912     return s | 0x7c00;
913    
914 root 1.169 /* handle zero, subnormals and small numbers */
915 root 1.167 if (ecb_expect_true (x < 0x38800000))
916     {
917     /* zero */
918     if (ecb_expect_true (!x))
919     return s;
920    
921     /* handle subnormals */
922    
923 root 1.169 /* too small, will be zero */
924     if (e < (14 - 24)) /* might not be sharp, but is good enough */
925     return s;
926    
927 root 1.167 m |= 0x00800000; /* make implicit bit explicit */
928    
929     /* very tricky - we need to round to the nearest e (+10) bit value */
930     {
931     unsigned int bits = 14 - e;
932     unsigned int half = (1 << (bits - 1)) - 1;
933     unsigned int even = (m >> bits) & 1;
934    
935     /* if this overflows, we will end up with a normalised number */
936     m = (m + half + even) >> bits;
937     }
938    
939     return s | m;
940     }
941    
942     /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
943     m >>= 13;
944    
945     return s | 0x7c00 | m | !m;
946     }
947    
948 root 1.104 /*******************************************************************************/
949     /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
950    
951     /* basically, everything uses "ieee pure-endian" floating point numbers */
952     /* the only noteworthy exception is ancient armle, which uses order 43218765 */
953     #if 0 \
954     || __i386 || __i386__ \
955 sf-exg 1.159 || ECB_GCC_AMD64 \
956 root 1.104 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
957     || defined __s390__ || defined __s390x__ \
958     || defined __mips__ \
959     || defined __alpha__ \
960     || defined __hppa__ \
961     || defined __ia64__ \
962 root 1.117 || defined __m68k__ \
963     || defined __m88k__ \
964     || defined __sh__ \
965 sf-exg 1.159 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
966 root 1.131 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
967 root 1.132 || defined __aarch64__
968 root 1.104 #define ECB_STDFP 1
969 root 1.102 #else
970 root 1.104 #define ECB_STDFP 0
971 root 1.102 #endif
972    
973 root 1.104 #ifndef ECB_NO_LIBM
974 root 1.103
975 root 1.121 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
976    
977 root 1.122 /* only the oldest of old doesn't have this one. solaris. */
978     #ifdef INFINITY
979     #define ECB_INFINITY INFINITY
980     #else
981     #define ECB_INFINITY HUGE_VAL
982     #endif
983    
984     #ifdef NAN
985 root 1.121 #define ECB_NAN NAN
986     #else
987 root 1.122 #define ECB_NAN ECB_INFINITY
988 root 1.121 #endif
989 root 1.120
990 root 1.148 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
991 root 1.150 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
992 sf-exg 1.163 #define ecb_frexpf(x,e) frexpf ((x), (e))
993 root 1.148 #else
994 sf-exg 1.161 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
995 sf-exg 1.163 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
996 root 1.148 #endif
997    
998 root 1.104 /* convert a float to ieee single/binary32 */
999 root 1.151 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1000     ecb_function_ ecb_const uint32_t
1001 root 1.103 ecb_float_to_binary32 (float x)
1002     {
1003     uint32_t r;
1004    
1005     #if ECB_STDFP
1006 root 1.104 memcpy (&r, &x, 4);
1007 root 1.103 #else
1008 root 1.105 /* slow emulation, works for anything but -0 */
1009 root 1.103 uint32_t m;
1010     int e;
1011    
1012 root 1.108 if (x == 0e0f ) return 0x00000000U;
1013 root 1.103 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1014     if (x < -3.40282346638528860e+38f) return 0xff800000U;
1015 root 1.105 if (x != x ) return 0x7fbfffffU;
1016 root 1.103
1017 sf-exg 1.163 m = ecb_frexpf (x, &e) * 0x1000000U;
1018 root 1.103
1019     r = m & 0x80000000U;
1020    
1021     if (r)
1022     m = -m;
1023    
1024 root 1.108 if (e <= -126)
1025 root 1.103 {
1026     m &= 0xffffffU;
1027     m >>= (-125 - e);
1028     e = -126;
1029     }
1030    
1031     r |= (e + 126) << 23;
1032     r |= m & 0x7fffffU;
1033     #endif
1034    
1035     return r;
1036     }
1037    
1038 root 1.104 /* converts an ieee single/binary32 to a float */
1039 root 1.151 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1040     ecb_function_ ecb_const float
1041 root 1.103 ecb_binary32_to_float (uint32_t x)
1042     {
1043     float r;
1044    
1045     #if ECB_STDFP
1046 root 1.104 memcpy (&r, &x, 4);
1047 root 1.103 #else
1048     /* emulation, only works for normals and subnormals and +0 */
1049     int neg = x >> 31;
1050     int e = (x >> 23) & 0xffU;
1051    
1052     x &= 0x7fffffU;
1053    
1054     if (e)
1055     x |= 0x800000U;
1056 root 1.104 else
1057     e = 1;
1058 root 1.103
1059     /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1060 root 1.148 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1061 root 1.103
1062     r = neg ? -r : r;
1063     #endif
1064    
1065     return r;
1066     }
1067    
1068 root 1.104 /* convert a double to ieee double/binary64 */
1069 root 1.151 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1070     ecb_function_ ecb_const uint64_t
1071 root 1.103 ecb_double_to_binary64 (double x)
1072     {
1073 root 1.104 uint64_t r;
1074    
1075     #if ECB_STDFP
1076     memcpy (&r, &x, 8);
1077     #else
1078 root 1.105 /* slow emulation, works for anything but -0 */
1079 root 1.104 uint64_t m;
1080     int e;
1081    
1082 root 1.108 if (x == 0e0 ) return 0x0000000000000000U;
1083 root 1.104 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1084     if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1085 root 1.105 if (x != x ) return 0X7ff7ffffffffffffU;
1086 root 1.104
1087     m = frexp (x, &e) * 0x20000000000000U;
1088    
1089     r = m & 0x8000000000000000;;
1090    
1091     if (r)
1092     m = -m;
1093    
1094 root 1.108 if (e <= -1022)
1095 root 1.104 {
1096     m &= 0x1fffffffffffffU;
1097     m >>= (-1021 - e);
1098     e = -1022;
1099     }
1100    
1101     r |= ((uint64_t)(e + 1022)) << 52;
1102     r |= m & 0xfffffffffffffU;
1103     #endif
1104    
1105     return r;
1106     }
1107    
1108     /* converts an ieee double/binary64 to a double */
1109 root 1.151 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1110     ecb_function_ ecb_const double
1111 root 1.104 ecb_binary64_to_double (uint64_t x)
1112     {
1113     double r;
1114    
1115     #if ECB_STDFP
1116     memcpy (&r, &x, 8);
1117     #else
1118     /* emulation, only works for normals and subnormals and +0 */
1119     int neg = x >> 63;
1120     int e = (x >> 52) & 0x7ffU;
1121    
1122     x &= 0xfffffffffffffU;
1123    
1124     if (e)
1125     x |= 0x10000000000000U;
1126     else
1127     e = 1;
1128    
1129 root 1.107 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1130 root 1.108 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1131 root 1.104
1132     r = neg ? -r : r;
1133     #endif
1134    
1135     return r;
1136 root 1.103 }
1137    
1138 root 1.167 /* convert a float to ieee half/binary16 */
1139     ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1140     ecb_function_ ecb_const uint16_t
1141     ecb_float_to_binary16 (float x)
1142     {
1143     return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1144     }
1145    
1146     /* convert an ieee half/binary16 to float */
1147     ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1148     ecb_function_ ecb_const float
1149     ecb_binary16_to_float (uint16_t x)
1150     {
1151     return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1152     }
1153    
1154 root 1.103 #endif
1155 root 1.102
1156 root 1.1 #endif
1157