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Revision: 1.187
Committed: Sat Jan 25 19:34:53 2020 UTC (4 years, 5 months ago) by root
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Branch: MAIN
Changes since 1.186: +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 1.185 * Copyright (©) 2009-2015,2018-2020 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 1.184 #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 1.12 /* many compilers define _GNUC_ to some versions but then only implement
110     * what their idiot authors think are the "more important" extensions,
111 sf-exg 1.59 * causing enormous grief in return for some better fake benchmark numbers.
112 root 1.18 * or so.
113 root 1.12 * we try to detect these and simply assume they are not gcc - if they have
114     * an issue with that they should have done it right in the first place.
115     */
116 root 1.137 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
117     #define ECB_GCC_VERSION(major,minor) 0
118     #else
119     #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
120 root 1.12 #endif
121 root 1.1
122 sf-exg 1.138 #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
123    
124 root 1.147 #if __clang__ && defined __has_builtin
125     #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
126 sf-exg 1.138 #else
127     #define ECB_CLANG_BUILTIN(x) 0
128     #endif
129    
130 root 1.147 #if __clang__ && defined __has_extension
131     #define ECB_CLANG_EXTENSION(x) __has_extension (x)
132 sf-exg 1.140 #else
133     #define ECB_CLANG_EXTENSION(x) 0
134     #endif
135    
136 root 1.91 #define ECB_CPP (__cplusplus+0)
137     #define ECB_CPP11 (__cplusplus >= 201103L)
138 root 1.177 #define ECB_CPP14 (__cplusplus >= 201402L)
139     #define ECB_CPP17 (__cplusplus >= 201703L)
140 root 1.90
141 root 1.102 #if ECB_CPP
142 root 1.127 #define ECB_C 0
143     #define ECB_STDC_VERSION 0
144     #else
145     #define ECB_C 1
146     #define ECB_STDC_VERSION __STDC_VERSION__
147     #endif
148    
149     #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
150     #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
151 root 1.177 #define ECB_C17 (ECB_STDC_VERSION >= 201710L)
152 root 1.127
153     #if ECB_CPP
154 root 1.102 #define ECB_EXTERN_C extern "C"
155     #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
156     #define ECB_EXTERN_C_END }
157     #else
158     #define ECB_EXTERN_C extern
159     #define ECB_EXTERN_C_BEG
160     #define ECB_EXTERN_C_END
161     #endif
162    
163 root 1.52 /*****************************************************************************/
164    
165 root 1.58 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
166     /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
167    
168 root 1.79 #if ECB_NO_THREADS
169 root 1.95 #define ECB_NO_SMP 1
170 root 1.79 #endif
171    
172 root 1.93 #if ECB_NO_SMP
173 root 1.64 #define ECB_MEMORY_FENCE do { } while (0)
174 root 1.58 #endif
175    
176 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 */
177     #if __xlC__ && ECB_CPP
178     #include <builtins.h>
179     #endif
180    
181 root 1.171 #if 1400 <= _MSC_VER
182     #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
183     #endif
184    
185 root 1.52 #ifndef ECB_MEMORY_FENCE
186 root 1.85 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
187 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
188 root 1.73 #if __i386 || __i386__
189 root 1.54 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
190 root 1.94 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
191 root 1.176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
192 sf-exg 1.159 #elif ECB_GCC_AMD64
193 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
194     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
195 root 1.176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
196 root 1.63 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
197 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
198 root 1.175 #elif defined __ARM_ARCH_2__ \
199     || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
200     || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
201     || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
202     || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
203     || defined __ARM_ARCH_5TEJ__
204     /* should not need any, unless running old code on newer cpu - arm doesn't support that */
205 root 1.85 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
206 root 1.175 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
207     || defined __ARM_ARCH_6T2__
208 root 1.84 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
209 root 1.85 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
210 root 1.175 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
211 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
212 root 1.129 #elif __aarch64__
213     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
214 root 1.166 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
215 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
216     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
217     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
218 root 1.85 #elif defined __s390__ || defined __s390x__
219 root 1.77 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
220 root 1.85 #elif defined __mips__
221 root 1.118 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
222 root 1.116 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
223     #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
224 root 1.86 #elif defined __alpha__
225 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
226     #elif defined __hppa__
227     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
228     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
229     #elif defined __ia64__
230     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
231 root 1.117 #elif defined __m68k__
232     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
233     #elif defined __m88k__
234     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
235     #elif defined __sh__
236     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
237 root 1.52 #endif
238     #endif
239     #endif
240    
241     #ifndef ECB_MEMORY_FENCE
242 root 1.93 #if ECB_GCC_VERSION(4,7)
243 root 1.97 /* see comment below (stdatomic.h) about the C11 memory model. */
244 root 1.93 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
245 root 1.128 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
246     #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
247 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
248 root 1.110
249 sf-exg 1.140 #elif ECB_CLANG_EXTENSION(c_atomic)
250     /* see comment below (stdatomic.h) about the C11 memory model. */
251     #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
252     #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
253     #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
254 root 1.178 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
255 root 1.110
256 root 1.93 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
257 root 1.52 #define ECB_MEMORY_FENCE __sync_synchronize ()
258 root 1.126 #elif _MSC_VER >= 1500 /* VC++ 2008 */
259     /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
260     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
261     #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
262     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
263     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
264 root 1.57 #elif _MSC_VER >= 1400 /* VC++ 2005 */
265     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
266     #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
267     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
268     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
269 root 1.85 #elif defined _WIN32
270 root 1.55 #include <WinNT.h>
271 root 1.57 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
272 root 1.72 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
273     #include <mbarrier.h>
274 root 1.178 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
275     #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
276     #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
277     #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
278 root 1.82 #elif __xlC__
279 root 1.83 #define ECB_MEMORY_FENCE __sync ()
280 root 1.52 #endif
281     #endif
282    
283 root 1.53 #ifndef ECB_MEMORY_FENCE
284 root 1.94 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
285     /* we assume that these memory fences work on all variables/all memory accesses, */
286     /* not just C11 atomics and atomic accesses */
287     #include <stdatomic.h>
288     #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
289 root 1.178 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
290     #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
291 root 1.94 #endif
292     #endif
293    
294     #ifndef ECB_MEMORY_FENCE
295 root 1.62 #if !ECB_AVOID_PTHREADS
296     /*
297     * if you get undefined symbol references to pthread_mutex_lock,
298     * or failure to find pthread.h, then you should implement
299     * the ECB_MEMORY_FENCE operations for your cpu/compiler
300     * OR provide pthread.h and link against the posix thread library
301     * of your system.
302     */
303     #include <pthread.h>
304     #define ECB_NEEDS_PTHREADS 1
305     #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
306 root 1.52
307 root 1.62 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
308     #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
309     #endif
310     #endif
311    
312 root 1.85 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
313 root 1.52 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
314 root 1.62 #endif
315    
316 root 1.85 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
317 root 1.52 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
318     #endif
319    
320 root 1.178 #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
321     #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
322     #endif
323    
324 root 1.52 /*****************************************************************************/
325    
326 root 1.149 #if ECB_CPP
327 root 1.46 #define ecb_inline static inline
328 root 1.38 #elif ECB_GCC_VERSION(2,5)
329 root 1.46 #define ecb_inline static __inline__
330 root 1.39 #elif ECB_C99
331 root 1.46 #define ecb_inline static inline
332 root 1.29 #else
333 root 1.46 #define ecb_inline static
334 root 1.38 #endif
335    
336     #if ECB_GCC_VERSION(3,3)
337     #define ecb_restrict __restrict__
338 root 1.39 #elif ECB_C99
339 root 1.38 #define ecb_restrict restrict
340     #else
341     #define ecb_restrict
342 root 1.4 #endif
343    
344 root 1.38 typedef int ecb_bool;
345    
346 root 1.8 #define ECB_CONCAT_(a, b) a ## b
347     #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
348     #define ECB_STRINGIFY_(a) # a
349     #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
350 root 1.155 #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
351 root 1.8
352 root 1.46 #define ecb_function_ ecb_inline
353 root 1.3
354 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
355 root 1.142 #define ecb_attribute(attrlist) __attribute__ (attrlist)
356 root 1.37 #else
357     #define ecb_attribute(attrlist)
358 sf-exg 1.138 #endif
359 root 1.127
360 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
361     #define ecb_is_constant(expr) __builtin_constant_p (expr)
362     #else
363 root 1.127 /* possible C11 impl for integral types
364     typedef struct ecb_is_constant_struct ecb_is_constant_struct;
365     #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
366    
367 root 1.37 #define ecb_is_constant(expr) 0
368 sf-exg 1.138 #endif
369    
370     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
371     #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
372     #else
373 root 1.37 #define ecb_expect(expr,value) (expr)
374 sf-exg 1.138 #endif
375    
376     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
377     #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
378     #else
379 root 1.37 #define ecb_prefetch(addr,rw,locality)
380 root 1.1 #endif
381    
382 root 1.2 /* no emulation for ecb_decltype */
383 root 1.143 #if ECB_CPP11
384 root 1.144 // older implementations might have problems with decltype(x)::type, work around it
385 root 1.146 template<class T> struct ecb_decltype_t { typedef T type; };
386     #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
387 root 1.143 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
388     #define ecb_decltype(x) __typeof__ (x)
389 root 1.1 #endif
390    
391 root 1.135 #if _MSC_VER >= 1300
392 root 1.149 #define ecb_deprecated __declspec (deprecated)
393 root 1.135 #else
394     #define ecb_deprecated ecb_attribute ((__deprecated__))
395     #endif
396    
397 sf-exg 1.162 #if _MSC_VER >= 1500
398 root 1.154 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
399     #elif ECB_GCC_VERSION(4,5)
400     #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
401     #else
402     #define ecb_deprecated_message(msg) ecb_deprecated
403     #endif
404    
405     #if _MSC_VER >= 1400
406     #define ecb_noinline __declspec (noinline)
407     #else
408     #define ecb_noinline ecb_attribute ((__noinline__))
409     #endif
410    
411 root 1.24 #define ecb_unused ecb_attribute ((__unused__))
412     #define ecb_const ecb_attribute ((__const__))
413     #define ecb_pure ecb_attribute ((__pure__))
414 root 1.35
415 root 1.145 #if ECB_C11 || __IBMC_NORETURN
416 sf-exg 1.165 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
417 root 1.90 #define ecb_noreturn _Noreturn
418 root 1.153 #elif ECB_CPP11
419     #define ecb_noreturn [[noreturn]]
420     #elif _MSC_VER >= 1200
421 sf-exg 1.156 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
422 root 1.153 #define ecb_noreturn __declspec (noreturn)
423 root 1.90 #else
424     #define ecb_noreturn ecb_attribute ((__noreturn__))
425     #endif
426    
427 root 1.35 #if ECB_GCC_VERSION(4,3)
428 root 1.39 #define ecb_artificial ecb_attribute ((__artificial__))
429     #define ecb_hot ecb_attribute ((__hot__))
430     #define ecb_cold ecb_attribute ((__cold__))
431 root 1.35 #else
432     #define ecb_artificial
433     #define ecb_hot
434     #define ecb_cold
435     #endif
436 root 1.1
437 root 1.39 /* put around conditional expressions if you are very sure that the */
438     /* expression is mostly true or mostly false. note that these return */
439     /* booleans, not the expression. */
440 root 1.33 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
441     #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
442 root 1.36 /* for compatibility to the rest of the world */
443 root 1.33 #define ecb_likely(expr) ecb_expect_true (expr)
444     #define ecb_unlikely(expr) ecb_expect_false (expr)
445 root 1.1
446 root 1.3 /* count trailing zero bits and count # of one bits */
447 root 1.139 #if ECB_GCC_VERSION(3,4) \
448     || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
449     && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
450     && ECB_CLANG_BUILTIN(__builtin_popcount))
451 root 1.49 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
452     #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
453     #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
454 root 1.35 #define ecb_ctz32(x) __builtin_ctz (x)
455 root 1.49 #define ecb_ctz64(x) __builtin_ctzll (x)
456 root 1.35 #define ecb_popcount32(x) __builtin_popcount (x)
457 root 1.49 /* no popcountll */
458 root 1.1 #else
459 root 1.151 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
460     ecb_function_ ecb_const int
461 root 1.35 ecb_ctz32 (uint32_t x)
462     {
463 root 1.171 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
464 root 1.172 unsigned long r;
465 root 1.171 _BitScanForward (&r, x);
466     return (int)r;
467     #else
468 root 1.35 int r = 0;
469    
470 root 1.48 x &= ~x + 1; /* this isolates the lowest bit */
471 root 1.35
472 root 1.50 #if ECB_branchless_on_i386
473     r += !!(x & 0xaaaaaaaa) << 0;
474     r += !!(x & 0xcccccccc) << 1;
475     r += !!(x & 0xf0f0f0f0) << 2;
476     r += !!(x & 0xff00ff00) << 3;
477     r += !!(x & 0xffff0000) << 4;
478     #else
479 root 1.35 if (x & 0xaaaaaaaa) r += 1;
480     if (x & 0xcccccccc) r += 2;
481     if (x & 0xf0f0f0f0) r += 4;
482     if (x & 0xff00ff00) r += 8;
483     if (x & 0xffff0000) r += 16;
484 root 1.50 #endif
485 root 1.35
486     return r;
487 root 1.171 #endif
488 root 1.35 }
489    
490 root 1.151 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
491     ecb_function_ ecb_const int
492 root 1.49 ecb_ctz64 (uint64_t x)
493     {
494 root 1.171 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
495 root 1.172 unsigned long r;
496 root 1.171 _BitScanForward64 (&r, x);
497     return (int)r;
498     #else
499 root 1.168 int shift = x & 0xffffffff ? 0 : 32;
500 root 1.50 return ecb_ctz32 (x >> shift) + shift;
501 root 1.171 #endif
502 root 1.49 }
503    
504 root 1.151 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
505     ecb_function_ ecb_const int
506 root 1.35 ecb_popcount32 (uint32_t x)
507     {
508     x -= (x >> 1) & 0x55555555;
509     x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
510     x = ((x >> 4) + x) & 0x0f0f0f0f;
511     x *= 0x01010101;
512 root 1.1
513 root 1.35 return x >> 24;
514     }
515 root 1.49
516 root 1.151 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
517     ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
518 root 1.49 {
519 root 1.171 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
520 root 1.172 unsigned long r;
521 root 1.171 _BitScanReverse (&r, x);
522     return (int)r;
523     #else
524 root 1.50 int r = 0;
525 root 1.49
526 root 1.50 if (x >> 16) { x >>= 16; r += 16; }
527     if (x >> 8) { x >>= 8; r += 8; }
528     if (x >> 4) { x >>= 4; r += 4; }
529     if (x >> 2) { x >>= 2; r += 2; }
530     if (x >> 1) { r += 1; }
531 root 1.49
532     return r;
533 root 1.171 #endif
534 root 1.49 }
535    
536 root 1.151 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
537     ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
538 root 1.49 {
539 root 1.171 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
540 root 1.172 unsigned long r;
541 root 1.171 _BitScanReverse64 (&r, x);
542     return (int)r;
543     #else
544 root 1.50 int r = 0;
545 root 1.49
546 root 1.50 if (x >> 32) { x >>= 32; r += 32; }
547 root 1.49
548 root 1.50 return r + ecb_ld32 (x);
549 root 1.171 #endif
550 root 1.49 }
551 root 1.1 #endif
552    
553 root 1.151 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
554     ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
555     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
556     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
557 root 1.88
558 root 1.151 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
559     ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
560 root 1.70 {
561     return ( (x * 0x0802U & 0x22110U)
562 root 1.151 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
563 root 1.70 }
564    
565 root 1.151 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
566     ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
567 root 1.70 {
568     x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
569     x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
570     x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
571     x = ( x >> 8 ) | ( x << 8);
572    
573     return x;
574     }
575    
576 root 1.151 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
577     ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
578 root 1.70 {
579     x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
580     x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
581     x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
582     x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
583     x = ( x >> 16 ) | ( x << 16);
584    
585     return x;
586     }
587    
588 root 1.49 /* popcount64 is only available on 64 bit cpus as gcc builtin */
589     /* so for this version we are lazy */
590 root 1.151 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
591     ecb_function_ ecb_const int
592 root 1.49 ecb_popcount64 (uint64_t x)
593     {
594     return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
595     }
596    
597 root 1.151 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
598     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
599     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
600     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
601     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
602     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
603     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
604     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
605    
606     ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
607     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
608     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
609     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
610     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
611     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
612     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
613     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
614 root 1.50
615 root 1.182 #if ECB_CPP
616    
617     inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
618     inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
619     inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
620     inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
621    
622     inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
623     inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
624     inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
625     inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
626    
627     inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
628     inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
629     inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
630     inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
631    
632     inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
633     inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
634     inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
635     inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
636    
637     inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
638     inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
639     inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
640    
641 root 1.183 inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
642     inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
643     inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
644     inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
645    
646     inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
647     inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
648     inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
649     inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
650 root 1.182
651     #endif
652    
653 sf-exg 1.138 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
654 root 1.164 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
655     #define ecb_bswap16(x) __builtin_bswap16 (x)
656     #else
657 root 1.49 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
658 root 1.164 #endif
659 root 1.49 #define ecb_bswap32(x) __builtin_bswap32 (x)
660     #define ecb_bswap64(x) __builtin_bswap64 (x)
661 root 1.164 #elif _MSC_VER
662     #include <stdlib.h>
663     #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
664     #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
665     #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
666 root 1.13 #else
667 root 1.151 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
668     ecb_function_ ecb_const uint16_t
669 root 1.50 ecb_bswap16 (uint16_t x)
670 root 1.49 {
671 root 1.50 return ecb_rotl16 (x, 8);
672 root 1.49 }
673    
674 root 1.151 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
675     ecb_function_ ecb_const uint32_t
676 root 1.35 ecb_bswap32 (uint32_t x)
677     {
678 root 1.50 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
679 root 1.35 }
680    
681 root 1.151 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
682     ecb_function_ ecb_const uint64_t
683 root 1.49 ecb_bswap64 (uint64_t x)
684 root 1.35 {
685 root 1.50 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
686 root 1.35 }
687 root 1.13 #endif
688    
689 sf-exg 1.138 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
690 root 1.35 #define ecb_unreachable() __builtin_unreachable ()
691 root 1.13 #else
692 root 1.35 /* this seems to work fine, but gcc always emits a warning for it :/ */
693 root 1.151 ecb_inline ecb_noreturn void ecb_unreachable (void);
694     ecb_inline ecb_noreturn void ecb_unreachable (void) { }
695 root 1.13 #endif
696    
697 root 1.41 /* try to tell the compiler that some condition is definitely true */
698 root 1.100 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
699 root 1.41
700 root 1.174 ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
701     ecb_inline ecb_const uint32_t
702 root 1.23 ecb_byteorder_helper (void)
703 root 1.3 {
704 root 1.98 /* the union code still generates code under pressure in gcc, */
705 sf-exg 1.111 /* but less than using pointers, and always seems to */
706 root 1.98 /* successfully return a constant. */
707     /* the reason why we have this horrible preprocessor mess */
708 root 1.99 /* is to avoid it in all cases, at least on common architectures */
709 sf-exg 1.111 /* or when using a recent enough gcc version (>= 4.6) */
710 root 1.174 #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
711     || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
712     #define ECB_LITTLE_ENDIAN 1
713     return 0x44332211;
714     #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
715     || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
716     #define ECB_BIG_ENDIAN 1
717     return 0x11223344;
718 root 1.98 #else
719     union
720     {
721 root 1.174 uint8_t c[4];
722     uint32_t u;
723     } u = { 0x11, 0x22, 0x33, 0x44 };
724     return u.u;
725 root 1.98 #endif
726 root 1.3 }
727    
728 root 1.151 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
729 root 1.174 ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
730 root 1.151 ecb_inline ecb_const ecb_bool ecb_little_endian (void);
731 root 1.174 ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
732 root 1.3
733 root 1.180 /*****************************************************************************/
734     /* unaligned load/store */
735    
736     ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
737     ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
738     ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
739    
740     ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
741     ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
742     ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
743    
744     ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
745     ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
746     ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
747    
748     ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
749     ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
750     ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
751    
752     ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
753     ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
754     ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
755    
756     ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
757     ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
758     ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
759    
760     ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
761     ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
762     ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
763    
764     ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
765     ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
766     ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
767    
768     ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
769     ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
770     ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
771    
772     ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
773     ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
774     ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
775    
776 root 1.186 #if ECB_CPP
777 root 1.180
778     inline uint8_t ecb_bswap (uint8_t v) { return v; }
779     inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
780     inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
781     inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
782    
783     template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
784     template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
785     template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
786     template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
787     template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
788 root 1.184 template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
789 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)); }
790     template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
791    
792     template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
793     template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
794     template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
795     template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
796     template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
797 root 1.184 template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
798 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)); }
799     template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
800    
801     #endif
802    
803     /*****************************************************************************/
804    
805 root 1.39 #if ECB_GCC_VERSION(3,0) || ECB_C99
806 root 1.35 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
807 root 1.31 #else
808 root 1.35 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
809 root 1.31 #endif
810 root 1.21
811 root 1.149 #if ECB_CPP
812 sf-exg 1.68 template<typename T>
813     static inline T ecb_div_rd (T val, T div)
814     {
815     return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
816     }
817     template<typename T>
818     static inline T ecb_div_ru (T val, T div)
819     {
820     return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
821     }
822     #else
823     #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
824     #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
825     #endif
826 sf-exg 1.67
827 root 1.5 #if ecb_cplusplus_does_not_suck
828 root 1.40 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
829 root 1.35 template<typename T, int N>
830     static inline int ecb_array_length (const T (&arr)[N])
831     {
832     return N;
833     }
834 root 1.5 #else
835 root 1.35 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
836 root 1.5 #endif
837    
838 root 1.180 /*****************************************************************************/
839    
840 root 1.170 ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
841 root 1.167 ecb_function_ ecb_const uint32_t
842 root 1.170 ecb_binary16_to_binary32 (uint32_t x)
843 root 1.167 {
844     unsigned int s = (x & 0x8000) << (31 - 15);
845     int e = (x >> 10) & 0x001f;
846     unsigned int m = x & 0x03ff;
847    
848     if (ecb_expect_false (e == 31))
849     /* infinity or NaN */
850     e = 255 - (127 - 15);
851     else if (ecb_expect_false (!e))
852     {
853     if (ecb_expect_true (!m))
854     /* zero, handled by code below by forcing e to 0 */
855     e = 0 - (127 - 15);
856     else
857     {
858     /* subnormal, renormalise */
859     unsigned int s = 10 - ecb_ld32 (m);
860    
861     m = (m << s) & 0x3ff; /* mask implicit bit */
862     e -= s - 1;
863     }
864     }
865    
866     /* e and m now are normalised, or zero, (or inf or nan) */
867     e += 127 - 15;
868    
869     return s | (e << 23) | (m << (23 - 10));
870     }
871    
872     ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
873     ecb_function_ ecb_const uint16_t
874     ecb_binary32_to_binary16 (uint32_t x)
875     {
876     unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
877     unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
878     unsigned int m = x & 0x007fffff;
879    
880     x &= 0x7fffffff;
881    
882     /* if it's within range of binary16 normals, use fast path */
883     if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
884     {
885     /* mantissa round-to-even */
886     m += 0x00000fff + ((m >> (23 - 10)) & 1);
887    
888     /* handle overflow */
889     if (ecb_expect_false (m >= 0x00800000))
890     {
891     m >>= 1;
892     e += 1;
893     }
894    
895     return s | (e << 10) | (m >> (23 - 10));
896     }
897    
898     /* handle large numbers and infinity */
899     if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
900     return s | 0x7c00;
901    
902 root 1.169 /* handle zero, subnormals and small numbers */
903 root 1.167 if (ecb_expect_true (x < 0x38800000))
904     {
905     /* zero */
906     if (ecb_expect_true (!x))
907     return s;
908    
909     /* handle subnormals */
910    
911 root 1.169 /* too small, will be zero */
912     if (e < (14 - 24)) /* might not be sharp, but is good enough */
913     return s;
914    
915 root 1.167 m |= 0x00800000; /* make implicit bit explicit */
916    
917     /* very tricky - we need to round to the nearest e (+10) bit value */
918     {
919     unsigned int bits = 14 - e;
920     unsigned int half = (1 << (bits - 1)) - 1;
921     unsigned int even = (m >> bits) & 1;
922    
923     /* if this overflows, we will end up with a normalised number */
924     m = (m + half + even) >> bits;
925     }
926    
927     return s | m;
928     }
929    
930     /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
931     m >>= 13;
932    
933     return s | 0x7c00 | m | !m;
934     }
935    
936 root 1.104 /*******************************************************************************/
937     /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
938    
939     /* basically, everything uses "ieee pure-endian" floating point numbers */
940     /* the only noteworthy exception is ancient armle, which uses order 43218765 */
941     #if 0 \
942     || __i386 || __i386__ \
943 sf-exg 1.159 || ECB_GCC_AMD64 \
944 root 1.104 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
945     || defined __s390__ || defined __s390x__ \
946     || defined __mips__ \
947     || defined __alpha__ \
948     || defined __hppa__ \
949     || defined __ia64__ \
950 root 1.117 || defined __m68k__ \
951     || defined __m88k__ \
952     || defined __sh__ \
953 sf-exg 1.159 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
954 root 1.131 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
955 root 1.132 || defined __aarch64__
956 root 1.104 #define ECB_STDFP 1
957 root 1.102 #else
958 root 1.104 #define ECB_STDFP 0
959 root 1.102 #endif
960    
961 root 1.104 #ifndef ECB_NO_LIBM
962 root 1.103
963 root 1.121 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
964    
965 root 1.122 /* only the oldest of old doesn't have this one. solaris. */
966     #ifdef INFINITY
967     #define ECB_INFINITY INFINITY
968     #else
969     #define ECB_INFINITY HUGE_VAL
970     #endif
971    
972     #ifdef NAN
973 root 1.121 #define ECB_NAN NAN
974     #else
975 root 1.122 #define ECB_NAN ECB_INFINITY
976 root 1.121 #endif
977 root 1.120
978 root 1.148 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
979 root 1.150 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
980 sf-exg 1.163 #define ecb_frexpf(x,e) frexpf ((x), (e))
981 root 1.148 #else
982 sf-exg 1.161 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
983 sf-exg 1.163 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
984 root 1.148 #endif
985    
986 root 1.104 /* convert a float to ieee single/binary32 */
987 root 1.151 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
988     ecb_function_ ecb_const uint32_t
989 root 1.103 ecb_float_to_binary32 (float x)
990     {
991     uint32_t r;
992    
993     #if ECB_STDFP
994 root 1.104 memcpy (&r, &x, 4);
995 root 1.103 #else
996 root 1.105 /* slow emulation, works for anything but -0 */
997 root 1.103 uint32_t m;
998     int e;
999    
1000 root 1.108 if (x == 0e0f ) return 0x00000000U;
1001 root 1.103 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1002     if (x < -3.40282346638528860e+38f) return 0xff800000U;
1003 root 1.105 if (x != x ) return 0x7fbfffffU;
1004 root 1.103
1005 sf-exg 1.163 m = ecb_frexpf (x, &e) * 0x1000000U;
1006 root 1.103
1007     r = m & 0x80000000U;
1008    
1009     if (r)
1010     m = -m;
1011    
1012 root 1.108 if (e <= -126)
1013 root 1.103 {
1014     m &= 0xffffffU;
1015     m >>= (-125 - e);
1016     e = -126;
1017     }
1018    
1019     r |= (e + 126) << 23;
1020     r |= m & 0x7fffffU;
1021     #endif
1022    
1023     return r;
1024     }
1025    
1026 root 1.104 /* converts an ieee single/binary32 to a float */
1027 root 1.151 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1028     ecb_function_ ecb_const float
1029 root 1.103 ecb_binary32_to_float (uint32_t x)
1030     {
1031     float r;
1032    
1033     #if ECB_STDFP
1034 root 1.104 memcpy (&r, &x, 4);
1035 root 1.103 #else
1036     /* emulation, only works for normals and subnormals and +0 */
1037     int neg = x >> 31;
1038     int e = (x >> 23) & 0xffU;
1039    
1040     x &= 0x7fffffU;
1041    
1042     if (e)
1043     x |= 0x800000U;
1044 root 1.104 else
1045     e = 1;
1046 root 1.103
1047     /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1048 root 1.148 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1049 root 1.103
1050     r = neg ? -r : r;
1051     #endif
1052    
1053     return r;
1054     }
1055    
1056 root 1.104 /* convert a double to ieee double/binary64 */
1057 root 1.151 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1058     ecb_function_ ecb_const uint64_t
1059 root 1.103 ecb_double_to_binary64 (double x)
1060     {
1061 root 1.104 uint64_t r;
1062    
1063     #if ECB_STDFP
1064     memcpy (&r, &x, 8);
1065     #else
1066 root 1.105 /* slow emulation, works for anything but -0 */
1067 root 1.104 uint64_t m;
1068     int e;
1069    
1070 root 1.108 if (x == 0e0 ) return 0x0000000000000000U;
1071 root 1.104 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1072     if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1073 root 1.105 if (x != x ) return 0X7ff7ffffffffffffU;
1074 root 1.104
1075     m = frexp (x, &e) * 0x20000000000000U;
1076    
1077     r = m & 0x8000000000000000;;
1078    
1079     if (r)
1080     m = -m;
1081    
1082 root 1.108 if (e <= -1022)
1083 root 1.104 {
1084     m &= 0x1fffffffffffffU;
1085     m >>= (-1021 - e);
1086     e = -1022;
1087     }
1088    
1089     r |= ((uint64_t)(e + 1022)) << 52;
1090     r |= m & 0xfffffffffffffU;
1091     #endif
1092    
1093     return r;
1094     }
1095    
1096     /* converts an ieee double/binary64 to a double */
1097 root 1.151 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1098     ecb_function_ ecb_const double
1099 root 1.104 ecb_binary64_to_double (uint64_t x)
1100     {
1101     double r;
1102    
1103     #if ECB_STDFP
1104     memcpy (&r, &x, 8);
1105     #else
1106     /* emulation, only works for normals and subnormals and +0 */
1107     int neg = x >> 63;
1108     int e = (x >> 52) & 0x7ffU;
1109    
1110     x &= 0xfffffffffffffU;
1111    
1112     if (e)
1113     x |= 0x10000000000000U;
1114     else
1115     e = 1;
1116    
1117 root 1.107 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1118 root 1.108 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1119 root 1.104
1120     r = neg ? -r : r;
1121     #endif
1122    
1123     return r;
1124 root 1.103 }
1125    
1126 root 1.167 /* convert a float to ieee half/binary16 */
1127     ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1128     ecb_function_ ecb_const uint16_t
1129     ecb_float_to_binary16 (float x)
1130     {
1131     return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1132     }
1133    
1134     /* convert an ieee half/binary16 to float */
1135     ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1136     ecb_function_ ecb_const float
1137     ecb_binary16_to_float (uint16_t x)
1138     {
1139     return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1140     }
1141    
1142 root 1.103 #endif
1143 root 1.102
1144 root 1.1 #endif
1145