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Revision: 1.154
Committed: Wed Feb 11 20:02:31 2015 UTC (9 years, 4 months ago) by root
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Branch: MAIN
Changes since 1.153: +14 -1 lines
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# User Rev Content
1 root 1.1 /*
2 root 1.17 * libecb - http://software.schmorp.de/pkg/libecb
3 root 1.1 *
4 root 1.152 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
5 root 1.7 * Copyright (©) 2011 Emanuele Giaquinta
6 root 1.1 * All rights reserved.
7     *
8     * Redistribution and use in source and binary forms, with or without modifica-
9     * tion, are permitted provided that the following conditions are met:
10     *
11     * 1. Redistributions of source code must retain the above copyright notice,
12     * this list of conditions and the following disclaimer.
13     *
14     * 2. Redistributions in binary form must reproduce the above copyright
15     * notice, this list of conditions and the following disclaimer in the
16     * documentation and/or other materials provided with the distribution.
17     *
18     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
19     * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
20     * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
21     * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
22     * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23     * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24     * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25     * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26     * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27     * OF THE POSSIBILITY OF SUCH DAMAGE.
28 root 1.133 *
29     * Alternatively, the contents of this file may be used under the terms of
30     * the GNU General Public License ("GPL") version 2 or any later version,
31     * in which case the provisions of the GPL are applicable instead of
32     * the above. If you wish to allow the use of your version of this file
33     * only under the terms of the GPL and not to allow others to use your
34     * version of this file under the BSD license, indicate your decision
35     * by deleting the provisions above and replace them with the notice
36     * and other provisions required by the GPL. If you do not delete the
37     * provisions above, a recipient may use your version of this file under
38     * either the BSD or the GPL.
39 root 1.1 */
40    
41     #ifndef ECB_H
42     #define ECB_H
43    
44 root 1.87 /* 16 bits major, 16 bits minor */
45 root 1.141 #define ECB_VERSION 0x00010004
46 root 1.87
47 root 1.44 #ifdef _WIN32
48     typedef signed char int8_t;
49     typedef unsigned char uint8_t;
50     typedef signed short int16_t;
51     typedef unsigned short uint16_t;
52     typedef signed int int32_t;
53     typedef unsigned int uint32_t;
54     #if __GNUC__
55     typedef signed long long int64_t;
56     typedef unsigned long long uint64_t;
57 root 1.51 #else /* _MSC_VER || __BORLANDC__ */
58 root 1.44 typedef signed __int64 int64_t;
59     typedef unsigned __int64 uint64_t;
60     #endif
61 root 1.87 #ifdef _WIN64
62     #define ECB_PTRSIZE 8
63     typedef uint64_t uintptr_t;
64     typedef int64_t intptr_t;
65     #else
66     #define ECB_PTRSIZE 4
67     typedef uint32_t uintptr_t;
68     typedef int32_t intptr_t;
69     #endif
70 root 1.44 #else
71     #include <inttypes.h>
72 root 1.87 #if UINTMAX_MAX > 0xffffffffU
73     #define ECB_PTRSIZE 8
74     #else
75     #define ECB_PTRSIZE 4
76     #endif
77 root 1.44 #endif
78 root 1.6
79 root 1.114 /* work around x32 idiocy by defining proper macros */
80 root 1.125 #if __amd64 || __x86_64 || _M_AMD64 || _M_X64
81 root 1.119 #if _ILP32
82 root 1.115 #define ECB_AMD64_X32 1
83 root 1.114 #else
84 root 1.115 #define ECB_AMD64 1
85 root 1.114 #endif
86     #endif
87    
88 root 1.12 /* many compilers define _GNUC_ to some versions but then only implement
89     * what their idiot authors think are the "more important" extensions,
90 sf-exg 1.59 * causing enormous grief in return for some better fake benchmark numbers.
91 root 1.18 * or so.
92 root 1.12 * we try to detect these and simply assume they are not gcc - if they have
93     * an issue with that they should have done it right in the first place.
94     */
95 root 1.137 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
96     #define ECB_GCC_VERSION(major,minor) 0
97     #else
98     #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
99 root 1.12 #endif
100 root 1.1
101 sf-exg 1.138 #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
102    
103 root 1.147 #if __clang__ && defined __has_builtin
104     #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
105 sf-exg 1.138 #else
106     #define ECB_CLANG_BUILTIN(x) 0
107     #endif
108    
109 root 1.147 #if __clang__ && defined __has_extension
110     #define ECB_CLANG_EXTENSION(x) __has_extension (x)
111 sf-exg 1.140 #else
112     #define ECB_CLANG_EXTENSION(x) 0
113     #endif
114    
115 root 1.91 #define ECB_CPP (__cplusplus+0)
116     #define ECB_CPP11 (__cplusplus >= 201103L)
117 root 1.90
118 root 1.102 #if ECB_CPP
119 root 1.127 #define ECB_C 0
120     #define ECB_STDC_VERSION 0
121     #else
122     #define ECB_C 1
123     #define ECB_STDC_VERSION __STDC_VERSION__
124     #endif
125    
126     #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
127     #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
128    
129     #if ECB_CPP
130 root 1.102 #define ECB_EXTERN_C extern "C"
131     #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
132     #define ECB_EXTERN_C_END }
133     #else
134     #define ECB_EXTERN_C extern
135     #define ECB_EXTERN_C_BEG
136     #define ECB_EXTERN_C_END
137     #endif
138    
139 root 1.52 /*****************************************************************************/
140    
141 root 1.58 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
142     /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
143    
144 root 1.79 #if ECB_NO_THREADS
145 root 1.95 #define ECB_NO_SMP 1
146 root 1.79 #endif
147    
148 root 1.93 #if ECB_NO_SMP
149 root 1.64 #define ECB_MEMORY_FENCE do { } while (0)
150 root 1.58 #endif
151    
152 root 1.52 #ifndef ECB_MEMORY_FENCE
153 root 1.85 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
154 root 1.73 #if __i386 || __i386__
155 root 1.54 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
156 root 1.94 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
157     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
158 root 1.73 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
159 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
160     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
161     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
162 root 1.63 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
163 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
164 root 1.85 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
165     || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
166 root 1.84 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
167 root 1.85 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
168 root 1.94 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
169     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
170 root 1.129 #elif __aarch64__
171     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
172 root 1.124 #elif (__sparc || __sparc__) && !__sparcv8
173 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
174     #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
175     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
176 root 1.85 #elif defined __s390__ || defined __s390x__
177 root 1.77 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
178 root 1.85 #elif defined __mips__
179 root 1.118 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
180 root 1.116 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
181     #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
182 root 1.86 #elif defined __alpha__
183 root 1.94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
184     #elif defined __hppa__
185     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
186     #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
187     #elif defined __ia64__
188     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
189 root 1.117 #elif defined __m68k__
190     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
191     #elif defined __m88k__
192     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
193     #elif defined __sh__
194     #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
195 root 1.52 #endif
196     #endif
197     #endif
198    
199     #ifndef ECB_MEMORY_FENCE
200 root 1.93 #if ECB_GCC_VERSION(4,7)
201 root 1.97 /* see comment below (stdatomic.h) about the C11 memory model. */
202 root 1.93 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
203 root 1.128 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
204     #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
205 root 1.110
206 sf-exg 1.140 #elif ECB_CLANG_EXTENSION(c_atomic)
207     /* see comment below (stdatomic.h) about the C11 memory model. */
208     #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
209     #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
210     #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
211 root 1.110
212 root 1.93 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
213 root 1.52 #define ECB_MEMORY_FENCE __sync_synchronize ()
214 root 1.126 #elif _MSC_VER >= 1500 /* VC++ 2008 */
215     /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
216     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
217     #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
218     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
219     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
220 root 1.57 #elif _MSC_VER >= 1400 /* VC++ 2005 */
221     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
222     #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
223     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
224     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
225 root 1.85 #elif defined _WIN32
226 root 1.55 #include <WinNT.h>
227 root 1.57 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
228 root 1.72 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
229     #include <mbarrier.h>
230     #define ECB_MEMORY_FENCE __machine_rw_barrier ()
231     #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
232     #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
233 root 1.82 #elif __xlC__
234 root 1.83 #define ECB_MEMORY_FENCE __sync ()
235 root 1.52 #endif
236     #endif
237    
238 root 1.53 #ifndef ECB_MEMORY_FENCE
239 root 1.94 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
240     /* we assume that these memory fences work on all variables/all memory accesses, */
241     /* not just C11 atomics and atomic accesses */
242     #include <stdatomic.h>
243 root 1.97 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
244     /* any fence other than seq_cst, which isn't very efficient for us. */
245     /* Why that is, we don't know - either the C11 memory model is quite useless */
246     /* for most usages, or gcc and clang have a bug */
247     /* I *currently* lean towards the latter, and inefficiently implement */
248     /* all three of ecb's fences as a seq_cst fence */
249 root 1.128 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
250     /* for all __atomic_thread_fence's except seq_cst */
251 root 1.94 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
252     #endif
253     #endif
254    
255     #ifndef ECB_MEMORY_FENCE
256 root 1.62 #if !ECB_AVOID_PTHREADS
257     /*
258     * if you get undefined symbol references to pthread_mutex_lock,
259     * or failure to find pthread.h, then you should implement
260     * the ECB_MEMORY_FENCE operations for your cpu/compiler
261     * OR provide pthread.h and link against the posix thread library
262     * of your system.
263     */
264     #include <pthread.h>
265     #define ECB_NEEDS_PTHREADS 1
266     #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
267 root 1.52
268 root 1.62 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
269     #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
270     #endif
271     #endif
272    
273 root 1.85 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
274 root 1.52 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
275 root 1.62 #endif
276    
277 root 1.85 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
278 root 1.52 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
279     #endif
280    
281     /*****************************************************************************/
282    
283 root 1.149 #if ECB_CPP
284 root 1.46 #define ecb_inline static inline
285 root 1.38 #elif ECB_GCC_VERSION(2,5)
286 root 1.46 #define ecb_inline static __inline__
287 root 1.39 #elif ECB_C99
288 root 1.46 #define ecb_inline static inline
289 root 1.29 #else
290 root 1.46 #define ecb_inline static
291 root 1.38 #endif
292    
293     #if ECB_GCC_VERSION(3,3)
294     #define ecb_restrict __restrict__
295 root 1.39 #elif ECB_C99
296 root 1.38 #define ecb_restrict restrict
297     #else
298     #define ecb_restrict
299 root 1.4 #endif
300    
301 root 1.38 typedef int ecb_bool;
302    
303 root 1.8 #define ECB_CONCAT_(a, b) a ## b
304     #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
305     #define ECB_STRINGIFY_(a) # a
306     #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
307    
308 root 1.46 #define ecb_function_ ecb_inline
309 root 1.3
310 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
311 root 1.142 #define ecb_attribute(attrlist) __attribute__ (attrlist)
312 root 1.37 #else
313     #define ecb_attribute(attrlist)
314 sf-exg 1.138 #endif
315 root 1.127
316 sf-exg 1.138 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
317     #define ecb_is_constant(expr) __builtin_constant_p (expr)
318     #else
319 root 1.127 /* possible C11 impl for integral types
320     typedef struct ecb_is_constant_struct ecb_is_constant_struct;
321     #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
322    
323 root 1.37 #define ecb_is_constant(expr) 0
324 sf-exg 1.138 #endif
325    
326     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
327     #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
328     #else
329 root 1.37 #define ecb_expect(expr,value) (expr)
330 sf-exg 1.138 #endif
331    
332     #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
333     #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
334     #else
335 root 1.37 #define ecb_prefetch(addr,rw,locality)
336 root 1.1 #endif
337    
338 root 1.2 /* no emulation for ecb_decltype */
339 root 1.143 #if ECB_CPP11
340 root 1.144 // older implementations might have problems with decltype(x)::type, work around it
341 root 1.146 template<class T> struct ecb_decltype_t { typedef T type; };
342     #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
343 root 1.143 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
344     #define ecb_decltype(x) __typeof__ (x)
345 root 1.1 #endif
346    
347 root 1.135 #if _MSC_VER >= 1300
348 root 1.149 #define ecb_deprecated __declspec (deprecated)
349 root 1.135 #else
350     #define ecb_deprecated ecb_attribute ((__deprecated__))
351     #endif
352    
353 root 1.154 #if __MSC_VER >= 1500
354     #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
355     #elif ECB_GCC_VERSION(4,5)
356     #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
357     #else
358     #define ecb_deprecated_message(msg) ecb_deprecated
359     #endif
360    
361     #if _MSC_VER >= 1400
362     #define ecb_noinline __declspec (noinline)
363     #else
364     #define ecb_noinline ecb_attribute ((__noinline__))
365     #endif
366    
367 root 1.24 #define ecb_unused ecb_attribute ((__unused__))
368     #define ecb_const ecb_attribute ((__const__))
369     #define ecb_pure ecb_attribute ((__pure__))
370 root 1.35
371 root 1.145 /* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
372     #if ECB_C11 || __IBMC_NORETURN
373     /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */
374 root 1.90 #define ecb_noreturn _Noreturn
375 root 1.153 #elif ECB_CPP11
376     #define ecb_noreturn [[noreturn]]
377     #elif _MSC_VER >= 1200
378     #define ecb_noreturn __declspec (noreturn)
379 root 1.90 #else
380     #define ecb_noreturn ecb_attribute ((__noreturn__))
381     #endif
382    
383 root 1.35 #if ECB_GCC_VERSION(4,3)
384 root 1.39 #define ecb_artificial ecb_attribute ((__artificial__))
385     #define ecb_hot ecb_attribute ((__hot__))
386     #define ecb_cold ecb_attribute ((__cold__))
387 root 1.35 #else
388     #define ecb_artificial
389     #define ecb_hot
390     #define ecb_cold
391     #endif
392 root 1.1
393 root 1.39 /* put around conditional expressions if you are very sure that the */
394     /* expression is mostly true or mostly false. note that these return */
395     /* booleans, not the expression. */
396 root 1.33 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
397     #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
398 root 1.36 /* for compatibility to the rest of the world */
399 root 1.33 #define ecb_likely(expr) ecb_expect_true (expr)
400     #define ecb_unlikely(expr) ecb_expect_false (expr)
401 root 1.1
402 root 1.3 /* count trailing zero bits and count # of one bits */
403 root 1.139 #if ECB_GCC_VERSION(3,4) \
404     || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
405     && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
406     && ECB_CLANG_BUILTIN(__builtin_popcount))
407 root 1.49 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
408     #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
409     #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
410 root 1.35 #define ecb_ctz32(x) __builtin_ctz (x)
411 root 1.49 #define ecb_ctz64(x) __builtin_ctzll (x)
412 root 1.35 #define ecb_popcount32(x) __builtin_popcount (x)
413 root 1.49 /* no popcountll */
414 root 1.1 #else
415 root 1.151 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
416     ecb_function_ ecb_const int
417 root 1.35 ecb_ctz32 (uint32_t x)
418     {
419     int r = 0;
420    
421 root 1.48 x &= ~x + 1; /* this isolates the lowest bit */
422 root 1.35
423 root 1.50 #if ECB_branchless_on_i386
424     r += !!(x & 0xaaaaaaaa) << 0;
425     r += !!(x & 0xcccccccc) << 1;
426     r += !!(x & 0xf0f0f0f0) << 2;
427     r += !!(x & 0xff00ff00) << 3;
428     r += !!(x & 0xffff0000) << 4;
429     #else
430 root 1.35 if (x & 0xaaaaaaaa) r += 1;
431     if (x & 0xcccccccc) r += 2;
432     if (x & 0xf0f0f0f0) r += 4;
433     if (x & 0xff00ff00) r += 8;
434     if (x & 0xffff0000) r += 16;
435 root 1.50 #endif
436 root 1.35
437     return r;
438     }
439    
440 root 1.151 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
441     ecb_function_ ecb_const int
442 root 1.49 ecb_ctz64 (uint64_t x)
443     {
444     int shift = x & 0xffffffffU ? 0 : 32;
445 root 1.50 return ecb_ctz32 (x >> shift) + shift;
446 root 1.49 }
447    
448 root 1.151 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
449     ecb_function_ ecb_const int
450 root 1.35 ecb_popcount32 (uint32_t x)
451     {
452     x -= (x >> 1) & 0x55555555;
453     x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
454     x = ((x >> 4) + x) & 0x0f0f0f0f;
455     x *= 0x01010101;
456 root 1.1
457 root 1.35 return x >> 24;
458     }
459 root 1.49
460 root 1.151 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
461     ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
462 root 1.49 {
463 root 1.50 int r = 0;
464 root 1.49
465 root 1.50 if (x >> 16) { x >>= 16; r += 16; }
466     if (x >> 8) { x >>= 8; r += 8; }
467     if (x >> 4) { x >>= 4; r += 4; }
468     if (x >> 2) { x >>= 2; r += 2; }
469     if (x >> 1) { r += 1; }
470 root 1.49
471     return r;
472     }
473    
474 root 1.151 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
475     ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
476 root 1.49 {
477 root 1.50 int r = 0;
478 root 1.49
479 root 1.50 if (x >> 32) { x >>= 32; r += 32; }
480 root 1.49
481 root 1.50 return r + ecb_ld32 (x);
482 root 1.49 }
483 root 1.1 #endif
484    
485 root 1.151 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
486     ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
487     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
488     ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
489 root 1.88
490 root 1.151 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
491     ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
492 root 1.70 {
493     return ( (x * 0x0802U & 0x22110U)
494 root 1.151 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
495 root 1.70 }
496    
497 root 1.151 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
498     ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
499 root 1.70 {
500     x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
501     x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
502     x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
503     x = ( x >> 8 ) | ( x << 8);
504    
505     return x;
506     }
507    
508 root 1.151 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
509     ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
510 root 1.70 {
511     x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
512     x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
513     x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
514     x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
515     x = ( x >> 16 ) | ( x << 16);
516    
517     return x;
518     }
519    
520 root 1.49 /* popcount64 is only available on 64 bit cpus as gcc builtin */
521     /* so for this version we are lazy */
522 root 1.151 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
523     ecb_function_ ecb_const int
524 root 1.49 ecb_popcount64 (uint64_t x)
525     {
526     return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
527     }
528    
529 root 1.151 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
530     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
531     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
532     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
533     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
534     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
535     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
536     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
537    
538     ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
539     ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
540     ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
541     ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
542     ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
543     ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
544     ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
545     ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
546 root 1.50
547 sf-exg 1.138 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
548 root 1.49 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
549     #define ecb_bswap32(x) __builtin_bswap32 (x)
550     #define ecb_bswap64(x) __builtin_bswap64 (x)
551 root 1.13 #else
552 root 1.151 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
553     ecb_function_ ecb_const uint16_t
554 root 1.50 ecb_bswap16 (uint16_t x)
555 root 1.49 {
556 root 1.50 return ecb_rotl16 (x, 8);
557 root 1.49 }
558    
559 root 1.151 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
560     ecb_function_ ecb_const uint32_t
561 root 1.35 ecb_bswap32 (uint32_t x)
562     {
563 root 1.50 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
564 root 1.35 }
565    
566 root 1.151 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
567     ecb_function_ ecb_const uint64_t
568 root 1.49 ecb_bswap64 (uint64_t x)
569 root 1.35 {
570 root 1.50 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
571 root 1.35 }
572 root 1.13 #endif
573    
574 sf-exg 1.138 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
575 root 1.35 #define ecb_unreachable() __builtin_unreachable ()
576 root 1.13 #else
577 root 1.35 /* this seems to work fine, but gcc always emits a warning for it :/ */
578 root 1.151 ecb_inline ecb_noreturn void ecb_unreachable (void);
579     ecb_inline ecb_noreturn void ecb_unreachable (void) { }
580 root 1.13 #endif
581    
582 root 1.41 /* try to tell the compiler that some condition is definitely true */
583 root 1.100 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
584 root 1.41
585 root 1.151 ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
586     ecb_inline ecb_const unsigned char
587 root 1.23 ecb_byteorder_helper (void)
588 root 1.3 {
589 root 1.98 /* the union code still generates code under pressure in gcc, */
590 sf-exg 1.111 /* but less than using pointers, and always seems to */
591 root 1.98 /* successfully return a constant. */
592     /* the reason why we have this horrible preprocessor mess */
593 root 1.99 /* is to avoid it in all cases, at least on common architectures */
594 sf-exg 1.111 /* or when using a recent enough gcc version (>= 4.6) */
595 root 1.98 #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
596     return 0x44;
597     #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
598     return 0x44;
599     #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
600 root 1.113 return 0x11;
601 root 1.98 #else
602     union
603     {
604     uint32_t i;
605     uint8_t c;
606     } u = { 0x11223344 };
607     return u.c;
608     #endif
609 root 1.3 }
610    
611 root 1.151 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
612     ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
613     ecb_inline ecb_const ecb_bool ecb_little_endian (void);
614     ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
615 root 1.3
616 root 1.39 #if ECB_GCC_VERSION(3,0) || ECB_C99
617 root 1.35 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
618 root 1.31 #else
619 root 1.35 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
620 root 1.31 #endif
621 root 1.21
622 root 1.149 #if ECB_CPP
623 sf-exg 1.68 template<typename T>
624     static inline T ecb_div_rd (T val, T div)
625     {
626     return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
627     }
628     template<typename T>
629     static inline T ecb_div_ru (T val, T div)
630     {
631     return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
632     }
633     #else
634     #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
635     #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
636     #endif
637 sf-exg 1.67
638 root 1.5 #if ecb_cplusplus_does_not_suck
639 root 1.40 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
640 root 1.35 template<typename T, int N>
641     static inline int ecb_array_length (const T (&arr)[N])
642     {
643     return N;
644     }
645 root 1.5 #else
646 root 1.35 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
647 root 1.5 #endif
648    
649 root 1.104 /*******************************************************************************/
650     /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
651    
652     /* basically, everything uses "ieee pure-endian" floating point numbers */
653     /* the only noteworthy exception is ancient armle, which uses order 43218765 */
654     #if 0 \
655     || __i386 || __i386__ \
656     || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
657     || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
658     || defined __s390__ || defined __s390x__ \
659     || defined __mips__ \
660     || defined __alpha__ \
661     || defined __hppa__ \
662     || defined __ia64__ \
663 root 1.117 || defined __m68k__ \
664     || defined __m88k__ \
665     || defined __sh__ \
666 root 1.130 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
667 root 1.131 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
668 root 1.132 || defined __aarch64__
669 root 1.104 #define ECB_STDFP 1
670     #include <string.h> /* for memcpy */
671 root 1.102 #else
672 root 1.104 #define ECB_STDFP 0
673 root 1.102 #endif
674    
675 root 1.104 #ifndef ECB_NO_LIBM
676 root 1.103
677 root 1.121 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
678    
679 root 1.122 /* only the oldest of old doesn't have this one. solaris. */
680     #ifdef INFINITY
681     #define ECB_INFINITY INFINITY
682     #else
683     #define ECB_INFINITY HUGE_VAL
684     #endif
685    
686     #ifdef NAN
687 root 1.121 #define ECB_NAN NAN
688     #else
689 root 1.122 #define ECB_NAN ECB_INFINITY
690 root 1.121 #endif
691 root 1.120
692 root 1.148 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
693 root 1.150 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
694 root 1.148 #else
695 root 1.150 #define ecb_ldexpf(x,e) (float) ldexp ((x), (e))
696 root 1.148 #endif
697    
698 root 1.120 /* converts an ieee half/binary16 to a float */
699 root 1.151 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
700     ecb_function_ ecb_const float
701 root 1.120 ecb_binary16_to_float (uint16_t x)
702     {
703     int e = (x >> 10) & 0x1f;
704     int m = x & 0x3ff;
705     float r;
706    
707 root 1.148 if (!e ) r = ecb_ldexpf (m , -24);
708     else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
709 root 1.121 else if (m ) r = ECB_NAN;
710 root 1.123 else r = ECB_INFINITY;
711 root 1.120
712     return x & 0x8000 ? -r : r;
713     }
714    
715 root 1.104 /* convert a float to ieee single/binary32 */
716 root 1.151 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
717     ecb_function_ ecb_const uint32_t
718 root 1.103 ecb_float_to_binary32 (float x)
719     {
720     uint32_t r;
721    
722     #if ECB_STDFP
723 root 1.104 memcpy (&r, &x, 4);
724 root 1.103 #else
725 root 1.105 /* slow emulation, works for anything but -0 */
726 root 1.103 uint32_t m;
727     int e;
728    
729 root 1.108 if (x == 0e0f ) return 0x00000000U;
730 root 1.103 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
731     if (x < -3.40282346638528860e+38f) return 0xff800000U;
732 root 1.105 if (x != x ) return 0x7fbfffffU;
733 root 1.103
734     m = frexpf (x, &e) * 0x1000000U;
735    
736     r = m & 0x80000000U;
737    
738     if (r)
739     m = -m;
740    
741 root 1.108 if (e <= -126)
742 root 1.103 {
743     m &= 0xffffffU;
744     m >>= (-125 - e);
745     e = -126;
746     }
747    
748     r |= (e + 126) << 23;
749     r |= m & 0x7fffffU;
750     #endif
751    
752     return r;
753     }
754    
755 root 1.104 /* converts an ieee single/binary32 to a float */
756 root 1.151 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
757     ecb_function_ ecb_const float
758 root 1.103 ecb_binary32_to_float (uint32_t x)
759     {
760     float r;
761    
762     #if ECB_STDFP
763 root 1.104 memcpy (&r, &x, 4);
764 root 1.103 #else
765     /* emulation, only works for normals and subnormals and +0 */
766     int neg = x >> 31;
767     int e = (x >> 23) & 0xffU;
768    
769     x &= 0x7fffffU;
770    
771     if (e)
772     x |= 0x800000U;
773 root 1.104 else
774     e = 1;
775 root 1.103
776     /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
777 root 1.148 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
778 root 1.103
779     r = neg ? -r : r;
780     #endif
781    
782     return r;
783     }
784    
785 root 1.104 /* convert a double to ieee double/binary64 */
786 root 1.151 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
787     ecb_function_ ecb_const uint64_t
788 root 1.103 ecb_double_to_binary64 (double x)
789     {
790 root 1.104 uint64_t r;
791    
792     #if ECB_STDFP
793     memcpy (&r, &x, 8);
794     #else
795 root 1.105 /* slow emulation, works for anything but -0 */
796 root 1.104 uint64_t m;
797     int e;
798    
799 root 1.108 if (x == 0e0 ) return 0x0000000000000000U;
800 root 1.104 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
801     if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
802 root 1.105 if (x != x ) return 0X7ff7ffffffffffffU;
803 root 1.104
804     m = frexp (x, &e) * 0x20000000000000U;
805    
806     r = m & 0x8000000000000000;;
807    
808     if (r)
809     m = -m;
810    
811 root 1.108 if (e <= -1022)
812 root 1.104 {
813     m &= 0x1fffffffffffffU;
814     m >>= (-1021 - e);
815     e = -1022;
816     }
817    
818     r |= ((uint64_t)(e + 1022)) << 52;
819     r |= m & 0xfffffffffffffU;
820     #endif
821    
822     return r;
823     }
824    
825     /* converts an ieee double/binary64 to a double */
826 root 1.151 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
827     ecb_function_ ecb_const double
828 root 1.104 ecb_binary64_to_double (uint64_t x)
829     {
830     double r;
831    
832     #if ECB_STDFP
833     memcpy (&r, &x, 8);
834     #else
835     /* emulation, only works for normals and subnormals and +0 */
836     int neg = x >> 63;
837     int e = (x >> 52) & 0x7ffU;
838    
839     x &= 0xfffffffffffffU;
840    
841     if (e)
842     x |= 0x10000000000000U;
843     else
844     e = 1;
845    
846 root 1.107 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
847 root 1.108 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
848 root 1.104
849     r = neg ? -r : r;
850     #endif
851    
852     return r;
853 root 1.103 }
854    
855     #endif
856 root 1.102
857 root 1.1 #endif
858