1 | /* |
1 | /* |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> |
4 | * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de> |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
6 | * All rights reserved. |
6 | * All rights reserved. |
7 | * |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
9 | * tion, are permitted provided that the following conditions are met: |
9 | * tion, are permitted provided that the following conditions are met: |
… | |
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23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
26 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
27 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | * |
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29 | * Alternatively, the contents of this file may be used under the terms of |
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30 | * the GNU General Public License ("GPL") version 2 or any later version, |
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31 | * in which case the provisions of the GPL are applicable instead of |
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32 | * the above. If you wish to allow the use of your version of this file |
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33 | * only under the terms of the GPL and not to allow others to use your |
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34 | * version of this file under the BSD license, indicate your decision |
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35 | * by deleting the provisions above and replace them with the notice |
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36 | * and other provisions required by the GPL. If you do not delete the |
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37 | * provisions above, a recipient may use your version of this file under |
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38 | * either the BSD or the GPL. |
28 | */ |
39 | */ |
29 | |
40 | |
30 | #ifndef ECB_H |
41 | #ifndef ECB_H |
31 | #define ECB_H |
42 | #define ECB_H |
32 | |
43 | |
33 | /* 16 bits major, 16 bits minor */ |
44 | /* 16 bits major, 16 bits minor */ |
34 | #define ECB_VERSION 0x00010002 |
45 | #define ECB_VERSION 0x00010004 |
35 | |
46 | |
36 | #ifdef _WIN32 |
47 | #ifdef _WIN32 |
37 | typedef signed char int8_t; |
48 | typedef signed char int8_t; |
38 | typedef unsigned char uint8_t; |
49 | typedef unsigned char uint8_t; |
39 | typedef signed short int16_t; |
50 | typedef signed short int16_t; |
… | |
… | |
63 | #else |
74 | #else |
64 | #define ECB_PTRSIZE 4 |
75 | #define ECB_PTRSIZE 4 |
65 | #endif |
76 | #endif |
66 | #endif |
77 | #endif |
67 | |
78 | |
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79 | /* work around x32 idiocy by defining proper macros */ |
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80 | #if __amd64 || __x86_64 || _M_AMD64 || _M_X64 |
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81 | #if _ILP32 |
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82 | #define ECB_AMD64_X32 1 |
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83 | #else |
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84 | #define ECB_AMD64 1 |
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85 | #endif |
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86 | #endif |
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87 | |
68 | /* many compilers define _GNUC_ to some versions but then only implement |
88 | /* many compilers define _GNUC_ to some versions but then only implement |
69 | * what their idiot authors think are the "more important" extensions, |
89 | * what their idiot authors think are the "more important" extensions, |
70 | * causing enormous grief in return for some better fake benchmark numbers. |
90 | * causing enormous grief in return for some better fake benchmark numbers. |
71 | * or so. |
91 | * or so. |
72 | * we try to detect these and simply assume they are not gcc - if they have |
92 | * we try to detect these and simply assume they are not gcc - if they have |
73 | * an issue with that they should have done it right in the first place. |
93 | * an issue with that they should have done it right in the first place. |
74 | */ |
94 | */ |
75 | #ifndef ECB_GCC_VERSION |
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76 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
95 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
77 | #define ECB_GCC_VERSION(major,minor) 0 |
96 | #define ECB_GCC_VERSION(major,minor) 0 |
78 | #else |
97 | #else |
79 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
98 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
80 | #endif |
99 | #endif |
81 | #endif |
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82 | |
100 | |
83 | #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ |
101 | #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) |
84 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
102 | |
85 | #define ECB_C11 (__STDC_VERSION__ >= 201112L) |
103 | #if __clang__ && defined __has_builtin |
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104 | #define ECB_CLANG_BUILTIN(x) __has_builtin (x) |
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105 | #else |
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106 | #define ECB_CLANG_BUILTIN(x) 0 |
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107 | #endif |
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108 | |
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109 | #if __clang__ && defined __has_extension |
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110 | #define ECB_CLANG_EXTENSION(x) __has_extension (x) |
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111 | #else |
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112 | #define ECB_CLANG_EXTENSION(x) 0 |
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113 | #endif |
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114 | |
86 | #define ECB_CPP (__cplusplus+0) |
115 | #define ECB_CPP (__cplusplus+0) |
87 | #define ECB_CPP11 (__cplusplus >= 201103L) |
116 | #define ECB_CPP11 (__cplusplus >= 201103L) |
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117 | |
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118 | #if ECB_CPP |
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119 | #define ECB_C 0 |
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120 | #define ECB_STDC_VERSION 0 |
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121 | #else |
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122 | #define ECB_C 1 |
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123 | #define ECB_STDC_VERSION __STDC_VERSION__ |
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124 | #endif |
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125 | |
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126 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
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127 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
88 | |
128 | |
89 | #if ECB_CPP |
129 | #if ECB_CPP |
90 | #define ECB_EXTERN_C extern "C" |
130 | #define ECB_EXTERN_C extern "C" |
91 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
131 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
92 | #define ECB_EXTERN_C_END } |
132 | #define ECB_EXTERN_C_END } |
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125 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
165 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
126 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
166 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
127 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
167 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
128 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
168 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
129 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
169 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
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170 | #elif __aarch64__ |
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171 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
130 | #elif __sparc || __sparc__ |
172 | #elif (__sparc || __sparc__) && !__sparcv8 |
131 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
173 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
132 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
174 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
133 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
175 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
134 | #elif defined __s390__ || defined __s390x__ |
176 | #elif defined __s390__ || defined __s390x__ |
135 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
177 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
136 | #elif defined __mips__ |
178 | #elif defined __mips__ |
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179 | /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
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180 | /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ |
137 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
181 | #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
138 | #elif defined __alpha__ |
182 | #elif defined __alpha__ |
139 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
183 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
140 | #elif defined __hppa__ |
184 | #elif defined __hppa__ |
141 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
185 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
142 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
186 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
143 | #elif defined __ia64__ |
187 | #elif defined __ia64__ |
144 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
188 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
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189 | #elif defined __m68k__ |
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190 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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191 | #elif defined __m88k__ |
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192 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
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193 | #elif defined __sh__ |
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194 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
145 | #endif |
195 | #endif |
146 | #endif |
196 | #endif |
147 | #endif |
197 | #endif |
148 | |
198 | |
149 | #ifndef ECB_MEMORY_FENCE |
199 | #ifndef ECB_MEMORY_FENCE |
150 | #if ECB_GCC_VERSION(4,7) |
200 | #if ECB_GCC_VERSION(4,7) |
151 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
201 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
152 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
202 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
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203 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
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204 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
153 | |
205 | |
154 | /* The __has_feature syntax from clang is so misdesigned that we cannot use it |
206 | #elif ECB_CLANG_EXTENSION(c_atomic) |
155 | * without risking compile time errors with other compilers. We *could* |
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156 | * define our own ecb_clang_has_feature, but I just can't be bothered to work |
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157 | * around this shit time and again. |
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158 | * #elif defined __clang && __has_feature (cxx_atomic) |
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159 | * // see comment below (stdatomic.h) about the C11 memory model. |
207 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
160 | * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
208 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
161 | */ |
209 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
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210 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
162 | |
211 | |
163 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
212 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
164 | #define ECB_MEMORY_FENCE __sync_synchronize () |
213 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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214 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
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215 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
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216 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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217 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
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218 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
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219 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
165 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
220 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
166 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
221 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
167 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
222 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
168 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
223 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
169 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
224 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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189 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
244 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
190 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
245 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
191 | /* for most usages, or gcc and clang have a bug */ |
246 | /* for most usages, or gcc and clang have a bug */ |
192 | /* I *currently* lean towards the latter, and inefficiently implement */ |
247 | /* I *currently* lean towards the latter, and inefficiently implement */ |
193 | /* all three of ecb's fences as a seq_cst fence */ |
248 | /* all three of ecb's fences as a seq_cst fence */ |
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249 | /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
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250 | /* for all __atomic_thread_fence's except seq_cst */ |
194 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
251 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
195 | #endif |
252 | #endif |
196 | #endif |
253 | #endif |
197 | |
254 | |
198 | #ifndef ECB_MEMORY_FENCE |
255 | #ifndef ECB_MEMORY_FENCE |
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221 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
278 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
222 | #endif |
279 | #endif |
223 | |
280 | |
224 | /*****************************************************************************/ |
281 | /*****************************************************************************/ |
225 | |
282 | |
226 | #if __cplusplus |
283 | #if ECB_CPP |
227 | #define ecb_inline static inline |
284 | #define ecb_inline static inline |
228 | #elif ECB_GCC_VERSION(2,5) |
285 | #elif ECB_GCC_VERSION(2,5) |
229 | #define ecb_inline static __inline__ |
286 | #define ecb_inline static __inline__ |
230 | #elif ECB_C99 |
287 | #elif ECB_C99 |
231 | #define ecb_inline static inline |
288 | #define ecb_inline static inline |
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248 | #define ECB_STRINGIFY_(a) # a |
305 | #define ECB_STRINGIFY_(a) # a |
249 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
306 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
250 | |
307 | |
251 | #define ecb_function_ ecb_inline |
308 | #define ecb_function_ ecb_inline |
252 | |
309 | |
253 | #if ECB_GCC_VERSION(3,1) |
310 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
254 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
311 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
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312 | #else |
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313 | #define ecb_attribute(attrlist) |
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314 | #endif |
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315 | |
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316 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) |
255 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
317 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
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318 | #else |
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319 | /* possible C11 impl for integral types |
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320 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
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321 | #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ |
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322 | |
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323 | #define ecb_is_constant(expr) 0 |
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324 | #endif |
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325 | |
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326 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) |
256 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
327 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
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328 | #else |
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329 | #define ecb_expect(expr,value) (expr) |
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330 | #endif |
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331 | |
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332 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) |
257 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
333 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
258 | #else |
334 | #else |
259 | #define ecb_attribute(attrlist) |
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260 | #define ecb_is_constant(expr) 0 |
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261 | #define ecb_expect(expr,value) (expr) |
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262 | #define ecb_prefetch(addr,rw,locality) |
335 | #define ecb_prefetch(addr,rw,locality) |
263 | #endif |
336 | #endif |
264 | |
337 | |
265 | /* no emulation for ecb_decltype */ |
338 | /* no emulation for ecb_decltype */ |
266 | #if ECB_GCC_VERSION(4,5) |
339 | #if ECB_CPP11 |
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340 | // older implementations might have problems with decltype(x)::type, work around it |
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341 | template<class T> struct ecb_decltype_t { typedef T type; }; |
267 | #define ecb_decltype(x) __decltype(x) |
342 | #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type |
268 | #elif ECB_GCC_VERSION(3,0) |
343 | #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) |
269 | #define ecb_decltype(x) __typeof(x) |
344 | #define ecb_decltype(x) __typeof__ (x) |
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345 | #endif |
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346 | |
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347 | #if _MSC_VER >= 1300 |
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348 | #define ecb_deprecated __declspec (deprecated) |
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349 | #else |
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350 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
270 | #endif |
351 | #endif |
271 | |
352 | |
272 | #define ecb_noinline ecb_attribute ((__noinline__)) |
353 | #define ecb_noinline ecb_attribute ((__noinline__)) |
273 | #define ecb_unused ecb_attribute ((__unused__)) |
354 | #define ecb_unused ecb_attribute ((__unused__)) |
274 | #define ecb_const ecb_attribute ((__const__)) |
355 | #define ecb_const ecb_attribute ((__const__)) |
275 | #define ecb_pure ecb_attribute ((__pure__)) |
356 | #define ecb_pure ecb_attribute ((__pure__)) |
276 | |
357 | |
277 | #if ECB_C11 |
358 | /* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ |
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359 | #if ECB_C11 || __IBMC_NORETURN |
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360 | /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */ |
278 | #define ecb_noreturn _Noreturn |
361 | #define ecb_noreturn _Noreturn |
279 | #else |
362 | #else |
280 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
363 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
281 | #endif |
364 | #endif |
282 | |
365 | |
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298 | /* for compatibility to the rest of the world */ |
381 | /* for compatibility to the rest of the world */ |
299 | #define ecb_likely(expr) ecb_expect_true (expr) |
382 | #define ecb_likely(expr) ecb_expect_true (expr) |
300 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
383 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
301 | |
384 | |
302 | /* count trailing zero bits and count # of one bits */ |
385 | /* count trailing zero bits and count # of one bits */ |
303 | #if ECB_GCC_VERSION(3,4) |
386 | #if ECB_GCC_VERSION(3,4) \ |
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387 | || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ |
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388 | && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ |
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389 | && ECB_CLANG_BUILTIN(__builtin_popcount)) |
304 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
390 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
305 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
391 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
306 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
392 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
307 | #define ecb_ctz32(x) __builtin_ctz (x) |
393 | #define ecb_ctz32(x) __builtin_ctz (x) |
308 | #define ecb_ctz64(x) __builtin_ctzll (x) |
394 | #define ecb_ctz64(x) __builtin_ctzll (x) |
309 | #define ecb_popcount32(x) __builtin_popcount (x) |
395 | #define ecb_popcount32(x) __builtin_popcount (x) |
310 | /* no popcountll */ |
396 | /* no popcountll */ |
311 | #else |
397 | #else |
312 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
398 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
313 | ecb_function_ int |
399 | ecb_function_ ecb_const int |
314 | ecb_ctz32 (uint32_t x) |
400 | ecb_ctz32 (uint32_t x) |
315 | { |
401 | { |
316 | int r = 0; |
402 | int r = 0; |
317 | |
403 | |
318 | x &= ~x + 1; /* this isolates the lowest bit */ |
404 | x &= ~x + 1; /* this isolates the lowest bit */ |
… | |
… | |
332 | #endif |
418 | #endif |
333 | |
419 | |
334 | return r; |
420 | return r; |
335 | } |
421 | } |
336 | |
422 | |
337 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
423 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
338 | ecb_function_ int |
424 | ecb_function_ ecb_const int |
339 | ecb_ctz64 (uint64_t x) |
425 | ecb_ctz64 (uint64_t x) |
340 | { |
426 | { |
341 | int shift = x & 0xffffffffU ? 0 : 32; |
427 | int shift = x & 0xffffffffU ? 0 : 32; |
342 | return ecb_ctz32 (x >> shift) + shift; |
428 | return ecb_ctz32 (x >> shift) + shift; |
343 | } |
429 | } |
344 | |
430 | |
345 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
431 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
346 | ecb_function_ int |
432 | ecb_function_ ecb_const int |
347 | ecb_popcount32 (uint32_t x) |
433 | ecb_popcount32 (uint32_t x) |
348 | { |
434 | { |
349 | x -= (x >> 1) & 0x55555555; |
435 | x -= (x >> 1) & 0x55555555; |
350 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
436 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
351 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
437 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
352 | x *= 0x01010101; |
438 | x *= 0x01010101; |
353 | |
439 | |
354 | return x >> 24; |
440 | return x >> 24; |
355 | } |
441 | } |
356 | |
442 | |
357 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
443 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
358 | ecb_function_ int ecb_ld32 (uint32_t x) |
444 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
359 | { |
445 | { |
360 | int r = 0; |
446 | int r = 0; |
361 | |
447 | |
362 | if (x >> 16) { x >>= 16; r += 16; } |
448 | if (x >> 16) { x >>= 16; r += 16; } |
363 | if (x >> 8) { x >>= 8; r += 8; } |
449 | if (x >> 8) { x >>= 8; r += 8; } |
… | |
… | |
366 | if (x >> 1) { r += 1; } |
452 | if (x >> 1) { r += 1; } |
367 | |
453 | |
368 | return r; |
454 | return r; |
369 | } |
455 | } |
370 | |
456 | |
371 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
457 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
372 | ecb_function_ int ecb_ld64 (uint64_t x) |
458 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
373 | { |
459 | { |
374 | int r = 0; |
460 | int r = 0; |
375 | |
461 | |
376 | if (x >> 32) { x >>= 32; r += 32; } |
462 | if (x >> 32) { x >>= 32; r += 32; } |
377 | |
463 | |
378 | return r + ecb_ld32 (x); |
464 | return r + ecb_ld32 (x); |
379 | } |
465 | } |
380 | #endif |
466 | #endif |
381 | |
467 | |
382 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; |
468 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
383 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
469 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
384 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; |
470 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
385 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
471 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
386 | |
472 | |
387 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
473 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
388 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
474 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
389 | { |
475 | { |
390 | return ( (x * 0x0802U & 0x22110U) |
476 | return ( (x * 0x0802U & 0x22110U) |
391 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
477 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
392 | } |
478 | } |
393 | |
479 | |
394 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; |
480 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
395 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
481 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
396 | { |
482 | { |
397 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
483 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
398 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
484 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
399 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
485 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
400 | x = ( x >> 8 ) | ( x << 8); |
486 | x = ( x >> 8 ) | ( x << 8); |
401 | |
487 | |
402 | return x; |
488 | return x; |
403 | } |
489 | } |
404 | |
490 | |
405 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; |
491 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
406 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
492 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
407 | { |
493 | { |
408 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
494 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
409 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
495 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
410 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
496 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
411 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
497 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
… | |
… | |
414 | return x; |
500 | return x; |
415 | } |
501 | } |
416 | |
502 | |
417 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
503 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
418 | /* so for this version we are lazy */ |
504 | /* so for this version we are lazy */ |
419 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
505 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
420 | ecb_function_ int |
506 | ecb_function_ ecb_const int |
421 | ecb_popcount64 (uint64_t x) |
507 | ecb_popcount64 (uint64_t x) |
422 | { |
508 | { |
423 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
509 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
424 | } |
510 | } |
425 | |
511 | |
426 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
512 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
427 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
513 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
428 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
514 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
429 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
515 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
430 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
516 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
431 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
517 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
432 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
518 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
433 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
519 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
434 | |
520 | |
435 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
521 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
436 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
522 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
437 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
523 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
438 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
524 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
439 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
525 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
440 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
526 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
441 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
527 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
442 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
528 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
443 | |
529 | |
444 | #if ECB_GCC_VERSION(4,3) |
530 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
445 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
531 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
446 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
532 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
447 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
533 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
448 | #else |
534 | #else |
449 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
535 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
450 | ecb_function_ uint16_t |
536 | ecb_function_ ecb_const uint16_t |
451 | ecb_bswap16 (uint16_t x) |
537 | ecb_bswap16 (uint16_t x) |
452 | { |
538 | { |
453 | return ecb_rotl16 (x, 8); |
539 | return ecb_rotl16 (x, 8); |
454 | } |
540 | } |
455 | |
541 | |
456 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
542 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
457 | ecb_function_ uint32_t |
543 | ecb_function_ ecb_const uint32_t |
458 | ecb_bswap32 (uint32_t x) |
544 | ecb_bswap32 (uint32_t x) |
459 | { |
545 | { |
460 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
546 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
461 | } |
547 | } |
462 | |
548 | |
463 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
549 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
464 | ecb_function_ uint64_t |
550 | ecb_function_ ecb_const uint64_t |
465 | ecb_bswap64 (uint64_t x) |
551 | ecb_bswap64 (uint64_t x) |
466 | { |
552 | { |
467 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
553 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
468 | } |
554 | } |
469 | #endif |
555 | #endif |
470 | |
556 | |
471 | #if ECB_GCC_VERSION(4,5) |
557 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
472 | #define ecb_unreachable() __builtin_unreachable () |
558 | #define ecb_unreachable() __builtin_unreachable () |
473 | #else |
559 | #else |
474 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
560 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
475 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
561 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
476 | ecb_inline void ecb_unreachable (void) { } |
562 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
477 | #endif |
563 | #endif |
478 | |
564 | |
479 | /* try to tell the compiler that some condition is definitely true */ |
565 | /* try to tell the compiler that some condition is definitely true */ |
480 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
566 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
481 | |
567 | |
482 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
568 | ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); |
483 | ecb_inline unsigned char |
569 | ecb_inline ecb_const unsigned char |
484 | ecb_byteorder_helper (void) |
570 | ecb_byteorder_helper (void) |
485 | { |
571 | { |
486 | /* the union code still generates code under pressure in gcc, */ |
572 | /* the union code still generates code under pressure in gcc, */ |
487 | /* but less than using pointers, and always seems to */ |
573 | /* but less than using pointers, and always seems to */ |
488 | /* successfully return a constant. */ |
574 | /* successfully return a constant. */ |
… | |
… | |
503 | } u = { 0x11223344 }; |
589 | } u = { 0x11223344 }; |
504 | return u.c; |
590 | return u.c; |
505 | #endif |
591 | #endif |
506 | } |
592 | } |
507 | |
593 | |
508 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
594 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
509 | ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
595 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
510 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
596 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
511 | ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
597 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
512 | |
598 | |
513 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
599 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
514 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
600 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
515 | #else |
601 | #else |
516 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
602 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
517 | #endif |
603 | #endif |
518 | |
604 | |
519 | #if __cplusplus |
605 | #if ECB_CPP |
520 | template<typename T> |
606 | template<typename T> |
521 | static inline T ecb_div_rd (T val, T div) |
607 | static inline T ecb_div_rd (T val, T div) |
522 | { |
608 | { |
523 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
609 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
524 | } |
610 | } |
… | |
… | |
550 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
636 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
551 | #if 0 \ |
637 | #if 0 \ |
552 | || __i386 || __i386__ \ |
638 | || __i386 || __i386__ \ |
553 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
639 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
554 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
640 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
555 | || defined __arm__ && defined __ARM_EABI__ \ |
|
|
556 | || defined __s390__ || defined __s390x__ \ |
641 | || defined __s390__ || defined __s390x__ \ |
557 | || defined __mips__ \ |
642 | || defined __mips__ \ |
558 | || defined __alpha__ \ |
643 | || defined __alpha__ \ |
559 | || defined __hppa__ \ |
644 | || defined __hppa__ \ |
560 | || defined __ia64__ \ |
645 | || defined __ia64__ \ |
|
|
646 | || defined __m68k__ \ |
|
|
647 | || defined __m88k__ \ |
|
|
648 | || defined __sh__ \ |
561 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 |
649 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ |
|
|
650 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
|
|
651 | || defined __aarch64__ |
562 | #define ECB_STDFP 1 |
652 | #define ECB_STDFP 1 |
563 | #include <string.h> /* for memcpy */ |
653 | #include <string.h> /* for memcpy */ |
564 | #else |
654 | #else |
565 | #define ECB_STDFP 0 |
655 | #define ECB_STDFP 0 |
566 | #include <math.h> /* for frexp*, ldexp* */ |
|
|
567 | #endif |
656 | #endif |
568 | |
657 | |
569 | #ifndef ECB_NO_LIBM |
658 | #ifndef ECB_NO_LIBM |
570 | |
659 | |
|
|
660 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
|
|
661 | |
|
|
662 | /* only the oldest of old doesn't have this one. solaris. */ |
|
|
663 | #ifdef INFINITY |
|
|
664 | #define ECB_INFINITY INFINITY |
|
|
665 | #else |
|
|
666 | #define ECB_INFINITY HUGE_VAL |
|
|
667 | #endif |
|
|
668 | |
|
|
669 | #ifdef NAN |
|
|
670 | #define ECB_NAN NAN |
|
|
671 | #else |
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|
672 | #define ECB_NAN ECB_INFINITY |
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673 | #endif |
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674 | |
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675 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
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676 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
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677 | #else |
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678 | #define ecb_ldexpf(x,e) (float) ldexp ((x), (e)) |
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679 | #endif |
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680 | |
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681 | /* converts an ieee half/binary16 to a float */ |
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682 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
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683 | ecb_function_ ecb_const float |
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684 | ecb_binary16_to_float (uint16_t x) |
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685 | { |
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686 | int e = (x >> 10) & 0x1f; |
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687 | int m = x & 0x3ff; |
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688 | float r; |
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689 | |
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690 | if (!e ) r = ecb_ldexpf (m , -24); |
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691 | else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); |
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692 | else if (m ) r = ECB_NAN; |
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693 | else r = ECB_INFINITY; |
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694 | |
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695 | return x & 0x8000 ? -r : r; |
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696 | } |
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697 | |
571 | /* convert a float to ieee single/binary32 */ |
698 | /* convert a float to ieee single/binary32 */ |
572 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
699 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
573 | ecb_function_ uint32_t |
700 | ecb_function_ ecb_const uint32_t |
574 | ecb_float_to_binary32 (float x) |
701 | ecb_float_to_binary32 (float x) |
575 | { |
702 | { |
576 | uint32_t r; |
703 | uint32_t r; |
577 | |
704 | |
578 | #if ECB_STDFP |
705 | #if ECB_STDFP |
… | |
… | |
607 | |
734 | |
608 | return r; |
735 | return r; |
609 | } |
736 | } |
610 | |
737 | |
611 | /* converts an ieee single/binary32 to a float */ |
738 | /* converts an ieee single/binary32 to a float */ |
612 | ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; |
739 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
613 | ecb_function_ float |
740 | ecb_function_ ecb_const float |
614 | ecb_binary32_to_float (uint32_t x) |
741 | ecb_binary32_to_float (uint32_t x) |
615 | { |
742 | { |
616 | float r; |
743 | float r; |
617 | |
744 | |
618 | #if ECB_STDFP |
745 | #if ECB_STDFP |
… | |
… | |
628 | x |= 0x800000U; |
755 | x |= 0x800000U; |
629 | else |
756 | else |
630 | e = 1; |
757 | e = 1; |
631 | |
758 | |
632 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
759 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
633 | r = ldexpf (x * (0.5f / 0x800000U), e - 126); |
760 | r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); |
634 | |
761 | |
635 | r = neg ? -r : r; |
762 | r = neg ? -r : r; |
636 | #endif |
763 | #endif |
637 | |
764 | |
638 | return r; |
765 | return r; |
639 | } |
766 | } |
640 | |
767 | |
641 | /* convert a double to ieee double/binary64 */ |
768 | /* convert a double to ieee double/binary64 */ |
642 | ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; |
769 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
643 | ecb_function_ uint64_t |
770 | ecb_function_ ecb_const uint64_t |
644 | ecb_double_to_binary64 (double x) |
771 | ecb_double_to_binary64 (double x) |
645 | { |
772 | { |
646 | uint64_t r; |
773 | uint64_t r; |
647 | |
774 | |
648 | #if ECB_STDFP |
775 | #if ECB_STDFP |
… | |
… | |
677 | |
804 | |
678 | return r; |
805 | return r; |
679 | } |
806 | } |
680 | |
807 | |
681 | /* converts an ieee double/binary64 to a double */ |
808 | /* converts an ieee double/binary64 to a double */ |
682 | ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; |
809 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
683 | ecb_function_ double |
810 | ecb_function_ ecb_const double |
684 | ecb_binary64_to_double (uint64_t x) |
811 | ecb_binary64_to_double (uint64_t x) |
685 | { |
812 | { |
686 | double r; |
813 | double r; |
687 | |
814 | |
688 | #if ECB_STDFP |
815 | #if ECB_STDFP |