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 (©) 2009-2014 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 0x00010003 |
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 |
… | |
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78 | #else |
98 | #else |
79 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
99 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
80 | #endif |
100 | #endif |
81 | #endif |
101 | #endif |
82 | |
102 | |
83 | #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ |
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84 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
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85 | #define ECB_C11 (__STDC_VERSION__ >= 201112L) |
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86 | #define ECB_CPP (__cplusplus+0) |
103 | #define ECB_CPP (__cplusplus+0) |
87 | #define ECB_CPP11 (__cplusplus >= 201103L) |
104 | #define ECB_CPP11 (__cplusplus >= 201103L) |
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105 | |
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106 | #if ECB_CPP |
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107 | #define ECB_C 0 |
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108 | #define ECB_STDC_VERSION 0 |
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109 | #else |
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110 | #define ECB_C 1 |
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111 | #define ECB_STDC_VERSION __STDC_VERSION__ |
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112 | #endif |
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113 | |
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114 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
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115 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
88 | |
116 | |
89 | #if ECB_CPP |
117 | #if ECB_CPP |
90 | #define ECB_EXTERN_C extern "C" |
118 | #define ECB_EXTERN_C extern "C" |
91 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
119 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
92 | #define ECB_EXTERN_C_END } |
120 | #define ECB_EXTERN_C_END } |
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125 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
153 | || 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") |
154 | #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__ \ |
155 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
128 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
156 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
129 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
157 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
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158 | #elif __aarch64__ |
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159 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
130 | #elif __sparc || __sparc__ |
160 | #elif (__sparc || __sparc__) && !__sparcv8 |
131 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
161 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
132 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
162 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
133 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
163 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
134 | #elif defined __s390__ || defined __s390x__ |
164 | #elif defined __s390__ || defined __s390x__ |
135 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
165 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
136 | #elif defined __mips__ |
166 | #elif defined __mips__ |
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167 | /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
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168 | /* 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") |
169 | #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
138 | #elif defined __alpha__ |
170 | #elif defined __alpha__ |
139 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
171 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
140 | #elif defined __hppa__ |
172 | #elif defined __hppa__ |
141 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
173 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
142 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
174 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
143 | #elif defined __ia64__ |
175 | #elif defined __ia64__ |
144 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
176 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
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177 | #elif defined __m68k__ |
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178 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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179 | #elif defined __m88k__ |
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180 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
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181 | #elif defined __sh__ |
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182 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
145 | #endif |
183 | #endif |
146 | #endif |
184 | #endif |
147 | #endif |
185 | #endif |
148 | |
186 | |
149 | #ifndef ECB_MEMORY_FENCE |
187 | #ifndef ECB_MEMORY_FENCE |
150 | #if ECB_GCC_VERSION(4,7) |
188 | #if ECB_GCC_VERSION(4,7) |
151 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
189 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
152 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
190 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
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191 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
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192 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
153 | |
193 | |
154 | /* The __has_feature syntax from clang is so misdesigned that we cannot use it |
194 | /* The __has_feature syntax from clang is so misdesigned that we cannot use it |
155 | * without risking compile time errors with other compilers. We *could* |
195 | * without risking compile time errors with other compilers. We *could* |
156 | * define our own ecb_clang_has_feature, but I just can't be bothered to work |
196 | * define our own ecb_clang_has_feature, but I just can't be bothered to work |
157 | * around this shit time and again. |
197 | * around this shit time and again. |
158 | * #elif defined __clang && __has_feature (cxx_atomic) |
198 | * #elif defined __clang && __has_feature (cxx_atomic) |
159 | * // see comment below (stdatomic.h) about the C11 memory model. |
199 | * // see comment below (stdatomic.h) about the C11 memory model. |
160 | * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
200 | * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
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201 | * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
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202 | * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
161 | */ |
203 | */ |
162 | |
204 | |
163 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
205 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
164 | #define ECB_MEMORY_FENCE __sync_synchronize () |
206 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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207 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
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208 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
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209 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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210 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
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211 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
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212 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
165 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
213 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
166 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
214 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
167 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
215 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
168 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
216 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
169 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
217 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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189 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
237 | /* 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 */ |
238 | /* 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 */ |
239 | /* for most usages, or gcc and clang have a bug */ |
192 | /* I *currently* lean towards the latter, and inefficiently implement */ |
240 | /* I *currently* lean towards the latter, and inefficiently implement */ |
193 | /* all three of ecb's fences as a seq_cst fence */ |
241 | /* all three of ecb's fences as a seq_cst fence */ |
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242 | /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
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243 | /* for all __atomic_thread_fence's except seq_cst */ |
194 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
244 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
195 | #endif |
245 | #endif |
196 | #endif |
246 | #endif |
197 | |
247 | |
198 | #ifndef ECB_MEMORY_FENCE |
248 | #ifndef ECB_MEMORY_FENCE |
… | |
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255 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
305 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
256 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
306 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
257 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
307 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
258 | #else |
308 | #else |
259 | #define ecb_attribute(attrlist) |
309 | #define ecb_attribute(attrlist) |
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310 | |
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311 | /* possible C11 impl for integral types |
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312 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
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313 | #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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314 | |
260 | #define ecb_is_constant(expr) 0 |
315 | #define ecb_is_constant(expr) 0 |
261 | #define ecb_expect(expr,value) (expr) |
316 | #define ecb_expect(expr,value) (expr) |
262 | #define ecb_prefetch(addr,rw,locality) |
317 | #define ecb_prefetch(addr,rw,locality) |
263 | #endif |
318 | #endif |
264 | |
319 | |
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267 | #define ecb_decltype(x) __decltype(x) |
322 | #define ecb_decltype(x) __decltype(x) |
268 | #elif ECB_GCC_VERSION(3,0) |
323 | #elif ECB_GCC_VERSION(3,0) |
269 | #define ecb_decltype(x) __typeof(x) |
324 | #define ecb_decltype(x) __typeof(x) |
270 | #endif |
325 | #endif |
271 | |
326 | |
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327 | #if _MSC_VER >= 1300 |
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328 | #define ecb_deprecated __declspec(deprecated) |
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329 | #else |
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330 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
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331 | #endif |
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332 | |
272 | #define ecb_noinline ecb_attribute ((__noinline__)) |
333 | #define ecb_noinline ecb_attribute ((__noinline__)) |
273 | #define ecb_unused ecb_attribute ((__unused__)) |
334 | #define ecb_unused ecb_attribute ((__unused__)) |
274 | #define ecb_const ecb_attribute ((__const__)) |
335 | #define ecb_const ecb_attribute ((__const__)) |
275 | #define ecb_pure ecb_attribute ((__pure__)) |
336 | #define ecb_pure ecb_attribute ((__pure__)) |
276 | |
337 | |
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338 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ |
277 | #if ECB_C11 |
339 | #if ECB_C11 |
278 | #define ecb_noreturn _Noreturn |
340 | #define ecb_noreturn _Noreturn |
279 | #else |
341 | #else |
280 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
342 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
281 | #endif |
343 | #endif |
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550 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
612 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
551 | #if 0 \ |
613 | #if 0 \ |
552 | || __i386 || __i386__ \ |
614 | || __i386 || __i386__ \ |
553 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
615 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
554 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
616 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
555 | || defined __arm__ && defined __ARM_EABI__ \ |
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556 | || defined __s390__ || defined __s390x__ \ |
617 | || defined __s390__ || defined __s390x__ \ |
557 | || defined __mips__ \ |
618 | || defined __mips__ \ |
558 | || defined __alpha__ \ |
619 | || defined __alpha__ \ |
559 | || defined __hppa__ \ |
620 | || defined __hppa__ \ |
560 | || defined __ia64__ \ |
621 | || defined __ia64__ \ |
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622 | || defined __m68k__ \ |
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623 | || defined __m88k__ \ |
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624 | || defined __sh__ \ |
561 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 |
625 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ |
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626 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
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627 | || defined __aarch64__ |
562 | #define ECB_STDFP 1 |
628 | #define ECB_STDFP 1 |
563 | #include <string.h> /* for memcpy */ |
629 | #include <string.h> /* for memcpy */ |
564 | #else |
630 | #else |
565 | #define ECB_STDFP 0 |
631 | #define ECB_STDFP 0 |
566 | #include <math.h> /* for frexp*, ldexp* */ |
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567 | #endif |
632 | #endif |
568 | |
633 | |
569 | #ifndef ECB_NO_LIBM |
634 | #ifndef ECB_NO_LIBM |
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635 | |
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636 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
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637 | |
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638 | /* only the oldest of old doesn't have this one. solaris. */ |
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639 | #ifdef INFINITY |
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640 | #define ECB_INFINITY INFINITY |
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641 | #else |
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642 | #define ECB_INFINITY HUGE_VAL |
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643 | #endif |
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644 | |
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645 | #ifdef NAN |
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646 | #define ECB_NAN NAN |
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647 | #else |
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648 | #define ECB_NAN ECB_INFINITY |
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649 | #endif |
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650 | |
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651 | /* converts an ieee half/binary16 to a float */ |
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652 | ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
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653 | ecb_function_ float |
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654 | ecb_binary16_to_float (uint16_t x) |
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655 | { |
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656 | int e = (x >> 10) & 0x1f; |
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657 | int m = x & 0x3ff; |
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658 | float r; |
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659 | |
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660 | if (!e ) r = ldexpf (m , -24); |
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661 | else if (e != 31) r = ldexpf (m + 0x400, e - 25); |
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662 | else if (m ) r = ECB_NAN; |
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663 | else r = ECB_INFINITY; |
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664 | |
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665 | return x & 0x8000 ? -r : r; |
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666 | } |
570 | |
667 | |
571 | /* convert a float to ieee single/binary32 */ |
668 | /* convert a float to ieee single/binary32 */ |
572 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
669 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
573 | ecb_function_ uint32_t |
670 | ecb_function_ uint32_t |
574 | ecb_float_to_binary32 (float x) |
671 | ecb_float_to_binary32 (float x) |