1 | /* |
1 | /* |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2011 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: |
… | |
… | |
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 | |
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44 | /* 16 bits major, 16 bits minor */ |
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45 | #define ECB_VERSION 0x00010004 |
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46 | |
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47 | #ifdef _WIN32 |
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48 | typedef signed char int8_t; |
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49 | typedef unsigned char uint8_t; |
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50 | typedef signed short int16_t; |
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51 | typedef unsigned short uint16_t; |
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52 | typedef signed int int32_t; |
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53 | typedef unsigned int uint32_t; |
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54 | #if __GNUC__ |
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55 | typedef signed long long int64_t; |
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56 | typedef unsigned long long uint64_t; |
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57 | #else /* _MSC_VER || __BORLANDC__ */ |
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58 | typedef signed __int64 int64_t; |
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59 | typedef unsigned __int64 uint64_t; |
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60 | #endif |
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61 | #ifdef _WIN64 |
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62 | #define ECB_PTRSIZE 8 |
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63 | typedef uint64_t uintptr_t; |
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64 | typedef int64_t intptr_t; |
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65 | #else |
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66 | #define ECB_PTRSIZE 4 |
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67 | typedef uint32_t uintptr_t; |
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68 | typedef int32_t intptr_t; |
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69 | #endif |
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70 | #else |
33 | #include <inttypes.h> |
71 | #include <inttypes.h> |
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72 | #if UINTMAX_MAX > 0xffffffffU |
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73 | #define ECB_PTRSIZE 8 |
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74 | #else |
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75 | #define ECB_PTRSIZE 4 |
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76 | #endif |
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77 | #endif |
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78 | |
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79 | #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) |
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80 | #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) |
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81 | |
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82 | /* work around x32 idiocy by defining proper macros */ |
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83 | #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
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84 | #if _ILP32 |
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85 | #define ECB_AMD64_X32 1 |
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86 | #else |
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87 | #define ECB_AMD64 1 |
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88 | #endif |
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89 | #endif |
34 | |
90 | |
35 | /* many compilers define _GNUC_ to some versions but then only implement |
91 | /* many compilers define _GNUC_ to some versions but then only implement |
36 | * what their idiot authors think are the "more important" extensions, |
92 | * what their idiot authors think are the "more important" extensions, |
37 | * causing enourmous grief in return for some better fake benchmark numbers. |
93 | * causing enormous grief in return for some better fake benchmark numbers. |
38 | * or so. |
94 | * or so. |
39 | * we try to detect these and simply assume they are not gcc - if they have |
95 | * we try to detect these and simply assume they are not gcc - if they have |
40 | * an issue with that they should have done it right in the first place. |
96 | * an issue with that they should have done it right in the first place. |
41 | */ |
97 | */ |
42 | #ifndef ECB_GCC_VERSION |
98 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
43 | # if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
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44 | # define ECB_GCC_VERSION(major,minor) 0 |
99 | #define ECB_GCC_VERSION(major,minor) 0 |
45 | # else |
100 | #else |
46 | # define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
101 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
47 | # endif |
102 | #endif |
48 | #endif |
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49 | |
103 | |
50 | #ifndef __cplusplus |
104 | #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) |
51 | # if __STDC_VERSION__ >= 199901L |
105 | |
52 | # define ECB_INLINE static inline |
106 | #if __clang__ && defined __has_builtin |
53 | typedef _Bool ecb_bool; |
107 | #define ECB_CLANG_BUILTIN(x) __has_builtin (x) |
54 | # else |
108 | #else |
55 | # define ECB_INLINE static inline /* yeah! */ |
109 | #define ECB_CLANG_BUILTIN(x) 0 |
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110 | #endif |
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111 | |
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112 | #if __clang__ && defined __has_extension |
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113 | #define ECB_CLANG_EXTENSION(x) __has_extension (x) |
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114 | #else |
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115 | #define ECB_CLANG_EXTENSION(x) 0 |
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116 | #endif |
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117 | |
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118 | #define ECB_CPP (__cplusplus+0) |
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119 | #define ECB_CPP11 (__cplusplus >= 201103L) |
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120 | |
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121 | #if ECB_CPP |
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122 | #define ECB_C 0 |
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123 | #define ECB_STDC_VERSION 0 |
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124 | #else |
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125 | #define ECB_C 1 |
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126 | #define ECB_STDC_VERSION __STDC_VERSION__ |
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127 | #endif |
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128 | |
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129 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
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130 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
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131 | |
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132 | #if ECB_CPP |
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133 | #define ECB_EXTERN_C extern "C" |
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134 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
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135 | #define ECB_EXTERN_C_END } |
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136 | #else |
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137 | #define ECB_EXTERN_C extern |
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138 | #define ECB_EXTERN_C_BEG |
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139 | #define ECB_EXTERN_C_END |
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140 | #endif |
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141 | |
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142 | /*****************************************************************************/ |
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143 | |
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144 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
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145 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
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146 | |
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147 | #if ECB_NO_THREADS |
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148 | #define ECB_NO_SMP 1 |
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149 | #endif |
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150 | |
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151 | #if ECB_NO_SMP |
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152 | #define ECB_MEMORY_FENCE do { } while (0) |
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153 | #endif |
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154 | |
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155 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ |
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156 | #if __xlC__ && ECB_CPP |
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157 | #include <builtins.h> |
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158 | #endif |
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159 | |
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160 | #ifndef ECB_MEMORY_FENCE |
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161 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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162 | #if __i386 || __i386__ |
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163 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
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164 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
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165 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
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166 | #elif ECB_GCC_AMD64 |
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167 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
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168 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
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169 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
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170 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
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171 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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172 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
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173 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
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174 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
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175 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
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176 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
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177 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
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178 | #elif __aarch64__ |
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179 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
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180 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
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181 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
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182 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
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183 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
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184 | #elif defined __s390__ || defined __s390x__ |
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185 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
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186 | #elif defined __mips__ |
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187 | /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
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188 | /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ |
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189 | #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
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190 | #elif defined __alpha__ |
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191 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
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192 | #elif defined __hppa__ |
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193 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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194 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
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195 | #elif defined __ia64__ |
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196 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
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197 | #elif defined __m68k__ |
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198 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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199 | #elif defined __m88k__ |
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200 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
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201 | #elif defined __sh__ |
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202 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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203 | #endif |
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204 | #endif |
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205 | #endif |
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206 | |
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207 | #ifndef ECB_MEMORY_FENCE |
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208 | #if ECB_GCC_VERSION(4,7) |
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209 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
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210 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
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211 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
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212 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
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213 | |
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214 | #elif ECB_CLANG_EXTENSION(c_atomic) |
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215 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
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216 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
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217 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
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218 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
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219 | |
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220 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
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221 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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222 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
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223 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
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224 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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225 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
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226 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
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227 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
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228 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
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229 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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230 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
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231 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
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232 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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233 | #elif defined _WIN32 |
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234 | #include <WinNT.h> |
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235 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
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236 | #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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237 | #include <mbarrier.h> |
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238 | #define ECB_MEMORY_FENCE __machine_rw_barrier () |
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239 | #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () |
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240 | #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () |
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241 | #elif __xlC__ |
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242 | #define ECB_MEMORY_FENCE __sync () |
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243 | #endif |
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244 | #endif |
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245 | |
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246 | #ifndef ECB_MEMORY_FENCE |
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247 | #if ECB_C11 && !defined __STDC_NO_ATOMICS__ |
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248 | /* we assume that these memory fences work on all variables/all memory accesses, */ |
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249 | /* not just C11 atomics and atomic accesses */ |
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250 | #include <stdatomic.h> |
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251 | /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */ |
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252 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
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253 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
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254 | /* for most usages, or gcc and clang have a bug */ |
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255 | /* I *currently* lean towards the latter, and inefficiently implement */ |
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256 | /* all three of ecb's fences as a seq_cst fence */ |
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257 | /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
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258 | /* for all __atomic_thread_fence's except seq_cst */ |
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259 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
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260 | #endif |
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261 | #endif |
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262 | |
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263 | #ifndef ECB_MEMORY_FENCE |
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264 | #if !ECB_AVOID_PTHREADS |
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265 | /* |
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266 | * if you get undefined symbol references to pthread_mutex_lock, |
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267 | * or failure to find pthread.h, then you should implement |
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268 | * the ECB_MEMORY_FENCE operations for your cpu/compiler |
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269 | * OR provide pthread.h and link against the posix thread library |
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270 | * of your system. |
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271 | */ |
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272 | #include <pthread.h> |
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273 | #define ECB_NEEDS_PTHREADS 1 |
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274 | #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
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275 | |
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276 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
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277 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
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278 | #endif |
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279 | #endif |
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280 | |
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281 | #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE |
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282 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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283 | #endif |
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284 | |
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285 | #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE |
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286 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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287 | #endif |
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288 | |
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289 | /*****************************************************************************/ |
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290 | |
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291 | #if ECB_CPP |
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292 | #define ecb_inline static inline |
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293 | #elif ECB_GCC_VERSION(2,5) |
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294 | #define ecb_inline static __inline__ |
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295 | #elif ECB_C99 |
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296 | #define ecb_inline static inline |
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297 | #else |
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298 | #define ecb_inline static |
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299 | #endif |
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300 | |
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301 | #if ECB_GCC_VERSION(3,3) |
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302 | #define ecb_restrict __restrict__ |
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303 | #elif ECB_C99 |
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304 | #define ecb_restrict restrict |
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305 | #else |
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306 | #define ecb_restrict |
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307 | #endif |
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308 | |
56 | typedef int ecb_bool; |
309 | typedef int ecb_bool; |
57 | # endif |
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58 | #else |
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59 | # define ECB_INLINE static inline |
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60 | typedef bool ecb_bool; |
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61 | #endif |
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62 | |
310 | |
63 | #define ECB_CONCAT_(a, b) a ## b |
311 | #define ECB_CONCAT_(a, b) a ## b |
64 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
312 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
65 | #define ECB_STRINGIFY_(a) # a |
313 | #define ECB_STRINGIFY_(a) # a |
66 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
314 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
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315 | #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) |
67 | |
316 | |
68 | #define ECB_HEADER_INLINE ECB_INLINE |
317 | #define ecb_function_ ecb_inline |
69 | |
318 | |
70 | #if ECB_GCC_VERSION(3,1) |
319 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
71 | # define ecb_attribute(attrlist) __attribute__(attrlist) |
320 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
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321 | #else |
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322 | #define ecb_attribute(attrlist) |
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323 | #endif |
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324 | |
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325 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) |
72 | # define ecb_is_constant(expr) __builtin_constant_p (expr) |
326 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
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327 | #else |
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328 | /* possible C11 impl for integral types |
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329 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
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330 | #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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331 | |
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332 | #define ecb_is_constant(expr) 0 |
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333 | #endif |
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334 | |
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335 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) |
73 | # define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
336 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
|
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337 | #else |
|
|
338 | #define ecb_expect(expr,value) (expr) |
|
|
339 | #endif |
|
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340 | |
|
|
341 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) |
74 | # define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
342 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
75 | #else |
343 | #else |
76 | # define ecb_attribute(attrlist) |
|
|
77 | # define ecb_is_constant(expr) 0 |
|
|
78 | # define ecb_expect(expr,value) (expr) |
|
|
79 | # define ecb_prefetch(addr,rw,locality) |
344 | #define ecb_prefetch(addr,rw,locality) |
80 | #endif |
345 | #endif |
81 | |
346 | |
82 | /* no emulation for ecb_decltype */ |
347 | /* no emulation for ecb_decltype */ |
|
|
348 | #if ECB_CPP11 |
|
|
349 | // older implementations might have problems with decltype(x)::type, work around it |
|
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350 | template<class T> struct ecb_decltype_t { typedef T type; }; |
|
|
351 | #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type |
|
|
352 | #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) |
|
|
353 | #define ecb_decltype(x) __typeof__ (x) |
|
|
354 | #endif |
|
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355 | |
|
|
356 | #if _MSC_VER >= 1300 |
|
|
357 | #define ecb_deprecated __declspec (deprecated) |
|
|
358 | #else |
|
|
359 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
|
|
360 | #endif |
|
|
361 | |
|
|
362 | #if _MSC_VER >= 1500 |
|
|
363 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
83 | #if ECB_GCC_VERSION(4,5) |
364 | #elif ECB_GCC_VERSION(4,5) |
84 | # define ecb_decltype(x) __decltype(x) |
365 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
85 | #elif ECB_GCC_VERSION(3,0) |
366 | #else |
86 | # define ecb_decltype(x) typeof(x) |
367 | #define ecb_deprecated_message(msg) ecb_deprecated |
87 | #endif |
368 | #endif |
88 | |
369 | |
89 | #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */ |
370 | #if _MSC_VER >= 1400 |
|
|
371 | #define ecb_noinline __declspec (noinline) |
|
|
372 | #else |
90 | #define ecb_noinline ecb_attribute ((__noinline__)) |
373 | #define ecb_noinline ecb_attribute ((__noinline__)) |
91 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
374 | #endif |
|
|
375 | |
92 | #define ecb_unused ecb_attribute ((__unused__)) |
376 | #define ecb_unused ecb_attribute ((__unused__)) |
93 | #define ecb_const ecb_attribute ((__const__)) |
377 | #define ecb_const ecb_attribute ((__const__)) |
94 | #define ecb_pure ecb_attribute ((__pure__)) |
378 | #define ecb_pure ecb_attribute ((__pure__)) |
|
|
379 | |
|
|
380 | #if ECB_C11 || __IBMC_NORETURN |
|
|
381 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ |
|
|
382 | #define ecb_noreturn _Noreturn |
|
|
383 | #elif ECB_CPP11 |
|
|
384 | #define ecb_noreturn [[noreturn]] |
|
|
385 | #elif _MSC_VER >= 1200 |
|
|
386 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ |
|
|
387 | #define ecb_noreturn __declspec (noreturn) |
|
|
388 | #else |
|
|
389 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
|
|
390 | #endif |
|
|
391 | |
|
|
392 | #if ECB_GCC_VERSION(4,3) |
|
|
393 | #define ecb_artificial ecb_attribute ((__artificial__)) |
95 | #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ |
394 | #define ecb_hot ecb_attribute ((__hot__)) |
96 | #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ |
395 | #define ecb_cold ecb_attribute ((__cold__)) |
|
|
396 | #else |
|
|
397 | #define ecb_artificial |
|
|
398 | #define ecb_hot |
|
|
399 | #define ecb_cold |
|
|
400 | #endif |
97 | |
401 | |
98 | /* put into if's if you are very sure that the expression */ |
402 | /* put around conditional expressions if you are very sure that the */ |
99 | /* is mostly true or mostly false. note that these return */ |
403 | /* expression is mostly true or mostly false. note that these return */ |
100 | /* booleans, not the expression. */ |
404 | /* booleans, not the expression. */ |
101 | #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
405 | #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
102 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
406 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
|
|
407 | /* for compatibility to the rest of the world */ |
103 | #define ecb_likely(expr) ecb_expect_true (expr) |
408 | #define ecb_likely(expr) ecb_expect_true (expr) |
104 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
409 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
105 | |
410 | |
|
|
411 | /* count trailing zero bits and count # of one bits */ |
|
|
412 | #if ECB_GCC_VERSION(3,4) \ |
|
|
413 | || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ |
|
|
414 | && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ |
|
|
415 | && ECB_CLANG_BUILTIN(__builtin_popcount)) |
|
|
416 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
|
|
417 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
|
|
418 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
|
|
419 | #define ecb_ctz32(x) __builtin_ctz (x) |
|
|
420 | #define ecb_ctz64(x) __builtin_ctzll (x) |
|
|
421 | #define ecb_popcount32(x) __builtin_popcount (x) |
|
|
422 | /* no popcountll */ |
|
|
423 | #else |
|
|
424 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
|
|
425 | ecb_function_ ecb_const int |
|
|
426 | ecb_ctz32 (uint32_t x) |
|
|
427 | { |
|
|
428 | int r = 0; |
|
|
429 | |
|
|
430 | x &= ~x + 1; /* this isolates the lowest bit */ |
|
|
431 | |
|
|
432 | #if ECB_branchless_on_i386 |
|
|
433 | r += !!(x & 0xaaaaaaaa) << 0; |
|
|
434 | r += !!(x & 0xcccccccc) << 1; |
|
|
435 | r += !!(x & 0xf0f0f0f0) << 2; |
|
|
436 | r += !!(x & 0xff00ff00) << 3; |
|
|
437 | r += !!(x & 0xffff0000) << 4; |
|
|
438 | #else |
|
|
439 | if (x & 0xaaaaaaaa) r += 1; |
|
|
440 | if (x & 0xcccccccc) r += 2; |
|
|
441 | if (x & 0xf0f0f0f0) r += 4; |
|
|
442 | if (x & 0xff00ff00) r += 8; |
|
|
443 | if (x & 0xffff0000) r += 16; |
|
|
444 | #endif |
|
|
445 | |
|
|
446 | return r; |
|
|
447 | } |
|
|
448 | |
|
|
449 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
|
|
450 | ecb_function_ ecb_const int |
|
|
451 | ecb_ctz64 (uint64_t x) |
|
|
452 | { |
|
|
453 | int shift = x & 0xffffffffU ? 0 : 32; |
|
|
454 | return ecb_ctz32 (x >> shift) + shift; |
|
|
455 | } |
|
|
456 | |
|
|
457 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
|
|
458 | ecb_function_ ecb_const int |
|
|
459 | ecb_popcount32 (uint32_t x) |
|
|
460 | { |
|
|
461 | x -= (x >> 1) & 0x55555555; |
|
|
462 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
|
|
463 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
|
|
464 | x *= 0x01010101; |
|
|
465 | |
|
|
466 | return x >> 24; |
|
|
467 | } |
|
|
468 | |
|
|
469 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
|
|
470 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
|
|
471 | { |
|
|
472 | int r = 0; |
|
|
473 | |
|
|
474 | if (x >> 16) { x >>= 16; r += 16; } |
|
|
475 | if (x >> 8) { x >>= 8; r += 8; } |
|
|
476 | if (x >> 4) { x >>= 4; r += 4; } |
|
|
477 | if (x >> 2) { x >>= 2; r += 2; } |
|
|
478 | if (x >> 1) { r += 1; } |
|
|
479 | |
|
|
480 | return r; |
|
|
481 | } |
|
|
482 | |
|
|
483 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
|
|
484 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
|
|
485 | { |
|
|
486 | int r = 0; |
|
|
487 | |
|
|
488 | if (x >> 32) { x >>= 32; r += 32; } |
|
|
489 | |
|
|
490 | return r + ecb_ld32 (x); |
|
|
491 | } |
|
|
492 | #endif |
|
|
493 | |
|
|
494 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
|
|
495 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
|
|
496 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
|
|
497 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
|
|
498 | |
|
|
499 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
|
|
500 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
|
|
501 | { |
|
|
502 | return ( (x * 0x0802U & 0x22110U) |
|
|
503 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
|
|
504 | } |
|
|
505 | |
|
|
506 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
|
|
507 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
|
|
508 | { |
|
|
509 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
|
|
510 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
|
|
511 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
|
|
512 | x = ( x >> 8 ) | ( x << 8); |
|
|
513 | |
|
|
514 | return x; |
|
|
515 | } |
|
|
516 | |
|
|
517 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
|
|
518 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
|
|
519 | { |
|
|
520 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
|
|
521 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
|
|
522 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
|
|
523 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
|
|
524 | x = ( x >> 16 ) | ( x << 16); |
|
|
525 | |
|
|
526 | return x; |
|
|
527 | } |
|
|
528 | |
|
|
529 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
|
|
530 | /* so for this version we are lazy */ |
|
|
531 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
|
|
532 | ecb_function_ ecb_const int |
|
|
533 | ecb_popcount64 (uint64_t x) |
|
|
534 | { |
|
|
535 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
|
|
536 | } |
|
|
537 | |
|
|
538 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
|
|
539 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
|
|
540 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
|
|
541 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
|
|
542 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
|
|
543 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
|
|
544 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
|
|
545 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
|
|
546 | |
|
|
547 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
|
|
548 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
|
|
549 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
|
|
550 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
|
|
551 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
|
|
552 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
|
|
553 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
|
|
554 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
|
|
555 | |
|
|
556 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
|
|
557 | #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) |
|
|
558 | #define ecb_bswap16(x) __builtin_bswap16 (x) |
|
|
559 | #else |
|
|
560 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
|
|
561 | #endif |
|
|
562 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
|
|
563 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
|
|
564 | #elif _MSC_VER |
|
|
565 | #include <stdlib.h> |
|
|
566 | #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) |
|
|
567 | #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) |
|
|
568 | #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) |
|
|
569 | #else |
|
|
570 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
|
|
571 | ecb_function_ ecb_const uint16_t |
|
|
572 | ecb_bswap16 (uint16_t x) |
|
|
573 | { |
|
|
574 | return ecb_rotl16 (x, 8); |
|
|
575 | } |
|
|
576 | |
|
|
577 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
|
|
578 | ecb_function_ ecb_const uint32_t |
|
|
579 | ecb_bswap32 (uint32_t x) |
|
|
580 | { |
|
|
581 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
|
|
582 | } |
|
|
583 | |
|
|
584 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
|
|
585 | ecb_function_ ecb_const uint64_t |
|
|
586 | ecb_bswap64 (uint64_t x) |
|
|
587 | { |
|
|
588 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
|
|
589 | } |
|
|
590 | #endif |
|
|
591 | |
|
|
592 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
|
|
593 | #define ecb_unreachable() __builtin_unreachable () |
|
|
594 | #else |
|
|
595 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
|
|
596 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
|
|
597 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
|
|
598 | #endif |
|
|
599 | |
106 | /* try to tell the compiler that some condition is definitely true */ |
600 | /* try to tell the compiler that some condition is definitely true */ |
107 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
601 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
108 | |
602 | |
109 | /* count trailing zero bits and count # of one bits */ |
603 | ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); |
110 | #if ECB_GCC_VERSION(3,4) |
604 | ecb_inline ecb_const unsigned char |
111 | #define ecb_ctz32(x) __builtin_ctz (x) |
|
|
112 | #define ecb_popcount32(x) __builtin_popcount (x) |
|
|
113 | #else |
|
|
114 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
|
|
115 | ECB_HEADER_INLINE int |
|
|
116 | ecb_ctz32 (uint32_t x) |
|
|
117 | { |
|
|
118 | int r = 0; |
|
|
119 | |
|
|
120 | x &= -x; /* this isolates the lowest bit */ |
|
|
121 | |
|
|
122 | if (x & 0xaaaaaaaa) r += 1; |
|
|
123 | if (x & 0xcccccccc) r += 2; |
|
|
124 | if (x & 0xf0f0f0f0) r += 4; |
|
|
125 | if (x & 0xff00ff00) r += 8; |
|
|
126 | if (x & 0xffff0000) r += 16; |
|
|
127 | |
|
|
128 | return r; |
|
|
129 | } |
|
|
130 | |
|
|
131 | ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; |
|
|
132 | ECB_HEADER_INLINE int |
|
|
133 | ecb_popcount32 (uint32_t x) |
|
|
134 | { |
|
|
135 | x -= (x >> 1) & 0x55555555; |
|
|
136 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
|
|
137 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
|
|
138 | x *= 0x01010101; |
|
|
139 | |
|
|
140 | return x >> 24; |
|
|
141 | } |
|
|
142 | #endif |
|
|
143 | |
|
|
144 | #if ECB_GCC_VERSION(4,3) |
|
|
145 | # define ecb_bswap32(x) __builtin_bswap32 (x) |
|
|
146 | # define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
|
|
147 | #else |
|
|
148 | ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
|
|
149 | ECB_HEADER_INLINE uint32_t |
|
|
150 | ecb_bswap32 (uint32_t x) |
|
|
151 | { |
|
|
152 | return (x >> 24) |
|
|
153 | | ((x >> 8) & 0x0000ff00) |
|
|
154 | | ((x << 8) & 0x00ff0000) |
|
|
155 | | (x << 24); |
|
|
156 | } |
|
|
157 | |
|
|
158 | ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
|
|
159 | ECB_HEADER_INLINE uint32_t |
|
|
160 | ecb_bswap16 (uint32_t x) |
|
|
161 | { |
|
|
162 | return ((x >> 8) & 0xff) |
|
|
163 | | ((x << 8) & 0x00ff0000) |
|
|
164 | | (x << 24); |
|
|
165 | } |
|
|
166 | #endif |
|
|
167 | |
|
|
168 | #if ECB_GCC_VERSION(4,5) |
|
|
169 | # define ecb_unreachable() __builtin_unreachable () |
|
|
170 | #else |
|
|
171 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
|
|
172 | ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; |
|
|
173 | ECB_HEADER_INLINE void ecb_unreachable (void) { } |
|
|
174 | #endif |
|
|
175 | |
|
|
176 | ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; |
|
|
177 | ECB_HEADER_INLINE unsigned char |
|
|
178 | ecb_byteorder_helper (void) |
605 | ecb_byteorder_helper (void) |
179 | { |
606 | { |
180 | const uint32_t u = 0x11223344; |
607 | /* the union code still generates code under pressure in gcc, */ |
181 | return *(unsigned char *)&u; |
608 | /* but less than using pointers, and always seems to */ |
|
|
609 | /* successfully return a constant. */ |
|
|
610 | /* the reason why we have this horrible preprocessor mess */ |
|
|
611 | /* is to avoid it in all cases, at least on common architectures */ |
|
|
612 | /* or when using a recent enough gcc version (>= 4.6) */ |
|
|
613 | #if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
|
|
614 | return 0x44; |
|
|
615 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
|
|
616 | return 0x44; |
|
|
617 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
|
|
618 | return 0x11; |
|
|
619 | #else |
|
|
620 | union |
|
|
621 | { |
|
|
622 | uint32_t i; |
|
|
623 | uint8_t c; |
|
|
624 | } u = { 0x11223344 }; |
|
|
625 | return u.c; |
|
|
626 | #endif |
182 | } |
627 | } |
183 | |
628 | |
184 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) ecb_const; |
629 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
185 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
630 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
186 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; |
631 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
187 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
632 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
188 | |
633 | |
189 | #if ECB_GCC_VERSION(3,0) |
634 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
190 | # define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
635 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
191 | #else |
636 | #else |
192 | # define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
637 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
|
|
638 | #endif |
|
|
639 | |
|
|
640 | #if ECB_CPP |
|
|
641 | template<typename T> |
|
|
642 | static inline T ecb_div_rd (T val, T div) |
|
|
643 | { |
|
|
644 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
|
|
645 | } |
|
|
646 | template<typename T> |
|
|
647 | static inline T ecb_div_ru (T val, T div) |
|
|
648 | { |
|
|
649 | return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; |
|
|
650 | } |
|
|
651 | #else |
|
|
652 | #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
|
|
653 | #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
193 | #endif |
654 | #endif |
194 | |
655 | |
195 | #if ecb_cplusplus_does_not_suck |
656 | #if ecb_cplusplus_does_not_suck |
196 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
657 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
197 | template<typename T, int N> |
658 | template<typename T, int N> |
198 | static inline int ecb_array_length (const T (&arr)[N]) |
659 | static inline int ecb_array_length (const T (&arr)[N]) |
199 | { |
660 | { |
200 | return N; |
661 | return N; |
201 | } |
662 | } |
202 | #else |
663 | #else |
203 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
664 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
|
|
665 | #endif |
|
|
666 | |
|
|
667 | /*******************************************************************************/ |
|
|
668 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
|
|
669 | |
|
|
670 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
|
|
671 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
|
|
672 | #if 0 \ |
|
|
673 | || __i386 || __i386__ \ |
|
|
674 | || ECB_GCC_AMD64 \ |
|
|
675 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
|
|
676 | || defined __s390__ || defined __s390x__ \ |
|
|
677 | || defined __mips__ \ |
|
|
678 | || defined __alpha__ \ |
|
|
679 | || defined __hppa__ \ |
|
|
680 | || defined __ia64__ \ |
|
|
681 | || defined __m68k__ \ |
|
|
682 | || defined __m88k__ \ |
|
|
683 | || defined __sh__ \ |
|
|
684 | || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ |
|
|
685 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
|
|
686 | || defined __aarch64__ |
|
|
687 | #define ECB_STDFP 1 |
|
|
688 | #include <string.h> /* for memcpy */ |
|
|
689 | #else |
|
|
690 | #define ECB_STDFP 0 |
|
|
691 | #endif |
|
|
692 | |
|
|
693 | #ifndef ECB_NO_LIBM |
|
|
694 | |
|
|
695 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
|
|
696 | |
|
|
697 | /* only the oldest of old doesn't have this one. solaris. */ |
|
|
698 | #ifdef INFINITY |
|
|
699 | #define ECB_INFINITY INFINITY |
|
|
700 | #else |
|
|
701 | #define ECB_INFINITY HUGE_VAL |
204 | #endif |
702 | #endif |
205 | |
703 | |
206 | ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
704 | #ifdef NAN |
207 | ECB_INLINE uint32_t |
705 | #define ECB_NAN NAN |
208 | ecb_rotr32 (uint32_t x, unsigned int count) |
706 | #else |
209 | { |
707 | #define ECB_NAN ECB_INFINITY |
210 | return (x << (32 - count)) | (x >> count); |
|
|
211 | } |
|
|
212 | |
|
|
213 | ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
|
|
214 | ECB_INLINE uint32_t |
|
|
215 | ecb_rotl32 (uint32_t x, unsigned int count) |
|
|
216 | { |
|
|
217 | return (x >> (32 - count)) | (x << count); |
|
|
218 | } |
|
|
219 | |
|
|
220 | #endif |
708 | #endif |
221 | |
709 | |
|
|
710 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
|
|
711 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
|
|
712 | #define ecb_frexpf(x,e) frexpf ((x), (e)) |
|
|
713 | #else |
|
|
714 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
|
|
715 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
|
|
716 | #endif |
|
|
717 | |
|
|
718 | /* converts an ieee half/binary16 to a float */ |
|
|
719 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
|
|
720 | ecb_function_ ecb_const float |
|
|
721 | ecb_binary16_to_float (uint16_t x) |
|
|
722 | { |
|
|
723 | int e = (x >> 10) & 0x1f; |
|
|
724 | int m = x & 0x3ff; |
|
|
725 | float r; |
|
|
726 | |
|
|
727 | if (!e ) r = ecb_ldexpf (m , -24); |
|
|
728 | else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); |
|
|
729 | else if (m ) r = ECB_NAN; |
|
|
730 | else r = ECB_INFINITY; |
|
|
731 | |
|
|
732 | return x & 0x8000 ? -r : r; |
|
|
733 | } |
|
|
734 | |
|
|
735 | /* convert a float to ieee single/binary32 */ |
|
|
736 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
|
|
737 | ecb_function_ ecb_const uint32_t |
|
|
738 | ecb_float_to_binary32 (float x) |
|
|
739 | { |
|
|
740 | uint32_t r; |
|
|
741 | |
|
|
742 | #if ECB_STDFP |
|
|
743 | memcpy (&r, &x, 4); |
|
|
744 | #else |
|
|
745 | /* slow emulation, works for anything but -0 */ |
|
|
746 | uint32_t m; |
|
|
747 | int e; |
|
|
748 | |
|
|
749 | if (x == 0e0f ) return 0x00000000U; |
|
|
750 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
|
|
751 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
|
|
752 | if (x != x ) return 0x7fbfffffU; |
|
|
753 | |
|
|
754 | m = ecb_frexpf (x, &e) * 0x1000000U; |
|
|
755 | |
|
|
756 | r = m & 0x80000000U; |
|
|
757 | |
|
|
758 | if (r) |
|
|
759 | m = -m; |
|
|
760 | |
|
|
761 | if (e <= -126) |
|
|
762 | { |
|
|
763 | m &= 0xffffffU; |
|
|
764 | m >>= (-125 - e); |
|
|
765 | e = -126; |
|
|
766 | } |
|
|
767 | |
|
|
768 | r |= (e + 126) << 23; |
|
|
769 | r |= m & 0x7fffffU; |
|
|
770 | #endif |
|
|
771 | |
|
|
772 | return r; |
|
|
773 | } |
|
|
774 | |
|
|
775 | /* converts an ieee single/binary32 to a float */ |
|
|
776 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
|
|
777 | ecb_function_ ecb_const float |
|
|
778 | ecb_binary32_to_float (uint32_t x) |
|
|
779 | { |
|
|
780 | float r; |
|
|
781 | |
|
|
782 | #if ECB_STDFP |
|
|
783 | memcpy (&r, &x, 4); |
|
|
784 | #else |
|
|
785 | /* emulation, only works for normals and subnormals and +0 */ |
|
|
786 | int neg = x >> 31; |
|
|
787 | int e = (x >> 23) & 0xffU; |
|
|
788 | |
|
|
789 | x &= 0x7fffffU; |
|
|
790 | |
|
|
791 | if (e) |
|
|
792 | x |= 0x800000U; |
|
|
793 | else |
|
|
794 | e = 1; |
|
|
795 | |
|
|
796 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
|
|
797 | r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); |
|
|
798 | |
|
|
799 | r = neg ? -r : r; |
|
|
800 | #endif |
|
|
801 | |
|
|
802 | return r; |
|
|
803 | } |
|
|
804 | |
|
|
805 | /* convert a double to ieee double/binary64 */ |
|
|
806 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
|
|
807 | ecb_function_ ecb_const uint64_t |
|
|
808 | ecb_double_to_binary64 (double x) |
|
|
809 | { |
|
|
810 | uint64_t r; |
|
|
811 | |
|
|
812 | #if ECB_STDFP |
|
|
813 | memcpy (&r, &x, 8); |
|
|
814 | #else |
|
|
815 | /* slow emulation, works for anything but -0 */ |
|
|
816 | uint64_t m; |
|
|
817 | int e; |
|
|
818 | |
|
|
819 | if (x == 0e0 ) return 0x0000000000000000U; |
|
|
820 | if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; |
|
|
821 | if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; |
|
|
822 | if (x != x ) return 0X7ff7ffffffffffffU; |
|
|
823 | |
|
|
824 | m = frexp (x, &e) * 0x20000000000000U; |
|
|
825 | |
|
|
826 | r = m & 0x8000000000000000;; |
|
|
827 | |
|
|
828 | if (r) |
|
|
829 | m = -m; |
|
|
830 | |
|
|
831 | if (e <= -1022) |
|
|
832 | { |
|
|
833 | m &= 0x1fffffffffffffU; |
|
|
834 | m >>= (-1021 - e); |
|
|
835 | e = -1022; |
|
|
836 | } |
|
|
837 | |
|
|
838 | r |= ((uint64_t)(e + 1022)) << 52; |
|
|
839 | r |= m & 0xfffffffffffffU; |
|
|
840 | #endif |
|
|
841 | |
|
|
842 | return r; |
|
|
843 | } |
|
|
844 | |
|
|
845 | /* converts an ieee double/binary64 to a double */ |
|
|
846 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
|
|
847 | ecb_function_ ecb_const double |
|
|
848 | ecb_binary64_to_double (uint64_t x) |
|
|
849 | { |
|
|
850 | double r; |
|
|
851 | |
|
|
852 | #if ECB_STDFP |
|
|
853 | memcpy (&r, &x, 8); |
|
|
854 | #else |
|
|
855 | /* emulation, only works for normals and subnormals and +0 */ |
|
|
856 | int neg = x >> 63; |
|
|
857 | int e = (x >> 52) & 0x7ffU; |
|
|
858 | |
|
|
859 | x &= 0xfffffffffffffU; |
|
|
860 | |
|
|
861 | if (e) |
|
|
862 | x |= 0x10000000000000U; |
|
|
863 | else |
|
|
864 | e = 1; |
|
|
865 | |
|
|
866 | /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ |
|
|
867 | r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); |
|
|
868 | |
|
|
869 | r = neg ? -r : r; |
|
|
870 | #endif |
|
|
871 | |
|
|
872 | return r; |
|
|
873 | } |
|
|
874 | |
|
|
875 | #endif |
|
|
876 | |
|
|
877 | #endif |
|
|
878 | |