| 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 |
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43 | |
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44 | /* 16 bits major, 16 bits minor */ |
|
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45 | #define ECB_VERSION 0x00010008 |
| 32 | |
46 | |
| 33 | #ifdef _WIN32 |
47 | #ifdef _WIN32 |
| 34 | typedef signed char int8_t; |
48 | typedef signed char int8_t; |
| 35 | typedef unsigned char uint8_t; |
49 | typedef unsigned char uint8_t; |
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50 | typedef signed char int_fast8_t; |
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51 | typedef unsigned char uint_fast8_t; |
| 36 | typedef signed short int16_t; |
52 | typedef signed short int16_t; |
| 37 | typedef unsigned short uint16_t; |
53 | typedef unsigned short uint16_t; |
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54 | typedef signed int int_fast16_t; |
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55 | typedef unsigned int uint_fast16_t; |
| 38 | typedef signed int int32_t; |
56 | typedef signed int int32_t; |
| 39 | typedef unsigned int uint32_t; |
57 | typedef unsigned int uint32_t; |
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58 | typedef signed int int_fast32_t; |
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59 | typedef unsigned int uint_fast32_t; |
| 40 | #if __GNUC__ |
60 | #if __GNUC__ |
| 41 | typedef signed long long int64_t; |
61 | typedef signed long long int64_t; |
| 42 | typedef unsigned long long uint64_t; |
62 | typedef unsigned long long uint64_t; |
| 43 | #else |
63 | #else /* _MSC_VER || __BORLANDC__ */ |
| 44 | typedef signed __int64 int64_t; |
64 | typedef signed __int64 int64_t; |
| 45 | typedef unsigned __int64 uint64_t; |
65 | typedef unsigned __int64 uint64_t; |
| 46 | #endif |
66 | #endif |
|
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67 | typedef int64_t int_fast64_t; |
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68 | typedef uint64_t uint_fast64_t; |
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69 | #ifdef _WIN64 |
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70 | #define ECB_PTRSIZE 8 |
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71 | typedef uint64_t uintptr_t; |
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72 | typedef int64_t intptr_t; |
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73 | #else |
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74 | #define ECB_PTRSIZE 4 |
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75 | typedef uint32_t uintptr_t; |
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76 | typedef int32_t intptr_t; |
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77 | #endif |
| 47 | #else |
78 | #else |
| 48 | #include <inttypes.h> |
79 | #include <inttypes.h> |
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80 | #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU |
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81 | #define ECB_PTRSIZE 8 |
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82 | #else |
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83 | #define ECB_PTRSIZE 4 |
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84 | #endif |
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85 | #endif |
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86 | |
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87 | #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) |
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88 | #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) |
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89 | |
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90 | #ifndef ECB_OPTIMIZE_SIZE |
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91 | #if __OPTIMIZE_SIZE__ |
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92 | #define ECB_OPTIMIZE_SIZE 1 |
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93 | #else |
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94 | #define ECB_OPTIMIZE_SIZE 0 |
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95 | #endif |
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96 | #endif |
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97 | |
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98 | /* work around x32 idiocy by defining proper macros */ |
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99 | #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
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100 | #if _ILP32 |
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101 | #define ECB_AMD64_X32 1 |
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102 | #else |
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103 | #define ECB_AMD64 1 |
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104 | #endif |
| 49 | #endif |
105 | #endif |
| 50 | |
106 | |
| 51 | /* many compilers define _GNUC_ to some versions but then only implement |
107 | /* many compilers define _GNUC_ to some versions but then only implement |
| 52 | * what their idiot authors think are the "more important" extensions, |
108 | * what their idiot authors think are the "more important" extensions, |
| 53 | * causing enourmous grief in return for some better fake benchmark numbers. |
109 | * causing enormous grief in return for some better fake benchmark numbers. |
| 54 | * or so. |
110 | * or so. |
| 55 | * we try to detect these and simply assume they are not gcc - if they have |
111 | * we try to detect these and simply assume they are not gcc - if they have |
| 56 | * an issue with that they should have done it right in the first place. |
112 | * an issue with that they should have done it right in the first place. |
| 57 | */ |
113 | */ |
| 58 | #ifndef ECB_GCC_VERSION |
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| 59 | #if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) |
114 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
| 60 | #define ECB_GCC_VERSION(major,minor) 0 |
115 | #define ECB_GCC_VERSION(major,minor) 0 |
| 61 | #else |
116 | #else |
| 62 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
117 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
| 63 | #endif |
118 | #endif |
| 64 | #endif |
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| 65 | |
119 | |
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120 | #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) |
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121 | |
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122 | #if __clang__ && defined __has_builtin |
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123 | #define ECB_CLANG_BUILTIN(x) __has_builtin (x) |
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124 | #else |
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125 | #define ECB_CLANG_BUILTIN(x) 0 |
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126 | #endif |
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127 | |
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128 | #if __clang__ && defined __has_extension |
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129 | #define ECB_CLANG_EXTENSION(x) __has_extension (x) |
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130 | #else |
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131 | #define ECB_CLANG_EXTENSION(x) 0 |
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132 | #endif |
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133 | |
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134 | #define ECB_CPP (__cplusplus+0) |
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135 | #define ECB_CPP11 (__cplusplus >= 201103L) |
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136 | #define ECB_CPP14 (__cplusplus >= 201402L) |
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137 | #define ECB_CPP17 (__cplusplus >= 201703L) |
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138 | |
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139 | #if ECB_CPP |
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140 | #define ECB_C 0 |
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141 | #define ECB_STDC_VERSION 0 |
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142 | #else |
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143 | #define ECB_C 1 |
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144 | #define ECB_STDC_VERSION __STDC_VERSION__ |
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145 | #endif |
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146 | |
| 66 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
147 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
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148 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
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149 | #define ECB_C17 (ECB_STDC_VERSION >= 201710L) |
| 67 | |
150 | |
| 68 | #if __cplusplus |
151 | #if ECB_CPP |
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152 | #define ECB_EXTERN_C extern "C" |
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153 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
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154 | #define ECB_EXTERN_C_END } |
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155 | #else |
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156 | #define ECB_EXTERN_C extern |
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157 | #define ECB_EXTERN_C_BEG |
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158 | #define ECB_EXTERN_C_END |
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159 | #endif |
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160 | |
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161 | /*****************************************************************************/ |
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162 | |
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163 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
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164 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
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165 | |
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166 | #if ECB_NO_THREADS |
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167 | #define ECB_NO_SMP 1 |
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168 | #endif |
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169 | |
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170 | #if ECB_NO_SMP |
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171 | #define ECB_MEMORY_FENCE do { } while (0) |
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172 | #endif |
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173 | |
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174 | /* 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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175 | #if __xlC__ && ECB_CPP |
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176 | #include <builtins.h> |
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177 | #endif |
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178 | |
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179 | #if 1400 <= _MSC_VER |
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180 | #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ |
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181 | #endif |
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182 | |
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183 | #ifndef ECB_MEMORY_FENCE |
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184 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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185 | #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory") |
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186 | #if __i386 || __i386__ |
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187 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
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188 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
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189 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") |
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190 | #elif ECB_GCC_AMD64 |
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191 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
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192 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
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193 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") |
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194 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
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195 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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196 | #elif defined __ARM_ARCH_2__ \ |
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197 | || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \ |
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198 | || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \ |
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199 | || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \ |
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200 | || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \ |
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201 | || defined __ARM_ARCH_5TEJ__ |
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202 | /* should not need any, unless running old code on newer cpu - arm doesn't support that */ |
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203 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
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204 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \ |
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205 | || defined __ARM_ARCH_6T2__ |
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206 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
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207 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
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208 | || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ |
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209 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
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210 | #elif __aarch64__ |
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211 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
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212 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
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213 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
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214 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
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215 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
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216 | #elif defined __s390__ || defined __s390x__ |
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217 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
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218 | #elif defined __mips__ |
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219 | /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
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220 | /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ |
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221 | #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
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222 | #elif defined __alpha__ |
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223 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
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224 | #elif defined __hppa__ |
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225 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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226 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
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227 | #elif defined __ia64__ |
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228 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
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229 | #elif defined __m68k__ |
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230 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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231 | #elif defined __m88k__ |
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232 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
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233 | #elif defined __sh__ |
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234 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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235 | #endif |
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236 | #endif |
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237 | #endif |
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238 | |
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239 | #ifndef ECB_MEMORY_FENCE |
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240 | #if ECB_GCC_VERSION(4,7) |
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241 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
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242 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
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243 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
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244 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
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245 | #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED) |
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246 | |
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247 | #elif ECB_CLANG_EXTENSION(c_atomic) |
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248 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
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249 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
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250 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
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251 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
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252 | #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED) |
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253 | |
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254 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
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255 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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256 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
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257 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
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258 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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259 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
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260 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
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261 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
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262 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
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263 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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264 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
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265 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
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266 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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267 | #elif defined _WIN32 |
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268 | #include <WinNT.h> |
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269 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
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270 | #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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271 | #include <mbarrier.h> |
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272 | #define ECB_MEMORY_FENCE __machine_rw_barrier () |
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273 | #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier () |
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274 | #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier () |
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275 | #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier () |
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276 | #elif __xlC__ |
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277 | #define ECB_MEMORY_FENCE __sync () |
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278 | #endif |
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279 | #endif |
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280 | |
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281 | #ifndef ECB_MEMORY_FENCE |
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282 | #if ECB_C11 && !defined __STDC_NO_ATOMICS__ |
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283 | /* we assume that these memory fences work on all variables/all memory accesses, */ |
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284 | /* not just C11 atomics and atomic accesses */ |
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285 | #include <stdatomic.h> |
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286 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
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287 | #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire) |
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288 | #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release) |
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289 | #endif |
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290 | #endif |
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291 | |
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292 | #ifndef ECB_MEMORY_FENCE |
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293 | #if !ECB_AVOID_PTHREADS |
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294 | /* |
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295 | * if you get undefined symbol references to pthread_mutex_lock, |
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296 | * or failure to find pthread.h, then you should implement |
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297 | * the ECB_MEMORY_FENCE operations for your cpu/compiler |
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298 | * OR provide pthread.h and link against the posix thread library |
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299 | * of your system. |
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300 | */ |
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301 | #include <pthread.h> |
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302 | #define ECB_NEEDS_PTHREADS 1 |
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303 | #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
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304 | |
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305 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
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306 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
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307 | #endif |
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308 | #endif |
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309 | |
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310 | #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE |
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311 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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312 | #endif |
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313 | |
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314 | #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE |
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315 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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316 | #endif |
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317 | |
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318 | #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE |
|
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319 | #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */ |
|
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320 | #endif |
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321 | |
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322 | /*****************************************************************************/ |
|
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323 | |
|
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324 | #if ECB_CPP |
| 69 | #define ecb_inline static inline |
325 | #define ecb_inline static inline |
| 70 | #elif ECB_GCC_VERSION(2,5) |
326 | #elif ECB_GCC_VERSION(2,5) |
| 71 | #define ecb_inline static __inline__ |
327 | #define ecb_inline static __inline__ |
| 72 | #elif ECB_C99 |
328 | #elif ECB_C99 |
| 73 | #define ecb_inline static inline |
329 | #define ecb_inline static inline |
| … | |
… | |
| 87 | |
343 | |
| 88 | #define ECB_CONCAT_(a, b) a ## b |
344 | #define ECB_CONCAT_(a, b) a ## b |
| 89 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
345 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
| 90 | #define ECB_STRINGIFY_(a) # a |
346 | #define ECB_STRINGIFY_(a) # a |
| 91 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
347 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
|
|
348 | #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) |
| 92 | |
349 | |
| 93 | #define ecb_function_ ecb_inline |
350 | #define ecb_function_ ecb_inline |
| 94 | |
351 | |
| 95 | #if ECB_GCC_VERSION(3,1) |
352 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
| 96 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
353 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
|
|
354 | #else |
|
|
355 | #define ecb_attribute(attrlist) |
|
|
356 | #endif |
|
|
357 | |
|
|
358 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) |
| 97 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
359 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
|
|
360 | #else |
|
|
361 | /* possible C11 impl for integral types |
|
|
362 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
|
|
363 | #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */ |
|
|
364 | |
|
|
365 | #define ecb_is_constant(expr) 0 |
|
|
366 | #endif |
|
|
367 | |
|
|
368 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) |
| 98 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
369 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
|
|
370 | #else |
|
|
371 | #define ecb_expect(expr,value) (expr) |
|
|
372 | #endif |
|
|
373 | |
|
|
374 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) |
| 99 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
375 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
| 100 | #else |
376 | #else |
| 101 | #define ecb_attribute(attrlist) |
|
|
| 102 | #define ecb_is_constant(expr) 0 |
|
|
| 103 | #define ecb_expect(expr,value) (expr) |
|
|
| 104 | #define ecb_prefetch(addr,rw,locality) |
377 | #define ecb_prefetch(addr,rw,locality) |
| 105 | #endif |
378 | #endif |
| 106 | |
379 | |
| 107 | /* no emulation for ecb_decltype */ |
380 | /* no emulation for ecb_decltype */ |
| 108 | #if ECB_GCC_VERSION(4,5) |
381 | #if ECB_CPP11 |
|
|
382 | // older implementations might have problems with decltype(x)::type, work around it |
|
|
383 | template<class T> struct ecb_decltype_t { typedef T type; }; |
| 109 | #define ecb_decltype(x) __decltype(x) |
384 | #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type |
| 110 | #elif ECB_GCC_VERSION(3,0) |
385 | #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) |
| 111 | #define ecb_decltype(x) __typeof(x) |
386 | #define ecb_decltype(x) __typeof__ (x) |
| 112 | #endif |
387 | #endif |
| 113 | |
388 | |
|
|
389 | #if _MSC_VER >= 1300 |
|
|
390 | #define ecb_deprecated __declspec (deprecated) |
|
|
391 | #else |
|
|
392 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
|
|
393 | #endif |
|
|
394 | |
|
|
395 | #if _MSC_VER >= 1500 |
|
|
396 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
|
|
397 | #elif ECB_GCC_VERSION(4,5) |
|
|
398 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
|
|
399 | #else |
|
|
400 | #define ecb_deprecated_message(msg) ecb_deprecated |
|
|
401 | #endif |
|
|
402 | |
|
|
403 | #if _MSC_VER >= 1400 |
|
|
404 | #define ecb_noinline __declspec (noinline) |
|
|
405 | #else |
| 114 | #define ecb_noinline ecb_attribute ((__noinline__)) |
406 | #define ecb_noinline ecb_attribute ((__noinline__)) |
| 115 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
407 | #endif |
|
|
408 | |
| 116 | #define ecb_unused ecb_attribute ((__unused__)) |
409 | #define ecb_unused ecb_attribute ((__unused__)) |
| 117 | #define ecb_const ecb_attribute ((__const__)) |
410 | #define ecb_const ecb_attribute ((__const__)) |
| 118 | #define ecb_pure ecb_attribute ((__pure__)) |
411 | #define ecb_pure ecb_attribute ((__pure__)) |
|
|
412 | |
|
|
413 | #if ECB_C11 || __IBMC_NORETURN |
|
|
414 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ |
|
|
415 | #define ecb_noreturn _Noreturn |
|
|
416 | #elif ECB_CPP11 |
|
|
417 | #define ecb_noreturn [[noreturn]] |
|
|
418 | #elif _MSC_VER >= 1200 |
|
|
419 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ |
|
|
420 | #define ecb_noreturn __declspec (noreturn) |
|
|
421 | #else |
|
|
422 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
|
|
423 | #endif |
| 119 | |
424 | |
| 120 | #if ECB_GCC_VERSION(4,3) |
425 | #if ECB_GCC_VERSION(4,3) |
| 121 | #define ecb_artificial ecb_attribute ((__artificial__)) |
426 | #define ecb_artificial ecb_attribute ((__artificial__)) |
| 122 | #define ecb_hot ecb_attribute ((__hot__)) |
427 | #define ecb_hot ecb_attribute ((__hot__)) |
| 123 | #define ecb_cold ecb_attribute ((__cold__)) |
428 | #define ecb_cold ecb_attribute ((__cold__)) |
| … | |
… | |
| 135 | /* for compatibility to the rest of the world */ |
440 | /* for compatibility to the rest of the world */ |
| 136 | #define ecb_likely(expr) ecb_expect_true (expr) |
441 | #define ecb_likely(expr) ecb_expect_true (expr) |
| 137 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
442 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
| 138 | |
443 | |
| 139 | /* count trailing zero bits and count # of one bits */ |
444 | /* count trailing zero bits and count # of one bits */ |
| 140 | #if ECB_GCC_VERSION(3,4) |
445 | #if ECB_GCC_VERSION(3,4) \ |
|
|
446 | || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ |
|
|
447 | && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ |
|
|
448 | && ECB_CLANG_BUILTIN(__builtin_popcount)) |
|
|
449 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
|
|
450 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
|
|
451 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
| 141 | #define ecb_ctz32(x) __builtin_ctz (x) |
452 | #define ecb_ctz32(x) __builtin_ctz (x) |
|
|
453 | #define ecb_ctz64(x) __builtin_ctzll (x) |
| 142 | #define ecb_popcount32(x) __builtin_popcount (x) |
454 | #define ecb_popcount32(x) __builtin_popcount (x) |
|
|
455 | /* no popcountll */ |
| 143 | #else |
456 | #else |
| 144 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
457 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
| 145 | ecb_function_ int |
458 | ecb_function_ ecb_const int |
| 146 | ecb_ctz32 (uint32_t x) |
459 | ecb_ctz32 (uint32_t x) |
| 147 | { |
460 | { |
|
|
461 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
|
462 | unsigned long r; |
|
|
463 | _BitScanForward (&r, x); |
|
|
464 | return (int)r; |
|
|
465 | #else |
| 148 | int r = 0; |
466 | int r = 0; |
| 149 | |
467 | |
| 150 | x &= (uint32_t)-(int32_t)x; /* this isolates the lowest bit */ |
468 | x &= ~x + 1; /* this isolates the lowest bit */ |
| 151 | |
469 | |
|
|
470 | #if ECB_branchless_on_i386 |
|
|
471 | r += !!(x & 0xaaaaaaaa) << 0; |
|
|
472 | r += !!(x & 0xcccccccc) << 1; |
|
|
473 | r += !!(x & 0xf0f0f0f0) << 2; |
|
|
474 | r += !!(x & 0xff00ff00) << 3; |
|
|
475 | r += !!(x & 0xffff0000) << 4; |
|
|
476 | #else |
| 152 | if (x & 0xaaaaaaaa) r += 1; |
477 | if (x & 0xaaaaaaaa) r += 1; |
| 153 | if (x & 0xcccccccc) r += 2; |
478 | if (x & 0xcccccccc) r += 2; |
| 154 | if (x & 0xf0f0f0f0) r += 4; |
479 | if (x & 0xf0f0f0f0) r += 4; |
| 155 | if (x & 0xff00ff00) r += 8; |
480 | if (x & 0xff00ff00) r += 8; |
| 156 | if (x & 0xffff0000) r += 16; |
481 | if (x & 0xffff0000) r += 16; |
|
|
482 | #endif |
| 157 | |
483 | |
| 158 | return r; |
484 | return r; |
|
|
485 | #endif |
| 159 | } |
486 | } |
| 160 | |
487 | |
|
|
488 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
|
|
489 | ecb_function_ ecb_const int |
|
|
490 | ecb_ctz64 (uint64_t x) |
|
|
491 | { |
|
|
492 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
493 | unsigned long r; |
|
|
494 | _BitScanForward64 (&r, x); |
|
|
495 | return (int)r; |
|
|
496 | #else |
|
|
497 | int shift = x & 0xffffffff ? 0 : 32; |
|
|
498 | return ecb_ctz32 (x >> shift) + shift; |
|
|
499 | #endif |
|
|
500 | } |
|
|
501 | |
| 161 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
502 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
| 162 | ecb_function_ int |
503 | ecb_function_ ecb_const int |
| 163 | ecb_popcount32 (uint32_t x) |
504 | ecb_popcount32 (uint32_t x) |
| 164 | { |
505 | { |
| 165 | x -= (x >> 1) & 0x55555555; |
506 | x -= (x >> 1) & 0x55555555; |
| 166 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
507 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
| 167 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
508 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
| 168 | x *= 0x01010101; |
509 | x *= 0x01010101; |
| 169 | |
510 | |
| 170 | return x >> 24; |
511 | return x >> 24; |
| 171 | } |
512 | } |
| 172 | #endif |
|
|
| 173 | |
513 | |
| 174 | #if ECB_GCC_VERSION(4,3) |
514 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
|
|
515 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
|
|
516 | { |
|
|
517 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
|
518 | unsigned long r; |
|
|
519 | _BitScanReverse (&r, x); |
|
|
520 | return (int)r; |
|
|
521 | #else |
|
|
522 | int r = 0; |
|
|
523 | |
|
|
524 | if (x >> 16) { x >>= 16; r += 16; } |
|
|
525 | if (x >> 8) { x >>= 8; r += 8; } |
|
|
526 | if (x >> 4) { x >>= 4; r += 4; } |
|
|
527 | if (x >> 2) { x >>= 2; r += 2; } |
|
|
528 | if (x >> 1) { r += 1; } |
|
|
529 | |
|
|
530 | return r; |
|
|
531 | #endif |
|
|
532 | } |
|
|
533 | |
|
|
534 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
|
|
535 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
|
|
536 | { |
|
|
537 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
538 | unsigned long r; |
|
|
539 | _BitScanReverse64 (&r, x); |
|
|
540 | return (int)r; |
|
|
541 | #else |
|
|
542 | int r = 0; |
|
|
543 | |
|
|
544 | if (x >> 32) { x >>= 32; r += 32; } |
|
|
545 | |
|
|
546 | return r + ecb_ld32 (x); |
|
|
547 | #endif |
|
|
548 | } |
|
|
549 | #endif |
|
|
550 | |
|
|
551 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
|
|
552 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
|
|
553 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
|
|
554 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
|
|
555 | |
|
|
556 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
|
|
557 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
|
|
558 | { |
|
|
559 | return ( (x * 0x0802U & 0x22110U) |
|
|
560 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
|
|
561 | } |
|
|
562 | |
|
|
563 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
|
|
564 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
|
|
565 | { |
|
|
566 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
|
|
567 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
|
|
568 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
|
|
569 | x = ( x >> 8 ) | ( x << 8); |
|
|
570 | |
|
|
571 | return x; |
|
|
572 | } |
|
|
573 | |
|
|
574 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
|
|
575 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
|
|
576 | { |
|
|
577 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
|
|
578 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
|
|
579 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
|
|
580 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
|
|
581 | x = ( x >> 16 ) | ( x << 16); |
|
|
582 | |
|
|
583 | return x; |
|
|
584 | } |
|
|
585 | |
|
|
586 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
|
|
587 | /* so for this version we are lazy */ |
|
|
588 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
|
|
589 | ecb_function_ ecb_const int |
|
|
590 | ecb_popcount64 (uint64_t x) |
|
|
591 | { |
|
|
592 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
|
|
593 | } |
|
|
594 | |
|
|
595 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
|
|
596 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
|
|
597 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
|
|
598 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
|
|
599 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
|
|
600 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
|
|
601 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
|
|
602 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
|
|
603 | |
|
|
604 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
|
|
605 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
|
|
606 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
|
|
607 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
|
|
608 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
|
|
609 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
|
|
610 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
|
|
611 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
|
|
612 | |
|
|
613 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
|
|
614 | #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) |
| 175 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
615 | #define ecb_bswap16(x) __builtin_bswap16 (x) |
|
|
616 | #else |
| 176 | #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
617 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
|
|
618 | #endif |
|
|
619 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
|
|
620 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
|
|
621 | #elif _MSC_VER |
|
|
622 | #include <stdlib.h> |
|
|
623 | #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) |
|
|
624 | #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) |
|
|
625 | #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) |
| 177 | #else |
626 | #else |
|
|
627 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
|
|
628 | ecb_function_ ecb_const uint16_t |
|
|
629 | ecb_bswap16 (uint16_t x) |
|
|
630 | { |
|
|
631 | return ecb_rotl16 (x, 8); |
|
|
632 | } |
|
|
633 | |
| 178 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
634 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
| 179 | ecb_function_ uint32_t |
635 | ecb_function_ ecb_const uint32_t |
| 180 | ecb_bswap32 (uint32_t x) |
636 | ecb_bswap32 (uint32_t x) |
| 181 | { |
637 | { |
| 182 | return (x >> 24) |
638 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
| 183 | | ((x >> 8) & 0x0000ff00) |
|
|
| 184 | | ((x << 8) & 0x00ff0000) |
|
|
| 185 | | (x << 24); |
|
|
| 186 | } |
639 | } |
| 187 | |
640 | |
| 188 | ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
641 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
| 189 | ecb_function_ uint32_t |
642 | ecb_function_ ecb_const uint64_t |
| 190 | ecb_bswap16 (uint32_t x) |
643 | ecb_bswap64 (uint64_t x) |
| 191 | { |
644 | { |
| 192 | return ((x >> 8) & 0xff) |
645 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
| 193 | | ((x << 8) & 0x00ff0000) |
|
|
| 194 | | (x << 24); |
|
|
| 195 | } |
646 | } |
| 196 | #endif |
647 | #endif |
| 197 | |
648 | |
| 198 | #if ECB_GCC_VERSION(4,5) |
649 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
| 199 | #define ecb_unreachable() __builtin_unreachable () |
650 | #define ecb_unreachable() __builtin_unreachable () |
| 200 | #else |
651 | #else |
| 201 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
652 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
| 202 | ecb_function_ void ecb_unreachable (void) ecb_noreturn; |
653 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
| 203 | ecb_function_ void ecb_unreachable (void) { } |
654 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
| 204 | #endif |
655 | #endif |
| 205 | |
656 | |
| 206 | /* try to tell the compiler that some condition is definitely true */ |
657 | /* try to tell the compiler that some condition is definitely true */ |
| 207 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
658 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
| 208 | |
659 | |
| 209 | ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; |
660 | ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); |
| 210 | ecb_function_ unsigned char |
661 | ecb_inline ecb_const uint32_t |
| 211 | ecb_byteorder_helper (void) |
662 | ecb_byteorder_helper (void) |
| 212 | { |
663 | { |
| 213 | const uint32_t u = 0x11223344; |
664 | /* the union code still generates code under pressure in gcc, */ |
| 214 | return *(unsigned char *)&u; |
665 | /* but less than using pointers, and always seems to */ |
|
|
666 | /* successfully return a constant. */ |
|
|
667 | /* the reason why we have this horrible preprocessor mess */ |
|
|
668 | /* is to avoid it in all cases, at least on common architectures */ |
|
|
669 | /* or when using a recent enough gcc version (>= 4.6) */ |
|
|
670 | #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \ |
|
|
671 | || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__) |
|
|
672 | #define ECB_LITTLE_ENDIAN 1 |
|
|
673 | return 0x44332211; |
|
|
674 | #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \ |
|
|
675 | || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__) |
|
|
676 | #define ECB_BIG_ENDIAN 1 |
|
|
677 | return 0x11223344; |
|
|
678 | #else |
|
|
679 | union |
|
|
680 | { |
|
|
681 | uint8_t c[4]; |
|
|
682 | uint32_t u; |
|
|
683 | } u = { 0x11, 0x22, 0x33, 0x44 }; |
|
|
684 | return u.u; |
|
|
685 | #endif |
| 215 | } |
686 | } |
| 216 | |
687 | |
| 217 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
688 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
| 218 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
689 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } |
| 219 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
690 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
| 220 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
691 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } |
|
|
692 | |
|
|
693 | /*****************************************************************************/ |
|
|
694 | /* unaligned load/store */ |
|
|
695 | |
|
|
696 | ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } |
|
|
697 | ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } |
|
|
698 | ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } |
|
|
699 | |
|
|
700 | ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } |
|
|
701 | ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } |
|
|
702 | ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } |
|
|
703 | |
|
|
704 | ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
705 | ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
706 | ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
707 | |
|
|
708 | ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); } |
|
|
709 | ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); } |
|
|
710 | ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); } |
|
|
711 | |
|
|
712 | ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); } |
|
|
713 | ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); } |
|
|
714 | ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); } |
|
|
715 | |
|
|
716 | ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } |
|
|
717 | ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } |
|
|
718 | ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } |
|
|
719 | |
|
|
720 | ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } |
|
|
721 | ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } |
|
|
722 | ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } |
|
|
723 | |
|
|
724 | ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
725 | ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
726 | ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
727 | |
|
|
728 | ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); } |
|
|
729 | ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); } |
|
|
730 | ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); } |
|
|
731 | |
|
|
732 | ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); } |
|
|
733 | ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); } |
|
|
734 | ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); } |
|
|
735 | |
|
|
736 | #ifdef ECB_CPP |
|
|
737 | |
|
|
738 | inline uint8_t ecb_bswap (uint8_t v) { return v; } |
|
|
739 | inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); } |
|
|
740 | inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); } |
|
|
741 | inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); } |
|
|
742 | |
|
|
743 | template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } |
|
|
744 | template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } |
|
|
745 | template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; } |
|
|
746 | template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); } |
|
|
747 | template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); } |
|
|
748 | template<typename T> inline T ecb_peek_u (const void *ptr) { T v; std::memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
749 | template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); } |
|
|
750 | template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); } |
|
|
751 | |
|
|
752 | template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } |
|
|
753 | template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } |
|
|
754 | template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; } |
|
|
755 | template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); } |
|
|
756 | template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); } |
|
|
757 | template<typename T> inline void ecb_poke_u (void *ptr, T v) { std::memcpy (ptr, &v, sizeof (v)); } |
|
|
758 | template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); } |
|
|
759 | template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); } |
|
|
760 | |
|
|
761 | #endif |
|
|
762 | |
|
|
763 | /*****************************************************************************/ |
| 221 | |
764 | |
| 222 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
765 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
| 223 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
766 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
| 224 | #else |
767 | #else |
| 225 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
768 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
|
|
769 | #endif |
|
|
770 | |
|
|
771 | #if ECB_CPP |
|
|
772 | template<typename T> |
|
|
773 | static inline T ecb_div_rd (T val, T div) |
|
|
774 | { |
|
|
775 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
|
|
776 | } |
|
|
777 | template<typename T> |
|
|
778 | static inline T ecb_div_ru (T val, T div) |
|
|
779 | { |
|
|
780 | return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; |
|
|
781 | } |
|
|
782 | #else |
|
|
783 | #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
|
|
784 | #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
| 226 | #endif |
785 | #endif |
| 227 | |
786 | |
| 228 | #if ecb_cplusplus_does_not_suck |
787 | #if ecb_cplusplus_does_not_suck |
| 229 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
788 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
| 230 | template<typename T, int N> |
789 | template<typename T, int N> |
| … | |
… | |
| 234 | } |
793 | } |
| 235 | #else |
794 | #else |
| 236 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
795 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
| 237 | #endif |
796 | #endif |
| 238 | |
797 | |
| 239 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
798 | /*****************************************************************************/ |
| 240 | ecb_inline uint32_t |
799 | |
| 241 | ecb_rotr32 (uint32_t x, unsigned int count) |
800 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
|
|
801 | ecb_function_ ecb_const uint32_t |
|
|
802 | ecb_binary16_to_binary32 (uint32_t x) |
| 242 | { |
803 | { |
| 243 | return (x << (32 - count)) | (x >> count); |
804 | unsigned int s = (x & 0x8000) << (31 - 15); |
|
|
805 | int e = (x >> 10) & 0x001f; |
|
|
806 | unsigned int m = x & 0x03ff; |
|
|
807 | |
|
|
808 | if (ecb_expect_false (e == 31)) |
|
|
809 | /* infinity or NaN */ |
|
|
810 | e = 255 - (127 - 15); |
|
|
811 | else if (ecb_expect_false (!e)) |
|
|
812 | { |
|
|
813 | if (ecb_expect_true (!m)) |
|
|
814 | /* zero, handled by code below by forcing e to 0 */ |
|
|
815 | e = 0 - (127 - 15); |
|
|
816 | else |
|
|
817 | { |
|
|
818 | /* subnormal, renormalise */ |
|
|
819 | unsigned int s = 10 - ecb_ld32 (m); |
|
|
820 | |
|
|
821 | m = (m << s) & 0x3ff; /* mask implicit bit */ |
|
|
822 | e -= s - 1; |
|
|
823 | } |
|
|
824 | } |
|
|
825 | |
|
|
826 | /* e and m now are normalised, or zero, (or inf or nan) */ |
|
|
827 | e += 127 - 15; |
|
|
828 | |
|
|
829 | return s | (e << 23) | (m << (23 - 10)); |
| 244 | } |
830 | } |
| 245 | |
831 | |
| 246 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
832 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
| 247 | ecb_inline uint32_t |
833 | ecb_function_ ecb_const uint16_t |
| 248 | ecb_rotl32 (uint32_t x, unsigned int count) |
834 | ecb_binary32_to_binary16 (uint32_t x) |
| 249 | { |
835 | { |
| 250 | return (x >> (32 - count)) | (x << count); |
836 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
|
|
837 | unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
|
|
838 | unsigned int m = x & 0x007fffff; |
|
|
839 | |
|
|
840 | x &= 0x7fffffff; |
|
|
841 | |
|
|
842 | /* if it's within range of binary16 normals, use fast path */ |
|
|
843 | if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) |
|
|
844 | { |
|
|
845 | /* mantissa round-to-even */ |
|
|
846 | m += 0x00000fff + ((m >> (23 - 10)) & 1); |
|
|
847 | |
|
|
848 | /* handle overflow */ |
|
|
849 | if (ecb_expect_false (m >= 0x00800000)) |
|
|
850 | { |
|
|
851 | m >>= 1; |
|
|
852 | e += 1; |
|
|
853 | } |
|
|
854 | |
|
|
855 | return s | (e << 10) | (m >> (23 - 10)); |
|
|
856 | } |
|
|
857 | |
|
|
858 | /* handle large numbers and infinity */ |
|
|
859 | if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) |
|
|
860 | return s | 0x7c00; |
|
|
861 | |
|
|
862 | /* handle zero, subnormals and small numbers */ |
|
|
863 | if (ecb_expect_true (x < 0x38800000)) |
|
|
864 | { |
|
|
865 | /* zero */ |
|
|
866 | if (ecb_expect_true (!x)) |
|
|
867 | return s; |
|
|
868 | |
|
|
869 | /* handle subnormals */ |
|
|
870 | |
|
|
871 | /* too small, will be zero */ |
|
|
872 | if (e < (14 - 24)) /* might not be sharp, but is good enough */ |
|
|
873 | return s; |
|
|
874 | |
|
|
875 | m |= 0x00800000; /* make implicit bit explicit */ |
|
|
876 | |
|
|
877 | /* very tricky - we need to round to the nearest e (+10) bit value */ |
|
|
878 | { |
|
|
879 | unsigned int bits = 14 - e; |
|
|
880 | unsigned int half = (1 << (bits - 1)) - 1; |
|
|
881 | unsigned int even = (m >> bits) & 1; |
|
|
882 | |
|
|
883 | /* if this overflows, we will end up with a normalised number */ |
|
|
884 | m = (m + half + even) >> bits; |
|
|
885 | } |
|
|
886 | |
|
|
887 | return s | m; |
|
|
888 | } |
|
|
889 | |
|
|
890 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
|
|
891 | m >>= 13; |
|
|
892 | |
|
|
893 | return s | 0x7c00 | m | !m; |
| 251 | } |
894 | } |
| 252 | |
895 | |
|
|
896 | /*******************************************************************************/ |
|
|
897 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
|
|
898 | |
|
|
899 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
|
|
900 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
|
|
901 | #if 0 \ |
|
|
902 | || __i386 || __i386__ \ |
|
|
903 | || ECB_GCC_AMD64 \ |
|
|
904 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
|
|
905 | || defined __s390__ || defined __s390x__ \ |
|
|
906 | || defined __mips__ \ |
|
|
907 | || defined __alpha__ \ |
|
|
908 | || defined __hppa__ \ |
|
|
909 | || defined __ia64__ \ |
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910 | || defined __m68k__ \ |
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911 | || defined __m88k__ \ |
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912 | || defined __sh__ \ |
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913 | || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ |
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914 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
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915 | || defined __aarch64__ |
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916 | #define ECB_STDFP 1 |
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917 | #include <string.h> /* for memcpy */ |
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918 | #else |
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919 | #define ECB_STDFP 0 |
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920 | #endif |
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921 | |
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922 | #ifndef ECB_NO_LIBM |
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923 | |
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924 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
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925 | |
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926 | /* only the oldest of old doesn't have this one. solaris. */ |
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927 | #ifdef INFINITY |
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928 | #define ECB_INFINITY INFINITY |
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929 | #else |
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930 | #define ECB_INFINITY HUGE_VAL |
| 253 | #endif |
931 | #endif |
| 254 | |
932 | |
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933 | #ifdef NAN |
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934 | #define ECB_NAN NAN |
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935 | #else |
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936 | #define ECB_NAN ECB_INFINITY |
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937 | #endif |
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938 | |
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939 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
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940 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
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941 | #define ecb_frexpf(x,e) frexpf ((x), (e)) |
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942 | #else |
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943 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
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944 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
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945 | #endif |
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946 | |
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947 | /* convert a float to ieee single/binary32 */ |
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948 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
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949 | ecb_function_ ecb_const uint32_t |
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950 | ecb_float_to_binary32 (float x) |
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951 | { |
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952 | uint32_t r; |
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953 | |
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954 | #if ECB_STDFP |
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955 | memcpy (&r, &x, 4); |
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956 | #else |
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957 | /* slow emulation, works for anything but -0 */ |
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958 | uint32_t m; |
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959 | int e; |
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960 | |
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961 | if (x == 0e0f ) return 0x00000000U; |
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962 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
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963 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
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964 | if (x != x ) return 0x7fbfffffU; |
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965 | |
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966 | m = ecb_frexpf (x, &e) * 0x1000000U; |
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967 | |
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968 | r = m & 0x80000000U; |
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969 | |
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970 | if (r) |
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971 | m = -m; |
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972 | |
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973 | if (e <= -126) |
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974 | { |
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975 | m &= 0xffffffU; |
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976 | m >>= (-125 - e); |
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977 | e = -126; |
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978 | } |
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979 | |
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980 | r |= (e + 126) << 23; |
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981 | r |= m & 0x7fffffU; |
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982 | #endif |
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983 | |
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984 | return r; |
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985 | } |
|
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986 | |
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987 | /* converts an ieee single/binary32 to a float */ |
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988 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
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989 | ecb_function_ ecb_const float |
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990 | ecb_binary32_to_float (uint32_t x) |
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991 | { |
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992 | float r; |
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993 | |
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994 | #if ECB_STDFP |
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995 | memcpy (&r, &x, 4); |
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996 | #else |
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997 | /* emulation, only works for normals and subnormals and +0 */ |
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998 | int neg = x >> 31; |
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999 | int e = (x >> 23) & 0xffU; |
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1000 | |
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1001 | x &= 0x7fffffU; |
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1002 | |
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1003 | if (e) |
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1004 | x |= 0x800000U; |
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1005 | else |
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1006 | e = 1; |
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1007 | |
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1008 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
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1009 | r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); |
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1010 | |
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1011 | r = neg ? -r : r; |
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1012 | #endif |
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1013 | |
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1014 | return r; |
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1015 | } |
|
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1016 | |
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1017 | /* convert a double to ieee double/binary64 */ |
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1018 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
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1019 | ecb_function_ ecb_const uint64_t |
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1020 | ecb_double_to_binary64 (double x) |
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1021 | { |
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1022 | uint64_t r; |
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1023 | |
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1024 | #if ECB_STDFP |
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1025 | memcpy (&r, &x, 8); |
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1026 | #else |
|
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1027 | /* slow emulation, works for anything but -0 */ |
|
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1028 | uint64_t m; |
|
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1029 | int e; |
|
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1030 | |
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1031 | if (x == 0e0 ) return 0x0000000000000000U; |
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1032 | if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; |
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1033 | if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; |
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1034 | if (x != x ) return 0X7ff7ffffffffffffU; |
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1035 | |
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1036 | m = frexp (x, &e) * 0x20000000000000U; |
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1037 | |
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1038 | r = m & 0x8000000000000000;; |
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1039 | |
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1040 | if (r) |
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1041 | m = -m; |
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1042 | |
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1043 | if (e <= -1022) |
|
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1044 | { |
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1045 | m &= 0x1fffffffffffffU; |
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1046 | m >>= (-1021 - e); |
|
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1047 | e = -1022; |
|
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1048 | } |
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1049 | |
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1050 | r |= ((uint64_t)(e + 1022)) << 52; |
|
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1051 | r |= m & 0xfffffffffffffU; |
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1052 | #endif |
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1053 | |
|
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1054 | return r; |
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1055 | } |
|
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1056 | |
|
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1057 | /* converts an ieee double/binary64 to a double */ |
|
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1058 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
|
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1059 | ecb_function_ ecb_const double |
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1060 | ecb_binary64_to_double (uint64_t x) |
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1061 | { |
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1062 | double r; |
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1063 | |
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1064 | #if ECB_STDFP |
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1065 | memcpy (&r, &x, 8); |
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1066 | #else |
|
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1067 | /* emulation, only works for normals and subnormals and +0 */ |
|
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1068 | int neg = x >> 63; |
|
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1069 | int e = (x >> 52) & 0x7ffU; |
|
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1070 | |
|
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1071 | x &= 0xfffffffffffffU; |
|
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1072 | |
|
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1073 | if (e) |
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1074 | x |= 0x10000000000000U; |
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1075 | else |
|
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1076 | e = 1; |
|
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1077 | |
|
|
1078 | /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ |
|
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1079 | r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); |
|
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1080 | |
|
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1081 | r = neg ? -r : r; |
|
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1082 | #endif |
|
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1083 | |
|
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1084 | return r; |
|
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1085 | } |
|
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1086 | |
|
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1087 | /* convert a float to ieee half/binary16 */ |
|
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1088 | ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); |
|
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1089 | ecb_function_ ecb_const uint16_t |
|
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1090 | ecb_float_to_binary16 (float x) |
|
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1091 | { |
|
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1092 | return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); |
|
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1093 | } |
|
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1094 | |
|
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1095 | /* convert an ieee half/binary16 to float */ |
|
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1096 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
|
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1097 | ecb_function_ ecb_const float |
|
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1098 | ecb_binary16_to_float (uint16_t x) |
|
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1099 | { |
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1100 | return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); |
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1101 | } |
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1102 | |
|
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1103 | #endif |
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1104 | |
|
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1105 | #endif |
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1106 | |
