| 1 | /* |
1 | /* |
| 2 | * libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
| 3 | * |
3 | * |
| 4 | * Copyright (©) 2009-2011 Marc Alexander Lehmann |
4 | * Copyright (©) 2009-2015,2018-2021 Marc Alexander Lehmann <libecb@schmorp.de> |
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5 | * Copyright (©) 2011 Emanuele Giaquinta |
| 5 | * All rights reserved. |
6 | * All rights reserved. |
| 6 | * |
7 | * |
| 7 | * 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- |
| 8 | * tion, are permitted provided that the following conditions are met: |
9 | * tion, are permitted provided that the following conditions are met: |
| 9 | * |
10 | * |
| … | |
… | |
| 22 | * 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; |
| 23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
| 25 | * 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 |
| 26 | * 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. |
| 27 | */ |
39 | */ |
| 28 | |
40 | |
| 29 | #ifndef ECB_H |
41 | #ifndef ECB_H |
| 30 | #define ECB_H |
42 | #define ECB_H |
| 31 | |
43 | |
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44 | /* 16 bits major, 16 bits minor */ |
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45 | #define ECB_VERSION 0x00010009 |
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46 | |
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47 | #include <string.h> /* for memcpy */ |
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48 | |
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49 | #if defined (_WIN32) && !defined (__MINGW32__) |
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50 | typedef signed char int8_t; |
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51 | typedef unsigned char uint8_t; |
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52 | typedef signed char int_fast8_t; |
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53 | typedef unsigned char uint_fast8_t; |
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54 | typedef signed short int16_t; |
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55 | typedef unsigned short uint16_t; |
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56 | typedef signed int int_fast16_t; |
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57 | typedef unsigned int uint_fast16_t; |
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58 | typedef signed int int32_t; |
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59 | typedef unsigned int uint32_t; |
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60 | typedef signed int int_fast32_t; |
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61 | typedef unsigned int uint_fast32_t; |
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62 | #if __GNUC__ |
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63 | typedef signed long long int64_t; |
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64 | typedef unsigned long long uint64_t; |
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65 | #else /* _MSC_VER || __BORLANDC__ */ |
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66 | typedef signed __int64 int64_t; |
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67 | typedef unsigned __int64 uint64_t; |
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68 | #endif |
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69 | typedef int64_t int_fast64_t; |
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70 | typedef uint64_t uint_fast64_t; |
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71 | #ifdef _WIN64 |
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72 | #define ECB_PTRSIZE 8 |
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73 | typedef uint64_t uintptr_t; |
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74 | typedef int64_t intptr_t; |
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75 | #else |
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76 | #define ECB_PTRSIZE 4 |
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77 | typedef uint32_t uintptr_t; |
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78 | typedef int32_t intptr_t; |
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79 | #endif |
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80 | #else |
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81 | #include <inttypes.h> |
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82 | #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU |
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83 | #define ECB_PTRSIZE 8 |
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84 | #else |
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85 | #define ECB_PTRSIZE 4 |
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86 | #endif |
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87 | #endif |
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88 | |
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89 | #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) |
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90 | #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) |
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91 | |
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92 | #ifndef ECB_OPTIMIZE_SIZE |
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93 | #if __OPTIMIZE_SIZE__ |
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94 | #define ECB_OPTIMIZE_SIZE 1 |
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95 | #else |
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96 | #define ECB_OPTIMIZE_SIZE 0 |
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97 | #endif |
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98 | #endif |
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99 | |
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100 | /* work around x32 idiocy by defining proper macros */ |
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101 | #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
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102 | #if _ILP32 |
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103 | #define ECB_AMD64_X32 1 |
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104 | #else |
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105 | #define ECB_AMD64 1 |
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106 | #endif |
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107 | #endif |
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108 | |
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109 | #if ECB_PTRSIZE >= 8 || ECB_AMD64_X32 |
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110 | #define ECB_64BIT_NATIVE 1 |
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111 | #else |
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112 | #define ECB_64BIT_NATIVE 0 |
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113 | #endif |
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114 | |
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115 | /* many compilers define _GNUC_ to some versions but then only implement |
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116 | * what their idiot authors think are the "more important" extensions, |
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117 | * causing enormous grief in return for some better fake benchmark numbers. |
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118 | * or so. |
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119 | * we try to detect these and simply assume they are not gcc - if they have |
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120 | * an issue with that they should have done it right in the first place. |
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121 | */ |
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122 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
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123 | #define ECB_GCC_VERSION(major,minor) 0 |
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124 | #else |
| 32 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
125 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
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126 | #endif |
| 33 | |
127 | |
| 34 | #define ECB_HEADER_INLINE static inline |
128 | #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) |
| 35 | |
129 | |
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130 | #if __clang__ && defined __has_builtin |
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131 | #define ECB_CLANG_BUILTIN(x) __has_builtin (x) |
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132 | #else |
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133 | #define ECB_CLANG_BUILTIN(x) 0 |
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134 | #endif |
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135 | |
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136 | #if __clang__ && defined __has_extension |
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137 | #define ECB_CLANG_EXTENSION(x) __has_extension (x) |
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138 | #else |
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139 | #define ECB_CLANG_EXTENSION(x) 0 |
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140 | #endif |
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141 | |
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142 | #define ECB_CPP (__cplusplus+0) |
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143 | #define ECB_CPP11 (__cplusplus >= 201103L) |
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144 | #define ECB_CPP14 (__cplusplus >= 201402L) |
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145 | #define ECB_CPP17 (__cplusplus >= 201703L) |
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146 | |
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147 | #if ECB_CPP |
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148 | #define ECB_C 0 |
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149 | #define ECB_STDC_VERSION 0 |
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150 | #else |
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151 | #define ECB_C 1 |
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152 | #define ECB_STDC_VERSION __STDC_VERSION__ |
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153 | #endif |
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154 | |
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155 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
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156 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
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157 | #define ECB_C17 (ECB_STDC_VERSION >= 201710L) |
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158 | |
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159 | #if ECB_CPP |
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160 | #define ECB_EXTERN_C extern "C" |
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161 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
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162 | #define ECB_EXTERN_C_END } |
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163 | #else |
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164 | #define ECB_EXTERN_C extern |
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165 | #define ECB_EXTERN_C_BEG |
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166 | #define ECB_EXTERN_C_END |
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167 | #endif |
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168 | |
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169 | /*****************************************************************************/ |
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170 | |
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171 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
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172 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
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173 | |
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174 | #if ECB_NO_THREADS |
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175 | #define ECB_NO_SMP 1 |
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176 | #endif |
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177 | |
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178 | #if ECB_NO_SMP |
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179 | #define ECB_MEMORY_FENCE do { } while (0) |
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180 | #endif |
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181 | |
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182 | /* 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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183 | #if __xlC__ && ECB_CPP |
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184 | #include <builtins.h> |
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185 | #endif |
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186 | |
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187 | #if 1400 <= _MSC_VER |
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188 | #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ |
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189 | #endif |
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190 | |
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191 | #ifndef ECB_MEMORY_FENCE |
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192 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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193 | #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory") |
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194 | #if __i386 || __i386__ |
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195 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
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196 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
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197 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") |
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198 | #elif ECB_GCC_AMD64 |
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199 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
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200 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
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201 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory") |
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202 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
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203 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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204 | #elif defined __ARM_ARCH_2__ \ |
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205 | || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \ |
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206 | || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \ |
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207 | || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \ |
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208 | || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \ |
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209 | || defined __ARM_ARCH_5TEJ__ |
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210 | /* should not need any, unless running old code on newer cpu - arm doesn't support that */ |
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211 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
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212 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \ |
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213 | || defined __ARM_ARCH_6T2__ |
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214 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
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215 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
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216 | || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ |
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217 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
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218 | #elif __aarch64__ |
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219 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
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220 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
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221 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
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222 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
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223 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
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224 | #elif defined __s390__ || defined __s390x__ |
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225 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
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226 | #elif defined __mips__ |
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227 | /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
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228 | /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ |
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229 | #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
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230 | #elif defined __alpha__ |
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231 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
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232 | #elif defined __hppa__ |
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233 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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234 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
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235 | #elif defined __ia64__ |
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236 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
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237 | #elif defined __m68k__ |
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238 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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239 | #elif defined __m88k__ |
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240 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
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241 | #elif defined __sh__ |
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242 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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243 | #endif |
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244 | #endif |
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245 | #endif |
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246 | |
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247 | #ifndef ECB_MEMORY_FENCE |
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248 | #if ECB_GCC_VERSION(4,7) |
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249 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
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250 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
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251 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
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252 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
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253 | #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED) |
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254 | |
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255 | #elif ECB_CLANG_EXTENSION(c_atomic) |
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256 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
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257 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
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258 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
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259 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
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260 | #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED) |
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261 | |
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262 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
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263 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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264 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
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265 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
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266 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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267 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
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268 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
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269 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
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270 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
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271 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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272 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
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273 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
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274 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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275 | #elif defined _WIN32 |
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276 | #include <WinNT.h> |
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277 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
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278 | #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
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279 | #include <mbarrier.h> |
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280 | #define ECB_MEMORY_FENCE __machine_rw_barrier () |
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281 | #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier () |
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282 | #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier () |
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283 | #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier () |
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284 | #elif __xlC__ |
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285 | #define ECB_MEMORY_FENCE __sync () |
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286 | #endif |
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287 | #endif |
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288 | |
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289 | #ifndef ECB_MEMORY_FENCE |
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290 | #if ECB_C11 && !defined __STDC_NO_ATOMICS__ |
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291 | /* we assume that these memory fences work on all variables/all memory accesses, */ |
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292 | /* not just C11 atomics and atomic accesses */ |
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293 | #include <stdatomic.h> |
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294 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
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295 | #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire) |
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296 | #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release) |
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297 | #endif |
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298 | #endif |
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299 | |
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300 | #ifndef ECB_MEMORY_FENCE |
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301 | #if !ECB_AVOID_PTHREADS |
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302 | /* |
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303 | * if you get undefined symbol references to pthread_mutex_lock, |
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304 | * or failure to find pthread.h, then you should implement |
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305 | * the ECB_MEMORY_FENCE operations for your cpu/compiler |
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306 | * OR provide pthread.h and link against the posix thread library |
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307 | * of your system. |
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308 | */ |
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309 | #include <pthread.h> |
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310 | #define ECB_NEEDS_PTHREADS 1 |
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311 | #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
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312 | |
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313 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
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314 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
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315 | #endif |
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316 | #endif |
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317 | |
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318 | #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE |
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319 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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320 | #endif |
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321 | |
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322 | #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE |
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323 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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324 | #endif |
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325 | |
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326 | #if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE |
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327 | #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */ |
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328 | #endif |
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329 | |
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330 | /*****************************************************************************/ |
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331 | |
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332 | #if ECB_CPP |
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333 | #define ecb_inline static inline |
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334 | #elif ECB_GCC_VERSION(2,5) |
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335 | #define ecb_inline static __inline__ |
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336 | #elif ECB_C99 |
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337 | #define ecb_inline static inline |
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338 | #else |
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339 | #define ecb_inline static |
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340 | #endif |
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341 | |
| 36 | #if ECB_GCC_VERSION(3,1) |
342 | #if ECB_GCC_VERSION(3,3) |
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343 | #define ecb_restrict __restrict__ |
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344 | #elif ECB_C99 |
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345 | #define ecb_restrict restrict |
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346 | #else |
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347 | #define ecb_restrict |
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348 | #endif |
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349 | |
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350 | typedef int ecb_bool; |
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351 | |
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352 | #define ECB_CONCAT_(a, b) a ## b |
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353 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
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354 | #define ECB_STRINGIFY_(a) # a |
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355 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
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356 | #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) |
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357 | |
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358 | #define ecb_function_ ecb_inline |
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359 | |
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360 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
| 37 | # define ecb_attribute(attrlist) __attribute__(attrlist) |
361 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
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362 | #else |
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363 | #define ecb_attribute(attrlist) |
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364 | #endif |
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365 | |
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366 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) |
| 38 | # define ecb_is_constant(c) __builtin_constant_p (c) |
367 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
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368 | #else |
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369 | /* possible C11 impl for integral types |
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370 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
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371 | #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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372 | |
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373 | #define ecb_is_constant(expr) 0 |
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374 | #endif |
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375 | |
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376 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) |
| 39 | # define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
377 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
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378 | #else |
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379 | #define ecb_expect(expr,value) (expr) |
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380 | #endif |
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381 | |
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382 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) |
| 40 | # define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
383 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
| 41 | #else |
384 | #else |
| 42 | # define ecb_attribute(attrlist) |
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| 43 | # define ecb_is_constant(c) 0 |
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| 44 | # define ecb_expect(expr,value) (expr) |
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| 45 | # define ecb_prefetch(addr,rw,locality) |
385 | #define ecb_prefetch(addr,rw,locality) |
| 46 | #endif |
386 | #endif |
| 47 | |
387 | |
| 48 | /* no emulation for ecb_decltype */ |
388 | /* no emulation for ecb_decltype */ |
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389 | #if ECB_CPP11 |
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390 | // older implementations might have problems with decltype(x)::type, work around it |
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391 | template<class T> struct ecb_decltype_t { typedef T type; }; |
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392 | #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type |
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393 | #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) |
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394 | #define ecb_decltype(x) __typeof__ (x) |
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395 | #endif |
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396 | |
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397 | #if _MSC_VER >= 1300 |
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398 | #define ecb_deprecated __declspec (deprecated) |
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399 | #else |
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400 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
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401 | #endif |
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402 | |
|
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403 | #if _MSC_VER >= 1500 |
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404 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
| 49 | #if ECB_GCC_VERSION(4,5) |
405 | #elif ECB_GCC_VERSION(4,5) |
| 50 | # define ecb_decltype(x) __decltype(x) |
406 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
| 51 | #elif ECB_GCC_VERSION(3,0) |
407 | #else |
| 52 | # define ecb_decltype(x) typeof(x) |
408 | #define ecb_deprecated_message(msg) ecb_deprecated |
| 53 | #endif |
409 | #endif |
| 54 | |
410 | |
|
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411 | #if _MSC_VER >= 1400 |
|
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412 | #define ecb_noinline __declspec (noinline) |
|
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413 | #else |
| 55 | #define ecb_noinline ecb_attribute ((noinline)) |
414 | #define ecb_noinline ecb_attribute ((__noinline__)) |
| 56 | #define ecb_noreturn ecb_attribute ((noreturn)) |
415 | #endif |
|
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416 | |
| 57 | #define ecb_unused ecb_attribute ((unused)) |
417 | #define ecb_unused ecb_attribute ((__unused__)) |
| 58 | #define ecb_const ecb_attribute ((const)) |
418 | #define ecb_const ecb_attribute ((__const__)) |
| 59 | #define ecb_pure ecb_attribute ((pure)) |
419 | #define ecb_pure ecb_attribute ((__pure__)) |
| 60 | #define ecb_hot ecb_attribute ((hot)) // 4.3 |
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| 61 | #define ecb_cold ecb_attribute ((cold)) // 4.3 |
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| 62 | |
420 | |
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421 | #if ECB_C11 || __IBMC_NORETURN |
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422 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ |
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423 | #define ecb_noreturn _Noreturn |
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424 | #elif ECB_CPP11 |
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425 | #define ecb_noreturn [[noreturn]] |
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426 | #elif _MSC_VER >= 1200 |
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427 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ |
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428 | #define ecb_noreturn __declspec (noreturn) |
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429 | #else |
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430 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
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431 | #endif |
|
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432 | |
| 63 | #if ECB_GCC_VERSION(4,5) |
433 | #if ECB_GCC_VERSION(4,3) |
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434 | #define ecb_artificial ecb_attribute ((__artificial__)) |
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435 | #define ecb_hot ecb_attribute ((__hot__)) |
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436 | #define ecb_cold ecb_attribute ((__cold__)) |
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437 | #else |
|
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438 | #define ecb_artificial |
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439 | #define ecb_hot |
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440 | #define ecb_cold |
|
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441 | #endif |
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442 | |
|
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443 | /* put around conditional expressions if you are very sure that the */ |
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444 | /* expression is mostly true or mostly false. note that these return */ |
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445 | /* booleans, not the expression. */ |
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446 | #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
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447 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
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448 | /* for compatibility to the rest of the world */ |
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449 | #define ecb_likely(expr) ecb_expect_true (expr) |
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450 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
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451 | |
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452 | /* count trailing zero bits and count # of one bits */ |
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453 | #if ECB_GCC_VERSION(3,4) \ |
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454 | || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ |
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455 | && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ |
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456 | && ECB_CLANG_BUILTIN(__builtin_popcount)) |
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457 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
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458 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
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459 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
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460 | #define ecb_ctz32(x) __builtin_ctz (x) |
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461 | #define ecb_ctz64(x) __builtin_ctzll (x) |
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462 | #define ecb_popcount32(x) __builtin_popcount (x) |
|
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463 | /* no popcountll */ |
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464 | #else |
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465 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
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466 | ecb_function_ ecb_const int |
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467 | ecb_ctz32 (uint32_t x) |
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468 | { |
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469 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
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470 | unsigned long r; |
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471 | _BitScanForward (&r, x); |
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472 | return (int)r; |
|
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473 | #else |
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474 | int r = 0; |
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475 | |
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476 | x &= ~x + 1; /* this isolates the lowest bit */ |
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477 | |
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478 | #if ECB_branchless_on_i386 |
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479 | r += !!(x & 0xaaaaaaaa) << 0; |
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480 | r += !!(x & 0xcccccccc) << 1; |
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481 | r += !!(x & 0xf0f0f0f0) << 2; |
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482 | r += !!(x & 0xff00ff00) << 3; |
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483 | r += !!(x & 0xffff0000) << 4; |
|
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484 | #else |
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485 | if (x & 0xaaaaaaaa) r += 1; |
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486 | if (x & 0xcccccccc) r += 2; |
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487 | if (x & 0xf0f0f0f0) r += 4; |
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488 | if (x & 0xff00ff00) r += 8; |
|
|
489 | if (x & 0xffff0000) r += 16; |
|
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490 | #endif |
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491 | |
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492 | return r; |
|
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493 | #endif |
|
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494 | } |
|
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495 | |
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496 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
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497 | ecb_function_ ecb_const int |
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498 | ecb_ctz64 (uint64_t x) |
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499 | { |
|
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500 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
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501 | unsigned long r; |
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502 | _BitScanForward64 (&r, x); |
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503 | return (int)r; |
|
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504 | #else |
|
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505 | int shift = x & 0xffffffff ? 0 : 32; |
|
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506 | return ecb_ctz32 (x >> shift) + shift; |
|
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507 | #endif |
|
|
508 | } |
|
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509 | |
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510 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
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511 | ecb_function_ ecb_const int |
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512 | ecb_popcount32 (uint32_t x) |
|
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513 | { |
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514 | x -= (x >> 1) & 0x55555555; |
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515 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
|
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516 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
|
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517 | x *= 0x01010101; |
|
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518 | |
|
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519 | return x >> 24; |
|
|
520 | } |
|
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521 | |
|
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522 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
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523 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
|
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524 | { |
|
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525 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
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526 | unsigned long r; |
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527 | _BitScanReverse (&r, x); |
|
|
528 | return (int)r; |
|
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529 | #else |
|
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530 | int r = 0; |
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531 | |
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532 | if (x >> 16) { x >>= 16; r += 16; } |
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533 | if (x >> 8) { x >>= 8; r += 8; } |
|
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534 | if (x >> 4) { x >>= 4; r += 4; } |
|
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535 | if (x >> 2) { x >>= 2; r += 2; } |
|
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536 | if (x >> 1) { r += 1; } |
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537 | |
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538 | return r; |
|
|
539 | #endif |
|
|
540 | } |
|
|
541 | |
|
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542 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
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543 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
|
|
544 | { |
|
|
545 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
546 | unsigned long r; |
|
|
547 | _BitScanReverse64 (&r, x); |
|
|
548 | return (int)r; |
|
|
549 | #else |
|
|
550 | int r = 0; |
|
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551 | |
|
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552 | if (x >> 32) { x >>= 32; r += 32; } |
|
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553 | |
|
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554 | return r + ecb_ld32 (x); |
|
|
555 | #endif |
|
|
556 | } |
|
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557 | #endif |
|
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558 | |
|
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559 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
|
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560 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
|
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561 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
|
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562 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
|
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563 | |
|
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564 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
|
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565 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
|
|
566 | { |
|
|
567 | return ( (x * 0x0802U & 0x22110U) |
|
|
568 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
|
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569 | } |
|
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570 | |
|
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571 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
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572 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
|
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573 | { |
|
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574 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
|
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575 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
|
|
576 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
|
|
577 | x = ( x >> 8 ) | ( x << 8); |
|
|
578 | |
|
|
579 | return x; |
|
|
580 | } |
|
|
581 | |
|
|
582 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
|
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583 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
|
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584 | { |
|
|
585 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
|
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586 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
|
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587 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
|
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588 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
|
|
589 | x = ( x >> 16 ) | ( x << 16); |
|
|
590 | |
|
|
591 | return x; |
|
|
592 | } |
|
|
593 | |
|
|
594 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
|
|
595 | /* so for this version we are lazy */ |
|
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596 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
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597 | ecb_function_ ecb_const int |
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598 | ecb_popcount64 (uint64_t x) |
|
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599 | { |
|
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600 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
|
|
601 | } |
|
|
602 | |
|
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603 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
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604 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
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605 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
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606 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
|
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607 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
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608 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
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609 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
|
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610 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
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611 | |
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612 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
|
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613 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
|
|
614 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
|
|
615 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
|
|
616 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
|
|
617 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
|
|
618 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
|
|
619 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
|
|
620 | |
|
|
621 | #if ECB_CPP |
|
|
622 | |
|
|
623 | inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); } |
|
|
624 | inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); } |
|
|
625 | inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); } |
|
|
626 | inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); } |
|
|
627 | |
|
|
628 | inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); } |
|
|
629 | inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); } |
|
|
630 | inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); } |
|
|
631 | inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); } |
|
|
632 | |
|
|
633 | inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); } |
|
|
634 | inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); } |
|
|
635 | inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); } |
|
|
636 | inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); } |
|
|
637 | |
|
|
638 | inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); } |
|
|
639 | inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); } |
|
|
640 | inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); } |
|
|
641 | inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); } |
|
|
642 | |
|
|
643 | inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); } |
|
|
644 | inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); } |
|
|
645 | inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); } |
|
|
646 | |
|
|
647 | inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); } |
|
|
648 | inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); } |
|
|
649 | inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); } |
|
|
650 | inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); } |
|
|
651 | |
|
|
652 | inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); } |
|
|
653 | inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); } |
|
|
654 | inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); } |
|
|
655 | inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); } |
|
|
656 | |
|
|
657 | #endif |
|
|
658 | |
|
|
659 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
|
|
660 | #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) |
|
|
661 | #define ecb_bswap16(x) __builtin_bswap16 (x) |
|
|
662 | #else |
|
|
663 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
|
|
664 | #endif |
|
|
665 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
|
|
666 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
|
|
667 | #elif _MSC_VER |
|
|
668 | #include <stdlib.h> |
|
|
669 | #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) |
|
|
670 | #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) |
|
|
671 | #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) |
|
|
672 | #else |
|
|
673 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
|
|
674 | ecb_function_ ecb_const uint16_t |
|
|
675 | ecb_bswap16 (uint16_t x) |
|
|
676 | { |
|
|
677 | return ecb_rotl16 (x, 8); |
|
|
678 | } |
|
|
679 | |
|
|
680 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
|
|
681 | ecb_function_ ecb_const uint32_t |
|
|
682 | ecb_bswap32 (uint32_t x) |
|
|
683 | { |
|
|
684 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
|
|
685 | } |
|
|
686 | |
|
|
687 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
|
|
688 | ecb_function_ ecb_const uint64_t |
|
|
689 | ecb_bswap64 (uint64_t x) |
|
|
690 | { |
|
|
691 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
|
|
692 | } |
|
|
693 | #endif |
|
|
694 | |
|
|
695 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
| 64 | # define ecb_unreachable() __builtin_unreachable () |
696 | #define ecb_unreachable() __builtin_unreachable () |
| 65 | #else |
697 | #else |
| 66 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
698 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
| 67 | ECB_HEADER_INLINE void ecb_unreachable () ecb_attribute ((noreturn)); |
699 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
| 68 | ECB_HEADER_INLINE void ecb_unreachable () { } |
700 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
| 69 | #endif |
701 | #endif |
| 70 | |
|
|
| 71 | /* put into ifs if you are very sure that the expression */ |
|
|
| 72 | /* is mostly true or mosty false. note that these return */ |
|
|
| 73 | /* booleans, not the expression. */ |
|
|
| 74 | #define ecb_expect_false(expr) ecb_expect ((expr) ? 1 : 0, 0) |
|
|
| 75 | #define ecb_expect_true(expr) ecb_expect ((expr) ? 1 : 0, 1) |
|
|
| 76 | |
702 | |
| 77 | /* try to tell the compiler that some condition is definitely true */ |
703 | /* try to tell the compiler that some condition is definitely true */ |
| 78 | #define ecb_assume(cond) do { if (!(cond)) unreachable (); } while (0) |
704 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
| 79 | |
705 | |
| 80 | /* count trailing zero bits and count # of one bits */ |
706 | ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); |
| 81 | #if ECB_GCC_VERSION(3,4) |
707 | ecb_inline ecb_const uint32_t |
| 82 | ECB_HEADER_INLINE int ecb_ctz (unsigned int x) { return __builtin_ctz (x); } |
708 | ecb_byteorder_helper (void) |
| 83 | ECB_HEADER_INLINE int ecb_popcount (unsigned int x) { return __builtin_popcount (x); } |
|
|
| 84 | #else |
|
|
| 85 | ECB_HEADER_INLINE |
|
|
| 86 | ecb_ctz (unsigned int x) ecb_const |
|
|
| 87 | { |
709 | { |
| 88 | int r = 0; |
710 | /* the union code still generates code under pressure in gcc, */ |
| 89 | |
711 | /* but less than using pointers, and always seems to */ |
| 90 | x &= -x; // this isolates the lowest bit |
712 | /* successfully return a constant. */ |
| 91 | |
713 | /* the reason why we have this horrible preprocessor mess */ |
| 92 | if (x & 0xaaaaaaaa) r += 1; |
714 | /* is to avoid it in all cases, at least on common architectures */ |
| 93 | if (x & 0xcccccccc) r += 2; |
715 | /* or when using a recent enough gcc version (>= 4.6) */ |
| 94 | if (x & 0xf0f0f0f0) r += 4; |
716 | #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \ |
| 95 | if (x & 0xff00ff00) r += 8; |
717 | || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__) |
| 96 | if (x & 0xffff0000) r += 16; |
718 | #define ECB_LITTLE_ENDIAN 1 |
| 97 | |
719 | return 0x44332211; |
|
|
720 | #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \ |
|
|
721 | || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__) |
|
|
722 | #define ECB_BIG_ENDIAN 1 |
|
|
723 | return 0x11223344; |
|
|
724 | #else |
|
|
725 | union |
|
|
726 | { |
|
|
727 | uint8_t c[4]; |
|
|
728 | uint32_t u; |
|
|
729 | } u = { 0x11, 0x22, 0x33, 0x44 }; |
| 98 | return r; |
730 | return u.u; |
|
|
731 | #endif |
| 99 | } |
732 | } |
| 100 | |
733 | |
| 101 | ECB_HEADER_INLINE |
734 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
| 102 | ecb_popcount (unsigned int x) ecb_const |
735 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } |
|
|
736 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
|
|
737 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } |
|
|
738 | |
|
|
739 | /*****************************************************************************/ |
|
|
740 | /* unaligned load/store */ |
|
|
741 | |
|
|
742 | ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } |
|
|
743 | ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } |
|
|
744 | ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } |
|
|
745 | |
|
|
746 | ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } |
|
|
747 | ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } |
|
|
748 | ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } |
|
|
749 | |
|
|
750 | ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
751 | ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
752 | ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
753 | |
|
|
754 | ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); } |
|
|
755 | ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); } |
|
|
756 | ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); } |
|
|
757 | |
|
|
758 | ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); } |
|
|
759 | ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); } |
|
|
760 | ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); } |
|
|
761 | |
|
|
762 | ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; } |
|
|
763 | ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; } |
|
|
764 | ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; } |
|
|
765 | |
|
|
766 | ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; } |
|
|
767 | ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; } |
|
|
768 | ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; } |
|
|
769 | |
|
|
770 | ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
771 | ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
772 | ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
773 | |
|
|
774 | 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)); } |
|
|
775 | 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)); } |
|
|
776 | 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)); } |
|
|
777 | |
|
|
778 | 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)); } |
|
|
779 | 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)); } |
|
|
780 | 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)); } |
|
|
781 | |
|
|
782 | #if ECB_CPP |
|
|
783 | |
|
|
784 | inline uint8_t ecb_bswap (uint8_t v) { return v; } |
|
|
785 | inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); } |
|
|
786 | inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); } |
|
|
787 | inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); } |
|
|
788 | |
|
|
789 | template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } |
|
|
790 | template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } |
|
|
791 | template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; } |
|
|
792 | template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); } |
|
|
793 | template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); } |
|
|
794 | template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; } |
|
|
795 | template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); } |
|
|
796 | template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); } |
|
|
797 | |
|
|
798 | template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; } |
|
|
799 | template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; } |
|
|
800 | template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; } |
|
|
801 | template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); } |
|
|
802 | template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); } |
|
|
803 | template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); } |
|
|
804 | template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); } |
|
|
805 | template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); } |
|
|
806 | |
|
|
807 | #endif |
|
|
808 | |
|
|
809 | /*****************************************************************************/ |
|
|
810 | /* division */ |
|
|
811 | |
|
|
812 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
|
|
813 | /* C99 tightened the definition of %, so we can use a more efficient version */ |
|
|
814 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
|
|
815 | #else |
|
|
816 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
|
|
817 | #endif |
|
|
818 | |
|
|
819 | #if ECB_CPP |
|
|
820 | template<typename T> |
|
|
821 | static inline T ecb_div_rd (T val, T div) |
|
|
822 | { |
|
|
823 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
|
|
824 | } |
|
|
825 | template<typename T> |
|
|
826 | static inline T ecb_div_ru (T val, T div) |
|
|
827 | { |
|
|
828 | return val < 0 ? - ((-val ) / div) : (val + div - 1) / div; |
|
|
829 | } |
|
|
830 | #else |
|
|
831 | #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
|
|
832 | #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
|
|
833 | #endif |
|
|
834 | |
|
|
835 | /*****************************************************************************/ |
|
|
836 | /* array length */ |
|
|
837 | |
|
|
838 | #if ecb_cplusplus_does_not_suck |
|
|
839 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
|
|
840 | template<typename T, int N> |
|
|
841 | static inline int ecb_array_length (const T (&arr)[N]) |
|
|
842 | { |
|
|
843 | return N; |
|
|
844 | } |
|
|
845 | #else |
|
|
846 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
|
|
847 | #endif |
|
|
848 | |
|
|
849 | /*****************************************************************************/ |
|
|
850 | /* IEEE 754-2008 half float conversions */ |
|
|
851 | |
|
|
852 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
|
|
853 | ecb_function_ ecb_const uint32_t |
|
|
854 | ecb_binary16_to_binary32 (uint32_t x) |
| 103 | { |
855 | { |
| 104 | x -= (x >> 1) & 0x55555555; |
856 | unsigned int s = (x & 0x8000) << (31 - 15); |
| 105 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
857 | int e = (x >> 10) & 0x001f; |
| 106 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
858 | unsigned int m = x & 0x03ff; |
| 107 | x *= 0x01010101; |
|
|
| 108 | |
859 | |
| 109 | return x >> 24; |
860 | if (ecb_expect_false (e == 31)) |
|
|
861 | /* infinity or NaN */ |
|
|
862 | e = 255 - (127 - 15); |
|
|
863 | else if (ecb_expect_false (!e)) |
|
|
864 | { |
|
|
865 | if (ecb_expect_true (!m)) |
|
|
866 | /* zero, handled by code below by forcing e to 0 */ |
|
|
867 | e = 0 - (127 - 15); |
|
|
868 | else |
|
|
869 | { |
|
|
870 | /* subnormal, renormalise */ |
|
|
871 | unsigned int s = 10 - ecb_ld32 (m); |
|
|
872 | |
|
|
873 | m = (m << s) & 0x3ff; /* mask implicit bit */ |
|
|
874 | e -= s - 1; |
|
|
875 | } |
|
|
876 | } |
|
|
877 | |
|
|
878 | /* e and m now are normalised, or zero, (or inf or nan) */ |
|
|
879 | e += 127 - 15; |
|
|
880 | |
|
|
881 | return s | (e << 23) | (m << (23 - 10)); |
| 110 | } |
882 | } |
| 111 | #endif |
|
|
| 112 | |
883 | |
| 113 | ECB_HEADER_INLINE unsigned char |
884 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
| 114 | ecb_byteorder_helper () ecb_const |
885 | ecb_function_ ecb_const uint16_t |
|
|
886 | ecb_binary32_to_binary16 (uint32_t x) |
| 115 | { |
887 | { |
| 116 | const uint32_t u = 0x11223344; |
888 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
| 117 | return *(unsigned char *)&u; |
889 | int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
|
|
890 | unsigned int m = x & 0x007fffff; |
|
|
891 | |
|
|
892 | x &= 0x7fffffff; |
|
|
893 | |
|
|
894 | /* if it's within range of binary16 normals, use fast path */ |
|
|
895 | if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) |
|
|
896 | { |
|
|
897 | /* mantissa round-to-even */ |
|
|
898 | m += 0x00000fff + ((m >> (23 - 10)) & 1); |
|
|
899 | |
|
|
900 | /* handle overflow */ |
|
|
901 | if (ecb_expect_false (m >= 0x00800000)) |
|
|
902 | { |
|
|
903 | m >>= 1; |
|
|
904 | e += 1; |
|
|
905 | } |
|
|
906 | |
|
|
907 | return s | (e << 10) | (m >> (23 - 10)); |
|
|
908 | } |
|
|
909 | |
|
|
910 | /* handle large numbers and infinity */ |
|
|
911 | if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) |
|
|
912 | return s | 0x7c00; |
|
|
913 | |
|
|
914 | /* handle zero, subnormals and small numbers */ |
|
|
915 | if (ecb_expect_true (x < 0x38800000)) |
|
|
916 | { |
|
|
917 | /* zero */ |
|
|
918 | if (ecb_expect_true (!x)) |
|
|
919 | return s; |
|
|
920 | |
|
|
921 | /* handle subnormals */ |
|
|
922 | |
|
|
923 | /* too small, will be zero */ |
|
|
924 | if (e < (14 - 24)) /* might not be sharp, but is good enough */ |
|
|
925 | return s; |
|
|
926 | |
|
|
927 | m |= 0x00800000; /* make implicit bit explicit */ |
|
|
928 | |
|
|
929 | /* very tricky - we need to round to the nearest e (+10) bit value */ |
|
|
930 | { |
|
|
931 | unsigned int bits = 14 - e; |
|
|
932 | unsigned int half = (1 << (bits - 1)) - 1; |
|
|
933 | unsigned int even = (m >> bits) & 1; |
|
|
934 | |
|
|
935 | /* if this overflows, we will end up with a normalised number */ |
|
|
936 | m = (m + half + even) >> bits; |
|
|
937 | } |
|
|
938 | |
|
|
939 | return s | m; |
|
|
940 | } |
|
|
941 | |
|
|
942 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
|
|
943 | m >>= 13; |
|
|
944 | |
|
|
945 | return s | 0x7c00 | m | !m; |
| 118 | } |
946 | } |
| 119 | |
947 | |
| 120 | ECB_HEADER_INLINE bool ecb_big_endian () ecb_const { return ecb_byteorder_helper () == 0x11; }; |
948 | /*******************************************************************************/ |
| 121 | ECB_HEADER_INLINE bool ecb_network () ecb_const { return big_endian (); }; |
949 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
| 122 | ECB_HEADER_INLINE bool ecb_little_endian () ecb_const { return ecb_byteorder_helper () == 0x44; }; |
|
|
| 123 | ECB_HEADER_INLINE bool ecb_vax () ecb_const { return little_endian (); }; |
|
|
| 124 | |
950 | |
|
|
951 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
|
|
952 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
|
|
953 | #if 0 \ |
|
|
954 | || __i386 || __i386__ \ |
|
|
955 | || ECB_GCC_AMD64 \ |
|
|
956 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
|
|
957 | || defined __s390__ || defined __s390x__ \ |
|
|
958 | || defined __mips__ \ |
|
|
959 | || defined __alpha__ \ |
|
|
960 | || defined __hppa__ \ |
|
|
961 | || defined __ia64__ \ |
|
|
962 | || defined __m68k__ \ |
|
|
963 | || defined __m88k__ \ |
|
|
964 | || defined __sh__ \ |
|
|
965 | || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ |
|
|
966 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
|
|
967 | || defined __aarch64__ |
|
|
968 | #define ECB_STDFP 1 |
|
|
969 | #else |
|
|
970 | #define ECB_STDFP 0 |
|
|
971 | #endif |
| 125 | |
972 | |
|
|
973 | #ifndef ECB_NO_LIBM |
|
|
974 | |
|
|
975 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
|
|
976 | |
|
|
977 | /* only the oldest of old doesn't have this one. solaris. */ |
|
|
978 | #ifdef INFINITY |
|
|
979 | #define ECB_INFINITY INFINITY |
|
|
980 | #else |
|
|
981 | #define ECB_INFINITY HUGE_VAL |
| 126 | #endif |
982 | #endif |
| 127 | |
983 | |
|
|
984 | #ifdef NAN |
|
|
985 | #define ECB_NAN NAN |
|
|
986 | #else |
|
|
987 | #define ECB_NAN ECB_INFINITY |
|
|
988 | #endif |
|
|
989 | |
|
|
990 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
|
|
991 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
|
|
992 | #define ecb_frexpf(x,e) frexpf ((x), (e)) |
|
|
993 | #else |
|
|
994 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
|
|
995 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
|
|
996 | #endif |
|
|
997 | |
|
|
998 | /* convert a float to ieee single/binary32 */ |
|
|
999 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
|
|
1000 | ecb_function_ ecb_const uint32_t |
|
|
1001 | ecb_float_to_binary32 (float x) |
|
|
1002 | { |
|
|
1003 | uint32_t r; |
|
|
1004 | |
|
|
1005 | #if ECB_STDFP |
|
|
1006 | memcpy (&r, &x, 4); |
|
|
1007 | #else |
|
|
1008 | /* slow emulation, works for anything but -0 */ |
|
|
1009 | uint32_t m; |
|
|
1010 | int e; |
|
|
1011 | |
|
|
1012 | if (x == 0e0f ) return 0x00000000U; |
|
|
1013 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
|
|
1014 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
|
|
1015 | if (x != x ) return 0x7fbfffffU; |
|
|
1016 | |
|
|
1017 | m = ecb_frexpf (x, &e) * 0x1000000U; |
|
|
1018 | |
|
|
1019 | r = m & 0x80000000U; |
|
|
1020 | |
|
|
1021 | if (r) |
|
|
1022 | m = -m; |
|
|
1023 | |
|
|
1024 | if (e <= -126) |
|
|
1025 | { |
|
|
1026 | m &= 0xffffffU; |
|
|
1027 | m >>= (-125 - e); |
|
|
1028 | e = -126; |
|
|
1029 | } |
|
|
1030 | |
|
|
1031 | r |= (e + 126) << 23; |
|
|
1032 | r |= m & 0x7fffffU; |
|
|
1033 | #endif |
|
|
1034 | |
|
|
1035 | return r; |
|
|
1036 | } |
|
|
1037 | |
|
|
1038 | /* converts an ieee single/binary32 to a float */ |
|
|
1039 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
|
|
1040 | ecb_function_ ecb_const float |
|
|
1041 | ecb_binary32_to_float (uint32_t x) |
|
|
1042 | { |
|
|
1043 | float r; |
|
|
1044 | |
|
|
1045 | #if ECB_STDFP |
|
|
1046 | memcpy (&r, &x, 4); |
|
|
1047 | #else |
|
|
1048 | /* emulation, only works for normals and subnormals and +0 */ |
|
|
1049 | int neg = x >> 31; |
|
|
1050 | int e = (x >> 23) & 0xffU; |
|
|
1051 | |
|
|
1052 | x &= 0x7fffffU; |
|
|
1053 | |
|
|
1054 | if (e) |
|
|
1055 | x |= 0x800000U; |
|
|
1056 | else |
|
|
1057 | e = 1; |
|
|
1058 | |
|
|
1059 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
|
|
1060 | r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); |
|
|
1061 | |
|
|
1062 | r = neg ? -r : r; |
|
|
1063 | #endif |
|
|
1064 | |
|
|
1065 | return r; |
|
|
1066 | } |
|
|
1067 | |
|
|
1068 | /* convert a double to ieee double/binary64 */ |
|
|
1069 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
|
|
1070 | ecb_function_ ecb_const uint64_t |
|
|
1071 | ecb_double_to_binary64 (double x) |
|
|
1072 | { |
|
|
1073 | uint64_t r; |
|
|
1074 | |
|
|
1075 | #if ECB_STDFP |
|
|
1076 | memcpy (&r, &x, 8); |
|
|
1077 | #else |
|
|
1078 | /* slow emulation, works for anything but -0 */ |
|
|
1079 | uint64_t m; |
|
|
1080 | int e; |
|
|
1081 | |
|
|
1082 | if (x == 0e0 ) return 0x0000000000000000U; |
|
|
1083 | if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; |
|
|
1084 | if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; |
|
|
1085 | if (x != x ) return 0X7ff7ffffffffffffU; |
|
|
1086 | |
|
|
1087 | m = frexp (x, &e) * 0x20000000000000U; |
|
|
1088 | |
|
|
1089 | r = m & 0x8000000000000000;; |
|
|
1090 | |
|
|
1091 | if (r) |
|
|
1092 | m = -m; |
|
|
1093 | |
|
|
1094 | if (e <= -1022) |
|
|
1095 | { |
|
|
1096 | m &= 0x1fffffffffffffU; |
|
|
1097 | m >>= (-1021 - e); |
|
|
1098 | e = -1022; |
|
|
1099 | } |
|
|
1100 | |
|
|
1101 | r |= ((uint64_t)(e + 1022)) << 52; |
|
|
1102 | r |= m & 0xfffffffffffffU; |
|
|
1103 | #endif |
|
|
1104 | |
|
|
1105 | return r; |
|
|
1106 | } |
|
|
1107 | |
|
|
1108 | /* converts an ieee double/binary64 to a double */ |
|
|
1109 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
|
|
1110 | ecb_function_ ecb_const double |
|
|
1111 | ecb_binary64_to_double (uint64_t x) |
|
|
1112 | { |
|
|
1113 | double r; |
|
|
1114 | |
|
|
1115 | #if ECB_STDFP |
|
|
1116 | memcpy (&r, &x, 8); |
|
|
1117 | #else |
|
|
1118 | /* emulation, only works for normals and subnormals and +0 */ |
|
|
1119 | int neg = x >> 63; |
|
|
1120 | int e = (x >> 52) & 0x7ffU; |
|
|
1121 | |
|
|
1122 | x &= 0xfffffffffffffU; |
|
|
1123 | |
|
|
1124 | if (e) |
|
|
1125 | x |= 0x10000000000000U; |
|
|
1126 | else |
|
|
1127 | e = 1; |
|
|
1128 | |
|
|
1129 | /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ |
|
|
1130 | r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); |
|
|
1131 | |
|
|
1132 | r = neg ? -r : r; |
|
|
1133 | #endif |
|
|
1134 | |
|
|
1135 | return r; |
|
|
1136 | } |
|
|
1137 | |
|
|
1138 | /* convert a float to ieee half/binary16 */ |
|
|
1139 | ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); |
|
|
1140 | ecb_function_ ecb_const uint16_t |
|
|
1141 | ecb_float_to_binary16 (float x) |
|
|
1142 | { |
|
|
1143 | return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); |
|
|
1144 | } |
|
|
1145 | |
|
|
1146 | /* convert an ieee half/binary16 to float */ |
|
|
1147 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
|
|
1148 | ecb_function_ ecb_const float |
|
|
1149 | ecb_binary16_to_float (uint16_t x) |
|
|
1150 | { |
|
|
1151 | return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); |
|
|
1152 | } |
|
|
1153 | |
|
|
1154 | #endif |
|
|
1155 | |
|
|
1156 | #endif |
|
|
1157 | |
