1 | /* |
1 | /* |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de> |
4 | * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de> |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
6 | * All rights reserved. |
6 | * All rights reserved. |
7 | * |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
9 | * tion, are permitted provided that the following conditions are met: |
9 | * tion, are permitted provided that the following conditions are met: |
… | |
… | |
23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
26 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
27 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | * |
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29 | * Alternatively, the contents of this file may be used under the terms of |
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30 | * the GNU General Public License ("GPL") version 2 or any later version, |
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31 | * in which case the provisions of the GPL are applicable instead of |
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32 | * the above. If you wish to allow the use of your version of this file |
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33 | * only under the terms of the GPL and not to allow others to use your |
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34 | * version of this file under the BSD license, indicate your decision |
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35 | * by deleting the provisions above and replace them with the notice |
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36 | * and other provisions required by the GPL. If you do not delete the |
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37 | * provisions above, a recipient may use your version of this file under |
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38 | * either the BSD or the GPL. |
28 | */ |
39 | */ |
29 | |
40 | |
30 | #ifndef ECB_H |
41 | #ifndef ECB_H |
31 | #define ECB_H |
42 | #define ECB_H |
32 | |
43 | |
33 | /* 16 bits major, 16 bits minor */ |
44 | /* 16 bits major, 16 bits minor */ |
34 | #define ECB_VERSION 0x00010001 |
45 | #define ECB_VERSION 0x00010005 |
35 | |
46 | |
36 | #ifdef _WIN32 |
47 | #ifdef _WIN32 |
37 | typedef signed char int8_t; |
48 | typedef signed char int8_t; |
38 | typedef unsigned char uint8_t; |
49 | typedef unsigned char uint8_t; |
39 | typedef signed short int16_t; |
50 | typedef signed short int16_t; |
… | |
… | |
54 | #else |
65 | #else |
55 | #define ECB_PTRSIZE 4 |
66 | #define ECB_PTRSIZE 4 |
56 | typedef uint32_t uintptr_t; |
67 | typedef uint32_t uintptr_t; |
57 | typedef int32_t intptr_t; |
68 | typedef int32_t intptr_t; |
58 | #endif |
69 | #endif |
59 | typedef intptr_t ptrdiff_t; |
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60 | #else |
70 | #else |
61 | #include <inttypes.h> |
71 | #include <inttypes.h> |
62 | #if UINTMAX_MAX > 0xffffffffU |
72 | #if UINTMAX_MAX > 0xffffffffU |
63 | #define ECB_PTRSIZE 8 |
73 | #define ECB_PTRSIZE 8 |
64 | #else |
74 | #else |
65 | #define ECB_PTRSIZE 4 |
75 | #define ECB_PTRSIZE 4 |
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76 | #endif |
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77 | #endif |
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78 | |
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79 | #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) |
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80 | #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) |
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81 | |
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82 | /* work around x32 idiocy by defining proper macros */ |
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83 | #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
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84 | #if _ILP32 |
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85 | #define ECB_AMD64_X32 1 |
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86 | #else |
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87 | #define ECB_AMD64 1 |
66 | #endif |
88 | #endif |
67 | #endif |
89 | #endif |
68 | |
90 | |
69 | /* many compilers define _GNUC_ to some versions but then only implement |
91 | /* many compilers define _GNUC_ to some versions but then only implement |
70 | * what their idiot authors think are the "more important" extensions, |
92 | * what their idiot authors think are the "more important" extensions, |
71 | * causing enormous grief in return for some better fake benchmark numbers. |
93 | * causing enormous grief in return for some better fake benchmark numbers. |
72 | * or so. |
94 | * or so. |
73 | * we try to detect these and simply assume they are not gcc - if they have |
95 | * we try to detect these and simply assume they are not gcc - if they have |
74 | * an issue with that they should have done it right in the first place. |
96 | * an issue with that they should have done it right in the first place. |
75 | */ |
97 | */ |
76 | #ifndef ECB_GCC_VERSION |
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77 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
98 | #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__ |
78 | #define ECB_GCC_VERSION(major,minor) 0 |
99 | #define ECB_GCC_VERSION(major,minor) 0 |
79 | #else |
100 | #else |
80 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
101 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
81 | #endif |
102 | #endif |
82 | #endif |
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83 | |
103 | |
84 | #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ |
104 | #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor))) |
85 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
105 | |
86 | #define ECB_C11 (__STDC_VERSION__ >= 201112L) |
106 | #if __clang__ && defined __has_builtin |
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107 | #define ECB_CLANG_BUILTIN(x) __has_builtin (x) |
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108 | #else |
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109 | #define ECB_CLANG_BUILTIN(x) 0 |
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110 | #endif |
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111 | |
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112 | #if __clang__ && defined __has_extension |
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113 | #define ECB_CLANG_EXTENSION(x) __has_extension (x) |
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114 | #else |
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115 | #define ECB_CLANG_EXTENSION(x) 0 |
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116 | #endif |
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117 | |
87 | #define ECB_CPP (__cplusplus+0) |
118 | #define ECB_CPP (__cplusplus+0) |
88 | #define ECB_CPP11 (__cplusplus >= 201103L) |
119 | #define ECB_CPP11 (__cplusplus >= 201103L) |
89 | |
120 | |
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121 | #if ECB_CPP |
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122 | #define ECB_C 0 |
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123 | #define ECB_STDC_VERSION 0 |
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124 | #else |
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125 | #define ECB_C 1 |
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126 | #define ECB_STDC_VERSION __STDC_VERSION__ |
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127 | #endif |
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128 | |
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129 | #define ECB_C99 (ECB_STDC_VERSION >= 199901L) |
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130 | #define ECB_C11 (ECB_STDC_VERSION >= 201112L) |
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131 | |
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132 | #if ECB_CPP |
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133 | #define ECB_EXTERN_C extern "C" |
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134 | #define ECB_EXTERN_C_BEG ECB_EXTERN_C { |
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135 | #define ECB_EXTERN_C_END } |
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136 | #else |
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137 | #define ECB_EXTERN_C extern |
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138 | #define ECB_EXTERN_C_BEG |
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139 | #define ECB_EXTERN_C_END |
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140 | #endif |
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141 | |
90 | /*****************************************************************************/ |
142 | /*****************************************************************************/ |
91 | |
143 | |
92 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
144 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
93 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
145 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
94 | |
146 | |
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96 | #define ECB_NO_SMP 1 |
148 | #define ECB_NO_SMP 1 |
97 | #endif |
149 | #endif |
98 | |
150 | |
99 | #if ECB_NO_SMP |
151 | #if ECB_NO_SMP |
100 | #define ECB_MEMORY_FENCE do { } while (0) |
152 | #define ECB_MEMORY_FENCE do { } while (0) |
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153 | #endif |
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154 | |
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155 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ |
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156 | #if __xlC__ && ECB_CPP |
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157 | #include <builtins.h> |
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158 | #endif |
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159 | |
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160 | #if 1400 <= _MSC_VER |
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161 | #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ |
101 | #endif |
162 | #endif |
102 | |
163 | |
103 | #ifndef ECB_MEMORY_FENCE |
164 | #ifndef ECB_MEMORY_FENCE |
104 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
165 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
105 | #if __i386 || __i386__ |
166 | #if __i386 || __i386__ |
106 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
167 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
107 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
168 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
108 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
169 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
109 | #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ |
170 | #elif ECB_GCC_AMD64 |
110 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
171 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
111 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
172 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
112 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
173 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
113 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
174 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
114 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
175 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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116 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
177 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
117 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
178 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
118 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
179 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
119 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
180 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
120 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
181 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
121 | #elif __sparc || __sparc__ |
182 | #elif __aarch64__ |
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183 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
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184 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
122 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
185 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
123 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
186 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
124 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
187 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
125 | #elif defined __s390__ || defined __s390x__ |
188 | #elif defined __s390__ || defined __s390x__ |
126 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
189 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
127 | #elif defined __mips__ |
190 | #elif defined __mips__ |
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191 | /* GNU/Linux emulates sync on mips1 architectures, so we force its use */ |
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192 | /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */ |
128 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
193 | #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory") |
129 | #elif defined __alpha__ |
194 | #elif defined __alpha__ |
130 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
195 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") |
131 | #elif defined __hppa__ |
196 | #elif defined __hppa__ |
132 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
197 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
133 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
198 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
134 | #elif defined __ia64__ |
199 | #elif defined __ia64__ |
135 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
200 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory") |
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201 | #elif defined __m68k__ |
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202 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
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203 | #elif defined __m88k__ |
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204 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory") |
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205 | #elif defined __sh__ |
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206 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory") |
136 | #endif |
207 | #endif |
137 | #endif |
208 | #endif |
138 | #endif |
209 | #endif |
139 | |
210 | |
140 | #ifndef ECB_MEMORY_FENCE |
211 | #ifndef ECB_MEMORY_FENCE |
141 | #if ECB_GCC_VERSION(4,7) |
212 | #if ECB_GCC_VERSION(4,7) |
142 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
213 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
143 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
214 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
144 | #elif defined __clang && __has_feature (cxx_atomic) |
215 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
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216 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
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217 | |
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218 | #elif ECB_CLANG_EXTENSION(c_atomic) |
145 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
219 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
146 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
220 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
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221 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
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222 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
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223 | |
147 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
224 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
148 | #define ECB_MEMORY_FENCE __sync_synchronize () |
225 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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226 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
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227 | /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */ |
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228 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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229 | #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier() |
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230 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */ |
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231 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier() |
149 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
232 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
150 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
233 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
151 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
234 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
152 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
235 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
153 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
236 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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173 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
256 | /* any fence other than seq_cst, which isn't very efficient for us. */ |
174 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
257 | /* Why that is, we don't know - either the C11 memory model is quite useless */ |
175 | /* for most usages, or gcc and clang have a bug */ |
258 | /* for most usages, or gcc and clang have a bug */ |
176 | /* I *currently* lean towards the latter, and inefficiently implement */ |
259 | /* I *currently* lean towards the latter, and inefficiently implement */ |
177 | /* all three of ecb's fences as a seq_cst fence */ |
260 | /* all three of ecb's fences as a seq_cst fence */ |
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261 | /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */ |
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262 | /* for all __atomic_thread_fence's except seq_cst */ |
178 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
263 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
179 | #endif |
264 | #endif |
180 | #endif |
265 | #endif |
181 | |
266 | |
182 | #ifndef ECB_MEMORY_FENCE |
267 | #ifndef ECB_MEMORY_FENCE |
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205 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
290 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
206 | #endif |
291 | #endif |
207 | |
292 | |
208 | /*****************************************************************************/ |
293 | /*****************************************************************************/ |
209 | |
294 | |
210 | #if __cplusplus |
295 | #if ECB_CPP |
211 | #define ecb_inline static inline |
296 | #define ecb_inline static inline |
212 | #elif ECB_GCC_VERSION(2,5) |
297 | #elif ECB_GCC_VERSION(2,5) |
213 | #define ecb_inline static __inline__ |
298 | #define ecb_inline static __inline__ |
214 | #elif ECB_C99 |
299 | #elif ECB_C99 |
215 | #define ecb_inline static inline |
300 | #define ecb_inline static inline |
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229 | |
314 | |
230 | #define ECB_CONCAT_(a, b) a ## b |
315 | #define ECB_CONCAT_(a, b) a ## b |
231 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
316 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
232 | #define ECB_STRINGIFY_(a) # a |
317 | #define ECB_STRINGIFY_(a) # a |
233 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
318 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
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319 | #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) |
234 | |
320 | |
235 | #define ecb_function_ ecb_inline |
321 | #define ecb_function_ ecb_inline |
236 | |
322 | |
237 | #if ECB_GCC_VERSION(3,1) |
323 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
238 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
324 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
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325 | #else |
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326 | #define ecb_attribute(attrlist) |
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327 | #endif |
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328 | |
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329 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p) |
239 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
330 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
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331 | #else |
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332 | /* possible C11 impl for integral types |
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333 | typedef struct ecb_is_constant_struct ecb_is_constant_struct; |
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334 | #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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335 | |
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336 | #define ecb_is_constant(expr) 0 |
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337 | #endif |
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338 | |
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339 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect) |
240 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
340 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
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341 | #else |
|
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342 | #define ecb_expect(expr,value) (expr) |
|
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343 | #endif |
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344 | |
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345 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch) |
241 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
346 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
242 | #else |
347 | #else |
243 | #define ecb_attribute(attrlist) |
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|
244 | #define ecb_is_constant(expr) 0 |
|
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245 | #define ecb_expect(expr,value) (expr) |
|
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246 | #define ecb_prefetch(addr,rw,locality) |
348 | #define ecb_prefetch(addr,rw,locality) |
247 | #endif |
349 | #endif |
248 | |
350 | |
249 | /* no emulation for ecb_decltype */ |
351 | /* no emulation for ecb_decltype */ |
250 | #if ECB_GCC_VERSION(4,5) |
352 | #if ECB_CPP11 |
|
|
353 | // older implementations might have problems with decltype(x)::type, work around it |
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354 | template<class T> struct ecb_decltype_t { typedef T type; }; |
251 | #define ecb_decltype(x) __decltype(x) |
355 | #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type |
252 | #elif ECB_GCC_VERSION(3,0) |
356 | #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8) |
253 | #define ecb_decltype(x) __typeof(x) |
357 | #define ecb_decltype(x) __typeof__ (x) |
254 | #endif |
358 | #endif |
255 | |
359 | |
|
|
360 | #if _MSC_VER >= 1300 |
|
|
361 | #define ecb_deprecated __declspec (deprecated) |
|
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362 | #else |
|
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363 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
|
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364 | #endif |
|
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365 | |
|
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366 | #if _MSC_VER >= 1500 |
|
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367 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
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368 | #elif ECB_GCC_VERSION(4,5) |
|
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369 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
|
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370 | #else |
|
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371 | #define ecb_deprecated_message(msg) ecb_deprecated |
|
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372 | #endif |
|
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373 | |
|
|
374 | #if _MSC_VER >= 1400 |
|
|
375 | #define ecb_noinline __declspec (noinline) |
|
|
376 | #else |
256 | #define ecb_noinline ecb_attribute ((__noinline__)) |
377 | #define ecb_noinline ecb_attribute ((__noinline__)) |
|
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378 | #endif |
|
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379 | |
257 | #define ecb_unused ecb_attribute ((__unused__)) |
380 | #define ecb_unused ecb_attribute ((__unused__)) |
258 | #define ecb_const ecb_attribute ((__const__)) |
381 | #define ecb_const ecb_attribute ((__const__)) |
259 | #define ecb_pure ecb_attribute ((__pure__)) |
382 | #define ecb_pure ecb_attribute ((__pure__)) |
260 | |
383 | |
261 | #if ECB_C11 |
384 | #if ECB_C11 || __IBMC_NORETURN |
|
|
385 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ |
262 | #define ecb_noreturn _Noreturn |
386 | #define ecb_noreturn _Noreturn |
|
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387 | #elif ECB_CPP11 |
|
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388 | #define ecb_noreturn [[noreturn]] |
|
|
389 | #elif _MSC_VER >= 1200 |
|
|
390 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ |
|
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391 | #define ecb_noreturn __declspec (noreturn) |
263 | #else |
392 | #else |
264 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
393 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
265 | #endif |
394 | #endif |
266 | |
395 | |
267 | #if ECB_GCC_VERSION(4,3) |
396 | #if ECB_GCC_VERSION(4,3) |
… | |
… | |
282 | /* for compatibility to the rest of the world */ |
411 | /* for compatibility to the rest of the world */ |
283 | #define ecb_likely(expr) ecb_expect_true (expr) |
412 | #define ecb_likely(expr) ecb_expect_true (expr) |
284 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
413 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
285 | |
414 | |
286 | /* count trailing zero bits and count # of one bits */ |
415 | /* count trailing zero bits and count # of one bits */ |
287 | #if ECB_GCC_VERSION(3,4) |
416 | #if ECB_GCC_VERSION(3,4) \ |
|
|
417 | || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \ |
|
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418 | && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \ |
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419 | && ECB_CLANG_BUILTIN(__builtin_popcount)) |
288 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
420 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
289 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
421 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
290 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
422 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
291 | #define ecb_ctz32(x) __builtin_ctz (x) |
423 | #define ecb_ctz32(x) __builtin_ctz (x) |
292 | #define ecb_ctz64(x) __builtin_ctzll (x) |
424 | #define ecb_ctz64(x) __builtin_ctzll (x) |
293 | #define ecb_popcount32(x) __builtin_popcount (x) |
425 | #define ecb_popcount32(x) __builtin_popcount (x) |
294 | /* no popcountll */ |
426 | /* no popcountll */ |
295 | #else |
427 | #else |
296 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
428 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
297 | ecb_function_ int |
429 | ecb_function_ ecb_const int |
298 | ecb_ctz32 (uint32_t x) |
430 | ecb_ctz32 (uint32_t x) |
299 | { |
431 | { |
|
|
432 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
|
433 | unsigned long r = 0; |
|
|
434 | _BitScanForward (&r, x); |
|
|
435 | return (int)r; |
|
|
436 | #else |
300 | int r = 0; |
437 | int r = 0; |
301 | |
438 | |
302 | x &= ~x + 1; /* this isolates the lowest bit */ |
439 | x &= ~x + 1; /* this isolates the lowest bit */ |
303 | |
440 | |
304 | #if ECB_branchless_on_i386 |
441 | #if ECB_branchless_on_i386 |
… | |
… | |
314 | if (x & 0xff00ff00) r += 8; |
451 | if (x & 0xff00ff00) r += 8; |
315 | if (x & 0xffff0000) r += 16; |
452 | if (x & 0xffff0000) r += 16; |
316 | #endif |
453 | #endif |
317 | |
454 | |
318 | return r; |
455 | return r; |
|
|
456 | #endif |
319 | } |
457 | } |
320 | |
458 | |
321 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
459 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
322 | ecb_function_ int |
460 | ecb_function_ ecb_const int |
323 | ecb_ctz64 (uint64_t x) |
461 | ecb_ctz64 (uint64_t x) |
324 | { |
462 | { |
|
|
463 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
464 | unsigned long r = 0; |
|
|
465 | _BitScanForward64 (&r, x); |
|
|
466 | return (int)r; |
|
|
467 | #else |
325 | int shift = x & 0xffffffffU ? 0 : 32; |
468 | int shift = x & 0xffffffff ? 0 : 32; |
326 | return ecb_ctz32 (x >> shift) + shift; |
469 | return ecb_ctz32 (x >> shift) + shift; |
|
|
470 | #endif |
327 | } |
471 | } |
328 | |
472 | |
329 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
473 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
330 | ecb_function_ int |
474 | ecb_function_ ecb_const int |
331 | ecb_popcount32 (uint32_t x) |
475 | ecb_popcount32 (uint32_t x) |
332 | { |
476 | { |
333 | x -= (x >> 1) & 0x55555555; |
477 | x -= (x >> 1) & 0x55555555; |
334 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
478 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
335 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
479 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
336 | x *= 0x01010101; |
480 | x *= 0x01010101; |
337 | |
481 | |
338 | return x >> 24; |
482 | return x >> 24; |
339 | } |
483 | } |
340 | |
484 | |
341 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
485 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
342 | ecb_function_ int ecb_ld32 (uint32_t x) |
486 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
343 | { |
487 | { |
|
|
488 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
|
489 | unsigned long r = 0; |
|
|
490 | _BitScanReverse (&r, x); |
|
|
491 | return (int)r; |
|
|
492 | #else |
344 | int r = 0; |
493 | int r = 0; |
345 | |
494 | |
346 | if (x >> 16) { x >>= 16; r += 16; } |
495 | if (x >> 16) { x >>= 16; r += 16; } |
347 | if (x >> 8) { x >>= 8; r += 8; } |
496 | if (x >> 8) { x >>= 8; r += 8; } |
348 | if (x >> 4) { x >>= 4; r += 4; } |
497 | if (x >> 4) { x >>= 4; r += 4; } |
349 | if (x >> 2) { x >>= 2; r += 2; } |
498 | if (x >> 2) { x >>= 2; r += 2; } |
350 | if (x >> 1) { r += 1; } |
499 | if (x >> 1) { r += 1; } |
351 | |
500 | |
352 | return r; |
501 | return r; |
|
|
502 | #endif |
353 | } |
503 | } |
354 | |
504 | |
355 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
505 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
356 | ecb_function_ int ecb_ld64 (uint64_t x) |
506 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
357 | { |
507 | { |
|
|
508 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
509 | unsigned long r = 0; |
|
|
510 | _BitScanReverse64 (&r, x); |
|
|
511 | return (int)r; |
|
|
512 | #else |
358 | int r = 0; |
513 | int r = 0; |
359 | |
514 | |
360 | if (x >> 32) { x >>= 32; r += 32; } |
515 | if (x >> 32) { x >>= 32; r += 32; } |
361 | |
516 | |
362 | return r + ecb_ld32 (x); |
517 | return r + ecb_ld32 (x); |
363 | } |
|
|
364 | #endif |
518 | #endif |
|
|
519 | } |
|
|
520 | #endif |
365 | |
521 | |
366 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; |
522 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
367 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
523 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
368 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; |
524 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
369 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
525 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
370 | |
526 | |
371 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
527 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
372 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
528 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
373 | { |
529 | { |
374 | return ( (x * 0x0802U & 0x22110U) |
530 | return ( (x * 0x0802U & 0x22110U) |
375 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
531 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
376 | } |
532 | } |
377 | |
533 | |
378 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; |
534 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
379 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
535 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
380 | { |
536 | { |
381 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
537 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
382 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
538 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
383 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
539 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
384 | x = ( x >> 8 ) | ( x << 8); |
540 | x = ( x >> 8 ) | ( x << 8); |
385 | |
541 | |
386 | return x; |
542 | return x; |
387 | } |
543 | } |
388 | |
544 | |
389 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; |
545 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
390 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
546 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
391 | { |
547 | { |
392 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
548 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
393 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
549 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
394 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
550 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
395 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
551 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
… | |
… | |
398 | return x; |
554 | return x; |
399 | } |
555 | } |
400 | |
556 | |
401 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
557 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
402 | /* so for this version we are lazy */ |
558 | /* so for this version we are lazy */ |
403 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
559 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
404 | ecb_function_ int |
560 | ecb_function_ ecb_const int |
405 | ecb_popcount64 (uint64_t x) |
561 | ecb_popcount64 (uint64_t x) |
406 | { |
562 | { |
407 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
563 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
408 | } |
564 | } |
409 | |
565 | |
410 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
566 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
411 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
567 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
412 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
568 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
413 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
569 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
414 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
570 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
415 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
571 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
416 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
572 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
417 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
573 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
418 | |
574 | |
419 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
575 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
420 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
576 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
421 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
577 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
422 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
578 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
423 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
579 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
424 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
580 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
425 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
581 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
426 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
582 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
427 | |
583 | |
428 | #if ECB_GCC_VERSION(4,3) |
584 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
|
|
585 | #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) |
|
|
586 | #define ecb_bswap16(x) __builtin_bswap16 (x) |
|
|
587 | #else |
429 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
588 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
|
|
589 | #endif |
430 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
590 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
431 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
591 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
|
|
592 | #elif _MSC_VER |
|
|
593 | #include <stdlib.h> |
|
|
594 | #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) |
|
|
595 | #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) |
|
|
596 | #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) |
432 | #else |
597 | #else |
433 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
598 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
434 | ecb_function_ uint16_t |
599 | ecb_function_ ecb_const uint16_t |
435 | ecb_bswap16 (uint16_t x) |
600 | ecb_bswap16 (uint16_t x) |
436 | { |
601 | { |
437 | return ecb_rotl16 (x, 8); |
602 | return ecb_rotl16 (x, 8); |
438 | } |
603 | } |
439 | |
604 | |
440 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
605 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
441 | ecb_function_ uint32_t |
606 | ecb_function_ ecb_const uint32_t |
442 | ecb_bswap32 (uint32_t x) |
607 | ecb_bswap32 (uint32_t x) |
443 | { |
608 | { |
444 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
609 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
445 | } |
610 | } |
446 | |
611 | |
447 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
612 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
448 | ecb_function_ uint64_t |
613 | ecb_function_ ecb_const uint64_t |
449 | ecb_bswap64 (uint64_t x) |
614 | ecb_bswap64 (uint64_t x) |
450 | { |
615 | { |
451 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
616 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
452 | } |
617 | } |
453 | #endif |
618 | #endif |
454 | |
619 | |
455 | #if ECB_GCC_VERSION(4,5) |
620 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
456 | #define ecb_unreachable() __builtin_unreachable () |
621 | #define ecb_unreachable() __builtin_unreachable () |
457 | #else |
622 | #else |
458 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
623 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
459 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
624 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
460 | ecb_inline void ecb_unreachable (void) { } |
625 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
461 | #endif |
626 | #endif |
462 | |
627 | |
463 | /* try to tell the compiler that some condition is definitely true */ |
628 | /* try to tell the compiler that some condition is definitely true */ |
464 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
629 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
465 | |
630 | |
466 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
631 | ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); |
467 | ecb_inline unsigned char |
632 | ecb_inline ecb_const unsigned char |
468 | ecb_byteorder_helper (void) |
633 | ecb_byteorder_helper (void) |
469 | { |
634 | { |
470 | /* the union code still generates code under pressure in gcc, */ |
635 | /* the union code still generates code under pressure in gcc, */ |
471 | /* but less than using pointers, and always seem to */ |
636 | /* but less than using pointers, and always seems to */ |
472 | /* successfully return a constant. */ |
637 | /* successfully return a constant. */ |
473 | /* the reason why we have this horrible preprocessor mess */ |
638 | /* the reason why we have this horrible preprocessor mess */ |
474 | /* is to avoid it in all cases, at least on common architectures */ |
639 | /* is to avoid it in all cases, at least on common architectures */ |
475 | /* and yes, gcc defines __BYTE_ORDER__, g++ does not */ |
640 | /* or when using a recent enough gcc version (>= 4.6) */ |
476 | #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 |
641 | #if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
477 | return 0x44; |
642 | return 0x44; |
478 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
643 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
479 | return 0x44; |
644 | return 0x44; |
480 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
645 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
481 | retrurn 0x11; |
646 | return 0x11; |
482 | #else |
647 | #else |
483 | union |
648 | union |
484 | { |
649 | { |
485 | uint32_t i; |
650 | uint32_t i; |
486 | uint8_t c; |
651 | uint8_t c; |
487 | } u = { 0x11223344 }; |
652 | } u = { 0x11223344 }; |
488 | return u.c; |
653 | return u.c; |
489 | #endif |
654 | #endif |
490 | } |
655 | } |
491 | |
656 | |
492 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
657 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
493 | ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
658 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
494 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
659 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
495 | ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
660 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
496 | |
661 | |
497 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
662 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
498 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
663 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
499 | #else |
664 | #else |
500 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
665 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
501 | #endif |
666 | #endif |
502 | |
667 | |
503 | #if __cplusplus |
668 | #if ECB_CPP |
504 | template<typename T> |
669 | template<typename T> |
505 | static inline T ecb_div_rd (T val, T div) |
670 | static inline T ecb_div_rd (T val, T div) |
506 | { |
671 | { |
507 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
672 | return val < 0 ? - ((-val + div - 1) / div) : (val ) / div; |
508 | } |
673 | } |
… | |
… | |
525 | } |
690 | } |
526 | #else |
691 | #else |
527 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
692 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
528 | #endif |
693 | #endif |
529 | |
694 | |
|
|
695 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
|
|
696 | ecb_function_ ecb_const uint32_t |
|
|
697 | ecb_binary16_to_binary32 (uint32_t x) |
|
|
698 | { |
|
|
699 | unsigned int s = (x & 0x8000) << (31 - 15); |
|
|
700 | int e = (x >> 10) & 0x001f; |
|
|
701 | unsigned int m = x & 0x03ff; |
|
|
702 | |
|
|
703 | if (ecb_expect_false (e == 31)) |
|
|
704 | /* infinity or NaN */ |
|
|
705 | e = 255 - (127 - 15); |
|
|
706 | else if (ecb_expect_false (!e)) |
|
|
707 | { |
|
|
708 | if (ecb_expect_true (!m)) |
|
|
709 | /* zero, handled by code below by forcing e to 0 */ |
|
|
710 | e = 0 - (127 - 15); |
|
|
711 | else |
|
|
712 | { |
|
|
713 | /* subnormal, renormalise */ |
|
|
714 | unsigned int s = 10 - ecb_ld32 (m); |
|
|
715 | |
|
|
716 | m = (m << s) & 0x3ff; /* mask implicit bit */ |
|
|
717 | e -= s - 1; |
|
|
718 | } |
|
|
719 | } |
|
|
720 | |
|
|
721 | /* e and m now are normalised, or zero, (or inf or nan) */ |
|
|
722 | e += 127 - 15; |
|
|
723 | |
|
|
724 | return s | (e << 23) | (m << (23 - 10)); |
|
|
725 | } |
|
|
726 | |
|
|
727 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
|
|
728 | ecb_function_ ecb_const uint16_t |
|
|
729 | ecb_binary32_to_binary16 (uint32_t x) |
|
|
730 | { |
|
|
731 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
|
|
732 | unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
|
|
733 | unsigned int m = x & 0x007fffff; |
|
|
734 | |
|
|
735 | x &= 0x7fffffff; |
|
|
736 | |
|
|
737 | /* if it's within range of binary16 normals, use fast path */ |
|
|
738 | if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) |
|
|
739 | { |
|
|
740 | /* mantissa round-to-even */ |
|
|
741 | m += 0x00000fff + ((m >> (23 - 10)) & 1); |
|
|
742 | |
|
|
743 | /* handle overflow */ |
|
|
744 | if (ecb_expect_false (m >= 0x00800000)) |
|
|
745 | { |
|
|
746 | m >>= 1; |
|
|
747 | e += 1; |
|
|
748 | } |
|
|
749 | |
|
|
750 | return s | (e << 10) | (m >> (23 - 10)); |
|
|
751 | } |
|
|
752 | |
|
|
753 | /* handle large numbers and infinity */ |
|
|
754 | if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) |
|
|
755 | return s | 0x7c00; |
|
|
756 | |
|
|
757 | /* handle zero, subnormals and small numbers */ |
|
|
758 | if (ecb_expect_true (x < 0x38800000)) |
|
|
759 | { |
|
|
760 | /* zero */ |
|
|
761 | if (ecb_expect_true (!x)) |
|
|
762 | return s; |
|
|
763 | |
|
|
764 | /* handle subnormals */ |
|
|
765 | |
|
|
766 | /* too small, will be zero */ |
|
|
767 | if (e < (14 - 24)) /* might not be sharp, but is good enough */ |
|
|
768 | return s; |
|
|
769 | |
|
|
770 | m |= 0x00800000; /* make implicit bit explicit */ |
|
|
771 | |
|
|
772 | /* very tricky - we need to round to the nearest e (+10) bit value */ |
|
|
773 | { |
|
|
774 | unsigned int bits = 14 - e; |
|
|
775 | unsigned int half = (1 << (bits - 1)) - 1; |
|
|
776 | unsigned int even = (m >> bits) & 1; |
|
|
777 | |
|
|
778 | /* if this overflows, we will end up with a normalised number */ |
|
|
779 | m = (m + half + even) >> bits; |
|
|
780 | } |
|
|
781 | |
|
|
782 | return s | m; |
|
|
783 | } |
|
|
784 | |
|
|
785 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
|
|
786 | m >>= 13; |
|
|
787 | |
|
|
788 | return s | 0x7c00 | m | !m; |
|
|
789 | } |
|
|
790 | |
|
|
791 | /*******************************************************************************/ |
|
|
792 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
|
|
793 | |
|
|
794 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
|
|
795 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
|
|
796 | #if 0 \ |
|
|
797 | || __i386 || __i386__ \ |
|
|
798 | || ECB_GCC_AMD64 \ |
|
|
799 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
|
|
800 | || defined __s390__ || defined __s390x__ \ |
|
|
801 | || defined __mips__ \ |
|
|
802 | || defined __alpha__ \ |
|
|
803 | || defined __hppa__ \ |
|
|
804 | || defined __ia64__ \ |
|
|
805 | || defined __m68k__ \ |
|
|
806 | || defined __m88k__ \ |
|
|
807 | || defined __sh__ \ |
|
|
808 | || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ |
|
|
809 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
|
|
810 | || defined __aarch64__ |
|
|
811 | #define ECB_STDFP 1 |
|
|
812 | #include <string.h> /* for memcpy */ |
|
|
813 | #else |
|
|
814 | #define ECB_STDFP 0 |
|
|
815 | #endif |
|
|
816 | |
|
|
817 | #ifndef ECB_NO_LIBM |
|
|
818 | |
|
|
819 | #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */ |
|
|
820 | |
|
|
821 | /* only the oldest of old doesn't have this one. solaris. */ |
|
|
822 | #ifdef INFINITY |
|
|
823 | #define ECB_INFINITY INFINITY |
|
|
824 | #else |
|
|
825 | #define ECB_INFINITY HUGE_VAL |
530 | #endif |
826 | #endif |
531 | |
827 | |
|
|
828 | #ifdef NAN |
|
|
829 | #define ECB_NAN NAN |
|
|
830 | #else |
|
|
831 | #define ECB_NAN ECB_INFINITY |
|
|
832 | #endif |
|
|
833 | |
|
|
834 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
|
|
835 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
|
|
836 | #define ecb_frexpf(x,e) frexpf ((x), (e)) |
|
|
837 | #else |
|
|
838 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
|
|
839 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
|
|
840 | #endif |
|
|
841 | |
|
|
842 | /* convert a float to ieee single/binary32 */ |
|
|
843 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
|
|
844 | ecb_function_ ecb_const uint32_t |
|
|
845 | ecb_float_to_binary32 (float x) |
|
|
846 | { |
|
|
847 | uint32_t r; |
|
|
848 | |
|
|
849 | #if ECB_STDFP |
|
|
850 | memcpy (&r, &x, 4); |
|
|
851 | #else |
|
|
852 | /* slow emulation, works for anything but -0 */ |
|
|
853 | uint32_t m; |
|
|
854 | int e; |
|
|
855 | |
|
|
856 | if (x == 0e0f ) return 0x00000000U; |
|
|
857 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
|
|
858 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
|
|
859 | if (x != x ) return 0x7fbfffffU; |
|
|
860 | |
|
|
861 | m = ecb_frexpf (x, &e) * 0x1000000U; |
|
|
862 | |
|
|
863 | r = m & 0x80000000U; |
|
|
864 | |
|
|
865 | if (r) |
|
|
866 | m = -m; |
|
|
867 | |
|
|
868 | if (e <= -126) |
|
|
869 | { |
|
|
870 | m &= 0xffffffU; |
|
|
871 | m >>= (-125 - e); |
|
|
872 | e = -126; |
|
|
873 | } |
|
|
874 | |
|
|
875 | r |= (e + 126) << 23; |
|
|
876 | r |= m & 0x7fffffU; |
|
|
877 | #endif |
|
|
878 | |
|
|
879 | return r; |
|
|
880 | } |
|
|
881 | |
|
|
882 | /* converts an ieee single/binary32 to a float */ |
|
|
883 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
|
|
884 | ecb_function_ ecb_const float |
|
|
885 | ecb_binary32_to_float (uint32_t x) |
|
|
886 | { |
|
|
887 | float r; |
|
|
888 | |
|
|
889 | #if ECB_STDFP |
|
|
890 | memcpy (&r, &x, 4); |
|
|
891 | #else |
|
|
892 | /* emulation, only works for normals and subnormals and +0 */ |
|
|
893 | int neg = x >> 31; |
|
|
894 | int e = (x >> 23) & 0xffU; |
|
|
895 | |
|
|
896 | x &= 0x7fffffU; |
|
|
897 | |
|
|
898 | if (e) |
|
|
899 | x |= 0x800000U; |
|
|
900 | else |
|
|
901 | e = 1; |
|
|
902 | |
|
|
903 | /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */ |
|
|
904 | r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126); |
|
|
905 | |
|
|
906 | r = neg ? -r : r; |
|
|
907 | #endif |
|
|
908 | |
|
|
909 | return r; |
|
|
910 | } |
|
|
911 | |
|
|
912 | /* convert a double to ieee double/binary64 */ |
|
|
913 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
|
|
914 | ecb_function_ ecb_const uint64_t |
|
|
915 | ecb_double_to_binary64 (double x) |
|
|
916 | { |
|
|
917 | uint64_t r; |
|
|
918 | |
|
|
919 | #if ECB_STDFP |
|
|
920 | memcpy (&r, &x, 8); |
|
|
921 | #else |
|
|
922 | /* slow emulation, works for anything but -0 */ |
|
|
923 | uint64_t m; |
|
|
924 | int e; |
|
|
925 | |
|
|
926 | if (x == 0e0 ) return 0x0000000000000000U; |
|
|
927 | if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U; |
|
|
928 | if (x < -1.79769313486231470e+308) return 0xfff0000000000000U; |
|
|
929 | if (x != x ) return 0X7ff7ffffffffffffU; |
|
|
930 | |
|
|
931 | m = frexp (x, &e) * 0x20000000000000U; |
|
|
932 | |
|
|
933 | r = m & 0x8000000000000000;; |
|
|
934 | |
|
|
935 | if (r) |
|
|
936 | m = -m; |
|
|
937 | |
|
|
938 | if (e <= -1022) |
|
|
939 | { |
|
|
940 | m &= 0x1fffffffffffffU; |
|
|
941 | m >>= (-1021 - e); |
|
|
942 | e = -1022; |
|
|
943 | } |
|
|
944 | |
|
|
945 | r |= ((uint64_t)(e + 1022)) << 52; |
|
|
946 | r |= m & 0xfffffffffffffU; |
|
|
947 | #endif |
|
|
948 | |
|
|
949 | return r; |
|
|
950 | } |
|
|
951 | |
|
|
952 | /* converts an ieee double/binary64 to a double */ |
|
|
953 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
|
|
954 | ecb_function_ ecb_const double |
|
|
955 | ecb_binary64_to_double (uint64_t x) |
|
|
956 | { |
|
|
957 | double r; |
|
|
958 | |
|
|
959 | #if ECB_STDFP |
|
|
960 | memcpy (&r, &x, 8); |
|
|
961 | #else |
|
|
962 | /* emulation, only works for normals and subnormals and +0 */ |
|
|
963 | int neg = x >> 63; |
|
|
964 | int e = (x >> 52) & 0x7ffU; |
|
|
965 | |
|
|
966 | x &= 0xfffffffffffffU; |
|
|
967 | |
|
|
968 | if (e) |
|
|
969 | x |= 0x10000000000000U; |
|
|
970 | else |
|
|
971 | e = 1; |
|
|
972 | |
|
|
973 | /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */ |
|
|
974 | r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022); |
|
|
975 | |
|
|
976 | r = neg ? -r : r; |
|
|
977 | #endif |
|
|
978 | |
|
|
979 | return r; |
|
|
980 | } |
|
|
981 | |
|
|
982 | /* convert a float to ieee half/binary16 */ |
|
|
983 | ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); |
|
|
984 | ecb_function_ ecb_const uint16_t |
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985 | ecb_float_to_binary16 (float x) |
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986 | { |
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987 | return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); |
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988 | } |
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989 | |
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990 | /* convert an ieee half/binary16 to float */ |
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991 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
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992 | ecb_function_ ecb_const float |
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993 | ecb_binary16_to_float (uint16_t x) |
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994 | { |
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995 | return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); |
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996 | } |
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997 | |
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998 | #endif |
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999 | |
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1000 | #endif |
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1001 | |