1 | /* |
1 | /* |
2 | * libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2011 Marc Alexander Lehmann |
4 | * Copyright (©) 2009-2011 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: |
… | |
… | |
28 | */ |
28 | */ |
29 | |
29 | |
30 | #ifndef ECB_H |
30 | #ifndef ECB_H |
31 | #define ECB_H |
31 | #define ECB_H |
32 | |
32 | |
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33 | #ifdef _WIN32 |
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34 | typedef signed char int8_t; |
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35 | typedef unsigned char uint8_t; |
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36 | typedef signed short int16_t; |
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37 | typedef unsigned short uint16_t; |
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38 | typedef signed int int32_t; |
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39 | typedef unsigned int uint32_t; |
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40 | #if __GNUC__ |
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41 | typedef signed long long int64_t; |
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42 | typedef unsigned long long uint64_t; |
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43 | #else /* _MSC_VER || __BORLANDC__ */ |
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44 | typedef signed __int64 int64_t; |
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45 | typedef unsigned __int64 uint64_t; |
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46 | #endif |
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47 | #else |
33 | #include <inttypes.h> |
48 | #include <inttypes.h> |
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49 | #endif |
34 | |
50 | |
35 | /* many compilers define _GNUC_ to some versions but then only implement |
51 | /* many compilers define _GNUC_ to some versions but then only implement |
36 | * what their idiot authors think are the "more important" extensions, |
52 | * what their idiot authors think are the "more important" extensions, |
37 | * causing enourmous grief for some better fake benchmark numbers or so. |
53 | * causing enourmous grief in return for some better fake benchmark numbers. |
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54 | * or so. |
38 | * we try to detect these and simply assume they are not gcc - if they have |
55 | * we try to detect these and simply assume they are not gcc - if they have |
39 | * an issue with that they should have done it right in the first place. |
56 | * an issue with that they should have done it right in the first place. |
40 | */ |
57 | */ |
41 | #if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
58 | #ifndef ECB_GCC_VERSION |
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59 | #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) |
42 | # define ECB_GCC_VERSION(major,minor) 0 |
60 | #define ECB_GCC_VERSION(major,minor) 0 |
43 | #else |
61 | #else |
44 | # define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
62 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
45 | #endif |
63 | #endif |
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64 | #endif |
46 | |
65 | |
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66 | /*****************************************************************************/ |
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67 | |
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68 | #ifndef ECB_MEMORY_FENCE |
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69 | #if ECB_GCC_VERSION(2,5) |
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70 | #if __x86 |
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71 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; or.b $0, -1(%%esp)" : : : "memory") |
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72 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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73 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */ |
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74 | #elif __amd64 |
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75 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
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76 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
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77 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") |
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78 | #endif |
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79 | #endif |
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80 | #endif |
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81 | |
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82 | #ifndef ECB_MEMORY_FENCE |
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83 | #if ECB_GCC_VERSION(4,4) |
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84 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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85 | #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) |
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86 | #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) |
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87 | #elif _MSC_VER >= 1400 |
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88 | #define ECB_MEMORY_FENCE do { } while (0) |
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89 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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90 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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91 | #elif defined(_WIN32) && defined(MemoryBarrier) |
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92 | #define ECB_MEMORY_FENCE MemoryBarrier () |
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93 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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94 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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95 | #endif |
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96 | #endif |
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97 | |
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98 | #ifndef ECB_MEMORY_FENCE |
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99 | #include <pthread.h> |
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100 | |
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101 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
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102 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
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103 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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104 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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105 | #endif |
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106 | |
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107 | /*****************************************************************************/ |
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108 | |
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109 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
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110 | |
47 | #ifndef __cplusplus |
111 | #if __cplusplus |
48 | # if __STDC_VERSION__ >= 199901L |
112 | #define ecb_inline static inline |
49 | # define ECB_INLINE inline |
113 | #elif ECB_GCC_VERSION(2,5) |
50 | typedef _Bool ecb_bool; |
114 | #define ecb_inline static __inline__ |
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115 | #elif ECB_C99 |
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116 | #define ecb_inline static inline |
51 | # else |
117 | #else |
52 | # define ECB_INLINE inline /* yeah! */ |
118 | #define ecb_inline static |
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119 | #endif |
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120 | |
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121 | #if ECB_GCC_VERSION(3,3) |
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122 | #define ecb_restrict __restrict__ |
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123 | #elif ECB_C99 |
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124 | #define ecb_restrict restrict |
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125 | #else |
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126 | #define ecb_restrict |
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127 | #endif |
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128 | |
53 | typedef int ecb_bool; |
129 | typedef int ecb_bool; |
54 | # endif |
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55 | #endif |
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56 | |
130 | |
57 | #define ECB_CONCAT_(a, b) a ## b |
131 | #define ECB_CONCAT_(a, b) a ## b |
58 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
132 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
59 | #define ECB_STRINGIFY_(a) # a |
133 | #define ECB_STRINGIFY_(a) # a |
60 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
134 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
61 | |
135 | |
62 | #define ECB_HEADER_INLINE static ECB_INLINE |
136 | #define ecb_function_ ecb_inline |
63 | |
137 | |
64 | #if ECB_GCC_VERSION(3,1) |
138 | #if ECB_GCC_VERSION(3,1) |
65 | # define ecb_attribute(attrlist) __attribute__(attrlist) |
139 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
66 | # define ecb_is_constant(c) __builtin_constant_p (c) |
140 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
67 | # define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
141 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
68 | # define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
142 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
69 | #else |
143 | #else |
70 | # define ecb_attribute(attrlist) |
144 | #define ecb_attribute(attrlist) |
71 | # define ecb_is_constant(c) 0 |
145 | #define ecb_is_constant(expr) 0 |
72 | # define ecb_expect(expr,value) (expr) |
146 | #define ecb_expect(expr,value) (expr) |
73 | # define ecb_prefetch(addr,rw,locality) |
147 | #define ecb_prefetch(addr,rw,locality) |
74 | #endif |
148 | #endif |
75 | |
149 | |
76 | /* no emulation for ecb_decltype */ |
150 | /* no emulation for ecb_decltype */ |
77 | #if ECB_GCC_VERSION(4,5) |
151 | #if ECB_GCC_VERSION(4,5) |
78 | # define ecb_decltype(x) __decltype(x) |
152 | #define ecb_decltype(x) __decltype(x) |
79 | #elif ECB_GCC_VERSION(3,0) |
153 | #elif ECB_GCC_VERSION(3,0) |
80 | # define ecb_decltype(x) typeof(x) |
154 | #define ecb_decltype(x) __typeof(x) |
81 | #endif |
155 | #endif |
82 | |
156 | |
83 | #define ecb_noinline ecb_attribute ((noinline)) |
157 | #define ecb_noinline ecb_attribute ((__noinline__)) |
84 | #define ecb_noreturn ecb_attribute ((noreturn)) |
158 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
85 | #define ecb_unused ecb_attribute ((unused)) |
159 | #define ecb_unused ecb_attribute ((__unused__)) |
86 | #define ecb_const ecb_attribute ((const)) |
160 | #define ecb_const ecb_attribute ((__const__)) |
87 | #define ecb_pure ecb_attribute ((pure)) |
161 | #define ecb_pure ecb_attribute ((__pure__)) |
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162 | |
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163 | #if ECB_GCC_VERSION(4,3) |
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164 | #define ecb_artificial ecb_attribute ((__artificial__)) |
88 | #define ecb_hot ecb_attribute ((hot)) /* 4.3 */ |
165 | #define ecb_hot ecb_attribute ((__hot__)) |
89 | #define ecb_cold ecb_attribute ((cold)) /* 4.3 */ |
166 | #define ecb_cold ecb_attribute ((__cold__)) |
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167 | #else |
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168 | #define ecb_artificial |
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169 | #define ecb_hot |
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170 | #define ecb_cold |
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171 | #endif |
90 | |
172 | |
91 | /* put into ifs if you are very sure that the expression */ |
173 | /* put around conditional expressions if you are very sure that the */ |
92 | /* is mostly true or mosty false. note that these return */ |
174 | /* expression is mostly true or mostly false. note that these return */ |
93 | /* booleans, not the expression. */ |
175 | /* booleans, not the expression. */ |
94 | #define ecb_unlikely(expr) ecb_expect (!!(expr), 0) |
176 | #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
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177 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
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178 | /* for compatibility to the rest of the world */ |
95 | #define ecb_likely(expr) ecb_expect (!!(expr), 1) |
179 | #define ecb_likely(expr) ecb_expect_true (expr) |
96 | |
180 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
97 | /* try to tell the compiler that some condition is definitely true */ |
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98 | #define ecb_assume(cond) do { if (!(cond)) unreachable (); } while (0) |
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99 | |
181 | |
100 | /* count trailing zero bits and count # of one bits */ |
182 | /* count trailing zero bits and count # of one bits */ |
101 | #if ECB_GCC_VERSION(3,4) |
183 | #if ECB_GCC_VERSION(3,4) |
102 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) { return __builtin_ctz (x); } |
184 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
103 | ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) { return __builtin_popcount (x); } |
185 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
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186 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
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187 | #define ecb_ctz32(x) __builtin_ctz (x) |
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188 | #define ecb_ctz64(x) __builtin_ctzll (x) |
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189 | #define ecb_popcount32(x) __builtin_popcount (x) |
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190 | /* no popcountll */ |
104 | #else |
191 | #else |
105 | ECB_HEADER_INLINE |
192 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
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193 | ecb_function_ int |
106 | ecb_ctz32 (uint32_t x) ecb_const |
194 | ecb_ctz32 (uint32_t x) |
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195 | { |
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196 | int r = 0; |
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197 | |
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198 | x &= ~x + 1; /* this isolates the lowest bit */ |
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199 | |
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200 | #if ECB_branchless_on_i386 |
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201 | r += !!(x & 0xaaaaaaaa) << 0; |
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202 | r += !!(x & 0xcccccccc) << 1; |
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203 | r += !!(x & 0xf0f0f0f0) << 2; |
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204 | r += !!(x & 0xff00ff00) << 3; |
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205 | r += !!(x & 0xffff0000) << 4; |
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206 | #else |
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207 | if (x & 0xaaaaaaaa) r += 1; |
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208 | if (x & 0xcccccccc) r += 2; |
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209 | if (x & 0xf0f0f0f0) r += 4; |
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210 | if (x & 0xff00ff00) r += 8; |
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211 | if (x & 0xffff0000) r += 16; |
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212 | #endif |
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213 | |
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214 | return r; |
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215 | } |
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216 | |
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217 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
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218 | ecb_function_ int |
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219 | ecb_ctz64 (uint64_t x) |
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220 | { |
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221 | int shift = x & 0xffffffffU ? 0 : 32; |
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222 | return ecb_ctz32 (x >> shift) + shift; |
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223 | } |
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224 | |
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225 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
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226 | ecb_function_ int |
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227 | ecb_popcount32 (uint32_t x) |
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228 | { |
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229 | x -= (x >> 1) & 0x55555555; |
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230 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
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231 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
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232 | x *= 0x01010101; |
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233 | |
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234 | return x >> 24; |
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235 | } |
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236 | |
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237 | /* you have the choice beetween something with a table lookup, */ |
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238 | /* something using lots of bit arithmetic and a simple loop */ |
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239 | /* we went for the loop */ |
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240 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
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241 | ecb_function_ int ecb_ld32 (uint32_t x) |
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242 | { |
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243 | int r = 0; |
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244 | |
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245 | if (x >> 16) { x >>= 16; r += 16; } |
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246 | if (x >> 8) { x >>= 8; r += 8; } |
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247 | if (x >> 4) { x >>= 4; r += 4; } |
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248 | if (x >> 2) { x >>= 2; r += 2; } |
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249 | if (x >> 1) { r += 1; } |
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250 | |
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251 | return r; |
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252 | } |
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253 | |
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254 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
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255 | ecb_function_ int ecb_ld64 (uint64_t x) |
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256 | { |
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257 | int r = 0; |
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258 | |
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259 | if (x >> 32) { x >>= 32; r += 32; } |
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260 | |
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261 | return r + ecb_ld32 (x); |
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262 | } |
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263 | #endif |
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264 | |
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265 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
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266 | /* so for this version we are lazy */ |
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267 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
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268 | ecb_function_ int |
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269 | ecb_popcount64 (uint64_t x) |
107 | { |
270 | { |
108 | int r = 0; |
271 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
109 | |
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110 | x &= -x; /* this isolates the lowest bit */ |
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111 | |
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112 | if (x & 0xaaaaaaaa) r += 1; |
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113 | if (x & 0xcccccccc) r += 2; |
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114 | if (x & 0xf0f0f0f0) r += 4; |
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115 | if (x & 0xff00ff00) r += 8; |
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116 | if (x & 0xffff0000) r += 16; |
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117 | |
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118 | return r; |
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119 | } |
272 | } |
120 | |
273 | |
121 | ECB_HEADER_INLINE |
274 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
122 | ecb_popcount32 (uint32_t x) ecb_const |
275 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
123 | { |
276 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
124 | x -= (x >> 1) & 0x55555555; |
277 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
125 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
278 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
126 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
279 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
127 | x *= 0x01010101; |
280 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
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281 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
128 | |
282 | |
129 | return x >> 24; |
283 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
130 | } |
284 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
131 | #endif |
285 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
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286 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
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287 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
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288 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
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289 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
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290 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
132 | |
291 | |
133 | #if ECB_GCC_VERSION(4,3) |
292 | #if ECB_GCC_VERSION(4,3) |
134 | ECB_GCC_VERSION uint32_t ecb_bswap32 (uint32_t x) { return __builtin_bswap32 (x); } |
293 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
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294 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
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295 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
135 | #else |
296 | #else |
136 | ECB_GCC_VERSION uint32_t |
297 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
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298 | ecb_function_ uint16_t |
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299 | ecb_bswap16 (uint16_t x) |
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300 | { |
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301 | return ecb_rotl16 (x, 8); |
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302 | } |
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303 | |
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304 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
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305 | ecb_function_ uint32_t |
137 | ecb_bswap32 (uint32_t x) |
306 | ecb_bswap32 (uint32_t x) |
138 | { |
307 | { |
139 | return (x >> 24) |
308 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
140 | | ((x >> 8) & 0x0000ff00) |
309 | } |
141 | | ((x << 8) & 0x00ff0000) |
310 | |
142 | | (x << 24); |
311 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
143 | } |
312 | ecb_function_ uint64_t |
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313 | ecb_bswap64 (uint64_t x) |
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314 | { |
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315 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
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316 | } |
144 | #endif |
317 | #endif |
145 | |
318 | |
146 | #if ECB_GCC_VERSION(4,5) |
319 | #if ECB_GCC_VERSION(4,5) |
147 | # define ecb_unreachable() __builtin_unreachable () |
320 | #define ecb_unreachable() __builtin_unreachable () |
148 | #else |
321 | #else |
149 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
322 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
150 | ECB_HEADER_INLINE void ecb_unreachable () ecb_attribute ((noreturn)); |
323 | ecb_function_ void ecb_unreachable (void) ecb_noreturn; |
151 | ECB_HEADER_INLINE void ecb_unreachable () { } |
324 | ecb_function_ void ecb_unreachable (void) { } |
152 | #endif |
325 | #endif |
153 | |
326 | |
154 | ECB_HEADER_INLINE unsigned char |
327 | /* try to tell the compiler that some condition is definitely true */ |
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328 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
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329 | |
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330 | ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; |
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331 | ecb_function_ unsigned char |
155 | ecb_byteorder_helper () ecb_const |
332 | ecb_byteorder_helper (void) |
156 | { |
333 | { |
157 | const uint32_t u = 0x11223344; |
334 | const uint32_t u = 0x11223344; |
158 | return *(unsigned char *)&u; |
335 | return *(unsigned char *)&u; |
159 | } |
336 | } |
160 | |
337 | |
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338 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
161 | ECB_HEADER_INLINE ecb_bool ecb_big_endian () ecb_const { return ecb_byteorder_helper () == 0x11; }; |
339 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
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340 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
162 | ECB_HEADER_INLINE ecb_bool ecb_little_endian () ecb_const { return ecb_byteorder_helper () == 0x44; }; |
341 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
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342 | |
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343 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
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344 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
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345 | #else |
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346 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
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347 | #endif |
163 | |
348 | |
164 | #if ecb_cplusplus_does_not_suck |
349 | #if ecb_cplusplus_does_not_suck |
165 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
350 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
166 | template<typename T, int N> |
351 | template<typename T, int N> |
167 | static inline int ecb_array_length (const T (&arr)[N]) |
352 | static inline int ecb_array_length (const T (&arr)[N]) |
168 | { |
353 | { |
169 | return N; |
354 | return N; |
170 | } |
355 | } |
171 | #else |
356 | #else |
172 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
357 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
173 | #endif |
358 | #endif |
174 | |
359 | |
175 | ECB_INLINE uint32_t |
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176 | ecb_rotr32 (uint32_t x, unsigned int count) |
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177 | { |
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178 | return (x << (32 - count)) | (x >> count); |
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179 | } |
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180 | |
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181 | ECB_INLINE uint32_t |
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182 | ecb_rotl32 (uint32_t x, unsigned int count) |
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183 | { |
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184 | return (x >> (32 - count)) | (x << count); |
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185 | } |
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186 | |
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187 | #endif |
360 | #endif |
188 | |
361 | |