… | |
… | |
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 in return for some better fake benchmark numbers. |
53 | * causing enormous grief in return for some better fake benchmark numbers. |
38 | * or so. |
54 | * or so. |
39 | * 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 |
40 | * 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. |
41 | */ |
57 | */ |
42 | #ifndef ECB_GCC_VERSION |
58 | #ifndef ECB_GCC_VERSION |
43 | #if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
59 | #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) |
44 | #define ECB_GCC_VERSION(major,minor) 0 |
60 | #define ECB_GCC_VERSION(major,minor) 0 |
45 | #else |
61 | #else |
46 | #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))) |
47 | #endif |
63 | #endif |
48 | #endif |
64 | #endif |
49 | |
65 | |
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66 | /*****************************************************************************/ |
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67 | |
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68 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
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69 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
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70 | |
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71 | #if ECB_NO_THREADS || ECB_NO_SMP |
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72 | #define ECB_MEMORY_FENCE do { } while (0) |
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73 | #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0) |
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74 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) |
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75 | #endif |
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76 | |
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77 | #ifndef ECB_MEMORY_FENCE |
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78 | #if ECB_GCC_VERSION(2,5) |
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79 | #if __x86 |
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80 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
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81 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ |
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82 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
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83 | #elif __amd64 |
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84 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
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85 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
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86 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
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87 | #endif |
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88 | #endif |
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89 | #endif |
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90 | |
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91 | #ifndef ECB_MEMORY_FENCE |
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92 | #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) |
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93 | #define ECB_MEMORY_FENCE __sync_synchronize () |
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94 | #define ECB_MEMORY_FENCE_ACQUIRE __sync_synchronize () /* ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ |
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95 | #define ECB_MEMORY_FENCE_RELEASE __sync_synchronize () /* ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ |
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96 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
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97 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
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98 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
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99 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
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100 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
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101 | #elif defined(_WIN32) |
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102 | #include <WinNT.h> |
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103 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
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104 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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105 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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106 | #endif |
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107 | #endif |
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108 | |
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109 | #ifndef ECB_MEMORY_FENCE |
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110 | /* |
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111 | * if you get undefined symbol references to pthread_mutex_lock, |
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112 | * or failure to find pthread.h, then you should implement |
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113 | * the ECB_MEMORY_FENCE operations for your cpu/compiler |
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114 | * OR provide pthread.h and link against the posix thread library |
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115 | * of your system. |
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116 | */ |
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117 | #include <pthread.h> |
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118 | #define ECB_NEEDS_PTHREADS 1 |
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119 | #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
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120 | |
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121 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
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122 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
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123 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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124 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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125 | #endif |
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126 | |
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127 | /*****************************************************************************/ |
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128 | |
50 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
129 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
51 | |
130 | |
52 | #if __cplusplus |
131 | #if __cplusplus |
53 | #define ECB_INLINE static inline |
132 | #define ecb_inline static inline |
54 | #elif ECB_GCC_VERSION(2,5) |
133 | #elif ECB_GCC_VERSION(2,5) |
55 | #define ECB_INLINE static __inline__ |
134 | #define ecb_inline static __inline__ |
56 | #elif ECB_C99 |
135 | #elif ECB_C99 |
57 | #define ECB_INLINE static inline |
136 | #define ecb_inline static inline |
58 | #else |
137 | #else |
59 | #define ECB_INLINE static |
138 | #define ecb_inline static |
60 | #endif |
139 | #endif |
61 | |
140 | |
62 | #if ECB_GCC_VERSION(3,3) |
141 | #if ECB_GCC_VERSION(3,3) |
63 | #define ecb_restrict __restrict__ |
142 | #define ecb_restrict __restrict__ |
64 | #elif ECB_C99 |
143 | #elif ECB_C99 |
… | |
… | |
72 | #define ECB_CONCAT_(a, b) a ## b |
151 | #define ECB_CONCAT_(a, b) a ## b |
73 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
152 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
74 | #define ECB_STRINGIFY_(a) # a |
153 | #define ECB_STRINGIFY_(a) # a |
75 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
154 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
76 | |
155 | |
77 | #define ecb_function_ ECB_INLINE |
156 | #define ecb_function_ ecb_inline |
78 | |
157 | |
79 | #if ECB_GCC_VERSION(3,1) |
158 | #if ECB_GCC_VERSION(3,1) |
80 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
159 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
81 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
160 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
82 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
161 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
… | |
… | |
118 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
197 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
119 | /* for compatibility to the rest of the world */ |
198 | /* for compatibility to the rest of the world */ |
120 | #define ecb_likely(expr) ecb_expect_true (expr) |
199 | #define ecb_likely(expr) ecb_expect_true (expr) |
121 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
200 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
122 | |
201 | |
123 | /* try to tell the compiler that some condition is definitely true */ |
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124 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
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125 | |
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126 | /* count trailing zero bits and count # of one bits */ |
202 | /* count trailing zero bits and count # of one bits */ |
127 | #if ECB_GCC_VERSION(3,4) |
203 | #if ECB_GCC_VERSION(3,4) |
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204 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
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205 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
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206 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
128 | #define ecb_ctz32(x) __builtin_ctz (x) |
207 | #define ecb_ctz32(x) __builtin_ctz (x) |
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208 | #define ecb_ctz64(x) __builtin_ctzll (x) |
129 | #define ecb_popcount32(x) __builtin_popcount (x) |
209 | #define ecb_popcount32(x) __builtin_popcount (x) |
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210 | /* no popcountll */ |
130 | #else |
211 | #else |
131 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
212 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
132 | ecb_function_ int |
213 | ecb_function_ int |
133 | ecb_ctz32 (uint32_t x) |
214 | ecb_ctz32 (uint32_t x) |
134 | { |
215 | { |
135 | int r = 0; |
216 | int r = 0; |
136 | |
217 | |
137 | x &= -x; /* this isolates the lowest bit */ |
218 | x &= ~x + 1; /* this isolates the lowest bit */ |
138 | |
219 | |
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220 | #if ECB_branchless_on_i386 |
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221 | r += !!(x & 0xaaaaaaaa) << 0; |
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222 | r += !!(x & 0xcccccccc) << 1; |
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223 | r += !!(x & 0xf0f0f0f0) << 2; |
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224 | r += !!(x & 0xff00ff00) << 3; |
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225 | r += !!(x & 0xffff0000) << 4; |
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226 | #else |
139 | if (x & 0xaaaaaaaa) r += 1; |
227 | if (x & 0xaaaaaaaa) r += 1; |
140 | if (x & 0xcccccccc) r += 2; |
228 | if (x & 0xcccccccc) r += 2; |
141 | if (x & 0xf0f0f0f0) r += 4; |
229 | if (x & 0xf0f0f0f0) r += 4; |
142 | if (x & 0xff00ff00) r += 8; |
230 | if (x & 0xff00ff00) r += 8; |
143 | if (x & 0xffff0000) r += 16; |
231 | if (x & 0xffff0000) r += 16; |
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232 | #endif |
144 | |
233 | |
145 | return r; |
234 | return r; |
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235 | } |
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236 | |
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237 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
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238 | ecb_function_ int |
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239 | ecb_ctz64 (uint64_t x) |
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240 | { |
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241 | int shift = x & 0xffffffffU ? 0 : 32; |
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242 | return ecb_ctz32 (x >> shift) + shift; |
146 | } |
243 | } |
147 | |
244 | |
148 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
245 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
149 | ecb_function_ int |
246 | ecb_function_ int |
150 | ecb_popcount32 (uint32_t x) |
247 | ecb_popcount32 (uint32_t x) |
… | |
… | |
154 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
251 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
155 | x *= 0x01010101; |
252 | x *= 0x01010101; |
156 | |
253 | |
157 | return x >> 24; |
254 | return x >> 24; |
158 | } |
255 | } |
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256 | |
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257 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
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258 | ecb_function_ int ecb_ld32 (uint32_t x) |
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259 | { |
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260 | int r = 0; |
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261 | |
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262 | if (x >> 16) { x >>= 16; r += 16; } |
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263 | if (x >> 8) { x >>= 8; r += 8; } |
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264 | if (x >> 4) { x >>= 4; r += 4; } |
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265 | if (x >> 2) { x >>= 2; r += 2; } |
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266 | if (x >> 1) { r += 1; } |
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267 | |
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268 | return r; |
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269 | } |
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270 | |
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271 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
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272 | ecb_function_ int ecb_ld64 (uint64_t x) |
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273 | { |
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274 | int r = 0; |
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275 | |
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276 | if (x >> 32) { x >>= 32; r += 32; } |
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277 | |
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278 | return r + ecb_ld32 (x); |
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279 | } |
159 | #endif |
280 | #endif |
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281 | |
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282 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
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283 | /* so for this version we are lazy */ |
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284 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
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285 | ecb_function_ int |
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286 | ecb_popcount64 (uint64_t x) |
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287 | { |
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288 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
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289 | } |
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290 | |
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291 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
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292 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
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293 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
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294 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
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295 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
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296 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
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297 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
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298 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
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299 | |
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300 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
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301 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
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302 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
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303 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
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304 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
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305 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
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306 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
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307 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
160 | |
308 | |
161 | #if ECB_GCC_VERSION(4,3) |
309 | #if ECB_GCC_VERSION(4,3) |
162 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
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163 | #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
310 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
|
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311 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
|
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312 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
164 | #else |
313 | #else |
|
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314 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
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315 | ecb_function_ uint16_t |
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316 | ecb_bswap16 (uint16_t x) |
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317 | { |
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318 | return ecb_rotl16 (x, 8); |
|
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319 | } |
|
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320 | |
165 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
321 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
166 | ecb_function_ uint32_t |
322 | ecb_function_ uint32_t |
167 | ecb_bswap32 (uint32_t x) |
323 | ecb_bswap32 (uint32_t x) |
168 | { |
324 | { |
169 | return (x >> 24) |
325 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
170 | | ((x >> 8) & 0x0000ff00) |
|
|
171 | | ((x << 8) & 0x00ff0000) |
|
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172 | | (x << 24); |
|
|
173 | } |
326 | } |
174 | |
327 | |
175 | ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
328 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
176 | ecb_function_ uint32_t |
329 | ecb_function_ uint64_t |
177 | ecb_bswap16 (uint32_t x) |
330 | ecb_bswap64 (uint64_t x) |
178 | { |
331 | { |
179 | return ((x >> 8) & 0xff) |
332 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
180 | | ((x << 8) & 0x00ff0000) |
|
|
181 | | (x << 24); |
|
|
182 | } |
333 | } |
183 | #endif |
334 | #endif |
184 | |
335 | |
185 | #if ECB_GCC_VERSION(4,5) |
336 | #if ECB_GCC_VERSION(4,5) |
186 | #define ecb_unreachable() __builtin_unreachable () |
337 | #define ecb_unreachable() __builtin_unreachable () |
187 | #else |
338 | #else |
188 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
339 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
189 | ecb_function_ void ecb_unreachable (void) ecb_noreturn; |
340 | ecb_function_ void ecb_unreachable (void) ecb_noreturn; |
190 | ecb_function_ void ecb_unreachable (void) { } |
341 | ecb_function_ void ecb_unreachable (void) { } |
191 | #endif |
342 | #endif |
|
|
343 | |
|
|
344 | /* try to tell the compiler that some condition is definitely true */ |
|
|
345 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
192 | |
346 | |
193 | ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; |
347 | ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; |
194 | ecb_function_ unsigned char |
348 | ecb_function_ unsigned char |
195 | ecb_byteorder_helper (void) |
349 | ecb_byteorder_helper (void) |
196 | { |
350 | { |
197 | const uint32_t u = 0x11223344; |
351 | const uint32_t u = 0x11223344; |
198 | return *(unsigned char *)&u; |
352 | return *(unsigned char *)&u; |
199 | } |
353 | } |
200 | |
354 | |
201 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
355 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
202 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
356 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
203 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
357 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
204 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
358 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
205 | |
359 | |
206 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
360 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
207 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
361 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
208 | #else |
362 | #else |
209 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
363 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
… | |
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218 | } |
372 | } |
219 | #else |
373 | #else |
220 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
374 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
221 | #endif |
375 | #endif |
222 | |
376 | |
223 | ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
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224 | ECB_INLINE uint32_t |
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225 | ecb_rotr32 (uint32_t x, unsigned int count) |
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226 | { |
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227 | return (x << (32 - count)) | (x >> count); |
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228 | } |
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229 | |
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230 | ECB_INLINE uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
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231 | ECB_INLINE uint32_t |
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232 | ecb_rotl32 (uint32_t x, unsigned int count) |
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233 | { |
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234 | return (x >> (32 - count)) | (x << count); |
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235 | } |
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236 | |
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237 | #endif |
377 | #endif |
238 | |
378 | |