| … | |
… | |
| 38 | * or so. |
38 | * or so. |
| 39 | * we try to detect these and simply assume they are not gcc - if they have |
39 | * 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. |
40 | * an issue with that they should have done it right in the first place. |
| 41 | */ |
41 | */ |
| 42 | #ifndef ECB_GCC_VERSION |
42 | #ifndef ECB_GCC_VERSION |
| 43 | # if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
43 | #if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
| 44 | # define ECB_GCC_VERSION(major,minor) 0 |
44 | #define ECB_GCC_VERSION(major,minor) 0 |
| 45 | # else |
45 | #else |
| 46 | # define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
46 | #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) |
| 47 | # endif |
47 | #endif |
| 48 | #endif |
48 | #endif |
| 49 | |
49 | |
| 50 | #ifndef __cplusplus |
50 | #ifndef __cplusplus |
| 51 | # if __STDC_VERSION__ >= 199901L |
51 | #if __STDC_VERSION__ >= 199901L |
| 52 | # define ECB_INLINE inline |
52 | #define ECB_INLINE static inline |
| 53 | typedef _Bool ecb_bool; |
53 | typedef _Bool ecb_bool; |
| 54 | # else |
54 | #else |
| 55 | # define ECB_INLINE inline /* yeah! */ |
55 | #define ECB_INLINE static inline /* we assume the extension is ubiquituous, please tell us when we are wrong, or upgrade to the GCC */ |
| 56 | typedef int ecb_bool; |
56 | typedef int ecb_bool; |
| 57 | # endif |
57 | #endif |
| 58 | #else |
58 | #else |
| 59 | # define ECB_INLINE inline |
59 | #define ECB_INLINE static inline |
| 60 | typedef bool ecb_bool; |
60 | typedef bool ecb_bool; |
| 61 | #endif |
61 | #endif |
| 62 | |
62 | |
| 63 | #define ECB_CONCAT_(a, b) a ## b |
63 | #define ECB_CONCAT_(a, b) a ## b |
| 64 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
64 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
| 65 | #define ECB_STRINGIFY_(a) # a |
65 | #define ECB_STRINGIFY_(a) # a |
| 66 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
66 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
| 67 | |
67 | |
| 68 | #define ECB_HEADER_INLINE static ECB_INLINE |
68 | #define ECB_HEADER_INLINE ECB_INLINE |
| 69 | |
69 | |
| 70 | #if ECB_GCC_VERSION(3,1) |
70 | #if ECB_GCC_VERSION(3,1) |
| 71 | # define ecb_attribute(attrlist) __attribute__(attrlist) |
71 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
| 72 | # define ecb_is_constant(expr) __builtin_constant_p (expr) |
72 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
| 73 | # define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
73 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
| 74 | # define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
74 | #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
| 75 | #else |
75 | #else |
| 76 | # define ecb_attribute(attrlist) |
76 | #define ecb_attribute(attrlist) |
| 77 | # define ecb_is_constant(expr) 0 |
77 | #define ecb_is_constant(expr) 0 |
| 78 | # define ecb_expect(expr,value) (expr) |
78 | #define ecb_expect(expr,value) (expr) |
| 79 | # define ecb_prefetch(addr,rw,locality) |
79 | #define ecb_prefetch(addr,rw,locality) |
| 80 | #endif |
80 | #endif |
| 81 | |
81 | |
| 82 | /* no emulation for ecb_decltype */ |
82 | /* no emulation for ecb_decltype */ |
| 83 | #if ECB_GCC_VERSION(4,5) |
83 | #if ECB_GCC_VERSION(4,5) |
| 84 | # define ecb_decltype(x) __decltype(x) |
84 | #define ecb_decltype(x) __decltype(x) |
| 85 | #elif ECB_GCC_VERSION(3,0) |
85 | #elif ECB_GCC_VERSION(3,0) |
| 86 | # define ecb_decltype(x) typeof(x) |
86 | #define ecb_decltype(x) typeof(x) |
| 87 | #endif |
87 | #endif |
| 88 | |
88 | |
| 89 | #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */ |
|
|
| 90 | #define ecb_noinline ecb_attribute ((__noinline__)) |
89 | #define ecb_noinline ecb_attribute ((__noinline__)) |
| 91 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
90 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
| 92 | #define ecb_unused ecb_attribute ((__unused__)) |
91 | #define ecb_unused ecb_attribute ((__unused__)) |
| 93 | #define ecb_const ecb_attribute ((__const__)) |
92 | #define ecb_const ecb_attribute ((__const__)) |
| 94 | #define ecb_pure ecb_attribute ((__pure__)) |
93 | #define ecb_pure ecb_attribute ((__pure__)) |
|
|
94 | |
|
|
95 | #if ECB_GCC_VERSION(4,3) |
|
|
96 | #define ecb_artificial ecb_attribute ((__artificial__)) /* 4.3 */ |
| 95 | #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ |
97 | #define ecb_hot ecb_attribute ((__hot__)) /* 4.3 */ |
| 96 | #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ |
98 | #define ecb_cold ecb_attribute ((__cold__)) /* 4.3 */ |
|
|
99 | #else |
|
|
100 | #define ecb_artificial |
|
|
101 | #define ecb_hot |
|
|
102 | #define ecb_cold |
|
|
103 | #endif |
| 97 | |
104 | |
| 98 | /* put into if's if you are very sure that the expression */ |
105 | /* put into if's if you are very sure that the expression */ |
| 99 | /* is mostly true or mosty false. note that these return */ |
106 | /* is mostly true or mostly false. note that these return */ |
| 100 | /* booleans, not the expression. */ |
107 | /* booleans, not the expression. */ |
| 101 | #define ecb_unlikely(expr) ecb_expect (!!(expr), 0) |
108 | #define ecb_expect_false(expr) ecb_expect (!!(expr), 0) |
|
|
109 | #define ecb_expect_true(expr) ecb_expect (!!(expr), 1) |
|
|
110 | /* for compatibility to the rest of the world */ |
| 102 | #define ecb_likely(expr) ecb_expect (!!(expr), 1) |
111 | #define ecb_likely(expr) ecb_expect_true (expr) |
|
|
112 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
| 103 | |
113 | |
| 104 | /* try to tell the compiler that some condition is definitely true */ |
114 | /* try to tell the compiler that some condition is definitely true */ |
| 105 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
115 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
| 106 | |
116 | |
| 107 | /* count trailing zero bits and count # of one bits */ |
117 | /* count trailing zero bits and count # of one bits */ |
| 108 | #if ECB_GCC_VERSION(3,4) |
118 | #if ECB_GCC_VERSION(3,4) |
| 109 | #define ecb_ctz32(x) __builtin_ctz (x) |
119 | #define ecb_ctz32(x) __builtin_ctz (x) |
| 110 | #define ecb_popcount32(x) __builtin_popcount (x) |
120 | #define ecb_popcount32(x) __builtin_popcount (x) |
| 111 | #else |
121 | #else |
| 112 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
122 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
| 113 | ECB_HEADER_INLINE |
123 | ECB_HEADER_INLINE int |
| 114 | ecb_ctz32 (uint32_t x) |
124 | ecb_ctz32 (uint32_t x) |
| 115 | { |
125 | { |
| 116 | int r = 0; |
126 | int r = 0; |
| 117 | |
127 | |
| 118 | x &= -x; /* this isolates the lowest bit */ |
128 | x &= -x; /* this isolates the lowest bit */ |
| 119 | |
129 | |
| 120 | if (x & 0xaaaaaaaa) r += 1; |
130 | if (x & 0xaaaaaaaa) r += 1; |
| 121 | if (x & 0xcccccccc) r += 2; |
131 | if (x & 0xcccccccc) r += 2; |
| 122 | if (x & 0xf0f0f0f0) r += 4; |
132 | if (x & 0xf0f0f0f0) r += 4; |
| 123 | if (x & 0xff00ff00) r += 8; |
133 | if (x & 0xff00ff00) r += 8; |
| 124 | if (x & 0xffff0000) r += 16; |
134 | if (x & 0xffff0000) r += 16; |
| 125 | |
135 | |
| 126 | return r; |
136 | return r; |
| 127 | } |
137 | } |
| 128 | |
138 | |
| 129 | ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; |
139 | ECB_HEADER_INLINE int ecb_popcount32 (uint32_t x) ecb_const; |
| 130 | ECB_HEADER_INLINE |
140 | ECB_HEADER_INLINE int |
| 131 | ecb_popcount32 (uint32_t x) |
141 | ecb_popcount32 (uint32_t x) |
| 132 | { |
142 | { |
| 133 | x -= (x >> 1) & 0x55555555; |
143 | x -= (x >> 1) & 0x55555555; |
| 134 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
144 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
| 135 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
145 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
| 136 | x *= 0x01010101; |
146 | x *= 0x01010101; |
| 137 | |
147 | |
| 138 | return x >> 24; |
148 | return x >> 24; |
| 139 | } |
149 | } |
| 140 | #endif |
150 | #endif |
| 141 | |
151 | |
| 142 | #if ECB_GCC_VERSION(4,3) |
152 | #if ECB_GCC_VERSION(4,3) |
| 143 | # define ecb_bswap32(x) __builtin_bswap32 (x) |
153 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
| 144 | # define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
154 | #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
| 145 | #else |
155 | #else |
| 146 | ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
156 | ECB_HEADER_INLINE uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
| 147 | ECB_HEADER_INLINE uint32_t |
157 | ECB_HEADER_INLINE uint32_t |
| 148 | ecb_bswap32 (uint32_t x) |
158 | ecb_bswap32 (uint32_t x) |
| 149 | { |
159 | { |
| 150 | return (x >> 24) |
160 | return (x >> 24) |
| 151 | | ((x >> 8) & 0x0000ff00) |
161 | | ((x >> 8) & 0x0000ff00) |
| 152 | | ((x << 8) & 0x00ff0000) |
162 | | ((x << 8) & 0x00ff0000) |
| 153 | | (x << 24); |
163 | | (x << 24); |
| 154 | } |
164 | } |
| 155 | |
165 | |
| 156 | ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
166 | ECB_HEADER_INLINE uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
| 157 | ECB_HEADER_INLINE uint32_t |
167 | ECB_HEADER_INLINE uint32_t |
| 158 | ecb_bswap16 (uint32_t x) |
168 | ecb_bswap16 (uint32_t x) |
| 159 | { |
169 | { |
| 160 | return ((x >> 8) & 0xff) |
170 | return ((x >> 8) & 0xff) |
| 161 | | ((x << 8) & 0x00ff0000) |
171 | | ((x << 8) & 0x00ff0000) |
| 162 | | (x << 24); |
172 | | (x << 24); |
| 163 | } |
173 | } |
| 164 | #endif |
174 | #endif |
| 165 | |
175 | |
| 166 | #if ECB_GCC_VERSION(4,5) |
176 | #if ECB_GCC_VERSION(4,5) |
| 167 | # define ecb_unreachable() __builtin_unreachable () |
177 | #define ecb_unreachable() __builtin_unreachable () |
| 168 | #else |
178 | #else |
| 169 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
179 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
| 170 | ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; |
180 | ECB_HEADER_INLINE void ecb_unreachable (void) ecb_noreturn; |
| 171 | ECB_HEADER_INLINE void ecb_unreachable (void) { } |
181 | ECB_HEADER_INLINE void ecb_unreachable (void) { } |
| 172 | #endif |
182 | #endif |
| 173 | |
183 | |
| 174 | ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; |
184 | ECB_HEADER_INLINE unsigned char ecb_byteorder_helper (void) ecb_const; |
| 175 | ECB_HEADER_INLINE unsigned char |
185 | ECB_HEADER_INLINE unsigned char |
| 176 | ecb_byteorder_helper (void) |
186 | ecb_byteorder_helper (void) |
| … | |
… | |
| 183 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
193 | ECB_HEADER_INLINE ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
| 184 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; |
194 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) ecb_const; |
| 185 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
195 | ECB_HEADER_INLINE ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
| 186 | |
196 | |
| 187 | #if ECB_GCC_VERSION(3,0) |
197 | #if ECB_GCC_VERSION(3,0) |
| 188 | # define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
198 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
| 189 | #else |
199 | #else |
| 190 | # define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
200 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
| 191 | #endif |
201 | #endif |
| 192 | |
202 | |
| 193 | #if ecb_cplusplus_does_not_suck |
203 | #if ecb_cplusplus_does_not_suck |
| 194 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
204 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
| 195 | template<typename T, int N> |
205 | template<typename T, int N> |
| 196 | static inline int ecb_array_length (const T (&arr)[N]) |
206 | static inline int ecb_array_length (const T (&arr)[N]) |
| 197 | { |
207 | { |
| 198 | return N; |
208 | return N; |
| 199 | } |
209 | } |
| 200 | #else |
210 | #else |
| 201 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
211 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
| 202 | #endif |
212 | #endif |
| 203 | |
213 | |
| 204 | ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
214 | ECB_INLINE uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
| 205 | ECB_INLINE uint32_t |
215 | ECB_INLINE uint32_t |
| 206 | ecb_rotr32 (uint32_t x, unsigned int count) |
216 | ecb_rotr32 (uint32_t x, unsigned int count) |
