… | |
… | |
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 enourmous 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 | |
50 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
66 | #define ECB_C99 (__STDC_VERSION__ >= 199901L) |
51 | |
67 | |
52 | #if __cplusplus |
68 | #if __cplusplus |
53 | #define ECB_INLINE static inline |
69 | #define ecb_inline static inline |
54 | #elif ECB_GCC_VERSION(2,5) |
70 | #elif ECB_GCC_VERSION(2,5) |
55 | #define ECB_INLINE static __inline__ |
71 | #define ecb_inline static __inline__ |
56 | #elif ECB_C99 |
72 | #elif ECB_C99 |
57 | #define ECB_INLINE static inline |
73 | #define ecb_inline static inline |
58 | #else |
74 | #else |
59 | #define ECB_INLINE static |
75 | #define ecb_inline static |
60 | #endif |
76 | #endif |
61 | |
77 | |
62 | #if ECB_GCC_VERSION(3,3) |
78 | #if ECB_GCC_VERSION(3,3) |
63 | #define ecb_restrict __restrict__ |
79 | #define ecb_restrict __restrict__ |
64 | #elif ECB_C99 |
80 | #elif ECB_C99 |
… | |
… | |
72 | #define ECB_CONCAT_(a, b) a ## b |
88 | #define ECB_CONCAT_(a, b) a ## b |
73 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
89 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
74 | #define ECB_STRINGIFY_(a) # a |
90 | #define ECB_STRINGIFY_(a) # a |
75 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
91 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
76 | |
92 | |
77 | #define ecb_function_ ECB_INLINE |
93 | #define ecb_function_ ecb_inline |
78 | |
94 | |
79 | #if ECB_GCC_VERSION(3,1) |
95 | #if ECB_GCC_VERSION(3,1) |
80 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
96 | #define ecb_attribute(attrlist) __attribute__(attrlist) |
81 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
97 | #define ecb_is_constant(expr) __builtin_constant_p (expr) |
82 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
98 | #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) |
… | |
… | |
120 | #define ecb_likely(expr) ecb_expect_true (expr) |
136 | #define ecb_likely(expr) ecb_expect_true (expr) |
121 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
137 | #define ecb_unlikely(expr) ecb_expect_false (expr) |
122 | |
138 | |
123 | /* count trailing zero bits and count # of one bits */ |
139 | /* count trailing zero bits and count # of one bits */ |
124 | #if ECB_GCC_VERSION(3,4) |
140 | #if ECB_GCC_VERSION(3,4) |
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141 | /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */ |
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142 | #define ecb_ld32(x) (__builtin_clz (x) ^ 31) |
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143 | #define ecb_ld64(x) (__builtin_clzll (x) ^ 63) |
125 | #define ecb_ctz32(x) __builtin_ctz (x) |
144 | #define ecb_ctz32(x) __builtin_ctz (x) |
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145 | #define ecb_ctz64(x) __builtin_ctzll (x) |
126 | #define ecb_popcount32(x) __builtin_popcount (x) |
146 | #define ecb_popcount32(x) __builtin_popcount (x) |
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147 | /* no popcountll */ |
127 | #else |
148 | #else |
128 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
149 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
129 | ecb_function_ int |
150 | ecb_function_ int |
130 | ecb_ctz32 (uint32_t x) |
151 | ecb_ctz32 (uint32_t x) |
131 | { |
152 | { |
132 | int r = 0; |
153 | int r = 0; |
133 | |
154 | |
134 | x &= -x; /* this isolates the lowest bit */ |
155 | x &= ~x + 1; /* this isolates the lowest bit */ |
135 | |
156 | |
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157 | #if ECB_branchless_on_i386 |
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158 | r += !!(x & 0xaaaaaaaa) << 0; |
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159 | r += !!(x & 0xcccccccc) << 1; |
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160 | r += !!(x & 0xf0f0f0f0) << 2; |
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161 | r += !!(x & 0xff00ff00) << 3; |
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162 | r += !!(x & 0xffff0000) << 4; |
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163 | #else |
136 | if (x & 0xaaaaaaaa) r += 1; |
164 | if (x & 0xaaaaaaaa) r += 1; |
137 | if (x & 0xcccccccc) r += 2; |
165 | if (x & 0xcccccccc) r += 2; |
138 | if (x & 0xf0f0f0f0) r += 4; |
166 | if (x & 0xf0f0f0f0) r += 4; |
139 | if (x & 0xff00ff00) r += 8; |
167 | if (x & 0xff00ff00) r += 8; |
140 | if (x & 0xffff0000) r += 16; |
168 | if (x & 0xffff0000) r += 16; |
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169 | #endif |
141 | |
170 | |
142 | return r; |
171 | return r; |
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172 | } |
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173 | |
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174 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
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175 | ecb_function_ int |
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176 | ecb_ctz64 (uint64_t x) |
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177 | { |
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178 | int shift = x & 0xffffffffU ? 0 : 32; |
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179 | return ecb_ctz32 (x >> shift) + shift; |
143 | } |
180 | } |
144 | |
181 | |
145 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
182 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
146 | ecb_function_ int |
183 | ecb_function_ int |
147 | ecb_popcount32 (uint32_t x) |
184 | ecb_popcount32 (uint32_t x) |
… | |
… | |
151 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
188 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
152 | x *= 0x01010101; |
189 | x *= 0x01010101; |
153 | |
190 | |
154 | return x >> 24; |
191 | return x >> 24; |
155 | } |
192 | } |
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193 | |
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194 | /* you have the choice beetween something with a table lookup, */ |
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195 | /* something using lots of bit arithmetic and a simple loop */ |
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196 | /* we went for the loop */ |
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197 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
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198 | ecb_function_ int ecb_ld32 (uint32_t x) |
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199 | { |
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200 | int r = 0; |
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201 | |
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202 | if (x >> 16) { x >>= 16; r += 16; } |
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203 | if (x >> 8) { x >>= 8; r += 8; } |
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204 | if (x >> 4) { x >>= 4; r += 4; } |
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205 | if (x >> 2) { x >>= 2; r += 2; } |
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206 | if (x >> 1) { r += 1; } |
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207 | |
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208 | return r; |
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209 | } |
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210 | |
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211 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
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212 | ecb_function_ int ecb_ld64 (uint64_t x) |
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213 | { |
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214 | int r = 0; |
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215 | |
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216 | if (x >> 32) { x >>= 32; r += 32; } |
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217 | |
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218 | return r + ecb_ld32 (x); |
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219 | } |
156 | #endif |
220 | #endif |
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221 | |
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222 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
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223 | /* so for this version we are lazy */ |
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224 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
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225 | ecb_function_ int |
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226 | ecb_popcount64 (uint64_t x) |
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227 | { |
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228 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
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229 | } |
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230 | |
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231 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
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232 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
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233 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
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234 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
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235 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
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236 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
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237 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
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238 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
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239 | |
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240 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
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241 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
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242 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
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243 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
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244 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
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245 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
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246 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
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247 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
157 | |
248 | |
158 | #if ECB_GCC_VERSION(4,3) |
249 | #if ECB_GCC_VERSION(4,3) |
159 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
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160 | #define ecb_bswap16(x) (__builtin_bswap32(x) >> 16) |
250 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
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251 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
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252 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
161 | #else |
253 | #else |
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254 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
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255 | ecb_function_ uint16_t |
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256 | ecb_bswap16 (uint16_t x) |
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257 | { |
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258 | return ecb_rotl16 (x, 8); |
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259 | } |
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260 | |
162 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
261 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
163 | ecb_function_ uint32_t |
262 | ecb_function_ uint32_t |
164 | ecb_bswap32 (uint32_t x) |
263 | ecb_bswap32 (uint32_t x) |
165 | { |
264 | { |
166 | return (x >> 24) |
265 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
167 | | ((x >> 8) & 0x0000ff00) |
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168 | | ((x << 8) & 0x00ff0000) |
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169 | | (x << 24); |
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170 | } |
266 | } |
171 | |
267 | |
172 | ecb_function_ uint32_t ecb_bswap16 (uint32_t x) ecb_const; |
268 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
173 | ecb_function_ uint32_t |
269 | ecb_function_ uint64_t |
174 | ecb_bswap16 (uint32_t x) |
270 | ecb_bswap64 (uint64_t x) |
175 | { |
271 | { |
176 | return ((x >> 8) & 0xff) |
272 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
177 | | ((x << 8) & 0x00ff0000) |
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178 | | (x << 24); |
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179 | } |
273 | } |
180 | #endif |
274 | #endif |
181 | |
275 | |
182 | #if ECB_GCC_VERSION(4,5) |
276 | #if ECB_GCC_VERSION(4,5) |
183 | #define ecb_unreachable() __builtin_unreachable () |
277 | #define ecb_unreachable() __builtin_unreachable () |
… | |
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197 | const uint32_t u = 0x11223344; |
291 | const uint32_t u = 0x11223344; |
198 | return *(unsigned char *)&u; |
292 | return *(unsigned char *)&u; |
199 | } |
293 | } |
200 | |
294 | |
201 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
295 | ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; |
202 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }; |
296 | ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
203 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
297 | ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; |
204 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }; |
298 | ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
205 | |
299 | |
206 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
300 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
207 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
301 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
208 | #else |
302 | #else |
209 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
303 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
… | |
… | |
218 | } |
312 | } |
219 | #else |
313 | #else |
220 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
314 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
221 | #endif |
315 | #endif |
222 | |
316 | |
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 |
317 | #endif |
238 | |
318 | |