| … | |
… | |
| 289 | |
289 | |
| 290 | return r + ecb_ld32 (x); |
290 | return r + ecb_ld32 (x); |
| 291 | } |
291 | } |
| 292 | #endif |
292 | #endif |
| 293 | |
293 | |
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294 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
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295 | { |
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296 | return ( (x * 0x0802U & 0x22110U) |
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297 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
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298 | } |
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299 | |
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300 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
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301 | { |
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302 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
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303 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
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304 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
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305 | x = ( x >> 8 ) | ( x << 8); |
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306 | |
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307 | return x; |
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308 | } |
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309 | |
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310 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
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311 | { |
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312 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
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313 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
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314 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
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315 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
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316 | x = ( x >> 16 ) | ( x << 16); |
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317 | |
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318 | return x; |
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319 | } |
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320 | |
| 294 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
321 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
| 295 | /* so for this version we are lazy */ |
322 | /* so for this version we are lazy */ |
| 296 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
323 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
| 297 | ecb_function_ int |
324 | ecb_function_ int |
| 298 | ecb_popcount64 (uint64_t x) |
325 | ecb_popcount64 (uint64_t x) |
