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66 | /*****************************************************************************/ |
66 | /*****************************************************************************/ |
67 | |
67 | |
68 | #ifndef ECB_MEMORY_FENCE |
68 | #ifndef ECB_MEMORY_FENCE |
69 | #if ECB_GCC_VERSION(2,5) |
69 | #if ECB_GCC_VERSION(2,5) |
70 | #if __x86 |
70 | #if __x86 |
71 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; or.b $0, -1(%%esp)" : : : "memory") |
71 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
72 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
72 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
73 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */ |
73 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */ |
74 | #elif __amd64 |
74 | #elif __amd64 |
75 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
75 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
76 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
76 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
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82 | #ifndef ECB_MEMORY_FENCE |
82 | #ifndef ECB_MEMORY_FENCE |
83 | #if ECB_GCC_VERSION(4,4) |
83 | #if ECB_GCC_VERSION(4,4) |
84 | #define ECB_MEMORY_FENCE __sync_synchronize () |
84 | #define ECB_MEMORY_FENCE __sync_synchronize () |
85 | #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) |
85 | #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) |
86 | #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) |
86 | #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) |
87 | #elif _MSC_VER >= 1400 |
87 | #elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */ |
88 | #define ECB_MEMORY_FENCE do { } while (0) |
88 | #define ECB_MEMORY_FENCE do { } while (0) |
89 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
89 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
90 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
90 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
91 | #elif defined(_WIN32) && defined(MemoryBarrier) |
91 | #elif defined(_WIN32) |
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92 | #include <WinNT.h> |
92 | #define ECB_MEMORY_FENCE MemoryBarrier () |
93 | #define ECB_MEMORY_FENCE MemoryBarrier () |
93 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
94 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
94 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
95 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
95 | #endif |
96 | #endif |
96 | #endif |
97 | #endif |
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232 | x *= 0x01010101; |
233 | x *= 0x01010101; |
233 | |
234 | |
234 | return x >> 24; |
235 | return x >> 24; |
235 | } |
236 | } |
236 | |
237 | |
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; |
238 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
241 | ecb_function_ int ecb_ld32 (uint32_t x) |
239 | ecb_function_ int ecb_ld32 (uint32_t x) |
242 | { |
240 | { |
243 | int r = 0; |
241 | int r = 0; |
244 | |
242 | |