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Comparing libecb/ecb.h (file contents):
Revision 1.68 by sf-exg, Thu Aug 25 16:06:08 2011 UTC vs.
Revision 1.76 by root, Wed Jan 25 20:23:12 2012 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
5 * Copyright (©) 2011 Emanuele Giaquinta 5 * Copyright (©) 2011 Emanuele Giaquinta
6 * All rights reserved. 6 * All rights reserved.
7 * 7 *
8 * Redistribution and use in source and binary forms, with or without modifica- 8 * Redistribution and use in source and binary forms, with or without modifica-
9 * tion, are permitted provided that the following conditions are met: 9 * tion, are permitted provided that the following conditions are met:
… …
71#if ECB_NO_THREADS || ECB_NO_SMP 71#if ECB_NO_THREADS || ECB_NO_SMP
72 #define ECB_MEMORY_FENCE do { } while (0) 72 #define ECB_MEMORY_FENCE do { } while (0)
73#endif 73#endif
74 74
75#ifndef ECB_MEMORY_FENCE 75#ifndef ECB_MEMORY_FENCE
76 #if ECB_GCC_VERSION(2,5) 76 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
77 #if __i386__ 77 #if __i386 || __i386__
78 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 78 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
79 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 79 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
80 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 80 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
81 #elif __amd64 81 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
82 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 82 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
83 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 83 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
84 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 84 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
85 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 85 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
… …
88 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) 88 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
89 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 89 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
90 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ 90 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
91 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) 91 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
92 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 92 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
93 #elif __sparc || __sparc__
94 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
95 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
96 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
93 #endif 97 #endif
94 #endif 98 #endif
95#endif 99#endif
96 100
97#ifndef ECB_MEMORY_FENCE 101#ifndef ECB_MEMORY_FENCE
98 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) 102 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
99 #define ECB_MEMORY_FENCE __sync_synchronize () 103 #define ECB_MEMORY_FENCE __sync_synchronize ()
100 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 104 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
101 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 105 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
102 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 106 #elif _MSC_VER >= 1400 /* VC++ 2005 */
103 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 107 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
… …
105 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 109 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
106 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 110 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
107 #elif defined(_WIN32) 111 #elif defined(_WIN32)
108 #include <WinNT.h> 112 #include <WinNT.h>
109 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 113 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
114 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
115 #include <mbarrier.h>
116 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
117 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
118 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
110 #endif 119 #endif
111#endif 120#endif
112 121
113#ifndef ECB_MEMORY_FENCE 122#ifndef ECB_MEMORY_FENCE
114 #if !ECB_AVOID_PTHREADS 123 #if !ECB_AVOID_PTHREADS
… …
289 298
290 return r + ecb_ld32 (x); 299 return r + ecb_ld32 (x);
291 } 300 }
292#endif 301#endif
293 302
303ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
304ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
305{
306 return ( (x * 0x0802U & 0x22110U)
307 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
308}
309
310ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
311ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
312{
313 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
314 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
315 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
316 x = ( x >> 8 ) | ( x << 8);
317
318 return x;
319}
320
321ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
322ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
323{
324 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
325 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
326 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
327 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
328 x = ( x >> 16 ) | ( x << 16);
329
330 return x;
331}
332
294/* popcount64 is only available on 64 bit cpus as gcc builtin */ 333/* popcount64 is only available on 64 bit cpus as gcc builtin */
295/* so for this version we are lazy */ 334/* so for this version we are lazy */
296ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 335ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
297ecb_function_ int 336ecb_function_ int
298ecb_popcount64 (uint64_t x) 337ecb_popcount64 (uint64_t x)
… …
347 386
348#if ECB_GCC_VERSION(4,5) 387#if ECB_GCC_VERSION(4,5)
349 #define ecb_unreachable() __builtin_unreachable () 388 #define ecb_unreachable() __builtin_unreachable ()
350#else 389#else
351 /* this seems to work fine, but gcc always emits a warning for it :/ */ 390 /* this seems to work fine, but gcc always emits a warning for it :/ */
352 ecb_function_ void ecb_unreachable (void) ecb_noreturn; 391 ecb_inline void ecb_unreachable (void) ecb_noreturn;
353 ecb_function_ void ecb_unreachable (void) { } 392 ecb_inline void ecb_unreachable (void) { }
354#endif 393#endif
355 394
356/* try to tell the compiler that some condition is definitely true */ 395/* try to tell the compiler that some condition is definitely true */
357#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 396#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
358 397
359ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; 398ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
360ecb_function_ unsigned char 399ecb_inline unsigned char
361ecb_byteorder_helper (void) 400ecb_byteorder_helper (void)
362{ 401{
363 const uint32_t u = 0x11223344; 402 const uint32_t u = 0x11223344;
364 return *(unsigned char *)&u; 403 return *(unsigned char *)&u;
365} 404}
366 405
367ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; 406ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
368ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 407ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
369ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; 408ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
370ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 409ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
371 410
372#if ECB_GCC_VERSION(3,0) || ECB_C99 411#if ECB_GCC_VERSION(3,0) || ECB_C99
373 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 412 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
374#else 413#else
375 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 414 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))

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