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Comparing libecb/ecb.h (file contents):
Revision 1.63 by root, Thu Aug 4 14:37:46 2011 UTC vs.
Revision 1.83 by root, Sat Mar 24 19:38:33 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:
… …
66/*****************************************************************************/ 66/*****************************************************************************/
67 67
68/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 68/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
69/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 69/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
70 70
71#if ECB_NO_THREADS
72# define ECB_NO_SMP 1
73#endif
74
71#if ECB_NO_THREADS || ECB_NO_SMP 75#if ECB_NO_THREADS || ECB_NO_SMP
72 #define ECB_MEMORY_FENCE do { } while (0) 76 #define ECB_MEMORY_FENCE do { } while (0)
73 #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0)
74 #define ECB_MEMORY_FENCE_RELEASE do { } while (0)
75#endif 77#endif
76 78
77#ifndef ECB_MEMORY_FENCE 79#ifndef ECB_MEMORY_FENCE
78 #if ECB_GCC_VERSION(2,5) 80 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
79 #if __x86 81 #if __i386 || __i386__
80 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 82 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
81 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 83 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
82 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 84 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
83 #elif __amd64 85 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
84 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
85 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 87 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
86 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 88 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
87 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 89 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
88 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 90 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
89 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ 91 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
90 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \ 92 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
93 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
91 || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ 94 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
92 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) 95 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
93 #define ECB_MEMORY_FENCE \ 96 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
94 do { \ 97 #elif __sparc || __sparc__
95 int null = 0; \ 98 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
96 __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \ 99 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
97 while (0) 100 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
101 #elif defined(__s390__) || defined(__s390x__)
102 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
103 #elif defined(__mips__)
104 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
98 #endif 105 #endif
99 #endif 106 #endif
100#endif 107#endif
101 108
102#ifndef ECB_MEMORY_FENCE 109#ifndef ECB_MEMORY_FENCE
103 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) 110 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
104 #define ECB_MEMORY_FENCE __sync_synchronize () 111 #define ECB_MEMORY_FENCE __sync_synchronize ()
105 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 112 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
106 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 113 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
107 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 114 #elif _MSC_VER >= 1400 /* VC++ 2005 */
108 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 115 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
… …
110 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 117 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
111 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 118 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
112 #elif defined(_WIN32) 119 #elif defined(_WIN32)
113 #include <WinNT.h> 120 #include <WinNT.h>
114 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 121 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
122 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
123 #include <mbarrier.h>
124 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
125 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
126 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
127 #elif __xlC__
128 #define ECB_MEMORY_FENCE __sync ()
115 #endif 129 #endif
116#endif 130#endif
117 131
118#ifndef ECB_MEMORY_FENCE 132#ifndef ECB_MEMORY_FENCE
119 #if !ECB_AVOID_PTHREADS 133 #if !ECB_AVOID_PTHREADS
… …
294 308
295 return r + ecb_ld32 (x); 309 return r + ecb_ld32 (x);
296 } 310 }
297#endif 311#endif
298 312
313ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
314ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
315{
316 return ( (x * 0x0802U & 0x22110U)
317 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
318}
319
320ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
321ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
322{
323 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
324 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
325 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
326 x = ( x >> 8 ) | ( x << 8);
327
328 return x;
329}
330
331ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
332ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
333{
334 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
335 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
336 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
337 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
338 x = ( x >> 16 ) | ( x << 16);
339
340 return x;
341}
342
299/* popcount64 is only available on 64 bit cpus as gcc builtin */ 343/* popcount64 is only available on 64 bit cpus as gcc builtin */
300/* so for this version we are lazy */ 344/* so for this version we are lazy */
301ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 345ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
302ecb_function_ int 346ecb_function_ int
303ecb_popcount64 (uint64_t x) 347ecb_popcount64 (uint64_t x)
… …
352 396
353#if ECB_GCC_VERSION(4,5) 397#if ECB_GCC_VERSION(4,5)
354 #define ecb_unreachable() __builtin_unreachable () 398 #define ecb_unreachable() __builtin_unreachable ()
355#else 399#else
356 /* this seems to work fine, but gcc always emits a warning for it :/ */ 400 /* this seems to work fine, but gcc always emits a warning for it :/ */
357 ecb_function_ void ecb_unreachable (void) ecb_noreturn; 401 ecb_inline void ecb_unreachable (void) ecb_noreturn;
358 ecb_function_ void ecb_unreachable (void) { } 402 ecb_inline void ecb_unreachable (void) { }
359#endif 403#endif
360 404
361/* try to tell the compiler that some condition is definitely true */ 405/* try to tell the compiler that some condition is definitely true */
362#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 406#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
363 407
364ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; 408ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
365ecb_function_ unsigned char 409ecb_inline unsigned char
366ecb_byteorder_helper (void) 410ecb_byteorder_helper (void)
367{ 411{
368 const uint32_t u = 0x11223344; 412 const uint32_t u = 0x11223344;
369 return *(unsigned char *)&u; 413 return *(unsigned char *)&u;
370} 414}
371 415
372ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; 416ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
373ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 417ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
374ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; 418ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
375ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 419ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
376 420
377#if ECB_GCC_VERSION(3,0) || ECB_C99 421#if ECB_GCC_VERSION(3,0) || ECB_C99
378 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 422 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
379#else 423#else
380 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 424 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
425#endif
426
427#if __cplusplus
428 template<typename T>
429 static inline T ecb_div_rd (T val, T div)
430 {
431 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
432 }
433 template<typename T>
434 static inline T ecb_div_ru (T val, T div)
435 {
436 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
437 }
438#else
439 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
440 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
381#endif 441#endif
382 442
383#if ecb_cplusplus_does_not_suck 443#if ecb_cplusplus_does_not_suck
384 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ 444 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
385 template<typename T, int N> 445 template<typename T, int N>

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