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Comparing libecb/ecb.h (file contents):
Revision 1.70 by root, Sat Dec 10 11:58:38 2011 UTC vs.
Revision 1.81 by root, Fri Mar 23 19:04:07 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#endif 77#endif
74 78
75#ifndef ECB_MEMORY_FENCE 79#ifndef ECB_MEMORY_FENCE
76 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__) 80 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
77 #if __i386__ 81 #if __i386 || __i386__
78 #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")
79 #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 */
80 #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 */
81 #elif __amd64 85 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
82 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
83 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 87 #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 */ 88 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
85 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 89 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 90 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
… …
88 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) 92 || 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") 93 #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__ ) \ 94 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
91 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) 95 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
92 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 96 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
97 #elif __sparc || __sparc__
98 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
99 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
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")
105 #elif __xlC__
106 #define ECB_MEMORY_FENCE __lwsync ()
93 #endif 107 #endif
94 #endif 108 #endif
95#endif 109#endif
96 110
97#ifndef ECB_MEMORY_FENCE 111#ifndef ECB_MEMORY_FENCE
… …
105 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 119 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
106 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 120 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
107 #elif defined(_WIN32) 121 #elif defined(_WIN32)
108 #include <WinNT.h> 122 #include <WinNT.h>
109 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 123 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
124 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
125 #include <mbarrier.h>
126 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
127 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
128 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
110 #endif 129 #endif
111#endif 130#endif
112 131
113#ifndef ECB_MEMORY_FENCE 132#ifndef ECB_MEMORY_FENCE
114 #if !ECB_AVOID_PTHREADS 133 #if !ECB_AVOID_PTHREADS
… …
289 308
290 return r + ecb_ld32 (x); 309 return r + ecb_ld32 (x);
291 } 310 }
292#endif 311#endif
293 312
313ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
294ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 314ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
295{ 315{
296 return ( (x * 0x0802U & 0x22110U) 316 return ( (x * 0x0802U & 0x22110U)
297 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 317 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
298} 318}
299 319
320ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
300ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) 321ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
301{ 322{
302 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); 323 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
303 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); 324 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
304 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); 325 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
305 x = ( x >> 8 ) | ( x << 8); 326 x = ( x >> 8 ) | ( x << 8);
306 327
307 return x; 328 return x;
308} 329}
309 330
331ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
310ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) 332ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
311{ 333{
312 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); 334 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
313 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); 335 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
314 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); 336 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
… …
374 396
375#if ECB_GCC_VERSION(4,5) 397#if ECB_GCC_VERSION(4,5)
376 #define ecb_unreachable() __builtin_unreachable () 398 #define ecb_unreachable() __builtin_unreachable ()
377#else 399#else
378 /* 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 :/ */
379 ecb_function_ void ecb_unreachable (void) ecb_noreturn; 401 ecb_inline void ecb_unreachable (void) ecb_noreturn;
380 ecb_function_ void ecb_unreachable (void) { } 402 ecb_inline void ecb_unreachable (void) { }
381#endif 403#endif
382 404
383/* try to tell the compiler that some condition is definitely true */ 405/* try to tell the compiler that some condition is definitely true */
384#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 406#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
385 407
386ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; 408ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
387ecb_function_ unsigned char 409ecb_inline unsigned char
388ecb_byteorder_helper (void) 410ecb_byteorder_helper (void)
389{ 411{
390 const uint32_t u = 0x11223344; 412 const uint32_t u = 0x11223344;
391 return *(unsigned char *)&u; 413 return *(unsigned char *)&u;
392} 414}
393 415
394ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; 416ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
395ecb_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; }
396ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; 418ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
397ecb_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; }
398 420
399#if ECB_GCC_VERSION(3,0) || ECB_C99 421#if ECB_GCC_VERSION(3,0) || ECB_C99
400 #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))
401#else 423#else
402 #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)))

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