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Comparing libecb/ecb.h (file contents):
Revision 1.56 by sf-exg, Thu Jul 28 13:45:44 2011 UTC vs.
Revision 1.88 by root, Mon May 28 08:40:25 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:
… …
28 */ 28 */
29 29
30#ifndef ECB_H 30#ifndef ECB_H
31#define ECB_H 31#define ECB_H
32 32
33/* 16 bits major, 16 bits minor */
34#define ECB_VERSION 0x00010001
35
33#ifdef _WIN32 36#ifdef _WIN32
34 typedef signed char int8_t; 37 typedef signed char int8_t;
35 typedef unsigned char uint8_t; 38 typedef unsigned char uint8_t;
36 typedef signed short int16_t; 39 typedef signed short int16_t;
37 typedef unsigned short uint16_t; 40 typedef unsigned short uint16_t;
… …
42 typedef unsigned long long uint64_t; 45 typedef unsigned long long uint64_t;
43 #else /* _MSC_VER || __BORLANDC__ */ 46 #else /* _MSC_VER || __BORLANDC__ */
44 typedef signed __int64 int64_t; 47 typedef signed __int64 int64_t;
45 typedef unsigned __int64 uint64_t; 48 typedef unsigned __int64 uint64_t;
46 #endif 49 #endif
50 #ifdef _WIN64
51 #define ECB_PTRSIZE 8
52 typedef uint64_t uintptr_t;
53 typedef int64_t intptr_t;
54 #else
55 #define ECB_PTRSIZE 4
56 typedef uint32_t uintptr_t;
57 typedef int32_t intptr_t;
58 #endif
47#else 59#else
48 #include <inttypes.h> 60 #include <inttypes.h>
61 #if UINTMAX_MAX > 0xffffffffU
62 #define ECB_PTRSIZE 8
63 #else
64 #define ECB_PTRSIZE 4
65 #endif
49#endif 66#endif
50 67
51/* many compilers define _GNUC_ to some versions but then only implement 68/* many compilers define _GNUC_ to some versions but then only implement
52 * what their idiot authors think are the "more important" extensions, 69 * what their idiot authors think are the "more important" extensions,
53 * causing enourmous grief in return for some better fake benchmark numbers. 70 * causing enormous grief in return for some better fake benchmark numbers.
54 * or so. 71 * or so.
55 * we try to detect these and simply assume they are not gcc - if they have 72 * we try to detect these and simply assume they are not gcc - if they have
56 * an issue with that they should have done it right in the first place. 73 * an issue with that they should have done it right in the first place.
57 */ 74 */
58#ifndef ECB_GCC_VERSION 75#ifndef ECB_GCC_VERSION
59 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 76 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
60 #define ECB_GCC_VERSION(major,minor) 0 77 #define ECB_GCC_VERSION(major,minor) 0
61 #else 78 #else
62 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 79 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
63 #endif 80 #endif
64#endif 81#endif
65 82
66/*****************************************************************************/ 83/*****************************************************************************/
67 84
85/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
86/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
87
88#if ECB_NO_THREADS
89# define ECB_NO_SMP 1
90#endif
91
92#if ECB_NO_THREADS || ECB_NO_SMP
93 #define ECB_MEMORY_FENCE do { } while (0)
94#endif
95
68#ifndef ECB_MEMORY_FENCE 96#ifndef ECB_MEMORY_FENCE
69 #if ECB_GCC_VERSION(2,5) 97 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
70 #if __x86 98 #if __i386 || __i386__
71 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 99 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
72 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 100 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
73 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */ 101 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
74 #elif __amd64 102 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
75 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 103 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
76 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 104 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
105 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
106 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
77 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") 107 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
108 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
109 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
110 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
111 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
112 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
113 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
114 #elif __sparc || __sparc__
115 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
116 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
117 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
118 #elif defined __s390__ || defined __s390x__
119 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
120 #elif defined __mips__
121 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
122 #elif defined __alpha__
123 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
78 #endif 124 #endif
79 #endif 125 #endif
80#endif 126#endif
81 127
82#ifndef ECB_MEMORY_FENCE 128#ifndef ECB_MEMORY_FENCE
83 #if ECB_GCC_VERSION(4,4) 129 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
84 #define ECB_MEMORY_FENCE __sync_synchronize () 130 #define ECB_MEMORY_FENCE __sync_synchronize ()
85 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) 131 /*#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 ); }) 132 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
87 #elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */ 133 #elif _MSC_VER >= 1400 /* VC++ 2005 */
134 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
88 #define ECB_MEMORY_FENCE do { } while (0) 135 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
89 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 136 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
90 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 137 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
91 #elif defined(_WIN32) 138 #elif defined _WIN32
92 #include <WinNT.h> 139 #include <WinNT.h>
140 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
141 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
142 #include <mbarrier.h>
93 #define ECB_MEMORY_FENCE MemoryBarrier () 143 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
94 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 144 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
95 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 145 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
146 #elif __xlC__
147 #define ECB_MEMORY_FENCE __sync ()
96 #endif 148 #endif
97#endif 149#endif
98 150
99#ifndef ECB_MEMORY_FENCE 151#ifndef ECB_MEMORY_FENCE
152 #if !ECB_AVOID_PTHREADS
153 /*
154 * if you get undefined symbol references to pthread_mutex_lock,
155 * or failure to find pthread.h, then you should implement
156 * the ECB_MEMORY_FENCE operations for your cpu/compiler
157 * OR provide pthread.h and link against the posix thread library
158 * of your system.
159 */
100 #include <pthread.h> 160 #include <pthread.h>
161 #define ECB_NEEDS_PTHREADS 1
162 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
101 163
102 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 164 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
103 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) 165 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
166 #endif
167#endif
168
169#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
104 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 170 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
171#endif
172
173#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
105 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 174 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
106#endif 175#endif
107 176
108/*****************************************************************************/ 177/*****************************************************************************/
109 178
… …
258 327
259 return r + ecb_ld32 (x); 328 return r + ecb_ld32 (x);
260 } 329 }
261#endif 330#endif
262 331
332ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
333ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
334ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
335ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
336
337ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
338ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
339{
340 return ( (x * 0x0802U & 0x22110U)
341 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
342}
343
344ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
345ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
346{
347 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
348 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
349 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
350 x = ( x >> 8 ) | ( x << 8);
351
352 return x;
353}
354
355ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
356ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
357{
358 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
359 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
360 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
361 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
362 x = ( x >> 16 ) | ( x << 16);
363
364 return x;
365}
366
263/* popcount64 is only available on 64 bit cpus as gcc builtin */ 367/* popcount64 is only available on 64 bit cpus as gcc builtin */
264/* so for this version we are lazy */ 368/* so for this version we are lazy */
265ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; 369ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
266ecb_function_ int 370ecb_function_ int
267ecb_popcount64 (uint64_t x) 371ecb_popcount64 (uint64_t x)
… …
316 420
317#if ECB_GCC_VERSION(4,5) 421#if ECB_GCC_VERSION(4,5)
318 #define ecb_unreachable() __builtin_unreachable () 422 #define ecb_unreachable() __builtin_unreachable ()
319#else 423#else
320 /* this seems to work fine, but gcc always emits a warning for it :/ */ 424 /* this seems to work fine, but gcc always emits a warning for it :/ */
321 ecb_function_ void ecb_unreachable (void) ecb_noreturn; 425 ecb_inline void ecb_unreachable (void) ecb_noreturn;
322 ecb_function_ void ecb_unreachable (void) { } 426 ecb_inline void ecb_unreachable (void) { }
323#endif 427#endif
324 428
325/* try to tell the compiler that some condition is definitely true */ 429/* try to tell the compiler that some condition is definitely true */
326#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 430#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
327 431
328ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const; 432ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
329ecb_function_ unsigned char 433ecb_inline unsigned char
330ecb_byteorder_helper (void) 434ecb_byteorder_helper (void)
331{ 435{
332 const uint32_t u = 0x11223344; 436 const uint32_t u = 0x11223344;
333 return *(unsigned char *)&u; 437 return *(unsigned char *)&u;
334} 438}
335 439
336ecb_function_ ecb_bool ecb_big_endian (void) ecb_const; 440ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
337ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 441ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
338ecb_function_ ecb_bool ecb_little_endian (void) ecb_const; 442ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
339ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 443ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
340 444
341#if ECB_GCC_VERSION(3,0) || ECB_C99 445#if ECB_GCC_VERSION(3,0) || ECB_C99
342 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 446 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
343#else 447#else
344 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 448 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
449#endif
450
451#if __cplusplus
452 template<typename T>
453 static inline T ecb_div_rd (T val, T div)
454 {
455 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
456 }
457 template<typename T>
458 static inline T ecb_div_ru (T val, T div)
459 {
460 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
461 }
462#else
463 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
464 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
345#endif 465#endif
346 466
347#if ecb_cplusplus_does_not_suck 467#if ecb_cplusplus_does_not_suck
348 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ 468 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
349 template<typename T, int N> 469 template<typename T, int N>

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